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Proposed method for measurement of absorption loss and beam efficiency of large MM-wave reflector antennas in compact antenna test range by using hot and cold loads

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3 Author(s)
A. Lehto ; Radio Lab., Helsinki Univ. of Technol., Espoo, Finland ; J. Tuovinen ; A. Raisanen

A novel method to measure absorption loss and beam efficiency of large reflector antennas at millimetre wave frequencies is presented. It is based on a compact antenna test range (CATR) which has hot and cold loads placed at the focal plane. The size of loads is feasible. If the measurements are carried out with a CATR, the loads are difficult or impossible to realise. An analysis of the measurement of a 2 m antenna, using a low-noise receiver, shows that the accuracy is better than +or-0.1 dB for the loss and +or-1% for the beam efficiency.<>

Published in:

IEE Proceedings H - Microwaves, Antennas and Propagation  (Volume:138 ,  Issue: 1 )