A Highly Selective Rasorber Based on Second-Order Resonance

作者：Xiu, Xin; Che, Wenquan^*; Yang, Wanchen; Han, Ye; Xue, Quan

来源：IEEE Antennas and Wireless Propagation Letters, 2020, 19(2): 223-227.

DOI：10.1109/LAWP.2019.2954535

• Aperture-coupled resonator (ACR)
• high selectivity
• rasorber
• second-order band-pass response

A novel frequency-selective rasorber with one highly selective passband between two absorption bands is presented. Based on the equivalent circuit analysis, the approach of using a second-order band-pass response in the lossless layer is adopted to improve the selectivity of the passband. A two-layered structure consisting of one lossy and one lossless layer is then used for implementation. The lossy layer is constructed using stub resonators, while an aperture-coupled resonator is used to realize lossless layer and achieve the highly selective passband. Under normal incidence, the operating bandwidth of the proposed rasorber is 110.6%. One passband with sharp roll-off edge and small insertion loss (0.08 dB) is achieved at 4.3 GHz. For demonstration, one prototype was fabricated and measured, and a good agreement is observed accordingly.

• 单位
  南京邮电大学; 南京理工大学