Chirp变换频谱分析仪的设计及其数字部分的实现  

Design of Chirp Transform Spectrum Analyzer and Realization of Its Digital Part

作　　者：周海松 马骊群[1] 刘梦伟[2] 宫俊杰[2] ZHOU Haisong;MA Liqun;LIU Mengwei;GONG Junjie(Changcheng Institute of Metrology&Measurement,Beijing 100095,China;The Institute of Acoustics of the Chinese Academy of Sciences,Beijing 100080,China)

机构地区：[1]航空工业北京长城计量测试技术研究所,北京100095 [2]中国科学院声学研究所,北京100080

出　　处：《计测技术》2019年第5期29-36,共8页Metrology & Measurement Technology

基　　金：国家自然科学基金项目(11374327)

摘　　要：太赫兹频谱分析仪应用技术中,Chirp变换频谱分析应用了声表面波滤波器件,能够保障中频、分辨率等参数,满足深空探测领域对稳定性和功耗的严格要求。但目前国内的Chirp变换频谱分析仪只能处理400 MHz带宽的输入信号,不能完全满足应用需要。为了提高带宽,本文围绕1 GHz带宽声表面波滤波器件,利用直接数字频率合成技术产生与其匹配的2 GHz带宽的线性调频信号,设计了带宽为1 GHz,中心频率为3.2 GHz的频谱分析仪,并对数字部分进行了实现和结果分析验证。In the application technology of terahertz spectrum analyzer,Chirp transform spectrum analysis uses surface acoustic wave filter,which can guarantee the parameters such as intermediate frequency and resolution,and meet the strict requirements of stability and power con-sumption in deep space exploration.However,the current Chirp transform spectrum analyzer in China can only process 400 MHz bandwidth input signal,which can not fully meet the application needs.In order to improve the bandwidth,a frequency analyzer with 1 GHz bandwidth and 3.2 GHz center frequency is designed in this paper.The digital part is implemented and the results are analyzed and validated.

关 键 词：太赫兹 频谱分析仪 基于声表面波的Chirp变换 1 GHz带宽 

分 类 号：TB9[一般工业技术—计量学] TN98[机械工程—测试计量技术及仪器]