Beam steering of an active integrated antenna array utilizing an MMIC oscillator with second harmonic injection.

Abstract

One of the radar functions for the active integrated antenna array for beam steering utilizing harmonic injection into an MIMIC oscillator is described in this paper. The fabricated 2 X 2 active integrated antenna array was locked by an external signal at frequency one half with respect to the fundamental operating frequency of the MIMIC oscillator. Its beam steering operation was also confirmed by changing the frequency of the injection signal. A 10 degree beam variation was observed within the injection locking range of 3.90MHz. From these results, the fundamental data for realization of the millimeter-wave radar systems using the MMIC with low-cost and simple structure were obtained.