Abstract
Introduction. In this work, we consider the problem of a radiator synthesis with the 50-Ohm port at the input in the frequency range of 0.9…5.8 GHz. At present, this frequency range is the most relevant for the electromagnetic environment analysis due to information exchange with the on-board equipment of unmanned aerial vehicles is most often realized in this frequency range.Objective. The main objective of this work is the synthesis of a radiator for an ultra-wideband antenna array in the frequency range of 0.9…5.8 GHz.Materials and methods. In this work, the method of full-wave electromagnetic simulation is used for the broadband radiator synthesis. The characteristics of the radiator are optimized by simulation and confirmed by experimental investigations of the radiator model. The antenna radiation pattern measurements are carried out in the anechoic chamber and standing wave ratio (SWR) is calculated by using the network analyzer.Results. A non-analytical method of the model parametric optimization considering the SWR<2 criterion and using the latest tools of the full-wave electromagnetic simulation is proposed. The examples of the designed optimized model with the final values of all parameters are reported. The calculated distributions of the electric field over the antenna, calculated radiation patterns at several frequency points, and calculated SWR of the model are presented. The radiator model is made taking into account simulation and optimization results. The measured main cross-sections of the radiation pattern and SWR of the model are shown. Conclusion. In the present work, the broadband radiator model in the frequency range of 0.9…5.8 GHz is designed. The machining and brief comparative analysis of the calculated and measured antenna characteristics is carried out and demonstrated a good agreement. The advantages of the proposed method and designed radiator model are described. The results of this work are relevant in the tasks of observation, direction finding and signals reception from unmanned aerial vehicles. Key words: ultra-wideband antenna, Vivaldi antenna, microwave range, full-wave electromagnetic simulation><2 criterion and using the latest tools of the full-wave electromagnetic simulation is proposed. The examples of the designed optimized model with the final values of all parameters are reported. The calculated distributions of the electric field over the antenna, calculated radiation patterns at several frequency points, and calculated SWR of the model are presented. The radiator model is made taking into account simulation and optimization results. The measured main cross-sections of the radiation pattern and SWR of the model are shown.Conclusion. In the present work, the broadband radiator model in the frequency range of 0.9…5.8 GHz is designed. The machining and brief comparative analysis of the calculated and measured antenna characteristics is carried out and demonstrated a good agreement. The advantages of the proposed method and designed radiator model are described. The results of this work are relevant in the tasks of observation, direction finding and signals reception from unmanned aerial vehicles.
Highlights
In this work, we consider the problem of a radiator synthesis with the 50-Ohm port at the input in the frequency range of 0.9...5.8 GHz
Дальнейшая оптимизация по параметру осуществлялась методом половинного деления интервала до тех пор, пока удовлетворительные изменения коэффициента стоячей волны (КСВ) оставались существенными
Для оптимизации формы фазового фронта следует оптимизировать параметры линзы отдельно, так как ее форма слабо влияет на согласование антенны
Summary
Рассмотрена проблема синтеза направленного излучателя с 50-омным портом на входе, в частотном диапазоне 0.9...5.8 ГГц. Данный диапазон на сегодняшний день является наиболее актуальным для анализа электромагнитной обстановки, так как в этой полосе частот наиболее часто реализуется обмен информацией с бортовой аппаратурой беспилотных летательных аппаратов. Синтез направленного широкополосного излучателя в частотном диапазоне 0.9...5.8 ГГц. Используется метод электродинамического моделирования для синтеза широкополосного излучателя. Предложен неаналитический метод параметрической оптимизации модели по критерию КСВ < 2 с помощью новейших средств электродинамического моделирования. Представлены снимки расчетного распределения электрического поля по полотну антенны, расчетные диаграммы направленности на нескольких частотных точках, расчетный КСВ модели. В результате представленного исследования разработана модель широкополосного излучателя в диапазоне 0.9...5.8 ГГц, проведено макетирование и краткий сравнительный анализ расчетных и измеренных характеристик антенны, демонстрирующий хорошее совпадение. Результаты работы актуальны в задачах наблюдения, пеленгации и приема сигналов от беспилотных летательных аппаратов. А. Синтез направленного излучателя в диапазоне 0.9...5.8 ГГц // Изв. Статья поступила в редакцию 09.04.2019; принята к публикации после рецензирования 02.08.2019; опубликована онлайн 27.09.2019
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