In order to increase the short- distance wireless data transfer rate to 10 Gbit/s, a THz wireless communication system adopting photo electricity technology was built. In which, the optical emitter designed with high- gain antenna and waveguide output photodiode module (WG -PM) helped to improve the systematic transmission distance. WG - PM was composed of uni-traveling-carrier photodiode( UTC - PD), broadband high electron mobility transistor(HEMT) amplifier and planar - circuit - to - waveguide transition substrate. It analyzed optical ray tracing method that fit for lens antenna of terahertz radiation emitter. The simulation results show: the WG - PM can output maximum power to 8 dBm in 120 GHz with bandwidth over 16 GHz/3 dB.%为了使无线通信系统短距离数据传输速率达到10 Gbit/s,利用光电结合技术以THz波段为载波,建立了太赫兹无线通信系统.为提高无线通信系统的传输距离,设计了带有高增益天线和波导输出光电二极管模块的光学发射器.模块采用载波单向导通光电二极管、宽带高电子迁移率晶体管放大器和平面电路-波导转换衬底等技术.并对适合分析太赫兹波段发射器透镜天线的射线追迹法进行分析.仿真结果显示:该WG-PM在125 GHz时最大输出功率为8 dBm,3 dB带宽大于16 GHz.
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