Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Real-time monitoring microwave dicke radiometer based on reference load temperature

A real-time monitoring and radiometer technology, applied in the fields of microwave remote sensing and precision measurement, can solve the problems of limiting the measurement accuracy of microwave Dicke radiometers, and achieve the effect of simplifying the structure and improving the measurement accuracy

Inactive Publication Date: 2012-09-19
HUAZHONG UNIV OF SCI & TECH
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, under long-term and harsh working conditions, it is very difficult to make the temperature change of the reference load less than 0.1 degrees through constant temperature technology, which limits the measurement accuracy of the microwave Dicke radiometer

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Real-time monitoring microwave dicke radiometer based on reference load temperature
  • Real-time monitoring microwave dicke radiometer based on reference load temperature
  • Real-time monitoring microwave dicke radiometer based on reference load temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0014] see figure 1 and figure 2 , since the microwave radiometer is a linear system, two known brightness temperatures T a1 and T a2 , and measure the radiometer output voltage V a1 and V a2来对 The radiometer is calibrated, and finally the calibration equation is obtained as:

[0015] T a = T a 1 - T a 2 V a 1 - V a 2 ( V a ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a real-time monitoring microwave dicke radiometer based on a reference load temperature and belongs to the field of microwave passive remote sensing. The radiometer comprises a dicke input switch, wherein a first end of the dicke input switch is sequentially connected with a radio frequency and intermediate frequency amplifying circuit, a square law detector, a low frequency amplifier, a synchronous detector, a low pass filter and a data collecting and processing module, a second end of the dicke input switch is switched between a reference load and an antenna under the driving of a switch signal generator, and a temperature measuring circuit is arranged on the reference load and connected with the data collecting and processing module. The reference load of the microwave dicke radiometer is not required to be kept in a constant temperature state, only the temperature measuring circuit is used for monitoring the temperature changes of the reference load in real time, the monitored variable quantity of the temperature of the reference load is plugged into a radiometer scaling equation for modification, and an antenna temperature of the measured scene is obtained. According to the real-time monitoring microwave dicke radiometer based on the reference load temperature, the measuring accuracy is improved and the structure of the existing microwave dicke radiometers is simplified.

Description

technical field [0001] The invention belongs to the technical field of microwave remote sensing and precision measurement, in particular to a microwave Dicke radiometer based on real-time monitoring of reference load temperature. Background technique [0002] Microwave radiometer is the core equipment of passive microwave remote sensing, and it is a tool for detecting, imaging and judging the microwave radiation characteristics of ground objects and targets. All objects above absolute zero radiate electromagnetic wave signals. In the microwave frequency band, the microwave signals radiated by objects themselves are incoherent and extremely weak signals. Therefore, unlike traditional receivers that receive coherent signals and whose signal-to-noise ratio is always greater than 1, microwave What the radiometer receives is the noise power radiated by various objects that is much smaller than the noise power of the machine. It is essentially a high-sensitivity receiver in the mi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01R29/08H04B1/10
Inventor 郎量贺林峰李青侠桂良启陈柯郭伟张祖荫
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com