Patent US3413642A successfully refreshed from Google Patents.
US3413642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual mode antenna
Assignee: AT&T Inc
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Filing: 1966-05-05
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Granted: 1968-11-26
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Expires: 1986-05-05
Abstract
No abstract record available.
Inventors
- 👤 John S Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:28
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/02; H01Q13/0208; H01Q13/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A DUAL MODE ANTENNA COMPRISING A HOLLOW CONDUCTIVELY BOUNDED GUIDING STRUCTURE HAVING AN INPUT PORTION AND AN OUTPUT PORTION WITH A CENTRAL AXIS OF PROPAGATION, SAID STRUCTURE BEING ADAPTED TO SUPPORT THE TE11 AND TM11 WAVE MODES SIMULTANEOUSLY ALONG AT LEAST SAID OUTPUT PORTION, MODE CONVERSION MEANS COMPRISING A PLURALITY CLOSELY SPACED DISCONTINUITIES DISPOSED WITHIN SAID STRUCTURE, AND MEANS FOR APPLYING ENERGY IN THE TE11 WAVE MODE TO SAID INPUT PORTION, SAID DISCONTINUITIES CAUSING CONVERSION OF A PORTION OF SAID ENERGY TO THE TM11 WAVE MODE.
Claim 2
Dependent Claim
86 words
A DUAL MODE ANTENNA COMPRISING A HOLLOW CONDUCTIVELY BOUNDED GUIDING STRUCTURE HAVING AN INPUT PORTION AND AN OUTPUT PORTION WITH A CENTRAL AXIS OF PROPAGATION, SAID STRUCTURE BEING ADAPTED TO SUPPORT THE TE11 AND TM11 WAVE MODES SIMULTANEOUSLY ALONG AT LEAST SAID OUTPUT PORTION, MODE CONVERSION MEANS COMPRISING A PLURALITY CLOSELY SPACED DISCONTINUITIES DISPOSED WITHIN SAID STRUCTURE, AND MEANS FOR APPLYING ENERGY IN THE TE11 WAVE MODE TO SAID INPUT PORTION, SAID DISCONTINUITIES CAUSING CONVERSION OF A PORTION OF SAID ENERGY TO THE TM11 WAVE MODE.
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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |