Theoretical and experimental modeling of longitudinal characteristics of TEM cells

Author

Cai, Xiao-Ding ; Costache, George I.

Author_Institution

Dept. of Electr. Eng., Ottawa Univ., Ont., Canada

fYear

1991

fDate

July 12 1991-Aug. 16 1991

Firstpage

14

Lastpage

16

Abstract

Longitudinal characteristics of transverse electromagnetic (TEM) cells include longitudinal variations of electric field and impedance. These characteristics have only been observed in an in-depth experimental investigation reported by Crawford et al. (1974,1977). A theoretical approach to model these characteristics is presented. Their relations with voltage standing wave ratio (VSWR), loss, terminal load impedance, characteristic impedance, and cell dimensions are reflected in expressions derived. Numerical results agree well with reported experimental data at some frequencies at which full information about the longitudinal variations was obtained with electric field probes. Concepts concerning longitudinal nonuniformity of both field and impedance are proposed and are useful in the evaluation of the longitudinal characteristics of TEM cells in use.<>

Keywords

electric fields; electric impedance; electromagnetic compatibility; test equipment; test facilities; EMC testing; TEM cells; cell dimensions; characteristic impedance; electric field probes; electric field variations; impedance variations; longitudinal characteristics; terminal load impedance; transverse electromagnetic cell; voltage standing wave ratio; Cutoff frequency; Electromagnetic compatibility; Electromagnetic interference; Impedance; Power transmission lines; Probes; Propagation losses; TEM cells; Transmission line theory; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 1991. Symposium Record., IEEE 1991 International Symposium on

Conference_Location

Cherry Hill, NJ, USA

Print_ISBN

0-7803-0158-7

Type

conf

DOI

10.1109/ISEMC.1991.148172

Filename

148172