Title :
A finite-difference time-domain method for solving electromagnetic problems with bandpass-limited sources
Author :
Pursel, J.D. ; Goggans, P.M.
Author_Institution :
Dept. of Electr. Eng., Mississippi Univ., MS, USA
fDate :
1/1/1999 12:00:00 AM
Abstract :
The complex-envelope representation of bandpass-limited signals is used to formulate a bandpass-limited vector wave equation and a new finite-difference time-domain (FDTD) scheme that solves the bandpass-limited vector wave equation is presented. For narrow-band electromagnetic systems, this new method allows the time step to be several orders of magnitude larger than current FDTD formulations while maintaining an amplification factor equal to one. Example results obtained by this method are presented and compared with analytic solutions
Keywords :
bandlimited signals; electromagnetic wave propagation; finite difference time-domain analysis; signal representation; signal sampling; wave equations; FDTD; amplification factor; bandpass-limited signals; bandpass-limited sources; complex-envelope representation; electromagnetic problems solution; finite-difference time-domain method; lD free-space filled cavity; lowpass-limited sampling theorem; narrow-band electromagnetic systems; perfect electric conducting walls; plane wave source; vector wave equation; Bandwidth; Electromagnetic scattering; Finite difference methods; Fourier transforms; Frequency; Narrowband; Partial differential equations; Power line communications; Sampling methods; Time domain analysis;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
