Abstract: A switching regulator type power supply, including a series switching element which, when energized, provides a voltage signal to an averaging filter, the output of which is applied to follow-on inverter and filtering circuits to produce a desired output voltage. In the startup mode of the supply, the switching element is energized by a circuit portion functioning as a blocking oscillator. The control action of the blocking oscillator results in a series of incremental increases in the voltage output of the averaging filter, thus avoiding large startup currents. When the output of the averaging filter reaches a predetermined first level, an error amplifier circuit is initiated, which forces the circuit portion to function as a constant current switched amplifier.

Abstract: A microwave diplexer apparatus for handling simultaneously two independent polarized transmitted signals at one frequency and two independent polarized received signals at a lower frequency. In the transmit mode of operation, a pair of input signals are applied to a first orthogonal mode transducer wherein the electric fields of the signals are established at right angles to each other. The orthogonal, linearly-polarizer signals are then transformed by a pin/ridge-loaded circular polarizer device to oppositely-rotating circularly-polarized signals and coupled via an antenna port of a second orthogonal mode transducer to an antenna for transmission to a desired target.