A.A. Skvortsov – Ph.D. (Eng.), Associated Professor, 

Department «Radio Electronics and Telecommunications», Yuri Gagarin State Technical University of Saratov E-mail: sotrudniki.1@yandex.ru

Investigation of electromagnetic properties of a rectangular waveguide with two dielectric slabs arranged symmetrically near its narrow walls is of independent practical interest, since in some cases such structures are preferable than structures with a central location of the dielectric material. One of the important electrodynamic problems to be solved in the design of microwave devices based on pieces of the analyzed guide system is to determine the wave impedance of a rectangular waveguide with two dielectric slabs located symmetrically near its narrow walls, the knowledge of which is useful in ensuring the matching of plumbings, calculation of transmission coefficients of loop branching, accounting of reflections from discontinuities, etc. There are known quasi-analytical techniques of calculating the propagation constant and wave impedance of a rectangular waveguide with an inhomogeneous dielectric filling, based on representing it in the form of an equivalent guide system of analyzed cross section filled with a homogeneous dielectric material. This model was also used to determine the wave impedance of a rectangular waveguide with two Based on the formulas obtained on the basis of the model used, a quasi-analytical calculation of the wave impedance of a rectangular waveguide determined by different methods for various geometrical sizes, electro physical parameters of inhomogeneous dielectric filling and operating wavelength was carried out. To confirm the correctness of the results obtained, they were compared with known numerical data. A comparison of the results of a quasi-analytical calculation of the wave impedance of a rectangular waveguide with the known numerical data showed their fairly good agreement. Besides, their discrepancy increased with an increase in the relative dielectric constant of the slabs and decreased in the region of the minimum and maximum filling of rectangular waveguide with a dielectric.  The quasi-analytical technique for calculating the wave impedance of a rectangular waveguide determined by different methods, considered in this paper made it possible to establish explicitly the dependence of the analyzed elecrodynamic parameter on the geometrical sizes and electrophysical parameters of the inhomogeneous dielectric filling of the transmission line under consideration and can be useful in the design of various microwave devices based on this guide system.

Скворцов А.А. Квазианалитический расчет волнового сопротивления прямоугольного волновода с двумя диэлектрическими пластинами, расположенными симметрично около его узких стенок // Радиотехника. 2020.  Т. 84. № 8(15). С. 27−31. DOI: 10.18127/j00338486-202008(15)-04.

1. Manojlov V.P., Morozov D.S., Chuhov V.V. Vipromіnjuvach elektromagnіtnih hvil' dlja ustanovok dіatermіїї. Vіsnik Zhitomirs'kogo derzhavnogo tehnologіchnogo unіversitetu. Serіja: Tehnіchnі nauki. 2015. № 1. S. 70–76.
2. Berger M.N., Kapilevich B.Ju. Prjamougol'nye volnovody s dijelektrikami. M.: Sovetskoe radio. 1973. 256 s. (In Russian).
3. Kolomejcev V.A., Komarov V.V. Mikrovolnovye sistemy s ravnomernym ob’emnym nagrevom. Ch.1. Saratov: Sarat. gos. tehn. un-t. 1997. 160 s. (In Russian).
4. Satarov I.K., Komarov V.V. Mikrovolnovye ustrojstva s begushhej volnoj dlja termoobrabotki dijelektricheskih materialov. Saratov: Sarat. gos. tehn. un-t. 2000. 119 s. (In Russian).
5. Arhangel'skij Ju.S. SVCh-jelektrotermija. Saratov: Sarat. gos. tehn. un-t. 1998. 408 s. (In Russian).
6. Manojlov V.P., Chuhov V.V. Rozrahunok hvilevodіv z chastkovim dіelektrichnim zapovnennjam. Vіsnik NTUU «KPІ». Radіotehnіka. Radіoaparatobuduvannja. 2006. № 33. S. 91–100.
7. Skvorcov A. A. Metodika kvazianaliticheskogo rascheta volnovogo soprotivlenija prjamougol'nogo volnovoda s kusochno-sloistym dijelektricheskim zapolneniem. Radiotehnika. 2018. № 8. S. 171–174.DOI: 10.18127/j00338486-201808-32 (In Russian).
8. Lebedev I.V. Tehnika i pribory SVCh. M.: Vysshaja shkola. 1970. T. 1. 440 s. (In Russian).