Patent US3238473A successfully refreshed from Google Patents.
US3238473A
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US
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Directional coupler having plural slanted identical coupling slots of critical length
Assignee: Microwave Development Laboratories Inc
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Filing: 1961-11-28
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Granted: 1966-03-01
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Expires: 1981-11-28
Abstract
No abstract record available.
Inventors
- 👤 Salzberg Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:15
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/18; H01P5/181; H01P5/182
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A DIRECTIONAL COUPLER OF THE TYPE EMPLOYING RECTANGULAR WAVEGUIDES HAVING A COMMON WALL IN WHICH A SERIES OF APERTURES ARE PROVIDED PERMITTING ENERGY TO COUPLE FROM ONE WAVEGUIDE TO ANOTHER, THE APERTURES BEING ELONGATED SLOTS OF IDENTICAL CONFIGURATION, THE GEOMETRIC CENTERS OF THE SLOTS BEING SPACED AT REGULAR INTERVALS ALONG THE LENGTH OF THE COMMON WALL, LONGITUDINAL AXIS OF EACH SLOT BEING INCLINED AT AN ANGLE WITH RESPECT TO A LINE PASSING THE SLOT''S CENTER NORMAL TO THE BOARD WALLS OF THE WAVEGUIDES, THE LENGTH OF EACH SLOT BEING BETWEEN 3/8 AND 7/16 OF THE WAVELENGTH AT FH, AND THE TERMINAL SLOTS OF THE SERIES BEING LESS INCLINED THAN THE OTHER SLOTS OF THE SERIES.
Claim 2
Dependent Claim
115 words
A DIRECTIONAL COUPLER OF THE TYPE EMPLOYING RECTANGULAR WAVEGUIDES HAVING A COMMON WALL IN WHICH A SERIES OF APERTURES ARE PROVIDED PERMITTING ENERGY TO COUPLE FROM ONE WAVEGUIDE TO ANOTHER, THE APERTURES BEING ELONGATED SLOTS OF IDENTICAL CONFIGURATION, THE GEOMETRIC CENTERS OF THE SLOTS BEING SPACED AT REGULAR INTERVALS ALONG THE LENGTH OF THE COMMON WALL, LONGITUDINAL AXIS OF EACH SLOT BEING INCLINED AT AN ANGLE WITH RESPECT TO A LINE PASSING THE SLOT''S CENTER NORMAL TO THE BOARD WALLS OF THE WAVEGUIDES, THE LENGTH OF EACH SLOT BEING BETWEEN 3/8 AND 7/16 OF THE WAVELENGTH AT FH, AND THE TERMINAL SLOTS OF THE SERIES BEING LESS INCLINED THAN THE OTHER SLOTS OF THE SERIES.
References Cited (Backward Citations)
CA604912A
Cited
US2573746A
Cited
US2676257A
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US2820203A
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US2932823A
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US2976499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |