a high power pin diode single pole double throw switch for use in radar systems transmitting at over 50 watts of power . these systems require a switch that will provide adequate isolation for the sensitive amplifier circuits in the receiver subsystem of the radar from the high power transmit pulses in the event there is a bias failure such that the pin diodes are at zero bias . by utilizing one single pole single throw switch assembly between the transmitter and the antenna and at least two spst switch assemblies between the antenna and the receiver , this isolation is achieved .