内谐振条件下导体散射特性的双正交模法分析

The Application of Bi-orthogonal Mode Analysis Approach to in Electromagnetic Scattering of Conducting Bodies at Interior Resonances

众所周知，当我们应用积分方程，不论是电场积分方程还是磁场积分方程，去分析导体的散射特性时，在内谐振条件下将出现解答的不唯一性或不稳性问题，给计算工作带来严重的困难。本文提出的双正交模分析方法有效地克服了这一困难，且该方法具有使用简单和概念清晰的优点。

It is well known that when surface integral equations. either E-field integral equations or H-field integral equations, are employed to attack an EM scattering problem of conducting bodies at interior resonances,nonuniqueness or instability problems will appear. A bi-orthogonal mode analysis approach is presented in this paper to avoid the difficulties described above, which possesses the advantages of simplicity in computation and clarity in concept. To show the correctness and effectiveness of the proposed method, a number of scattering problems are analyzed and compared with some published literatures.