US4021755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave oscillator having negative resistance diode inductively and capacitively mounted in waveguide cavity
Assignee: Incentive AB
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Filing: 1975-09-05
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Granted: 1977-05-03
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Expires: 1995-09-05
Abstract
Abstract A microwave oscillator comprises a wave-guide having a closed end with a semiconductor diode having a negative differential resistance for the frequency used placed in the wave-guide spaced from the closed end and electrically connected to two elements protruding inwardly from opposite walls of the wave-guide, with one of the elements being electrically isolated from the wall and having an unsymmetrical, rotatable body. The wave-guide may be conical if desired.
Inventors
- 👤 Stig Lennart Svensson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:12
CPC Classifications
H; H03; H03B; H03B7/00; H03B7/12; H03B7/14; H03B2201/00; H03B2201/01; H03B2201/014; H03B2201/015
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A microwave oscillator comprising a shorted stub wave-guide, a semiconductor diode having a negative differential resistance for the frequency used, and two electrically conductive elements protruding inwardly from opposite walls of the wave-guide at a predetermined distance from the closed end of the wave-guide, said semiconductor diode being arranged between two opposite walls of the wave-guide and in electrical contact with said two elements, one of said elements being electrically isolated from the wall of the wave-guide and rotatable about the axis of said diode and said two elements and also being unsymmetrical with respect to said axis.
Claim 2
Dependent Claim
98 words
A microwave oscillator comprising a shorted stub wave-guide, a semiconductor diode having a negative differential resistance for the frequency used, and two electrically conductive elements protruding inwardly from opposite walls of the wave-guide at a predetermined distance from the closed end of the wave-guide, said semiconductor diode being arranged between two opposite walls of the wave-guide and in electrical contact with said two elements, one of said elements being electrically isolated from the wall of the wave-guide and rotatable about the axis of said diode and said two elements and also being unsymmetrical with respect to said axis.
Claim 3
Dependent Claim
26 words
A microwave oscillator according to claim 1, characterized in that said one element includes a stem projecting outwardly from the wave-guide for rotation of said element.
Claim 4
Dependent Claim
31 words
A microwave oscillator according to claim 1, characterized in that the other of said two elements comprises an elongated pin extending in a plane tranverse to the length of the wave-guide.
Claim 5
Dependent Claim
30 words
A microwave oscillator according to claim 1, characterized in that a thin element of electrically nonconductive material is interposed between said one element and the adjacent wall of the wave-guide.
Claim 6
Dependent Claim
23 words
A microwave oscillator according to claim 4, characterized in that said one element is generally elongated and is rotatable about a transverse axis.
Claim 7
Dependent Claim
14 words
A microwave oscillator according to claim 5, characterized in that said wave-guide is conical.
References Cited (Backward Citations)
US3611374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |