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宽带低噪遥感卫星模拟信号频综源技术研究
引用本文:林波涛,杨仁忠,陈志伟,韦宏伟.宽带低噪遥感卫星模拟信号频综源技术研究[J].传感技术学报,2009,22(12).
作者姓名:林波涛  杨仁忠  陈志伟  韦宏伟
作者单位:1. 中国科学院对地观测与数字地球科学中心,北京,100086
2. 中国科学院对地观测与数字地球科学中心,北京,100086;中国科学院研究生院,北京,100049
基金项目:遥感卫星应用国家工程实验室项目资助 
摘    要:介绍了直接频率合成(DDS)的结构和原理;将DDS与杂散抑制技术应用于遥感卫星模拟信号源.在分析DDS谐波杂散信号影响的基础上,通过外部滤波网络和"余弦修正"等技术有效抑制了谐波杂散和噪声;实现了一种基于DDS+FPGA内置式可编程宽带低噪的频综源;实验表明该频综源具有频带宽(1 MHz~400 MHz)、频率分辨率高、切换速度快、相位噪声低等优点,满足通用型遥感卫星数据模拟源系统设计的需求.

关 键 词:直接数字频率合成器  频综源

Research on the Wideband & Low Spurs Remote Sensing Satellites Simulator Frequency Synthesizer
LIN Botao,YANG Renzhong,CHEN Zhiwei,WEI Hongwei.Research on the Wideband & Low Spurs Remote Sensing Satellites Simulator Frequency Synthesizer[J].Journal of Transduction Technology,2009,22(12).
Authors:LIN Botao  YANG Renzhong  CHEN Zhiwei  WEI Hongwei
Affiliation:LIN Botao1,YANG Renzhong1,CHEN Zhiwei1,2,WEI Hongwei1 1.Center for Earth Observation , Digital Earth of Chinese Academy of Sciences,Beijing 100086,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100049
Abstract:The techniques of direct digital synthesizer and harmonic spurs reduction were applied in the system of remote sensing satellites simulator frequency synthesizer.Key technologies and principle of DDS are introduced.Main harmonic spurs of DDS devices are discussed,and the primary means of spurious suppression methods are introduced,which use the techniques of 7th order elliptical differential low-pass filter and cosine correction.The wideband and low spurs frequency synthesizer was designed,which based on FP...
Keywords:AD9912  FPGA  DDS  AD9912  FPGA  frequency synthesizer
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