radiation receiver

Abstract

The present invention provides a radiation receiver, comprising: an R component and a receiving unit; the R component is used to receive a scene weak thermal noise signal, a load signal and a coherent signal of an internal noise source of equal power, and transmit the scene weak thermal noise The signal, the load signal, and the coherent signal of the internal noise source of equal power are amplified for the first time and then output to the receiving unit; The amplified signal is output to the correlator, and the detected signal is output to the digital integrated processing system. The invention has simple structure, is easy to implement, improves the sensitivity and anti-interference performance of the radiation receiver, has strong versatility, and can be widely used in various radiation systems.

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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