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

Volume

2

fYear

1996

fDate

21-26 July 1996

Firstpage

1308

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1996. AP-S. Digest

Conference_Location

Baltimore, MD, USA

Print_ISBN

0-7803-3216-4

Type

conf

DOI

10.1109/APS.1996.549837

Filename

549837