Noise in IMPATT Diode Amplifiers and Oscillators
Noise in IMPATT Diode Amplifiers and Oscillators
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IMPATT 二极管放大器和振荡器中的噪声
DOI：
10.1109/tmtt.1971.1127611
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发表时间：
1971
期刊：
影响因子：
--
通讯作者：
G. Weidmann
中科院分区：
文献类型：
--
作者：
H. Thaler;G. Ulrich;G. Weidmann
本文介绍了对IMPATT二极管放大器和振荡器噪声特性的实验和理论研究结果。振荡器的噪声是由三个不同的贡献：调制噪声，选择性放大的主要噪声，和转换噪声。详细讨论了有源器件非线性和负载电路参数对系统的影响。实验结果与理论预测吻合较好。特别指出，AM和FM波动之间的大的相关性，通常在IMPATT振荡器中测量，表明非最佳AM噪声性能。实现最佳AM噪声性能的实验技术证明（正交噪声调谐）。通过对该模型的简单扩展，可以描述注入锁相振荡器的噪声特性。同步振荡器的AM和FM噪声功率谱的计算结果也与实验结果吻合得很好。最后，研究了电流调制雪崩管振荡器的信噪比，并论证了优化方法。
The results of experimental and theoretical investigations of the noise characteristics of lMPATT diode amplifiers and oscillators are presented. The oscillator noise is shown to consist of three different contributions: modulation noise, selectively amplified primary noise, and conversion noise. The influence of the active device nonlinearity and load circuit parameters is discussed in detail. The experimental results are in good agreement with the theoretical predictions. It is especially pointed out that the large correlation between AM and FM fluctuations, usually measured in IMPATT oscillators, indicates nonoptimum AM noise performance. Experimental techniques for achieving optimum AM noise performance are demonstrated (orthogonal noise tuning). By a simple extension of the model, the noise behavior of an injection phase-locked oscillator can be described. The calculated AM and FM noise power spectra for the synchronized oscillator are also shown to be in good agreement with experimental results. Finally the signal-to-noise ratio for current modulated IMPATT oscillators is investigated and optimization is demonstrated.