METHOD OF DETERMINING THE DIAGRAMS OF THE DIRECTION OF THE ACTIVE PHASED ANTENNA ARRAY

摘要

FIELD: radio engineering, communication.;SUBSTANCE: invention relates to methods for determining the directional pattern of active phased antenna arrays (APAA) during tuning and research. APAA is located at a given distance from the auxiliary antenna, emits the generated electromagnetic field in the direction of the investigated APAA and receives signals emitted by the auxiliary antenna being investigated by APAA. With a fixed pivoting device, the complex transmission coefficients of each receiver channel are measured, forming calibration coefficients on the basis thereof in the reception mode. Then, the received APAA signals sent by the auxiliary antenna are received and the complex transmission factors of each receiving channel are measured, forming on their basis the complex DF of the receiving channels, taking into account the sphericity of the phase front of the received electromagnetic wave and the generated calibration coefficients in the reception mode, by rotating the APAA located on pivoting device. DF APAA in the reception mode is determined on the basis of the mathematical model, using the generated complex DF of the receiving channels. To obtain DF APAA in the transmission mode, the signal conditioner is connected in turn to the input of each APAA transmission channel, the complex transmission coefficient of the transmission channel is measured with the fixed rotary device and without open APAA radiation in the free space and converted into amplitude and phase of the signal. Based on the results of the transformed amplitudes and phases of the complex channel transmission coefficients, the amplitude-phase distribution at the outputs of the APAA transmitting channels is determined. DF APAA in the transmission mode is found as the sum of the weighted complex DFs of the APAA receiving channels with coefficients corresponding to the complex amplitudes of the amplitude-phase distribution at the outputs of the APAA transmission channels.;EFFECT: elimination of open radiation when determining DF APAA in the transmitting mode.;2 dwg