An unmanned helicopter-borne electromagnetic active calibration device, system and method

Abstract

The present invention relates to an unmanned helicopter-borne electromagnetic active calibration device, system and method. The active calibration device includes a transceiver antenna combination, a transceiver modulation combination, a radio frequency delay combination, a power amplification combination and an equipment control combination, wherein, The transceiver antenna combination is used to realize the directional reception and directional forwarding of the radio frequency signal; the transceiver modulation combination is used to adjust the amplitude and phase of the directional received radio frequency signal; the radio frequency delay combination is used to delay the RF signal after the amplitude and phase adjustment ; The power amplification combination is used to amplify the power of the radio frequency signal after delay processing; the equipment control combination is used to generate and send corresponding work instructions according to external input instructions, and collect corresponding feedback information. The invention can realize quick on-site calibration of electromagnetic scattering characteristic measuring radar, has high calibration precision and wide application range.

Description

technical field [0001] The invention relates to the technical field of radar measurement, in particular to an unmanned helicopter-borne electromagnetic active calibration device, system and method. Background technique [0002] When carrying out the measurement of electromagnetic scattering characteristics, there are two ways of passive calibration and active calibration. Passive calibration usually raises the calibration body or uses balloons to lift it into the air. On the one hand, the height of the calibration body and the balloon launch have high requirements on the environment, and the actual operation in the field is difficult; on the other hand, the support and balloons The echo of the object will enter the measurement radar together with the echo of the calibration body, which will affect the calibration accuracy. The active calibration methods developed in recent years are mostly placed on the ground or elevated. If the working environment is not open enough, elec...

AI Technical Summary

Problems solved by technology

Passive calibration usually raises the calibration body or uses a balloon to lift it into the air. On the one hand, the height of the calibration body and the balloon launch have high environmental requirements, and the actual operation in the field is difficult; on the other hand, the bracket and balloon The echo of the object will enter the measurement radar together with the echo of the calibration body, which will affect the calibration accuracy

The active calibration methods developed in recent years are mostly placed on the ground or elevated. If the working environment is not open enough, electromagnetic wave transmission is blocked or multipath effects are formed, the calibration accuracy will still be affected.

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