Patent US3633104A successfully refreshed from Google Patents.
US3633104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-stability electromagnetic resonator
Assignee: HP Inc
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Filing: 1970-08-05
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Granted: 1972-01-04
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Expires: 1990-08-05
Abstract
Abstract A metal disc is deposited on a quartz substrate to reduce the effective linear thermal coefficient of expansion of the disc, and air is contained between the quartz substrate and a ground plane to reduce the effective dielectric constant thermal coefficient to make an electromagnetic resonator which is stable in frequency with temperature.
Inventors
- 👤 Douglas A Gray
- 👤 William W Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:19
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/08; H01P7/084; G; G01; G01S; G01S7/00; G01S7/02; G01S7/03; G01S7/032; G01S13/00; G01S13/02; G01S13/06; G01S13/46; G01S2013/466
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
An electromagnetic resonator comprising: first and second dieLectric layers; first and second metallic layers; the first metallic layer being bonded to the first dielectric layer; the first dielectric layer having a smaller linear thermal coefficient of expansion than the first metallic layer; the first and second metallic layers being separated by at least one of the dielectric layers; and the second dielectric layer being adjacent at least one of the first and second metallic layers and having a dielectric constant thermal coefficient smaller than or of opposite polarity from that of the first dielectric layer when the second dielectric layer is adjacent the second metallic layer and having a dielectric constant thermal coefficient of opposite polarity from that of the first dielectric layer when the second dielectric layer is adjacent the first metallic layer and not the second metallic layer.
Claim 2
Dependent Claim
140 words
An electromagnetic resonator comprising: first and second dieLectric layers; first and second metallic layers; the first metallic layer being bonded to the first dielectric layer; the first dielectric layer having a smaller linear thermal coefficient of expansion than the first metallic layer; the first and second metallic layers being separated by at least one of the dielectric layers; and the second dielectric layer being adjacent at least one of the first and second metallic layers and having a dielectric constant thermal coefficient smaller than or of opposite polarity from that of the first dielectric layer when the second dielectric layer is adjacent the second metallic layer and having a dielectric constant thermal coefficient of opposite polarity from that of the first dielectric layer when the second dielectric layer is adjacent the first metallic layer and not the second metallic layer.
Claim 3
Dependent Claim
31 words
An electromagnetic resonator as in claim 1 wherein the second metallic layer is adjacent to the second dielectric layer and the first dielectric layer is adjacent to the second dielectric layer.
Claim 4
Dependent Claim
31 words
An electromagnetic resonator as in claim 1 wherein the second metallic layer is adjacent to the first dielectric layer and the second dielectric layer is adjacent to the first metallic layer.
Claim 5
Dependent Claim
36 words
An electromagnetic resonator as in claim 2 wherein the first dielectric layer is quartz, the second dielectric layer is air and the first metallic layer is a metal disc vacuum deposited on the first dielectric layer.
Claim 6
Dependent Claim
21 words
An electromagnetic resonator as in claim 4 including strip line means to couple signals into and out of the electromagnetic resonator.
Claim 7
Dependent Claim
59 words
An electromagnetic resonator as in claim 2 wherein the electromagnetic resonator is part of a microwave transceiver, the electromagnetic resonator being connected to a negative resistance device and a directional coupler, the directional coupler being connected to a circulator, a detector being connected to the directional coupler through a band-pass filter, and output means being connected to the detector.
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |