Title :
A novel compact high temperature superconducting CPW bandpass filter
Author :
Ma, Zhewang ; Kawaguchi, Tamio ; Kobayashi, Yoshio ; Koizumi, Daisuke ; Satoh, Kei ; Narahashi, Shoichi
Author_Institution :
Dept. of Electr. & Electron. Syst., Saitama Univ., Japan
Abstract :
A novel high temperature superconducting interdigital bandpass filter is proposed by using coplanar waveguide quarter-wavelength resonators. The CPW resonators are arranged in parallel, and consequently the filter becomes very compact. The filter is a 5-pole Chebyshev BPF with a midband frequency of 5.0GHz and an equal-ripple fractional bandwidth of 3.2%. It is fabricated using a YBCO film deposited on an MgO substrate. The measured filtering characteristics agree well with EM simulations and show a low insertion loss in spite of the small size of the filter.
Keywords :
band-pass filters; barium compounds; coplanar waveguides; high-temperature superconductors; magnesium compounds; superconducting filters; yttrium compounds; Chebyshev BPF; YBa2Cu3O7; coplanar waveguide quarter-wavelength resonators; high temperature superconducting CPW bandpass filter; interdigital bandpass filter; Band pass filters; Bandwidth; Chebyshev approximation; Coplanar waveguides; Frequency; High temperature superconductors; Resonator filters; Substrates; Superconducting filters; Yttrium barium copper oxide;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1606812
