Design of rectenna for energy harvesting in ISM band

Abstract

Rectenna design for wireless RF energy scavenging is showcased in this paper. The rectenna design is divided into a microstrip planar antenna and an energy harvesting rectifier circuit. In the designed rectenna, antenna as well as rectifier resonates at 5.8 GHz. Advanced Design System (ADS) software was used as the simulation tool of microstrip planar antenna. The total size of the antenna is 18 × 13.2 × 0.8 mm3. The simulated antenna and rectifier circuit is impedance matched to a 50fl line over the ISM frequency band of 5.8 GHz band (5.725 GHz–5.875 GHz). The simulated antenna results are directivity (3.638 dBi), gain (2.89 dBi) and efficiency (84%). The radiation pattern is quite similar to omni-directional; which enables the simulated antenna to be useful for wireless device or any wireless sensor network (WSN) adopted to operate in ISM band of 5.8 GHz.