310 GHz太赫兹通信系统设计

太赫兹波具有传输速率高、容量大、方向性好、抗干扰能力强等特点，由于大气损耗大和大功率源的缺乏，较适用于短距离无线通信。基于300 GHz频段的优良特性，设计了一种310 GHz太赫兹无线通信系统。通信链路基于美国亚毫米波与太赫兹产品制造公司(VDI)的谐波混频和超外差收发，系统主要由倍频器、功率放大器、滤波器和VDI次谐波混频器构成。根据链路预算搭建实际通信系统，仿真和实验结果证明：随着通信速率的升高，解调信号的失真逐渐增加。通信距离1 m条件下，系统能实现10 Gbps无误码传输，当速率达到11 Gbps时，误码率为5×10-6。

Design of 310 GHz Terahertz communication system

Terahertz wave has the characteristics of high transmission rate, large capacity, good directivity and strong anti-interference ability, but it is more suitable for short-distance wireless communication due to the large atmospheric loss and the lack of high-power sources. Based on the excellent characteristics of the 300 GHz band, a 310 GHz terahertz wireless communication system is designed. The communication link is based on Virginia Diodes Inc(VDI) harmonic mixing and superheterodyne transmission. The system is mainly composed of frequency multiplier, power amplifier, filter and VDI subharmonic mixer. The actual communication system is built according to the link budget. The simulation and experimental results show that the distortion of the demodulated signal increases with the increase of the communication rate. The system can achieve 10 Gbps error-free transmission with a communication distance of 1 m. When the rate reaches 11 Gbps, the bit error rate is 5×10-6.