基于光混频的太赫兹双频通信天线的设计和仿真
投稿时间:2019-01-22  修订日期:2019-02-26  点此下载全文
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作者单位E-mail
陈景源 中国科学院福建物质结构研究所
中国科学院大学 
jingyuan10@126.com 
林中晞 中国科学院福建物质结构研究所  
林琦 中国科学院福建物质结构研究所
中国科学院大学 
 
苏辉 中国科学院福建物质结构研究所 huisu@fjirsm.ac.cn 
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:比较了宽带天线和窄带天线的优缺点,设计了一种用于太赫兹无线通信的双频天线。其是由两个分层且垂直分布的偶极天线组成,两天线处于高度不同的介质层上以避免互相干扰和短路,并具有各自的THz扼流圈以提高性能。上层天线通过介质层开孔处的金属探针连接到低温砷化镓衬底,实现了和下层天线共用一个光照区。上层和下层天线尺寸不同,具有不同的工作频率,在各自的偏置电压回路控制下,不需要调整泵浦光就能实现垂直偏振的双频工作。通过调整尺寸,还可使工作频率落在不同的大气窗口内。在0.21 THz、0.35 THz、0.41 THz、0.68 THz、0.85 THz和0.93 THz等大气窗口内,其保持了偶极天线在单频点具有较高性能的优点:最佳总效率分别为14.9%、28.4%、33.9%、28.4%、21.6%和19.8%,最大实际增益分别为2.99 dB、10.6 dB、11.8 dB、18.4 dB、18.2 dB和18.3 dB。
中文关键词:光混频,太赫兹,无线通信,双层天线,偶极天线,双频
 
Design and simulation of dual-frequency terahertz antenna for wireless communication by photomixing
Abstract:After comparing wide-band antenna and narrow-band antenna, a dual-frequency Terahertz antenna for wireless communication was designed. It consisted of two dipole antennas which are located on two different layers and arranged vertically to avoid connection and interaction. The two dipoles both had THz chokes to improve performance, and different sizes to operate in two different frequencies. The upper dipole use metal probe to connect the LT-GaAs substrate through the hole of substrate, and share the same photomixer with the lower dipole. The photomixer can be lighted by the same light for pumping, while the two dipole can be controlled by different circuit for bias. So they can work at different frequency and vertical direction of polarizations. They can adjust for the air’s low-loss frequency by changing the size. The dual-frequency antenna had high performance because of containing two dipole antennas. At the air’s low-loss frequency of 0.21THz, 0.35 THz, 0.41 THz, 0.68 THz, 0.85 THz and 0.93 THz, it had total efficiencies of 14.9%, 28.4%, 33.9%, 28.4% and 21.6% respectively, and max realized gain of 2.99 dB, 10.6 dB, 11.8 dB, 18.4dB, 18.2 dB and 18.3 dB respectively.
keywords:Photomixing, THz, wireless  communication, dual-layer  antennas, dipole  antenna, dual-frequency
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