Oscillators – With distributed parameter resonator
Patent
1980-03-24
1982-05-11
Grimm, Siegfried H.
Oscillators
With distributed parameter resonator
331107DP, 331107G, H03B 912
Patent
active
043296637
ABSTRACT:
A lumped element microwave oscillator is mounted on the back plate secured to a wave guide for generating electromagnetic waves which propagate through the wave guide. The oscillator includes a two-terminal solid-state device, such as a Gunn diode, which exhibits negative resistance in the microwave range, connected in circuit with a dc source and lumped elements, including a variable capacitive element. The variable capacitive element is accessible without removing the back plate from the wave guide so that the capacitance can be easily adjusted for controlling the frequency of the oscillator. The power of the electromagnetic waves which propagate through the wave guide is preferably controlled by adjusting the coupling between the oscillator and the load in two ways. The physical orientation of various lumped elements mounted on the back plate can be adjusted with respect to the plane of the E field in the wave guide for controlling the coupling between the oscillator and the load in steps. Also, the lateral positional relationship of the back plate with respect to the wave guide can be adjusted for infinitely controlling the coupling between the oscillator and the load.
REFERENCES:
Aitchison et al., "Varactor-Tuned X-Band Gunn Oscillator Using Lumped Thin Film Circuits", Electronics Letters, 25 Feb. 1971, vol. 7, pp. 93-94.
Amoss et al., "A Multiband Lumped-Element Varactor-Tuned Gunn Oscillator", 1977 IEEE International Solid-State Circuits Conference, Feb. 17, 1977, pp. 122-123.
Rubin, "Varactor-Tuned Millimeter-Wave MIC Oscillator", IEEE Transactions On Microwave Theory And Techniques, Nov. 1976, pp. 866-867.
Cohen, "Varactor Tuned Gunn Oscillators With Wide Tuning Range", 1979 IEEE MTT-S International Microwave Symposium, Digest of Papers, May 1979, pp. 177-179.
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