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Active transponder for broadband

A repeater and broadband technology, applied in the field of microwave remote sensing, can solve the problems of inability to provide RCS, the size limitation of passive corner reflectors, and the reduction of radiation calibration accuracy, so as to suppress background clutter interference, maintain system gain stability, improve Effects of Radiometric Calibration Accuracy

Active Publication Date: 2014-09-17
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous improvement of SAR resolution, passive corner reflectors are limited by size and cannot provide a large enough RCS
In addition, the background clutter of the calibration field is easily mixed into the calibration signal, which greatly reduces the accuracy of radiometric calibration.

Method used

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  • Active transponder for broadband
  • Active transponder for broadband
  • Active transponder for broadband

Examples

Experimental program
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Effect test

Embodiment Construction

[0040] The broadband active transponder of the present invention has a structural block diagram such as figure 1 As shown, the structural principle block diagram is as figure 2 Shown. figure 1 Including: transceiver unit 1, control unit 2. The monitoring interface of the transceiver unit 1 is connected to the monitoring interface of the control unit 2 through a monitoring cable; the power supply interface of the transceiver unit 1 is connected to the power supply interface of the control unit 2 through a power supply cable. The main function of the transceiver unit 1 is to filter, amplify, delay and modulate the signal, and then forward the signal to the radar, and at the same time to couple, detect and sample the signal; the main function of the control unit 2 is to control the working parameters of the transceiver unit Control, monitor the working status of the transceiver unit, receive and record the sampling data sent by the transceiver unit.

[0041] The structural principl...

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Abstract

The invention discloses an active transponder for a broadband, and relates to the microwave remote sensing technology. The active transponder comprises a transmitting-receiving unit and a control unit, wherein the transmitting-receiving unit is mainly used for receiving a pulse signal transmitted by a radar, performing filtering, amplifying, delaying, modulating and the like on the signal, transmitting the signal to the radar, and coupling, detecting and sampling the signal simultaneously; the controlling unit is mainly used for controlling working parameters of the transmitting-receiving unit, monitoring the working status of the transmitting-receiving unit, and receiving and recording sampling data transmitted by the transmitting-receiving unit; and the transmitting-receiving unit and the control unit are connected through an electric cable and a monitoring cable. The active transponder for the broadband, disclosed by the invention, is applicable to radiometric calibration of a high-resolution synthetic aperture radar (SAR).

Description

Technical field [0001] The invention relates to the technical field of microwave remote sensing, in particular to a wideband active transponder applied to high-resolution synthetic aperture radar radiation calibration. Background technique [0002] Synthetic Aperture Radar (SAR) is an advanced microwave remote sensing tool. It has all-weather, all-weather, high-resolution, large-area remote sensing imaging capabilities. Its image data has been used in geology, agriculture, hydrology, forestry, oceanography, and cartography. Mapping, military reconnaissance, target recognition and information extraction have played a huge role. Early SAR applications were mainly focused on qualitative remote sensing, that is, it was mainly based on the position, shape, and echo strength provided by SAR images. However, in the study of clutter statistical characteristics, soil moisture measurement, accurate crop classification, sea surface survey, In terms of target recognition and other aspects, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
Inventor 郭俊栋马艳敏李鹏程洪瀑曹舸
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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