Some issues concerning antennas for HPM

This report tries to give estimations of the performance achievable in antennas designed for (mobile) HPM systems, including limitations due to the high power levels. In particular, this is done for one alternative, a vircator or similar generation of microwaves in vacuum. Other issues, such as possible power levels in structures consisting of metallic conductors, and impulse radiating antennas (IRA). This report does not contain an answer as the project has been searching for the right questions. However, it would seem that there are interesting power levels and carriers that isn´t compatible.