US4079341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave oscillator having feedback coupled through a dielectric resonator
Assignee: AT&T Inc
•
Filing: 1977-03-01
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Granted: 1978-03-14
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Expires: 1997-03-01
Abstract
Abstract An apparatus for stabilizing microwave oscillator circuits is disclosed. The apparatus comprises a dielectric resonator positioned in the vicinity of a microwave semiconductive device for completing a feedback path between two electrode circuits of the device. A dielectric spacer is positioned between the resonator and the electrodes for supporting the resonator and controlling the magnitude of coupling between the two electrode circuits. A folded mechanical structure is described wherein the oscillating device and the resonator are located at the fold for improving the frequency stability of the oscillator. The microwave semiconductive device may be a bipolar transistor or a field effect transistor.
Inventors
- 👤 Donald Floyd Linn
- 👤 James Kevin Plourde
- 👤 Clarence Burke Swan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:00
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/18; H03B5/1864; H03B5/187; H03B5/02; H03B5/04; H03B5/1841; H03B5/1847
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
70 words
A microwave oscillator circuit comprising: a microwave semiconductive device having at least first and second electrode circuits: and a dielectric resonator positioned in the vicinity of said device for completing a feedback path between said first and said second electrode circuits, wherein means positioned between said electrode circuits and said dielectric resonator comprise a dielectric spacer for controlling the magnitude of coupling between said first and said second electrode circuits.
Claim 2
Dependent Claim
70 words
A microwave oscillator circuit comprising: a microwave semiconductive device having at least first and second electrode circuits: and a dielectric resonator positioned in the vicinity of said device for completing a feedback path between said first and said second electrode circuits, wherein means positioned between said electrode circuits and said dielectric resonator comprise a dielectric spacer for controlling the magnitude of coupling between said first and said second electrode circuits.
Claim 3
Dependent Claim
18 words
A microwave oscillator circuit according to claim 1 wherein said semiconductive device is a microwave bipolar transistor device.
Claim 4
Dependent Claim
18 words
A microwave oscillator circuit according to claim 1 wherein said semiconductive device is a microwave field effect transistor.
Claim 5
Dependent Claim
76 words
A microwave oscillator comprising a microwave transistor device having at least first and second electrode branch circuits; a carrier plate having first and second planar surfaces for respectively supporting said first and said second electrode branch circuits; means for positioning said transistor device at one end of said plate between said surfaces; and a dielectric resonator positioned proximate to said transistor device for completing a feedback path between said first and said second electrode branch circuits.
Claim 6
Dependent Claim
76 words
A microwave oscillator comprising a microwave transistor device having at least first and second electrode branch circuits; a carrier plate having first and second planar surfaces for respectively supporting said first and said second electrode branch circuits; means for positioning said transistor device at one end of said plate between said surfaces; and a dielectric resonator positioned proximate to said transistor device for completing a feedback path between said first and said second electrode branch circuits.
Claim 7
Dependent Claim
34 words
A microwave oscillator circuit according to claim 4 wherein the oscillator circuit further comprises spacing means positioned between said transistor device and said dielectric resonator for controlling the coupling between said electrode branch circuits.
Claim 8
Dependent Claim
24 words
A microwave oscillator according to claim 5 wherein said spacing means positioned between said transistor device and said dielectric resonator comprise a dielectric spacer.
Claim 9
Dependent Claim
35 words
A microwave oscillator according to claim 6 wherein said transistor is an npn bipolar junction microwave transistor, and wherein said first and second electrode branch circuits are respectively the emitter circuit and the collector circuit.
Claim 10
Dependent Claim
15 words
A microwave oscillator according to claim 7 wherein said dielectric spacer comprises a quartz annulus.
Claim 11
Dependent Claim
43 words
A microwave oscillator according to claim 8 wherein said dielectric resonator is a circular cylindrical resonator made from barium titanate (Ba 2 Ti 9 O 20 ), and wherein the mode of electrical oscillations in said resonator is the TE 01 δ mode.
Claim 12
Dependent Claim
60 words
A microwave oscillator circuit comprising: a microwave semiconductive amplifying device having separate input and output circuits; a dielectric resonator; and means for positioning said resonator with respect to said input and said output circuits to provide feedback coupling between said input and said output circuits to cause said amplifying device to oscillate at a frequency determined substantially by said resonator.
Claim 13
Dependent Claim
60 words
A microwave oscillator circuit comprising: a microwave semiconductive amplifying device having separate input and output circuits; a dielectric resonator; and means for positioning said resonator with respect to said input and said output circuits to provide feedback coupling between said input and said output circuits to cause said amplifying device to oscillate at a frequency determined substantially by said resonator.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |