Equivalent circuit for VO2 phase change material film in reconfigurable frequency selective surfaces

We developed equivalent circuits of phase change materials based on vanadium dioxide (VO2) thin films. These circuits are used to model VO2 thin films for reconfigurable frequency selective surfaces (FSSs). This is important as it provides a way for designing complex structures. A reconfigurable FSS...

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Bibliographic Details
Published in:Applied physics letters 2015-12, Vol.107 (25)
Main Authors: Sanphuang, Varittha, Ghalichechian, Nima, Nahar, Niru K., Volakis, John L.
Format: Article
Language:English
Subjects:
Applied physics
Circuits
Computer simulation
Equivalent circuits
Frequency selective surfaces
Phase change materials
Reconfiguration
Switches
Thermal energy
Thin films
Vanadium dioxide
Vanadium oxides
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Summary:We developed equivalent circuits of phase change materials based on vanadium dioxide (VO2) thin films. These circuits are used to model VO2 thin films for reconfigurable frequency selective surfaces (FSSs). This is important as it provides a way for designing complex structures. A reconfigurable FSS filter using VO2 ON/OFF switches is designed demonstrating −60 dB isolation between the states. This filter is used to provide the transmission and reflection responses of the FSS in the frequency range of 0.1–0.6 THz. The comparison between equivalent circuit and full-wave simulation shows excellent agreement.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4938468