A High Performance HTS Filter Subsystem for CDMA
A High Performance HTS Filter Subsystem for CDMA
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DOI：
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发表时间：
2004-08
影响因子：
5
通讯作者：
X. Guo;B. Cao;B. Wei;X. Zhang;Z. Yin;W. He;S. He;L. Gao;M. Zhu;B. Gao;B. A. Aminov-B.
中科院分区：
文献类型：
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作者：
X. Guo;B. Cao;B. Wei;X. Zhang;Z. Yin;W. He;S. He;L. Gao;M. Zhu;B. Gao;B. A. Aminov-B.
我们设计并制作了一个用于CDMA移动的通信的16极高温超导滤波器，在830 MHz处具有1.2%的分数带宽。在本文中，我们描述的设计，测试过程和所获得的结果。该滤波器制作在46 mm × 29 mm × 0.43mm的蓝宝石衬底上，衬底两侧镀有YBCO薄膜。在70 K温度下，滤波器的带内插入损耗小于0.29dB，带外抑制优于70 dB，带边陡度大于40 dB/MHz。我们还制作和测试了一个高温超导子系统，它包括16极高温超导滤波器，低噪声放大器（LNA）和斯特林冷却器。冷却至70 K时，高温超导子系统的噪声系数为0.75 dB，驻波比为1.5，增益为21.5 dB。
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 46mm×29mm×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.