An airborne two-dimensional active phased array radar antenna calibration device and method

Abstract

The invention discloses an airborne two-dimensional active phased array radar antenna calibration device and method, comprising a two-dimensional active phased array antenna, a receiver, a signal processor and a display controller. Using the hardware architecture of the radar itself, the correction of the amplitude and phase errors of the TR channel of the complex two-dimensional active phased array antenna is realized without additional hardware resources; the automatic correction function is used for airborne SAR / MTI with a large number of TR channels The radar greatly improves the calibration efficiency; the high-efficiency calibration algorithm is used to reduce the number of calibration iterations, improve the calibration accuracy and increase the reliability of the system calibration; the detailed functional division of each link of the calibration is carried out, and quantifiable functions are provided for each functional module. The index requirements are conducive to test verification and application in engineering practice. The reliable working performance of the active phased array radar is improved, which can adapt to the rapid development of modern battlefield reconnaissance and surveillance equipment, and meet the application requirements of SAR / MTI radar for multiple modes and multi-mode comprehensive reconnaissance and surveillance on the ground / sea surface.

Description

technical field [0001] The invention relates to the field of airborne radar technology, in particular to an airborne two-dimensional active phased array radar antenna calibration device and method. Background technique [0002] With the rapid development of modern battlefield reconnaissance and surveillance equipment, SAR / MTI radars should meet the needs of ground / sea comprehensive reconnaissance and surveillance. Tracking and other working modes, and can flexibly configure the number of channels in various modes. The flexibility of the traditional mechanical scanning antenna system cannot meet the real-time requirements of modern combat, while the two-dimensional active phased array antenna is covered with T / R components in the radiation unit, the aperture radiation efficiency is higher, the radiation power is greater, and the two-dimensional direction The beam scanning on the radar is more flexible, and the two-dimensional active phased array antenna system is an inevitab...

AI Technical Summary

Problems solved by technology

The performance of the antenna is degraded due to the mechanical and thermal deformation of the front surface, and the active microwave devices such as delay amplifier components and TR components are caused by factors such as changes in the working environment, aging of long-term working devices, or performance differences between components after replacement. Changes in the amplitude and phase of the excitation signal of the antenna radiation array element cause the decrease in the antenna sidelobe and beam pointing accuracy, which leads to a decrease in the detection ability and detection accuracy of the SAR / MTI radar for monitoring targets, affecting combat use

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