Patent US4734665A successfully refreshed from Google Patents.
US4734665A
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Microwave filter
Assignee: Bosch Telecom GmbH
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Filing: 1987-06-23
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Granted: 1988-03-29
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Expires: 2007-06-23
Abstract
Abstract A microwave filter composed of at least two cavity resonators disposed adjacent one another, and a coupling aperture disposed between the resonators for coupling microwave energy between the resonators, one of the cavity resonators being operative to propagate microwave energy having a TE mode and the other of the cavity resonators being operative to propagate microwave energy having a TM mode, wherein the coupling aperture is constructed for coupling the TE mode in the one cavity resonator with the TM mode in the other cavity resonator.
Inventors
- 👤 Uwe Rosenberg
- 👤 Dieter Wolk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:05
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/207; H01P1/208; H01P1/2082
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
In a microwave filter comprising at least two cavity resonators disposed adjacent one another, and means including a coupling aperture disposed between said resonators for coupling microwave energy between said resonators, one of said cavity resonators constituting means for propagating microwave energy having a TE mode and the other of said cavity resonators constituting means for propagating microwave energy having a TM mode, the improvement wherein said means including a coupling aperture are constructed for coupling the TE mode in said one cavity resonator with the TM mode in said other cavity resonator.
Claim 2
Dependent Claim
93 words
In a microwave filter comprising at least two cavity resonators disposed adjacent one another, and means including a coupling aperture disposed between said resonators for coupling microwave energy between said resonators, one of said cavity resonators constituting means for propagating microwave energy having a TE mode and the other of said cavity resonators constituting means for propagating microwave energy having a TM mode, the improvement wherein said means including a coupling aperture are constructed for coupling the TE mode in said one cavity resonator with the TM mode in said other cavity resonator.
Claim 3
Dependent Claim
53 words
A microwave filter as defined in claim 1 wherein said coupling aperture extends along a plane and comprises at least one coupling iris disposed at a location where the magnetic field lines of the TM mode are at least approximately parallel to the magnetic field lines of the TE mode in the plane.
Claim 4
Dependent Claim
58 words
A microwave filter as defined in claim 1 wherein said other cavity resonator additionally constitutes means for propagating microwave energy having a TE mode polarized in the same direction as the TE mode in said one cavity resonators, and said means including a coupling aperture are further constructed to couple the TE modes in said two cavity resonators.
Claim 5
Dependent Claim
127 words
A microwave filter as defined in claim 1 wherein said one of said cavity resonators constitutes means for propagating microwave energy having a first TE mode and a second TE mode, with the first and second TE modes being polarized mutually perpendicularly; said other one of said cavity resonators additionally constitutes means for propagating microwave energy having a third TE mode polarized parallel to the first TE mode, and a fourth TE mode polarized parallel to the second TE mode; and said means including a coupling aperture comprise a first coupling iris for coupling the first TE mode with the third TE mode and the TM mode and a second coupling iris for coupling the second TE mode with the fourth TE mode and the TM mode.
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) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |