EP0272145A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Card-type radio receiver having slot antenna integrated with housing thereof
Assignee: NEC Corp
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Filing: 1987-12-18
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Granted: —
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Expires: 2007-12-18
Abstract
Abstract A miniature radio receiver, includes a metal plate (11) constituting part of the housing of the receiver, a conductive plate (12) facing the metal plate and smaller in width than the metal plate, a connecting plate (13) electrically connecting one end of the conductive plate and one end of the metal plate, circuit components (18) mounted on the portion of the metal plate which does not face the conductive plate, a cover (10) made of an insulating material and fixed to the metal plate while covering the circuit components, and a radio frequency circuit coupled to the conductive plate, whereby the metal plate, the conductive plate and the connecting plate constitute a slot antenna.
Inventors
- 👤 Toshihiro C/O Nec Corporation Mori
- 👤 Kazuyuki C/O Nec Corporation Tsunoda
- 👤 Masayoshi C/O Nec Saitama Ltd. Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 20:58
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/08; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/0421; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H04B1/38
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
109 words
A miniature radio receiver comprising: a metal plate constituting part of the housing of said receiver; a conductive plate facing said metal plate and smaller in width than said metal plate; a connecting plate electrically connecting one end of said conductive plate and one end of said metal plate circuit components mounted on that portion of said metal plate which does not face said conductive plate; a cover made of an insulating material and fixed to said metal plate while covering said circuit components; and a radio frequency circuit coupled to said conductive plate, whereby said metal plate, said conductive plate and said connecting plate constitute a slot antenna.
Claim 2
Dependent Claim
109 words
A miniature radio receiver comprising: a metal plate constituting part of the housing of said receiver; a conductive plate facing said metal plate and smaller in width than said metal plate; a connecting plate electrically connecting one end of said conductive plate and one end of said metal plate circuit components mounted on that portion of said metal plate which does not face said conductive plate; a cover made of an insulating material and fixed to said metal plate while covering said circuit components; and a radio frequency circuit coupled to said conductive plate, whereby said metal plate, said conductive plate and said connecting plate constitute a slot antenna.
Claim 3
Dependent Claim
28 words
A miniature radio receiver as claimed in claim 1, further comprising a dielectric interposed between said conductive plate and said metal plate and having a small dielectric constant.
Claim 4
Dependent Claim
23 words
A miniature radio receiver as claimed in claim 1, wherein said connecting plate includes a portion which is bulged in a thicknesswise direction.
Claim 5
Dependent Claim
50 words
A miniature radio receiver as claimed in claim 1, further comprising a capacitor which is connected to one end of said conductive plate which is opposite to said one end to which said connecting plate is connected, said capacitor being used for adjusting the operation frequency of said slot antenna.
Claim 6
Dependent Claim
20 words
A miniature radio receiver as claimed in claim 1, wherein said cover is fixed to said metal plate by screws.
Claim 7
Dependent Claim
24 words
A miniature radio receiver as claimed in claim 1, further comprising dressing paint which is applied to an outer surface of said metal plate.
Claim 8
Dependent Claim
24 words
A miniature radio receiver as claimed in claim 1, further comprising an extremely thin cover made of synthetic resin which encloses said metal plate.
Claim 9
Dependent Claim
64 words
In a miniature radio receiver having a slot antenna, said slot antenna comprising a metal plate; a conductive plate facing said metal plate and smaller in width than said metal plate; and a connecting plate electrically connecting one end of said metal plate and one end of said conductive plate part of said slot antenna constituting part of the housing of said radio receiver.
Claim 10
Dependent Claim
64 words
In a miniature radio receiver having a slot antenna, said slot antenna comprising a metal plate; a conductive plate facing said metal plate and smaller in width than said metal plate; and a connecting plate electrically connecting one end of said metal plate and one end of said conductive plate part of said slot antenna constituting part of the housing of said radio receiver.
Claim 11
Dependent Claim
24 words
A miniature radio receiver as claimed in claim 8, further comprising a dielectric which is interposed between said conductive plate and said metal plate.
Claim 12
Dependent Claim
18 words
A miniature radio receiver as claimed in claim 9, wherein said dielectric has a relatively small dielectric constant.
Claim 13
Dependent Claim
23 words
A miniature radio receiver as claimed in claim 8, wherein said connecting plate includes a portion which is bulged in a thicknesswise direction.
Claim 14
Dependent Claim
50 words
A miniature radio receiver as claimed in claim 8, further comprising a capacitor which is connected to one end of said conductive plate which is opposite to said one end to which said connecting plate is connected, said capacitor being used for adjusting the operation frequency of said slot antenna.
Claim 15
Dependent Claim
32 words
A miniature radio receiver as claimed in claim 8, further comprising paint which is applied to the outer surface of said part of said slot antenna which constitutes part of said housing.
Claim 16
Dependent Claim
42 words
A miniature radio receiver as claimed in claim 8, further comprising a radio frequency circuit which is connected to said conductive plate, said radio frequency circuit being mounted on that portion of said metal plate which does not face said conductive plate.
Claim 17
Dependent Claim
88 words
A miniature radio receiver comprising: a metal plate; a conductive plate facing said metal plate and smaller in width than said metal plate; a connecting plate electrically connecting one end of said metal plate and one end of said conductive plate; means for connecting the other end of said conductive plate to ground; a radio frequency circuit mounted on that portion of said metal plate which does not face said conductive plate; and means for feeding a radio signal from said conductive plate to said radio frequency circuit.
Claim 18
Dependent Claim
88 words
A miniature radio receiver comprising: a metal plate; a conductive plate facing said metal plate and smaller in width than said metal plate; a connecting plate electrically connecting one end of said metal plate and one end of said conductive plate; means for connecting the other end of said conductive plate to ground; a radio frequency circuit mounted on that portion of said metal plate which does not face said conductive plate; and means for feeding a radio signal from said conductive plate to said radio frequency circuit.
Claim 19
Dependent Claim
29 words
A miniature radio receiver as claimed in claim 15, further comprising a dielectric having a small dielectric constant which is interposed between said metal plate and said conductive plate.
Claim 20
Dependent Claim
24 words
A miniature radio receiver as claimed in claim 15, wherein said connecting plate is designed to maintain the mechanical strength of said conductive plate.
Claim 21
Dependent Claim
112 words
A miniature radio receiver comprising: a metal plate constituting part of the housing of said receiver; a conductive plate constituting another part of said housing and extending parallel to an end of said metal plate and smaller in width than said metal plate; a connecting plate electrically connecting one end of said metal plate and one end of said conductive plate; circuit components mounted on part of said metal plate which does not face said conductive plate a radio frequency circuit connected to said conductive plate with respect to a high frequency; and a cover made of an insulating material which is fixed to said metal plate while covering said circuit components.
Claim 22
Dependent Claim
112 words
A miniature radio receiver comprising: a metal plate constituting part of the housing of said receiver; a conductive plate constituting another part of said housing and extending parallel to an end of said metal plate and smaller in width than said metal plate; a connecting plate electrically connecting one end of said metal plate and one end of said conductive plate; circuit components mounted on part of said metal plate which does not face said conductive plate a radio frequency circuit connected to said conductive plate with respect to a high frequency; and a cover made of an insulating material which is fixed to said metal plate while covering said circuit components.
Claim 23
Independent Claim
87 words
A method of mounting an antenna on a thin miniature receiver, comprising the steps of: locating above a metal plate a conductive plate which faces said metal plate and is smaller in width than said metal plate; connecting one end of said conductive plate and one end of said metal plate by a conductive connecting plate; mounting a circuit part of said receiver on that portion of said metal plate which does not face said conductive plate; and connecting a radio frequency circuit to said conductive plate.
Claim 24
Independent Claim
87 words
A method of mounting an antenna on a thin miniature receiver, comprising the steps of: locating above a metal plate a conductive plate which faces said metal plate and is smaller in width than said metal plate; connecting one end of said conductive plate and one end of said metal plate by a conductive connecting plate; mounting a circuit part of said receiver on that portion of said metal plate which does not face said conductive plate; and connecting a radio frequency circuit to said conductive plate.
Claim 25
Dependent Claim
28 words
A method as claimed in claim 19, further comprising the step of interposing a dielectric having a small dielectric constant between said conductive plate and said metal plate.
Claim 26
Dependent Claim
30 words
A method as claimed in claim 19, further comprising the step of providing in said connecting plate a portion which is bulged in a thicknesswise direction of said connecting plate.
Claim 27
Dependent Claim
43 words
A method as claimed in claim 19, further comprising the step of connecting a capacitor to the other end of said conductive plate to which said connecting plate is not connected, said capacitor being used for tuning the operation frequency of said antenna.
References Cited (Backward Citations)
No citation records indexed.
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