面向远场计算的波谱射线方法

A New Spectral Domain Method for Far Fields Computation

根据天线远区场对口径波谱的局部依赖特性，引入有效近场的概念，提出一种面向远场计算的波谱射线方法．该法采用波谱射线抽取的方法计算有效近场，通过近场空域积分计算远场，适合于具有雷达罩、透镜等近区散射体的天线远场计算．文中以带罩连续口径及阵列天线的远场方向图计算为例，验证了方法的正确性和有效性．

A new spectral domain method for far fields computation of antennas with near zone catterers such as lens and radomes is presented based on the characteristic that the far fields of antennas locally depend on their angular spectra.The effective near fields, which are introduced to replace the actual near fields in the traditional Plane wave spectrum-surface integration echnique,are calculated efficiently by extracting effective spectral rays only This method is validated by computing far fields of radome enclosed aperture and array antennas