Broadband microwave metamaterial absorber with lumped resistor loading
School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, PR China
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Accepted: 14 December 2018
Published online: 16 January 2019
Narrow absorption bandwidth has been a fundamental drawback hindering many metamaterial absorbers for practical applications. In this paper, by loading lumped resistors, we have successfully designed a microwave metamaterial absorber with multioctave wide absorption bandwidth covering the entire X- and Ku-bands, while keeping the thickness of the absorber less than 1/10 of the working wavelength. The polarization-insensitive absorber shows a good angular stability for both transverse electric (TE) and transverse magnetic (TM) incidences. Prototype has been fabricated and measured to validate the design principle and the simulated results, and good agreements are observed between simulated and measured results. The proposed metamaterial absorber offers an efficient way to realize broadband microwave absorption with stable angular performance, which may find potential uses in many applications, for example, electromagnetic compatibility.
Key words: Metamaterial absorber / broadband / microwave / lumped resistor
© K. Chen et al., published by EDP Sciences, 2019
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