三维感应场率有限长柱体阵列高功率微波辐照特性分析

Scattering analysis on parallel metal cylinders irradiated by high power microwave based on three-dimensional induced field ratio

为了研究高功率微波对平行柱体阵列的辐照特性,提出一种分析有限长柱体阵列散射特性的三维感应场率法。基于矩量法分析柱体的散射场,建立了有限长柱体的三维感应场率模型,并反推出产生散射场的等效辐射电流。借鉴细线天线的阻抗分布规律,推导出柱体不同位置的分布电流,构成以柱体长度、半径以及观察角度为参数的感应场率矩阵。基于此,实现不同间距和长度的三根平行柱体的散射分析,并将计算结果与矩量法进行对比验证。结果表明,采用三维感应场率方法,只需计算单根柱体的感应场率矩阵,即可得出不同间距、不同长度柱体阵列的散射场,验证了三维感应场率法分析柱体阵列辐照特性的可行性。

To study the reaction of the complex metal cylinders irradiated by high power microwave, a three-dimensional in- duced field ratio （IFR） algorithm for analyzing the scattering field of the finite length parallel cylinders is presented. A three- di- mensional induced field ratio model is established to calculate the scattering fields by method of moments （MoM）, and equivalent radiation currents are derived. The impedance distribution of a thin wire antenna is taken for reference to deduce the distribution on the thin cylinders. The induced field ratio matrix related to the length and the radius of cylinders and observation angle is de- rived. Three parallel cylinders are arranged to obtain the scattering field of an array composed of cylinders with different length and distance as exemplified. The accuracy is proved by comparing the results with that from MoM. The induced field ratio matrix is only needed, which accelerates the computing with high accuracy, to obtain the scattering field of the array consisting of cylin ders with different distance and length.