公开(公告)号：US20040057496A1

公开(公告)日：2004-03-25

申请号：US10253207

申请日：2002-09-23

Applicant: RAYTHEON COMPANY

Inventor： Robert S. Roeder

IPC: G01J005/00 ,  G01K001/16

CPC classification number: G01K15/00 ,  G01K11/006

Abstract: Apparatus and a method for radiometric temperature measurement comprises a radiometer receiver coupled to an antenna/calibration switch that has coupled thereto a brightness temperature signal. A driver coupled to the antenna/calibration switch controls the operation of the switch between an antenna mode and a calibration mode. An adjustable cold/warm noise source is coupled to the antenna/calibration switch to provide a calibration radiation temperature applied through the antenna/calibration switch in the calibration mode to the radiometer receiver. An output of the radiometer receiver is coupled to the adjustable cold/warm noise source and is adjusted in accordance with the output of the radiometer receiver for a null comparison measurement. Also coupled between the output of the radiometer receiver and the antenna/calibration switch is a mode selector switch that operates to a mode one position to couple the output of the radiometer receiver to the adjustable cold/warm noise source. A bias source is also coupled to the mode selector switch and actuation of the mode selector switch into a mode two position couples the bias source to the adjustable cold/warm noise source.

Abstract translation: 用于辐射测量温度测量的装置和方法包括耦合到天线/校准开关的辐射计接收器，其将亮度温度信号耦合到天线/校准开关。 耦合到天线/校准开关的驱动器控制天线模式和校准模式之间的开关的操作。 可调节的冷/暖噪声源耦合到天线/校准开关，以在校准模式中向辐射计接收器提供通过天线/校准开关施加的校准辐射温度。 辐射计接收器的输出耦合到可调冷/暖噪声源，并且根据用于空比较测量的辐射计接收器的输出进行调节。 还耦合在辐射计接收器的输出和天线/校准开关之间的是模式选择器开关，其操作到模式一个位置以将辐射计接收器的输出耦合到可调节的冷/暖噪声源。 偏置源还耦合到模式选择器开关并且模式选择器开关的致动进入模式两个位置将偏置源耦合到可调节的冷/暖噪声源。