Changes

Each of [[EM.Cube]]'s computational modules provide one or more electromagnetic field solvers. At the end of a simulation, either the electric and/or magnetic fields in the computational domain are determined directly, or the electric and/or magnetic currents are computed, from which one can also determine the electric and magnetic fields. Electric and magnetic fields and currents are considered "primary" solutions or output quantities. In many practical cases, you may not be directly interested in the field or current distributions. Rather, you may want to compute "secondary" quantities such as input impedance, return loss, radiation pattern, radar cross section, or reflection and transmission coefficients of a periodic structure. These quantities are computed at the post-processing stage of a numerical simulation. Because the calculation of many of these characteristics are often time consuming, the data are not generated automatically. In most of [[EM.Cube]]'s computational modules, you have to define one or more observables to generate any output data at the end of a simulation. In other words, no simulation data is generated by itselfuntil you instruct [[EM.Cube]] to do so. [[EM.Cube]] provides a large variety of simulation data and observable types. Most of the output simulation data types are saved in ASCII data files. These data can be plotted or loaded into Python arrays for further processing.