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Thermally Tunable Frequency‐Selective Surface Based on VO 2 Thin Film
Author(s) -
Polozov Viktor,
Maklakov Sergey S.,
Maklakov Sergey A.,
Mishin Alexey,
Petrov Dmitry,
Baskov Konstantin,
Politiko Alexey,
Chistyaev Vladimir,
Semenenko Vladimir,
Kisel Vladimir
Publication year - 2020
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.202000452
Subject(s) - materials science , reflector (photography) , selective surface , radio frequency , optoelectronics , tunable metamaterials , reflection coefficient , thin film , temperature coefficient , optics , reflection (computer programming) , frequency domain , band pass filter , metamaterial , electrical engineering , composite material , light source , physics , computer science , nanotechnology , programming language , engineering , mathematical analysis , mathematics
An approach to a design of tunable frequency‐selective surfaces (FSSs) for radio frequency (RF) domain based on vanadium dioxide (VO 2 ) thin films is proposed. As an example, a thermally tunable annular slot FSS with integrated VO 2 switchable elements for C‐band of the RF domain is described. Switching is based on abrupt change of conductivity of the VO 2 film, initiated by heating from room temperature to a temperature of the metal–insulator phase transition of 44 °C. A tuning mechanism of the FSS allows continuous change of frequency response from room temperature state, where the FSS acts as a band‐pass filter, to high‐temperature state, where the FSS works as a reflector. In the process of tuning, a reflection coefficient at a central frequency of the filter can be increased from −26.4 dB up to −2.2 dB. The proposed approach can be used for the design of tunable FSS for applications that allow thermal control of the frequency response.