旋转抛物面天线馈源相位中心的仿真分析  

The simulation and research on feed's phase center of rotating parabolic antennas

作　　者：汪泉弟[1] 罗宏伟[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《重庆大学学报（自然科学版）》2013年第4期45-50,共6页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(50877081)

摘　　要：针对工程中确定抛物面天线馈源近似相位中心的实际困难,提出了一种确定圆锥喇叭馈源近似相位中心的仿真计算方法。该方法通过在反射器的焦点附近沿轴线移动馈源,当抛物面天线增益的计算结果最大时,该位置便是馈源的近似相位中心。建立了旋转抛物面天线的仿真模型,对所选的高斯脉冲激励的设置进行了阐述,分析了馈源相关参数的计算。在4～5GHz频率范围内,选取6个频点进行了仿真研究,计算获得了对应频点的近似相位中心的位置和天线增益,然后分别对6个相位中心位置进行全频段仿真,最后确定了在4～5GHz频段内馈源的最佳近似相位中心的位置。方法可用于不同类型的抛物面天线,为抛物面天线馈源位置的确定提供有益的指导。A simulation method confirming the approximate phase center of a conical horn feed is proposed for purpose of determining the phase center of the feed of the parabolic antenna.The position of similar phase center of the feed can be found by moving the feed along the axis near the focus of the reflector when the gain of the parabolic antenna is maximal.The simulation model of a rotating parabolic antenna is established,the selected Gauss impulse excitation is illustrated,and the relevant parameters of the feed calculation are analyzed.Six frequency points from 4 GHz to 5 GHz is selected for simulation,and the approximate phase center position corresponding to the frequency points is calculated.The simulation results indicate that the best position of the approximation phase center of the feed is found by simulating the six phase center in all bands.The presented method can provide reference for solving others parabolic antennas.

关 键 词：旋转抛物面天线 馈源 高斯脉冲 相位中心 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]