A high performance HTS filter for the third generation mobile communications

J. D. Huang*, S. Z. Li, Q. D. Meng, L. Sun, Q. Zhang, F. Li, X. Q. Zhang, C. G. Li, A. S. He, H. Li, C. Z. Gu, Q. Luo, Y. S. He

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Design and fabrication of an ultra selective 12-pole HTS band-pass filter with three pairs of transmission zeroes at finite frequencies is presented. This filter was designed to have quasi-elliptic response with 5 MHz bandwidth in the 3G communication band (a fractional bandwidth of 0.0025). The filter was fabricated on a 2 inch-diameter 0.43 mm-thick sapphire wafer with double-sided YBCO films. The measured results showed that the pass-band center frequency of the filter is 2.038 GHz at 68 K with a pass-band insertion loss of -0.67 dB and a return loss better than -15 dB. The measured filter also exhibited ultra high skirt slop of 200-300 dB/MHz and excellent out of band rejections (better than 60 dB for f-f0 > 2.7 MHz and better than 90 dB for f-f0 > 7.5 MHz, where f0 is the pass-band center frequency).

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages1671-1672
Number of pages2
DOIs
Publication statusPublished - 2006
Externally publishedYes
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 10 Aug 200617 Oct 2006

Publication series

NameAIP Conference Proceedings
Volume850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Country/TerritoryUnited States
CityOrlando, FL
Period10/08/0617/10/06

Keywords

  • Filter
  • HTS
  • Wireless communication

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