The Design and Implementation of Sub-arrayed Phased Array Antenna for LEO Satellite
基于子阵列的低轨星载多波束相控阵天线的设计与实现

This paper presents a practical scheme of equal flux beams coverage and frequency multiplex according to CDMA standard utilized by LEO satellites, which can reduce the effect of “corner problem” and “near and far problem”. Genetic algorithm is adopted to realize the synthesis of hexagonal antenna, based on “sub-array” theory. The partition of sub-array in beam-space or element-space can reduce the number of beam-forming coefficients. A multiplex structure for beam-forming network is proposed, which can reduce the resource consumption by 67%. Ultimately a phased array antenna (TX) is designed. The experiment result demonstrates that all the parameters of phased array antenna are consistent with the target of design, which validates the rationality and feasibility of genetic algorithm.