Ultrawideband Electromagnetic Interference Shielding Using a Frequency Selective Surface

Document Type

Conference Proceeding

Publication Date

1-1-2026

Abstract

This paper presents an ultrathin and ultrawideband frequency-selective surface (FSS) for electromagnetic interference (EMI) shielding applications. The proposed FSS consists of a compact unit cell formed by a metallic patch etched with a crossshaped slot and symmetrically embedded rectangular slots, implemented on a thin Rogers AD250C dielectric substrate. The combined slot configuration introduces multiple resonant modes that effectively broaden the stopband response while maintaining a low-profile structure. The overall unit-cell dimensions are 5 × 5 × 0.508 mm(0.5 × 0.5 × 0.05 ?0) at the center frequency of 30.73 GHz. The proposed FSS achieves an ultrawide EMI shielding bandwidth from 6.92 to 54.54 GHz, corresponding to a fractional bandwidth of 155.2%, with stable performance maintained for incident angles up to 80°. Owing to its compact size, ultrathin profile, and robust angular stability, the proposed FSS is wellsuited for high-frequency EMI shielding in 5G, radar, aerospace, and secure communication systems.

Publication Title

IEEE Antennas and Propagation Society AP S International Symposium Digest

ISBN

[9798331584122]

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