Tunable, dielectric-resonator-stabilized oscillator and method of tuning same
First Claim
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1. A tunable, frequency-stabilized oscillator, comprising:
- a negative resistance oscillator circuit having at least one active element; and
at least one dielectric resonator connected in said oscillator circuit having at least one electrically-conductive area on its surface, the selective variation in size of which alters the resonant frequency of said at least one resonator;
said at least one dielectric resonator further comprising;
a. an electrically conductive resonator housing having a resonating cavity therethrough;
b. a resonator body made of dielectric medium;
c. a resonator body mounting plate of thin, rigid dielectric material mounted at one end of said cavity in said housing to mount said resonator body within said cavity; and
d. a tuning plate of thin, rigid dielectric material mounted at the other end of said cavity from said first-mentioned plate, coated with an electrically conductive material whose areal extent over said plate may be selectively varied, whereby the resonant frequency of said dielectric resonator may be finely tuned.
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Abstract
A dielectric-resonator-stabilized, Gallium-Arsenide-FET, negative resistance oscillator operating in the microwave region incorporating an improved form of dielectric resonator whose resonant frequency is tuned by the addition or removal of metal from the surface of a dielectric tuning plate in the resonator, and a method for tuning the oscillator to the desired frequency range with the resonator in place by use of a laser-trimming device are disclosed.
58 Citations
17 Claims
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1. A tunable, frequency-stabilized oscillator, comprising:
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a negative resistance oscillator circuit having at least one active element; and at least one dielectric resonator connected in said oscillator circuit having at least one electrically-conductive area on its surface, the selective variation in size of which alters the resonant frequency of said at least one resonator; said at least one dielectric resonator further comprising; a. an electrically conductive resonator housing having a resonating cavity therethrough; b. a resonator body made of dielectric medium; c. a resonator body mounting plate of thin, rigid dielectric material mounted at one end of said cavity in said housing to mount said resonator body within said cavity; and d. a tuning plate of thin, rigid dielectric material mounted at the other end of said cavity from said first-mentioned plate, coated with an electrically conductive material whose areal extent over said plate may be selectively varied, whereby the resonant frequency of said dielectric resonator may be finely tuned. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A dielectric resonator for use in combination with a frequency-stabilized oscillator of the type which includes an RF oscillator circuit having at least one gallium arsenide field effect transistor as an active element, said dielectric resonator being tuned to a frequency within the resonant frequency region of said oscillator circuit, and a slab-type microstripline transmission line to interconnect said resonator to said oscillator;
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said dielectric resonator having at least one electrically conductive area on its surface the selective variation in size of which alters the resonant frequency of said resonator; said dielectric resonator further comprising; a. an electrically conductive resonator housing having a resonating cavity therethrough; b. a resonator body made of dielectric medium; c. a resonator body mounting plate of thin, rigid dielectric material mounted at one end of said cavity in said housing to mount said resonator body within said cavity; and d. a tuning plate of thin, rigid dielectric material fixedly-mounted to said housing at the other end of said cavity from said first-mentioned plate, coated with an electrically conductive material, whose areal extent over the plate may be selectively varied, whereby the resonant frequency of said dielectric resonator may be finely tuned. - View Dependent Claims (14, 15, 16, 17)
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Specification