EM.Ferma is a 3D electrostatic and quasi-static solver.
With EM.Ferma, one can explore the fields in the vicinity of charge distributions, voltage sources, and current sources. Transmission line parameters Z0 and EpsEff can also be solved for.
EM.Ferma is Methods Of Physical Optics ==
Physical Optics As An Asymptotic Technique
Many larger-scale electromagnetic problems deal with the modeling of radar scattering from large metallic structures (targets like aircraft or vehicles) or the radiation of antennas in the presence of large scatterer platforms. Although a full-wave analysis of such open-boundary computational problems using the method of moments (MoM) is conceptually feasible, it may not be practical due to the enormous memory requirements for storage of the resulting moment matrices. To solve this class of problems, you may instead pursue asymptotic electromagnetic analysis methods.
Asymptotic methods are usually valid at high frequencies as [math]k_0 R = 2\pi R/\lambda_0 \gt\gt 1[/math], where R is the distance between the source and observation points, k0 is the free-space propagation constant and λ0 is the free-space wavelength. Under such conditions, electromagnetic fields and waves start to behave more like optical fields and waves. Asymptotic methods are typically inspired by optical analysis. Two important examples of asymptotic methods are the Shoot-and-Bounce-Rays (SBR) method and Physical Optics (PO). The SBR method, which is featured in EM.Cube's Propagation Module, is a ray tracing method based on Geometrical Optics (GO). An SBR analysis starts by shooting a number of ray tubes (or beams) off a source. It then traces all the rays as they propagate in the scene or bounce off the surface of obstructing scatterers. T