摘要
提出了一种基于直接数字频率合成(DDS)与锁相环(PLL)相结合的X波段线性调频信号源设计方案。设计高性能的锁相环本振源,将DDS产生的低频线性调频(LFM)信号经二次变频搬移到X波段。实物测试结果表明该方案很好地满足了对X波段线性调频信号源的要求。
A X-band frequency synthesizer scheme for linear frequency modulation(LFM)signal source combining direct digital synthesis(DDS)and phase-locked loop(PLL)is proposed in this paper.The high performance local oscillator is designed and low LFM signal produced by DDS is converted into X band by double conversion.The test results show that the proposed scheme meets the demands of chirp signal.
作者
许友坤
胡天涛
刘宾
XU You-kun;HU Tian-tao;LIU Bin(Guizhou Aerospace Institute of Measuring and Testing Technology,Guiyang 550009,China)
出处
《微波学报》
CSCD
北大核心
2020年第S01期203-205,共3页
Journal of Microwaves
关键词
DDS
PLL
二次变频
线性调频
DDS
PLL
double conversion
linear frequency modulation
