Patent US3071729A successfully refreshed from Google Patents.
US3071729A
Expired / Lapsed
US
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Microwave mixer for mutually orthogonal waveguide modes
Assignee: Varian Medical Systems Inc
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Filing: 1961-02-16
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Granted: 1963-01-01
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Expires: 1981-02-16
Abstract
No abstract record available.
Inventors
- 👤 Bernard M Schiffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:13
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0616; H03D9/0625
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A MICROWAVE MIXER COMPRISING: A RECTANGULAR WAVEGUIDE SECTION CAPABLE OF SUPPORTING A PAIR OF ORTHOGONALLY POLARIZED DOMINANT ELECTRIC WAVEGUIDE MODES ESTABLISHED BY FIRST AND SECOND WAVES PROPAGATING, RESPECTIVELY, THROUGH A PAIR OF JUNCTION CONNECTIONS ADJOINING SAID SECTION, THE JUNCTION CONNECTION FOR SAID FIRST WAVE CONSISTING OF A SINGLE MODE WAVEGUIDE COUPLED TO ONE END OF SAID ORTHOGONAL MODE WAVEGUIDE SECTION THROUGH A STEP TRANSITION AT WHICH DIMENSION OF SAID WAVEGUIDE SECTION TRANSVERSE TO THE POLARIZATION DIRECTION OF SAID FIRST WAVE IS SUBSTANTIALLY LESS THAN THE WIDTH OF SAID CONNECTING WAVEGUIDE; A PAIR OF COLLINEARLY DISPOSED DIODES EXTENDING INWARDLY FROM OPPOSED PORTIONS OF THE WALL OF SAID WAVEGUIDE SECTION IN THE POLARIZATION DIRECTION OF SAID FIRST WAVE; AND MEANS FOR PERTURBING THE MODE ESTABLISHED BY SAID SECOND WAVE SO THAT THE ELECTRIC FIELD THEREOF EXTENDS IN AN OPPOSITE DIRECTION ALONG THE AXIS OF EACH DIODE.
Claim 2
Dependent Claim
144 words
A MICROWAVE MIXER COMPRISING: A RECTANGULAR WAVEGUIDE SECTION CAPABLE OF SUPPORTING A PAIR OF ORTHOGONALLY POLARIZED DOMINANT ELECTRIC WAVEGUIDE MODES ESTABLISHED BY FIRST AND SECOND WAVES PROPAGATING, RESPECTIVELY, THROUGH A PAIR OF JUNCTION CONNECTIONS ADJOINING SAID SECTION, THE JUNCTION CONNECTION FOR SAID FIRST WAVE CONSISTING OF A SINGLE MODE WAVEGUIDE COUPLED TO ONE END OF SAID ORTHOGONAL MODE WAVEGUIDE SECTION THROUGH A STEP TRANSITION AT WHICH DIMENSION OF SAID WAVEGUIDE SECTION TRANSVERSE TO THE POLARIZATION DIRECTION OF SAID FIRST WAVE IS SUBSTANTIALLY LESS THAN THE WIDTH OF SAID CONNECTING WAVEGUIDE; A PAIR OF COLLINEARLY DISPOSED DIODES EXTENDING INWARDLY FROM OPPOSED PORTIONS OF THE WALL OF SAID WAVEGUIDE SECTION IN THE POLARIZATION DIRECTION OF SAID FIRST WAVE; AND MEANS FOR PERTURBING THE MODE ESTABLISHED BY SAID SECOND WAVE SO THAT THE ELECTRIC FIELD THEREOF EXTENDS IN AN OPPOSITE DIRECTION ALONG THE AXIS OF EACH DIODE.
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |