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Microwave radio-frequency front end noise measuring device and measuring method

A microwave radio frequency and noise measurement technology, which is applied in the direction of measuring devices, noise figure or signal-to-noise ratio measurement, and electrical variable measurement. Show intuitive effects

Active Publication Date: 2016-08-10
NAT SPACE SCI CENT CAS
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the existing microwave radio frequency front-end noise measurement device and measurement method such as limited application range and complicated test process, thereby providing a noise measurement device and measurement method with a wide application range and easy operation

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  • Microwave radio-frequency front end noise measuring device and measuring method
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  • Microwave radio-frequency front end noise measuring device and measuring method

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Embodiment Construction

[0030] The present invention will be further described now in conjunction with accompanying drawing.

[0031] figure 1 It is a structural schematic diagram of a noise measuring device for a microwave radio frequency front end of the present invention. As shown in the figure, the noise measurement device includes a feed source, a calibration source, a broadband power spectrum analysis unit, and a computer real-time display unit; wherein, the feed source is used to receive microwave radiation signals from the atmosphere and the calibration source, and its The received microwave radiation signal is input into the measured microwave radio frequency front-end, and the microwave radio frequency front-end performs low-noise amplification and down-conversion on the microwave radiation signal to generate an intermediate frequency signal; the intermediate frequency signal is input into the broadband power spectrum analysis unit, and the The broadband power spectrum analysis unit perfor...

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Abstract

The invention relates to a microwave radio-frequency front end noise measuring device comprising a feed source, a calibration source, a broadband power spectrum analysis unit, and a computer real-time display unit. The feed source is used for receiving microwave radiation signals from atmosphere and the calibration source, the received microwave radiation signals are input to a measured microwave radio-frequency front end, and the microwave radio-frequency front end carries out low-noise amplification and down-conversion of the microwave radiation signals to generate intermediate-frequency signals; the intermediate-frequency signals are input to the broadband power spectrum analysis unit, and the broadband power spectrum analysis unit carries out data acquisition and spectrum analysis on the intermediate-frequency signals to get the power spectrum, noise temperature and noise coefficient of the measured microwave radio-frequency front end; and the results are displayed in real time by the computer real-time display unit.

Description

technical field [0001] The invention relates to the field of noise measurement, in particular to a noise measurement device and a measurement method for a microwave radio frequency front end. Background technique [0002] The noise figure of the microwave radiometer receiver is mainly determined by the noise figure of the front-end of the network (that is, the microwave RF front-end). The smaller the noise figure of the microwave RF front-end and the higher the power gain, the smaller the noise figure of the cascaded network. Therefore The accurate measurement of the noise figure of the microwave RF front-end is an important index to measure the performance of the microwave receiver system. [0003] Since the microwave radio frequency front end of the microwave radiometer is the network front stage of the microwave receiver, there is no intermediate frequency amplification and detection device, so the noise figure and noise temperature cannot be measured by measuring the det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/26G01R35/00
Inventor 张升伟张瑜王新彪封天
Owner NAT SPACE SCI CENT CAS
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