Patent US3560886A successfully refreshed from Google Patents.
US3560886A
Expired / Lapsed
US
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Variable coupling microstrip parallel-line directional coupler
Assignee: Westinghouse Electric Corp
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Filing: 1969-03-24
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Granted: 1971-02-02
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Expires: 1989-03-24
Abstract
Abstract DESCRIBED IS A NOVEL VARIABLE COUPLING, DIRECTIONAL COUPLER EMPLOYING MICROSTRIP TRANSMISSION LINES ON A SEMICONDUCTIVE SUBSTRATE. VARIABLE COUPLING IS ACHIEVED BY THE PROVISION OF A DISTRIBUTED P-N JUNCTION IN THE COUPLING REGION OF THE SEMICONDUCTIVE SUBSTANCE OF A MICROSTRIP QUARTER-WAVELENGTH PARALLEL-LINE DIRECTIONAL COUPLER. BY PROPER VARIATION OF A BIAS POTENTIAL ACROSS THE P-N JUNCTION, THE DEPLETION-LAYER CAPACITANCE OF THE JUNCTION CAN BE ALTERED. THIS VARIATION IN CAPITANCE WITH VARIATION IN BIAS ALTERS THE TOTAL COUPLING CAPACITANCE BETWEEN THE PARALLEL MICROSTRIP TRANSMISSION LINES AND, HENCE, ALTERS THE ELECTROMAGNETIC ENERGY COUPLED.
Inventors
- 👤 Herbert Warren Cooper
- 👤 Robert Q Macleay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:59
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/04; H10; H10D; H10D84/00; H10D99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |