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

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.