中国物理B ›› 2021, Vol. 30 ›› Issue (10): 104102-104102.doi: 10.1088/1674-1056/abf110

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Wideband radar cross section reduction based on absorptive coding metasurface with compound stealth mechanism

Xinmi Yang(杨歆汨)1,2,†, Changrong Liu(刘昌荣)1, Bo Hou(侯波)3, and Xiaoyang Zhou(周小阳)2   

  1. 1 School of Electronics and Information Engineering, Soochow University, Suzhou 215006, China;
    2 State Key Laboratory of Millimeter Waves, Nanjing 210096, China;
    3 School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
  • 收稿日期:2021-01-07 修回日期:2021-03-18 接受日期:2021-03-23 出版日期:2021-09-17 发布日期:2021-09-17
  • 通讯作者: Xinmi Yang E-mail:yangxinmi@suda.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61871280, 61372012, and 61671315).

Wideband radar cross section reduction based on absorptive coding metasurface with compound stealth mechanism

Xinmi Yang(杨歆汨)1,2,†, Changrong Liu(刘昌荣)1, Bo Hou(侯波)3, and Xiaoyang Zhou(周小阳)2   

  1. 1 School of Electronics and Information Engineering, Soochow University, Suzhou 215006, China;
    2 State Key Laboratory of Millimeter Waves, Nanjing 210096, China;
    3 School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
  • Received:2021-01-07 Revised:2021-03-18 Accepted:2021-03-23 Online:2021-09-17 Published:2021-09-17
  • Contact: Xinmi Yang E-mail:yangxinmi@suda.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61871280, 61372012, and 61671315).

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摘要： A scheme of combing wave absorption and phase cancellation mechanisms for widening radar cross section (RCS) reduction band is proposed. An absorptive coding metasurface implementing this scheme is derived from traditional circuit analog absorber (CAA) composed of resistive ring elements which characterize dual resonances behavior. It is constructed by replacing some of the CAA elements by another kind of resistive ring elements which is singly resonant in between the original two resonant bands and has reflection phase opposite to that of the original elements at resonance. Hence the developed metasurface achieves an improved low-RCS band over which the lower and higher sub-bands are mainly contributed by wave absorption mainly while the middle sub-band is formed by joint effect of wave absorption and anti-phase cancellation mechanisms. The polarization-independent wideband RCS reduction property of the metasurface is validated by full-wave simulation results of a preliminary and an advanced design examples which employ the same element configuration but different element layout schemes as partitioned distribution and random coding. The advanced design also exhibits broadband bistatic low-RCS property and keeps a stable specular RCS reduction performance with regard to incident elevation angle up to 35°. The advanced design is fabricated and the experimental results of the sample agrees qualitatively well with their simulated counterparts. The measured figure of merit (i.e., low-RCS bandwidth ratio versus electrical thickness) of the sample is 40.572, which is superior to or comparable with those for most of other existing metasurface with compound RCS reduction mechanism. The proposed compound metasurface technique also features simple structure, light weight, low cost and easy fabrication compared with other techniques. This makes it promising in applications such as radar stealth and electromagnetic compatibility.

关键词: radar cross section (RCS) reduction, coding metasurface, wave absorption, anti-phase cancellation

Abstract: A scheme of combing wave absorption and phase cancellation mechanisms for widening radar cross section (RCS) reduction band is proposed. An absorptive coding metasurface implementing this scheme is derived from traditional circuit analog absorber (CAA) composed of resistive ring elements which characterize dual resonances behavior. It is constructed by replacing some of the CAA elements by another kind of resistive ring elements which is singly resonant in between the original two resonant bands and has reflection phase opposite to that of the original elements at resonance. Hence the developed metasurface achieves an improved low-RCS band over which the lower and higher sub-bands are mainly contributed by wave absorption mainly while the middle sub-band is formed by joint effect of wave absorption and anti-phase cancellation mechanisms. The polarization-independent wideband RCS reduction property of the metasurface is validated by full-wave simulation results of a preliminary and an advanced design examples which employ the same element configuration but different element layout schemes as partitioned distribution and random coding. The advanced design also exhibits broadband bistatic low-RCS property and keeps a stable specular RCS reduction performance with regard to incident elevation angle up to 35°. The advanced design is fabricated and the experimental results of the sample agrees qualitatively well with their simulated counterparts. The measured figure of merit (i.e., low-RCS bandwidth ratio versus electrical thickness) of the sample is 40.572, which is superior to or comparable with those for most of other existing metasurface with compound RCS reduction mechanism. The proposed compound metasurface technique also features simple structure, light weight, low cost and easy fabrication compared with other techniques. This makes it promising in applications such as radar stealth and electromagnetic compatibility.

Key words: radar cross section (RCS) reduction, coding metasurface, wave absorption, anti-phase cancellation

中图分类号:  (Applied classical electromagnetism)

  • 41.20.-q
41.20.Jb (Electromagnetic wave propagation; radiowave propagation) 84.40.-x (Radiowave and microwave (including millimeter wave) technology)