Mathematical simulation of electromagnetic fields inside an anechoic chamber of rectangular shape

A mathematical model for computing electromagnetic fields inside anechoic chambers of rectangular shape with walls covered with impedance coating has been developed for an operating frequency range from several kilohertz to tens of gigahertz. Numerical analysis is based on the solution of the corresponding difference Helmholtz problem. In the region of lower and medium frequencies, the solution is carried out using the method of variable directions, and, in the region of higher frequencies, this method uses multiprocessor systems with distributed memory for parallel computations. The computing results are given as well