Design and analysis of a compact ultrathin ultra‐wideband metamaterial absorber with near to unity absorption for Ku‐band

作者：Vishal Puri, H. Singh · 发表于：International journal of RF and microwave computer-aided engineering · 年份：2022 · DOI：10.1002/mmce.23069 · 被引用次数：10

The proposed work intend to develop a compact ultrathin ultra‐wideband (UWB) metamaterial absorber with a feature of near to unity absorption. The proposed absorber is identified by one consolidated patch in combination with L‐shaped patches. The proposed absorber provides more than 97% absorption from 13.6 to 18.5 GHz, the operating band of the absorber is ultra‐wide with a bandwidth of 4.9 GHz. The proposed structure exhibits full width half maximum (FWHM) of approximately 6.6 GHz from 12.5 to 19.1 GHz. The design of the structure is having a thickness of 0.072 λ0 relative to the lowest frequency (at 13.58 GHz) of the UWB. The structure with compact size (9 mm × 9 mm × 1.6 mm) compensates for the marginal rise in dimension with ultra‐wideband absorption having an absorptivity of above 97% in comparison to existing UWB absorber available in commercially exploitable microwave frequency. The evolution process incorporates incremental changes in the design of the absorber thereby witnessing experimentally verified more than 97% absorptivity. The in‐depth analysis of the proposed structure is done with incident and polarisation angle analysis. The current and field distribution validates the effectiveness of the UWB metamaterial based microwave absorber.