In this article, a wideband, polarization-insensitive, and wide-incident-angle stable absorber based on conductive ink frequency selective surface is presented. The presented absorber is compatible with screen printing technology. The design and absorption principle of the proposed absorber is presented, and simulation analysis is conducted. The simulation results show that in the frequency range 6.58–16.38 GHz, the absorptivity of the proposed absorber is greater than 90%, while the relative absorption bandwidth is 85.4%. The whole absorber structure is relatively thin, having a total thickness of 3.3 mm, corresponding to 0.126λ0 at its center frequency. In addition, for both transverse electric and transverse magnetic incident waves, the proposed absorber achieves the absorptivity of more than 80% at the incident angle of up to 45°. A prototype of the proposed absorber is fabricated and used in experimental verification. The obtained experimental results show a good agreement with the numerical simulations. This absorber has great potential applications in the field of microwave sensing and absorbing.

中文翻译：

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基于导电油墨选频表面的具有偏振不敏感和宽入射角稳定性的宽带吸收器

本文提出了一种基于导电油墨选频表面的宽带、偏振不敏感、宽入射角稳定吸收体。所呈现的吸收器与丝网印刷技术兼容。介绍了所提出的吸收器的设计和吸收原理，并进行了仿真分析。仿真结果表明，在 6.58-16.38 GHz 频率范围内，所提出的吸收体的吸收率大于 90%，而相对吸收带宽为 85.4%。整个吸波结构比较薄，总厚度为3.3mm，对应中心频率为0.126λ0。此外，对于横向电和横向磁入射波，所提出的吸收器在高达 45° 的入射角下实现了 80% 以上的吸收率。所提出的吸收器的原型被制造并用于实验验证。所得实验结果与数值模拟结果吻合良好。该吸收体在微波传感和吸收领域具有巨大的应用潜力。