Інститут Шосткинський (ШІ)
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Item Mathematical Model of a Square Waveguide Polarizer with Diaphragms(Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2021) Булашенко, Андрій Васильович; Bulashenko, Andrii Vasylovych; Piltyay, S.; Bulashenko, O.The development of new mathematical model for guide polarization converter with diaphragms was carried out in the research by the method of wave matrices. In addition, numerical modeling of the performance of a polarizer with diaphragms is made by simulating the propagation of the fundamental modes with perpendicular linear polarizations. The wave matrix model was obtained by splitting the polarizer into separate structural elements. Each element was described by its own wave transmission matrices. As a result, a general wave scattering matrix was formed. Based on the elements this matrix the electromagnetic characteristics of the considered polarizer were obtained theoretically. In particular, complex reflection and transmission coefficients were calculated. Their modules and phases were analyzed in the frequency interval 10.7–12.8 GHz. To check the correctness of the obtained results an independent numerical simulation was carried out applying the finite element methodology in the frequency interval. The results of both approaches are in good agreement. The engineered converter of polarization with four diaphragms provides a reflection coefficient modulus of less than 0.14 and a transfer coefficient modulus of more than 0.99 for two orthogonal types of polarizations. As a result, a rigorous mathematical method was developed to analyze the elements of the scattering matrix of a waveguide polarizer with diaphragms. It can be used for the development of new broadband waveguide polarizers and waveguide filters based on diaphragm elements.Item Electromagnetic Simulation of New Tunable Guide Polarizers with Diaphragms and Pins(Advanced Electromagnetics, 2021) Piltyay, S.; Булашенко, Андрій Васильович; Bulashenko, Andrii Vasylovych; Shuliak, V.; Bulashenko, O.In this article we present the results of electromagnetic simulation, development and optimization of a guide polarizer with a diaphragm and pins. An original mathematical model was obtained using the wave matrix approach for a guide polarizer with one diaphragm and two pairs of pins. The discontinuity elements were modeled as inductive or capacitive conductivities for two kinds of linear perpendicular polarizations of the electromagnetic waves. The theoretical model is based on wave scattering and transfer matrices. The total matrix of a polarizer was developed using wave matrices of transmission of separate elements of a polarizer’s structure. Using elements of the general S-parameters the electromagnetic characteristics of a considered polarizer were obtained. In order to test the performance of a suggested mathematical model, it was simulated in a software based on the finite elements method in the frequency domain. The presented design of a polarizer is adjustable due to possibility of mechanical tuning of the heights of applied pins. Considered guide polarizer with one diaphragm and two pairs of pins provides a reflection coefficient of less than 0.36 and a transmission coefficient of more than 0.93 for both linear perpendicularly polarized modes. Therefore, a new theoretical technique was developed in the research for fast electromagnetic simulation of wave matrix elements of a guide polarizers with diaphragms and pins. Developed simulation approach can also be widely used for the development of new tunable guide filters, polarizers, rotators and other microwave components with diaphragms and pins.Item Polarization conversion device based on a waveguide with pins(Sumy State University, 2021) Dmytrenko, V.Y.; Булашенко, Андрій Васильович; Bulashenko, Andrii Vasylovych; Piltyay, S.І.; Bulashenko, O.V.Today, one of the key elements of antenna systems engaged in polarization signal processing are polarization devices. These devices are used to convert the types of polarization. The following designs of polarizers in the form of waveguide structures with posts [1], irises [2, 3], ridged structures [4], polarizers with thin metal septum [5] are known. The designs of polarizing devices in the form of slots [6] are complex in design. Phase shifters [7] and filters [8] also had such constructions. In addition, polarizers are built directly into antennas [9].Item 90 degre phase shifter based on a square waveguide with diaphragms(Sumy State University, 2021) Shtykо, T.V.; Piltyay, S.І.; Булашенко, Андрій Васильович; Bulashenko, Andrii Vasylovych; Zabegalov, I.V.Modern antenna systems with polarization signal processing are used to improve the information parameters of the signals processed in them [1, 2]. The basic elements of such systems are waveguide filters [3], phase shifters [4] and polarizers [5, 6]. Phase shifters provide the required phase values at the output. Polarizers provide a differential phase shift at the output of 90º [7]. The most common structures of waveguide polarizers are structures with diaphragms [8, 9], pins [10, 11], combined with pins and diaphragms [12, 13], and coaxial structures [14, 15] and ribbed structures [16, 17]. Differential phase shifter is used in the development of phased array antennas, in the formation of the beam in modern antenna systems and for power supply systems of modern antennas [18]. Modern 90º phase shifters [19, 20] have advanced functionality, simple compact geometric shape, resistant to amplitude imbalance, the ability to maintain a stable phase with multibeam propagation. In addition, such devices are sometimes used in 5G systems [21].Item Polarization transformer with combination of diaphragms and pins(Sumy State University, 2021) Saranchuk, A.P.; Piltyay, S.