摘要
宇宙背景辐射的研究对我们了解宇宙大爆炸具有重要的意义,研究背景辐射,需要了解矩形喇叭天线的测量结果,首先介绍微波辐射计中用于标定天线温度的口面定标法和口面定标方程。利用口面定标方程对天线温度进行反演,计算天线总的噪声温度。接着介绍影响天线噪声温度的各种噪声源,主要考虑到内部噪声源和外部噪声源,并对影响天线温度的各种噪声源进行具体分析。最后结合分析得出的数据与矩形喇叭天线的原有的测量数据进行比较来研究背景辐射。
The study of Cosmic background radiation has great significance of the Big Bang.To study the background radiation,need to understand the measurements of the rectangular horn antenna.The aperture-calibration method and aperture-calibration equation for the calibration of the antenna temperature is described in this paper.Using aperture-calibration method to calculate the temperature of antenna.Various of noise sources are introduced and analyzed.Mainly taking about the internal noise sources and external noise sources.Combining the datas which analyzed with the datas measured of the rectangular horn antenna were compared.
出处
《电子测量技术》
2010年第10期33-35,共3页
Electronic Measurement Technology
关键词
口面定标
参考噪声源
天线温度
辐射计
aperture-calibration
reference noise source
antenna temperature
radiometer
