MICROWAVE MEASUREMENTS ON YBACUO THIN-FILMS AND REALIZATION OF MICROWAVE SUPERCONDUCTING DEVICES

Two characterisations methods in microwaves are presented. They permit to obtain sigma, Rs and lambda for a HTS film without the need of an y theoretical model for the superconductivity. The best film tested ex hibits 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 real ised on a 1cm(2) area: it oscillates at 12GHz and close to liquid nitr ogen temperature. At lower temperatures an output power of +3dBm and a phase noise of -100dBc/Hz at 100kHz from the carrier have been record ed.