Phase-Locking of a Gunn Oscillator at 3mm Waveband Using High
Temperature Superconducting Josephson Junction Harmonic Mixer
WANG Huabing, XU Weiwei, CHENG Qiheng, JI Zhengming, GAO Ruizhang, WU Peiheng, XU Zhicai*
Department of Information Physics, Nanjing University, Nanjing 210093;
and Center for Advanced Studies in Science and Technology of Microstructures, Nanjing 210093
*Purple Mountain Observatory, Academia Sinica, Nanjing 210008
Phase-Locking of a Gunn Oscillator at 3mm Waveband Using High
Temperature Superconducting Josephson Junction Harmonic Mixer
WANG Huabing;XU Weiwei;CHENG Qiheng;JI Zhengming;GAO Ruizhang;WU Peiheng;XU Zhicai*
Department of Information Physics, Nanjing University, Nanjing 210093;
and Center for Advanced Studies in Science and Technology of Microstructures, Nanjing 210093
*Purple Mountain Observatory, Academia Sinica, Nanjing 210008
Abstract： A Gunn oscillator at 3mm waveband has been phase-locked to a synthesizer local oscillator using a high Tc YBa2C3O7-δ Josephson junction operated at 77K as the harmonic mixer, with harmonic numbers up to 52. The observed spectrum of the phase-locked output at the intermediate frequency (IF) shows clearly that the quality of the phase-locking is very good. To drive the analogue phase locking loop successfully, it is essential to have IF output and signal-to-noise ratio both as high as possible.
WANG Huabing;XU Weiwei;CHENG Qiheng;JI Zhengming;GAO Ruizhang;WU Peiheng;XU Zhicai*. Phase-Locking of a Gunn Oscillator at 3mm Waveband Using High
Temperature Superconducting Josephson Junction Harmonic Mixer
[J]. 中国物理快报, 1995, 12(4): 253-256.
WANG Huabing, XU Weiwei, CHENG Qiheng, JI Zhengming, GAO Ruizhang, WU Peiheng, XU Zhicai*. Phase-Locking of a Gunn Oscillator at 3mm Waveband Using High
Temperature Superconducting Josephson Junction Harmonic Mixer
. Chin. Phys. Lett., 1995, 12(4): 253-256.
1995, Vol. 12 
