随机馈相法对相控阵天线增益和指向精度的影响  

Impact of Random Phase Feeding Methods on Gain and Beam Pointing Accuracy of Phased Array Antenna

作　　者：张胜辉[1] 余鹏程[2] 杨鹏[2] 陈劫尘[1] 

机构地区：[1]航天恒星科技有限公司,北京100086 [2]电子科技大学,成都611731

出　　处：《航天器工程》2014年第3期67-71,共5页Spacecraft Engineering

基　　金：国家重大科技专项工程

摘　　要：分别以2位和3位数字移相器为例,研究了四舍五入法、适当随机量化法和预加相位法等3种随机馈相法,对均匀微带直线阵列的增益方向图和波束指向精度的影响,研究证明相对于四舍五入馈相方法,适当随机量化法和预加相位法能够极大地提高波束指向精度,但是在移相器位数较少的情况下增益会有少许损失。研究结果可为大型相控阵天线的设计提供参考。In this paper, the impacts of appropriate random phasing method, phase-adder method, and rounding phase feeding method on the gain and beam pointing accuracy of a uniform linear ar- ray using 2 and 3-bit digital phase shifter are studied. It is shown that the appropriate random phasing method and phase-adder method can achieve a much better beam pointing accuracy than the rounding phase feeding method, while there will be a little loss of the gain when using less bit phase shifter. This result can be used in the design of phased array antennas.

关 键 词：相控阵天线 四舍五入法 适当随机量化法 预加相位法 波束指向精度 

分 类 号：TN821.8[电子电信—信息与通信工程]