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Detecting and avoiding odd-mode parametric oscillations in microwave power amplifiers

机译:检测并避免微波功率放大器中的奇模参量振荡

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摘要

Multistage power amplifiers are prone to parametric oscillations of an oddmode nature. In this article, a technique for detecting and avoiding odd-mode parametric oscillations in microwave power amplifiers under large-signal excitations is extended and improved. For that, two monolithic amplifiers, having different topology and different oscillation mode, are extensively analyzed. A previously analyzed X-band two-stage power amplifier is used as a first example. Then, the technique is applied to a novel L-band one-stage power amplifier exhibiting a different oscillation mode. The success in determining the oscillation nature of these two different examples and the strategies used for their stabilization clearly illustrate the potential of this technique to address the complex problem of parametric oscillations in microwave amplifiers. (c) 2005 Wiley Periodicals, Inc.
机译:多级功率放大器易于出现奇模性质的参数振荡。本文扩展并改进了一种在大信号激励下检测和避免微波功率放大器中的奇模参量振荡的技术。为此,广泛地分析了具有不同拓扑和不同振荡模式的两个单片放大器。先前分析的X波段两级功率放大器用作第一个示例。然后,该技术被应用于表现出不同振荡模式的新型L波段一级功率放大器。确定这两个不同示例的振荡性质的成功方法及其稳定化策略清楚地说明了该技术解决微波放大器中参数振荡这一复杂问题的潜力。 (c)2005年Wiley Periodicals,Inc.

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