2.45 GHz rectenna with high gain for RF energy harvesting

[...]harmonics has been eliminated by the introducing of triangular slot and ground plane to the developed design. Based on the previous works, there are many limitations and drawbacks exists in currently used technique such as only narrowband power is collected, expansion in the receiving band or an increase in the number of antenna elements enlarges the overall aperture size of the rectenna, the resulting devices are large and more difficult to install, harmonic rejection properties at the high-order frequency which limits the potential of further enhancement in the conversion efficiency [2]. Due to limitation of the different rectifier structure that produce low efficiency of around 18-37% [3-5], another rectifiers topology are developed to produce higher efficiency for the RF-to-DC power conversion [3] proposes a dual-band rectifier for RF energy harvesting systems that was designed to operate at 2.1 GHz and 2.45 GHz by using Schottky diode HSMS-285C of Avago Technology [4] has studied the rectifying circuit with single Schottky diode HSMS-2860 at 2.45GHz. A good overall performance has been presented for this proposed rectenna. Besides of its high gain property, this rectenna also has advantage of simplicity and low cost.