The Research on 220‐GHz Signal Detecting System
The Research on 220‐GHz Signal Detecting System
复制标题
220GHz信号检测系统的研究
DOI：
10.1002/jnm.2655
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Yong Fan
中科院分区：
文献类型：
--
作者：
Zhongqian Niu;Bo Zhang;Yong Fan
本文介绍了我们对220 GHz信号监测系统的研究。该系统的检测频带为220 ~ 230 GHz，具有镜像频率识别能力。可检测信号范围从单音信号到1ghz，频率精度为1khz。更重要的是，太赫兹监测系统可以准确地估计单调信号和常见调制信号的中心频率。调制方式包括BPSK、QPSK、8PSK、16QAM、32QAM和64QAM。接收器的前端由一个220 GHz次谐波混频器和一个110 GHz三倍器组成，它们基于肖特基二极管。混合器和三联器均表现出良好的性能，保证了监测系统的正常运行。此外，对基带算法进行了改进，提高了效率，减少了计算量。信号检测实验表明，该系统能够识别出工作频带内未知信号的频率、功率、带宽和调制方式。
This paper presents our investigation into a 220‐GHz signal monitoring system. The detectable frequency band of the proposed system is 220 to 230 GHz with the ability to distinguish mirror frequency. The detectable signal ranging from one tone signal to 1 GHz and the frequency accuracy is 1 KHz. More importantly, the terahertz monitoring system can accurately estimate the center frequencies of monotone signals and common modulation signals. The modulation methods including BPSK, QPSK, 8PSK, 16QAM, 32QAM, and 64QAM. The front end of the receiver consists of a 220‐GHz subharmonic mixer and a 110‐GHz tripler that are based on Schottky diodes. Both the mixer and the tripler show great performance and guarantees the well operation of the monitoring system. In addition, the baseband algorithm is modified to improve efficiency and reduce computation. The experiment of signal detection shows the system can identify the frequency, power, bandwidth, and the modulation mode of the unknown signal during the operation band.