In this paper, we propose a rectenna based on a graphene self-switching diode for Ka band applications in view of the upcoming 5G and internet-of-things telecommunication systems. A 4-element patch antenna array has been designed, simulated, and fabricated using a high-resistivity silicon/silicon dioxide/graphene multi-layer and tested on-wafer. By using analytical formulas to optimize the number of parallel channels for the diode, we have achieved highly improved DC current values (average value of ±2mA at ±3V). The diode has been integrated with the array in coplanar waveguide technology using a matching open stub, in order to maximize the array-to-diode power transfer. The rectenna has then been measured by using a 28GHz RF source: at 0V DC bias, a maximum DC voltage VDC of 2.4mV has been obtained, with a maximum DC current IDC of 1.2μA and a maximum DC power PDC of 2.9nW; when applying a small DC bias (1.2V), VDC reaches 71mV, IDC=35.5μA and PDC=2.5μW.

Graphene diodes for 5G energy harvesting: Design, simulations and experiments

Shanawani M.;Masotti D.
2019

Abstract

In this paper, we propose a rectenna based on a graphene self-switching diode for Ka band applications in view of the upcoming 5G and internet-of-things telecommunication systems. A 4-element patch antenna array has been designed, simulated, and fabricated using a high-resistivity silicon/silicon dioxide/graphene multi-layer and tested on-wafer. By using analytical formulas to optimize the number of parallel channels for the diode, we have achieved highly improved DC current values (average value of ±2mA at ±3V). The diode has been integrated with the array in coplanar waveguide technology using a matching open stub, in order to maximize the array-to-diode power transfer. The rectenna has then been measured by using a 28GHz RF source: at 0V DC bias, a maximum DC voltage VDC of 2.4mV has been obtained, with a maximum DC current IDC of 1.2μA and a maximum DC power PDC of 2.9nW; when applying a small DC bias (1.2V), VDC reaches 71mV, IDC=35.5μA and PDC=2.5μW.
2019 49th European Microwave Conference, EuMC 2019
37
40
Aldrigo M.; Dragoman M.; Iordanescu S.; Vasilache D.; Dinescu A.; Shanawani M.; Masotti D.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/710700
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