Patent US3823404A successfully refreshed from Google Patents.
US3823404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin sandwich telemetry antenna
Assignee: United States Department of the Army
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Filing: 1973-05-09
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Granted: 1974-07-09
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Expires: 1993-05-09
Abstract
Abstract A thin sandwich slot antenna is provided which produces a cardiod shaped antenna pattern. The antenna structure requires no antenna cavity or other remote structure behind the antenna. A thin-film antenna is supported by a thin dielectric strip and contoured to the shape of support structure. A metallic support structure becomes the ground plane for the antenna otherwise a metallic ground plane is placed behind the radiating element.
Inventors
- 👤 H Buie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:24
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H01Q13/106; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/286; H01Q13/20; H01Q13/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
A high frequency antenna for use at a wavelength lambda , including a thin film conductive sheet having parallel rectangular slots therein, said slots being separated by an elongated strip of said conductive sheet, said elongated strip being disposed for impedance coupling of radiant frequency energy, and said slots having equal lengths of 3/20 lambda and equal widths of 1/100 lambda .
Claim 2
Dependent Claim
62 words
A high frequency antenna for use at a wavelength lambda , including a thin film conductive sheet having parallel rectangular slots therein, said slots being separated by an elongated strip of said conductive sheet, said elongated strip being disposed for impedance coupling of radiant frequency energy, and said slots having equal lengths of 3/20 lambda and equal widths of 1/100 lambda .
Claim 3
Dependent Claim
53 words
An antenna as set forth in claim 1 wherein said slots are joined at one end by a gap which separates one end of said elongated strip from the remainder of the conductive sheet, and wherein the thin film dimensions are not more than 1/5 lambda in length and 3/50 lambda in width.
Claim 4
Dependent Claim
25 words
A high frequency antenna as set forth in claim 2 wherein said antenna is comprised of a copper foil not more than 0.01 inches thick.
Claim 5
Dependent Claim
20 words
The antenna as set forth in claim 3 wherein said elongated strip is approximately the same width as said slots.
Claim 6
Dependent Claim
82 words
A high frequency transmitting and receiving antenna system for substantially conforming to the configuration of supporting substrate and comprising: a conductive foil antenna having parallel slots therein for receiving and transmitting radiant energy, said slots having equal lengths of 3/20 lambda and equal widths of 1/100 lambda , thin film dielectric support means bonded to one surface of said conductive foil, a substrate support means and ground plane attached to said dielectric film and coupled to a portion of said antenna foil.
Claim 7
Dependent Claim
82 words
A high frequency transmitting and receiving antenna system for substantially conforming to the configuration of supporting substrate and comprising: a conductive foil antenna having parallel slots therein for receiving and transmitting radiant energy, said slots having equal lengths of 3/20 lambda and equal widths of 1/100 lambda , thin film dielectric support means bonded to one surface of said conductive foil, a substrate support means and ground plane attached to said dielectric film and coupled to a portion of said antenna foil.
Claim 8
Dependent Claim
37 words
An antenna system as set forth in claim 5 and further comprising an elongated strip of said antenna foil being disposed between adjacent slots for coupling radiant energy thereto and thereby developing radiant energy across said slots.
Claim 9
Dependent Claim
48 words
An antenna system as set forth in claim 6 wherein said substrate ground plane is the outer surface of a missile and said antenna foil is fixably disposed along a contoured surface thereof for radiating or receiving energy from a selected direction with respect to the missile axis.
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |