10GHz Printed Circuit Antenna for Wireless Power Transfer Applications

A high gain fractal antenna is proposed for wireless power transfer (WPT) applications at 10GHz frequency bands. The antenna is shaped from a Deltoid-leaf geometry based on a circular ring slot radiator. Such triangular fractal slots are invoked to monetarize the antenna size when printed on a partial ground and fed by microstrip-line. The effects of the fractal slots are studied to realize the antenna radiation enhancement at 10GHz with excellent bandwidth at 3GHz with S
11
below −10dB. The proposed antenna is achieved to match a size of
$20\times 20\times 1.6\mathbf{mm}3$
with gain of 7.1dBi. The design methodology is discussed using a parametric study based on CST MWS software package to realize the optimal antenna dimensions with S11 bandwidth from 9.1GHz-12.1GHz and gain of 7.1dBi. The optimal-antenna design is re-simulated using HFSS software package for validation to show a good agreement between the obtained data.