US4034314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave diode coaxial circuit oscillator improvement
Assignee: Motorola Solutions Inc
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Filing: 1976-06-24
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Granted: 1977-07-05
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Expires: 1996-06-24
Abstract
Abstract An improvement in a prior art microwave diode coaxial oscillator circuit comprising an unloaded fundamental frequency cavity for prevention of energy loss in the matching termination at the resonant frequency of the circuit and a second harmonic resonant cavity for controlling second harmonic loading of the diode and for reducing noise in the output signal.
Inventors
- 👤 Michael Dydyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:55
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/145; H03B9/143; H03B2009/126
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
In a coaxial microwave oscillator circuit having at least one negative resistance semiconductor diode, and at least one matched terminating load wherein the at least one diode and the at least one load are positioned at opposite ends of at least one coaxial circuit and an output signal is coupled from a point intermediate the diode and the load, the improvement comprising: an unloaded cavity of resonant frequency, f 0 , coupled to the at least one coaxial circuit at a point one-quarter wavelength at frequency f 0 from the output signal coupling points.
Claim 2
Dependent Claim
94 words
In a coaxial microwave oscillator circuit having at least one negative resistance semiconductor diode, and at least one matched terminating load wherein the at least one diode and the at least one load are positioned at opposite ends of at least one coaxial circuit and an output signal is coupled from a point intermediate the diode and the load, the improvement comprising: an unloaded cavity of resonant frequency, f 0 , coupled to the at least one coaxial circuit at a point one-quarter wavelength at frequency f 0 from the output signal coupling points.
Claim 3
Dependent Claim
22 words
The oscillator according to claim 1 wherein the output signal is coupled to an accumulator cavity of resonant frequency f 0 .
Claim 4
Dependent Claim
145 words
In a coaxial microwave oscillator circuit having at least one negative resistance semiconductor diode and at least one matched terminating load wherein the at least one diode and the at least one load are positioned at opposite ends of at least one coaxial circuit and an output signal is coupled from a point intermediate the diode and the load, the improvement comprising: an unloaded cavity of resonant frequency, f 0 , coupled to the at least one coaxial circuits at a point one-quarter wavelength at frequency f 0 from the output signal coupling points; and at least one unloaded cavity of resonant frequency 2f 0 , each of said at least one unloaded cavities of resonant frequency 2f 0 being coupled to the at least one coaxial circuit, respectively, at a point an integral number of one-eighth wavelengths at frequency f 0 from the diode.
Claim 5
Dependent Claim
145 words
In a coaxial microwave oscillator circuit having at least one negative resistance semiconductor diode and at least one matched terminating load wherein the at least one diode and the at least one load are positioned at opposite ends of at least one coaxial circuit and an output signal is coupled from a point intermediate the diode and the load, the improvement comprising: an unloaded cavity of resonant frequency, f 0 , coupled to the at least one coaxial circuits at a point one-quarter wavelength at frequency f 0 from the output signal coupling points; and at least one unloaded cavity of resonant frequency 2f 0 , each of said at least one unloaded cavities of resonant frequency 2f 0 being coupled to the at least one coaxial circuit, respectively, at a point an integral number of one-eighth wavelengths at frequency f 0 from the diode.
Claim 6
Dependent Claim
22 words
The oscillator according to claim 3 wherein the output signal is coupled to an accumulator cavity of resonant frequency f 0 .
Claim 7
Dependent Claim
112 words
In a coaxial microwave oscillator circuit having at least one negative resistance semiconductor diode and at least one matched terminating load wherein the at least one diode and the at least one load are positioned at opposite ends of at least one coaxial circuit and an output signal is coupled from a point intermediate the diode and the load, the improvement comprising: at least one unloaded cavity of resonant frequency 2f 0 , each of said at least one unloaded cavities of resonant frequency 2f 0 being coupled to the at least one coaxial circuit, respectively, at a point an integral number of one-eighth wavelengths at frequency f 0 from the diode.
Claim 8
Dependent Claim
112 words
In a coaxial microwave oscillator circuit having at least one negative resistance semiconductor diode and at least one matched terminating load wherein the at least one diode and the at least one load are positioned at opposite ends of at least one coaxial circuit and an output signal is coupled from a point intermediate the diode and the load, the improvement comprising: at least one unloaded cavity of resonant frequency 2f 0 , each of said at least one unloaded cavities of resonant frequency 2f 0 being coupled to the at least one coaxial circuit, respectively, at a point an integral number of one-eighth wavelengths at frequency f 0 from the diode.
Claim 9
Dependent Claim
22 words
The oscillator according to claim 5 wherein the output signal is coupled to an accumulator cavity of resonant frequency f 0 .
References Cited (Backward Citations)
US3534293A
Cited
US3626327A
Cited
US3628171A
Cited
US3743966A
Cited
US3882411A
Cited
US3931587A
Cited
US3984788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |