中国物理B ›› 2014, Vol. 23 ›› Issue (2): 24201-024201.doi: 10.1088/1674-1056/23/2/024201

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Design of a tunable frequency selective surface absorber as a loaded receiving antenna array

林宝勤, 赵尚弘, 魏伟, 达新宇, 郑秋容, 张衡阳, 朱蒙   

  1. Institute of Information and Navigation, Air Force Engineering University, Xi’an 710077, China
  • 收稿日期:2013-04-06 修回日期:2013-05-27 出版日期:2013-12-12 发布日期:2013-12-12
  • 基金资助:
    Project supported by the National Natural Science Foundations of China (Grant Nos. 61271250 and 61202490).

Design of a tunable frequency selective surface absorber as a loaded receiving antenna array

Lin Bao-Qin (林宝勤), Zhao Shang-Hong (赵尚弘), Wei Wei (魏伟), Da Xin-Yu (达新宇), Zheng Qiu-Rong (郑秋容), Zhang Heng-Yang (张衡阳), Zhu Meng (朱蒙)   

  1. Institute of Information and Navigation, Air Force Engineering University, Xi’an 710077, China
  • Received:2013-04-06 Revised:2013-05-27 Online:2013-12-12 Published:2013-12-12
  • Contact: Lin Bao-Qin E-mail:aflbq@sina.com
  • About author:42.25.Bs; 52.35.Hr; 75.70.-i
  • Supported by:
    Project supported by the National Natural Science Foundations of China (Grant Nos. 61271250 and 61202490).

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摘要： An effective approach to designing a tunable electromagnetic absorber is presented and experimentally verified; it is based on an idea that an existing frequency selective surface (FSS) absorber is regarded as a loaded receiving antenna array. The existing absorber is effectively simplified by withdrawing half of the loaded resistors; a more compact one is obtained when lumped capacitors are introduced. Building on this, a varactor-tunable absorber with a proper bias network is proposed. Numerical simulations of one tunable absorber with 1.6 mm in thickness show that a wide tuning range from 3.05 GHz to 1.96 GHz is achieved by changing the capacitance of the loaded varactor from 0.5 pF to 5.0 pF. An experiment is carried out using a rectangular waveguide measurement setup and excellent agreement between the simulated and measured results is demonstrated.

关键词: electromagnetic absorber, frequency selective surfaces (FSS), varactor

Abstract: An effective approach to designing a tunable electromagnetic absorber is presented and experimentally verified; it is based on an idea that an existing frequency selective surface (FSS) absorber is regarded as a loaded receiving antenna array. The existing absorber is effectively simplified by withdrawing half of the loaded resistors; a more compact one is obtained when lumped capacitors are introduced. Building on this, a varactor-tunable absorber with a proper bias network is proposed. Numerical simulations of one tunable absorber with 1.6 mm in thickness show that a wide tuning range from 3.05 GHz to 1.96 GHz is achieved by changing the capacitance of the loaded varactor from 0.5 pF to 5.0 pF. An experiment is carried out using a rectangular waveguide measurement setup and excellent agreement between the simulated and measured results is demonstrated.

Key words: electromagnetic absorber, frequency selective surfaces (FSS), varactor

中图分类号:  (Wave propagation, transmission and absorption)

  • 42.25.Bs
52.35.Hr (Electromagnetic waves (e.g., electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid)) 75.70.-i (Magnetic properties of thin films, surfaces, and interfaces)