Beam Pattern Analysis of Hybrid Frequency Diverse and Phased Array

Abstract

The conventional frequency diverse array has range and angle coupled S-shaped spatial distribution. When transmitting and receiving operations are taken into account together, only energies in the target direction are concerned. To better support this condition, a transmit hybrid array is proposed in this paper with a dotshaped beam pattern. The hybrid array is composed of a frequency diverse subarray (FDSA) and a phased subarray (PSA). If the frequency increment of FDSA is linearly increased, the beam pattern of the hybrid array exhibits a periodicity in the range dimension. Moreover, if the frequency increment of FDSA is logarithmically increased, it yields a single maximum pointing at the target location with improved azimuthal resolution.