Patent US3790949A successfully refreshed from Google Patents.
US3790949A
Expired / Lapsed
US
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Survivable ground antenna system
Assignee: Individual
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Filing: 1972-12-13
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Granted: 1974-02-05
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Expires: 1992-12-13
Abstract
Abstract A survivable ground antenna system which relies upon its location within the earth for protection from natural or man-made forces. The antenna system utilizes a ''''point source'''' feed located within a main reflector in conjunction with a subreflector for communicating with a target. The feed is adjustably mounted therein and capable of operation even though located beneath the surface of the ground.
Inventors
- 👤 T Mcgraw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:55
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/18; H01Q1/00; H01Q1/04; H01Q19/19
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
93 words
A survivable ground antenna system comprising a rigid supporting cup embedded within the ground, a main reflecting means mounted within said supporting cup, at least one aperture located within said main reflecting means and said supporting cup rEspectively, said aperture in said main reflecting means being aligned with said aperture in said supporting cup, means for communicating with a target adjustably mounted within said aligned pair of apertures and a means for protecting said communicating means secured to said reflecting means whereby said antenna system is capable of operation during adverse environmental conditions.
Claim 2
Dependent Claim
93 words
A survivable ground antenna system comprising a rigid supporting cup embedded within the ground, a main reflecting means mounted within said supporting cup, at least one aperture located within said main reflecting means and said supporting cup rEspectively, said aperture in said main reflecting means being aligned with said aperture in said supporting cup, means for communicating with a target adjustably mounted within said aligned pair of apertures and a means for protecting said communicating means secured to said reflecting means whereby said antenna system is capable of operation during adverse environmental conditions.
Claim 3
Dependent Claim
23 words
A survivable ground antenna system as defined in claim 1 wherein said main reflecting means is in the form of a hemispheric reflector.
Claim 4
Dependent Claim
26 words
A survivable ground antenna system as defined in claim 2 wherein said communicating means is fixedly secured to a plate moveably mounted within said hemispheric reflector
Claim 5
Dependent Claim
37 words
A survivable ground antenna system as defined in claim 3 further comprising an rf-transparent support secured at one end to said plate and a subreflector secured to the other end of said support opposite said communicating means.
Claim 6
Dependent Claim
22 words
A survivable ground antenna system as defined in claim 4 further comprising a means for locking said communicating means securely in place.
Claim 7
Dependent Claim
37 words
A survivable ground antenna system as defined in claim 5 wherein a hole is located at the bottom of said main reflector and said supporting cup providing an outlet for debris inadvertantly collected in said main reflector.
Claim 8
Dependent Claim
22 words
A survivable ground antenna system as defined in claim 6 wherein said communicating means is in the form of a ''''point-source'''' feed.
Claim 9
Dependent Claim
23 words
A survivable ground antenna system as defined in claim 7 wherein said means for protecting said communicating means is an rf-transparent domed cover.
Claim 10
Dependent Claim
19 words
A survivable ground antenna system as defined in claim 8 wherein a hydraulic system adjustably mounts said communicating means.
Claim 11
Dependent Claim
19 words
A survivable ground antenna system as defined in claim 9 further comprising a grounded fence surrounding said domed cover.
References Cited (Backward Citations)
US3167776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |