Axis transform to characterise a monopulse twist reflector antenna and radome in an anechoic chamber

This paper presents a novel axis transform for a 3 axis positioner system located in an anechoic chamber. It allows for the true measurement of a twist reflector antenna with a radome. This progresses the field of antenna measurement as, uniquely, this axis transform allows the measured aberration caused by the antenna radome to be included. Simulated and measured results are shown to validate the use of the proposed transform.