Receiving techniques used in the Queen Mary and Westfield College millimetre wave compact range

The author describes the various receiver configurations that are used in the QMW millimetre wave compact antenna test range to measure antennas in the frequency range 90-200 GHz. The millimetre wave compact antenna test range (mmCATR) at QMW is a single offset reflector constructed from 18 reflector panels of a design identical to those used in the James Clerk Maxwell radio telescope. The panels, with an RMS surface accuracy of between 10 μm and 16 μm, form a single offset CATR with focal length of 5.4 m and a reflector aperture that can contain a 3 m diameter circle. The range is enclosed by an anechoic chamber with a separate anti-chamber containing the transmit feed