US5583519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extendable antenna for a radio transceiver
Assignee: Toshiba Corp
•
Filing: 1993-04-20
•
Granted: 1996-12-10
•
Expires: 2013-04-20
Abstract
Abstract This extendable antenna is related to an extendable antenna for a portable radio transceiver. The antenna has a first antenna portion and a second antenna portion connected with a connecting portion of the first antenna portion. The first antenna has a loading coil which is enclosed in a top end cap. When the second antenna portion is retracted into a housing, the connecting portion is held by a holding member disposed in the top of the housing, and the connecting portion is ellectrically connected with the circuitry of the transceiver via the holding member. Furthermore, the electrical length of the loading coil is a quarter wavelength, while the physical length of the loading coil is much less than a quarter wavelength. Accordingly, even if the top end cap is only located out of the housing, the first antenna portion detects a radio frequency signal. Furthermore it is unnecessary for the radio transceiver to have an inner antenna and a rod antenna, and switching means for switching from the rod antenna to the inner antenna. And it is unnecessary for the housing to have space for the the inner antenna.
Inventors
- 👤 Noboru Koike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:17
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q1/244
Claims Analysis
Total Claims: 86
Claim 1
Independent Claim
129 words
An extendable antenna for a radio transceiver provided in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion including first and second ends; a conductive connecting portion connecting an end of said first antenna portion to said first end of said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said second antenna portion is retracted into said housing; and a conductive stopper portion connected to said second end of said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said housing.
Claim 2
Dependent Claim
129 words
An extendable antenna for a radio transceiver provided in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion including first and second ends; a conductive connecting portion connecting an end of said first antenna portion to said first end of said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said second antenna portion is retracted into said housing; and a conductive stopper portion connected to said second end of said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said housing.
Claim 3
Dependent Claim
19 words
An extendable antenna according to claim 1, wherein said loading portion comprises a winding portion coated with nonconductive material.
Claim 4
Dependent Claim
14 words
An extendable antenna according to claim 1, wherein said second antenna portion is flexible.
Claim 5
Dependent Claim
24 words
An extendable antenna according to claim 1, wherein said second antenna portion has a conductive portion and a non-conductive portion enclosing said conductive portion.
Claim 6
Dependent Claim
48 words
An extendable antenna according to claim 1, wherein said feeding portion includes a holding member for holding said conductive stopper portion when said second antenna portion is extended from said housing and for holding said conductive connecting portion when said second antenna portion is retracted into said housing.
Claim 7
Dependent Claim
52 words
An extendable antenna according to claim 1, wherein said second antenna portion has a conductive hollow portion having an inner surface and a core portion having an engagement portion at an end of said core portion, said engagement portion being in sliding engagement with said inner surface of said conductive hollow portion.
Claim 8
Dependent Claim
84 words
An extendable antenna according to claim 6, wherein said feeding portion includes a holding member for holding said conductive stopper portion when said second antenna portion is extended from said housing and for holding said conductive connecting portion when said second antenna portion is retracted into said housing, and an engagement force of said engagement portion of said core portion engaging said inner surface of said conductive hollow portion is smaller than a holding force of said holding member holding said conductive stopper portion.
Claim 9
Dependent Claim
137 words
An extendable antenna device for a radio transceiver provided in a housing, said extendable antenna device comprising: a feeding portion disposed to said housing and electrically connected with circuitry of said transceiver; and an extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion including first and second ends; a conductive connecting portion connecting an end of said first antenna portion to said first end of said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said second antenna portion is retracted into said housing; and a conductive stopper portion connected to said second end of said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said housing.
Claim 10
Dependent Claim
137 words
An extendable antenna device for a radio transceiver provided in a housing, said extendable antenna device comprising: a feeding portion disposed to said housing and electrically connected with circuitry of said transceiver; and an extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion including first and second ends; a conductive connecting portion connecting an end of said first antenna portion to said first end of said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said second antenna portion is retracted into said housing; and a conductive stopper portion connected to said second end of said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said housing.
Claim 11
Dependent Claim
125 words
An extendable antenna for a radio transceiver, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion including first and second ends; a conductive connecting portion connecting an end of said first antenna portion to said first end of said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said second antenna portion is retracted into said transceiver; and a conductive stopper portion connected to said second end of said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said transceiver.
