X 波段捷变频频率综合器

在无线通信领域中, 高性能频率综合器是通信设备、雷达、电子侦察和对抗设备、精密测量仪器的核心部件。现代通信系统对频率综合器的精度、分辨率、转换时间及频谱纯度等提出了越来越高的要求, 性能卓越的频率综合器均通过频率合成技术来实现。以往通过锁相环来实现的频率综合器具有高精度、高稳定度、低相位噪声、低杂散等性能。但是在跳频时间上只能做到几十甚至上百μS。这与某些雷达需要的频率综合器的捷变速度有差距。本文提出一种直接合成方法，很好的解决了这个问题。

X-band Fast Frequency Hopping Synthesizer

In the field of wireless communication, high performance frequency synthesizer is communications equipment, radar,electronic reconnaissance and countermeasure equipment, precision measuring instruments of the core components.Moderncommunication system of frequency synthesizer of accuracy, resolution, the conversion time and spectral purity raised tallerand taller requirement, high performance frequency synthesizer through frequency synthesis technology.The past through thePLL to realize the frequency synthesizer with high precision, high stability, low phase noise, low spurious performance, but inthe hopping time can do tens or even hundreds of us.The radar frequency synthesizer with certain need agile speed difference.This paper presents a direct synthesis method, a good solution to the problem.