Method and apparatus for compensating non-linear phase shift thr

Amplifiers – Hum or noise or distortion bucking introduced into signal...

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328162, 333 241, H03F 126

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044881223

ABSTRACT:
A device comprising a microstrip including a narrow conductor connected in series between a circuit input terminal and the power amplifier, a film of ferrimagnetic material positioned adjacent the conductor and magnetic biasing means. The biasing means normally biases the ferrimagnetic material to operate at frequencies about a selected center frequency for nonlinearly enhancing RF input signals as a function of input amplitude. The device normally, undesirably provides nonlinear phase shifts to the input signal as a function of input power at frequencies removed from the center frequency. By choice of the amount of the bias, for a particular input signal frequency, the device can be adjusted to produce phase shift which changes as a function of input power to offset the nonlinear phase shift of the RF amplifier.

REFERENCES:
patent: 3150334 (1964-09-01), Petrossian
patent: 3332042 (1967-07-01), Parris
patent: 3654576 (1972-04-01), Buck
patent: 3747031 (1973-07-01), Ohm
patent: 3755754 (1973-08-01), Putz
patent: 3924206 (1975-12-01), Fassett
"A Magnetostatic Wave Signal-to-Noise Enhancer", by J. D. Adam and S. N. Stitzer, Appl. Phys. Lett., 36(6), Mar. 15, 1980.
"Magnetostatic Surface Wave Signal-to-Noise Enhancer", by S. N. Stitzer, H. Goldie, J. D. Adam, P. R. Emtage, Westinghouse Electric Corporation.
"Magnetostatic Surface Wave Signal-to-Noise Enhancer", Westinghouse Defense and Electronic Systems Center Technical Report No. AFWAL-TR-80-1110, Oct. 1980.

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