Patent US5021796A successfully refreshed from Google Patents.
US5021796A
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Broad band, polarization diversity monopulse antenna
Assignee: United States Department of the Navy
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Filing: 1971-01-15
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Granted: 1991-06-04
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Expires: 1991-01-15
Abstract
Abstract A broadband, polarization diversity, monopulse antenna comprising a body celed current array and radial arm-coupled log periodic loop antenna in combination with associated mode forming, beam forming and feed networks.
Inventors
- 👤 Robert G. Corzine
- 👤 Bruce E. Bolstad
- 👤 John S. Johantgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:05
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/06; H01Q21/20; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/281; H01Q21/24; H01Q21/245; H01Q25/00; H01Q25/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
101 words
A directional receiving antenna system for use in a vehicle for receiving electromagnetic signals comprising; a radiating structure constructed such that highest frequencies radiate from a point near one end of the structure and progressively lower frequencies radiate closer to the other end of the structure positioned in said vehicle; and another radiating structure located in said vehicle constructed such that the vehicle body itself forms an efficient radiating structure in the region where antenna aperture is less than 2/π wavelengths in diameter; said radiating structures cooperating to provide true continuous multi-octave microwave direction finding capability as the receiving antenna system.
Claim 2
Dependent Claim
101 words
A directional receiving antenna system for use in a vehicle for receiving electromagnetic signals comprising; a radiating structure constructed such that highest frequencies radiate from a point near one end of the structure and progressively lower frequencies radiate closer to the other end of the structure positioned in said vehicle; and another radiating structure located in said vehicle constructed such that the vehicle body itself forms an efficient radiating structure in the region where antenna aperture is less than 2/π wavelengths in diameter; said radiating structures cooperating to provide true continuous multi-octave microwave direction finding capability as the receiving antenna system.
Claim 3
Dependent Claim
22 words
A directional receiving antenna system as set forth in claim 1 wherein; said another radiating structure comprises a body canceled current array.
Claim 4
Dependent Claim
21 words
A directional receiving antenna system as set forth in claim 1; said first mentioned radiating structure is a log periodic loop.
Claim 5
Dependent Claim
23 words
A directional receiving antenna as set forth in claim 2 wherein; said body canceled current array comprises annular slots in said vehicle body.
References Cited (Backward Citations)
US3172113A
Cited
US3482248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |