| 摘要: |
| 针对当前通带可调谐频率选择吸波器(Frequency Selective Rasorber,FSR)插入损耗过高的问题，提出了一种可调谐的双极化吸收-透射-吸收(Absorption-Transmission-Absorption,A-T-A)的FSR。集总电阻被加载到损耗层以吸收吸波带内的电磁(Electromagnetic,EM)波。变容二极管被加载到另一个无损传输层，以控制该FSR的传输频带，给出了其等效电路模型。提出的可调谐FSR通过改变施加在无损传输层的偏置电压，可以使透波带在14.5~15.5 GHz范围内移动，插入损耗保持在-1.67 dB以上。有损层的串联谐振结构在10.2~13.5 GHz和17.2~22 GHz产生双边吸收频带，其宽带反射抑制范围为10.3~22 GHz(70.7%)。其原型经过了加工测试，实测结果验证了仿真结果的有效性。 |
| 关键词: 可调谐频率选择吸波器 双极化 RCS缩减 隐形天线罩 |
| DOI：10.20079/j.issn.1001-893x.240716002 |
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| 基金项目:军科委基础加强计划项目（2022-JCJQ-JJ-0230） |
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| A Dual-polarized Frequency Selective Rasorber with a Tunable Transparent Band |
| 〖JP〗SHI Tongtong,ZHANG Xiaofa,WU Weiwei,WANG Shaozhi,XU Yixuan,YAN Yuchen,YAN Xiao |
| (State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,National University of Defense Technology,Changsha 410073,China) |
| Abstract: |
| A tunable dual polarization absorption-transmission-absorption (A-T-A) frequency selective absorbers(FSR) to address the issue of high insertion loss in current tunable FSRs is proposed.The lumped resistors are loaded onto the lossy layer to absorb electromagnetic waves within the absorption band.The varactor diodes are loaded onto another lossless layer to control the transmission frequency band of the FSR.Its equivalent circuit model is provided.The proposed tunable FSR can change the passband within the range of 14.5~15.5 GHz by changing the bias voltage applied to the lossless transmission layer,while maintaining insertion loss above -1.67 dB.The series resonant structure of the lossy layer generates bilateral absorption bands between 10.2~13.5 GHz and 17.2~22 GHz,with broadband reflection suppression ranging from 10.3 GHz to 22 GHz (70.7%).The prototype is manufactured,and the measured results have verified the simulation results. |
| Key words: tunable frequency selective rasorber dual-polarization RCS reduction stealthy radomes |
