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应用科学学报 ›› 2001, Vol. 19 ›› Issue (3): 206-209.

• 论文 • 上一篇    下一篇

渐近波形估计技术应用于宽带RCS频率响应的快速获取

童创明, 洪伟, 汪杰   

  1. 东南大学无线电工程系毫米波国家重点实验室, 江苏南京 210096
  • 收稿日期:2000-04-20 修回日期:2000-06-11 出版日期:2001-09-30 发布日期:2001-09-30
  • 作者简介:童创明(1964-),男,湖北黄冈人,副教授,博士后.
  • 基金资助:
    国家杰出青年基金资助项目(69625102)

A Fast Frequency Sweeping Method for RCS Computation Based on AWE Technique

TONG Chuang-ming, HONG Wei, WANG Jie   

  1. State Key Laboratory of Millimeter Waves, Department of Radio Engineering, Southeast University, Nanjing 210096, China
  • Received:2000-04-20 Revised:2000-06-11 Online:2001-09-30 Published:2001-09-30

PDF

103

被引次数

4

摘要： 基于渐近波形估计(AWE)技术和矩量法(MOM)快速预测任意形状导电柱体(PEC)的雷达散射截面(RCS).首先采用矩量法求解导体柱的电场积分方程,得到导体柱在某一给定频率入射波照射下的表面电流,然后通过Pade逼近获得导体柱在任一频率入射波照射下的表面电流,进而计算出RCS.计算结果表明其计算速度可加快近十倍.

关键词: 渐近波形估计技术, 雷达散射截面, 快速扫频, 二维导体柱, 矩量法

Abstract: The method of moments (MOM) in conjunction with the asymptotic waveform evaluation (AWE) technique is applied to predict the radar cross-section (RCS) of an arbitrarily shaped twodimensional (2-D) perfect electric conductor (PEC) cylinder over a frequency band. The electric field integral equation (EFIE) of a 2-D PEC cylinder is solved by using MOM to obtain the equivalent surface current on the PEC cylinder. In the AWE technique, the equivalent surface current at a given frequency is expanded in the desired frequency band in a Taylor's series. The Taylor's series coefficients are then matched via the Pade approximation to a rational function. By using the rational function, the surface current is obtained at any frequency within the frequency range, which is in turn used to calculate RCS of the 2-D PEC cylinder. It was observed that AWE could result in considerable CPU time saving.

Key words: MOM, AWE technique, RCS, 2-D PEC, fast frequency sweeping

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