Radiation receiver

Abstract

The invention provides a radiation receiver. The radiation receiver comprises an R assembly and a receiving unit, wherein the R assembly is used for receiving a scene weak thermal noise signal, a loadsignal and an equal-power internal noise source coherent signal, carrying out first amplification processing on the scene weak thermal noise signal, the load signal and the equal-power internal noisesource coherent signal and then outputting the signals to the receiving unit; and the receiving unit is used for respectively carrying out second amplification processing and detection processing onthe received signals, outputting the signals subjected to the second amplification processing to the correlator and outputting the signals subjected to the detection processing to the digital comprehensive processing system. The radiation receiver is simple in structure, easy to implement, high in universality and capable of being widely applied to various radiation systems, and the sensitivity and the anti-interference performance of the radiation receiver are improved.

Description

technical field [0001] The present invention relates to the field of microwave technology, in particular to a radiation receiver. Background technique [0002] The radiation receiver is the most important component in the microwave radiometer, and its technical indicators can represent the main technical level of the radiometer. A radiation receiver is a high-sensitivity, high-gain receiver used to receive weak signals emitted by radiation sources. In order to achieve high-sensitivity anti-interference, superheterodyne receivers are often used, including RF low-noise amplifiers, local oscillator frequency conversion, intermediate frequency amplification, square rate detection, and low-frequency integration. This structure is complex, large in size, and power-consuming Large, there are many frequency sources and various mixing components. [0003] The function of the radiometer system is enhanced, and there will be more interference signals near the frequency band of the re...

AI Technical Summary

Problems solved by technology

These methods have high requirements on the performance of components, high requirements on isolation between different channels and sideband suppression of filters, extremely high requirements on filter square coefficients, multiple filters are required, and the volume is relatively large. At the same time, it is difficult to achieve the desired effect on interference signals with relatively close frequency points or interference signals with large amplitudes.

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