US3668551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state microwave oscillator with ceramic capacitance temperature compensating element
Assignee: Mitsubishi Electric Corp
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Filing: 1970-11-02
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Granted: 1972-06-06
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Expires: 1990-11-02
Abstract
Abstract An enclosed Gunn effect diode is disposed within a microwave resonant cavity. A capacitive element of dielectric ceramic such as titanium oxide having a negative temperature coefficient of capacitance is attached to the insulating portion of the enclosure for the diode. Alternatively the enclosure for the diode may be partly or entirely formed of such a dielectric ceramic.
Inventors
- 👤 Akihiro Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:31
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/145; H03B2009/126
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
38 words
A solid state microwave oscillator according to claim 1, wherein said enclosure comprises a tubular element of insulating material and said capacitative element comprises a ceramic element extending along a wall of said tubular element between said electrodes.
Claim 2
Dependent Claim
25 words
A solid state microwave oscillator according to claim 1, wherein said capacitative element forms at least part of said hollow enclosure extending between said electrodes.
Claim 3
Dependent Claim
21 words
A solid state microwave oscillator according to claim 1, wherein said solid state microwave oscillation element is a Gunn effect diode.
Claim 4
Dependent Claim
22 words
A solid state microwave oscillator according to claim 1, wherein said solid state microwave oscillation element is an avalanche-transit time effect diode.
Claim 5
Dependent Claim
20 words
A solid state microwave oscillator according to claim 1, wherein said capacitative element is of a titanium oxide ceramic material.
Claim 6
Dependent Claim
20 words
A solid state microwave oscillator according to claim 1, wherein said capacitative element is of a magnesium titanate ceramic material.
Claim 7
Dependent Claim
74 words
A solid state microwave oscillator comprising a resonant cavity, a semiconductor microwave oscillation unit disposed in said cavity and comprising spaced electrodes, a hollow enclosure of insulating material extending between said electrodes and an oscillation element within said enclosure, and a ceramic capacitance temperature compensating element extending along a wall of said enclosure between said electrodes, said capacitative element having a selected negative temperature coefficient to compensate for changes of temperature of said oscillator.
Claim 8
Dependent Claim
21 words
A solid state microwave oscillator according to claim 8, wherein said capacitative element is a strip of titanium oxide ceramic material.
Claim 9
Dependent Claim
21 words
A solid state microwave oscillator according to claim 8, wherein said capacitative element is a strip of magnesium titanate ceramic material.
Claim 10
Dependent Claim
73 words
A solid state microwave oscillator comprising a resonant cavity, a semiconductor microwave oscillation unit disposed in said cavity and comprising spaced electrodes, a hollow cylindrical enclosure of dielectric material extending between said electrodes and an oscillation element within said enclosure, said enclosure being formed at least in part of ceramic material constituting a ceramic capacitative temperature compensating element having a selected negative temperature coefficient to compensate for changes of temperature of said oscillator.
Claim 11
Dependent Claim
22 words
A solid state microwave oscillator according to claim 11, wherein said enclosure is formed in part of a titanium oxide ceramic material.
Claim 12
Dependent Claim
21 words
A solid state microwave oscillator according to claim 11, wherein said enclosure is formed in part of magnesium titanate ceramic material.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |