Microwave measurements on YBaCuO thin films and realisation of microwave superconducting devices
Lepercq, P × Carru, JC Mehri, F Crosnier, Y Bourzgui, N François, I DeBoeck, J Borghs, Gustaaf #
Journal de physique iv vol:6 issue:C3 pages:391-396
Two characterisations methods in microwaves are presented. They permit to obtain sigma*, Rs and lambda for a HTS film without the need of any theoretical model for the superconductivity. The best film tested exhibits at 35GHz and 78K a Rs value of 10m Omega, at least three times lower than the copper one. A quasi-integrated oscillator has been realised on a 1cm(2) area: it oscillates at 12GHz and close to liquid nitrogen temperature. At lower temperatures an output power of +3dBm and a phase noise of -100dBc/Hz at 100kHz from the carrier have been recorded.