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Measuring the impedance of balanced antennas by an S-parameter method

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2 Author(s)
Meys, R. ; ULB CP165, Brussels, Belgium ; Janssens, F.

The input impedance of a balanced antenna is conventionally measured by using a balun that forces opposite currents in each part of the radiator. In this paper, balanced antennas are viewed as two-ports, the S-parameters of which are determined by standard network-analyzer techniques. Simple formulas then lead to the differential input impedance. The method is illustrated by measurements on a dipole antenna, which are compared to the results for monopoles over a ground plane

Published in:

Antennas and Propagation Magazine, IEEE  (Volume:40 ,  Issue: 6 )