Title :
8-pole superconducting quasi-elliptic function filter for mobile communications application
Author :
Hong, J.S. ; Lancaster, M.J. ; Jedamzik, D. ; Greed, R.B.
Author_Institution :
Sch. of Electron. & Electr. Eng., Birmingham Univ., UK
Abstract :
This paper presents recent developments of an 8-pole planar high temperature superconductor bandpass filter with a quasi-elliptic function response. A novel planar filter configuration that allows a pair of transmission zeros to be placed at the band edges is described. The miniature filter has a bandwidth of 15 MHz at a centre frequency of 1777.5 MHz it is designed for mobile communication base station applications. The filter is fabricated using double sided YBCO thin film on an MgO substrate of size 0.3/spl times/22.5/spl times/39 mm. The preliminary results are presented.
Keywords :
UHF filters; band-pass filters; barium compounds; elliptic filters; high-temperature superconductors; land mobile radio; microstrip filters; passive filters; poles and zeros; resonator filters; superconducting microwave devices; superconducting resonators; superconducting thin films; yttrium compounds; 15 MHz; 1777.5 MHz; 77 K; 8-pole UHF filter; HTS bandpass filter; MgO; MgO substrate; YBaCuO; base station applications; double sided YBCO thin film; high temperature superconductor; miniature filter; mobile communications application; planar filter configuration; quasi-elliptic function response; superconducting filter; transmission zeros; Band pass filters; Bandwidth; Base stations; Filtering theory; Frequency; High temperature superconductors; Mobile communication; Superconducting filters; Transistors; Yttrium barium copper oxide;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.689394
