US3305870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual mode horn antenna
Assignee: Individual
•
Filing: 1963-08-12
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Granted: 1967-02-21
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Expires: 1983-08-12
Abstract
No abstract record available.
Inventors
- 👤 James E Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:12
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
132 words
IN COMBINATION: A CIRCULAR WAVEGUIDE HAVING AN INPUT END AND AN OUTPUT END; MEANS FOR FEEDING ELECTROMAGNETIC WAVE ENERGY IN THE TE11 MODE INTO SAID INPUT END OF SAID CIRCULAR WAVEGUIDE; MEANS CONNECTED TO THE OUTPUT END OF SAID WAVEGUIDE FOR CONVERTING A PORTION OF SAID TE11 MODE ENERGY IN SAID CIRCULAR WAVEGUIDE TO TM11 MODE ENERGY, SAID MEANS COMPRISING A TRANSITION SECTION OF WAVEGUIDE HAVING A DIAMETER LARGER THAN SAID CIRCULAR WAVEGUIDE; AND A CONICAL HORN ANTENNA CONNECTED TO THE OUTPUT END OF SAID TRANSITION SECTION, THE LENGTH AND THE DIAMETER OF SAID TRANSITION SECTION AND THE LENGTH AND FLARE ANGLE OF SAID CONICAL HORN ANTENNA BEING CHOSEN SO THAT THE MAIN BEAM EMANATING INTO FREE SPACE FROM SAID HORN ANTENNA OF BOTH SAID TE11 AND TM11 MODES ARE IN PHASE.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |