and consists of an
antenna which captures the transmitted RF signal connected to
a rectifier (AC/DC converter) which converts the AC captured
signal into a DC power signal.
A power management circuit is
needed to store the DC power. For maximum power transfer,
a matching network is needed between the rectifier and the
antenna [4]. In order to decrease the size of the system,
the matching network is removed in [5] and the antenna is
directly matched to the rectifier (Zantenna = Z
rectifier).
In
both situations i.e. with or without a matching network, an
accurate behavior analysis of the rectifier impedance is crucial.