title: Design and Experimental Evaluation of Modified Square Loop Feeding for UHF RFID Tags.
abstract: This paper addresses the performance evaluation of a modified square loop antenna design for UHF RFID applications that is excited through a narrow feed line connected to a square loop, an impedance matching network. The square loop dimensions are modified to reach a conjugate impedance matching. A gap is fixed between the feed-lines to link the chip. To achieve impedance matching, the structures of the feed-line are optimized accordingly. In addition, the antenna consists of a straightforward geometry. An 11.9-meter maximum read range is achieved using a compact size of 80 × 44 mm2 and 3.2 W for the effective isotropic radiated power. Additional findings reveal that the proposed tag antenna is able to provide a stable resonance response in the near field of a large metallic surface.
authors.affiliation: Department of Electrical Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, Malaysia.
authors.forename: Md
authors.initials: M
authors.lastname: Rokunuzzaman
authors.affiliation: Department of Electrical Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, Malaysia.
authors.forename: Mohammad Tariqul
authors.initials: MT
authors.lastname: Islam
authors.affiliation: School of Information Technology, Faculty of Information Science and Technology, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, Malaysia.
authors.forename: Haslina
authors.initials: H
authors.lastname: Arshad
authors.affiliation: Department of Electrical Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, Malaysia.
authors.forename: Mandeep
authors.initials: M
authors.lastname: Jit Singh
authors.affiliation: Department of Electrical Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, Malaysia.
authors.forename: Norbahiah
authors.initials: N
authors.lastname: Misran
mesh_terms: D017097:Electric Impedance; D004867:Equipment Design; D057233:Radio Frequency Identification Device