Nano-Micro Letters (Mar 2023)

Absorption-Dominant mmWave EMI Shielding Films with Ultralow Reflection using Ferromagnetic Resonance Frequency Tunable M-Type Ferrites

  • Horim Lee,
  • Seung Han Ryu,
  • Suk Jin Kwon,
  • Jae Ryung Choi,
  • Sang-bok Lee,
  • Byeongjin Park

DOI
https://doi.org/10.1007/s40820-023-01058-w
Journal volume & issue
Vol. 15, no. 1
pp. 1 – 23

Abstract

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Highlights A novel multi-band absorption-dominant electromagnetic interference (EMI) shielding film with transition metal-doped M-type strontium ferrites composite layer and a conductive grid is developed. This film shows (1) ultralow EMI reflection less than 5%, (2) in multiple mmWave frequency bands corresponding to ferrites and grid characteristics, (3) with a broadband EMI shielding performance over 99.9% from 40 to 90 GHz.

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