The use of high-power electromagnetic sources to disrupt or maliciously damage electronic devices in critical power infrastructures is growing in concern. This paper presents a vulnerability study where a digital protection relay is exposed to high-power electromagnetic interference signals. The results reveal failures of this device that can impact the operation of power substations.

The response of antennas with nonlinear loads is investigated. In this contribution we present a method capable to perform simulations on antennas with multiple nonlinear loads that are less time and memory consuming than traditional proceedings. Moreover, these methods also contribute to a better understanding of observed effects. This is shown using an antenna with two nonlinear loads. A deep insight on how nonlinear loads affect the reception behavior of an antenna will be provided.

According to the Guide to the Expression of Uncertaintyin Measurement (GUM), uncertainties must be specified for each measurement. Therefore, this work's primary objective is to examine the effect of irregular deformed boundaries on the electromagnetic field and the resonance frequencies of a field generator (TEM-cell). Using a semi-analytical approach, the wave characteristics can be determined and the uncertainty contribution of the field generator can be estimated.

Large numbers of unexploded World War II bombs are recovered from the ground every year. However, it is often not clear whether an anonamly in the ground is actually dangerous goods or scrap. In this thesis an application of borehole radar is investigated, with which first a 2D image and then a 3D representation of the buried object is to be generated. Both performed simulation and field measurements show good results, even if optimizations are still necessary in the 3D representation.

In artificial ventilation of neonates uncuffed endotracheal tubes are commonly used. The unknown leakage hampers the detection of spontaneous breathing. A new method to measure respiration by using antennae has recently been presented. A respective setup is investigated numerically and experimentally. Both approaches show that the method seems capable of allowing a contactless triggering to synchronize ventilation. The results are compared to derive a better understanding of influencing factors.