US4454489A
Expired / Lapsed
US
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Temperature stabilized microwave cavities
Assignee: Telettra SpA
•
Filing: 1981-07-02
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Granted: 1984-06-12
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Expires: 2001-07-02
Abstract
Abstract The description covers temperature stabilized resonant microwave cavities not requiring hermetic sealing and easy to be frequency adjusted. Essentially, they consist of a pure quartz body with a metallized surface, except for small superficial areas used for the couplings.
Inventors
- 👤 Amedeo Donazzan
- 👤 Enzo Pome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:34
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/06; H01P1/00; H01P1/30; H01P7/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
A resonant cavity comprising a hollow body of pure amorphous quartz covered with a first thin layer of highly conductive metal and a second thickening metal layer, and further comprising active circuit oscillator means and coupling means for coupling the resonant cavity to said oscillator means to stabilize the oscillator means frequency with respect to the cavity frequency.
Claim 2
Dependent Claim
58 words
A resonant cavity comprising a hollow body of pure amorphous quartz covered with a first thin layer of highly conductive metal and a second thickening metal layer, and further comprising active circuit oscillator means and coupling means for coupling the resonant cavity to said oscillator means to stabilize the oscillator means frequency with respect to the cavity frequency.
Claim 3
Independent Claim
66 words
A method for preparing a resonant microwave cavity comprising the steps of: cutting a quartz rod into small rod sections having predetermined dimensions; applying a first relatively thin metal layer on the small rod sections; and applying a second thicker metal layer over said first thin metal layer, wherein said first thin metal layer is applied by submerging the rod sections in a conductive metal bath.
Claim 4
Independent Claim
66 words
A method for preparing a resonant microwave cavity comprising the steps of: cutting a quartz rod into small rod sections having predetermined dimensions; applying a first relatively thin metal layer on the small rod sections; and applying a second thicker metal layer over said first thin metal layer, wherein said first thin metal layer is applied by submerging the rod sections in a conductive metal bath.
Claim 5
Dependent Claim
14 words
The method according to claim 2 wherein the second metal layer is applied galvanically.
Claim 6
Independent Claim
65 words
A method for preparing a resonant microwave cavity comprising the steps of: cutting a quartz rod into small rod sections having predetermined dimensions; applying a first relatively thin metal layer on the small rod sections; and applying a second thicker metal layer over said first thin metal layer, wherein the first thin metal layer is applied by brushing the rod sections with a metal paint.
Claim 7
Independent Claim
65 words
A method for preparing a resonant microwave cavity comprising the steps of: cutting a quartz rod into small rod sections having predetermined dimensions; applying a first relatively thin metal layer on the small rod sections; and applying a second thicker metal layer over said first thin metal layer, wherein the first thin metal layer is applied by brushing the rod sections with a metal paint.
Claim 8
Dependent Claim
14 words
The method according to claim 4 wherein the second metal layer is applied galvanically.
References Cited (Backward Citations)
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GB1199908A
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US3636480A
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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) | 1987-06-12 | 1987-12-12 | 1988-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-12 | 1991-12-12 | 1992-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-12 | 1995-12-12 | 1996-06-12 | $7700.00 | Window Closed / Lapsed |