X波段低噪声砷化镓埸效应管振荡器的大信号设计与实现

• 作 者: 潘瑞成
• 出 处: 现代雷达
• 发表日期: 1982年03期
• 关键词: 振荡器 噪声 调频噪声 砷化镓 场效应管 有源器件 信号设计 空间通信 中等功率 振荡器输出

砷化镓场效应管振荡器的输出主要在相位上不稳定,而这种不稳定性是由有源器件的噪声引起的。因为砷化镓场效应管呈现过量噪声,其重要后果是振荡器也呈现一种1/f调频噪声谱,这对当今空间通信或多卜勒雷达应用是一重大限制。本文探讨有源器件的低频过量噪声以及嵌入网络对整个调频噪声的影响。

The gallium arsenide FET oscillator output is mainly unstable in phase, and this instability is caused by the noise of active devices. Because gallium arsenide FETs exhibit excessive noise, an important consequence of this is that oscillators also exhibit a 1 / f FM noise spectrum, which is a significant limitation for today’s space communications or Doppler radar applications. This article explores the low frequency excess of active devices and the impact of embedded networks on the overall FM noise.