Electronic Science and Technology ›› 2024, Vol. 37 ›› Issue (12): 42-47.doi: 10.16180/j.cnki.issn1007-7820.2024.12.007

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Tunable THz Leaky Wave Antenna Based on Artificial Plasmons

ZHAO Ziwen, LU Yingmei, TAN Kangbo   

  1. School of Electronic Engineering,Xidian University,Xi'an 710071,China
  • Received:2023-04-26 Online:2024-12-15 Published:2024-12-16
  • Supported by:
    National Natural Science Foundation of China(61086338)

Abstract:

In recent years, surface plasmon polaritons has been developed rapidly and applied in many fields. Spoof surface plasmon polaritons, which is inspired by the surface plasmon phenomenon polaritons, is proposed in the form of constructing periodic grooves on the metal surface, and in turn achieving the surface plasmon polaritons phenomenon on the microwave or terahertz band. Based on the artificial surface plasmon theory, a planar asymmetric leaky wave antenna is proposed for indoor communication. The antenna has the characteristics of beam scanning and can achieve 67° beam scanning within 11.5~15.0 GHz. At the same time, a tunable gap and a matching branch are added into the periodic unit to control the direction of the antenna main beam by changing the gap size. The gain of the antenna at all frequency points is higher than 8.5 dBi, and the efficiency is higher than 75% in the full frequency band. In this study, the performance of the antenna in indoor communication is discussed, and the optimal placement area of the antenna is discussed by analyzing the field distribution of the antenna in different positions, which provides theoretical guidance for the application of artificial surface plasmon tunable leaky wave antenna in indoor communication.

Key words: spoof surface plasmon polaritons, leaky wave antennas, radio propagation, indoor communication, tunable antennas, periodic modulation, millimeter wave, dispersion analysis

CLC Number: 

  • TN820