Noise behavior of microwave amplifiers operating under nonlinear conditions
Noise behavior of microwave amplifiers operating under nonlinear conditions
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非线性条件下运行的微波放大器的噪声行为
DOI：
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发表时间：
2005
影响因子：
4.3
通讯作者：
J. Graffeuil
中科院分区：
文献类型：
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作者：
L. Escotte;E. Gonneau;C. Chambon;J. Graffeuil
本文研究了大信号条件下运行的微波放大器的噪声行为。高斯噪声被添加到微波信号中，并将它们施加到多个放大设备的输入端。实验数据表明，当器件输入端的微波信号功率由于放大器的压缩而增加时，输出噪声谱密度会降低。简化的理论模型还证明了由于信号及其谐波与噪声相互作用而产生的失真分量。还研究了信号和噪声的统计特性，以验证非线性电路输出端噪声的高斯性。我们还观察到，大多数被测设备的附加噪声与输入功率电平之间存在一些变化。
The noise behavior of microwave amplifiers operating under a large-signal condition has been studied in this paper. A Gaussian noise is added to a microwave signal and they are applied at the input of several amplifying devices. Experimental data show a decrease of the output noise spectral density when the power of the microwave signal at the input of the devices increases due to the compression of the amplifiers. A distortion component due to the interaction of the signal and its harmonics with the noise is also demonstrated from a simplified theoretical model. The statistical properties of the signal and the noise have also been investigated in order to verify the Gaussianity of the noise at the output of the nonlinear circuits. We have also observed that the majority of the measured devices show some variations of their additive noise versus the input power level.