EP0259129A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Portable radio communication apparatus having diversity reception function
Assignee: NEC Corp
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Filing: 1987-08-28
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Granted: —
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Expires: 2007-08-28
Abstract
Abstract The apparatus comprises a transmitter (12) connected to a transmission filter (81) in a duplexer (8) and a diversity receiver (11) connected to a first reception filter (82) included in the duplexer and a second reception filter (10). A first antenna (1) is retractable or foldable against the housing (13) of the apparatus. An internal antenna (2) is mounted inside the housing. The retractable antenna (1) is mechanically coupled to switches (5 and 6) in an arrangement such that, when the antenna is retracted the internal antenna (2) is connected to the junction (9) between the transmission filter and the first reception filter (82); the first antenna (1) is disconnected. When the first antenna is extended it is connected by the switch (5) to the junction (9) between the transmission filter (81) and the reception filter (82) whereas the second antenna is connected by the switch (6) to the second reception filter (10).
Inventors
- 👤 Yoshiharu C/O Nec Corporation Tamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 20:54
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0802; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q1/244
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
130 words
A portable radio communication apparatus comprising: transmitter means; diversity receiver means; transmission filter means connected to said transmitter means; first and second reception filter means connected to said diversity receiver means; first antenna means capable of being received in a housing of said apparatus; second antenna means mounted inside of or on outer periphery of said housing; and switch means for connecting said second antenna means to a junction of said transmission filter means and first reception filter means in a first condition in which said first antenna means is received in said housing, and connecting said first antenna means to said junction and said second antenna means to said second reception filter means in a second condition in which said first antenna means is pulled out of said housing.
Claim 2
Dependent Claim
130 words
A portable radio communication apparatus comprising: transmitter means; diversity receiver means; transmission filter means connected to said transmitter means; first and second reception filter means connected to said diversity receiver means; first antenna means capable of being received in a housing of said apparatus; second antenna means mounted inside of or on outer periphery of said housing; and switch means for connecting said second antenna means to a junction of said transmission filter means and first reception filter means in a first condition in which said first antenna means is received in said housing, and connecting said first antenna means to said junction and said second antenna means to said second reception filter means in a second condition in which said first antenna means is pulled out of said housing.
Claim 3
Dependent Claim
108 words
An apparatus as claimed in claim 1, wherein said switch means comprises a first and a second switch which are interlocked with movement of said first antenna means into and out of said housing; said first switch, in the first condition, disconnecting said first antenna means from said junction while connecting said second antenna means and, in the second condition, disconnecting said second antenna means from said junction while connecting said first antenna means; said second switch, in the first condition, disconnecting said second antenna means from said second reception filter means and, in the second condition, connecting said second antenna means to said second reception filter means.
Claim 4
Dependent Claim
34 words
An apparatus as claimed in claim 2, wherein a line extending between said first and second switches has a length which is shorter than λ/4, where λ is a wavelength of a received signal.
Claim 5
Dependent Claim
36 words
An apparatus as claimed in claim 2, wherein a line extending between said first and second switches has a length which is an integral multiple of λ/2, where λ is a wavelength of a received signal.
Claim 6
Dependent Claim
16 words
An apparatus as claimed in claim 1, wherein said first antenna means comprises a sleeve antenna.
Claim 7
Dependent Claim
16 words
An apparatus as claimed in claim 1, wherein said first antenna means comprises a whip antenna.
Claim 8
Dependent Claim
16 words
An apparatus as claimed in claim 1, wherein said second antenna means comprises a microstrip antenna.
Claim 9
Dependent Claim
116 words
A portable radio communication apparatus comprising: first antenna means capable of selectively assuming a first condition wherein said first antenna means does not protrude from a housing of said apparatus, and a second condition wherein said first antenna means protrudes from said housing; second antenna means supported by said housing in such a manner as not to protrude from said housing; transmitter means; diversity receiver means; and switch means for, in the first condition, connecting said second antenna means to said transmitter means and diversity receiver means and, in the second condition, connecting said first antenna means to said transmitter means and diversity receiver means while connecting said second antenna means to said diversity receiver means.
Claim 10
Dependent Claim
116 words
A portable radio communication apparatus comprising: first antenna means capable of selectively assuming a first condition wherein said first antenna means does not protrude from a housing of said apparatus, and a second condition wherein said first antenna means protrudes from said housing; second antenna means supported by said housing in such a manner as not to protrude from said housing; transmitter means; diversity receiver means; and switch means for, in the first condition, connecting said second antenna means to said transmitter means and diversity receiver means and, in the second condition, connecting said first antenna means to said transmitter means and diversity receiver means while connecting said second antenna means to said diversity receiver means.
Claim 11
Dependent Claim
115 words
An apparatus as claimed in claim 8, wherein said switch means comprises a first and a second switch which are actuated in response to a change of condition of said first antenna means; said first switch, in the first condition, disconnecting said first antenna means from said transmitter means and diversity receiver means while connecting said second antenna means and, in the second condition, connecting said first antenna means to said transmitter means and diversity receiver means while disconnecting said second antenna means; said second switch, in the first condition, disconnecting said second antenna means from said diversity receiver means and, in the second condition, connecting said second antenna means to said diversity receiver means.
