Applied Sciences, Vol. 15, Pages 4534: Design of a Miniaturized and Polarization-Independent Frequency-Selective Surface for Targeted EMI Shielding

Applied Sciences doi: 10.3390/app15084534

Authors:
Muhammad Idrees
Yejun He
Youquan Wen
Abdul Majeed

In this article, a miniaturized frequency-selective surface (FSS)-based electromagnetic shield is investigated for EMI mitigation in the X-band. The FSS comprises a convoluted conducting loop designed over an FR-4 substrate. It operates at 10 GHz X-band frequency and offers an effective shielding of at least 33 dB. It reveals rejection bandwidths of 26% for the TE and TM wave modes at normal incidence. Moreover, it accomplishes polarization-insensitive and angularly stable spectral responses owing to its structural symmetry and compact size. In addition, an equivalent circuit model (ECM) and a finite prototype of the shield are developed to verify EM simulations. A comparison of the results indicates that the FSS offers wide angular stability and excellent shielding performance, which makes it a suitable candidate for applications requiring targeted EMI mitigation.

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Muhammad Idrees www.mdpi.com