US4031486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medium Q high power dual cavity oscillator
Assignee: Motorola Solutions Inc
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Filing: 1976-05-26
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Granted: 1977-06-21
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Expires: 1996-05-26
Abstract
Abstract The dual cavity oscillator includes a pair of electromagnetically coupled resonators and a limited space charge accumulation (LSA) device disposed in one of the resonators. The resonators form a parallel resonance circuit at a first frequency and the LSA device and the pair of resonators form a series resonance circuit when the oscillator is operated at a second frequency which is generally within a few percent below the first frequency.
Inventors
- 👤 Richard Calvin Havens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:53
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/145; H03B2009/126
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A microwave oscillator comprising: a first resonator: a second resonator electromagnetically coupled to the first resonator; negative resistance means electromagnetically coupled to the first resonator; means for supplying energy to said negative resistance means to provide RF energy; means for coupling the output of the second resonator electromagnetically to a load wherein said first and said second resonators form a circuit with the characteristics of a parallel resonant circuit at a first frequency and wherein said negative resistance means and said first and second resonators form a circuit with the characteristics of a series resonant circuit when the oscillator is operated at a second frequency which is within 20% below said first frequency.
Claim 2
Dependent Claim
113 words
A microwave oscillator comprising: a first resonator: a second resonator electromagnetically coupled to the first resonator; negative resistance means electromagnetically coupled to the first resonator; means for supplying energy to said negative resistance means to provide RF energy; means for coupling the output of the second resonator electromagnetically to a load wherein said first and said second resonators form a circuit with the characteristics of a parallel resonant circuit at a first frequency and wherein said negative resistance means and said first and second resonators form a circuit with the characteristics of a series resonant circuit when the oscillator is operated at a second frequency which is within 20% below said first frequency.
Claim 3
Dependent Claim
18 words
The oscillator according to claim 1 wherein said negative resistance means is a limited space charge accumulation device.
Claim 4
Dependent Claim
31 words
The oscillator according to claim 1 wherein said first resonator includes a low Q radial mode resonant cavity and wherein said second resonator includes a high Q convoluted coaxial line cavity.
Claim 5
Dependent Claim
34 words
The oscillator according to claim 1 wherein said oscillator components are adjusted so that said oscillator operates at said second frequency which is within a few percent below said first frequency for optimal operation.
References Cited (Backward Citations)
US3534293A
Cited
US3626327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |