一种55~65 MHz频段射电天文天线阵接收机的设计
An Analog Receiver Designing of 55-65MHz Band Radio Astronomy Observation
查看参考文献9篇
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文摘
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30~300 MHz的低频段陆基天线阵是重要的射电观测设备,在该频段进行射电观测面临无线电环境复杂、天空背景温度高等特点。介绍了一种基于微波芯片设计的新型低频段模拟接收机。接收机由初级带通滤波器(30~70 MHz) 、初级放大器、次级带通滤波器(55~ 65 MHz) 、180°移相器、两个次级放大器组成。在测试云南天文台短波段无线电环境的基础上,接收机实现了对55~65 MHz可观测频段的选通和放大,整机噪声约为320 K,增益63 dB左右。同时作为中国射电天文低频阵前期研究的一部分,由于采用单片微波集成电路(Monolithic Microwave Integrated Circuit,MMIC)芯片,接收机具有体积小、成本低、易于量产等特点。 |
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其他语种文摘
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The Ground-based antenna arrays are important radio observation instruments in low(Very High Frequency) band,but in this band,the observations have to face the bad radio environments and the high sky temperature. In this paper,we introduce a new kind of analog receiver working in low band based on the MMIC(Microwave Monolithic Integrated Circuit) chips. This receiver consists of primary band pass filter, primary amplifier,secondary band pass filter,180 degree phase shifter and two secondary primary amplifiers. Based on the radio environment testing results in the Yunnan observation site,this analog receiver achieves band passing and amplifying for the observation band from 55 - 65MHz,and this receiver' s system noise temperature is nearly 320K,the gain is nearly 63dB. At the same time,as a part of the Chinese low frequency band observation net,based on the MMIC technologies,this receiver has smaller volume,lower price and is easy to copy. |
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来源
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天文研究与技术
,2017,14(2):157-163 【核心库】
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关键词
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低频段
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MMIC芯片
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模拟接收机
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地址
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1.
中国科学院云南天文台, 云南天文台信息技术联合实验室, 云南, 昆明, 650011
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云南师范大学物理电子学院, 云南, 昆明, 650092
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云南大学, 云南天文台信息技术联合实验室, 云南, 昆明, 650001
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1672-7673 |
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学科
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天文学 |
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基金
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国家自然科学基金
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云南省应用基础研究计划面上项目
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“西部之光”A类人才计划资助
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文献收藏号
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CSCD:5962227
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参考文献 共
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