• Journal of the Korea Institute of Military Science and Technology
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• v.27 no.6
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• pp.693-702
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• 2024

This paper studies the implementation of an airborne AESA radar Hardware-in-the-Loop Simulation(HILS) based on near-field beam focusing. A RF simulated signal generator based on Digital RF memory receives a Tx signal from an exciter receiver processor unit of AESA radar, and then it transmits simulated various targets, clutter, and jamming signal through 400 phase array antennas. At that time, the airborne AESA radar focuses Rx beam in near-field region of an anechoic chamber in order to simulate a far-field beam pattern, and receives these signals from 1.5 m away. Through the simulated airborne radar environment inside an anechoic chamber, it reduces the number of flight tests and performs tests on the ground excluding external environmental factors.

• Journal of Advanced Navigation Technology
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• v.27 no.5
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• pp.546-551
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• 2023

In this study, a beam steering measurement system was developed to perform functions such as far-field beam steering and near-field beam focusing for TX/RX modes in the near file of the AESA radar. The beam steering measurement system consists of a spherical near-field scanner, an antenna positioner, a near-field controller, a network analyzer, a radar control system, a verification radar, a simulated radio, and an AESA radar. Using the developed system, the characteristics of TX/RX patterns before and after installation of radome to AESA radar were measured, and the beam pattern was analyzed through conversion to far field-after near-field measurement.The boresight error of the radar antenna device was measured, and it was confirmed that the main lobes were formed the same before and after the simulated radar dome was mounted.