摘要
根据卫通天线对波束宽度和扫描精度要求,提出了在低位数移相器的情况下,利用虚移相技术实现的高精度波束扫描方案。通过阵元输出算法加权,利用低位数移相器在不同算法下的排列组合,使阵列天线主波束满足需求。分析比较了不同加权算法的优劣,调整了移相器阵列的分布方式,使扫描精度达到半主波束宽度的要求。仿真结果验证了采用的方案以及算法的有效性。
A phased-array antenna has been proposed with adopting virtual phase shifting technology to achieve the narrow main beam width and high-precision scan step required for terrestrial-satellite communication.Through algorithm weighted to the output of the array unit,adopting the limited bit phase shifter permutations in different algorithm,the antenna main beam width can meet actual demands.Based on the comparisons between different weights algorithm,the distribution of the phase shifters has been adjusted to meet the demanded half beam width scan accuracy.Simulation results show that the design and the algorithm are effective.
出处
《微波学报》
CSCD
北大核心
2011年第4期45-48,共4页
Journal of Microwaves
基金
国家自然科学基金(60673143)
浙江省科技计划(2006C21020)项目
关键词
虚移相技术
算法加权
相移精度
virtual phase shifting technology
algorithm weighted
phase shift accuracy