Claim 12
Dependent Claim
125 words
An extendable antenna for a radio transceiver, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion including first and second ends; a conductive connecting portion connecting an end of said first antenna portion to said first end of said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said second antenna portion is retracted into said transceiver; and a conductive stopper portion connected to said second end of said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said transceiver.
Claim 13
Dependent Claim
113 words
An extendable antenna for a radio transceiver provided in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion; a conductive connecting portion connecting said first antenna portion to said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said second antenna portion is retracted into said housing; and a conductive stopper portion connected to said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said housing.
Claim 14
Dependent Claim
113 words
An extendable antenna for a radio transceiver provided in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion; a conductive connecting portion connecting said first antenna portion to said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said second antenna portion is retracted into said housing; and a conductive stopper portion connected to said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said housing.
Claim 15
Dependent Claim
127 words
An extendable antenna for a radio transceiver, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion including first and second ends; a conductive connecting portion connecting an end of said first antenna portion to said first end of said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said extendable antenna is shortened by at least a predetermined amount; and a conductive stopper portion connected to said second end of said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said housing.
Claim 16
Dependent Claim
127 words
An extendable antenna for a radio transceiver, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion including first and second ends; a conductive connecting portion connecting an end of said first antenna portion to said first end of said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said extendable antenna is shortened by at least a predetermined amount; and a conductive stopper portion connected to said second end of said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said housing.
Claim 17
Dependent Claim
128 words
An extendable antenna for a radio transceiver, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion including first and second ends; a conductive connecting portion connecting an end of said first antenna portion to said first end of said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said extendable antenna is reduced in length at least a predetermined amount; and a conductive stopper portion connected to said second end of said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said housing.
Claim 18
Dependent Claim
128 words
An extendable antenna for a radio transceiver, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a second antenna portion including first and second ends; a conductive connecting portion connecting an end of said first antenna portion to said first end of said second antenna portion, said conductive connecting portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said extendable antenna is reduced in length at least a predetermined amount; and a conductive stopper portion connected to said second end of said second antenna portion, said conductive stopper portion contacting said feeding portion when said second antenna portion is extended from said housing.
Claim 19
Dependent Claim
146 words
An extendable antenna for a radio transceiver provided in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a first conductive portion, an end of said loading portion being inserted into said first conductive portion; a second conductive portion having first and second opposing ends, said first conductive portion being inserted into said first end of said second conductive portion, said second conductive portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said extendable antenna is retracted; a second antenna portion inserted into said second end of said second conductive portion; and a conductive stopper portion connected to said second antenna portion, said conductive stopper portion contacting said feeding portion when said extendable antenna is extended from said housing.
Claim 20
Dependent Claim
146 words
An extendable antenna for a radio transceiver provided in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first antenna portion having a loading portion; a first conductive portion, an end of said loading portion being inserted into said first conductive portion; a second conductive portion having first and second opposing ends, said first conductive portion being inserted into said first end of said second conductive portion, said second conductive portion contacting said feeding portion and said first antenna portion being disposed to receive RF signals when said extendable antenna is retracted; a second antenna portion inserted into said second end of said second conductive portion; and a conductive stopper portion connected to said second antenna portion, said conductive stopper portion contacting said feeding portion when said extendable antenna is extended from said housing.
Claim 21
Dependent Claim
120 words
An extendable antenna for a radio transceiver having circuitry and a feeding portion electrically coupled to the circuitry, comprising: an extendable antenna portion having a first conductive portion at one end and an opposite end; and a loading antenna portion, including a second conductive portion, connected to the opposite end of said extendable antenna portion, wherein said extendable antenna portion is mounted for extension to an extended position in which said extendable antenna portion is coupled to the feeding portion via said first conductive portion and for retraction to a retracted position in which said loading antenna portion is coupled to the feeding portion via said second conductive portion and the loading antenna portion is disposed to receive RF signals.
Claim 22
Dependent Claim
120 words
An extendable antenna for a radio transceiver having circuitry and a feeding portion electrically coupled to the circuitry, comprising: an extendable antenna portion having a first conductive portion at one end and an opposite end; and a loading antenna portion, including a second conductive portion, connected to the opposite end of said extendable antenna portion, wherein said extendable antenna portion is mounted for extension to an extended position in which said extendable antenna portion is coupled to the feeding portion via said first conductive portion and for retraction to a retracted position in which said loading antenna portion is coupled to the feeding portion via said second conductive portion and the loading antenna portion is disposed to receive RF signals.
