In this paper, we present a millimetre wave harvester consisting of a bow-tie antenna integrated with a hafnium dioxide (HfO2)-based metal-insulator-metal (MIM) diode, capable to rectify the incoming electromagnetic radiation in the V band (i.e. 40–75 GHz). We reduced significantly the diode resistance, thus improving antenna-diode matching, which is a major issue when using a MIM diode with a differential resistance in the order of hundreds or thousands of kΩ. In detail, we designed, fabricated and tested on a standard 4-inch silicon wafer a 61.6-GHz rectenna in which the vertical Au-HfO2-Pt MIM structure is integrated between antenna arms. The 6-nm-thick HfO2 single-layer guarantees a much higher DC current density of almost 3×104 A/cm2, in comparison with state-of-the-art single-layer MIM diodes. This way, the proposed rectenna efficiently harvests up to 250 μV with -20 dBm of incoming power, with a promising voltage responsivity of over 5 V/W. The results are very encouraging for their practical exploitation in future low-power solutions for energetically-autonomous 5G terminal equipment.
Bow-Tie Antenna Integrated with an HfO2 -Based MIM Diode for Millimetre Wave Harvesting
Shanawani, M.;Masotti, D.
2018
Abstract
In this paper, we present a millimetre wave harvester consisting of a bow-tie antenna integrated with a hafnium dioxide (HfO2)-based metal-insulator-metal (MIM) diode, capable to rectify the incoming electromagnetic radiation in the V band (i.e. 40–75 GHz). We reduced significantly the diode resistance, thus improving antenna-diode matching, which is a major issue when using a MIM diode with a differential resistance in the order of hundreds or thousands of kΩ. In detail, we designed, fabricated and tested on a standard 4-inch silicon wafer a 61.6-GHz rectenna in which the vertical Au-HfO2-Pt MIM structure is integrated between antenna arms. The 6-nm-thick HfO2 single-layer guarantees a much higher DC current density of almost 3×104 A/cm2, in comparison with state-of-the-art single-layer MIM diodes. This way, the proposed rectenna efficiently harvests up to 250 μV with -20 dBm of incoming power, with a promising voltage responsivity of over 5 V/W. The results are very encouraging for their practical exploitation in future low-power solutions for energetically-autonomous 5G terminal equipment.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
