Engineering, Energy, Transport AIC


Issue №: 2(109)

Published: 2020.08.28
DOI: 10.37128/2520-6168-2020-2

В журналі вирішуються проблеми створення та удосконалення техніки та технологій для сільського господарства, харчових та переробних виробництв, машинобудування, енергетики та транспорту.

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DOI: 10.37128/2520-6168-2020-2-13
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Oleksandr Vozniak – сandidate of Science (Engineering), Associate Professor of the Department of Electric Power Engineering, Electrical Engineering and Electromechanics of Vinnitsia National Agrarian University (3 Soniachna St., Vinnitsa, 21008, Ukraine, email: alex.voz1966@gmail.com).
Andrii Shtuts – Assistant Professor, Department of Electric Power Engineering, Electrical Engineering and Electromechanics, Vinnitsia National Agrarian University (3, Solnechna str., Vinnitsia, 21008, Ukraine, email: shtuts1989@gmail.com).


Improving the performance of microwave devices can be achieved both through the use of a fundamentally new element base, and through the use of new circuit designs. In this respect, the direction of use of the reactive properties of transistors as well as transistor structures with negative resistance for the construction of information-measuring systems and operating and computing devices of the microwave range is promising in this respect.
In order to confirm the proposed methods, it is necessary to compare the results of the experimental studies using the proposed methods and means of measuring the W-parameters of real potentially unstable four-poles. As such four-poles it is proposed to use bipolar and transistors with a wide range of frequencies of potential instability. The paper develops mathematical models of W-parameters of such structures and evaluates their parameters in the frequency range.
The active four-pole is a transistor model. Its W parameters can be determined either experimentally - for specific conditions or calculated - by using a physical transistor replacement circuit. In most cases, the calculation path is more acceptable because it allows to obtain analytical expressions for the four-pole, it is important in the analysis of the influence of various factors on the characteristics of the scheme under study.
The inertial properties of the transistor are already manifested at relatively low frequencies and must be taken into account in practically the entire operating range of the transistor. The theoretical model holds up to frequencies f  2fт (where ft is the limit frequency) [1,3]. At higher frequencies, it is necessary to consider the parasitic reactive parameters of real transistors, first of all, the inductance of the terminals.
A physically T-equivalent equivalent transistor replacement scheme was proposed by Pritchard in a simplified version [4]. It has several varieties, differing in the configuration of the circuit consisting of the resistance of the base material and the capacity of the collector junction. If we carefully consider and compare the T and U-shaped circuits of the transistor substitution, it can be noticed that they differ only in the configuration of their inne    r part - the theoretical model. At high frequencies P and T, such circuits are not exact mutual equivalents. This is due to the approximation used in the transition from one circuit to another. However, the frequency characteristics of the circuits are very close. Each of them models the processes in the transistor with approximately the same accuracy, and in this sense they are equivalent.

Keywords: four-pole, bipolar transistor, w-parameters, calculation, circuits, studies, graphical method, mathematical equations.

List of references

[1].    Rudyk, A. V., Vozniak, O. M. (1998). Vysokochastotnyi amplytudno-fazovi metod yzmerenyia vlahosoderzhanyia sypuchykh veshchestv. Prylozhenye k Vseukraynskomu nauchno-tekhnycheskomu zhurnalu «Vybratsyy v tekhnyke y tekhnolohyy. 311–314. [in Ukrainian].
[2].    Bohachev, V. M., Volkov, V. M., Lysenko, V. H., Musiankov, M. Y. (1975). Raschet parametrov moshchnykh vysokochastotnykh tranzystorov. Radyotekhnyka y elektronyka. 610–620. [in Ukrainian].
[3].    Volodarskyi, Ye. T., Kukharchuk, V. V., Podzharenko, V. O., Serdiuk, H. B. (2001). Metrolohichne zabezpechennia vymiriuvan i kontroliu. (Navchalnyi posibnyk). VDTU. Vinnytsia. [in Ukrainian].
[4].    Kukharchuk, V. V., Kucheruk, V. Yu. (2003). Otsinka statychnykh metrolohichnykh kharakterystyk oposeredkovanykh vymiriuvan. Visnyk Vinnytskoho politekhnichnoho instytutu. Vinnytsia. 54–58. [in Ukrainian].
[5].    Filyniuk, M. A., Havrilov, D. V., Lishchenko, S. A. (2002). Metody i zasoby vymiriuvannia parametriv potentsiino nestiikykh bahatopoliusnykiv. Visnyk Tekhnolohichnoho universytetu Podillia. Khmelnitsky. 42–48. [in Ukrainian].
[6].    Filyniuk, N. A., Ohorodnyk, K. V., Lazarev, O. O. (2005). Sposib vymiriuvannia S–parametriv chotyrypoliusnyka, Visnyk Vinnytskoho politekhnichnoho instytutu. Vinnytsia. 86–89. [in Ukrainian].
[7].    Fylyniuk, N. A., Havrylov, D. V., Ohorodnyk, K. V. (2003). Yzmerenye ynvaryantnoho koэffytsyenta ustoichyvosty chetыrekhpoliusnyka. Vymiriuvalna ta obchysliuvalna tekhnika v tekhnolohichnykh protsesakh. 88–91. [in Ukrainian].

