| 基于Phase-Refining技术的微波宽带频率合成器 |
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| 引用本文： | 李智鹏,王 平,曾 荣,龙 双,鲍景富.基于Phase-Refining技术的微波宽带频率合成器[J].太赫兹科学与电子信息学报,2018,16(4):676-681. |
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| 作者姓名： | 李智鹏 王 平 曾 荣 龙 双 鲍景富 |
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| 作者单位： | Institute of Electronic Engineering，China Academy of Engineering Physics，Mianyang Sichuan 621999，China,Institute of Electronic Engineering，China Academy of Engineering Physics，Mianyang Sichuan 621999，China,Institute of Electronic Engineering，China Academy of Engineering Physics，Mianyang Sichuan 621999，China,Institute of Electronic Engineering，China Academy of Engineering Physics，Mianyang Sichuan 621999，China and School of Electronic Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China |
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| 摘 要： | 为改善宽带频率合成器的相位噪声，提出一种基于Phase-Refining技术的微波宽带频率合成器结构与一种对其相位噪声的准确分析方法。首先，根据线性传递函数与叠加原理得到该频率合成器的相位噪声解析模型，通过对振荡器实测相位噪声谱型进行曲线拟合并带入模型中来准确预测其相位噪声性能。分析表明，在级联偏置锁相环中，整个输出频率范围内都可通过将反馈分频比最小化来改善其环路带宽内的相位噪声。实验结果表明，该频率合成器的输出频率范围为2.1~5.6 GHz，频率步进为1 Hz，当输出为2.1 GHz与5.6 GHz时，在频偏10 kHz处的相位噪声分别为-114.7 dBc/Hz与-108.2 dBc/Hz，其相位噪声测试结果与分析计算结果相吻合。
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| 关 键 词： | 频率合成器 锁相环 相位传递函数 相位噪声 级联偏置 |
| 收稿时间： | 2017/5/3 0:00:00 |
| 修稿时间： | 2017/6/22 0:00:00 |
A wideband frequency synthesizer based on Phase-Refining technology |
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| LI Zhipeng,WANG Ping,ZENG Rong,LONG Shuang and BAO Jingfu.A wideband frequency synthesizer based on Phase-Refining technology[J].Journal of Terahertz Science and Electronic Information Technology,2018,16(4):676-681. |
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| Authors: | LI Zhipeng WANG Ping ZENG Rong LONG Shuang and BAO Jingfu |
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| Abstract: | A wideband frequency synthesizer employing Phase-Refining technology and a method to calculate its phase noise performance accurately are presented. Based on linear transfer function and superposition principle, the analytic phase noise model of synthesizer is obtained. Based on the actual measured spectrum of the oscillator, the curve-fitting method is employed to predict the phase noise performances accurately. It is indicated that the main cascaded-offset Phase-Locked Loop(PLL) can reduce the in-band phase noise by minimizing the feedback divider ratio in the whole frequency range. The output frequency range of the experimental synthesizer is 2.1 GHz to 5.6 GHz with 1 Hz step size, and the measured phase noise are -114.7 dBc/Hz and -108.2 dBc/Hz at 10 kHz offset from carrier of 2.1 GHz and 5.6 GHz, respectively. The predicted and measured phase noise characteristics exhibit good agreement. |
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