І.; Булашенко, Андрій Васильович; Bulashenko, Andrii VasylovychRecently, polarization signal processing has become widespread. It is used in satellite information and telecommunication information processing systems. One of the key elements of such systems are polarization conversion devices. The basic function of such devices is to transform the types of polarization. There are different designs of polarizers. The most common are polarizers in the form of ridged structures [1], polarizers with thin metal septum [2, 3], polarizers based on irises in the waveguide [4-6] and polarizers based on waveguides with posts [7, 8]. There are also designs of polarizers with irises in the form of thin slots [9]. But such constructions are complex. The most broadband and simple design is a waveguide polarizer based on irises.Item Adjustable polarization conversion device for FSS-range(Sumy State University, 2021) Kot, М.H.; Кalinichenko, Y.І.; Булашенко, Андрій Васильович; Bulashenko, Andrii Vasylovych; Piltyay, S.І.; Bulashenko, O.V; Zabegalov, І.V.Every year the need for the use of polarizing devices in modern telecommunications systems increases. Polarization signal processing used in satellite [1, 2], telecommunication information processing systems 5G [3-5] and OFDM systems [6-8] is also becoming widespread. Such devices are polarizers that have different designs, but they have one common function - the transformation of the types of polarization [9]. The simplest and most popular are rectangular waveguides containing diaphragms and pins as reactive inhomogeneities [10-13], which are widely used in the Ku range, ie for satellite communication. In general, the Ku band can be divided into three subbands: 10.7-11.7 GHz; 11.7-12.5 GHz; 12.5-12.8 GHz, but in this paper the results for the whole band will be presented, without division into subbands. The polarizer contains reactive elements - diaphragms, which act as a reflective element for further coordination [14- 16]. However, if the disadvantage of a polarizer with diaphragms only is that there is no further adjustment of the characteristics depending on the needs before use, the characteristics are static after manufacture, this is why we should still use the pins that help us with this dilemma. Reactive elements are also used in various waveguide filters [17-19]Item Адаптація першокурсників(Сумський державний університет, 2016) Булашенко, Андрій Васильович; Булашенко, Андрей Васильевич; Bulashenko, Andrii VasylovychЯк відомо, слово «студент» з латинської мови перекладається, як людина, що старанно працює, навчається, тобто оволодіває знаннями. Зупинимося на проблемі адаптації пешокурсників до навчання у вищих навчальних закладах, оскільки вона є актуальною. Різка зміна багаторічного стереотипу роботи, до якого звикли учні загальноосвітніх шкіл, іноді приводить до нервових зривів і стресових ситуацій. Перебудова динамічного стереотипу у кожного студента протікає індивідуально і залежить як від типу нервової діяльності, так і від соціальних чинників.Item Британський стандарт в електромонтажних роботах в будинку(Сумський державний університет, 2016) Булашенко, Андрій Васильович; Булашенко, Андрей Васильевич; Bulashenko, Andrii VasylovychВ сучасній українській родині наявність оргтехніки, складної побутової техніки (пральна машина, посудомийна машина і т. д.) стають повсякденною річчю. Оскільки більшість зазначеного обладнання поставляється до нас з країн південно-східного регіону, то в комплекті з обладнанням не рідко виявляється додатковий силовий кабель на додачу до європейського. Що ж з ними робити? З одного боку, викинути кабелі шкода (бо, якість і кабелю, і вилки дуже хороші, і, найчастіше, помітно вище по якості), а з іншого боку, застосувати їх начебто нікуди.Item Аналіз антени витікаючої хвилі(Сумський державний університет, 2016) Булашенко, Андрій Васильович; Булашенко, Андрей Васильевич; Bulashenko, Andrii VasylovychБільшість публікацій з антен витікаючих хвиль відносяться до періодичних випромінюючих структур. Хоча існує багато робіт з цих типів антен, але дослідження та розробки в цій області тривають. Удосконалюються методи моделювання та технології виготовлення, також розширюється область використання таких антен.Item Аналіз мережі третього покоління UMTS(Сумський державний університет, 2016) Булашенко, Андрій Васильович; Булашенко, Андрей Васильевич; Bulashenko, Andrii Vasylovych; Забегалов, І.В.Радіомережа стандарту UMTS (Universal Mobile Telecommunications System) – система мобільного зв’язку третього покоління, що розроблена у межах IMT2000 Європейським Інститутом Стандартів Телекомунікацій (ETSI) для впровадження 3G у Європі.