Modified Shielding Effectiveness Equation for Novel Multilayered Waveguide-Below-Cutoff Array

Sangin Kim, Yuna Kim, Seung Ki Pang, Jong Gwan Yook

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This paper presents an airflow analysis and a shielding effectiveness (SE) analysis for a multilayered waveguide-below-cutoff array (WBCA) used to prevent electromagnetic penetration. The performance of the conventional unit square WBCA and the multilayered WBCA is compared. For the airflow analysis, the simulations are performed at the entrance and exit of the shielding structure when an airflow velocity of 1 m/s is injected at the inlet. The velocity loss and pressure difference of the multilayered WBCA are improved compared with the unit square WBCA. In terms of the shielding, the SE of the multilayered WBCA is compensated by increasing the number of overlapping layers. Furthermore, a new SE equation is derived by modifying that of the unit square WBCA.

Original languageEnglish
Article number8410429
Pages (from-to)3912-3920
Number of pages9
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number9
Publication statusPublished - 2018 Sept

Bibliographical note

Funding Information:
Manuscript received January 14, 2018; revised March 30, 2018 and May 10, 2018; accepted May 27, 2018. Date of publication July 12, 2018; date of current version September 4, 2018. This work was supported by a grant from the Infrastructure and Transportation Technology Promotion Research Program through the Ministry of Land, Infrastructure and Transport of the Korean Government. This paper is an expanded version from the Asia–Pacific Microwave Conference, Kuala Lumpur, November 13–16, 2017. (Corresponding author: Jong-Gwan Yook.) S. Kim, Y. Kim, and J.-G. Yook are with the Department of Electrical and Electronic Engineering, Yonsei University, Seoul 30722, South Korea (e-mail:;

Publisher Copyright:
© 1963-2012 IEEE.

All Science Journal Classification (ASJC) codes

  • Radiation
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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