基于DDS激励PLL方式的Ku波段频率源  

Ku Band Frequency Source by Using DDS Driving PLL

作　　者：刘宗是 何宗锐[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都611731

出　　处：《电子质量》2014年第8期93-96,共4页Electronics Quality

摘　　要：采用Ku波段压控整荡器（VCO）HMC632，结合直接数字式频率合成器（DDS）AD9850、鉴相器ADF4107和运算放大器ADS20设计了一款基于DDS激励PLL方式的Ku波段频率源。测试结果表明，该频率源在输出频率范围为15～15．5GHz，跳频时间间隔为20μs时的锁定时间为2μs，杂散小于一60dBc，相位噪声小于-70dBc／Hz@10kHz，输出功率大于7dBm。设计思路简洁，电路结构简单。Based on Ku band Voltage-controlled Oscillator HMC632,combined with Direct Digital Synthesizer AD9850,Phasedetector ADF4107 and Operational amplifier AD820,designed a Ku band frequency source by using DDS driving PLLThe physical test showed that in 15 - 15.5GHz frequency range,when the frequency hopping time interval is 20 p s,the lock time is 2 p s,the system realized the spurious to be smaller than -60dBc, the phase noise to be smaller than -70dBc/Hz@10kHz,and the output power to be greater than 7dBm.Concise design thought,circuit structure is simple.

关 键 词：频率合成 DDS PLL 快速锁定 

分 类 号：TN74[电子电信—电路与系统]