A quasi-static modification of TLM at knife edge and 90/spl deg/ wedge singularities

Author

Cascio, L. ; Tardioli, G. ; Rozzi, T. ; Hoefer, W.J.R.

Author_Institution

Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada

Volume

2

fYear

1996

fDate

17-21 June 1996

Firstpage

443

Abstract

A common drawback of numerical techniques such as TLM and FDTD resides in the difficulty to accurately describe the electromagnetic field in structures with singularities. In this paper a local modification of the 2D-TLM algorithm for the nodes surrounding a knife edge and a 90/spl deg/ wedge is proposed. A quasi-static approximation of the field is used to derive an equivalent circuit of the edge. The proposed corner correction is compared with the uncorrected TLM results and with data available in the literature, revealing a marked enhancement in the accuracy and convergence of the results.

Keywords

Green´s function methods; band-pass filters; equivalent circuits; finite difference time-domain analysis; transmission line matrix methods; waveguide discontinuities; waveguide filters; 2D-TLM algorithm; 90/spl deg/ wedge singularities; FDTD; Green function; TLM; WR(28) waveguide; corner correction; electromagnetic field; equivalent circuit; iris coupled bandpass filter; knife edge singularities; quasi-static modification; Electromagnetic analysis; Electromagnetic fields; Equivalent circuits; Filters; Finite difference methods; Frequency domain analysis; Impedance; Narrowband; Radio frequency; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1996., IEEE MTT-S International

Conference_Location

San Francisco, CA, USA

ISSN

0149-645X

Print_ISBN

0-7803-3246-6

Type

conf

DOI

10.1109/MWSYM.1996.508763

Filename

508763