A New Low Power Bi-Stable RF-MEMS Based Energy Harvester for NOMA Driven Industrial Internet of Things (IIoT)

The NOMA driven industrial Internet of Things (IIOT) is considered now as one of the emerging areas of internet of things. There are several applications domain of Industrial Internet of things. In the upcoming smart and secure societies, a large portion of infrastructure is relied on Industrial Control System (ICS). Among all the energy sector is perhaps the most demanding one on the use of IOT based control systems for the potential and explicit applications like smart grid, Intelligent Transportation systems, e-health etc. To achieve the mentioned applications in IIOT at low energy, different methods have been proposed for energy harvested industrial control systems. Among them RF energy harvesting techniques have been thoroughly researched and studied. Unfortunately, RF energy harvesting has severe drawback of consuming enough energy particularly at the switching side. To overcome the drawback, we have proposed a novel method of design of a Bi-stable MEMS RF switch (Bimorph clamped) for RF energy harvesting in industrial informatics and automation. The proposed system has been designed and simulated using Comsol Multiphysics and ef43ws succeeds between 1.5-3.0 V output voltage for operating frequency at 1.9 and 2.45 GHz from RF input power at -20 dBm with revealing approximately 100% improvement over other existing designs.