US4707701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automobile antenna system
Assignee: Toyota Motor Corp
•
Filing: 1985-10-25
•
Granted: 1987-11-17
•
Expires: 2005-10-25
Abstract
Abstract An automobile antenna system for detecting currents induced in a vehicle body by broadcast waves and transmitting the detected current signals to a receiver located in the vehicle body is provided without externally projected antenna poles. The system comprises high-frequency pickup means longitudinally disposed along and in close proximity with the marginal edge portion of the vehicle body, the pickup means being effective to detect surface high-frequency currents which are induced on the vehicle body and concentrated into the marginal edge of the vehicle body, for example, a vehicle roof panel, a rearwindow frame or a vehicle fender. The pickup means is spaced away from the marginal edge of the vehicle body within a range represented by the following formula: 12×10 -3 c/f(m) where c=the velocity of light and f=the carrier frequency of broadcast waves.
Inventors
- 👤 Junzo Ohe
- 👤 Hiroshi Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:40
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
85 words
An automobile antenna system for detecting surface high-frequency currents which are induced on a vehicle body and concentrated into the marginal edge of the vehicle body, said antenna system comprising a high-frequency pickup longitudinally disposed along and in close proximity with the marginal edge portion of the vehicle body, said high-frequency pickup being spaced away from the marginal edge of the vehicle body within a range represented by the following formula: 12×10.sup.-3 c/f(m) where c=the velocity of light and f=the carrier frequency of broadcast waves.
Claim 2
Dependent Claim
85 words
An automobile antenna system for detecting surface high-frequency currents which are induced on a vehicle body and concentrated into the marginal edge of the vehicle body, said antenna system comprising a high-frequency pickup longitudinally disposed along and in close proximity with the marginal edge portion of the vehicle body, said high-frequency pickup being spaced away from the marginal edge of the vehicle body within a range represented by the following formula: 12×10.sup.-3 c/f(m) where c=the velocity of light and f=the carrier frequency of broadcast waves.
Claim 3
Dependent Claim
27 words
An automobile antenna system as defined in claim 1, the high-frequency pickup being disposed near the marginal portion of the rearward area of a vehicle roof panel.
Claim 4
Dependent Claim
30 words
An automobile antenna system as defined in claim 2, said high-frequency pickup including a metallic casing for externally shielding a magnetic flux and a loop antenna located within the casing.
Claim 5
Dependent Claim
47 words
An automobile antenna system as defined in claim 3, the casing of the high-frequency pickup being disposed within an opening provided on a rear window frame, an exposed portion of the loop antenna being located in close proximity with the open edge of the rear window frame.
Claim 6
Dependent Claim
42 words
An automobile antenna system as defined in claim 4, the loop antenna being in the form of a single wound coil covered with insulation, the coil being arranged in an electrically insulated relationship with and in contact with the rear window frame.
Claim 7
Dependent Claim
31 words
An automobile antenna system as defined in claim 1, the high-frequency pickup being disposed in a service hole of an inner header panel on the forward end of a roof panel.
Claim 8
Dependent Claim
25 words
An automobile antenna system as defined in claim 1, the high-frequency pickup is positioned inwardly away from the marginal edge portion of a vehicle fender.
References Cited (Backward Citations)
US2200674A
Cited
US2481978A
Cited
US2520986A
Cited
US2575471A
Cited
DE889618C
Cited
US2740113A
Cited
US2774811A
Cited
US3007164A
Cited
US2971191A
Cited
US2950479A
Cited
US3066293A
Cited
US2859441A
Cited
DE1131762B
Cited
US3210766A
Cited
US3364487A
Cited
DE1949828A1
Cited
US3611388A
Cited
US3728732A
Cited
DE7015306U
Cited
US3717876A
Cited
US3823403A
Cited
US3794997A
Cited
DE2425189A1
Cited
US3961330A
Cited
US3916413A
Cited
US3961292A
Cited
US3972048A
Cited
US4003056A
Cited
US4080603A
Cited
JPS5322418U
Cited
JPS5334826U
Cited
DE2733478A1
Cited
DE2745475A1
Cited
US4278980A
Cited
US4217591A
Cited
JPS5546617A
Cited
US4317121A
Cited
JPS56156031A
Cited
JPS56168441A
Cited
US4339827A
Cited
JPS5870640A
Cited
JPS5870642A
Cited
US4499606A
Cited
US4506267A
Cited
JPS60175221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |