Author :
Okoniewski, M. ; Stuchly, M.A. ; Mrozowski, M. ; DeMoerloose, J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
fDate :
2/1/1997 12:00:00 AM
Abstract :
Hybrid numerical techniques in time domain offer computationally efficient means of analysis of certain classes of microwave structures. One of the recently proposed techniques combines the finite-difference time-domain (FDTD) method with the eigenfunction expansion. This method has proven to be very efficient in the analysis of properties of complex planar transmission lines and waveguide discontinuity problems. To achieve full functionality, in particular in the context of the discontinuity analysis, this method has to be complemented by a suitable high-performance absorbing boundary condition. In this letter, we examine a modified Berenger´s perfectly matched layer (PML). Tests in a waveguide indicate that low reflections can be obtained in a wide frequency range with few layers of the absorbing medium with a properly selected conductivity profile
Keywords :
eigenvalues and eigenfunctions; finite difference time-domain analysis; waveguide discontinuities; waveguide theory; absorbing boundary condition; conductivity profile; eigenfunction expansion; finite-difference time-domain method; hybrid numerical technique; microwave structure; modal PML; perfectly matched layer; planar transmission line; reflection; waveguide discontinuity; Boundary conditions; Eigenvalues and eigenfunctions; Finite difference methods; Microwave theory and techniques; Perfectly matched layers; Planar transmission lines; Planar waveguides; Time domain analysis; Transmission line discontinuities; Waveguide discontinuities;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
