International comparison of Ku-band standard gain horn characterization

International comparison of antenna measurement results between national measurement laboratories supports interoperability of communication equipment in today's world market. The National Institute of Standards and Technology (NIST) is the pilot National Measurement Institute (NMI) for an international comparison measurement of two Ku-band standard gain horn antennas that involved eleven other NMIs. A variety of measurement techniques such as extrapolation, far field, gain transfer and reciprocity, were used in this international comparison. The individual measurement techniques used by each NMI are indicated and the gain measurement results and associated uncertainties from each NMI are presented in this paper.