US3614672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waveguide couplers
Assignee: BAE Systems Electronics Ltd
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Filing: 1970-06-05
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Granted: 1971-10-19
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Expires: 1990-06-05
Abstract
Abstract A coupler consists of two lengths of waveguide having a common narrow wall and which are capable of supporting the TE10 and TE20 modes of wave propagation, and inserted in a gap in said wall substituting for the part removed from the gap, a reactive structure having elements resonant at a predetermined operating frequency and situated in succession along the guide. The coupler can be used as a simple coupler when the elements are constituted by three closed rings and couple energy fed in at the input of one guide into the other guide or as a diplexer when there are six rings and energies at two different frequencies are fed to the input ends of the guides.
Inventors
- 👤 Roderick Edward Newbould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:55
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/18; H01P5/181; H01P5/182; H01P1/00; H01P1/20; H01P1/213
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
150 words
A waveguide coupler comprising two lengths of rectangular waveguide having a common narrow wall and capable of supporting the TE10 and TE20 modes of wave propagation; means defining a gap formed in said common wall; a reactive structure inserted in said gap so as to substitute for the part of the common wall removed to form said gap, said reactive structure having at least three reactive elements in the form of closed rings resonant at or near a predetermined operating frequency and situated one behind the other at quarter wavelength intervals along the centerline of the common wall; and supporting links joining the rings one to another and to the said common wall at opposite ends of the gap therein, said links being situated substantially at positions of zero electrical field (when the coupler is in operation) so as to be, from the electrical point of view, of no effect.
Claim 2
Dependent Claim
150 words
A waveguide coupler comprising two lengths of rectangular waveguide having a common narrow wall and capable of supporting the TE10 and TE20 modes of wave propagation; means defining a gap formed in said common wall; a reactive structure inserted in said gap so as to substitute for the part of the common wall removed to form said gap, said reactive structure having at least three reactive elements in the form of closed rings resonant at or near a predetermined operating frequency and situated one behind the other at quarter wavelength intervals along the centerline of the common wall; and supporting links joining the rings one to another and to the said common wall at opposite ends of the gap therein, said links being situated substantially at positions of zero electrical field (when the coupler is in operation) so as to be, from the electrical point of view, of no effect.
Claim 3
Dependent Claim
31 words
A waveguide coupler as claimed in claim 1 wherein the rings are of rectangular shape and are locally thickened on the opposite horizontal members for reducing the possibility of voltage breakdown.
Claim 4
Dependent Claim
15 words
A waveguide coupler as claimed in claim 1 wherein said rings consist of three rings.
Claim 5
Dependent Claim
15 words
A waveguide coupler as claimed in claim 2 wherein said rings consist of three rings.
Claim 6
Dependent Claim
31 words
A waveguide coupler as claimed in claim 1 wherein said rings consist of six rings connected in two groups of three rings whereby the coupler may be used as a diplexer.
Claim 7
Dependent Claim
31 words
A waveguide coupler as claimed in claim 2 wherein said rings consist of six rings connected in two groups of three rings whereby the coupler may be used as a diplexer.
Claim 8
Dependent Claim
19 words
A coupler as claimed in claim 1 wherein input and output ends of the lengths of waveguide are stepped.
Claim 9
Dependent Claim
19 words
A coupler as claimed in claim 2 wherein input and output ends of the lengths of waveguide are stepped.
Claim 10
Dependent Claim
19 words
A coupler as claimed in claim 3 wherein input and output ends of the lengths of waveguide are stepped.
Claim 11
Dependent Claim
17 words
A coupler as claimed in claim 4 wherein input and output ends of the coupler are stepped.
Claim 12
Dependent Claim
19 words
A coupler as claimed in claim 4 wherein input and output ends of the lengths of waveguide are stepped.
Claim 13
Dependent Claim
19 words
A coupler as claimed in claim 5 wherein input and output ends of the lengths of waveguide are stepped.
Claim 14
Dependent Claim
19 words
A coupler as claimed in claim 6 wherein input and output ends of the lengths of waveguide are stepped.
Claim 15
Dependent Claim
33 words
A waveguide coupler as claimed in claim 1 wherein energies at two different frequencies are fed to input ends of the lengths of waveguide whereby the coupler may be used as a diplexer.
Claim 16
Dependent Claim
75 words
A waveguide coupler as claimed in claim 14 wherein the reactive elements are resonant at or near one of the said frequencies whereby the result is achieved that the input of that frequency fed into one of said lengths of waveguide is coupled into the other of said lengths of waveguide, and the input of the other of said frequencies remains in and passes virtually unchanged along length of waveguide into which it was fed.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |