A compact UHF RFID tag antenna for soil monitoring

• Main Authors: Ismail, Muhammad Zamani, Ripin, Nabilah, A. Rahim, Mohamad Kamal, Ahmad, Nur Azliza
• Format: Conference or Workshop Item
• Language: English
• Published: 2024
• Subjects: TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television
• Online Access: http://eprints.uthm.edu.my/11319/1/P16618_48263b83e8642b4757e7856672a5f915%2015.pdf; http://eprints.uthm.edu.my/11319/; http:\\10.1109/ISAP57493.2023.10388898

UHF RFID technology is currently being chosen to replace the existing soil monitoring system for smart agriculture. However, when attached to backing objects, the current RFID tag typically has a large footprint and a short read distance. Therefore, this paper introduces a compact tag antenna design comprising a slotted radiating patch connected to a ground plane via an inductive stub. The tag antenna is mounted on loamy soil for soil monitoring purposes. The proposed tag has a small size of only 48.2 � 48.2 mm, a power transmission coefficient of 0.99, and a longer theoretical read range of 9m.