Changes

* [[#Computing_Radiation_Patterns_In_SBR | Far Field Radiation Pattern]]* [[Hybrid_Modeling_using_Multiple_Simulation_Engines#Generating_Huygens_Surface_Data | Huygens Surface]]

A short dipole source is the simplest type of excitation for your propagation scene. A short dipole has an almost "omni-directional" radiation pattern, and is the closest thing to an isotropic radiator. EM.Terrano does not provide a theoretical/hypothetical isotropic transmitter because its SBR solver is fully polarimetric and requires a real physical radiator for ray generation. A transmitter is a more sophisticated source that requires a base point as well as an imported radiation pattern file with a '''.RAD''' file extension.

Of the above list of EM.Terrano's observables types, receivers are the ones you would typically use for your propagation scenes. Unlike a transmitter, a receiver by default does not require an imported radiation pattern file. A default receiver is assumed to be polarization-matched to the incoming ray. The other three observable types, field sensor, far fields and Huygens surface are primarily used in applications that utilize EM.Terrano as an [[Asymptotic Field Solver|asymptotic electromagnetic field solver]].  [[Image:Info_icon.png|40px]] Click here to learn more about defining field sensor observables for '''[[Data_Visualization_and_Processing#Visualizing_3D_Near-Field_Maps | Visualizing 3D Near-Field Maps]]'''. [[Image:Info_icon.png|40px]] Click here to learn more about computing radiation patterns using '''[[Data_Visualization_and_Processing#Far-Field_Observables | Far-Field Observables]]'''.