A modification of the two-antenna method to determine the phase center location as well as the gain of a wideband antenna
July 19, 2015
Conference Paper
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Published in:
2015 IEEE Int. Symp. on Antennas and Propagation, 19-24 July 2015.
R&D Group:
Summary
A technique is presented for determining the amplitude center or phase center location of a wideband Vivaldi antenna at measurement distances of a few wavelengths. It is based on the well known two-antenna gain measurement technique but makes the antenna separation a variable. The phase center separation is shown to be proportional to the derivative of a transmission matrix loss parameter which is constant and independent of the antenna separation. A linear least squares fit to transmission loss parameters measured at several antenna separations is shown to yield the antenna gain and phase center location.