A One Watt CW, 20% Efficient X-Band Avalanche Diode Amplifier

Efficient solid state X- band power generation can be accomplished by utilizing the negative impedance characteristics of avalanche diodes in reflection amplifiers. Breadboard 7 GC circuits have been constructed which exhibit low level gains of 13 db with 500 mc of bandwidth. Power outputs of 1 w cw, with 5 db of gain and 20% conversion efficiency have been realized in the same circuit.