Ellipsoid anechoic chamber for radiation pattern measurments

The construction of an anechoic chamber by covering the chamber walls with the electromagnetic absorbers is difficult and expensive. In this paper a fully metallic ellipsoid chamber structure is presented in which the electromagnetic waves are guided to a simple spherical absorber and an appropriate quiet zone is obtained inside the chamber. Therefore, the absorber usage is decreased greatly. The performance of the chamber is evaluated by simulation.