基于子阵结构的卫通抗干扰天线技术

Anti⁃jamming Antenna Technology for Satellite Communication Based on Sub⁃array Structure

与传统的自适应抗干扰天线不同,提出了在子阵内进行相控阵波束指向,子阵间再完成自适应抗干扰的天线结构,能满足中、大规模天线阵列指向约束和抗干扰的需求。以25单元S卫通天线为研究对象,采用5子阵结构设计。仿真和测试结果表明,子阵结构的抗干扰天线技术能在自适应抗3个干扰的同时,输出信噪比的损失不超过3 dB。相比全阵结构的抗干扰天线,这种子阵结构极大地减少了下变频、数字采样、抗干扰算法的软硬件规模,降低了天线成本、重量和功耗。

Different from the traditional adaptive anti-jamming antenna,a novel phased array which beam form within the sub-array,and then achieves adaptive anti-jamming between the sub-ar⁃ray.This antenna structure can satisfy the requirement of beam pointing constraints and anti-jamming for medium or large-scale antenna array.Research on the S-band satellite communication antenna which has the 25 elements,and divide the full array into 5 sub-arrays,the simulated and experimental results show that the sub-array structure not only can accomplish the adaptive anti-jamming,but also can maintain the signal-to-noise ratio of the useful signal output.Compared with the anti-interference performance of the full array,the sub-array structure greatly reduces the scale of hardware and the size of software such as the conversion,digital sampling and anti-jamming algorithm,decreases the cost,weight and power consumption of the antenna.