A frequency mixing and phase locking system is designed, in which electromagnetic shielding, microwave coupling, and intermediate frequency (IF) measurement arrangements are in- cluded. In lieu of liquid nitrogen, a p...A frequency mixing and phase locking system is designed, in which electromagnetic shielding, microwave coupling, and intermediate frequency (IF) measurement arrangements are in- cluded. In lieu of liquid nitrogen, a pulse tube cryo- cooler is used to cool the whole system. With Jo- sephson grain boundary junction as the mixing ele- ment, the 96th harmonic frequency mixing at 3 mm waveband is obtained, and phase-locked voltage- controlled oscillator (VCO) is realized.展开更多
A frequency mixing system including microwave coupling and intermediate frequency (IF) measurement arrangements is designed. In lieu of liquid nitrogen, a pulse tube cryocooler is used to cool the whole system. With Y...A frequency mixing system including microwave coupling and intermediate frequency (IF) measurement arrangements is designed. In lieu of liquid nitrogen, a pulse tube cryocooler is used to cool the whole system. With YBa2Cu3O7/Yttrium stabilized zirconia (YBCO/YSZ) bicry-stal Josephson junction as the mixing element, 36th harmonic frequency mixing at the 8 mm waveband is obtained.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.10474036&10534060)the National Basic Research Program of China(2006CB601006).
文摘A frequency mixing and phase locking system is designed, in which electromagnetic shielding, microwave coupling, and intermediate frequency (IF) measurement arrangements are in- cluded. In lieu of liquid nitrogen, a pulse tube cryo- cooler is used to cool the whole system. With Jo- sephson grain boundary junction as the mixing ele- ment, the 96th harmonic frequency mixing at 3 mm waveband is obtained, and phase-locked voltage- controlled oscillator (VCO) is realized.
基金This work was supported by the Ministry of Science and Technology of China (Grant No. G19990646).
文摘A frequency mixing system including microwave coupling and intermediate frequency (IF) measurement arrangements is designed. In lieu of liquid nitrogen, a pulse tube cryocooler is used to cool the whole system. With YBa2Cu3O7/Yttrium stabilized zirconia (YBCO/YSZ) bicry-stal Josephson junction as the mixing element, 36th harmonic frequency mixing at the 8 mm waveband is obtained.
