Design of a small passive UHF anti-metal label antenna

Abstract

This paper designs a UHF band and small passive anti-metal RFID electronic tag antenna. On the basis of one end port enclosed small micro-strip antenna, the substrate uses dielectric constant in 22 of the microwave dielectric ceramic to further decrease the size of the antenna. Insert-fed is adopted，in which one end grounds through short-circuit patch，and the other end of the radiation patch loads short-circuit patch to redize broadband. Using HFSS simulation software for antenna design, the size of the antenna is about 32 mm×24 mm×4 mm, which is placed on a 200 mm×200 mm metal plate. In the working band of 860～960 MHz, S11 is less than -15 dB, impedance matching is excellent, and the reading distance of the simulation of MATLAB is about 7 m. The overall design of the tag antenna meets the design requirements of miniaturization, anti-metal, broadband, and low cost.

Keywords

• radio frequency identification
• anti-metal
• tag antenna
• miniaturization