Research Article UAVs Protection and Countermeasures in a Complex Electromagnetic Environment Anton O. Belousov , Yevgeniy S. Zhechev , Evgeniya B. Chernikova , Alexander V. Nosov , and Talgat R. Gazizov Department of Television and Control, Tomsk State University of Control Systems and Radioelectronics, Tomsk, Russia Correspondence should be addressed to Anton O. Belousov; ant1lafleur@gmail.com Received 3 March 2022; Revised 30 April 2022; Accepted 17 June 2022; Published 13 July 2022 Academic Editor: Chao Liu Copyright © 2022 Anton O. Belousov et al. is is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. e study considers the problem of ensuring electromagnetic compatibility of EMI-based functional destruction means with other radioelectronic equipment as part of a complex for countering unmanned aerial vehicles. To solve this problem, it is proposed to create a methodology that combines a set of diverse approaches and methods. is study focuses on the use of hollow and thin passive conductors, the use of a magnetodielectric in a reflection symmetric modal filter, the use of reflection symmetric structures for decomposing the train of ultrashort pulses (USP), and the use of a meander line as a protective means against USPs. e main results that are expected to be obtained using the proposed approaches and methods are outlined. 1. Introduction e last decade has been marked by intensification in the development of unmanned aerial vehicles (UAVs) because of their proliferation not only in the civilian but also in the military areas. UAVs make it possible to significantly re- duce the cost of services related to remote and real-time monitoring of the environment and objects, compared with traditional space or aviation systems [1–3]. Meanwhile, this time also witnesses the appearance of improved medium and small UAVs, which makes the tasks of countering them in highly controlled areas particularly urgent [4, 5]. In addition, modern UAVs are used as one of the most im- portant means of increasing the combat capabilities of the armed forces. Since UAVs have become widespread in military domain, intense research and development ac- tivities in this area has started, as can be seen from the works [6–10]. At the same time, this issue is relatively new, since the earliest work on the topic of countermeasures against UAVs [8] dates back to 2008, and the beginning of active scientific publications on this topic dates back to 2016–2017. It is well-known that the task of countering UAVs (which arose in the early 2000) can be solved in various ways: from the use of fire weapons (i.e., air defense) and electronic countermeasures against critical UAV systems to direct physical interception of UAVs and the use of EMI-based functional destruction means. e latter method seems to be the most promising, since it is devoid of the most serious drawback of electronic countermeasures means–the lack of an unambiguous reaction of the UAV to successful sup- pression. However, the EMI-based functional destruction means operate using the generators of powerful microwave and laser radiation. e examples of such EMI generators can be electromagnetic installations (electromagnetic ac- celerators or simply guns), explosive magnetic generators, warheads of antiaircraft guided missiles, and antiaircraft artillery shells with emitters of powerful electromagnetic microwave pulses. Consequently, the high power of the generated EMI and the difficulty of ensuring its selectivity in relation to the affected radioelectronic equipment (REE) worsen the internal electromagnetic environment inside the UAV countermeasures complex. In particular, the difficulty in ensuring the selectivity of the EMI excitation can lead to Hindawi Complexity Volume 2022, Article ID 8539326, 16 pages https://doi.org/10.1155/2022/8539326