Claim 23
Dependent Claim
32 words
An extendable antenna according to claim 14, wherein an electrical length of the loading antenna portion is substantially N times as long as a quarter wavelength, where N is an odd number.
Claim 24
Dependent Claim
97 words
An extendable antenna for a radio transceiver provided in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said radion transceiver, comprising: first antenna means having a loading portion and a conductive portion at an end of said first antenna means; and second antenna means connected to said conductive portion; wherein when said extendable antenna is shortened by at least a predetermined amount, said loading portion is connected to said circuitry via said conductive portion and at least a predetermined amount of the first antenna means is located out of said housing.
Claim 25
Dependent Claim
97 words
An extendable antenna for a radio transceiver provided in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said radion transceiver, comprising: first antenna means having a loading portion and a conductive portion at an end of said first antenna means; and second antenna means connected to said conductive portion; wherein when said extendable antenna is shortened by at least a predetermined amount, said loading portion is connected to said circuitry via said conductive portion and at least a predetermined amount of the first antenna means is located out of said housing.
Claim 26
Dependent Claim
105 words
An extendable antenna for a radio transceiver having circuitry provided in a housing, comprising: first antenna means having a loading portion and a first conductive portion; and second antenna means connected to said first conductive portion and having a second conductive portion; wherein when said extendable antenna is extended, said second antenna means is connected to said circuitry via said second conductive portion, and when said extendable antenna is shortened by at least a predetermined amount, said loading portion is connected to said circuitry via said conductive portion and at least a predetermined amount of said first antenna means is located out of said housing.
Claim 27
Dependent Claim
105 words
An extendable antenna for a radio transceiver having circuitry provided in a housing, comprising: first antenna means having a loading portion and a first conductive portion; and second antenna means connected to said first conductive portion and having a second conductive portion; wherein when said extendable antenna is extended, said second antenna means is connected to said circuitry via said second conductive portion, and when said extendable antenna is shortened by at least a predetermined amount, said loading portion is connected to said circuitry via said conductive portion and at least a predetermined amount of said first antenna means is located out of said housing.
Claim 28
Dependent Claim
74 words
An antenna for a radio transceiver having circuitry included in a housing, comprising: first antenna means having a loading portion and a conductive portion; and second antenna means connected to said conductive portion; wherein when said antenna is shortened by at least a predetermined amount, said loading portion is connected to said circuitry via said conductive portion and at least a predetermined amount of said first antenna means is located out of said housing.
Claim 29
Dependent Claim
74 words
An antenna for a radio transceiver having circuitry included in a housing, comprising: first antenna means having a loading portion and a conductive portion; and second antenna means connected to said conductive portion; wherein when said antenna is shortened by at least a predetermined amount, said loading portion is connected to said circuitry via said conductive portion and at least a predetermined amount of said first antenna means is located out of said housing.
Claim 30
Dependent Claim
75 words
A radio transceiver comprising: a circuitry included in a housing; and an antenna comprising: first antenna means having a loading portion and a conductive portion; and second antenna means connected to said conductive portion; wherein when said antenna is shortened by at least a predetermined amount, said loading portion is connected to said circuitry via said conductive portion and at least a predetermined amount of said first antenna means is located out of said housing.
Claim 31
Dependent Claim
75 words
A radio transceiver comprising: a circuitry included in a housing; and an antenna comprising: first antenna means having a loading portion and a conductive portion; and second antenna means connected to said conductive portion; wherein when said antenna is shortened by at least a predetermined amount, said loading portion is connected to said circuitry via said conductive portion and at least a predetermined amount of said first antenna means is located out of said housing.
Claim 32
Dependent Claim
101 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a loading coil disposed in a top portion of said extendable antenna; a bottom portion for connecting said extendable antenna with said feeding portion when said extendable antenna is extended from said housing; and a connecting portion disposed between said loading coil and said bottom portion for connecting said loading coil with said feeding portion when only at least a predetermined amount of said loading coil is located out of said housing.
Claim 33
Dependent Claim
101 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a loading coil disposed in a top portion of said extendable antenna; a bottom portion for connecting said extendable antenna with said feeding portion when said extendable antenna is extended from said housing; and a connecting portion disposed between said loading coil and said bottom portion for connecting said loading coil with said feeding portion when only at least a predetermined amount of said loading coil is located out of said housing.
