Title :
Treating the instabilities in marching-on-in-time method from a different perspective [electromagnetic scattering]
Author :
Sadigh, Ali ; Arvas, Ercument
Author_Institution :
Dept. of Electr. & Comput. Eng., Syracuse Univ., NY, USA
fDate :
12/1/1993 12:00:00 AM
Abstract :
A general method is presented to treat the instabilities which are frequently observed in the electromagnetic transient solutions using the marching-on-in-time method. The basic idea is to apply an finite impulse response (FIR) filter with a constant group delay during the course of marching-in-time. An electric field integral equation (EFIE) formulation for perfectly conducting bodies is used as a vessel to demonstrate the method. Sample numerical results are presented and discussed. The computed results, while showing good agreement with the data obtained from other methods, present great stability improvement
Keywords :
digital filters; electromagnetic wave scattering; filtering and prediction theory; integral equations; numerical analysis; stability; time-domain analysis; EFIE; FIR filter; constant group delay; electric field integral equation; electromagnetic scattering; electromagnetic transient solutions; finite impulse response filter; instabilities; lowpass filter; marching-on-in-time method; numerical results; perfectly conducting bodies; time domain analysis; Conductors; Digital filters; Electromagnetic scattering; Electromagnets; Finite difference methods; Finite impulse response filter; Integral equations; Moment methods; Resonance; Stability criteria;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
