基于锁相环原理的X波段频率源的设计与实现

Design of X-band Frequency Synthesizer Based on PLL

介绍了一种X波段频率源的设计方法。该文采用2个数字锁相频率合成单环,再环外混频的方法实现了该X波段频率源的设计。该频率源具有相位噪声低,杂散低,频率稳定度高等特点。经试验测试结果表明,该频率源的相位噪声为-94.3dBc@1kHz,-99dBc@10kHz;输出功率大于13dBm,实现了一个性能较好的频率源。

A design method of the X-band frequency source is introduced in this paper. The synthesizer contains two single-loop digital PLL frequency synthesizers, and then mixes them to achieve the X-band frequency source, which has lots of characteristics, such as low phase noise, low suprs,and high frequency stability. The test results show that： the phase noise of the frequency source is：-94.3 dBc@1 kHz,-99 dBc@10 kHz; the power level of the output greater than 13 dBm,a good performance frequency source is realized.