Title :
FDTD modal field generation and absorption in homogeneous waveguides with arbitrary cross section
Author :
Myun-Joo Park ; Sangwook Nam
Author_Institution :
Dept. of Electron. Eng., Seoul Nat. Univ., South Korea
Abstract :
A new absorbing boundary condition (ABC) used to absorb the modal field is proposed in the FDTD simulation of homogeneous waveguides with arbitrary cross section and conducting boundary together with a method to find the modal field distribution. A new modal ABC with a closed-form discrete Green´s function is used for the effective mode absorption. The modal transverse field distribution and the cutoff frequency which are needed for the ABC implementation are calculated through the two dimensional FDTD simulation. The proposed method is verified through the simulation of a ridged waveguide.
Keywords :
digital simulation; electromagnetic fields; electromagnetic wave absorption; finite difference time-domain analysis; ridge waveguides; simulation; waveguide theory; 2D FDTD simulation; absorbing boundary condition; closed-form discrete Green´s function; cutoff frequency; effective mode absorption; homogeneous waveguides; modal ABC; modal field absorption; modal field generation; modal transverse field distribution; ridged waveguide; waveguide cross section; Absorption; Convolution; Cutoff frequency; Finite difference methods; Modal analysis; Planar waveguides; Rectangular waveguides; Shape; Tellurium; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1996. AP-S. Digest
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-3216-4
DOI :
10.1109/APS.1996.549837
