Design of UHF radio frequency identification metal tag antenna using T‐shaped slot

Abstract

New method for design and realizing multiband metamaterial is presented. For this purpose, resonator-based metamaterial is designed and investigated by both simulation and experiment with well agreement. By serially arranging the nonconcentric open loop metallic elements with different dimensions, the structure exhibits multipassbands related to the metamaterials' unique features.

Compact Metal Mountable Uhf Rfid Tag on a Barium Titanate Based Substrate

“…1 has been created considering a rather low directivity (D tag = 1.8 dBi) compared with the values reported for metal mountable tags [8][9][10][11], is that the aim of the present work is to develop a tag suitable for identification of small metallic objects. In this case, the potential improvement in tag antenna directivity due to an electrically large metal plate backing the tag antenna cannot be expected.…”

“…For example, 3.1-meter read range is achieved with a high impedance unit cell based tag with the size of 60 × 20 × 1.5 mm 3 [8], 3.4-meter read range is reported for a meandered patch-type tag antenna with the size of 83 × 35 × 0.8 mm 3 [9], a T-shaped slot antenna with size of 120 × 35 × 5.05 mm 3 has 14-meter read range [10], and 25-meter read range is obtained with a rectangular patch tag with an inductive feed network and size of 131 × 68 × 3.3 mm 3 [11]. An absolute comparison between these tags may not be justified, since the read ranges are reported on different conducting platforms and different tag ICs have been used.…”

Double Loop Inductive Feed Patch Antenna Design for Antimetal UHF RFID Tag

“…But in these EBG structure antennas, the nonplanar structures are still required. Apart from that, some metal-mountable tags based on antennas without a ground plane are proposed, but with slot structure and high-permittivity substrate material [17][18][19]. For the commercial solutions, some companies use the wave absorbing material between the dipole-like antenna and the metal surface, which will increase the cost of the label obviously.…”