A RFID Tag Antenna for Wearable Application System in Microwave Frequency Band

Abstract

A RFID tag antenna for wearable application system in microwave frequency band is proposed and presented. The proposed RFID tag antenna is operated in the microwave frequency band of 1 to 12 GHz. Several numbers of the slot resonator are introduced that attached on jeans fabric as substrate material. The presence of the slot resonator also will be used to generate the unique identification or spectral signature of the RFID tag antenna. In real life, the monostatic radar system, which consists of the Vector Network Analyzer and a horn antenna is configured to test the RFID tag antenna. The performances of the proposed RFID tag antenna are evaluated based on their reflection coefficient, operating frequency, and surface current. The obtained results give a good agreement between the measurements and simulation.

Design of a Flexible T-Matched Feed UHF RFID Tag Antenna

“…The equivalent circuit tag antenna with T-match feed line is depicted in Figure 2 [17]. The input impedance of the proposed antenna in Figure 1, is given as [18] 𝑍 𝑎 = 𝑅 𝑎 + 𝑗𝑋 𝑎 = 𝑍 𝑡 + 𝑍 𝑐𝑡𝑝 + (2𝜋𝑓𝑀) 2 𝑍 𝑚 (1) where Zt is the T-match feeder impedance, Zctp is the impedance of the capacitive tip loading, Zm is the meandered line impedance and M is the inductive mutual coupling between the T-match feeder and radiating body including meandered line and capacitive tip loading. The transfer power coefficient,  is given by [19] :…”

“…Radiofrequency identification (RFID) has experienced progressive growth for the past two decades and is broadly implement in various sectors such as supply chain management, item label tagging, healthcare and military applications [1]- [4]. RFID is a well-known automated identification (auto-ID) technology that employs radiofrequency waves to track and identify objects automatically.…”