Efficient Dual-Band Meandered Loop Antenna for RF Energy Harvesting Applications at FM and GSM Bands

This paper presents an efficient dual-band meandered loop antenna for RF energy harvesting applications. The proposed antenna operates at FM (95 MHz) and GSM (925 MHz) bands and consists of a modified folded dipole antenna. The modified loop antenna with meandered load and the additional layer can function at both FM and GSM frequency bands with a proper gain. Furthermore, this modification leads to achieving an electrically small antenna with a maximum dimension of 35 cm × 35 cm at the FM band. The fabricated antenna reveals two distinct resonant frequencies with a favourable reflection coefficient. Thus, it can eliminate the need for an impedance matching circuit. Moreover, the peak antenna gains of 1.1 and 3.2 dBi at FM and GSM with an omnidirectional pattern are achieved, respectively. Hence, the proposed antenna can be an appropriate candidate for RF energy harvesting and wireless power transfer.