Oscillators – Combined with particular output coupling network – Space discharge or unilaterally conductive device in output...
Patent
1983-05-05
1985-05-21
LaRoche, Eugene R.
Oscillators
Combined with particular output coupling network
Space discharge or unilaterally conductive device in output...
331 99, 331105, 331107SL, 331117D, H03B 518, H03B 104
Patent
active
045189315
ABSTRACT:
A microwave transistor oscillator/doubler comprising a Field-Effect Transistor with Terminals G, D and S in combination with a coupling network connected to the terminals G, D and S and composed of microstrip lines with lengths equal to a quarter wavelength at the second harmonic of a fundamental frequency. The doubler further comprises a bias circuit for supplying appropriate voltages to the FET terminals, and an impedance coupler for coupling from the FET D-S terminals to a waveguide load. The coupling network optimizes feedback at the second harmonic between the D-S and G-S ports of the FET to prevent destructive harmonic feedback interaction with the desired signal while providing optimum conditions for feedback at the fundamental frequency. The bias circuit is connected to the coupling network and includes a second network of transmission line elements of lengths equal to a quarter wavelength at the fundamental in order to prevent dissipation of the fundamental frequency therein.
REFERENCES:
patent: 3680002 (1972-07-01), Quine
patent: 3921056 (1975-11-01), Mahoney
patent: 4149127 (1979-04-01), Murakami et al.
patent: 4199734 (1980-04-01), Dressen
patent: 4310809 (1982-01-01), Buck et al.
patent: 4321560 (1982-03-01), Nishikawa et al.
patent: 4357582 (1982-11-01), Ishihara et al.
Schellenberg, et al., entitled "A 69 GHz FET Oscillator", IEEE MTT-S Symposium, pp. 328-330, 1981.
Stancliff, et al., entitled, "Harmonic Load-Pull", pp. 185-187, 1979.
Gupta, et al., entitled, "Performance and Design of Microwave FET Harmonic Generators", IEEE Transactions on Microwave Theory and Techniques, vol. MTT-29, No. 3, Mar., 81, (pp. 261-263).
Willing, et al., IEEE Transactions on Microwave Theory and Techniques, vol. MTT-26, No. 12, Dec. 1978, pp. 1017-1023, "A Technique for Predicting Large-Signal Performance of a GaAs MESFET".
Rauscher, et al., IEEE Transactions, on Microwave Theory and Techniques, vol. MIT-27, No. 10, Oct. 1979, pp. 834-840, "Simulation of Nonlinear Microwave FET Performance Using A Quasi-Static Model".
Beers Robert F.
Ellis William T.
LaRoche Eugene R.
Mis D. C.
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