A novel broadband double-ring holed element metasurface absorber to suppress EMI from PCB heatsinks

URUL B., Doǧan H., BAŞYİĞİT İ. B., GENÇ A.

Turkish Journal of Electrical Engineering and Computer Sciences, cilt.30, sa.6, ss.2254-2267, 2022 (SCI-Expanded, Scopus, TRDizin)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 30 Sayı: 6
  • Basım Tarihi: 2022
  • Doi Numarası: 10.55730/1300-0632.3937
  • Dergi Adı: Turkish Journal of Electrical Engineering and Computer Sciences
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Applied Science & Technology Source, Compendex, Computer & Applied Sciences, INSPEC, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.2254-2267
  • Anahtar Kelimeler: Absorption rate, EMI, metasurface, PCB heatsinks
  • Isparta Uygulamalı Bilimler Üniversitesi Adresli: Evet

Özet

In this study, a new Broadband Double Ring Hole Element (BDHE) meta-surface absorber is studied to suppress EMI from PCB heatsink for 1-12 GHz covering L, S, C, and X bands. The proposed metamaterial-structure consists of resistances and 8 ring resonators, four of which are inner and four are outer that are configured to provide an absorbing effect. For broadband, numerical simulations show that an average of 65% absorption value is obtained between 4-12 GHz. It is determined that this value reached 69.84% by increasing the used resistance values (R = 150Ω). This value may be significant to reduce the EMI values to which PCB circuit elements are exposed. Also, when the incidence angle effect is examined, the absorption values of 90% at 10.1 GHz and 98% at 11 GHz for θ =15° can also be recommended for narrowband applications. On the other hand, for R = 50 Ω, this value is 82% and 89%, respectively, in the 3-4 GHz and 9.9-11.5 GHz ranges. It can also be stated that the average E-field from the heatsink can be decreased with the location of the proposed metamaterial relative to the base and increased metamaterial dimensions. Finally, in the near-field region, the distance between metamaterial and the heatsink has no appreciable effect on the E-field.