Power-pattern synthesis in time modulated semicircular arrays

In this paper, the time modulation technique is extended to circular antenna arrays. The TMSA is adopted to synthesize a flat-topped pattern and scanning sum beams with lower amplitude excitation dynamic-range ratios or even uniform amplitude excitations, as compared to those of the CSA. The studies show that TMCA is a promising approach in synthesizing flat-topped pattern or scanning sum patterns and can be easily extended to synthesize other shaped power patterns.