US4162499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush-mounted piggyback microstrip antenna
Assignee: United States Department of the Army
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Filing: 1977-10-26
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Granted: 1979-07-24
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Expires: 1997-10-26
Abstract
Abstract A dual radiating system where one radiating element is placed atop the ot in a piggyback fashion. The elements can be a pair of microstrip or dielectric-loaded parallel plate radiators, or it can be a combination of the two. Separate coaxial lines feed each of the radiators, and there is a minimum of coupling from one antenna to another. The antenna can be used alone or more effectively in a linear or planar conformal array.
Inventors
- 👤 Howard S. Jones, Jr.
- 👤 Frederick G. Farrar
- 👤 Daniel H. Schaubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:38
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/0414; H01Q5/00; H01Q5/40; H01Q5/42
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A piggyback radiating system which comprises: p1 a ground plane; a first radiating element which is flush mounted above the ground plane; a second radiating element which is flush mounted over the first radiating element in an area where there is minimal current flow; a first coaxial feed means for feeding the first radiating element; and a second coaxial feed means for feeding the second radiating element, the outer conductor of the second feed means shorting the ground plane and the first radiating element, therefore serving as an impedance match to the first radiating element.
Claim 2
Dependent Claim
95 words
A piggyback radiating system which comprises: p1 a ground plane; a first radiating element which is flush mounted above the ground plane; a second radiating element which is flush mounted over the first radiating element in an area where there is minimal current flow; a first coaxial feed means for feeding the first radiating element; and a second coaxial feed means for feeding the second radiating element, the outer conductor of the second feed means shorting the ground plane and the first radiating element, therefore serving as an impedance match to the first radiating element.
Claim 3
Dependent Claim
40 words
The system, as set forth in claim 1, wherein the first radiating element has an electrical length of approximately λ/2 at its operating frequency and the second radiating element has an electrical length of approximately λ/4 at its operating frequency.
Claim 4
Dependent Claim
23 words
The system, as set forth in claim 2, wherein both radiating elements are wedge shaped in the plane parallel to the ground plane.
Claim 5
Dependent Claim
18 words
The system, as set forth in claim 1, wherein the first and second radiating elements are microstrip radiators.
Claim 6
Dependent Claim
20 words
The system, as set forth in claim 1, wherein the first and second radiating elements are dielectric-loaded parallel plate radiators.
Claim 7
Dependent Claim
23 words
The system, as set forth in claim 1, wherein the first radiating element and second radiating elements comprise microstrip and parallel plate radiators.
Claim 8
Dependent Claim
29 words
The system, as set forth in claim 1, wherein the second radiating element is a dielectric loaded parallel plate radiator and the first radiating element is a microstrip radiator.
Claim 9
Dependent Claim
52 words
The system, as set forth in claim 6, wherein the center conductor of the second feed means is fed to a portion of the second radiating element which is extended over the first radiating element so that the center conductor of the second means need not pass through the first radiating element.
Claim 10
Dependent Claim
24 words
The system, as set forth in claim 6, wherein the center conductor of the second feed means is fed completely through the microstrip radiator.
Claim 11
Dependent Claim
17 words
The system, as set forth in claim 9, wherein the dual radiators are set in an array.
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) | 1982-07-23 | 1983-01-22 | 1983-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-23 | 1987-01-22 | 1987-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-23 | 1991-01-22 | 1991-07-24 | $7700.00 | Window Closed / Lapsed |