화학공학소재연구정보센터
Applied Surface Science, Vol.168, No.1-4, 316-319, 2000
Fabrication of novel 22 GHz hairpin type HTS microstrip filter using laser ablated thin films
The fabrication of high quality superconducting thin films using pulsed laser deposition (PLD) has been reported to find optimized processing conditions and to make millimeter-wave devices. High temperature superconducting (HTS) YBCO films were prepared on MgO (10 mm x 10 mm x 0.5 mm) substrates by PLD, The 3-pole bandpass filter centered at 22 GHz for satellite communication was designed consisting of hairpin type coupled-lines to reduce the configuration in size. YBCO films are c-axis oriented and show superconductive transition temperatures of 88-89 K with the transition widths <0.5 K. The insertion loss of passband at 70 K was about 5 dB. The measured frequency response of superconducting filter will be compared with the simulation result,