Abstract
Problem statement. During operation, stationary large-aperture digital antenna arrays (DAA) are affected by climatic factors, including snow and ice cover. This influence inevitably leads to distortion of the amplitude-phase distribution (APD) of the field at the DAA aperture, which makes it necessary to consider and compensate for these factors on the APD of the antenna array field.Objective. Development of a more technically simple and precise method for compensating for APD field distortions at the aperture of a stationary large-aperture DAA caused by the influence of climatic factors of snow and ice cover.Results. The article analyzes the influence of climatic factors of snow and ice on the distortion of the APD field at the DAA aperture. The dependence of the power reduction of the probing signal on the thickness of the snow and ice layer at the aperture is obtained. The correction method of APD field distortions caused by climatic factors’ influence is developed, which is characterized by simplicity of technical implementation and higher accuracy of correction of distortions. A technical realization of the method of correction of distortions of the APD field is proposed.Practical implications. The developed method can be used at the stages of creation and operation of stationary large-aperture DAAs, taking into account the influence of climatic factors of snow and ice cover on the field APD.
Highlights
Stationary large-aperture digital antenna arrays (DAA) are affected by climatic factors, including snow and ice cover. This influence inevitably leads to distortion of the amplitude-phase distribution (APD) of the field at the DAA aperture, which makes it necessary to consider and compensate for these factors on the APD of the antenna array field
The article analyzes the influence of climatic factors of snow and ice on the distortion of the APD field at the DAA aperture
The correction method of APD field distortions caused by climatic factors’ influence is developed, which is characterized by simplicity of technical implementation and higher accuracy of correction of distortions
Summary
The article analyzes the influence of climatic factors of snow and ice on the distortion of the APD field at the DAA aperture. Посвященные компенсации искажений АФР поля в раскрыве антенны, вызванных влиянием снежного и ледяного покрытий [4,5,6,7,8,9,10]. Данный анализ [11] показал, что наиболее приемлемым методом борьбы с влиянием снежного или ледяного покрытия на характеристики направленности ЦАР является электронная компенсация искажений АФР на ее апертуре. АФР поля в раскрыве ЦАР, вызванная тем, что управляющие воздействия для изменения амплитуд и фаз сигналов, принятых каждым излучателем антенной решетки, формируют на основе сравнения измеренных значений с расчетными. Для ЦАР с размерами полотна антенны по высоте порядка 50 м над поверхностью земли значение толщины стенки гололеда определяют по формуле bре=ал bбаз ⋅ k,.
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