radioelectronicsИзвестия высших учебных заведений России. РадиоэлектроникаJournal of the Russian Universities. Radioelectronics1993-89852658-4794Saint Petersburg Electrotechnical University10.32603/1993-8985-2024-27-1-48-56radioelectronics-839Research ArticleЭЛЕКТРОДИНАМИКА, МИКРОВОЛНОВАЯ ТЕХНИКА, АНТЕННЫELECTRODYNAMICS, MICROWAVE ENGINEERING, ANTENNASИсследование характеристик элемента плоской антенной решетки Вивальди с расширенной полосой рабочих частотCharacteristics of the Radiating Element of a Planar Vivaldi Antenna Array with Improved Bandwidthhttps://orcid.org/0000-0002-6923-7917БобковИ. Н.BobkovI. V.

Иван Николаевич Бобков – инженер по специальности "Средства радиоэлектронной борьбы"

Некрасовский пер., д. 44, Таганрог, 347900

Ivan N. Bobkov, Engineer's degree in electrical engineering (2011, Southern Federal University), researcher at Advanced engineering school in Cyberplatform Engineering 

44, Nekrasovsky Per., Taganrog 347900

antennadesign@outlook.comhttps://orcid.org/0000-0001-8448-5508ЮхановЮ. В.YukhanovYu. V.

Юрий Владимирович Юханов – доктор технических наук (1997), профессор (2000), заведующий кафедрой антенн и радиопередающих устройств Института радиотехнических систем и управления 

Некрасовский пер., д. 44, Таганрог, 347900

Yury V. Yukhanov, Dr Sci. (Eng.) (1997), Professor (2000), Head of the Antenna and Radio Transmitter Department at Institute of Radioengineering Systems and Control

44, Nekrasovsky Per., Taganrog 347900

yu_yukhanov@mail.ruЮжный федеральный университетРоссияSouthern Federal UniversityRussian Federation2024290220242714856Copyright © Бобков И.Н., Юханов Ю.В., 20242024Бобков И.Н., Юханов Ю.В.Bobkov I.V., Yukhanov Y.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://re.eltech.ru/jour/article/view/839Введение

Введение. Основным механизмом расширения полосы рабочих частот в антенных решетках Вивальди является удлинение излучателей. Однако вслед за длиной излучателей увеличивается масса всего изделия и стремительно растет уровень кросс-поляризации. Исследования последних лет в этой области в основном были сфокусированы на техниках снижения уровня кросс-поляризационного излучения. Однако малоизученной остается возможность разработки антенных решеток Вивальди с расширенной рабочей полосой частот в первую очередь без изменения габаритных размеров излучателей или шага антенной решетки.

Цель работы

Цель работы. Разработка конструкции и исследование характеристик излучателя антенной решетки Вивальди, обеспечивающего работу в более широкой рабочей полосе частот, не прибегая к увеличению габаритов и массы.

Материалы и методы

Материалы и методы. Численное исследование характеристик элементарной ячейки с периодическими граничными условиями на гранях выполнено в программе ANSYS HFSS. Проведен сравнительный анализ характеристик элементарных ячеек антенной решетки-прототипа и предлагаемой конструкции.

Результаты

Результаты. Представлены результаты проектирования излучателя антенной решетки Вивальди с улучшенными характеристиками. Исследовано влияние отдельных параметров излучателя на его характеристики при работе в составе бесконечной антенной решетки. Проведен сравнительный анализ характеристик элементарных ячеек двух плоских бесконечных антенных решеток линейной поляризации: на основе предложенного излучателя и излучателя-прототипа. Показана возможность понижения нижней границы рабочей полосы частот на 18.6 % и снижения уровня кросс-поляризации на отдельных частотах до 15 дБ.

Заключение

Заключение. Предложенная конструкция излучателя позволяет расширить рабочую полосу частот антенной решетки, не прибегая к увеличению габаритных размеров. Проведенное численное исследование позволило определить ориентиры, которых следует придерживаться при разработке антенных решеток на основе предлагаемого решения.

Introduction

Introduction. The conventional approach to extending the operating frequency band of Vivaldi antenna arrays consists in increasing the radiating element length. However, this inevitably leads to an increase in the mass of the entire array, and, therefore, to a rapid growth in the cross-polarization level. Recent studies in this field have mainly focused on techniques for reducing the cross-polarization level. At the same time, the possibility of developing Vivaldi antenna arrays with an extended operating frequency band, primarily without changing the overall dimensions of the elements or the antenna array pitch, remains insufficiently studied.

Aim

Aim. Design and study of the Vivaldi antenna radiating element that ensures operation of the array in a wider operating frequency band without increasing its overall dimensions and weight.

Materials and methods

Materials and methods. A numerical study of the characteristics of a unit-cell with periodic boundary conditions on the side faces was carried out in the ANSYS HFSS software. A comparative analysis of the unit-cell characteristics of the prototype antenna array and the proposed design was carried out.

Results

Results. The design of the Vivaldi antenna radiating element is presented. The influence of some geometric parameters on the characteristics of the antenna array is studied. A comparative analysis of the unit-cell characteristics of two infinite single-polarization antenna arrays based on a regular Vivaldi element and the proposed solution is carried out. The possibility of improving the antenna array bandwidth by 18.6 % and improving cross-polarization by 15 dB on certain frequencies without increasing the overall dimensions or the antenna array pitch is shown.

Conclusion

Conclusion. The proposed Vivaldi antenna design makes it possible to extend its operating frequency band without increasing the overall dimensions. The results of the conducted numerical study should be used when developing antenna arrays based on the proposed solution.

антенные решеткиантенны Вивальдирасширение полосы частотэлементарная ячейкаantenna arraysVivaldi antennabandwidth extensionunit-cellИсследование выполнено за счет гранта Российского научного фонда № 22-1900537, https://rscf.ru/project/22-19-00537/ в Центре коллективного пользования "Прикладная электродинамика и антенные измерения" Южного федерального университета (Таганрог, Россия).This research was financially supported by Russian Science Foundation, project №22-19-00537, https://rscf.ru/project/22-19-00537/ and was performed at the Center of Collective Use "Applied Electrodynamics and antenna measurements", Southern Federal University, Taganrog, Russia.ReferencesGibson P. J. The Vivaldi Aerial // 1979 9th European Microwave Conf. Brighton, UK, 17–20 Sept. 1979. IEEE, 1979. P. 101–105. doi: 10.1109/EUMA.1979.332681Gibson P. J. The Vivaldi Aerial. 1979 9th European Microwave Conf. Brighton, UK, 17–20 Sept. 1979. 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The authors declare that there are no conflicts of interest present.