Experimental Demonstration of a Broadband Adaptive Processsor for Phased-Array Antennas

摘要

This paper presents experimental results demonstrating adaptive beam forming and jammer nulling for phased-array antenna applications using the Broadband Efficient Adaptive Method for True-time-delay Array Processing (BEAMTAP) algorithm. The BEAMTAP algorithm has the advantage of mapping efficiently into an opto-electronic architecture that minimizes the required number of tapped-delay lines and simultaneously allows for the signals to be processed coherently, assuming that phase stabilization has been achieved. The architecture also utilizes a unique polarization-angle, read-write multiplexing system that allows for 45 dB of total jammer suppression at the output. Successful narrowband and broadband adaptive beam forming and jammer nulling results are provided in the worst-case scenario of co-site interference where both the jamming signal's angle of incidence and spectral content overlap with that of the signal of interest.