EP0180462A2
Expired / Lapsed
EP
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Automobile antenna system
Assignee: Toyota Motor Corp
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Filing: 1985-10-29
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Granted: —
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Expires: 2005-10-29
Abstract
Abstract 57 The present invention provides an automobile antenna system capable of receiving radio waves without need of an externally projecting part such as a pole type antenna externally exposed from the vehicle body, the automobile antenna system including a high-frequency pick-up disposed on the marginal portion of an engine hood or trunk lid on the vehicle body such that the length of the pick-up is parallel to the longitudinal axis of the engine marginal edge of the engine hood or trunk lid, whereby surface high-frequency currents induced on the vehicle body by radio waves and concentrically flowing on the marginal portion of the engine hood or trunk lid can be detected by the pick-up.
Inventors
- 👤 Junzo Ohe
- 👤 Hiroshi Kondo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 22:12
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/32; H01Q1/325; H01Q1/3275
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
An automobile antenna system comprising high-frequency pick-up means disposed on the vehicle body in close proximity to the marginal portion of an engine hood or trunk lid such that the length of said pick-up means will be parallel to the marginal edge of said engine hood or trunk lid, said pick-up means being adapted to detect surface high-frequency currents induced on the vehicle body by radio waves and concentrically flowing on the marginal portion of the engine hood or trunk lid.
Claim 2
Dependent Claim
81 words
An automobile antenna system comprising high-frequency pick-up means disposed on the vehicle body in close proximity to the marginal portion of an engine hood or trunk lid such that the length of said pick-up means will be parallel to the marginal edge of said engine hood or trunk lid, said pick-up means being adapted to detect surface high-frequency currents induced on the vehicle body by radio waves and concentrically flowing on the marginal portion of the engine hood or trunk lid.
Claim 3
Dependent Claim
106 words
An automobile antenna system as defined in claim 1 wherein said pick-up means is mounted on the engine hood or trunk lid at at least one of four corners and central portion thereof on the side of the passenger room of the vehicle body such that the length of said pick-up means will be arranged parallel and in close proximity to the marginal edge of the engine hood or trunk lid, said pick-up means being adapted to detect surface high-frequency currents induced on the vehicle body by radio waves and concentrically flowing on the marginal portion of the engine hood or trunk lid with less noise.
Claim 4
Dependent Claim
54 words
An automobile antenna system as defined in claim 1 wherein said pick-up means is located at a position spaced inwardly away from the marginal edge of the engine hood or trunk lid within a distance defined by: where c is the velocity of light and f is a carrier frequency of the radio waves.
Claim 5
Dependent Claim
23 words
An automobile antenna system as defined in claim 1 wherein said pick-up means is in the form of an electromagnetic coupling type pick-up.
Claim 6
Dependent Claim
61 words
An automobile antenna system as defined in claim 4 wherein said pick-up means is mounted on the marginal portion of the trunk lid faced to a rear tray panel on the vehicle body and wherein said pick-up means comprises a loop antenna contained therein and arranged so that the length thereof is parallel to the longitudinal axis of the trunk lid.
Claim 7
Dependent Claim
43 words
An automobile antenna system as defined in claim 4 wherein said pick-up means comprises a case of electrically conductive material which contains said loop antenna and a peripheral circuit section, said case including an opening formed therein and faced to the trunk lid.
Claim 8
Dependent Claim
60 words
An automobile antenna system as defined in claim 6 wherein said loop antenna is in the form of a single-winding type antenna positioned along the inwardly turned margin of the trunk lid, said antenna being covered by an insulating material such that it can electrically be separated from the trunk lid and positioned in close contact with the trunk lid.
Claim 9
Dependent Claim
23 words
An automobile antenna system as defined in claim 1 wherein said pick-up means is in the form of an electrostatic coupling type pick-up.
Claim 10
Dependent Claim
75 words
An automobile antenna system as defined in claim 8 wherein said pick-up means comprises detection electrode means disposed on the marginal portion of a metallic vehicle closure member parallel to the longitudinal axis thereof and through an air gap or insulation plate to form an electrostatic capacity between the surface of said metallic closure member and said electrode means, whereby surface high-frequency currents can be detected by said detection electrode means through said electrostatic capacity.
References Cited (Backward Citations)
No citation records indexed.
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