X波段低相噪频率综合器设计

Design of X band low phase noise frequency synthesizer

摘要:

介绍了一种X波段低相噪频率综合器的实现方法。采用混频环与模拟高次倍频相结合的技术，实现X波段跳频信号的产生。采用该技术实现的频率综合器杂散抑制可达-68 dBc，相噪优于-99 dBc/Hz@1 kHz, -104 dBc/Hz@10 kHz, -106 dBc/Hz@100 kHz。重点论述了所采用的低相噪阶跃倍频的关键技术，详细分析了重要指标及其实现方法，实测结果证明采用该方法可实现给定指标下的X波段低相噪频率综合器。

Abstract:

A method of designing X-band low phase noise frequency synthesizer is proposed. By combining the mixer-Phase Locked Loop(PLL) and the analog of high order multiplier, the hopping signal of X-band is realized. The synthesizer can achieve specifications including spurious-suppress below -68 dBc and phase noise below -99 dBc/Hz@1 kHz, -104 dBc/Hz@10 kHz, -106 dBc/Hz@100 kHz. It emphasizes the key techniques of low phase noise multiplier using step recovery diode, and analyzes the method of implementing specifications. Through the measured results, it is demonstrated that the method can design the X-band low phase noise frequency synthesizer achieving the given specifications.