US4700190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Missile decoy radar cross section enhancer
Assignee: United States Department of the Air Force
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Filing: 1979-10-17
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Granted: 1987-10-13
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Expires: 1999-10-17
Abstract
Abstract A decoy missile having the shape of a reentry vehicle and containing a pair of conically shaped dipole jacks in tandem, the jacks are shaped and spaced to provide a desired reflective cross section at a specific frequency, the rear cover plate of the decoy is constructed of radar absorbing material to aid in the enhancement process.
Inventors
- 👤 John J. Harrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:23
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/281; H01Q15/00; H01Q15/0006; H01Q15/0013; H01Q15/14; H01Q17/00; H01Q17/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A missile decoy with radar cross section enhancing means comprising, a generally conical shaped housing formed of teflon coated fiberglass, the smaller end thereof being closed with a conductive tip and the larger end thereof being closed with an aluminum plate, said aluminum plate being covered internally with radar absorbing material, first and second antennas positioned within the housing in a series relationship, each said antenna being comprised of a stem with two dipole elements affixed thereto at an angle of approximately 25° with the stem's longitudinal axis and orthogonally to each other, the stems of said first and second antennas being aligned with the longitudinal axis of said housing, and low density low loss foam means to support said antennas within said housing means.
Claim 2
Dependent Claim
125 words
A missile decoy with radar cross section enhancing means comprising, a generally conical shaped housing formed of teflon coated fiberglass, the smaller end thereof being closed with a conductive tip and the larger end thereof being closed with an aluminum plate, said aluminum plate being covered internally with radar absorbing material, first and second antennas positioned within the housing in a series relationship, each said antenna being comprised of a stem with two dipole elements affixed thereto at an angle of approximately 25° with the stem's longitudinal axis and orthogonally to each other, the stems of said first and second antennas being aligned with the longitudinal axis of said housing, and low density low loss foam means to support said antennas within said housing means.
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) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |