Estimation of E-field distribution in a loaded GTEM cell

Author

Ishigami, Shinobu ; Harima, Katsushige ; Yamanaka, Yukio

Author_Institution

EMC Group, Commun. Res. Lab., Kanagawa, Japan

Volume

1

fYear

2001

fDate

2001

Firstpage

129

Abstract

The E-fields in a loaded GTEM (gigahertz transverse electromagnetic) cell and an anechoic chamber with an equipment under test (EUT) were calculated by using the FDTD (finite-difference time-domain) method at frequencies of up to 1 GHz when the EUT was modeled by a conductive cube. A coefficient is proposed that is intended to evaluate the difference between an average of the E-fields on the six surfaces of the EUT in a case where the EUT is loaded and unloaded. As a result, the maximum deviation from the coefficient in the anechoic chamber for that in the GTEM cell became larger as the EUT size was increased, and the deviation was less then 5.0 dB when the ratio of an EUT size to a distance between the septum (inner conductor of a GTEM cell) and the floor conductor was below 0.4

Keywords

anechoic chambers (electromagnetic); electric fields; electromagnetic compatibility; electromagnetic interference; finite difference time-domain analysis; test facilities; E-field distribution estimation; FDTD method; anechoic chamber; conductive cube; equipment under test; finite-difference time-domain method; gigahertz transverse electromagnetic cell; loaded EUT; loaded GTEM cell; radiated emissions; septum to floor conductor distance; unloaded EUT; Anechoic chambers; Conductors; Electromagnetic compatibility; Electromagnetic scattering; Electromagnetic waveguides; Finite difference methods; Frequency; Immunity testing; TEM cells; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2001. EMC. 2001 IEEE International Symposium on

Conference_Location

Montreal, Que.

Print_ISBN

0-7803-6569-0

Type

conf

DOI

10.1109/ISEMC.2001.950564

Filename

950564