Oscillators – With distributed parameter resonator – Parallel wire type
Patent
1992-07-14
1994-05-03
Grimm, Siegfried H.
Oscillators
With distributed parameter resonator
Parallel wire type
331117D, 331117FE, H03B 518
Patent
active
053091191
ABSTRACT:
An improved oscillating circuit for use in microwave frequency bands has reduced power loss and is made smaller in vertical size. The local oscillating circuit includes an MMIC oscillator which comprises a FET, and a resonator connected thereto so as to stabilize the oscillating frequency of the oscillator. The resonator is ring-shaped and arranged as close as several .mu.m to several tens of .mu.m to a predetermined position of a micro strip line forming a feedback loop connected to the FET forming the oscillator. Moreover, the resonator is a thin film formed by depositing a high-temperature superconducting material. As exemplary embodiments, YBCO, niobium and the like, can be used as high-temperature superconducting materials. Furthermore, a portion of the micro strip line, closest to the resonator, is concentrically disposed therewith to form a circular arc portion whose central angle is set at 90 degrees.
REFERENCES:
patent: 4185252 (1980-01-01), Gerlach
patent: 4749963 (1988-06-01), Makimoto et al.
patent: 5115210 (1992-05-01), Cummings et al.
Roth et al, "A Varactor-Tuned Oscillator Using MMIC Technology", Microwave Journal, vol. 33, No. 9, Sep. 1990, pp. 223-225.
Grimm Siegfried H.
Sumitomo Electric Industries Ltd.
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