基于法布里-珀罗谐振腔的W波段电子顺磁共振探头研制

罗文尤, 荣星

A W-Band Electron Paramagnetic Resonance Probe Based on Fabry-Perot Cavity

LUO Wenyou, RONG Xing

图5 W波段顺磁共振谱仪结构图[30]. 超导磁体生成B0场. 矩形框1为W波段发射机. 线路中84.5 GHz的本振微波信号与9~10 GHz的信号混频，生成93.5~94.5 GHz的W波段微波. 矩形框2为W波段接收机，探头出射的信号经过低噪声放大器后与84.5 GHz的本振信号混频，得到X波段信号进入X波段微波桥，经锁相放大器检测转换为数字信号

Fig. 5 Schematic diagram of the W-band EPR spectrometer. The superconducting magnet generates B 0. Box 1 stands for the W-band microwave(MW) transmitter. An 84.5 GHz Local Oscillator(LO) microwave signal is mixed with the 9~10 GHz signal to generate a 93.5~94.5 GHz W-band microwave. Box 2 stands for the W-band microwave receiver. The output signal from the probe is amplified by a low-noise amplifier (LNA) and mixed with the 84.5 GHz LO signal. The output signal from the down converter mixer is fed into the X-band microwave bridge. The EPR signal is collected by the lock-in amplifier and converted to the digital signal