天线相位中心的精确优化算法
发布时间：2018-12-28 09:49
【摘要】：天线相位中心对于天线的定位和高精度测量影响很大,为此,笔者提出一种计算天线相位中心的优化方法.先假定相位中心在某个坐标点,再以该点为球心作一个投影球面,根据测量点的相位推测其在投影面上的相位,将所有投影相位与其平均值差值的平方和作为目标函数,最后通过共轭梯度法或者遗传算法等优化出相位中心的精确坐标.该方法不需要反复测量天线相位,一次测量后即可准确求出相位中心的坐标,通过一个对称振子天线和一个喇叭天线的数值结果验证了该方法的准确性.
[Abstract]:The effect of antenna phase center on antenna location and high precision measurement is very great. Therefore, an optimization method for calculating antenna phase center is proposed. Assuming that the phase center is at a certain coordinate point, and then using the point as the center of the sphere to make a projection sphere, the square sum of the difference between all the projection phases and its average value is taken as the objective function, and the phase on the projection plane is estimated according to the phase of the measuring point. Finally, the exact coordinates of phase center are optimized by conjugate gradient method or genetic algorithm. This method does not need to measure the antenna phase repeatedly, the coordinates of the phase center can be accurately obtained after one measurement. The accuracy of the method is verified by the numerical results of a symmetrical dipole antenna and a horn antenna.
【作者单位】： 西安电子科技大学天线与微波技术重点实验室;
【基金】：国家自然科学基金资助项目(61072018,60901030) 中央高校基本科研业务费专项资金资助项目(K50511020032)
【分类号】：TN820
本文编号：2393803
[Abstract]:The effect of antenna phase center on antenna location and high precision measurement is very great. Therefore, an optimization method for calculating antenna phase center is proposed. Assuming that the phase center is at a certain coordinate point, and then using the point as the center of the sphere to make a projection sphere, the square sum of the difference between all the projection phases and its average value is taken as the objective function, and the phase on the projection plane is estimated according to the phase of the measuring point. Finally, the exact coordinates of phase center are optimized by conjugate gradient method or genetic algorithm. This method does not need to measure the antenna phase repeatedly, the coordinates of the phase center can be accurately obtained after one measurement. The accuracy of the method is verified by the numerical results of a symmetrical dipole antenna and a horn antenna.
【作者单位】： 西安电子科技大学天线与微波技术重点实验室;
【基金】：国家自然科学基金资助项目(61072018,60901030) 中央高校基本科研业务费专项资金资助项目(K50511020032)
【分类号】：TN820
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