A MMIC 4X2 switch matrix for 0.5–3GHZ application

A Monolithic microwave integrated circuit (MMIC) 4X2 switch matrix using 0.5um GaAs PHEMT process has been designed for 0.5-3GHZ application. This switch matrix is composed of four special SPDT switches and a 4-bit logical decoder integrated on a single chip. Inductive Bonding wire and package parasite effect are also taken into consideration. This switch matrix is designed to be controlled by positive voltage. The designed switch matrix shows good performance under all working conditions: the insertion loss is less than 5dB, the isolation is no worse than 30dB, the return loss is better than -12dB, the P1dB is better than 26dBm. The chip size of designed switch matrix is only 1.45mm*1.45mm.