Correction device and method for airborne two-dimensional active phased array radar antenna

Abstract

The invention discloses a correction device and method for an airborne two-dimensional active phased array radar antenna. The correction device comprises a two-dimensional active phased array antenna,a receiver, a signal processor and a display control unit. According to the correction device and method of the invention, the amplitude and phase error of the TR channels of a complex two-dimensional active phased array antenna is realized on the basis of the hardware architecture of the radar with no additional hardware resources required; an automatic correction function is adopted, so that the efficiency of the calibration of an airborne SAR/MTI radar with a large number of TR channels is greatly improved; an efficient correction algorithm is adopted, the number of correction iterations is reduced, correction accuracy is improved, and system calibration reliability is increased; detailed functional division is performed on each link of correction, and quantifiable indicator requirements are provided for each function module, and therefore, the test and verification of the correction device and method in engineering practice and the application of the correction device and method to the engineering practice can be benefitted; and the reliable operating performance of the active phased array radar is improved. The correction device and method can adapt to the rapid development trend of modern battlefield reconnaissance and surveillance equipment so as to meet the application requirements of SAR/MTI radars for ground/sea multi-mode and multi-mode integrated reconnaissance andsurveillance.

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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