US3312976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual frequency cavity backed slot antenna
Assignee: Smiths Interconnect Inc
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Filing: 1965-07-19
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Granted: 1967-04-04
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Expires: 1985-07-19
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:30
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H01Q13/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A UNIDIRECTIONAL MICROWAVE ANTENNA RADIATOR COMPRISING IN COMBINATION, (A) A SEMI-CYLINDRICAL CAVITY SUBSTANTIALLY ENCLOSED BY ELECTRICALLY CONDUCTIVE MATERIAL, (B) A SLOT OPENING IN TO SAID CAVITY ALONG THE DIAMETER OF SAID CAVITY AND ADJACENT A HIGH IMPEDANCE PORTION OF SAID CAVITY, AND (C) MEANS FOR INTRODUCING RADIO FREQUENCY ENERGY INTO SAID CAVITY AT A SELECTED LOWER IMPEDANCE POINT WITHIN SAID CAVITY, WHEREBY SAID RADIO FREQUENCY ENERGY RESONATES IN SAID CAVITY AND IS EMITTED THROUGH SAID HALF WAVE SLOT IN A DIRECTIONAL BEAM.
Claim 2
Dependent Claim
82 words
A UNIDIRECTIONAL MICROWAVE ANTENNA RADIATOR COMPRISING IN COMBINATION, (A) A SEMI-CYLINDRICAL CAVITY SUBSTANTIALLY ENCLOSED BY ELECTRICALLY CONDUCTIVE MATERIAL, (B) A SLOT OPENING IN TO SAID CAVITY ALONG THE DIAMETER OF SAID CAVITY AND ADJACENT A HIGH IMPEDANCE PORTION OF SAID CAVITY, AND (C) MEANS FOR INTRODUCING RADIO FREQUENCY ENERGY INTO SAID CAVITY AT A SELECTED LOWER IMPEDANCE POINT WITHIN SAID CAVITY, WHEREBY SAID RADIO FREQUENCY ENERGY RESONATES IN SAID CAVITY AND IS EMITTED THROUGH SAID HALF WAVE SLOT IN A DIRECTIONAL BEAM.
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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |