US3988702A
Expired / Lapsed
US
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Waveguide section for connecting rectangular waveguide with elliptical waveguide
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1975-06-02
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Granted: 1976-10-26
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Expires: 1995-06-02
Abstract
Abstract A connecting piece for connecting a rectangular waveguide with an elliptical waveguide is composed of a waveguide section having a rectangular cross section identical to that of the rectangular waveguide to be connected, the waveguide section being provided, in the center of at least one of its wide sides, with a cylindrical recess at a distance of 1/8 of the waveguide wavelength with respect to the center of its longitudinal dimension from the plane of connection with the elliptical waveguide, the length of the recess in the longitudinal direction of the waveguide section being less than 1/4 such wavelength and the depth of the recess being selected in dependence on its length to match the two connected waveguides over a broad frequency band.
Inventors
- 👤 Ernst Kaffenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:00
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/08; H01P5/082
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
136 words
A connecting device comprising a waveguide section for connecting a rectangular waveguide with a waveguide having an approximately elliptical cross section, wherein said waveguide section has an inner cross section which is identical to that of the rectangular waveguide to be connected and is provided at the center of one of its wide sides, at a distance of about 1/8 λ g from the plane of connection with the elliptical waveguide, where λ g is the waveguide wavelength, with a first recess having the form of a portion of a cylinder, having a length, in the longitudinal direction of said waveguide section, less than 1/4 λ g , and having a depth which is related to its length in a manner such that the two waveguides to be connected will be matched over a broad band.
Claim 2
Dependent Claim
136 words
A connecting device comprising a waveguide section for connecting a rectangular waveguide with a waveguide having an approximately elliptical cross section, wherein said waveguide section has an inner cross section which is identical to that of the rectangular waveguide to be connected and is provided at the center of one of its wide sides, at a distance of about 1/8 λ g from the plane of connection with the elliptical waveguide, where λ g is the waveguide wavelength, with a first recess having the form of a portion of a cylinder, having a length, in the longitudinal direction of said waveguide section, less than 1/4 λ g , and having a depth which is related to its length in a manner such that the two waveguides to be connected will be matched over a broad band.
Claim 3
Dependent Claim
21 words
An arrangement as defined in cliam 1 wherein said first recess has the form of a segment of a circular cylinder.
Claim 4
Dependent Claim
21 words
An arrangement as defined in cliam 1 wherein said first recess has the form of a segment of a circular cylinder.
Claim 5
Dependent Claim
22 words
An arrangement as defined in claim 1 wherein each wide side of said waveguide section is provided with a respective first recess.
Claim 6
Dependent Claim
33 words
An arrangement as defined in claim 3 wherein the two said first recesses are located symmetrically to the axis of said waveguide section and are identical to one another in shape and dimensions.
Claim 7
Dependent Claim
103 words
Arrangement as defined in claim 1 wherein at least one of the wide sides of said waveguide section is provided with an additional recess at a distance of about 3/8 λ g , 5/8 λ g or 7/8 λ g from the plane of connection with the elliptical waveguide, the depth of said additional recess being less than the depth of said first recess and the length of said additional recess being less than 1/4 λ g , and said waveguide section includes a waveguide partial section of constant rectangular cross section located between, and separating, said first recess and said additional recess.
Claim 8
Dependent Claim
21 words
An arrangement as defined in claim 5 wherein each said recess has the form of a segment of a circular cylinder.
Claim 9
Dependent Claim
27 words
An arrangement as defined in claim 5 wherein each wide side of said waveguide section is provided with a respective first recess and a respective additional recess.
Claim 10
Dependent Claim
73 words
An arrangement as defined in claim 7 wherein said first recesses in said two wide sides of said waveguide section form a first pair of recesses and said additional recesses in said two wide sides of said waveguide section form a second pair of recesses, and the said recesses of each said pair are located symmetrically to the axis of said waveguide section and are identical to one another in shape and dimensions.
Claim 11
Dependent Claim
59 words
An arrangement as defined in claim 5 wherein at least one of the wide sides of said waveguide section is provided with a further recess at a distance of 5/8 λ g from the plane of connection with the elliptical waveguide, the depth and length of said further recess being less than the corresponding dimensions of said additional recess.
Claim 12
Dependent Claim
21 words
An arrangement as defined in claim 9 wherein each said recess has the form of a segment of a circular cylinder.
Claim 13
Dependent Claim
31 words
An arrangement as defined in claim 9 wherein each wide side of said waveguide section is provided with a respective first recess, a respective additional recess, and a respective further recess.
Claim 14
Dependent Claim
60 words
An arrangement as defined in claim 10 wherein said first recesses, said additional recesses and said further recesses in said two wide sides of said waveguide section form three respective pairs of recesses and said recesses of each said pair are located symmetrically to the axis of said waveguide section and are identical to one another in shape and dimensions.
Claim 15
Dependent Claim
94 words
An arrangement as defined in claim 1 wherein said waveguide section comprises a partial waveguide section having a length of no more than 1/16 λ g and disposed between the plane of connection with the elliptical waveguide and said first recess, each wide side of said partial waveguide section being provided with a respective recess having the form of a portion of a cylinder, the recesses in both said wide sides of said partial waveguide section defining parts of a single cylinder and each having a depth less than that of said first recess.
Claim 16
Dependent Claim
21 words
An arrangement as defined in claim 13 wherein said first recess has the form of a segment of a circular cylinder.
Claim 17
Dependent Claim
22 words
An arrangement as defined in claim 13 wherein each wide side of said waveguide section is provided with a respective first recess.
Claim 18
Dependent Claim
33 words
An arrangement as defined in claim 15 wherein the two said first recesses are located symmetrically to the axis of said waveguide section and are identical to one another in shape and dimensions.
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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |