Title :
A modified unsplit PML formulation for evanescent mode absorption in waveguides
Author :
Ozkar, Mete ; Lazzi, Gianluca ; Mortazawi, Amir
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
fDate :
6/1/2003 12:00:00 AM
Abstract :
In this letter, a modified unsplit perfectly matched layer (PML) formulation for the absorption of evanescent waves in waveguides is presented. The proposed formulation combines the advantages of the stretched coordinate and unsplit D - E - H PML formulations, which separates PML conductivities from the properties of the physical materials in the FDTD mesh. Results show that the proposed boundary outperforms the traditional unsplit PML in the evanescent region by 20 to 40 dB.
Keywords :
finite difference time-domain analysis; mesh generation; waveguide theory; FDTD mesh; evanescent mode absorption; modified unsplit PML formulation; perfectly matched layer; stretched coordinate; unsplit D - E - H PML formulations; waveguides; Absorption; Conductivity; Electromagnetic scattering; Electromagnetic waveguides; Finite difference methods; Frequency domain analysis; GSM; Maxwell equations; Time domain analysis; Transmission line matrix methods;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2003.814109
