Tapered anechoic test chamber
TA -Series Advanced ElectroMagnetics

The TA-Series is a standard line of fully-equipped tapered anechoic chambers, delivering high-performance Far-Field antenna testing capability. Ideally suited for performing a variety of measurements, the TA-Series has been specifically developed to meet the increased performance demands of today's wireless and general-purpose antenna measurement applications.
The tapered chamber is a spherical antenna range configured with one side tapering with square-to-round transitions to a true conical section.
The tapering walls bring the reflections into phase coherency so that they are all in phase in the test region, resulting in a smooth amplitude taper illuminating the antenna under test. The energy is transmitted from the conical section toward the terminating end wall absorbers at normal and near normal incidence. Chamber reflections and extraneous energy in the test region are determined primarily by the reflectivity performance of the pyramidal absorber on the end wall. By designing the chamber with high performance terminating wall absorbers, the TA-Series delivers greater accuracy for low frequency measurements (down to 200 MHz).