Ag圆锥天线阵列的太赫兹波受激辐射仿真研究.PDFVIP

·实验研究 Ag圆锥天线阵列的太赫兹波受激辐射仿真研究 1 1 2 1 (1.湖北大学物理学与电子技术学院，湖北 武汉 430062；2.首都师范大学物理系，北京 100008) 胡明哲 楼文杰 牧凯军 顾豪爽 摘 要：根据宽频带THz辐射天线的要求，设计了圆锥结构的微米量级金属Ag天线及其阵列。采用矩量法分析了天线电场积分方程的求解 方法，并采用CST软件仿真了Ag圆锥天线阵列能辐射太赫兹波特性，理论分析和数值仿真结果表明，单根Ag微米圆锥天线能产生有效的宽带 THz辐射，辐射增益可达22.7dBi。而其组成的纳米圆锥天线阵则可进一步改善辐射方向性，提高增益到42.5dBi。该结果将有助于指导太赫 兹波辐射源的实验研究。 关键词：太赫兹波辐射；圆锥天线；增益；天线阵列 CST simulation of the Terahertz irradiation from Ag cone antenna arrays 1 1 2 1 Mingzhe Hu Wenjie Lou Kaijun Mu Haoshuang Gu (1.Faculty of Physics and Electronic Technic, Hubei University, Wuhan, Hubei, 430062;2. Department of Physics, Capital Normal University, Beijing, 100008) Abstract:In the present article, Ag microcone antenna and its arrays are designed according to the requirement of wide bandwidth terahertz irradiation property. Moment method is employed to analyze the solution process of the integrate equation of the irradiated electric field. And CST microwave studio software is employed to simulate the terahertz irradiation property of Ag microcone antenna array. Theoretical analysis and simulation results both manifest that single Ag cone antenna of microscale size can irradiate a wide bandwidth THz wave with the gain of 22.7dBi, while its corresponding antenna array with proper configuration can further improve the radiation pattern and enhance the gain to 42.5dBi. The theoretical analysis and CST simulation results will be useful for the guidance of experimental investigation of terahertz irradiation sources. Key words:terahertz wave radiation; cone antenna; gain; antenna array 1 引言 成为固态THz波源器件实用化的关键。 太赫兹波（terahertz wave,THz）是介于亚毫米波与红外 基于上述技术背景，本文以Ag圆锥天线及其阵列为研究对 线之间的电磁波，是目前电磁波谱中最后未被完全开发的频段 象，研究其受激辐射太赫兹波的特性，建立Ag圆锥天线辐射电 资源。由于THz频率范围处于电子学和光子学的交叉区域，其性 场的矩量分析方法并借助CST微波仿真软件研究Ag纳米圆锥天 质表现出一系列不同于其他电磁辐射的特殊性。相比于传统的