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Type: Journal article
Title: Varactor-tunable second-order bandpass frequency-selective surface with embedded bias network
Author: Ebrahimi, A.
Zhongxiang, Z.
Withayachumnankul, W.
Al-Sarawi, S.
Abbott, D.
Citation: IEEE Transactions on Antennas and Propagation, 2016; 64(5):1672-1680
Publisher: Institute of Electrical and Electronics Engineers
Issue Date: 2016
ISSN: 0018-926X
Statement of
Amir Ebrahimi, Zhongxiang Shen, Withawat Withayachumnankul, Said F. Al-Sarawi and Derek Abbott
Abstract: A varactor-tunable second-order bandpass frequency-selective surface (FSS) for microwave frequencies is presented in this article. The FSS is composed of three stacked metallic layers. The wire grid in each layer in combination with metallic vias provides the bias for the varactors. This configuration eliminates the need for a dedicated bias network for the varactors, and thus avoids undesirable responses associated with the added bias grid. An equivalent circuit model together with an analytical design method is provided to simplify the design procedure of the FSS. The performance of the proposed structure is experimentally validated in a parallel-plate waveguide setup. Measurements show that by changing the varactor capacitance from 0.12 to 0.38 pF, the center frequency of the filter is tuned from 5.2 to 3.7 GHz with a consistent fractional bandwidth of 9% and with an insertion loss between 3 and 6 dB.
Keywords: Electronic tuning; frequency-selective surfaces (FSSs); periodic structure; reconfigurable; varactor
Rights: © 2016 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See for more information.
RMID: 0030049024
DOI: 10.1109/TAP.2016.2537378
Appears in Collections:Electrical and Electronic Engineering publications

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