I. Introduction
Nowadays there is an increasing threat of the deliberate electromagnetic impact in the power supply network [1]. Such an impact can result in a malfunction or failure of electronic equipment. Ultrawide band (UWB) pulses impact is especially dangerous, because existing surge protectors do not protect against it [2]. It is known only about some industrial devices that protect against UWB pulses but have large dimensions and high cost. Thus, currently there is no both effective and cheap protection against UWB pulses. However, the increasing role of electronics in our life makes this protection essential.