Claim 34
Dependent Claim
122 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first portion including a loading coil and a first conductive portion electrically connected with said loading coil; and a second portion including a second conductive portion, wherein said loading coil is electrically coupled to said feeding portion via said first conductive portion and at least a predetermined amount of said loading coil is located out of said housing when said second portion is retracted into said housing, and said second portion is electrically coupled via said second conductive portion to said feeding portion when said extendable antenna is extended from said housing.
Claim 35
Dependent Claim
122 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: a first portion including a loading coil and a first conductive portion electrically connected with said loading coil; and a second portion including a second conductive portion, wherein said loading coil is electrically coupled to said feeding portion via said first conductive portion and at least a predetermined amount of said loading coil is located out of said housing when said second portion is retracted into said housing, and said second portion is electrically coupled via said second conductive portion to said feeding portion when said extendable antenna is extended from said housing.
Claim 36
Dependent Claim
99 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said loading coil; and second antenna means provided with said first conductive portion including a second conductive portion, wherein when said extendable antenna is extended from said housing, said second conductive portion contacts said feeding portion, and when said second antenna means is retracted into said housing, said first conductive portion contacts said feeding portion.
Claim 37
Dependent Claim
99 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said loading coil; and second antenna means provided with said first conductive portion including a second conductive portion, wherein when said extendable antenna is extended from said housing, said second conductive portion contacts said feeding portion, and when said second antenna means is retracted into said housing, said first conductive portion contacts said feeding portion.
Claim 38
Dependent Claim
132 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said loading coil; and second antenna means provided with said first conductive portion and including a second conductive portion, wherein when said extendable antenna is extended from said housing, said second conductive portion is electrically connected with said feeding portion, and when said second antenna means is retracted into said housing, said first conductive portion is electrically connected with said feeding portion and said loading coil is located out of said housing and at least a predetermined amount of said loading coil is located out of said housing.
Claim 39
Dependent Claim
132 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said loading coil; and second antenna means provided with said first conductive portion and including a second conductive portion, wherein when said extendable antenna is extended from said housing, said second conductive portion is electrically connected with said feeding portion, and when said second antenna means is retracted into said housing, said first conductive portion is electrically connected with said feeding portion and said loading coil is located out of said housing and at least a predetermined amount of said loading coil is located out of said housing.
Claim 40
Dependent Claim
31 words
An extendable antenna as in one of claims 21-23, wherein an electrical length of the first antenna means is substantially the same as an electrical length of the second antenna means.
Claim 41
Dependent Claim
116 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said loading coil; and second antenna means provided with said first conductive portion and including a second conductive portion, wherein when said extendable antenna is extended from said housing, said second antenna means is electrically connected with said feeding portion via said second conductive portion, and when said second antenna means is retracted into said housing, said first antenna means is electrically connected with said feeding portion via said first conductive portion.
Claim 42
Dependent Claim
116 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said loading coil; and second antenna means provided with said first conductive portion and including a second conductive portion, wherein when said extendable antenna is extended from said housing, said second antenna means is electrically connected with said feeding portion via said second conductive portion, and when said second antenna means is retracted into said housing, said first antenna means is electrically connected with said feeding portion via said first conductive portion.
Claim 43
Dependent Claim
33 words
An extendable antenna according to claim 25, wherein an electrical length of the first antenna means is a quarter wavelength and an electrical length of the second antenna means is a quarter wavelength.
Claim 44
Dependent Claim
31 words
An extendable antenna according to claim 5, wherein the electrical length of said loading coil is substantially N times as long as a quarter wavelength, where N is an integral number.
Claim 45
Dependent Claim
32 words
An extendable antenna according to claim 25, wherein the electrical length of said second antenna means is substantially N times as long as a quarter wavelength, where N is an integral number.
Claim 46
Dependent Claim
68 words
An extendable antenna according to claim 25, wherein said radio transceiver has a ground portion, the electrical length from said first conductive portion to said second conductive portion of said second antenna means is substantially N times as long as a quarter wavelength, where N is an odd number, and when said second antenna means is retracted into said housing, said second conductive portion contacts said ground portion.
Claim 47
Dependent Claim
31 words
An extendable antenna for a radio transceiver according to claim 25, wherein said first antenna means has a top end cap, said loading coil is enclosed in said top end cap.
