超低PM和AM噪声产生与一组相相一致振荡器
IEEE transactions on ultrasonics, ferroelectrics, and frequency control
|December 13, 2023
概括
这项研究表明,相连贯功率组合振荡器 (PPO) 显著减少相调制 (PM) 和振幅调制 (AM) 噪声. 该方法实现了7.8dB的改进,为信号生成设定了新的低噪声基准.
科学领域:
- 电气工程 电气工程
- 信号处理 信号处理
- 射频和微波工程 射频和微波工程
背景情况:
- 相连贯功率组合振荡器 (PPO) 对于实现低噪声信号生成至关重要.
- 在各种电子系统中,最小化相调制 (PM) 和振幅调制 (AM) 噪声是必不可少的.
- 以前的方法在降噪和相位对齐方面存在局限性.
研究的目的:
- 为了研究六振荡器PPO阵列在减少AM和PM噪声方面的性能.
- 量化通过连贯的功率组合实现的降噪.
- 探索优化相位对齐和最小化转换效应的方法.
主要方法:
- 构建了一个PPO阵列,由六个个别的振荡器模块组成,运行在10 MHz,100 MHz和1 GHz.
- 采用细致的相位调整技术,以实现连贯的功率组合.
- 利用载体抑制噪声测量,并提出了一种新的相位对齐优化方法.
主要成果:
- 在AM和PM噪声的白噪声区域观察到大约7.8dB的改善,与理论预测相匹配 (10log10(k)).
- 实现的单侧带 (SSB) 白相噪声水平为-182 dBc/Hz (10 MHz),191 dBc/Hz (100 MHz) 和-168 dBc/Hz (1 GHz).
- 报告的白色AM噪声水平为191dBc/Hz (10MHz),194dBc/Hz (100MHz) 和-182dBc/Hz (1GHz). 报告中的白色AM噪声水平为191dBc/Hz (10MHz),194dBc/Hz (100MHz) 和-182dBc/Hz (1GHz). 报告中的白色AM噪声水平为191dBc/Hz (10MHz),194dBc/Hz (100MHz) 和-182dBc/Hz (1GHz).
结论:
- 相连贯功率组合为超低噪声信号生成提供了重要的途径.
- 取得的噪声水平是这些频率报告中最低的.
- 有效的相位对齐对于充分实现理论降噪效益和最大限度地减少有害的PM-AM/AM-PM转换至关重要.
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