天線相位中心的精確優(yōu)化算法
發(fā)布時間:2018-12-28 09:49
【摘要】:天線相位中心對于天線的定位和高精度測量影響很大,為此,筆者提出一種計算天線相位中心的優(yōu)化方法.先假定相位中心在某個坐標點,再以該點為球心作一個投影球面,根據(jù)測量點的相位推測其在投影面上的相位,將所有投影相位與其平均值差值的平方和作為目標函數(shù),最后通過共軛梯度法或者遺傳算法等優(yōu)化出相位中心的精確坐標.該方法不需要反復測量天線相位,一次測量后即可準確求出相位中心的坐標,通過一個對稱振子天線和一個喇叭天線的數(shù)值結果驗證了該方法的準確性.
[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.
【作者單位】: 西安電子科技大學天線與微波技術重點實驗室;
【基金】:國家自然科學基金資助項目(61072018,60901030) 中央高;究蒲袠I(yè)務費專項資金資助項目(K50511020032)
【分類號】:TN820
本文編號: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.
【作者單位】: 西安電子科技大學天線與微波技術重點實驗室;
【基金】:國家自然科學基金資助項目(61072018,60901030) 中央高;究蒲袠I(yè)務費專項資金資助項目(K50511020032)
【分類號】:TN820
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