MICROWAVE FREQUENCY MULTIPLIER

摘要

PROBLEM TO BE SOLVED: To provide a microwave frequency multiplier, where production of spurious oscillation due to a parasitic inductance of a conductor connecting a control input terminal of a transistor(TR) to ground can be prevented. SOLUTION: A damping resistor 20 is connected between the drain D of a FET 10 and one terminal T3 of an external output transmission line 13, and a damping resistor 21 is connected between the drain D of a FET 11 and the one terminal T3 of the external output transmission line 13. The source of the FET 10 and the gate of the FET 11 are connected to ground plate on a rear side of substrate through via holes respectively. When a multiplied frequency exceeds 20 GHz, the via holes have parasitic inductances 23, 24.