Design, fabrication and performance analysis of TTD structures for S-band active phased array RF beamforming networks

Abstract

In this study an eight-channel active analog beamforming structure is designed and developedin subsystems by using an Applied Wave Research (AWR) simulation program. This structureworks in S-band and contains true-time-delay (TTD) systems. The simulation results and theresults obtained from the manufactured structure are compared. In the comparison, the TTDvalues for different time delay steps and phase difference measurements between channels areanalyzed and interpreted. The test results show that desired performance is obtained from thedesigned and manufactured PCB. However, it is observed that feeding each antenna elementwith single channel beamforming board would be more appropriate.