Claim 48
Dependent Claim
69 words
An extendable antenna for a radio transceiver according to claim 25, wherein said housing has a top portion, said feeding portion is a holding member disposed in said top portion, when said extendable antenna is extended from said housing, said second conductive portion is held by said holding member, when said second antenna means is retracted into said housing, said first conductive portion is held by said holding member.
Claim 49
Dependent Claim
74 words
An extendable antenna for a radio transceiver according to claim 31, wherein said second antenna means has a stopper portion disposed in a bottom portion of said second antenna means, said holding member has elastic tongues, when said extendable antenna is extended from said housing, said stopper portion is engaged with said elastic tongues, when said second antenna means is retracted into said housing, said first conductive portion is held by said elastic tongues.
Claim 50
Dependent Claim
66 words
An extendable antenna for a radio transceiver according to claim 31, wherein said holding member has a circular hole, said first antenna means has a circular top end cap, with the diameter of said top end cap being larger than the inner diameter of said hole, so that when said second antenna means is retracted into said housing, said top end cap strikes against said housing.
Claim 51
Dependent Claim
39 words
An extendable antenna for a radio transceiver according to claim 25, wherein said second antenna means comprises a first elongated portion connected with said first antenna means and a second elongated portion slidably connected with said first elongated portion.
Claim 52
Dependent Claim
21 words
An extendable antenna for a radio transceiver according to claim 34, wherein said second elongated portion is comprised of flexible material.
Claim 53
Dependent Claim
16 words
An extendable antenna according to claim 25, wherein said second antenna means includes a flexible wire.
Claim 54
Dependent Claim
96 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having circuitry and a feeding portion electrically connected with the circuitry, said extendable antenna comprising: first antenna means including a loading coil and a conductive portion electrically connected with said loading coil; and second antenna means provided with said conductive portion, wherein when said second antenna means is retracted into said housing, said loading coil is electrically connected with said feeding portion via said conductive portion and at least a predetermined amount of said loading coil is located out of said housing.
Claim 55
Dependent Claim
96 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having circuitry and a feeding portion electrically connected with the circuitry, said extendable antenna comprising: first antenna means including a loading coil and a conductive portion electrically connected with said loading coil; and second antenna means provided with said conductive portion, wherein when said second antenna means is retracted into said housing, said loading coil is electrically connected with said feeding portion via said conductive portion and at least a predetermined amount of said loading coil is located out of said housing.
Claim 56
Dependent Claim
108 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: first antenna means including a loading portion and a conductive portion electrically connected with said loading portion; and second antenna means provided with said conductive portion, wherein when said second antenna means is retracted into said housing, said loading portion is electrically connected with said feeding portion via said conductive portion and at least a predetermined amount of said first antenna means is located out of said housing and said first antenna means is disposed to receive RF signals.
Claim 57
Dependent Claim
108 words
An extendable antenna for a radio transceiver enclosed in a housing, said radio transceiver having a feeding portion electrically connected with circuitry of said transceiver, said extendable antenna comprising: first antenna means including a loading portion and a conductive portion electrically connected with said loading portion; and second antenna means provided with said conductive portion, wherein when said second antenna means is retracted into said housing, said loading portion is electrically connected with said feeding portion via said conductive portion and at least a predetermined amount of said first antenna means is located out of said housing and said first antenna means is disposed to receive RF signals.
Claim 58
Dependent Claim
17 words
An extendable antenna in accordance with claim 38, wherein said second antenna portion includes a rod portion.
Claim 59
Dependent Claim
42 words
An extendable antenna according to one of claims 1, 8, 39, 9, 10, 11, 12 or 13, wherein an electrical length of the first antenna portion is substantially N times as long as a quarter wavelength, where N is an odd number.
Claim 60
Dependent Claim
16 words
An extendable antenna according to claim 38, wherein said second antenna portion includes an elongated portion.
Claim 61
Dependent Claim
33 words
An extendable antenna according to claim 38, wherein the first antenna means has a first impedance and said second antenna means has a second impedance, said first and second impedances being the same.
Claim 62
Dependent Claim
95 words
A radio transceiver enclosed in a housing, comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: a loading coil disposed in a top portion of said extendable antenna; a bottom portion for connecting said extendable antenna with said feeding portion when said extendable antenna is extended from said housing; and a connecting portion disposed between said loading coil and said bottom portion for connecting said loading coil with said feeding portion when only at least a predetermined amount of said loading coil is located out of said housing.
