Cross-correlation and total efficiencies of two closely spaced sleeve dipole antennas

TitleCross-correlation and total efficiencies of two closely spaced sleeve dipole antennas
Publication TypeConference Paper
Year of Publication2005
AuthorsHynes, C. G., P. Hui, J. van Wonterghem, and D. G. Michelson
Conference NameAntennas and Propagation Society International Symposium, 2005 IEEE
Pagination799 -802 vol. 1B
Keywords3D anechoic chamber measurements, 3D uniform field incidence, anechoic chambers (electromagnetic), antenna coupling, antenna radiation patterns, cross-correlation coefficient, cross-polarisation ratio, dipole antennas, dipole separation distance, diversity performance prediction, diversity reception, microwave studio numerical simulations, pattern deformations, polarisation, S-parameter measurements, S-parameters, sleeve dipole antennas

This paper shows that for the special case of 3D uniform field incidence, with a cross-polarisation ratio (XPR) near unity, the cross-correlation coefficient and total efficiency are the measures for predicting diversity performance and can be estimated from measured 5-parameters. The results for the cross-correlation coefficients and efficiencies, as a function of dipole separation distance, are compared for two parallel side-by-side sleeve dipole antennas using three different methods: 3D anechoic chamber measurements, CST microwave studio numerical simulations, and S-parameter measurements. It is shown that the total efficiency is a critical diversity performance measure since the cross-correlation coefficients are very low due to pattern deformations and large efficiency degradations occur due to antenna coupling


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