頁籤選單縮合
題 名 | A High Performance HTS Filter Subsystem for CDMA |
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作 者 | Guo,X. B.; Cao,B. S.; Wei,B.; Zhang,X. P.; Yin,Z. S.; He,W. J.; He,S.; Gao,L. M.; Zhu,M. H.; Gao,B. X.; Aminov,B.; Getta,M.; Kolesov,S.; Piel,H.; Pupeter,N.; Wehler,D.; | 書刊名 | Chinese Journal of Physics |
卷 期 | 42:4(2) 民93.08 |
頁 次 | 頁463-467 |
分類號 | 337.84 |
關鍵詞 | |
語 文 | 英文(English) |
英文摘要 | We designed and fabricated a 16-pole high temperature superconducting (HTS) filter with a 1.2% fractional bandwidth at 830 MHz for CDMA mobile communications. In this paper we describe the design, the test procedure and the obtained results. The filter was fabricated on a 46 mm × 29 mm × 0.43 mm sapphire substrate which was double side coated with YBCO thin films. At a temperature of 70 K, the in-band insertion loss of the filter is less than 0.29 dB, its out-of-band rejection is better than 70 dB and the steepness of the band edges is larger than 40dB/MHz. We also fabricated and tested a HTS subsystem, which consists of the 16-pole HTS filter, a low noise amplifier (LNA) and a Stirling Cooler. Cooled down to 70 K, the HTS subsystem shows a good performance of 0.75 dB noise figure and 1.5 voltage standing wave ratio (VSWR) with 21.5 dB gain. |
本系統中英文摘要資訊取自各篇刊載內容。