对零平衡总功率辐射仪系统NCS1的系统方程的推导
1National Institute of Standards and Technology, Boulder, CO 80303-3328.
概括
这项研究严格推导出一个全功率的零平衡辐射计的系统方程. 该研究将交付的噪声功率与可用功率进行关联,从而能够准确地测量未知来源的噪声温度.
科学领域:
- 放射测量是一种放射测量.
- 微波工程 微波工程
- 计量学 计量学 计量学
背景情况:
- 精确的噪音温度测量对于放射仪系统至关重要.
- 宽带系统在提供和可用的电力之间存在挑战.
- 现有的方法可能无法完全解释复杂系统中的不匹配效应.
研究的目的:
- 为了严格推导出一个新的零平衡,总功率辐射仪的系统方程.
- 将不匹配因子概念扩展到宽带射线计系统.
- 建立一种方法来准确确定未知来源的噪声温度.
主要方法:
- 使用基本噪声原理推导系统方程.
- 扩大宽带应用的不匹配系数.
- 在基本噪声方程中应用级联技术.
- 对噪声标准和未知来源的顺序附加的数学建模.
主要成果:
- 关键参数的定义:可用功率比 (αg),可用增益 (G) 和交付功率比 (η1).
- 基于实验程序开发一个由三个方程组成的系统.
- 衍生系统允许解决未知噪声源的噪声温度.
结论:
- 开发的零平衡,总功率辐射仪系统为噪声温度测量提供了严格的方法.
- 扩展的不匹配因子实际上与宽带系统的交付和可用功率有关.
- 数学模型允许使用标准校准技术准确地描述未知噪声源.
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