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The performance of pattern reconfigurable antennas is evaluated
with the purpose of deriving a figure-of-merit for pattern reconfigurability.
A general formulation is provided for the average gain achieved
by a reconfigurable antenna (RA) in the presence of an incoming plane
wave with statistically distributed direction-of-arrival and polarization. It
has been observed that for usual scenarios, the polarization dependence
can be isolated and the RA performance is directly related to the maximum
realized gain achieved in each direction, averaged for all angular
directions. This average gain is proposed as figure-of-merit for pattern reconfigurability
and it is shown that it can be interpreted as the equivalent
number of configurations with non-overlapped radiation patterns. Finally,
this figure-of-merit is evaluated for several published RA’s showing
that it captures the intuitive notion of pattern reconfigurability, that is, the
number of different patterns that the RA can produce.
CitationRodrigo, D., Romeu, J., Capdevila, S., Jofre, L. A figure-of-merit for pattern reconfigurable antennas. "IEEE transactions on antennas and propagation", Març 2013, vol. 61, núm. 3, p. 1448-1453.
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