The superposition principle combines multiple signals in order to show the resulting wave. XFdtd’s superposition simulation enables users to analyze antenna arrays and other multi-port devices. This post-processing option provides interactive manipulation of the input signals that compute near fields, far fields, efficiencies, and other results in real time. As a result, the design workflow for complex tasks such as MIMO beamforming array analysis is greatly simplified and streamlined. High-frequency MIMO and 5G device design requires extensive analysis to ensure proper performance, and beamforming applications increase that complexity with a multitude of states that must be analyzed. XF meets these challenges efficiently using superposition simulation.