[[Image:Info_icon.png|40px]] For more detailed information about the stability of the FDTD algorithm, see '''[[Basic_FDTD_Theory#Waveform.2C_Bandwidth.2C_Stability| Waveform, Bandwidth, Stability]]'''.
=== The Advantages & Limitations of EM.Tempo's FDTD Simulator ===
A time domain simulation like FDTD offers several advantages over a frequency domain simulation. In certain applications, the time domain signature or behavior of a system, e.g. the transient response of a circuit or an antenna, is sought. In other applications, you may need to determine the wideband frequency response of a system. In such cases, using a frequency domain technique, you have to run the simulation engine many times to adequately sample the specified frequency range. In contrast, using the FDTD method requires a single-run simulation. The temporal field data are transformed into the Fourier domain to obtain the wideband frequency response of the simulated system. Among other advantages of the FDTD method are its versatility in handling complex material compositions as well as its superb numerical stability. It is worth noting that unlike frequency domain methods like the finite element method (FEM) or method of moments (MoM), the FDTD technique does not involve numerical solution of large ill-conditioned matrix equations that are often very sensitive to the mesh quality.