基于人工等离激元的可调谐太赫兹漏波天线

doi:10.16180/j.cnki.issn1007-7820.2024.12.007

摘要/Abstract

摘要：

近年来,表面等离激元快速发展,应用于较多领域。人工表面等离子体激元是受到表面等离子体激元现象的启发而被提出,形式表现为在金属表面上构建周期性的孔槽,进而在微波或太赫兹波段实现等离激元现象。文中基于人工表面等离激元理论提出了一种应用于室内通信的平面非对称漏波天线,该天线具有波束扫描的特性,可以在11.5~15.0 GHz内实现67°的波束扫描。同时在周期单元内加入了可调谐的缝隙和用于匹配的枝节,通过改变缝隙尺寸达到控制天线主波束方向的效果。天线在各个频点的增益均高于8.5 dBi,效率在全频段高于75%。讨论了该天线在室内通信中的性能,通过分析天线在不同位置下的场分布来讨论天线的最佳摆放区域,为人工表面等离激元可调谐漏波天线在室内通信中的应用提供了理论指导。

关键词: 人工表面等离激元, 漏波天线, 电波传播, 室内通信, 可调谐天线, 周期性调制, 毫米波, 色散分析

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

中图分类号:

TN820

赵子文, 卢映湄, 谭康伯. 基于人工等离激元的可调谐太赫兹漏波天线[J]. 电子科技, 2024, 37(12): 42-47.

ZHAO Ziwen, LU Yingmei, TAN Kangbo. Tunable THz Leaky Wave Antenna Based on Artificial Plasmons[J]. Electronic Science and Technology, 2024, 37(12): 42-47.

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