Claim 63
Dependent Claim
95 words
A radio transceiver enclosed in a housing, comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: a loading coil disposed in a top portion of said extendable antenna; a bottom portion for connecting said extendable antenna with said feeding portion when said extendable antenna is extended from said housing; and a connecting portion disposed between said loading coil and said bottom portion for connecting said loading coil with said feeding portion when only at least a predetermined amount of said loading coil is located out of said housing.
Claim 64
Dependent Claim
116 words
A radio transceiver enclosed in a housing, comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: a first portion including a loading coil and a first conductive portion electrically connected with said loading coil; and a second portion including a second conductive portion, wherein said loading coil is electrically coupled to said feeding portion via said first conductive portion and at least a predetermined amount of said loading coil is located out of said housing when said second portion is retracted into said housing, and said second portion is electrically coupled to said feeding portion via said second conductive portion when said extendable antenna is extended from said housing.
Claim 65
Dependent Claim
116 words
A radio transceiver enclosed in a housing, comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: a first portion including a loading coil and a first conductive portion electrically connected with said loading coil; and a second portion including a second conductive portion, wherein said loading coil is electrically coupled to said feeding portion via said first conductive portion and at least a predetermined amount of said loading coil is located out of said housing when said second portion is retracted into said housing, and said second portion is electrically coupled to said feeding portion via said second conductive portion when said extendable antenna is extended from said housing.
Claim 66
Dependent Claim
87 words
A radio transceiver enclosed in a housing, comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said coil; and second antenna means provided with said first conductive portion, wherein when said extendable antenna is extended from said housing, said second antenna means contacts said feeding portion, and when said second antenna means is retracted into said housing, said first conductive portion contacts said feeding portion.
Claim 67
Dependent Claim
87 words
A radio transceiver enclosed in a housing, comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said coil; and second antenna means provided with said first conductive portion, wherein when said extendable antenna is extended from said housing, said second antenna means contacts said feeding portion, and when said second antenna means is retracted into said housing, said first conductive portion contacts said feeding portion.
Claim 68
Dependent Claim
124 words
A radio transceiver enclosed in a housing, comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said coil; and second antenna means provided with said first conductive portion and including a second conductive portion, wherein when said extendable antenna is extended from said housing, said second conductive portion is electrically connected with said feeding portion, and when said second antenna means is retracted into said housing, said first conductive portion is electrically connected with said feeding portion and said loading coil is located out of said housing, at least a predetermined amount of said loading coil is located out of said housing.
Claim 69
Dependent Claim
124 words
A radio transceiver enclosed in a housing, comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said coil; and second antenna means provided with said first conductive portion and including a second conductive portion, wherein when said extendable antenna is extended from said housing, said second conductive portion is electrically connected with said feeding portion, and when said second antenna means is retracted into said housing, said first conductive portion is electrically connected with said feeding portion and said loading coil is located out of said housing, at least a predetermined amount of said loading coil is located out of said housing.
Claim 70
Dependent Claim
124 words
A radio transceiver enclosed in a housing comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said coil; and second antenna means provided with said first conductive portion and including a second conductive portion, wherein when said extendable antenna is extended from said housing, said second antenna means is electrically connected with said feeding portion via said second conductive portion, and when said second antenna means is retracted into said housing, said first antenna means is electrically connected with said feeding portion via said first conductive portion, at least a predetermined amount of said loading coil is located out of said housing.
Claim 71
Dependent Claim
124 words
A radio transceiver enclosed in a housing comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: first antenna means including a loading coil and a first conductive portion electrically connected with said coil; and second antenna means provided with said first conductive portion and including a second conductive portion, wherein when said extendable antenna is extended from said housing, said second antenna means is electrically connected with said feeding portion via said second conductive portion, and when said second antenna means is retracted into said housing, said first antenna means is electrically connected with said feeding portion via said first conductive portion, at least a predetermined amount of said loading coil is located out of said housing.
Claim 72
Dependent Claim
31 words
A radio transceiver according to claim 47, wherein the electrical length of said loading coil is substantially N times as long as a quarter wavelength, where N is an integral number.
Claim 73
Dependent Claim
32 words
A radio transceiver according to claim 47, wherein the electrical length of said second antenna means is substantially N times as long as a quarter wavelength, where N is an integral number.
