DocumentCode :
432699
Title :
A high temperature superconducting filter for future mobile telecommunication systems
Author :
McErlean, E.P. ; Jia-Sheng Hong
Author_Institution :
Department of Electrical, Electronic & Computer Engineering, Heriot-Watt University, Edinburgh EH14 4AS
Volume :
2
fYear :
2004
fDate :
12-14 Oct. 2004
Firstpage :
1117
Lastpage :
1119
Abstract :
This paper presents a narrow-band high temperature superconducting (HTS) bandpass filter of Yba2Cu3O7 (YBCO) on a sapphire substrate applicable to future mobile communications systems. The design and simulation of a ten-pole quasi-elliptic function filter implemented using a cascaded quadruplet trisection (QCT) coupling topology is discussed. The filter is designed to have a 10 MHz pass baud in the UMTS basestation receive band. The filter substrate was a sapphire wafer measuring 47mm x 17mm x .43 which had a double sided thin film coating of YBCO. The filter displayed a midband insertion loss of .6 dB at 1.970 GHz and a return loss better than (-10dB preliminary) over the pass band. A high performance out of band rejection associated with quasi-elliptic filter function was also recorded.
Keywords :
3G mobile communication; Band pass filters; Coupling circuits; Frequency; High temperature superconductors; Insertion loss; Microstrip filters; Mobile communication; Substrates; Superconducting filters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Conference, 2004. 34th European
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
1-58053-992-0
Type :
conf
Filename :
1419029
Link To Document :
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