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Patent US4319208A successfully refreshed from Google Patents.
US4319208A
Expired / Lapsed
US
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Microwave filter incorporating dielectric resonators
Assignee: Thales SA
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Filing: 1979-07-18
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Granted: 1982-03-09
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Expires: 1999-07-18
Abstract
Abstract The filter is of the type comprising a waveguide and an electromagnetically coupled dielectric resonator. A slot constituting the waveguide is cut in a metal plate forming part of the filter. The resonator is separated from the metal plate by a dielectric support.
Inventors
- 👤 Pierre de Bayser
- 👤 Pierre Fraise
- 👤 Yves Le Nohaic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:25
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/201; H01P1/2016
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A microwave filter comprising a metal plate, a slotted waveguide and n dielectric resonators (n being a positive integer) which are electromagnetically coupled to the slotted waveguide, wherein said waveguide is constituted by a slot which is cut in said metal plate, and in which the metal plate is a rigid plate, wherein the slot has been formed by cutting in said metal plate, said filter being provided with n wafers of dielectric material placed between the metal plate and the n resonators respectively.
Claim 2
Dependent Claim
84 words
A microwave filter comprising a metal plate, a slotted waveguide and n dielectric resonators (n being a positive integer) which are electromagnetically coupled to the slotted waveguide, wherein said waveguide is constituted by a slot which is cut in said metal plate, and in which the metal plate is a rigid plate, wherein the slot has been formed by cutting in said metal plate, said filter being provided with n wafers of dielectric material placed between the metal plate and the n resonators respectively.
Claim 3
Dependent Claim
73 words
A microwave filter of the bandstop type comprising a metal plate, a slotted waveguide and n dielectric resonators (n being a positive integer) which are electromagnetically coupled to the slotted waveguide, wherein said waveguide is constituted by a slot which is cut in said metal plate, wherein said filter comprises n short-circuits for dividing the slot into n+1 sections and wherein n resonators are respectively placed in the vicinity of the n short-circuits.
Claim 4
Dependent Claim
73 words
A microwave filter of the bandstop type comprising a metal plate, a slotted waveguide and n dielectric resonators (n being a positive integer) which are electromagnetically coupled to the slotted waveguide, wherein said waveguide is constituted by a slot which is cut in said metal plate, wherein said filter comprises n short-circuits for dividing the slot into n+1 sections and wherein n resonators are respectively placed in the vicinity of the n short-circuits.
Claim 5
Dependent Claim
53 words
A microwave filter according to claim 2, wherein said filter comprises a dielectric plate having a first face on which is deposited a metallic coating constituting said metal plate and another face on which are fixed the n resonators and wherein the slot has been formed by an interruption in said metallic coating.
Claim 6
Dependent Claim
48 words
A microwave filter according to claim 2, in which the metal plate is a rigid plate, wherein the slot has been formed by cutting in said metal plate, said filter being provided with n wafers of dielectric material placed between the metal plate and the n resonators respectively.
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) | 1985-03-08 | 1985-09-07 | 1986-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-08 | 1989-09-07 | 1990-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-08 | 1993-09-07 | 1994-03-09 | $7700.00 | Window Closed / Lapsed |