Performance Analysis of a Rectangular Slot CPW Omnidirectional Antenna Integrated with a Voltage Doubler Circuit for RF Energy Harvesting

A rectangular slot microstrip antenna with a coplanar waveguide feedline for RF energy harvesting is presented in this paper. The novel antenna design works as a harvester antenna, is designed to match the 50 Ω impedance, and is integrated with an L-type matching voltage doubler rectifier circuit. The designed antenna provides an omnidirectional antenna covering the 2.45 GHz and 5 GHz bands, aiming to suit the application of Wi-Fi RF energy harvesting. The performance of the harvester antenna is analyzed by connecting it to the rectifier circuit with two different Schottky diode models. The performance exhibits good performance in terms of return loss and transfer coefficient for both comparisons. The antenna achieves UWB frequency ranges of 2.1436 GHz to 6.6113 GHz with an operating bandwidth of 4.4677 GHz, which covers the ultra-wideband fractional bandwidth of 102%.