Research Area:  Internet of Things

Abstract:

In this article, a novel batteryless wireless sensor design is proposed and demonstrated. The proposed passive wireless sensor node integrates a ultrahigh-frequency (UHF) radio-frequency identification (RFID) chip, a filter, and a reactive sensor to enable the reading of environmental conditions wirelessly, without increasing the complexity of a typical RFID chip and substantial loss of the read range. The sensor changes the phase of the reflected RFID signal based on the sensed parameter; whereas, the filter helps in resolving any phase ambiguity that may arise due to the placement of the node at different distances. The phase change is detected at the reader using a noncoherent IQ demodulator. The design can easily integrate any type of sensors, such as temperature, humidity, and water-level sensor. A flood sensor and a temperature sensor were used to demonstrate the performance of the proposed design in a home and office environment.

Keywords:  

Author(s) Name:  Nabil Khalid; Rashid Mirzavand; Hossein Saghlatoon; Mohammad Mahdi Honari; Ashwin K. Iyer; Pedram Mousavi

Publisher name:  IEEE

DOI:   10.1109/JIOT.2021.3095136

Volume Information:  Volume: 9, Issue: 4, Feb.15, 15 2022, Page(s): 2960 - 2972

Paper Link:   https://ieeexplore.ieee.org/abstract/document/9475506