Design of Phase and Amplitude Controlled Circuits for Active Phased-Array RF Beamforming Networks

In this study, for an 8 co-channel beamforming structure in S-band, the phase and amplitude adjustment block and, first and final stage true time delay (TTD) blocks are defined as sub-blocks by AWR (Applied Wave Research) simulation program were examined separately. The simulation results of the performance of the phase shifter for the phase and amplitude adjustment block, the performance of the digital attenuator, the phase change as per the attenuating steps, the TTD block gain, true time delay and return losses were interpreted. Input and output return loss values for all TTD steps were obtained at levels better than -10 dB.