# A Brief Introduction to Computational Electromagnetics

Computational electromagnetics, also known as electromagnetic modeling, is a fascinating study that helps scientists visualize the activity of electromagnetic waves on a given object. In computational electromagnetics, scientists use computers to solve, or at least approximate, solutions to Maxwell’s equations, mathematical formulas that describe the behavior of electric fields, magnetic fields, charges, and currents. They are a fundamental part of many areas of scientific study and advancement, including circuitry, and optics.

For computational electromagnetics, these equations are used to model the way an electromagnetic field will behave around an object. Prepared Maxwell’s equations are fed into supercomputers, though the systems are usually so complex that in most cases they aren’t completely solved, but rather approximated. This complexity arises from the number of iterations of complicated mathematical functions the computer has to perform in order to return a result. In order to get an accurate model, electromagnetic fields must be calculated for multiple instances in time, across numerous points, taking into account each possible interference or interaction. Because electricity and magnetism are linked, this is a daunting task, even for a supercomputer.

Computational electromagnetics is often used while designing communications technologies. For example, an engineer may be designing an antenna or other wireless receiver. These receivers function by detecting changes in electromagnetic waves, so it’s vital for the person designing them to be aware of how their devices interact with and create electromagnetic fields. Using computational electromagnetics practices, our friendly engineer can have an accurate visualization of the electromagnetic fields that would exist in his design.

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