H - Electricity – 03 – B
Patent
H - Electricity
03
B
328/9
H03B 19/14 (2006.01) H03K 23/60 (2006.01)
Patent
CA 1192624
ABSTRACT The presently well-established techniques for down- conversion of microwave signals use heterodyne conversion which relies on mixing a signal from a local oscillator with the micro- wave input signals, microwave varactor frequency dividers and the use of two GaAs MESFETs in a balanced configuration for sub- harmonic division. The heterodyne technique limits the instantan- eous bandwidth that can be down-converted, the varactor divider requires amplifiers to recover the input signal and the use of two MESFETs requires special circuitry on the output to recombine the divided signals from the two drain terminals of individual MESFETs. The present invention overcomes these problems by providing a microwave frequency divider using a single, dual-gate GaAs FET device to perform parametric division and amplification simultaneously at microwave frequencies. The FET constitutes a nonlinear reactance that, when energized, transforms the input signal at fo to an output signal at fo/N.
428876
As Represented By The Ministe R. Of National Defence Her Majesty The Queen In Right Of Canada
Aspila Kalevi P.
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