US4187480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microstrip network having phase adjustment
Assignee: BAE Systems Aerospace Inc
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Filing: 1978-05-12
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Granted: 1980-02-05
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Expires: 1998-05-12
Abstract
Abstract In an array antenna system having a coupling network interconnecting a plurality of element groups, the coupling network is provided with phase adjustments to shift the angular location of the effective element radiation pattern. An effective technique for this phase adjustment in a microstrip coupling network makes use of a field altering structure positioned adjacent the microstrip.
Inventors
- 👤 Richard F. Frazita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:55
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/34; H01Q3/36; H01P; H01P1/00; H01P1/18; H01P1/184; H01Q3/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
96 words
A phase adjustable microstrip transmission line comprising: a ground plane; a dielectric substrate attached to said ground plane; a conductive strip attached to said substrate; and a conductive plate on the side of said strip away from said substrate and separated from said strip by a selected spacing and having a length in the direction of said conductive strip which corresponds to an integral number of half wave lengths of a signal on said microstrip to thereby vary the fields of signals on said microstrip so as to adjust the transmission phase of said transmission line.
Claim 2
Dependent Claim
96 words
A phase adjustable microstrip transmission line comprising: a ground plane; a dielectric substrate attached to said ground plane; a conductive strip attached to said substrate; and a conductive plate on the side of said strip away from said substrate and separated from said strip by a selected spacing and having a length in the direction of said conductive strip which corresponds to an integral number of half wave lengths of a signal on said microstrip to thereby vary the fields of signals on said microstrip so as to adjust the transmission phase of said transmission line.
Claim 3
Dependent Claim
19 words
A transmission line as specified in claim 1 wherein said conductive plate is electrically connected to said ground plane.
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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |