NDLI: Design of a tuneable and broadband absorber using a switchable transmissive/reflective FSS

Content Provider	IET Digital Library
Author	Zeng, Xianliang Gao, Meng Zhang, Linxi Wan, Guobin Hu, Bin
Abstract	A new architecture for designing a tuneable wideband absorber using an active frequency selective surface (AFSS) is presented. The proposed AFSS is composed of 2-D periodic array of two opposite directional anchor-shaped metal strips printed on a dielectric substrate with no metallic screen on the back side, where positive–intrinsic–negative diodes as active components are embedded between each two anchor-shaped strips. Biasing at different voltages to turn ON and OFF the diodes, AFSS structure can react as a switchable surface between transmissive and reflective states. While, the absorber consists of the designed AFSS structure and a metallic back-plane, separated by a foam spacer. By dynamically changing the bias voltage of the diodes, the impedance of the proposed absorber can be adjusted and match with the free space at its resonant frequencies. Doing this, the presented absorber is able to offer a tuneable reflectivity level of less than −10 dB over a wide frequency band from 7 to 13.1 GHz. The detailed design of a switchable transmissive/reflective surface and a tuneable wideband absorber are reported. Both the simulated and measured results have verified the proposed performances. Furthermore, a good agreement between the measurement and simulation results has been obtained.
Starting Page	1211
Ending Page	1215
Page Count	5
ISSN	17518725
Volume Number	12
e-ISSN	17518733
Issue Number	Issue 7, Jun (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/12/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2017.0691
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2018-01-22
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Absorber Impedance Active Component Active Frequency Selective Surface AFSS Structure Anchor-shaped Strips Broadband Absorber Dielectric Substrate Electromagnetic Wave Absorption Foam Spacer Frequency 7 GHz to 13.1 GHz Frequency Selective Surface Metallic Back Plane Microwave Material Opposite Directional Anchor-shaped Metal Strips Positive-intrinsic-negative Diode Reflective State Switchable Transmissive-reflective Surface Transmissive State Transmissive-reflective FSS Tuneable Reflectivity Level Tuneable Wideband Absorber Two-dimensional Periodic Array
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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