Electromagnetic visualization for antennas and scattering

Numerical electromagnetic modeling involves three distinct phases: the preparation of the geometric input data; running the numerical model; and evaluation or viewing/visualization of the model output. This paper presents visualization examples for frequency domain codes. Visualization quantities for antenna and scattering examples include geometry, currents, near fields, radiation images, and far field patterns that can be animated in time and space. A PC computer based EM visualization tool for post processing the results of any frequency domain (FD) model has been developed. The input data required from a FD code is simply the triangle geometry (points and triangle connectivity) and the current at each point (vertex) for each antenna or scattering excitation of the body. Current displays, near fields, radiation images, and far fields are then computed from the input current and geometry. The results presented were obtained from a triangular patch and body of revolution MOM codes.