【摘 要】
：
This paper presents the field trial results of a high temperature superconductor filter system (HTSFS) in a code division multiple access (CDMA) mobile communic
【机 构】
：
Department of Physics,Cryoelectra GmbH
【基金项目】
：
国家高技术研究发展计划(863计划)
论文部分内容阅读
This paper presents the field trial results of a high temperature superconductor filter system (HTSFS) in a code division multiple access (CDMA) mobile communication base station (BTS) in Tangshan, China. The center frequency of the HTSFS is 830 MHz with 1.4% fractional bandwidth. The noise figure (NF) of the HTSFS, including connectors and cables, is 0.8 dB. The field trial results show that after the HTSFS was installed in the receiver front-end of a CDMA base station, the transmitting power of handset was decreased by 3.1 dB on average. Up to now, the HTSFS has been running steadily in the base station for more than 22 months, demonstrating the reliability and stability of the system.
其他文献
《欢乐之家》具有自然主义倾向的一大特征就是突出强调社会环境对人的影响。小说里揭示的问题总是一个人的个人价值受到社会变革的影响。然而华顿的《欢乐之家》作品体现的自
文章采用长三角地区实际利用FDI与四种污染排放数据，通过建立联立方程对FDI与环境污染之间的关系进行了计量分析。结果表明：FDI对长三角环境质量的影响是规模效应、结构效应和
目的：在各类信息资源被广泛利用的今天，统计工作在医院管理中的作用发生巨大变化，新技术的使用，有助于统计工作效率和效果提高，促使专业统计人员必须创新求变，提升自身能力，主动参与
为了构建pEGFP-C1/U6载体介导MDR1短发卡RNA(short hairpin RNA,shRNA)表达的质粒,针对MDR1的19碱基大小的片段,分别设计2对寡核苷酸,形成双链后将其依次连入带有U6启动子的p
随着动漫行业的迅速发展，动漫领域对中职生提出了新的要求，不再是以前单纯简单地模仿或者改编已有的动漫形象，而是需要设计出别出心裁的新形象、新思路、新故事。新形势下我们必
随着物质文明与精神文明的高速发展，美术教育受到越来越多人的重视，并作为一种重要的社会文化活动被逐渐普及。作为一名美术教师，笔者在课前与课后不断地探索小学美术教育的新方
Temperature distribution over the absorber plate of a parallel flow flat-plate solar collector is numerically analyzed. The governing differential equations wit
Small runoff, large sediment load, and incompatible relationship of flow and sediment load are very important characteristics of the Yellow River. They are also
The energy loss, produced by shielding effect of steel cage outside the source tube, is quite considerable.With PENELOPE software package, MC results have been
The cloning and identification of frc gene from Oxalobacter formigenes in the intestines of Chinese people were conducted. The genomic DNA of Oxalobacter formig