High Tc harmonic mixer applied to Josephson junction array voltage standard at NIM

Author

Xue, S.Q. ; Li, H.H. ; Shen, X.C. ; Wang, H.B. ; Xu, W.W. ; Wu, P.H.

Author_Institution

Nat. Inst. of Metrol., Beijing, China

fYear

1996

fDate

17-21 June 1996

Firstpage

225

Abstract

Summary form only given, as follows.High Tc superconducting (YBCO) Josephson junction harmonic mixer has been used to improve the spectrum purity of the microwave source in the JJAVS at NIM. Compare with the microwave source using source locking counter EIP 578B, the spectrum purity of the microwave source has been improved significantly from -25 dBc/Hz (offset /spl plusmn/500 kHz) to -58 dBc/Hz (offset /spl plusmn/10 kHz). Therefore, the uncertainty of the JJAVS was reduced.

Keywords

Josephson effect; barium compounds; high-temperature superconductors; measurement standards; microwave mixers; superconducting junction devices; superconducting microwave devices; voltage measurement; yttrium compounds; JJAVS; Josephson junction array; NIM; YBaCuO; harmonic mixer; high Tc superconductors; microwave source; spectrum purity; uncertainty; voltage standard; Counting circuits; Diodes; Frequency; Gunn devices; High temperature superconductors; Josephson junctions; Metrology; Uncertainty; Voltage; Yttrium barium copper oxide;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements Digest, 1996 Conference on

Conference_Location

Braunschweig, Germany

Print_ISBN

0-7803-3376-4

Type

conf

DOI

10.1109/CPEM.1996.547042

Filename

547042