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Phase centers of microwave antennas

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1 Author(s)
Carter, David ; San Jose State College, San Jose, CA, USA

This paper is concerned with the location of the phase centers of microwave antennas. The inadequacy of conventional aperture theory for the accurate description of phase centers is discussed. Formulas are developed and, for numerical indications, calculations are made for paraboloidal reflectors of differentf/Dratios and a class of primary patterns which provide an approximate representation of a great many common feeds. The results are presented in graphical form to provide useful design information and show the dependence of principalE-andH-plane phase center location on feed and dish parameters. Contrary to the prediction of aperture theory, it is shown that the phase centers of axially symmetric antennas are not in the aperture plane, but they are dispersed about it.

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Antennas and Propagation, IRE Transactions on  (Volume:4 ,  Issue: 4 )