Abstract
On the basis of an analytical review of scientific and technical information sources dedicated to correction of errors in the gainphase distribution of the field on the aperture of the phased antenna array, such errors been caused by correlation of errors in phase quantization by discrete phase shifters, and also caused by disbursement of their characteristics and by failures in a part of the phased antenna array elements, an unresolved problem has been discovered. It is required to correct the amplitudephase distribution errors caused by deformation of the curtain of the large-aperture stationary phased antenna array and resulting in deviation of the radiating elements from their design parameters. A mathematical apparatus of the field distribution electronic correction is being developed together with an algorithm for controlling the radiation pattern of the phased antenna array. The effectiveness of the proposed method for correcting the array pattern distribution on the aperture of the deformed phased antenna array has been evaluated and an option for technical implementation thereof has been proposed.The relevance and novelty of the work is confirmed by the patent for the invention developed on the basis of the studies performed and by the certificate of state registration of the software, which was based upon in the processing of results of the measurements of the deformations in the curtain of the large-aperture phased antenna array.
Highlights
Ключевые слова: крупноапертурная стационарная фазированная антенная решетка, погрешности амплитуднофазового распределения поля, боковые лепестки, коэффициент направленного действия, пеленгационная характеристика
On the basis of an analytical review of scientific and technical information sources dedicated to correction of errors in the gainphase distribution of the field on the aperture of the phased antenna array, such errors been caused by correlation of errors in phase quantization by discrete phase shifters, and caused by disbursement of their characteristics and by failures in a part of the phased antenna array elements, an unresolved problem has been discovered
It is required to correct the amplitudephase distribution errors caused by deformation of the curtain of the large-aperture stationary phased antenna array and resulting in deviation of the radiating elements from their design parameters
Summary
Где λ – длина волны, м; Δxmn, Δymn, Δzmn – отклонения координат излучателей от проектных значений, м; θ0 и j0 – углы сферической системы координат, определяющие заданное положение главного максимума диаграммы направленности ФАР. В соответствии с изложенным компенсация погрешностей АФР на апертуре деформированной ФАР сводится к выполнению операций, приведенных на рис. G прием и хранение фаз токов возбуждения излучателей ФАР, определяемых в вычислителе фаз 7, которые обеспечивают установку луча антенны в заданное положение;. Одновременно эта информация от центрального процессора РЛС поступает на вход вычислителя фаз 7, в котором по формуле (5) определяются требуемые значения фаз токов возбуждения излучателей для установки луча ФАР в заданное положение. Введенные в состав устройства управления АФР на апертуре ФАР блоки 11–14 обеспечивают компенсацию дополнительных фазовых погрешностей, рассчитываемых по формуле (1), т. Введенные в состав устройства управления АФР на апертуре ФАР блоки 11–14 обеспечивают компенсацию дополнительных фазовых погрешностей, рассчитываемых по формуле (1), т. е. реализуют разработанный авторами математический аппарат коррекции АФР на апертуре деформированной ФАР
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