Compact Meandered Folded-Dipole RFID Tag Antenna for Dual Band Operation in UHF Range
- PDF / 2,398,874 Bytes
- 16 Pages / 439.37 x 666.142 pts Page_size
- 5 Downloads / 259 Views
Compact Meandered Folded‑Dipole RFID Tag Antenna for Dual Band Operation in UHF Range Aarti Bansal1 · Surbhi Sharma1 · Rajesh Khanna1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract A meandered tag antenna is proposed for dual band operation in UHF (Ultra High Frequency) range at f1 = 866 MHz and f2 = 912 MHz. Initially, the proposed tag consists of folded dipole configuration with extended meandered arms to achieve single resonating band. The inverted L-shaped stub is embedded at the lower arm of the folded dipole to introduce additional resonance and realize the dual band operation at desired resonant frequencies. The proposed tag’s impedance is optimised to match conjugately to the RFID IC (Alien Higgs-4). The proposed dual-band tag is designed and simulated using CST microwave studio. The tag prototype is fabricated and is experimentally characterised to verify its impedance matching with respect to the employed RFID IC. The read range performance of the fabricated tag prototype is measured experimentally by placing the proposed tag on different type of objects like wood, fibre, plastic etc. validating its environment tolerance capability. The proposed tag is found to perform well in all the presented scenarios. The proposed tag is compact with volumetric size of dimensions 1920 mm3 and exhibits measured read range of 5.5 m and 5.8 m at 866 MHz and 912 MHz. Keywords Folded dipole · Dual-band RFID (radio frequency identification) tag · Meandering · Differential-impedance · Read range
1 Introduction Radio frequency identification (RFID) technique has been widely implemented across the world owing to have capability to identify and track objects wirelessly using radio frequency signals. Different applications making use of RFID technology are access control, automotive security, localization, transport systems, healthcare, logistics system and many more [1]. A RFID system basically comprises of two components i.e. reader and a tag along with a computer system that is implanted to process the database related to the object. RFID tag embedded objects are intended to report information related to their identity, location and environmental conditions through RF signal to the * Aarti Bansal [email protected] 1
Department of Electronics and Communication Engineering, Thapar Institute of Engineering and Technology, Patiala, Punjab 147004, India
13
Vol.:(0123456789)
A. Bansal et al.
reader. Further, the RFID tag antenna has a microchip connected to it for the storage of information of objects. The RFID tag utilizes power from the interrogatory signal to respond the reader. This received power energises the passive tag thereby activates the microchip. The microchip is activated specifically when the received power level increases above the minimum threshold turn on power required by it. As the impedance of the microchip is capacitive, thus antenna impedance must be designed inductive so as to maximize the power transfer from the tag antenna to the chip and hence the
Data Loading...
