Patent US4039975A successfully refreshed from Google Patents.
US4039975A
Expired / Lapsed
US
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E plane folded hybrid with coaxial difference port
Assignee: SEDCO SYSTEMS Inc
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Filing: 1976-04-12
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Granted: 1977-08-02
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Expires: 1996-04-12
Abstract
Abstract An E plane folded hybrid for use in waveguide circuits has a coaxial difference port. The hybrid design is particlarly useful for applications using half-height or ridge waveguide wherein the junction region of the hybrid is of insufficient size to provide a waveguide difference port.
Inventors
- 👤 Thomas R. Debski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:13
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/19; H01P5/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
An E-plane folded hybrid comprising a double ridge waveguide, a first end of said waveguide forming an input port, an H-plane bifurcation extending partially into said waveguide from a second end, said bifurcation forming first and second single ridge waveguide colinear ports, each having an internal cross-section corresponding to half the cross-section of said double ridge waveguide, a coaxial difference port formed in the E-plane wall of said waveguide and having an outer conductor connected to said waveguide wall and an inner conductor connected to said bifurcation.
Claim 2
Dependent Claim
87 words
An E-plane folded hybrid comprising a double ridge waveguide, a first end of said waveguide forming an input port, an H-plane bifurcation extending partially into said waveguide from a second end, said bifurcation forming first and second single ridge waveguide colinear ports, each having an internal cross-section corresponding to half the cross-section of said double ridge waveguide, a coaxial difference port formed in the E-plane wall of said waveguide and having an outer conductor connected to said waveguide wall and an inner conductor connected to said bifurcation.
Claim 3
Dependent Claim
67 words
An E-plane folded hybrid as specified in claim 1 wherein said difference port is provided with a coaxial to ridge waveguide transition comprising a ridge waveguide section having a first ridge connected to the adjacent wall of said waveguide, and a second ridge insulated from the adjacent wall of said waveguide over a portion of said section, and connected to the center conductor of said difference port.
Claim 4
Dependent Claim
30 words
A hybrid in accordance with claim 1 wherein said inner conductor is connected to said bifurcation by an L shaped septum, which is substantially in the plane of said bifurcation.
Claim 5
Dependent Claim
26 words
An E-plane folded hybrid as specified in claim 3 wherein there are provided transverse ridges on the H-plane walls of said waveguide adjacent said L-shaped septum.
Claim 6
Dependent Claim
30 words
An E-plane folded hybrid as specified in claim 1 wherein said colinear ports are provided with tapered sections to transform said single ridge waveguide ports to double ridge waveguide ports.
Claim 7
Dependent Claim
29 words
An E-plane folded hybrid as specified in claim 5 wherein said input port is provided with a transformer thereby to provide a hybrid with identical input and colinear ports.
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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |