A finite-difference time-domain method for solving electromagnetic problems with bandpass-limited sources

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 met...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation Vol. 47; no. 1; pp. 9 - 15
Main Authors: Pursel, J.D., Goggans, P.M.
Format: Journal Article
Language:English
Published: IEEE 01.01.1999
Subjects:
Amplification
Antennas
Bandwidth
Electromagnetic scattering
Exact solutions
Finite difference method
Finite difference methods
Finite difference time domain method
Fourier transforms
Frequency
Mathematical analysis
Narrowband
Partial differential equations
Power line communications
Representations
Sampling methods
Time domain analysis
Wave equations
ISSN:0018-926X
Online Access:Get full text
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Summary: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.
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ISSN:0018-926X
DOI:10.1109/8.752978