Dual-band Blade Antenna - Computational Electromagnetic Modeling (CEM)

Computational Electromagnetic Modeling (CEM)

Computational Electromagnetic Modeling (CEM)uses various methods to numerically calculate an antenna pattern.

To the untrained eye, this may seem a trivial process. Although, with some research and thought, one will realize that all local structures affect the radiation pattern either by reflection, absorption, refraction, fringing, or being a part of the radiating structure. Some structure which is not local will also cause these items and more including blockage and 're-radiation'. With this in mind, the calculation can become cumbersome.

Multiple algorithms exist in CEM. These include but are not limited to Method of Moments (MoM), Finite Element Method (FEM), and Uniform Theory of Diffraction (UTD). Two examples of software packages that use these methods in free-space are FEKO and WIPL-D. The examples shown here come from WIPL-D. Please keep in mind, these software packages must be used by someone who understands the process and can decide whether the calculated is real or if an error in the model and input data generated false output data (the old adage of garbage in equals garbage out).