Design optimization and implementation of multiband rectenna for efficient radio frequency energy harvesting

Radio frequency energy harvesting has become an interesting research area in the recent years. The energy harvesting circuit called rectenna mainly consists of an antenna and rectifier. In this paper an empirical rectenna model is designed for energy harvesting in the GSM900, 1800 band as well as 2.4GHz ISM band. A triple band symmetrical arm dipole antenna with seven stage voltage multiplier is usedto improve the overall efficiency. The measured results for prototype rectenna show good matching with the simulated results. The maximum efficiency of 32.5% is obtained for very low incident power density (e.g. ∼25μWatt/m
²
) in the GSM 900 band.