Design of RFID antenna by using a patch antenna

Abstract

In 21st century, Radio Frequency Identification (RFID) is very significant in many fields. RFID system can apply on the library book system, logistic control, inventory management. The wireless data transfer between reader and tag is more common rather than mechanical contact in automatic identification systems. Although there are quite many RFID designs in market, the designs mention below have their own features. In this report, it introduces an RFID tag with inductive feed. One of the main characteristic of this design is the platform tolerant. There is a ground plane under the design so it is independent of the surface mount. Moreover, the impedance of RFID tag is measured by using Network- analyzer. The method will be illuminated in this report. The return loss, differential radar cross section, impedance, read range, radiation pattern can obtain in this project. Also, there are different designs on two materials: FR-4 ,Wangling and compare both performance in this project. The proposed antennas were designed and simulated by using Zealand IE3D software.