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设计了工作在太赫兹频段的无线通信系统,基带部分采用16QAM调制体制,射频部分采用混频器实现两级上下变频,功放部分采用“固态功率放大+电真空器件放大”级联的功率放大技术,实现了0.14THz频段W量级的功率输出。接收端采用全固态常温接收技术,接收机等效噪声温度为1100K,接收灵敏度达到-57dBm。采用两个增益50dBi的卡塞格伦天线,在成都市双流区与新津县之间开展了距离21km的无线通信试验,单路实时通信速率达到5Gbps,误码率低于10~(-6)。并成功同时实时传输了两路符合HD-SDI标准的无压缩高清视频数据流,每一路的标准有效速率达到1.485Gbps。
Designed the wireless communication system working in the terahertz frequency band, the baseband part adopts 16QAM modulation system, the RF part adopts the mixer to realize the two-level up-down conversion, the power amplifier part adopts the power of cascaded power amplification and electric vacuum device amplification Amplification technology, to achieve 0.14THz band W-level power output. Receiver using all-solid-state room temperature receiver technology, the receiver noise temperature equivalent to 1100K, the receiver sensitivity of -57dBm. Two 50dBi gain Cassegrain antennas were used to test the wireless communication distance of 21km between Shuangliu District of Chengdu and Xinjin County. The single-channel real-time communication rate reached 5Gbps and the bit error rate was less than 10 ~ (-6) . And successfully transmitted two uncompressed HD video data streams that meet the HD-SDI standard in real time. The standard effective rate of each channel reaches 1.485Gbps.