P.V. Mikola1, I.A. Ivantsov2, R.S. Surovtsev3, E.C. Zhechev4

1–4Tomsk State University of Control Systems and Radioelectronics (Tomsk, Russia)

1mikolapavell@gmail.com, 2ilia.a.ivantsov@tusur.ru, 3roman.s.surovtsev@tusur.ru, 4zhechev75@gmail.com

Protecting radio-electronic equipment (REE) from intentional electromagnetic interference (EMI) is one of the most pressing issues in electromagnetic compatibility (EMC) today. Technological progress has not only increased the number of potential targets, but also made them susceptible to EMI due to the drive towards miniaturization and functionality of REE. According to IEC regulatory documents, the radiation from EMI sources is usually ultra-wideband (UWB), but today the likelihood of using broadband and narrowband radiation sources has increased. The variety of sources and the development of EMI generation technologies only emphasize the need to find ways to ensure effective protection. Protective devices based on coupled lines with modal decomposition have great potential. Decomposition is possible due to the difference in the phase propagation speeds of the components, and attenuation is achieved by reducing their amplitude. It has been found that reflections from inhomogeneities can be considered as a resource for additional suppression of UWB interference. Through modeling, the approach was tested on a meander line (ML) turn consisting of two segments with different parameters. The aim of the work is to experimentally study a ML-turn consisting of two segments for suppressing UWB-interference. The results of a comprehensive experimental study of the prototype proved that the proposed approach is applicable for attenuating UWB-interference. The results of the study show the possibility of designing devices based on an ML-turn using step impedance structures for suppressing UWB-interference.

Mikola P.V., Ivantsov I.A., Surovtsev R.S., Zhechev E.C. Experimental validation of the prospects for using stepped impedance structures for wideband interference suppression. Electromagnetic waves and electronic systems. 2026. V. 31. № 3. P. 49−60. DOI: https://doi.org/10.18127/j15604128-202603-06 (in Russian)

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