Range of validity of transmission line approximations for design of electromagnetic absorbers

Author

Chung, Yeon-choon ; Kim, Byung-Wook ; Park, Dong-Chul

Author_Institution

EMC Group, Korea Res. Inst. of Stand. & Sci., Taejon, South Korea

Volume

36

Issue

4

fYear

2000

fDate

7/1/2000 12:00:00 AM

Firstpage

1188

Lastpage

1192

Abstract

The transmission line approximation (TLA) method has been widely used for the design of electromagnetic absorbers, because it does not need the tremendous calculations required in numerical analysis methods. However, the method has intrinsic application limits as a low-frequency approximation. In this paper, we described full-wave analysis on the periodic structure with a finite element method (FEM) and investigated the accuracy and limitations of TLA by comparing TLA with FEM results for the reflection loss of a dielectric pyramid. It was found that TLA is valid when λ⩾2p, where λ is the wavelength of the frequency of interest and p is the distance between periodic cone arrays

Keywords

electromagnetic wave absorption; finite element analysis; transmission line theory; dielectric pyramid; electromagnetic absorbers; finite element method; full-wave analysis; periodic cone arrays; periodic structure; reflection loss; transmission line approximation; Dielectric losses; Electromagnetic reflection; Finite element methods; Numerical analysis; Periodic structures; Permeability; Permittivity; Surface impedance; Transmission line theory; Transmission lines;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.877652

Filename

877652