Title :
Performance Improvements of a Microwave Oscillator Using High Temperature Superconducting Harmonic Mixer
Author :
Xu, W.W. ; Zhang, Y.F. ; Jiang, X.K. ; Ling, K.. ; Chen, J. ; Wu, P.H.
Author_Institution :
Nanjing Univ., Nanjing
fDate :
6/1/2007 12:00:00 AM
Abstract :
Based on YBa2Cu3O7 Josephson junction mounted on a pulse tube cryocooler, a compact superconducting harmonic mixer is used to phase-lock a microwave source at 3 mm waveband to a reference of high precision at much lower frequency, thus greatly improving the performances of the former. Currently the highest harmonic number at which phase locking can be realized is 60. The experimental system, main results, and the problem of how to increase the harmonic number are discussed in details.
Keywords :
high-temperature superconductors; microwave oscillators; superconducting junction devices; superconducting mixers; Josephson junction; high temperature superconducting harmonic mixer; microwave oscillator; pulse tube cryocooler; Frequency; High temperature superconductors; Josephson junctions; Microwave oscillators; Nitrogen; Schottky diodes; Semiconductor superlattices; Superconducting device noise; Superconducting microwave devices; Superconducting photodetectors; Harmonic frequency mixing; high temperature superconductor; phase-locking; pulse tube cryocooler;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.898610
