A New Differential Pattern Steering Method of Nonlinear Active Antenna Array

Phased array used in spacecraft must be lightweight, high efficiency, high integration and low profile, nonlinear active antenna array which have these merits is suitable for the case. This paper studies a two-beam scanning system of nonlinear active array based on injection-locking technique. Firstly, the article reviews the theory of injection-locking technique, then we analyze basic method of differential pattern steering, computer simulations are used to verify the realization. At last, four channels nonlinear active antenna array based on injection-locking oscillators is designed and the validity of two-beam scanning system is also proved by the measurements of radiation pattern.