this paper presents a different approach for a highly efficient Wireless Energy Harvesting (WEH) device design at 2.45 GHz for low-power density (I1W/cm 2 ) applications.Therefore, the high-efficiency rectifier was designed, in order to evaluate its harvesting performances; the rectifier was connected to a classical antenna and the energy harvesting characterization was performed. A correct model of a Schottky diode is necessary despite the nonlinear behavior. To increase the conversion efficiency an electromagnetic resonant phenomenon is proposed.To validate this method, we developed a rectifier circuit capable of recovering signals at 2.45 GHz with a high RF-DC efficiency conversion. For a low-power density of 1.3 I1W/cm 2 , the rectifier presents a maximum conversion efficiency of 70% and when connected to an antenna of 43%.

WiFi USB dongles still draw some attention in the scope of wireless LAN device technologies, especially regarding the design of the radiator, which must be compact. The present work proposes a compact planar IFA-based antenna for a dualband USB WiFi dongle. The design of the antenna was numerically assisted using the antenna analysis software Empire XCcelTM. Experimental validation was achieved assembling and testing a prototype under practical conditions such as the influence of the dongle case, and the effect of plugging the USB stick in different positions alongside a typical laptop. Overall, the antenna complied well with the design constraints, notably regarding the good frequency stability of the impedance match

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