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

doi:10.1088/1674-1056/23/2/024201

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.

Keywords: electromagnetic absorber frequency selective surfaces (FSS) varactor

Received: 06 April 2013
Revised: 27 May 2013
Accepted manuscript online:

PACS:	42.25.Bs	(Wave propagation, transmission and absorption)
	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)

Fund: Project supported by the National Natural Science Foundations of China (Grant Nos. 61271250 and 61202490).

Corresponding Authors: Lin Bao-Qin
E-mail: aflbq@sina.com

About author: 42.25.Bs; 52.35.Hr; 75.70.-i

Cite this article:

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) Design of a tunable frequency selective surface absorber as a loaded receiving antenna array 2014 Chin. Phys. B 23 024201

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

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