V.P. Meshchanov1, K.A. Sayapin2

1,2 NIKA-Microwave, Ltd (Saratov, Russia)

2 Saratov State University (Saratov, Russia); SVV LLC (Moscow, Russia)

1 nika373@bk.ru, 2 sayapin.k.a@mail.ru

Coaxial-to-waveguide transitions with an inductive type of coupling of mating transmission lines have become widespread in microwave technology. This is due to their high electrical and mechanical strength, as well as the possibility of manufacturing a coaxial connector without the use of solid dielectrics, which greatly simplifies and reduces the cost of construction.

In this paper, a new type of corner coaxial-to-waveguide transitions with an inductive type of coupling is proposed, in which the input of the coaxial transmission line is carried out through the narrow side wall of the waveguide. The matching element in them is made in the form of a communication loop with a loop.

Transitions from rectangular waveguides with an internal channel cross section of 23×10 mm and 23×5 mm to a coaxial line with internal dimensions of 2,92/1,27 mm have been developed and numerically studied. Mathematical modeling has shown that in the frequency band of 9,6…10,5 GHz, transitions provide a level of matching with a reflection coefficient of no more than –23 dB.

Meshchanov V.P., Sayapin K.A. Development of coaxial-to-waveguide transitions with connection of a coaxial line through a narrow waveguide wall. Achievements of modern radioelectronics. 2024. V. 78. № 10. P. 5–9. DOI: https://doi.org/10.18127/j20700784-202410-01 [in Russian]

1. Bokov S.I. i dr. Ustroystva soglasovaniya liniy peredachi. Issledovaniya dlya nazemnoy i sputnikovoy svyazi. Vnedrenie v proizvodstvo. Pod red. V.P. Meshchanova. M.: Radiotekhnika. 2019. [in Russian]
2. Vorob'ev A.V., Kats B.M., Meshchanov V.P., Sayapin K.A. Malogabaritnye soosnye koaksial'no-volnovodnye perekhody. Radiotekhnika. 2019. № 7. S.117–122. DOI: 10.18127/j00338486-201907(10)-18. [in Russian]
3. Durga M., Tomar S., Singh S., Suthar L. Millimeter wave in-line coaxial-to-rectangular waveguide transition. IEEE Applied Electromagnetics Conference. 2011. P. 200–20. DOI: 10.1109/AEMC.2011.6256817.
4. Cano J.L., Mediavilla A. Octave bandwidth in-line rectangular waveguide-to-coaxial transition using oversized mode conversion. Electronics Letters. 2017. V. 53. № 20. P. 1370−1371. DOI: 10.1049/el.2017.2507.
5. Ali Mehrdadian, Hojjat Fallahi, Mohsen Kaboli Design and Implementation of 0,7 to 7 GHz Broadband Double-Ridged Horn Antenna. 7th International Symposium on Telecommunications (IST'2014). 2014. P. 250–255. DOI: 10.1109/ISTEL.2014.7000707.
6. Ralph Levy, Louis W. Hendrick Analysis and Synthesis of In-Line Coaxial to Waveguide Adapters. Microwave Symposium Digest, IEEE MTT-S International. 2002. P. 809–811. DOI: 10.1109/MWSYM.2002.1011754.
7. Saad S.M. A More Accurate Analysis and Design of Coaxial-to-Rectangular Waveguide End Launcher. IEEE Transactions on Microwave Theory and Techniques. 1990. V. 38. № 2. P. 129–134. DOI: 10.1109/22.46421.
8. Doo-Yeong Yang Design and Fabrication of an End-Launched Rectangular Waveguide Adapter Fed by a Coaxial Loop. J. lnf. Commun. Converg. 2012. Eng. 10 (2). P. 103–107. DOI: 10.6109/jicce.2012.10.2.103.
9. Meynke Kh., Gundlakh F.V. Radiotekhnicheskiy spravochnik. T. 1. M.: Gos. energeticheskoe izd-vo. 1960.
10. Fel'dshteyn A.L., Yavich L.R., Smirnov V.P. Spravochnik po elementam volnovodnoy tekhniki. M.: Sov. radio. 1967. [in Russian]