Height-finding radar calibration system

A radar calibration and radar technology, which is applied in the field of radar, can solve the problems of phase calibration of altimetry radar that cannot use dual antennas, and achieve the effect of improving measurement resolution, high precision and accurate calculation of phase difference

Pending Publication Date: 2021-11-26
SHANGHAI RADIO EQUIP RES INST
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  • Claims
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Problems solved by technology

However, the above-mentioned products are all single-channel SAR systems, and their internal calibration systems are based on a single-channel design, which is also aimed at the phase calibration of the single-channel receiving link and transmitting link, and cannot be used for phase calibration of altimetry radars with dual antennas

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Embodiment Construction

[0053] The altimetry radar calibration system proposed by the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and all use imprecise scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. In order to make the objects, features and advantages of the present invention more comprehensible, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. ...

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Abstract

The invention discloses a height-finding radar calibration system, which is applied to a double-antenna height-finding radar, and the double-antenna height-finding radar comprises a radio frequency receiving and transmitting module, a signal adjustment module connected with the radio frequency receiving and transmitting module, and a double-channel antenna connected with the signal adjustment module. The system comprises a phase calibration module which is respectively connected with a radio frequency transceiver module and a dual-channel antenna and is used for carrying out phase calibration on a transmitting link and a receiving link formed by the radio frequency transceiver module, a signal adjusting module and the dual-channel antenna so as to obtain a calibration echo signal; and a signal processing platform which is respectively connected with the phase calibration module and the signal adjusting module and is used for obtaining the phase difference between the transmitting link and the receiving link according to the calibration echo signal so as to carry out phase compensation on the signal in the transmitting link and the signal received by the receiving link. According to the invention, phase calibration and compensation of the transmitting link and the receiving link of the double-antenna height-finding radar are realized, and the measurement resolution and the height measurement precision of the double-antenna height-finding radar can be improved.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to an altimetry radar calibration system applied to a dual-antenna altimetry radar. Background technique [0002] According to the demand for high-precision measurement of ground height, an altimetry radar with dual antennas can be used to extract ground height. The dual-antenna altimetry radar can increase the power gain product to meet the requirements of the operating distance, and can also use narrow beams and interferometry to improve measurement resolution and high precision. [0003] In the working process of the dual-antenna altimetry radar, the spatial transmission paths of different target echoes to the two antennas are different, and different targets can be distinguished according to the phase difference between the echo signals of the two receiving channels. However, in addition to the phase difference caused by different spatial transmission paths, additional phase dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 刘亚奇付朝伟苏皎阳倪亮张金强魏维伟王海涛陈潜
Owner SHANGHAI RADIO EQUIP RES INST
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