摘要
为了实现一种适用于C波段和X波段的宽带射频源,利用锁相环频率合成原理,构建了射频源的实现方案,介绍了频率合成芯片HMC983/984,设计了所需的宽带微带定向耦合器,并对环路滤波器进行了设计,解析了射频源功率和频率分辨率的设计过程,说明了软件控制、滤波电路、电源设计和参考输入/反馈输入功率设计中的注意事项,并最终完成了5~10GHz的射频源的设计。实验表明,输出信号的频率误差小于±0.001%,功率平坦度在±2.0dB以内,达到了预期的设计指标。
In order to realize a wide-band RF source for c-band and x-band,an implement scheme of RF source was constructed based on the theory of PLL synthesizer.After introducing the synthesizer chips HMC983/984 and designing a wide-band microstrip directional coupler needed in scheme,the parameters of LPF from simulation soft were obtained.By analyzing the design process of power and frequency resolution of RF source,the demands of soft control,filtering circuits,power supply design,input power of reference and feedback were mentioned,finally the design of the 5~10GHz RF source was completed.The experiment revealed that the frequency error of the output signal was less than 0.001%,and the power flatness was not more than 4dB,so the design achieved the expected specifications.
出处
《电子测量技术》
2016年第4期18-22,共5页
Electronic Measurement Technology
关键词
锁相环
频率合成
定向耦合器
phase loop lock（PLL）
synthesizer
directional coupler
