Long-Distance Passive Sensing Tag Design Based on Multi-Source Energy Harvesting and Reflection Amplification

Area of Science:

• Electrical Engineering
• Wireless Communication
• Internet of Things (IoT)

Background:

• Wireless sensor networks face limitations due to battery dependence, including cost, size, and lifespan.
• Existing passive sensor tags have short communication ranges, hindering their application in evolving IoT ecosystems.

Purpose of the Study:

• To develop a long-distance passive Radio Frequency Identification (RFID) sensing tag.
• To overcome the range limitations of current passive sensor tags for enhanced Internet of Things (IoT) applications.

Main Methods:

• Integration of multi-source energy harvesting to improve tag receiving sensitivity.
• Incorporation of reflection amplification to boost tag reflection power.
• Combined techniques to significantly expand the overall communication range of the RFID tag.

Main Results:

• Achieved a tag receiving sensitivity of -45 dBm.
• Demonstrated a reflection gain of 44 dB.
• Extended the communication distance to an impressive 96 meters.

Conclusions:

• The developed long-distance passive RFID sensing tag effectively addresses the range limitations of battery-powered wireless sensors.
• The integration of multi-source energy harvesting and reflection amplification offers a viable solution for robust IoT communication.
• The enhanced communication range and sensitivity pave the way for more widespread and effective IoT deployments.