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About journal

Topics of the journal:

131 - Applied Mechanics

132 - Materials Science

133 - Industry engineering

141 - Power engineering, electrical engineering and electromechanics

208 - Agricultural engineering

The magazine "Engineering, Energy, Transport AIC" is included in the list of scientific professional editions of Ukraine on technical sciences

(Category "Б", Order of the Ministry of Education and Science of Ukraine dated 02.07.2020 №886)


Key information:
ISSN (print): 2520-6168
DOI: 10.37128/2520-6168

Certificate of state registration of mass media: No. 21906-11806 P dated 03/12/2016.

Founder of the journal: Vinnytsia National Agrarian University

Editor-in-chief: Tokarchuk Olexiy A.

Ph.D., Assoc., VNAU (Vinnytsia)

Deputy Editor-in-Chief: Veselovska Nataliia R.

Doctor of Technical Sciences, Full Prof., VNAU (Vinnytsia)

Executive Secretary: Polevoda Yuri A.

Ph.D., Assoc., VNAU (Vinnytsia)

Members of the Editorial Board:

Tokarchuk O.A. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

Veselovska N.R. - Doctor of Technical Sciences, Full Professor, Vinnytsia National Agrarian University

Bulgakov V.M. - Doctor of Technical Sciences, Full Professor, Acad. NAAS, National University of Life and Environmental Sciences of Ukraine

Iskovich-Lototsky R.D. - Doctor of Technical Sciences, Full Professor, Vinnytsia National Technical University

Bandura V. N. - Ph.D., Full professor, Vinnytsia National Agrarian University

Polevoda Yu.A. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

Tsurkan A.V. - Ph.D., Associate Professor, Vinnytsia National Agrarian University

Ivanchuk Y.V. - Ph.D., Associate Professor, Vinnytsia National Technical University

Jordan Todorov Maximov - Doctor of Technical Sciences, Full Professor, Technical University of Gabrovo (Bulgaria)

Type of publication: journal

Kind of publication: scientific

Publication status: domestic

Year of foundation: 1997

Periodicity: 4 times per year

Volume: 18-20 conv. print. sheet (А4)

ISSN: 2520-6168 (print version), (online version)

Language of publication: (mixed languages) Ukrainian, Russian, English

The sphere of distribution and category of readers: national, foreign, faculty, scientists, entrepreneurs.

The periodical edition is included to the List of scientific professional publications of Ukraine on technical sciences, approved by order of the Ministry of Education and Science of Ukraine in 05.16.2016, No. 515.

The journal "Engineering, Energy, Transport AIC" is included in the "Catalog of Ukrainian Publications".

Subscription to the journal can be issued in each post office. The subscription index is 99720.

History of journal:

It was founded in 1997 under the title "Bulletin of the Vinnitsa State Agricultural Institute." According to the Decree of the Presidium of the Higher Attestation Commission of Ukraine of September 11, 1997, this publication received the status of a professional in which it is allowed to publish the main results of dissertation researches.

In 2001-2014 the journal published under the title “Collection of scientific works of Vinnytsia National Agrarian University. Series: Technical Sciences "(Certificate of State Registration of Mass Media KV No. 16644-5116 PR of 04/30/2010).

Since 2015 journal has title "Engineering, Energy, Transport AIC" (Certificate of State Registration of Mass Media No. 21906-11806 P dated 03/12/2016).