International Journal on Advanced Science, Engineering and Information Technology, Vol. 9 (2019) No. 2, List of accepted papers, DOI:10.18517/ijaseit.9.2.6506

Design of Energy Harvester Module with a Low RF Power Input for UHF RFID Tag

Trio Adiono, Ula Grace Rosyidah, Suksmandhira Harimurti, Amy Hamidah Salman

Abstract

UHF RFID system is designed to be able to work at long distance range, typically in the range of 1-4 m. As a result, the RF signal power received at the RFID Tag is very low, typically -10 dBm. In this paper, an energy harvester module for UHF RFID Tag, which is able to work a low RF input signal power, is designed. The module is able to work to operate at given RF input power as low as -10 dBm or equal to 100 mV of induced voltage. To obtain such a performance, a modified and optimized rectifier using a Dynamic Vth Cancellation technique, which is able to produce an efficient and a high output voltage, is designed. Additionally, bandgap reference and voltage regulator circuits are also designed to obtain a stable DC power supply which is independent of power supply and temperature variation. All the circuits are designed on Silterra 130nm CMOS technology. This CMOS technology allows us to design the transistor to have a threshold voltage of 0.1 V, which is very suitable for the target application of UHF RFID.

Keywords:

UHF RFID; energy harvesting; dynamic Vth cancellation rectifier; bandgap reference; voltage regulator.

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