National Natural Science Foundation of China(Grant Nos.62071187,62071125,and 62301162);Natural Science Foundation of Fujian Province,China(Grant No.2023J01058);Industry-Education Cooperation Project in Fujian Province,China(Grant No.2022H6018);Fujian Province Major Special Topic Project(Grant No.2022HZ026007).
Large-element-spacing(LES)antenna arrays present an attractive proposition with their cost-effectiveness and sim-plified structures.However,they often encounter the challenge of high-level grating lobes.This paper pro...