Terahertz(THz) wave is the last comprehensive research and development wave band of the electromagnetic spectrum. In order to achieve the terahertz signal spectrum measurement, a study of THz spectrometer based on high temperature superconducting Josephson junctions(JJS) is launched. The YBa2Cu3O7 (YBCO) bi-crystal Josephson junctions with log-periodic antennas are utilized as detectors. Under the low temperature, by using the signal measuring system, data acquisition and LabVIEW control interface, etc., the THz spectrometer based on high temperature superconducting JJS is finally realized and reaches the measurement of the frequency range from 0.1THz to 2.5THz. The frequency resolution reaches 0.04GHz (@114GHz) and 2GHz(@1.78THz). The influence factors of resolution are preliminarily analyzed.%为实现对太赫兹信号的频谱测量,以集成对数周期天线的YBa2Cu3O7(YBCO)约瑟夫森双晶结为信号探测器,开展了基于高温超导约瑟夫森结的小型频谱检测仪的研制.在低温环境下,通过THz信号耦合、信号测量、数据读取及LabVIEW控制界面等功能模块,利用Hilbert逆变换完成信号的频谱恢复,最终成功研制出高温超导约瑟夫森结频谱检测仪,并对其进行了基本性能测试,实现了对0.1~2.5 THz的信号检测,频率分辨力高达0.04 GHz(@114 GHz)和2 GHz(@1.78 THz).此外,对其分辨力的影响因素进行了初步分析.
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