A dielectric structure is loaded with energy (e.g., charge), which is retained therein until a trigger causes rapid discharge of the loaded energy and generation of an accompanying electromagnetic pulse (EMP). By appropriate design of the dielectric structure and/or trigger, the waveform of the EMP resulting from the rapid discharge can be tailored. Features of the dielectric structure can be modified and/or other devices can be coupled to the dielectric structure to also tailor the EMP, for example, to provide directionality. A modeling unit can predict the discharge in the dielectric structure and/or resulting EMP. The modeling unit can be used to determine charge density spatial distribution within the dielectric structure, shape of the dielectric structure, and/or actuation timing/location necessary to yield a desired waveform for the EMP emanating from the dielectric structure upon discharge.