A New Design of a Microstrip Antenna with Modified Ground for RFID Applications

Abstract

A new dual-band monopole microstrip antenna with modified ground structure designed for Radio Frequency Identification (RFID) readers is proposed. The rectangular slots inserted in the ground plan permit to achieve dual frequencies and also provide a broadband operation at high frequency. The entire area of the proposed antenna is 33×35 mm 2 and mounted on an FR4 substrate with dielectric permittivity constant 4.4, thickness of 1.6 mm and loss tangent of 0.025 and fed by a 50 Ohm microstrip line. This antenna has been analyzed and simulated to cover the RFID at 2.45/5.8 GHz. The simulation has been carried out by using two electromagnetic solvers ADS and CST Microwave Studio. By fabricating and measuring the performances of the prototype of the proposed optimal antenna, experimental results show that the dual operating bands excited with-10dB return-loss bandwidths of about 70 MHz centered at 2.45 GHz and of about 490 MHz centered at 5.8 GHz were obtained.

Design and Fabrication of a Miniature and Compact Tri-band Antenna Using CTSRR Metamaterial and DGS Methods for RFID and WiMAX Applications

“…Traceability and object tracking are one of the most important applications of RFID technology by replacing barcodes with RFID tags or adding barcodes to these tags to achieve many advantages such as ease of reading, long read range and improved data capacity [3]. An RFID system consists essentially of a Tag, which is also composed of antenna for communication, a circuit for storing and processing, RFID reader transmits a radio frequency interrogation signal through the reader antenna and receives the backscattered signal from the antenna of the in-field transponder which contains the stored contents in the internal memory of the tag [4], a host for storage of information collected from tag and treaties. An RFID system can be classified into active RFID system in which an RFID tag has a battery pack and a passive system in which an RFID tag has no battery pack but has the energy to operate the incident wave of reader [5].…”