Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 49, Issue 42, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/49/42/425102
Keywords
magnetic-type matematerial absorber; thin; broadband; low frequency of microwave
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Funding
- Natural Science Foundation of Hubei Province, China [2012FFB02210]
- National Natural Science Foundation of China [61172003]
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The design, fabrication, and measurement of a metamaterial with broadband microwave absorption properties in the low frequency range are presented in this paper. The metamaterial has a layered structure with a thickness of 2.2 mm, and consists of a conventional printed circuit board (PCB) process fabricated cross array on the surface of a flake-shaped carbonyl iron (CI) powder-filled silicon rubber composite magnetic substrate backed by a metal plane. The measurement results indicate that the absorption bandwidth (defined as the frequency range with reflection coefficient below-10 dB) of the proposed structure is 2.55 GHz-5.68 GHz. The power loss mechanism was outlined according to the current distribution on and off the resonance frequency. Moreover, the absorption performance of the proposed structure for incident angles ranging from 0 degrees to 60 degrees for both transverse electric (TE) wave and transverse magnetic (TM) waves were exhibited.
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