Architecture of Micro Energy Harvesting Using Hybrid Input of RF, Thermal and Vibration for Semi-Active RFID Tag

This research work presents a novel architecture of Hybrid Input Energy Harvester (HIEH) system for semi-active Radio Frequency Identification (RFID) tags.The proposed architecture consists of three input sources of energy which are radio frequency signal, thermal and vibration.The main purpose is to solve the semi-active RFID tags limited lifespan issues due to the need for batteries to power their circuitries.The focus will be on the rectifiers and DC-DC converter circuits with an ultra-low power design to ensure low power consumption in the system.The design architecture will be modelled and simulated using PSpice software, Verilog coding using Mentor Graphics and real-time verification using field-programmable gate array board before being implemented in a 0.13 µm CMOS technology.Our expectations of the results from this architecture are it can deliver 3.3 V of output voltage, 6.5 mW of output power and 90% of efficiency when all input sources are simultaneously harvested.The contribution of this work is it able to extend the lifetime of semi-active tag by supplying electrical energy continuously to the device.Thus, this will indirectly reduce the energy limitation problem, eliminate the dependency on batteries and make it possible to achieve a batteryless device.