도체의 무조건 안정된 전자파 과도산란 해석

Unconditionally stab le A n a lysis of Transient islectromagnetic Scattering from Conductor

In this paper, we present a tim e-dom ain combined field integral equation(CFIE) form ulation for analyzing transient electromagnetic responses from three—dim ensional(3—D) closed conducting bodies. Instead of the conventional m arcm ng-on in tim e(M O T ) technique, the solution method in this paper is based on the Galerkins method that involves separate spatial and temporal testing procedure. T riangular patch basis functions are used for spatial expansion and testing functions for arbitrarily shaped 3-D structures. The time-domain unknown current coefficient is approximated by using an orthonormal basis function set that is derived from the Laguerre functions. These basis functions are also used as temporal testing functions. The m ethod to be described results in very accurate and stable transient responses from conducting objects w ithout an internal resonance. Detailed mathematical steps are included and representative numerical results are presented and compared.