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A varactor-tunable high impedance surface with a resistive-lumped-element biasing grid
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Mias, Christos and Yap, Jyh Haur (2007) A varactor-tunable high impedance surface with a resistive-lumped-element biasing grid. IEEE Transactions on Antennas and Propagation, Vol.55 (No.7). pp. 1955-1962. doi:10.1109/TAP.2007.900228 ISSN 0018-926X.
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Official URL: http://dx.doi.org/10.1109/TAP.2007.900228
Abstract
A high impedance surface consisting of metallic square patches electrically connected through vias to the ground plane beneath them is made tunable. Tunability is achieved by connecting adjacent patches with varactor diodes thus altering the capacitance between the patches and hence the surface's resonance frequency. The varactor diodes are biased with the aid of a resistive grid. The grid is made resistive using surface mount resistors. Using an approximate equivalent circuit the effect of the varactor diode resistance is investigated for normal plane wave incidence. It is shown that at resonance, a small varactor resistance may lead to a significant absorption. The potential use of a waveguide simulator to characterize approximately the performance of the proposed metamaterial structure is investigated.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
Journal or Publication Title: | IEEE Transactions on Antennas and Propagation | ||||
Publisher: | IEEE | ||||
ISSN: | 0018-926X | ||||
Official Date: | July 2007 | ||||
Dates: |
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Volume: | Vol.55 | ||||
Number: | No.7 | ||||
Number of Pages: | 8 | ||||
Page Range: | pp. 1955-1962 | ||||
DOI: | 10.1109/TAP.2007.900228 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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