现代雷达2018，Vol.40Issue(3)：58-62,5.DOI:10.16592/j.cnki.1004-7859.2018.03.013
基于电流探测的平面近远场变换方法
Planar Near-field to Far-field Transformation Method Based on Current Detection
摘要
Abstract
A method for planar near-field to far-field transformation based on current detection is proposed.The method,to detect the inductive current in the near field of the antenna by using 50 Ω dipole probe,and to convert the radiation electric field integral equation into the cyclic Toeplitz block matrix equation by setting the sampling interval between the near field and the equivalent surface reasonably,and using the Galerkin moment method.The equivalent magnetic flux distribution of the aperture surface of the antenna is obtained by using the conjugate gradient method and the linear convolution calculation.Finally,the far-field pattern distribution of the antenna is calculated according to the equivalent magnetic flux distribution of the antenna surface.By comparing with the antenna simulation numerical results,the near-field current detection of the antenna plane can quickly and accurately obtain the far field of the antenna forward radiation.At the same time,it is only necessary to increase the sampling points to improve the measurement accuracy under the condition of satisfying the Nyquist sampling criterion.Therefore,the proposed method is very reliable and has practical value.关键词
电流探测/平面近远场变换/共轭梯度法/循环Toeplitz块矩阵Key words
current detection/planar near-field to far-field transformation/conjugate gradient method/cycle Toeplitz block matrix分类
信息技术与安全科学引用本文复制引用
高知明,胡宁,周勇,辛彪..基于电流探测的平面近远场变换方法[J].现代雷达,2018,40(3):58-62,5.基金项目
国家自然科学基金资助项目(61601231) （61601231）
江苏省自然科学基金资助项目(BK20140999) （BK20140999）
江苏省气象传感网技术工程中心开放基金资助项目(KDXG1302) （KDXG1302）
