NETWORK APPROACH FOR REDUCING THE NUMBER OF PHASE SHIFTERS IN A LIMITED SCAN PHASED ARRAY

摘要

An arrangement for scanning of an array by means of controllable phase shifters. A network approach is used to substantially reduce the number of phase shifters required for a limited-scan array. Each phase shifter output is distributed over more than one antenna element of the array. The concept is applicable to both one-dimensional and two-dimensional scanning. The grating lobes of the array factor are allowed to exist in real space but are excluded from the scan region by selecting the subarray spacing. The network is designed to suppress other grating lobes in real space.