H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/36
H03F 3/193 (2006.01) H03F 1/26 (2006.01)
Patent
CA 1284360
ABSTRACT LOW NOISE MICROWAVE AMPLIFIER HAVING OPTIMAL STABILITY, GAIN, AND NOISE CONTROL A gallium arsenide MESFET amplifier circuit employing a parallel feedback network (17) having first (18) and second (20) transmission line section filtering networks connected on either side of a series R-C-R circuit (R1, C, R2). In one optimized embodiment, the transmission line sections each include low and high impedances unequal in length to one- quarter wavelength. The use of two discrete resistors, together with the filtering networks to eliminate thermal noise generated by the resistors, provides optimum gain, low noise, and stable operation over a wide range of microwave frequencies.
608519
Hughes Aircraft Company
Sim & Mcburney
Wong Joseph S.
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