Protecting the Engine Speed Controller Board of UAV Against Conducted UWB Pulses

This work explores the possibility of applying modal filtration technology to protect the engine speed controller board of an unmanned aerial vehicle (UAV) from conducted ultra-wideband (UWB) pulses. The selection and justification of a specific UAV and its radio-electronic equipment are carried out. The main paths of UWB pulses propagation on the engine speed controller board are determined. Devices to protect the selected board from UWB pulses are proposed. Simulation and optimization (based on time and amplitude criteria) of modal filters (MF) are performed in quasi-static and electrodynamic analysis. Strip and cable structures are considered as MF. The simulation results demonstrate high efficiency of applying MFs to protect the engine speed controller board from UWB pulse excitation. As a result, UWB pulse with an EMF of 500 V and a total duration of 60 ps was attenuated from 44 times to 62 times. Finally, we developed MF prototypes suitable for use as part of UAVs to protect equipment against conducted UWB pulses.