An Active Phase Shifter for Phased Array Application Sproviding Amplitude and Phase Control

A phase shifter which allows control of magnitude and phase applicable for mobile satellite reception is introduced. It consists of three amplifiers in parallel, each driven by a third of the incoming microwave signal. The phase difference between the three signal paths is 120 degree each. Magnitude and phase of the transfer function are determined by the gain of the amplifiers set by three bias voltages, one for each amplifier. A simple control unit, simplifying the interface to the beam steering unit of the phased array system is introduced too. Array patterns, showing the effect of some magnitude and phase distributions of a 4×l micros trip antenna array are given.