US4584587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuneable antenna with inductive coupling at input
Assignee: IRELAND FRANK E
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Filing: 1983-09-02
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Granted: 1986-04-22
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Expires: 2003-09-02
Abstract
Abstract A whip antenna system for surface vehicles or the like. The antenna system's tuner has an LC tank circuit, into whose inductor is inserted a coil that is connected to the vehicle's transmitter/receiver, the coil being field coupled to the tank circuit's inductor. The inserted coil provides sufficient reactance that the vehicle need not serve as a counterpoise, thus providing an antenna of comparable size but electrically less close to the ground (i.e. one that has better "seeing"), and useable with non-metallic vehicles (e.g. fiberglass boats).
Inventors
- 👤 Frank E. Ireland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:57
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/06; H01Q9/14; H01Q9/145; H01Q9/16; H01Q9/20; H01Q9/24; H01Q9/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A voltage feed half wave or multiple of a half wave antenna system for use on nonconductive or conductive counterpoise comprising: a quarter wave matching stub including a tuned or tuneable capacitance and inductance in parallel, said capacitance comprising a skirt around said inductance; said quarter wave matching stub connected to one end of said half wave radiator to supply operating voltage; and an inductance coupling means for inductance coupling of said quarter wave matching stub to transfer voltage, said inductance coupling means mounted within said inductance and connectable to a transmitter or receiver.
Claim 2
Dependent Claim
94 words
A voltage feed half wave or multiple of a half wave antenna system for use on nonconductive or conductive counterpoise comprising: a quarter wave matching stub including a tuned or tuneable capacitance and inductance in parallel, said capacitance comprising a skirt around said inductance; said quarter wave matching stub connected to one end of said half wave radiator to supply operating voltage; and an inductance coupling means for inductance coupling of said quarter wave matching stub to transfer voltage, said inductance coupling means mounted within said inductance and connectable to a transmitter or receiver.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |