An Extended Analytical Formulation for Fast Prediction of Shielding Effectiveness of an Enclosure at Different Observation Points With an off-Axis Aperture

Author

Enbo Liu ; Ping-An Du ; Baolin Nie

Author_Institution

Dept. of Mechatron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

56

Issue

3

fYear

2014

fDate

41791

Firstpage

589

Lastpage

598

Abstract

In this paper, Robinson´s analytical formulation is extended to calculate the shielding effectiveness of an shielding enclosure at off-axis observation points with an off-axis aperture. First, we give the procedure of extending the original analytical formulation. Then, the transmission-line matrix method (TLM) is utilized to validate the extended analytical formulation. The application range of the extended method is decided by comparing to TLM, and the good agreement between the results calculated by two methods indicates that the extended analytical formulation is efficient in predicting the shielding effectiveness of an enclosure at different observation points with an off-axis aperture. Through the intensive calculation and analysis, the distribution of SE inside the enclosure and the variation of SE with aperture position can be obtained, which may be used as a guideline for designing shielding enclosures.

Keywords

electromagnetic shielding; matrix algebra; Robinson analytical formulation; TLM; different observation points; extended analytical formulation; fast prediction; intensive calculation; off-axis aperture; shielding effectiveness; transmission line matrix method; Apertures; Cavity resonators; Couplings; Impedance; Polarization; Time-domain analysis; Time-varying systems; Analytical formulation; aperture location; observation point; shielding effectiveness; transmission-line matrix method (TLM);

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/TEMC.2013.2289742

Filename

6670799