A novel method to eliminate the resonance of a rectangular enclosure with aperture

Article type: Research Article

Authors: Ghandehari, Mehdi Bahdorzadeh^a | Khazaei, AliAkbar^a | Vaezi, Sedigheh^{b; *}

Affiliations: [a] Department of Electrical Engineering, College of Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran | [b] Department of Engineering, Khavaran University Mashhad, Mashhad, Iran

Correspondence: [*] Corresponding author: Sedigheh Vaezi, Department of Engineering, Khavaran University Mashhad, Iran. E-mail:S.Vaezi@msc.khi.ac.ir

Abstract: An efficient and practical method to suppress the resonant frequency of a rectangular enclosure with aperture has been proposed. In this paper a lossy dielectric has been used as a matched load termination which acts as a wave absorber at the end of the shielding box. Transmission line method was used for modeling the rectangular enclosure with aperture under electromagnetic interference wave and the results were verified by transmission line matrix method and CST software. Also a complete range of measurements were performed to find the susceptibility of the shielding box against electromagnetic interferences. The proposed method resulted in a very good improvement of the shielding effectiveness of the enclosure at the resonant frequency and the results were verified by measurement.

Keywords: Rectangular shielding enclosure, shielding effectiveness (SE), absorber, lossy dielectric termination, electromagnetic interference

DOI: 10.3233/JAE-140181

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 50, no. 2, pp. 215-224, 2016