Claim 74
Dependent Claim
68 words
A radio transceiver according to claim 47, wherein said radio transceiver has a ground portion, the electrical length from said first conductive portion to said second conductive portion of said second antenna means is substantially N times as long as a quarter wavelength where N is an odd number, and when said second antenna means is retracted into said housing, said second conductive portion contacts said ground portion.
Claim 75
Dependent Claim
27 words
A radio transceiver according to claim 47, wherein said first antenna means as a top end cap, said loading coil is enclosed into said top end cap.
Claim 76
Dependent Claim
65 words
A radio transceiver according to claim 47, wherein said housing has a top portion, said feeding portion is a holding member disposed in said top portion, when said extendable antenna is extended from said housing, said second conductive portion is held by said holding member, when said second antenna means is retracted into said housing, said first conductive portion is held by said holding member.
Claim 77
Dependent Claim
70 words
A radio transceiver according to claim 52, wherein said second antenna means has a stopper portion disposed in a bottom portion of said second antenna means, said holding member has elastic tongues, when said extendable antenna is extended from said housing, said stopper portion is engaged with said elastic tongues, when said second antenna means is retracted into said housing, said first conductive portion is held by said elastic tongues.
Claim 78
Dependent Claim
68 words
A radio transceiver according to claim 52, wherein said holding member has a circular hole and said first antenna means has a top end cap, said top end cap is circular, with the diameter of said top end cap being larger than the inner diameter of said hole, so that when said second antenna means is retracted into said housing, said top end cap strikes against said housing.
Claim 79
Dependent Claim
35 words
A radio transceiver according to claim 47, wherein said second antenna means comprises a first elongated portion connected with said first antenna means and a second elongated portion slidably connected with said first elongated portion.
Claim 80
Dependent Claim
17 words
A radio transceiver according to claim 55, wherein said second elongated portion is comprised of flexible material.
Claim 81
Dependent Claim
16 words
A radio transceiver according to claim 47, wherein said second antenna means includes a flexible wire.
Claim 82
Dependent Claim
73 words
A radio transceiver enclosed in a housing comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: first antenna means including a loading coil and a conductive portion electrically connected with said coil; and second antenna means provided with said conductive portion, wherein when said second antenna means is retracted into said housing, said loading coil is electrically connected with said feeding portion via said conductive portion.
Claim 83
Dependent Claim
73 words
A radio transceiver enclosed in a housing comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: first antenna means including a loading coil and a conductive portion electrically connected with said coil; and second antenna means provided with said conductive portion, wherein when said second antenna means is retracted into said housing, said loading coil is electrically connected with said feeding portion via said conductive portion.
Claim 84
Dependent Claim
102 words
A radio transceiver enclosed in a housing comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: first antenna means including a loading portion and a conductive portion electrically connected with said loading portion; and second antenna means provided with said conductive portion, wherein when said second antenna means is retracted into said housing, said loading portion is electrically connected with said feeding portion via said conductive portion and at least a predetermined amount of said first antenna means is located out of said housing and said first antenna means is disposed to receive RF signals.
Claim 85
Dependent Claim
102 words
A radio transceiver enclosed in a housing comprising: a circuitry; a feeding portion electrically connected with said circuitry; and an extendable antenna comprising: first antenna means including a loading portion and a conductive portion electrically connected with said loading portion; and second antenna means provided with said conductive portion, wherein when said second antenna means is retracted into said housing, said loading portion is electrically connected with said feeding portion via said conductive portion and at least a predetermined amount of said first antenna means is located out of said housing and said first antenna means is disposed to receive RF signals.
Claim 86
Dependent Claim
33 words
A radio transceiver according to claim 59, wherein the first antenna means has a first impedance and said second antenna means has a second impedance, said first and second impedances being the same.
References Cited (Backward Citations)
US3087117A
Cited
US4104639A
Cited
US4095229A
Cited
US4121218A
Cited
US4190841A
Cited
JPS57118403A
Cited
JPS58109311A
Cited
US4598295A
Cited
JPS6230405A
Cited
JPS6242306A
Cited
US4725845A
Cited
US4890114A
Cited
US4862182A
Cited
EP0301175A2
Cited
JPH01129503A
Cited
JPH01160101A
Cited
US4860024A
Cited
JPH01204504A
Cited
US4958382A
Cited
US4868576A
Cited
US5204687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-10 | 2000-06-10 | 2000-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-10 | 2004-06-10 | 2004-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-10 | 2008-06-10 | 2008-12-10 | $7700.00 | Window Closed / Lapsed |