# Full Wave Solutions

Full wave solutions rigorously solve Maxwell's equations without making any assumptions regarding the nature of the electromagnetic problem. The solution can be either in the frequency or the time domain.

Full wave solutions rigorously solve Maxwell's equations without making any assumptions regarding the nature of the electromagnetic problem. The solution can be either in the frequency or the time domain.

**Introduction to the Method of Moments**

The MoM is the default solver in Feko. A simple electrostatic example is used to convey the basics of the solver.**The MoM for Full-Wave Solutions**

**MoM Computational Resources Scaling**

The usage of a dense matrix in the MoM implies a limit to the size of the problem that can be solved. The limit is determined by the available computational resources.**Other Methods Based on the MoM**

Specific methods, which can also be categorized as MoM methods, are tailor-made for solving dielectric bodies.**Additional Features and Extensions for the Method of Moments**

Numerous features and optimised electromagnetic (EM) analysis options for the method of moments (MoM) are available.**Multilevel Fast Multipole Method (MLFMM)**

The multilevel fast multipole method (MLFMM) is an alternative formulation of the technology behind the method of moments (MoM) and applies to much larger structures (in terms of the wavelength) than the MoM, making full-wave current-based solutions of electrically large structures a possibility.**Integral Equation Methods (EFIE, MFIE and CFIE)**

The relevant integral equation method can be used to solve a model to either obtain faster iterative or higher numerical accuracy when using the MoM or MLFMM.**Adaptive Cross-Approximation (ACA)**

The adaptive cross-approximation (ACA) is a fast method similar to the multilevel fast multipole method (MLFMM) but is also applicable to low-frequency problems or when using a special Green’s function.**Finite Element Method (FEM)**

The finite element method (FEM) is a solution method that employs tetrahedra to mesh arbitrarily shaped volumes accurately where the dielectric properties may vary between neighbouring tetrahedra.**Finite Difference Time Domain (FDTD)**

The finite difference time domain (FDTD) is a full wave time domain solution method, and Fourier transforms are applied to convert the native time domain results to the frequency domain.