Development of the Measurement System of Image Rejection Ratio for Millimeter/Sub-Millimeter Sideband-Separating(2SB) Receiver

点击翻译按钮获取中文摘要

I have developed the measurement system of image rejection ratio(IRR), which is one of the important performance of sideband separating(2SB) receiver in millimeter/sub-millimeter wave band and have installed on the 45-m millimeter wave telescope in Nobeyama Radio Observatory, National Astronomical Observatory of Japan. The IRRs were evaluated by measuring the relative amplitudes of the IF responses in the USB and LSB injecting a continuous wave(CW) signal generated by multiplying the output of the signal generator(SG) with the frequency multiplier to observation frequency band. I confirmed that we can measure IRR with an accuracy of±5% with my system.