Claim 12
Dependent Claim
71 words
An apparatus as claimed in claim 9, further comprising a transmission filter connected to said transmitter means; a first reception filter connected to said diversity receiver means, said transmission filter and first reception filter being connected to each other, a junction of said transmitter filter and first reception filter being connected to said first switch; and a second reception filter connected between said second switch means and said diversity receiver means.
Claim 13
Dependent Claim
34 words
An apparatus as claimed in claim 10, wherein a line extending between said first and second switches has a length which is shorter than λ/4, where λ is a wavelength of a received signal.
Claim 14
Dependent Claim
32 words
An apparatus as claimed in claim 10, wherein a line extending between said first and second switches is an integral multiple of λ/2, where λ is a wavelength of a received signal.
Claim 15
Dependent Claim
36 words
An apparatus as claimed in claim 8, wherein said first antenna means comprises a sleeve antenna which is received in said housing in the first condition and pulled out from said housing in the second condition.
Claim 16
Dependent Claim
36 words
An apparatus as claimed in claim 8, wherein said first antenna means comprises a whip antenna which is received in said housing in the first condition and pulled out of said housing in the second condition.
Claim 17
Dependent Claim
40 words
An apparatus as claimed in claim 8, wherein said first antenna means comprises a whip antenna which is folded along outer periphery of said housing in the first condition and unfolded to stand on said housing in the second condition.
Claim 18
Dependent Claim
22 words
An apparatus as claimed in claim 8, wherein said second antenna means comprises a microstrip antenna which is built in said housing.
Claim 19
Dependent Claim
134 words
A portable radio communication apparatus having: a first antenna capable of being received in a housing of said apparatus; a second antenna disposed in said housing or on outer periphery of said housing; a duplexer; and a reception filter having a pass band which is a receive frequency band; in a condition wherein said first antenna is pulled out of said housing, an antenna terminal of said duplexer and said reception filter being connected to, respectively, said first and second antennas for effecting reception diversity; said apparatus comprising: a first switch for switching said antenna terminal of said duplexer from said first antenna to said second antenna when said first antenna is received in said housing; and a second switch for disconnecting said reception filter from said second antenna interlocked with said first switch.
Claim 20
Dependent Claim
134 words
A portable radio communication apparatus having: a first antenna capable of being received in a housing of said apparatus; a second antenna disposed in said housing or on outer periphery of said housing; a duplexer; and a reception filter having a pass band which is a receive frequency band; in a condition wherein said first antenna is pulled out of said housing, an antenna terminal of said duplexer and said reception filter being connected to, respectively, said first and second antennas for effecting reception diversity; said apparatus comprising: a first switch for switching said antenna terminal of said duplexer from said first antenna to said second antenna when said first antenna is received in said housing; and a second switch for disconnecting said reception filter from said second antenna interlocked with said first switch.
Claim 21
Independent Claim
115 words
A method of switching a first antenna of a portable radio communication apparatus, which includes a transmitter and a diversity receiver, capable of assuming a first condition wherein said first antenna does not protrude from a housing of said apparatus and a second condition wherein said first antenna protrudes from said housing, and a second antenna supported by said housing in such a manner as not to protrude from said housing, said method comprising the steps of: in the first condition, connecting said second antenna to said transmitter and diversity receiver; and in the second condition, connecting said first antenna to said transmitter and diversity receiver while connecting said second antenna to said diversity receiver.
Claim 22
Independent Claim
115 words
A method of switching a first antenna of a portable radio communication apparatus, which includes a transmitter and a diversity receiver, capable of assuming a first condition wherein said first antenna does not protrude from a housing of said apparatus and a second condition wherein said first antenna protrudes from said housing, and a second antenna supported by said housing in such a manner as not to protrude from said housing, said method comprising the steps of: in the first condition, connecting said second antenna to said transmitter and diversity receiver; and in the second condition, connecting said first antenna to said transmitter and diversity receiver while connecting said second antenna to said diversity receiver.
Claim 23
Dependent Claim
72 words
A method as claimed in claim 18, wherein connection of said second antenna to said transmitter and diversity receiver in the first condition and connection of said first antenna to said transmitter and diversity receiver in the second condition are performed through, respectively, a transmission filter and a first reception filter, and connection of said second antenna to said diversity receiver in the second condition is performed through a second reception filter.
Claim 24
Dependent Claim
44 words
A method as claimed in claim 18, wherein connection of said first and second antennas to said transmitter and diversity receiver occurs in response to a change of condition of said first antenna from one to the other of said first and second conditions.
Claim 25
Dependent Claim
30 words
A method as claimed in claim 18, wherein said first antenna is received in said housing in the first condition and pulled out of said housing in the second condition.
Claim 26
Dependent Claim
36 words
A method as claimed in claim 18, wherein said first antenna means comprises a whip antenna which is received in said housing in the first condition and pulled out of said housing in the second condition.
Claim 27
Dependent Claim
40 words
An apparatus as claimed in claim 18, wherein said first antenna means comprises a whip antenna which is folded along outer periphery of said housing in the first condition and unfolded to stand on said housing in the second condition.
Claim 28
Dependent Claim
22 words
An apparatus as claimed in claim 18, wherein said second antenna means comprises a microstrip antenna which is built in said housing.
References Cited (Backward Citations)
No citation records indexed.
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