US4795993A
Expired / Lapsed
US
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Matched dual mode waveguide corner
Assignee: Raytheon Co
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Filing: 1987-03-26
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Granted: 1989-01-03
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Expires: 2007-03-26
Abstract
Abstract A polarized, mitered corner (32) is constructed using a multiple surface reflector in a square waveguide corner. The multiple surface reflector (34) provides a mitered corner having one effective miter size for the E-plane mode and a different effective miter size for the H-plane mode (42, 44). The surfaces may comprise ridges which are parallel to the E-field in one of the two modes, so that the ridges behave as the reflecting surface for that mode while the backplane, upon which the ridges are formed, serves as the reflecting surface for the other mode. An alternate embodiment wherein the two reflecting surface comprise a plurality of parallel wires, is also disclosed.
Inventors
- 👤 Pyong K. Park
- 👤 Robert L. Eisenhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:45
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/02; H01P1/022
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
104 words
A matched dual mode waveguide corner comprising: first and second waveguides each for supporting two orthogonal modes of electromagnetic energy propagation; said first and second waveguides being joined together to define a corner; a reflecting means positioned in said corner for reflecting said electromagnetic energy from said first waveguide to said second waveguide; said reflecting means having at least two polarized reflecting surfaces disposed in different transverse planes, wherein a first one of said reflecting surfaces reflects one of said orthogonal modes of electromagnetic energy and wherein a second one of said reflecting surfaces reflects the other of said orthogonal modes of electromagnetic energy.
Claim 2
Dependent Claim
104 words
A matched dual mode waveguide corner comprising: first and second waveguides each for supporting two orthogonal modes of electromagnetic energy propagation; said first and second waveguides being joined together to define a corner; a reflecting means positioned in said corner for reflecting said electromagnetic energy from said first waveguide to said second waveguide; said reflecting means having at least two polarized reflecting surfaces disposed in different transverse planes, wherein a first one of said reflecting surfaces reflects one of said orthogonal modes of electromagnetic energy and wherein a second one of said reflecting surfaces reflects the other of said orthogonal modes of electromagnetic energy.
Claim 3
Dependent Claim
16 words
The waveguide corner of claim 1 wherein said first and second waveguides are both square waveguides.
Claim 4
Dependent Claim
14 words
The waveguide corner of claim 1 wherein said corner is a ninety degree corner.
Claim 5
Dependent Claim
43 words
The waveguide corner of claim 1 wherein said waveguides have orthogonal sidewalls and said reflecting means comprises a reflecting plane and at least one elongated ridge projecting outwardly from said reflecting plane, said ridge being oriented generally parallel to one of said sidewalls.
Claim 6
Dependent Claim
32 words
The waveguide corner of claim 2 wherein said waveguides have orthogonal sidewalls and wherein said reflecting surfaces are disposed in transverse planes which are orthogonal to at least one of said sidewalls.
Claim 7
Dependent Claim
19 words
The waveguide corner of claim 1 wherein said waveguides each simultaneously support two orthogonal modes of electromagnetic energy propagation.
Claim 8
Dependent Claim
20 words
The waveguide corner of claim 1 wherein said waveguides each support the TE 10 mode and the TE 01 mode.
Claim 9
Dependent Claim
62 words
The waveguide corner of claim 1 wherein said first reflecting surface is a predetermined first distance from a reference point on said corner and said second reflecting surface is a predetermined second distance from said reference point, said first and second distances being such that the tuned frequency of said waveguide corner is substantially the same for both of said orthogonal modes.
Claim 10
Dependent Claim
18 words
The waveguide corner of claim 1 wherein said reflecting means includes a plurality of spaced apart parallel ridges.
Claim 11
Dependent Claim
37 words
The waveguide corner of claim 9 wherein said ridges are spaced apart a distance such that propagation between said ridges is cutoff for the mode of propagation in which the E-field is oriented parallel to said ridges.
Claim 12
Dependent Claim
95 words
A matched dual mode waveguide comprising: a waveguide having a bend for supporting at least two orthogonal modes of electromagnetic energy propagation and for defining a common energy propagation path therefor; a reflecting means positioned in said waveguide proximate said bend for redirecting said common energy propagation path; said reflecting means defining a backplane and having at least one ridge means extending outwardly from said backplane; and said backplane providing a first reflecting surface for one of said orthogaonl modes and said ridge means providing a second reflecting surface for another of said orthogonal modes.
Claim 13
Dependent Claim
95 words
A matched dual mode waveguide comprising: a waveguide having a bend for supporting at least two orthogonal modes of electromagnetic energy propagation and for defining a common energy propagation path therefor; a reflecting means positioned in said waveguide proximate said bend for redirecting said common energy propagation path; said reflecting means defining a backplane and having at least one ridge means extending outwardly from said backplane; and said backplane providing a first reflecting surface for one of said orthogaonl modes and said ridge means providing a second reflecting surface for another of said orthogonal modes.
Claim 14
Dependent Claim
16 words
The waveguide of claim 11 wherein said first and second reflecting surfaces lie in different planes.
Claim 15
Dependent Claim
17 words
The waveguide of claim 11 wherein said first and second reflecting surfaces lie in different parallel planes.
Claim 16
Dependent Claim
12 words
The waveguide of claim 11 wherein said waveguide is a square waveguide.
Claim 17
Dependent Claim
24 words
The waveguide of claim 11 wherein said waveguide has orthogonal sidewalls and said ridge means is oriented generally parallel to one of said sidewalls.
Claim 18
Dependent Claim
19 words
The waveguide of claim 11 wherein said reflecting means has a plurality of ridges extending outwardly from said backplane.
Claim 19
Dependent Claim
23 words
The waveguide of claim 11 wherein said reflecting means has a plurality of parallel and spaced apart ridges extending outwardly from said backplane.
Claim 20
Dependent Claim
36 words
The waveguide of claim 17 wherein said ridges are spaced apart a distance such that propagation between said ridges is cutoff for a mode of propagation in which the E-field is oriented parallel to said ridges.
Claim 21
Dependent Claim
18 words
The waveguide corner of claim 11 wherein said reflecting means includes a plurality of spaced apart parallel wires.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |