US4034315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveguide directional coupler
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1976-02-27
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Granted: 1977-07-05
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Expires: 1996-02-27
Abstract
Abstract A waveguide junction for joining together two pairs of rectangular waveguide arms, each pair being connected to present a corner connection, to form a directional coupler in which the four arms are arranged to define a cross, the junction being composed of an element constituting a partially radiation-permeable obstacle oriented diagonally to all of the waveguide arms and two waveguide sections each disposed between a respective side of the obstacle and a respective pair of waveguide arms and dimensioned so as to match the impedance at the surfaces of the obstacle to the values required at the corner connections in a manner to permit the coupler to operate in a frequency range which permits propagation of the desired waveguide mode while spurious modes excited in the coupler are evanescent.
Inventors
- 👤 Udo Unrau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:34
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/19
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
In a waveguide junction composed of two pairs of rectangular waveguide branches arranged in the manner of the arms of a cross with at least one partially radiation-reflecting obstacle disposed in the junction diagonally of the arms to produce a directional coupler, the improvement wherein said junction comprises two waveguide sections each disposed at a respective side of said obstacle and interposed between said obstacle and a respective pair of waveguide branches, said waveguide sections constituting means for matching the impedance at the surface of the obstacle to the values required at the regions of connection between each pair of branches to permit the coupler to operate in a frequency range in which the useful waveguide mode can propagate while spurious modes excited in the coupler are evanescent.
Claim 2
Dependent Claim
128 words
In a waveguide junction composed of two pairs of rectangular waveguide branches arranged in the manner of the arms of a cross with at least one partially radiation-reflecting obstacle disposed in the junction diagonally of the arms to produce a directional coupler, the improvement wherein said junction comprises two waveguide sections each disposed at a respective side of said obstacle and interposed between said obstacle and a respective pair of waveguide branches, said waveguide sections constituting means for matching the impedance at the surface of the obstacle to the values required at the regions of connection between each pair of branches to permit the coupler to operate in a frequency range in which the useful waveguide mode can propagate while spurious modes excited in the coupler are evanescent.
Claim 3
Dependent Claim
22 words
Arrangement as defined in claim 1 wherein the directional coupler is arranged to operate in the single-mode range of the waveguide branches.
Claim 4
Dependent Claim
33 words
Arrangement as defined in claim 1 wherein said obstacle comprises a slab of a material for which the product of its relative permeability constant and its relative dielectric constant is unequal to 1.
Claim 5
Dependent Claim
32 words
Arrangement as defined in claim 1 wherein said obstacle comprises a plurality of individual slabs which are stacked in a layer transversely to the direction of propagation of waves in said junction.
Claim 6
Dependent Claim
42 words
Arrangement as defined in claim 1 further comprising a body of material at least partially filling said waveguide sections, with the product of the relative permeability constant and the relative dielectric constant of the material of said body being unequal to 1.
Claim 7
Dependent Claim
26 words
Arrangement as defined in claim 1 wherein a portion of said junction is defined by a rounded connection between the side walls to adjacent waveguide branches.
Claim 8
Dependent Claim
20 words
Arrangement as defined in claim 6 wherein said waveguide sections are defined by extensions of walls of said waveguide branches.
Claim 9
Dependent Claim
21 words
Arrangement as defined in claim 1 wherein said waveguide sections are rectangular in shape and have identical parallel side wall dimensions.
Claim 10
Dependent Claim
18 words
Arrangement as defined in claim 1 wherein said junction constitutes an E plane connection between said waveguide branches.
Claim 11
Dependent Claim
20 words
Arrangement as defined in claim 5 wherein said body of material is composed of a layered stack of different materials.
References Cited (Backward Citations)
US3579148A
Cited
US3741625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |