A coupled multi-method approach for the numerical simulation of intentional electromagnetic interference into critical infrastructure

This paper provides a coupled multi-method approach to simulate the effects of a radiated intentional electromagnetic interference (IEMI) attack against critical infrastructure (CI) inside a building. An example scenario setup with source and a target building in an urban environment is introduced. To calculate the electromagnetic wave propagation in different areas of the scenario ray optical and full-wave numerical simulation methods are coupled stepwise. The segmentation of the scenario has the advantage of using methods whose techniques are optimally adapted to the respective high frequency wave propagation properties of the regions. An in-house aperture field method is used to simulate the penetration of the incident EM field through points-of-entry (POE) like a window with equivalent sources in CST Microwave Studio and with a Physical Optics method.