Patent US3758879A successfully refreshed from Google Patents.
US3758879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable directional coupler
Assignee: International Standard Electric Corp
•
Filing: 1972-08-30
•
Granted: 1973-09-11
•
Expires: 1992-08-30
Abstract
Abstract This invention relates to a microwave directional coupler, having an easily adjustable coupling coefficient. In a short-slot hybrid junction comprising two adjacent waveguide sections having a common sidewall with a coupling slot, two dielectric slabs having their planes parallel to the common wall plane are disposed, in front of the slot, respectively in the two waveguide sections and symmetrically with respect to the common wall. Variations of the coupling coefficient are obtained by moving symmetrically the two slabs in a direction perpendicular to the common wall. This solution preserves the decoupling and matching characteristics of the coupler.
Inventors
- 👤 D Beguin
- 👤 B Chiron
- 👤 M Cuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:07
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/04; H01P5/12; H01P5/16; H01P5/18; H01P5/181; H01P5/182
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
An improved directional sidewall coupler of the type wherein first and second waveguide sections having a sidewall as a common wall are provided with a coupling slot, wherein the improvement comprises: first and second dielectric slabs positioned within said first and second waveguide sections, respectively, symmetrically with respect to said common wall in front of said coupling slot, and having planes which are parallel to said common wall; and means for positioning the plane positions of said slabs with respect to said common wall.
Claim 2
Dependent Claim
84 words
An improved directional sidewall coupler of the type wherein first and second waveguide sections having a sidewall as a common wall are provided with a coupling slot, wherein the improvement comprises: first and second dielectric slabs positioned within said first and second waveguide sections, respectively, symmetrically with respect to said common wall in front of said coupling slot, and having planes which are parallel to said common wall; and means for positioning the plane positions of said slabs with respect to said common wall.
Claim 3
Dependent Claim
14 words
A coupler according to claim 1, wherein said first and second slabs are trapezoid-shaped.
Claim 4
Dependent Claim
27 words
A coupler according to claim 2, wherein said positioning means include plastic feet fixed to waveguide section walls between which said first and second slabs are forced.
Claim 5
Dependent Claim
28 words
A coupler according to claim 1, further including means for enabling said first and second slabs to be moved symmetrically along an axis normal to said common wall.
Claim 6
Dependent Claim
23 words
A coupler according to claim 1, wherein the transverse thickness of said slabs is controlled so as to produce a desired coupling coefficient.
References Cited (Backward Citations)
US2739287A
Cited
US3075158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |