小型化高平坦度窄步进梳状谱源研究  

Research on Miniaturization Comb Spectrum Source With High Flatness and Narrow Stepping

作　　者：舒安刚 秦巍巍 

机构地区：[1]电子科技大学微电子与固体电子学院,四川成都610054

出　　处：《电子科技》2014年第12期134-136,141,共4页Electronic Science and Technology

摘　　要：设计实现了一种高平坦度、窄步进、低成本的高效梳状谱频率源。该频率源采用高速数字计数器产生脉冲信号的技术,可实现从10 k Hz^300 MHz的频率范围梳状谱,该梳状谱源弥补了传统模拟阶跃二极管低频段效率低、平坦度差的不足。如特征指标步进500 k Hz,20 MHz带宽内平坦度为1.8 d B。An efficient comb spectrum source with high flatness, narrow stepping and low cost is designed in this paper. The frequency source adopts high speed digital counter to produce pulse signal, with comb spectrum from 10 kHz to 300 MHz achieved. The comb spectrum source compensates the disadvantages of traditional SRD （ Step Recovery Diode） of low efficiency and poor flatness at low frequencies, such as characteristic indexes step of 500 kHz, and a flatness of 1.8 dB within 20 MHz bandwidth.

关 键 词：梳状波发生器 周期方波信号 傅里叶变换 计数器 

分 类 号：TN911.7[电子电信—通信与信息系统]