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Satellite-borne terahertz radiometer receiver

A terahertz radiation and receiver technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as high linearity and sensitivity at the same time, to reduce the difficulty of local oscillator design, ensure noise figure, good detection sensitivity and The effect of linearity

Pending Publication Date: 2019-10-15
SHANGHAI AEROSPACE COMP TECH INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a spaceborne terahertz radiometer receiver to solve the problem that the existing radiometer receivers in the terahertz frequency band are difficult to meet the requirements of high linearity and sensitivity at the same time

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Embodiment Construction

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the accompanying drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all examples. Based on the present invention All other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] In order to facilitate the understanding of the embodiments of the present invention, specific embodiments will be taken as examples for further explanation below in conjunction with the accompanying drawings, and each embodiment does not constitute a limitation to the embodiments of the present invention.

[0029] refer to figure 1 As shown, a spaceborne terahertz radiometer receiver provided in this embodiment includes: a sequentially coupled mixer 1, a low noise amplifier...

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Abstract

The invention provides a satellite-borne terahertz radiometer receiver; the satellite-borne terahertz radiometer receiver comprises a frequency mixer, a low-noise amplifier, an electrically controlledattenuator, an intermediate frequency amplifier, a filter, a detector, a direct-current amplifier and a low-pass filter which are sequentially coupled, wherein the frequency mixer is used for receiving a noise signal and carrying out down-conversion; the low-noise amplifier is used for amplifying a received low noise of an intermediate-frequency link; the electrically controlled attenuator is used for adjusting the gain of a receiver chain; the intermediate frequency amplifier is used for amplifying the amplitude of the intermediate frequency signal; the filter is used for controlling the noise bandwidth in the channel of the receiver; the detector is used for detecting the power of the channel of the receiver; the direct-current amplifier is used for conducting direct-current amplification on a detection voltage; and the low-pass filter is used for filtering out noise components in the direct-current voltage. The satellite-borne terahertz radiometer receiver can achieve relatively high sensitivity and linearity, and meanwhile, the satellite-borne terahertz radiometer receiver has high stability.

Description

technical field [0001] The invention relates to the technical field of microwave receivers, in particular to a spaceborne terahertz radiometer receiver. Background technique [0002] The radiometer works by receiving the microwave radiation signal of the object under test. It is generally composed of an antenna system, a receiver and a data processing system. The processing system performs processing, and finally outputs the target brightness temperature signal (generally a DC voltage signal, and the DC voltage has a linear relationship with the target brightness temperature). The working principle of the radiometer is mainly based on Planck's black body radiation law, and its receiver is a high-sensitivity receiver, which has strict requirements on noise figure and receiver gain stability. High linearity. [0003] With the continuous development of the satellite field, the operating frequency of its radiometer is getting higher and higher, and it has exceeded 200GHz at pr...

Claims

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Application Information

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IPC IPC(8): G01S7/285
CPCG01S7/285
Inventor 王文伟刘婧查晓晨陈卫英张喆邢瑞先戴善江
Owner SHANGHAI AEROSPACE COMP TECH INST
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