Patent US5008640A successfully refreshed from Google Patents.
US5008640A
Expired / Lapsed
US
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Dielectric-loaded cavity resonator
Assignee: Telecom Italia SpA
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Filing: 1989-07-17
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Granted: 1991-04-16
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Expires: 2009-07-17
Abstract
Abstract The cavity resonator is composed of a closed metallic body transversely subdivided into two parts, housing a small dielectric cylinder, which is held in coaxial position inside the cavity by two small quartz plates provided with a centering indentation. Holes are provided in the lateral surface for tuning screws and an access connector and coupling irises can be cut in the bases.
Inventors
- 👤 Luciano Accatino
- 👤 Giorgio Bertin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:29
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/10; H01P1/00; H01P1/20; H01P1/207; H01P1/208; H01P1/2084
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
A dielectric-loaded cavity resonator, comprising: a generally closed metallic housing defining a cylindrical cavity and formed with two spaced-apart steps on opposite sides of an increased-diameter portion of said cavity spaced from opposite ends of said housing; and a dielectric assembly received in said housing and comprising: a pair of dielectric plates each seated in one of said steps and formed with a centering indentation opening toward the other of said plates, and a dielectric cylinder received between said plates and having opposite bases each received in a respective one of said indentations, whereby said assembly formed by said plates and said cylinder is held in a fixed position in said cavity and is spaced from said ends by said steps.
Claim 2
Dependent Claim
121 words
A dielectric-loaded cavity resonator, comprising: a generally closed metallic housing defining a cylindrical cavity and formed with two spaced-apart steps on opposite sides of an increased-diameter portion of said cavity spaced from opposite ends of said housing; and a dielectric assembly received in said housing and comprising: a pair of dielectric plates each seated in one of said steps and formed with a centering indentation opening toward the other of said plates, and a dielectric cylinder received between said plates and having opposite bases each received in a respective one of said indentations, whereby said assembly formed by said plates and said cylinder is held in a fixed position in said cavity and is spaced from said ends by said steps.
Claim 3
Dependent Claim
66 words
The cavity resonator defined in claim 1 wherein said housing is subdivided transversely to an axis of said cavity into two parts, one of said parts being formed with said increased-diameter portion of a height substantially equal to the height of said assembly and the other of said parts being formed with a cylindrical cavity of a diameter slightly smaller than a diameter of said plates.
Claim 4
Dependent Claim
27 words
The cavity resonator defined in claim 1 wherein each of said plates is formed with an axial hole having a diameter smaller than that of said indentation.
References Cited (Backward Citations)
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Cited
US4488124A
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US4489293A
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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) | 1994-04-15 | 1994-10-15 | 1995-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-15 | 1998-10-15 | 1999-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-15 | 2002-10-15 | 2003-04-16 | $7700.00 | Window Closed / Lapsed |