Study of Impedance Matching in Antenna Arrays Due to Total Radiation
Abstract
The phenomenon of impedance mismatching in
antenna arrays is a potential source of performance
degradation, particularly when huge number of antenna
elements are placed side by side. Therefore, from its noticeable
impact on the performance of communication components and
systems, arose the necessity of studying the phenomenon of
mismatching so as to minimize its effect. However, in an array
of antennas, each antenna appears to be matched when
measured individually. Nevertheless, the problem of
mismatching reveals itself strongly when the whole array is set
to radiate. The value of the input impedance of individual
antenna elements changes versus antenna number and
position. In this research, the impact of total radiation from an
array on input impedance of individual antenna elements is
analyzed through theory. The obtained results are compared
through simulations and measurements.