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Design of a Frequency Reconfigurable Broadband THz Antenna Based on the Vanadium Dioxide

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Abstract

In this article, the design of a frequency reconfigurable broadband THz antenna based on vanadium dioxide (VO2) is investigated. Instead of being fed by the microstrip line directly, a windmill-shaped feeding structure is designed to provide a proximity-coupled feeding method. Many modes with contiguous resonant frequencies can be excited to obtain the wideband performance. The proposed antenna combines gold with metamaterial VO2. Thanks to insulator-metal phase transition characteristic of VO2 at phase transition temperature (68 °C), we can change the length of the resonant branches to realize frequency reconfiguration by changing the external temperature (T). The simulated results illustrate that when T = 50 °C (State I), such an antenna has a bandwidth of 35.2% (7.01–10 THz) with S11 below − 10 dB, and a maximum gain of 6.62 dBic. When T = 80 °C (State II), it has a bandwidth of 21.8% (5.77–7.18 THz) with S11 below − 10 dB, and a maximum gain of 4.49 dBic. Thus, we realize a design of a proximity-coupled antenna with reconfigurable wideband over the THz band.

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Funding

This work was supported by the Open Research Program in China’s State Key Laboratory of Millimeter Waves (Grant No. K201927), and Jiangsu Overseas Visiting Scholar Program for the University prominent Young & Middle-aged Teachers and Presidents.

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Authors and Affiliations

  1. College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China

    Hai-Feng Zhang, Guo-Biao Liu, Tong Huang & Li Zeng

  2. State Key Laboratory of Millimeter Waves of Southeast University, Nanjing, 210096, China

    Hai-Feng Zhang

  3. Advanced Materials and Liquid Crystal Institute, Kent State University, Kent, OH, 44242, USA

    Hai-Feng Zhang

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  1. Hai-Feng Zhang
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  2. Guo-Biao Liu
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  3. Tong Huang
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  4. Li Zeng
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Correspondence to Hai-Feng Zhang or Guo-Biao Liu.

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Zhang, HF., Liu, GB., Huang, T. et al. Design of a Frequency Reconfigurable Broadband THz Antenna Based on the Vanadium Dioxide. Plasmonics 15, 1035–1041 (2020). https://doi.org/10.1007/s11468-020-01129-3

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  • DOI: https://doi.org/10.1007/s11468-020-01129-3

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