Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2020. No. 9
ContentsFull text in Russian (pdf)
DOI https://doi.org/10.30898/1684-1719.2020.9.12
UDC 621.391.825
Modal decomposition of the ultrashort pulse in 8-conductor reflection symmetric structures
E. B. Chernikova, T. R. Gazizov
Tomsk State University of Control Systems and Radioelectronics, Lenina Ave., 40, 634050, Russia
The paper is received on September
19, 2020
Abstract. Protection of radio electronic equipment (REE) against conductive interferences penetrating into REE directly through the conductors, for example, signal conductors or power circuits is in the focus of the paper. To solve this problem, filtering devices are traditionally used, which are usually connected to the input of the protected equipment (for example, LC- and RC-filters, varistors, arresters, TVS-diodes). However, there are conductive interferences, the duration of which is in the nanosecond and sub-nanosecond ranges. Such interferences are called ultrashort pulses (USPs). Due to the fact that widely used devices for protection against interference cannot be effective, because of the time and energy characteristics of the USP, a new method is proposed, called modal filtration. In order to obtain higher characteristics, it is possible to change the configuration of the modal filter (MF) structures, thus creating favorable conditions for more effective decomposition of the MF. An indicative example is the use of structures with symmetry. Thus, a new approach for improving the modal filtration technology by using a 4-conductor reflection symmetric structure, which decomposes the USP by 4 pulses of 4 times smaller amplitude is known. In this paper, we consider the possibility of using symmetry for the subsequent division of USP by a doubled number of pulses of 2 times smaller amplitude. For the first time the quasistatic simulation of time response of 2 8-conductor reflection symmetric structures of circular, square and rectangular configurations was performed. It is shown that these MFs are able to decompose the USP into a sequence of 8 pulses, but to obtain the required level of attenuation, additional optimization is required according to several criteria.
Key words: electromagnetic compatibility, protection devices, ultrashort pulse, modal filtration, reflection symmetry.
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For citation:
Chernikova E.B., Gazizov T.R. Modal decomposition of the ultrashort pulse in 8-conductor reflection symmetric structures. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2020. No.9. https://doi.org/10.30898/1684-1719.2020.9.12 (In Russian)