Hybrid Absorber with Dual-Band Performance and High Absorption Rate

Stanislav Stefanov Zhekov, Peng Mei, Gert Frølund Pedersen, Wei Fan

Research output: Contribution to journalJournal articleResearchpeer-review


Low-profile absorbers are of interest for compact
shielded enclosures for making antenna measurements. Furthermore, the cost should be minimized for practical systems since
massive production is required. In this work, a novel dualband hybrid absorber based on structured resonators and lossy
dielectric material is proposed to meet these requirements. The
lossy material enables improvement in the absorption rate and
operating bandwidth. The proposed absorber operates at 2.4 and
5.0 GHz Wi-Fi spectra and covers the low frequency bands with
a reflection coefficient lower than -25 dB and a large part of the
high frequency ones with reflection lower than -20 dB. Moreover,
some of the Wi-Fi bands are covered with a reflection coefficient
better than -30 dB. In order to validate the proposed concept,
the dual-band absorber is manufactured and tested, and the
agreement between the simulation and measurement results is
good. The presented structure is cost-effective since it only uses
conventional PCB technology for manufacturing and commercial
lossy dielectric material.
Original languageEnglish
JournalI E E E Transactions on Electromagnetic Compatibility
Issue number1
Pages (from-to)1-9
Number of pages9
Publication statusE-pub ahead of print - 2023


  • Dual-band
  • electromagnetic (EM) absorber
  • high absorption
  • lossy dielectric material
  • structured resonator


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