EMPIRE XPU is a state-of-the-art 3D simulator for electromagnetic fields, ideal for use in antenna and microwave circuit design. Utilizing the finite difference time domain (FDTD) method, it stands out for its unmatched simulation speed. The software allows for efficient EM simulations using the PC's full memory capabilities and supports a variety of structure import formats, making it easy to integrate with existing CAD designs. The interface is intuitive, offering a multilayer design feature that simplifies visualizing complex electromagnetic wave interactions.