US4331961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windshield antenna
Assignee: Individual
•
Filing: 1980-04-08
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Granted: 1982-05-25
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Expires: 2000-04-08
Abstract
Abstract The coupling of radio signals, to and from the surface of a conductive body and to and from associated radio apparatus is optimized by adding, proximate to the edge of an opening (such as a window) in the body, a closed loop of relatively highly conductive material, such as copper, and coupling said radio signals to said associated radio apparatus through a plurality of interconnected adjacent loops proximate to said closed loop to maintain proper proportion of E fields and H fields in the signals fed to associated radio apparatus.
Inventors
- 👤 Ross A. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:22
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/1271
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
88 words
A conductive-body antenna system responsive to both E-field and H-field components of radio signals, including: an electrically conductive body having at least one opening therein to form a conductive edge, a closed exciter loop member of material having good electrical conductivity positioned adjacent to said conductive edge along substantially its entire length and coupled closely thereto for R-F purposes; at least one driven loop positioned within said closed exciter loop member and coupled thereto for R-f purposes; and, means for coupling said driven loop to external radio apparatus.
Claim 2
Dependent Claim
88 words
A conductive-body antenna system responsive to both E-field and H-field components of radio signals, including: an electrically conductive body having at least one opening therein to form a conductive edge, a closed exciter loop member of material having good electrical conductivity positioned adjacent to said conductive edge along substantially its entire length and coupled closely thereto for R-F purposes; at least one driven loop positioned within said closed exciter loop member and coupled thereto for R-f purposes; and, means for coupling said driven loop to external radio apparatus.
Claim 3
Dependent Claim
16 words
Apparatus according to claim 1 in which said driven loop is tuned to an operating frequency.
Claim 4
Dependent Claim
36 words
Apparatus according to claim 1 in which the number of driven loops is two, they are open loops and the conductor in one driven loop is wound oppositely to the conductor in the other driven loop.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 1 in which said driven loop includes multiple, parallel conductors.
Claim 6
Dependent Claim
16 words
Apparatus according to claim 1 in which said closed exciter loop is a hollow, conductive sheath.
Claim 7
Dependent Claim
35 words
Apparatus according to claim 5 in which the number of driven loops is two and each is wound in the opposite direction from the other and each originates from a common lead which is bi-furcated.
Claim 8
Dependent Claim
20 words
Apparatus according to claim 6 in which the first turn of each driven loop passes through said hollow, conductive sheath.
Claim 9
Dependent Claim
18 words
Apparatus according to claim 7 which includes, in addition, a defroster coupled to each of said driven loops.
Claim 10
Dependent Claim
27 words
Apparatus according to claim 3 in which the open ends of said open driven loops are connected to each other and are coupled to an output coax.
Claim 11
Dependent Claim
23 words
Apparatus according to claim 3 in which the open ends of said open loops are connected to each other and to R-F ground.
Claim 12
Dependent Claim
31 words
Apparatus according to claim 1 in which said closed exciter loop member is connected with low-electrical resistance-material to said conductive edge in the region of the top and bottom center thereof.
Claim 13
Dependent Claim
17 words
Apparatus according to claim 1 in which said conductive edge has a bonded surface of high-electrical-conductivity material.
References Cited (Backward Citations)
US3971030A
Cited
US3971029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |