US3568208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Varying propagation constant waveguide
Assignee: Raytheon Co
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Filing: 1968-10-22
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Granted: 1971-03-02
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Expires: 1988-10-22
Abstract
Abstract A phased array waveguide antenna system having a rotatable member with a plurality of discontinuities to adjust for the electrical parameters disposed along the longitudinal axis of the waveguide feed line. The rotatable member may be rotated continuously at varying rates of speed of, for example, one scan per second and pulsed as well as continuous energy signals may be propagated.
Inventors
- 👤 Burrell R Hatcher
- 👤 Troy E Plunk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:06
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/44; H01Q3/443; H01Q21/00; H01Q21/0006; H01Q21/0037; H01Q21/0043
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
A transmission line element for propagation of electromagnetic energy comprising: waveguiding conductive means defIning an outer conductor having substantially flat walls and a plurality of antenna radiating elements; a substantially flat vane member of a conductive material communicating with said antenna radiating elements and providing means for varying the propagation constant characteristics of said line to influence excitation of individual antenna radiating elements; said conducting member having a plurality of periodic discontinuities along the length thereof to define distributed shunt capacitances and series inductances; and means for rotation of said conductive member about the axis of said waveguiding means.
Claim 2
Dependent Claim
99 words
A transmission line element for propagation of electromagnetic energy comprising: waveguiding conductive means defIning an outer conductor having substantially flat walls and a plurality of antenna radiating elements; a substantially flat vane member of a conductive material communicating with said antenna radiating elements and providing means for varying the propagation constant characteristics of said line to influence excitation of individual antenna radiating elements; said conducting member having a plurality of periodic discontinuities along the length thereof to define distributed shunt capacitances and series inductances; and means for rotation of said conductive member about the axis of said waveguiding means.
Claim 3
Dependent Claim
89 words
In a phased array antenna system for propagation of electromagnetic energy: a section of transmission line having substantially flat outer conductor boundary wall surfaces; a plurality of antenna radiating elements arranged in at least one of said wall surfaces; means for varying the propagation constant characteristics of said transmission line disposed along its longitudinal axis; said means comprising a substantially flat conductive member defining periodic distributed capacitances in shunt and inductances in series throughout substantially its entire length; and means for rotation of said conductive member about its axis.
Claim 4
Dependent Claim
89 words
In a phased array antenna system for propagation of electromagnetic energy: a section of transmission line having substantially flat outer conductor boundary wall surfaces; a plurality of antenna radiating elements arranged in at least one of said wall surfaces; means for varying the propagation constant characteristics of said transmission line disposed along its longitudinal axis; said means comprising a substantially flat conductive member defining periodic distributed capacitances in shunt and inductances in series throughout substantially its entire length; and means for rotation of said conductive member about its axis.
Claim 5
Dependent Claim
105 words
An antenna transmission device comprising: a section of waveguide transmission line defined by substantially flat outer wall conductors and having a plurality of slot radiators in at least one wall; rotatable center conductor means for varying the propagation constant characteristics of said waveguide line to influence propagation of electromagnetic energy therethrough disposed along its longitudinal axis; said means comprising a substantially flat conductive vane member having a plurality of periodic discontinuities symmetrically disposed on opposing sides of said longitudinal axis; said discontinuities defining distributed shunt capacitances and series inductances throughout the length of said member; means for rotation of said conductive member about its axis.
Claim 6
Dependent Claim
105 words
An antenna transmission device comprising: a section of waveguide transmission line defined by substantially flat outer wall conductors and having a plurality of slot radiators in at least one wall; rotatable center conductor means for varying the propagation constant characteristics of said waveguide line to influence propagation of electromagnetic energy therethrough disposed along its longitudinal axis; said means comprising a substantially flat conductive vane member having a plurality of periodic discontinuities symmetrically disposed on opposing sides of said longitudinal axis; said discontinuities defining distributed shunt capacitances and series inductances throughout the length of said member; means for rotation of said conductive member about its axis.
Claim 7
Dependent Claim
21 words
An antenna transmission device according to claim 3 wherein said periodic discontinuities are defined asymmetrically with respect to said longitudinal axis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |