Varactor-tunable second-order bandpass frequency-selective surface with embedded bias network

Ebrahimi, A, Shen, Z, Withayachumnankul, W, Al-Sarawi, S and Abbott, D 2016, 'Varactor-tunable second-order bandpass frequency-selective surface with embedded bias network', IEEE Transactions on Antennas and Propagation, vol. 64, no. 5, pp. 1672-1680.


Document type: Journal Article
Collection: Journal Articles

Title Varactor-tunable second-order bandpass frequency-selective surface with embedded bias network
Author(s) Ebrahimi, A
Shen, Z
Withayachumnankul, W
Al-Sarawi, S
Abbott, D
Year 2016
Journal name IEEE Transactions on Antennas and Propagation
Volume number 64
Issue number 5
Start page 1672
End page 1680
Total pages 9
Publisher IEEE
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.
Subject Electrical and Electronic Engineering not elsewhere classified
Circuits and Systems
Keyword(s) Electronic tuning
frequency selective surfaces (FSSs)
periodic structure
reconfigurable
varactor
DOI - identifier 10.1109/TAP.2016.2537378
Copyright notice © 2016 IEEE
ISSN 0018-926X
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