An HTS 21-pole microstrip filter for IMT-2000 base stations with steep attenuation

Author

Hattori, Wataru ; Yoshitake, Tsutomu ; Takahashi, Kuniharu

Author_Institution

Fundamental Res. Labs., NEC Corp., Ibaraki, Japan

Volume

11

Issue

3

fYear

2001

fDate

9/1/2001 12:00:00 AM

Firstpage

4091

Lastpage

4094

Abstract

We developed a 21-pole high-temperature superconductor thin-film microstrip filter with steep attenuation. This filter is applicable in the International Mobile Telecommunications-2000 (IMT-2000) base station receiver system, where high selectivity is needed to avoid interference from signals in the personal handyphone system (PHS) band just below the IMT-2000 band. The out-of-band rejection of this filter 1 MHz below the passband edge is more than 40 dB. Owing to the improvements of the design and the fabrication processes, we also eliminated the need for a tuning process in the fabrication processes in order to reduce the production costs and the turnaround time.

Keywords

high-temperature superconductors; microstrip filters; mobile radio; radio receivers; superconducting filters; superconducting microwave devices; superconducting thin films; IMT-2000 base station receiver; attenuation; fabrication process; multipole high temperature superconductor thin film microstrip filter; Attenuation; Band pass filters; Base stations; Fabrication; High temperature superconductors; Interference; Microstrip filters; Passband; Superconducting filters; Superconducting thin films;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2001.962260

Filename

962260