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Passive receiving link for active and passive joint detection

A receiving link, active and passive technology, applied in the direction of measuring devices, signal transmission systems, instruments, etc., can solve problems such as radiometer interference, burning radiometer links, measurement errors, etc., to achieve the effect of reducing interference and ensuring accuracy

Active Publication Date: 2019-03-26
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When active and passive joint detection is carried out, when the radar transmits at high power, it will cause great interference to the radiometer or even burn the radiometer link, and when the radar is launched, the link shielding protection is carried out, and the integral part of the radiometer will be introduced into the measurement error

Method used

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  • Passive receiving link for active and passive joint detection
  • Passive receiving link for active and passive joint detection
  • Passive receiving link for active and passive joint detection

Examples

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Embodiment Construction

[0027] The invention will be described in more detail hereinafter with reference to the accompanying drawings showing embodiments of the invention. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In these drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.

[0028] as attached Figure 1-2 , the present invention provides a passive receiving link during active and passive joint detection, comprising a radiometer feed source, a radiometer amplification link, and an integral amplification link connected in sequence, the radiometer feed source and the radiometer amplification chain A first parallel group is provided between the roads, and a first single-pole double-throw switch is...

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Abstract

The invention discloses a passive receiving link for active and passive joint detection of adjacent frequency bands. The passive receiving link comprises a radiometer feed source, a cavity filter, a single-pole double-throw switch, a load, a radio frequency amplification link, a square-law detector and an integral amplification link, wherein the radiometer feed source is used for receiving a target radiation noise signal; the cavity filter is used for suppressing the radar emission signals of the adjacent frequency bands; the radio frequency amplification link is used for amplifying the noisesignal so as to meet the input requirement of the square-law detector; and the integral amplification link is used for outputting detection and performing amplified integral output. The passive receiving link can be applied to the active and passive integrated microwave detecting instrument system of terrestrial water resource satellites, and can also be widely applied to various adjacent satellite-borne active and passive joint detection systems.

Description

technical field [0001] The invention belongs to the technical field of aerospace microwave remote sensing radiometers, and relates to a passive receiving link system of an active-passive integrated detector. Background technique [0002] Land Water Resources Satellite aims to fill the gap in my country's comprehensive monitoring of land surface water and soil water, and provide data support for global water cycle monitoring, early warning of floods and droughts in my country, macro-control of water resources, agriculture and forestry monitoring, and disaster prevention and mitigation. Soil moisture is the key to driving the three major circulation systems of global water, carbon and energy. Obtaining high-precision and high-resolution soil moisture products is the core of realizing comprehensive monitoring of land surface water and soil water. [0003] Active microwave remote sensing receives the echo signal reflected by the surface by the radiometer feed source, and obtains...

Claims

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Application Information

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IPC IPC(8): G01C25/00G08C17/02
CPCG08C17/02G01C25/005
Inventor 孙彦龙栾英宏徐红新姚崇斌赵锋李强张鑫裴李丹
Owner SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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