Dual-Band Compact Antenna for UHF and ISM Systems

A compact planar dual-band antenna for UHF and ISM bands is proposed. The antenna is fabricated on a 45 mm × 80 mm × 0.787 mm Rogers Duroid (R) 5880 substrate and is intended for use in Wireless Power Transfer (WPT) and Power Harvesting (PH) systems. It covers the UHF band from 855-935 MHz making it a suitable antenna for UHF applications worldwide and the ISM band from 2.4-2.5 GHz. In order to exploit the power that can be harvested from the ambient environment, from entirely random directions, omnidirectional behavior was intended. A prototype of the antenna has been fabricated S-parameter measurements, radiation pattern and gain simulations are also presented. 1 5