摘要
很多系统对频率合成器的频率捷变性能和相位噪声特性提出了越来越高的要求。介绍了基于锁相环ADF4350与DDSAD9913的跳频频率合成器的设计与实现方法。通过对跳频理论与锁相环技术理论研究，以及对ADF4350锁相环内部结构进行分析，设计了基于ADF4350与AD9913的900—4000MHz跳频频率合成器。测试结果表明，输出信号相位噪声优于-86dBe／Hz@10kHz，频率步进0．76Hz，频率转换时间优于175μs，频率合成器性能良好。
Many systems require that the frequency synthesizer provide high performance in frequency agility and low phase noise characteristics.A design and implementation of frequency hopping synthesizer based on ADF4350 and AD9913 is presented. Based on studying the theory of frequency hopping and phase locked loop,and analyzing the internal structure of ADF4350,a design of frequency hopping synthesizer ranging from 900 MHz to 4 000 MHz is realized combing with AD9913.Testing results show that the phase noise is lower than -86 dBc/Hz@ 10 kHz,frequency hopping step is 0.76 Hz,and frequency conversion time is 175 μs,which provides a good performance and meets the requirement.
出处
《无线电工程》
2015年第9期65-67,共3页
Radio Engineering
关键词
频率合成
直接数字频率合成
锁相环
跳频
frequency synthesis
direct digital frequency synthesis
phase locked loop
frequency hopping
作者简介
胡丽格 女，（1975-），高级工程师。主要研究方向：卫星通信、频率合成。
