Design of Dual ISM Bands Low Power Rectenna for Indoor Wireless Power Transfer Application

The paper concentrates on the design of a dual-band rectenna which consists of a receiving antenna, impedance matching, single-stage voltage doubler rectifier as well as a load. The rectenna is designed using HSMS 280C Schottky diodes as its main component and combined with the lumped elements, microstrip lines as well as quasi-Yagi with semi-bowtie as the driven element. The quasi-Yagi antenna with a semi-bowtie driven element is designed using Computer Simulation Technology (CST) and its Touchstone file is imported into the Advanced Design System (ADS) for simulation with the other components of the rectenna. The rectenna with an input power of −6dBm has an optimal Power Conversion Efficiency (PCE) of 32.1% while receiving a signal from the ISM 0.868GHz band transmitter and 18.8% using the input power of −7dBm at ISM 0.915GHz band. Both PCEs are obtained using 700Ω and 900Ω as load and producing minimum output voltage (Vo) of 0.3V and 0.28V respectively. The rectenna operates in both Industrial, Scientific, and Medical (ISM) 0.868GHz and 0.915GHz bands since both are unlicensed bands. The ISM 0.868GHz band is normally used in Europe while ISM 0.915 GHz band is widely used in the United States as well as Japan. The dual-band rectenna can be used for powering a power management unit such as EM8500 or AEM30300 in an indoor environment.