Title :
Multiple frequency surface resistance measurement technique using a multimode TE/sub 01n/ cylindrical cavity on a TlBaCaCuO superconducting film
Author :
Derov, J.S. ; Drehman, A.J. ; Suscavage, M.J. ; Andrews, R.J. ; Cohen, E. ; Ianno, N. ; Thompson, D.
Author_Institution :
Rome Lab., Electromagn. & Reliability Directorate, Hanscom AFB, MA, USA
Abstract :
A multiple-frequency surface resistance measurement technique for high-temperature superconductors (HTSs) has been developed using a modified multimode cylindrical cavity made of niobium operating in the superconducting state. The surface resistance vs. frequency relationship of TlBaCaCuO HTS thin films was determined over the frequency range of 50-100 GHz with an extrapolation down to 1 GHz. The TE/sub 01n/ (n=1, 2, and 3) modes of the cylindrical niobium waveguide cavity had resonances at 52, 71, and 96 GHz, and the measured surface resistances at these frequencies were 5.1, 8.5, and 21.1 m Omega , respectively.<>
Keywords :
barium compounds; calcium compounds; cavity resonators; electric resistance; electric resistance measurement; high-temperature superconductors; microwave measurement; superconducting thin films; thallium compounds; 1 to 100 GHz; Nb cavity; TE/sub 01n/ mode; TlBaCaCuO superconducting film; high-temperature superconductors; multimode cylindrical cavity; multiple-frequency; surface resistance measurement; waveguide cavity; Electrical resistance measurement; Extrapolation; Frequency measurement; High temperature superconductors; Niobium; Resonance; Superconducting thin films; Surface resistance; Surface waves; Tellurium;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
