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首页> 外文期刊>Journal of Electromagnetic Waves and Applications >Three-dimensional microwave broadband metamaterial absorber with broad transmission window based on the coupled symmetric split ring resonators
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Three-dimensional microwave broadband metamaterial absorber with broad transmission window based on the coupled symmetric split ring resonators

机译：基于耦合对称开环谐振器的宽透射窗三维微波宽带超材料吸收器

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摘要

A novel three-dimensional (3-D) microwave metamaterial absorber (MA) is presented, which exhibits the characteristics of broadband absorption with broad low insertion-loss transmission window. The proposed absorber is constructed by fabricating a 3-D backplane-less periodic interlocking lattice array consisting of resistors-loading symmetrical split ring resonators. By optimizing the geometry parameters and the resistance values, a broad absorption band with the relative bandwidth of 40.8% is achieved at lower frequencies, together with a low insertion-loss (<1 dB) transmission window with a relative bandwidth of 60% at upper frequencies. The design is polarization insensitive and the absorption peaks remain high level with large angles of oblique incidence for both transverse electric (TE) and transverse magnetic (TM) polarizations. The effective constitutive parameters are derived and the physical mechanisms are also investigated. The measurements on the metamaterial absorber (MA) prototype show good agreement with the simulated results, which further prove the validity of the design. It is expected that the proposed MA may improve the flexibilities for the designs of MA with transmission window and be favorable for some potential applications such as electromagnetic interference and stealth radome technologies.
机译：提出了一种新型的三维（3-D）微波超材料吸收器（MA），该吸收器具有宽带吸收的特点，具有宽的低插入损耗传输窗口。所提出的吸收器是通过制造3D无背板周期性互锁点阵阵列构成的，该阵列由电阻加载对称的裂环谐振器组成。通过优化几何参数和电阻值，可以在较低频率下获得相对带宽为40.8％的宽吸收带，以及较低的插入损耗（<1 dB）传输窗口，相对带宽为60％频率。该设计对极化不敏感，并且对于横向电（TE）和横向磁（TM）极化，吸收峰都保持高水平，并且具有大的倾斜入射角。推导了有效的本构参数，并研究了其物理机理。超材料吸收器（MA）原型的测量结果与模拟结果吻合良好，进一步证明了设计的有效性。期望所提出的MA可以改善具有透射窗的MA的设计的灵活性，并有利于诸如电磁干扰和隐身天线罩技术的一些潜在应用。

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