Oscillators – Combined with particular output coupling network – Wave filter
Patent
1990-06-07
1991-10-22
Grimm, Siegfried H.
Oscillators
Combined with particular output coupling network
Wave filter
331 96, 331107DP, 331107G, 331177V, H03B 912
Patent
active
050599275
ABSTRACT:
An oscillator operational in the millimeter wave and microwave range, including frequencies greater than 60 GHz, is provided with reduced phase noise by enhancing Q of the resonant circuitry by reactively terminating fundamental frequency oscillation and increasing stored fundamental frequency energy in the resonant circuitry. A two frequency system is provided with constructive reflection of energy at fundamental frequency back to the resonant circuitry, and with isolation of fundamental frequency energy from the output load. Energy to the output load is obtained from the in-situ generated second harmonic of the active element. Phase noise is reduced by enhancing Q by more than an order of magnitude.
REFERENCES:
patent: 4025881 (1977-05-01), Cohen et al.
patent: 4246550 (1981-01-01), Cohen
patent: 4728907 (1988-03-01), Cohen
"1990 Millimeter Wave Products", Hughes Aircraft Co., Microwave Products Division, 3100 Fujita St., P.O. Box 2940, Torrance, Calif. 90509-2940, printed Jun. 1989.
"A High Q Cavity Stabilized Gunn Oscillator at 94 GHz", H. Barth, IEEE MTT-S International Microwave Symposium Digest, IEEE Catalog 86CH2301-0, ISSN0149645X, pp. 179-182, Jun. 1986.
"26 to 60 GHz Channelized Receiver Meets Surveillance Requirements", P. Meier et al, Microwave System News, Dec. 1981, pp. 60-80.
"Microwave Oscillator Noise Reduction by a Transmission Stabilizing Cavity", J. R. Ashley & C. Searles, IEEE Trans. MTT, vol. MTT-16, No. 9, Sep. 1968, pp. 743-748.
"Loaded Q Factor Measurements on Gunn Oscillators", Warner & Hobson, Microwave Journal, Feb. 1970, pp. 46-53.
"Wide Range Tuning of Solid State Microwave Oscillators", D. Cawsey, IEEE Journal of Solid State Circuits, Apr. 1970, pp. 82-84.
"Injection Locking of Microwave Solid State Oscillators", K. Kurokawa, Proceedings of the IEEE vol. 61, No. 10, Oct. 1973, pp. 1386-1410.
"Microwave Oscillator Circuits", S. Hamilton, Microwave Journal, Apr. 1978, pp. 63-66 and 84.
"FM and AM Noise in Microwave Oscilators", S. Hamilton, Microwave Journal, Jun. 1978, pp. 105-109.
Phaselock Techniques, F. Gardner, John Wiley & Sons, New York, 1979, pp. 1-7, 72.
"Varactor Tuned Gunn Oscillators with Wide Tuning Range for the 25 to 75 GHz Frequency Band", L. Cohen, IEEE-MIT-S Int'l Microwave Symposium, Apr. 1979, pp. 1-3.
"A Wideband, Backshort-Tunable Second Harmonic W-Band Gunn-Oscilator", H. Barth, 1981 IEEE MTT-S Symposium Digest, pp. 334-337.
"Stabilization of a W-Band Microstrip Oscillator By A Dielectric Resonator", G. Morgan, Electronic Letters, Jun. 24, 1982, vol. 18, No. 13, pp. 556-558.
Microwave Receivers and Related Components, J. Tsui, Air Force Wright Aeronautical Laboratories, Library of Congress Cat. #83-600566, 1983, p. 482.
"Active Phase Shifters for The Millimeter and Microwave Bands", L. Cohen, 1984 IEE MTT-S Digest, pp. 397-399.
"Wideband Electronically Tunable GaAs Gunn VCO's at W-Band (75-110 GHz)", J. Ondria, 1985 IEEE MTT-S Symposium Digest, pp. 375-378.
"Frequency/Temperature Compensated Millimeter-Wave Oscillators and Broadband VCO's In Lumped-Element and Printed-Circuit Forms", L. Cohen, et al, IEEE MTT-S International Microwave Symposium Digest, 1986, pp. 169-172.
Avantek Product Guide Catalog, 1987, p. 67.
"Recent Advances in the Modelling and Performance of Millimeter Wave InP and GaAs Gunn VCO's and Oscilators", L. Cohen and E. Sard, IEEE-MTT-S International Microwave Symposium Digest, 1987, pp. 429-432.
"4 to 40 GHz Even Harmonic Schottky Mixer", J. Merenda et al, 1988 IEEE MTT-S International Microwave Symposium Digest, pp. 695-698.
"CMW Series Wideband Electronically-Tuned Gunn Oscillators", Central Microwave Company, Maryland Heights, Mo., Jun. 1988.
"Millimeter Wave, Lumped Element, Gunn VCO's With Ultrawide-Band (20 GHz) Tuning", L. Cohen and E. Sard, 1989 IEEE-MTT-S International Microwave Symposium, Jun. 13-15, 1989, pp. 1927-1930.
Ail Systems, Inc.
Grimm Siegfried H.
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