US4034313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microstrip gunn oscillator with varactor tuning
Assignee: US Philips Corp
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Filing: 1975-05-14
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Granted: 1977-07-05
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Expires: 1995-05-14
Abstract
Abstract A microwave oscillator arrangement comprising a microstrip resonator, a Gunn oscillator mounted outside the substrate of the resonator, a varactor diode connected in series with the Gunn oscillator and the resonator, and means for applying adjustable bias to the varactor diode.
Inventors
- 👤 Stewart Barry Jones
- 👤 Keith Rushworth Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:15
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/141
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
90 words
A microwave oscillator arrangement comprising a dielectric substrate, a microstrip resonator formed on a portion of the substrate, a negative-resistance oscillator device external to the resonator, means for coupling the negative-resistance oscillator device to the resonator, whereby substantially all the R.F. power produced by the negative-resistance oscillator device is fed into the resonator, means for coupling R.F. power out of the resonator into a load, and a variable reactance connected in series between the negative-resistance oscillator device and the resonator whereby to adjust the operating frequency of the oscillator arrangement.
Claim 2
Dependent Claim
90 words
A microwave oscillator arrangement comprising a dielectric substrate, a microstrip resonator formed on a portion of the substrate, a negative-resistance oscillator device external to the resonator, means for coupling the negative-resistance oscillator device to the resonator, whereby substantially all the R.F. power produced by the negative-resistance oscillator device is fed into the resonator, means for coupling R.F. power out of the resonator into a load, and a variable reactance connected in series between the negative-resistance oscillator device and the resonator whereby to adjust the operating frequency of the oscillator arrangement.
Claim 3
Dependent Claim
17 words
An oscillator arrangement as claimed in claim 1 wherein the resonator is a length of microstrip line.
Claim 4
Dependent Claim
15 words
An oscillator arrangement as claimed in claim 2 wherein the microstrip line is open circuited.
Claim 5
Dependent Claim
21 words
An oscillator arrangement as claimed in claim 3 wherein the variable reactance is connected to one end of the microstrip line.
Claim 6
Dependent Claim
21 words
An oscillator arrangement as claimed in claim 1 wherein the means for coupling power out of the resonator comprises a capacitor.
Claim 7
Dependent Claim
22 words
An oscillator arrangement as claimed in claim 5 wherein the capacitor comprises a gap between the resonator and a further strip line.
Claim 8
Dependent Claim
35 words
An oscillator arrangement as claimed in claim 1 wherein the means for coupling R.F. power out of the resonator is immediately adjacent a connection of the means for coupling the negative-resistance device to the resonator.
Claim 9
Dependent Claim
22 words
An oscillator arrangement as claimed in claim 1 wherein the means for coupling the negative-resistance device to the resonator comprises a wire.
Claim 10
Dependent Claim
15 words
An oscillator arrangement as claimed in claim 1 wherein the variable reactance is a varactor.
Claim 11
Dependent Claim
17 words
An oscillator arrangement as claimed in claim 1 wherein the negative-resistance device is an unencapsulated Gunn device.
Claim 12
Dependent Claim
19 words
An oscillator arrangement as claimed in claim 10 wherein the Gunn device is mounted on a thermally conductive screw.
Claim 13
Dependent Claim
25 words
An oscillator arrangement as claimed in claim 1 comprising means for varying the reactance so as to reduce a variation of operating frequency with temperature.
Claim 14
Dependent Claim
18 words
An oscillator arrangement as claimed in claim 12 wherein the means for varying the reactance comprises a thermistor.
Claim 15
Dependent Claim
22 words
An oscillator arrangement as claimed in claim 1 comprising a distributed low-pass filter for applying a D.C. voltage to the negative-resistance device.
Claim 16
Dependent Claim
22 words
An oscillator arrangement as claimed in claim 1 comprising a distributed low-pass filter for applying a D.C. voltage to the variable reactance.
Claim 17
Dependent Claim
45 words
An oscillator arrangement as claimed in claim 1 comprising a gyromagnetic isolating device, having a plurality of ports and wherein the means for coupling R.F. power out of the resonator is arranged to couple the R.F. power into a first port of the isolating device.
Claim 18
Dependent Claim
36 words
An oscillator arrangement as claimed in claim 16 wherein the isolating device is a three-port circulator and wherein a mixer diode is coupled to a second port of the circulator relatively isolated from the first port.
Claim 19
Dependent Claim
18 words
An oscillator arrangement as claimed in claim 17 comprising a distributed low-pass filter connected to the mixer diode.
Claim 20
Dependent Claim
36 words
An oscillator arrangement as claimed in claim 16 wherein the isolating device is a three-port circulator and wherein a matched load is connected to a second port of the circulator relatively isolated from the first port.
Claim 21
Dependent Claim
17 words
An oscillator arrangement as claimed in claim 1 wherein the resonator is formed on a ferrite substrate.
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) | 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 |