EP0523867A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Retractable antenna
Assignee: Nokia Mobile Phones UK Ltd
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Filing: 1992-06-24
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Granted: —
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Expires: 2012-06-24
Abstract
Abstract An antenna assembly comprises an elongate radiating element (11) movable between a retracted position and an extended position, and a substantially planar radiating element (12) extending transversely to the elongate element. The elongate element extends through an aperture (25) in the planar element. A pair of concentric conductors (9,10) provide coaxial feed to the radiating elements and the elongate element is slidably mounted within the inner conductor (9). In the retracted position the elongate element forms part of the coaxial feed to the planar element and is itself rendered inoperative as a radiator. The invention provides a compact and convenient dual antenna arrangement ideally suited for use in a portable cellular radio telephone.
Inventors
- 👤 Peter Sroka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 23:20
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: 12
Claim 1
Independent Claim
58 words
An antenna assembly comprising an elongate radiating means movable between a retracted position and an extended position, and a substantially planar radiating means extending transversely to the elongate radiating means, the elongate radiating means extending through said planar radiating means in the extended position, wherein the elongate radiating means is rendered inactive by movement to the retracted position.
Claim 2
Dependent Claim
47 words
An antenna assembly as claimed in claim 1, further comprising a pair of substantially concentric conductors providing coaxial feed means to said radiating means, wherein in the retracted position the elongate radiating means constitutes at least part of the coaxial feed means to the planar radiating means.
Claim 3
Dependent Claim
26 words
An antenna assembly as claimed in claim 2, wherein the elongate radiating means is slidably mounted within the inner conductor of the concentric pair of conductors.
Claim 4
Dependent Claim
30 words
An antenna assembly as claimed in claim 2 or claim 3, wherein the elongate radiating means is slidably mounted in a support, the concentric conductors being provided on said support.
Claim 5
Dependent Claim
44 words
An antenna assembly as claimed in any of the preceding claims, wherein means are provided at one end of the elongate radiating means which electrically couple said one end of the elongate radiating means to the inner conductor of the concentric pair of conductors.
Claim 6
Dependent Claim
48 words
An antenna assembly as claimed in claim 5, including coupling means provided at the other end of said elongate radiating means which electrically couple the planar radiating means to the central conductor of the concentric pair of conductors when the elongate radiating means is in the retracted position.
Claim 7
Dependent Claim
35 words
An antenna assembly as claimed in claim 6, wherein the coupling means at the other end of said elongate radiating means is in the form of a flange extending transversely to the elongate radiating means.
Claim 8
Dependent Claim
72 words
An antenna assembly as claimed in claim 7, wherein the planar radiating means comprises an aperture complementary to said flange, the flange being accommodated in said aperture so as to be electrically coupled to said planar radiating means when the elongate radiating means is in the retracted position, and the elongate radiating means extends through said aperture in the planar radiating means when the elongate radiating means is in the extended position.
Claim 9
Dependent Claim
27 words
An antenna assembly as claimed in any of the preceding claims, wherein the planar radiating means form part of an antenna of the planar inverted F type.
Claim 10
Dependent Claim
21 words
An antenna assembly as claimed in any of the preceding claims including impedance matching means associated with said elongate radiating means.
Claim 11
Dependent Claim
38 words
An antenna assembly as claimed in claim 10, including further impedance matching means associated with said planar radiating means, said further impedance matching means being rendered effective by movement of the elongate radiating means to the retracted position.
Claim 12
Dependent Claim
35 words
A portable radio transceiver comprising a housing enclosing transmitting and receiver circuitry, and an antenna assembly as claimed in any of the preceding claims, said antenna assembly being coupled to said transmitting and receiving circuitry.
References Cited (Backward Citations)
No citation records indexed.
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