C波段宽带下变频型锁相高速跳频合成器  

C band wideband and high speed frequency hopping frequency synthesizer

作　　者：谢迟[1] 倪文飞[1] 毛飞[1] XIE Chi;NI Wenfei;MAO Fei(Anhui SunCreate Electronic Co.,Ltd.,Hefei Anhui 230000,China)

机构地区：[1]安徽四创电子股份有限公司,安徽合肥230000

出　　处：《太赫兹科学与电子信息学报》2020年第3期427-431,共5页Journal of Terahertz Science and Electronic Information Technology

摘　　要：介绍了一种C波段宽带下变频型锁相高速跳频合成器,主要用于雷达及通信领域。该频率合成器采用锁相环(PLL)与外插电路组合的方式,将较高的输出频率迁移到较低频率后送至鉴相器,大大降低N分频器的工作频率,提高了频率合成器的最高输出频率,且输出频率间隔不变,解决了提高合成器输出频率和不降低频率分辨率的矛盾,实现低相位噪声输出。测试结果表明,输出频率4460 MHz时,在频偏10 kHz处相位噪声为-123 dBc/Hz。采用可控输出的稳压芯片给HMC704LP4供电,通过控制电源的通断,保证HMC704LP4进入正确的工作模式,有效解决了HMC704LP4上电模式选择错误造成的失锁问题。A C-band wideband and high speed frequency hopping source with low noise is presented.In order to improve the phase noise performance,the source contains single Phase Locked Loop(PLL)and down conversion circuit.The high frequency output moves to low frequency,which makes the working frequency of N divider reduced greatly,meanwhile the maximum output frequency of the frequency synthesizer is improved,and the frequency outputs at the same interval.This solves the contradiction of high frequency and low frequency interval,and realizes the output with low phase noise.The tests show that the phase noise is-123 dBc/Hz@10 kHz under output frequency of 4460 MHz.The design uses controlled low dropout linear regulator as power supply for HMC704LP4 to avoid error mode selection.It effectively solve the unlock problem when powering up HMC704LP4 caused by error mode selection.

关 键 词：频率合成 宽带 相位噪声 HMC704LP4芯片 

分 类 号：TN743[电子电信—电路与系统]