Mathematical Simulating of Electromagnetic Field in the Quiet Zone of Pyramidal and Conical Tapered Anechoic Chambers: Comparison of Results

Two types of tapered anechoic chambers, conical and pyramidal, which are often used for measurements at low frequencies (up to 1GHz), are analyzed by means of mathematical simulation. The field characteristics in the quiet zone of both chambers are compared. The electromagnetic field inside the tapered chambers is calculated using the method of moments. The dielectric lens influence on the field in the quiet zone is investigated. Characteristics of the field passing through the lens are calculated using the geometric optics method.