High performance 60 GHz antenna for electromagnetic energy harvesting

Harvesting energy from environmental sources has been of particular interest during these last few years especially from the electromagnetic waves. It has been recently reported that radio frequency rectennas (receiving antenna+ rectifying circuit), enable to collect microwave radiations and convert it to DC power [1-4]. The 60-GHz band is one potential solution to provide up to multi-Gb/s wireless connectivity. The band promise to be widely used for personal area network applications because it will be 40-100 times faster than today´s wireless LAN systems. In this work, we propose a concept of monolayer antenna at 60 GHz. We target to simultaneously maximize the gain, the efficiency, and the bandwidth. The return loss S11 of the simulated antenna achieves a bandwidth almost twice of that reported in for patch antenna. In addition, this proposed structure achieves 10.8 dBi gain, 89.12% of radiation efficiency and appropriate co-polarization level compared to recently reported results in the literature [5,6]. Our analysis of the geometric parameters shows clearly the importance of the feed line length, the ground dimensions, and the number of dipoles. The proposed antenna finds application in V-band communication systems.