Design, Realization and Measurements of Compact Dual-band CPW-fed Patch Antenna for 2.45/5.80 GHz RFID Applications

Abstract

In this paper, a Coplanar Wave Guide (CPW)-Fed microstrip octagonal patch antenna for RFID Applications is proposed. The studied structure is suitable for 2.45/5.80 GHz applications. The octagonal shape is obtained by making triangular cuts in the four angles of the rectangular microstrip patch antenna; in addition the using of CPW-Fed allows obtaining UWB characteristics in the higher band. The miniaturization in the antenna size for lower band is achieved by introducing an inverted E slot in the radiating element. The proposed antenna is designed on a single and a small substrate board of dimensions 29.5×29.5×1.6 mm3. Moreover the miniaturized antenna has a good impedance matching and an enhanced gain. The simulation analysis was performed using the CADFEKO software, a Method of Moment (MoM) based solver, and a prototype of this antenna was fabricated, good agreement with the simulation providing validation of the design procedure. The measurements are done with ANRITSU MS2026C Vectorial Network Analyzer. Keyword: Copyright © 2018 Institute of Advanced Engineering and Science.All rights reserved. Corresponding Author:Mohamed Tarbouch, RITM Laboratory, CED Engineering Sciences, Ecole Supérieure de Technologie, Hassan II University of Casablanca, Morocco. Email: mtarbouch@gmail.com INTRODUCTION"RFID stands for Radio Frequency Identification, a term that describes any system of identification wherein an electronic device that uses radio frequency or magnetic field variations to communicate is attached to an item" [1].The two most talked-about components of an RFID system are the tag, which is the identification device attached to the item we want to track, and the reader, which is a device that can recognize the presence of RFID tags and read the information stored on them. The reader can then inform another system about the presence of the tagged items. The system with which the reader communicates usually runs software that stands between readers and applications. This software is called RFID middleware [1].In a typical RFID system [2], passive tags are attached to an object such as goods, vehicles, humans, animals, and shipments, while a vertical/circular polarization antenna is connected to the RFID reader. The RFID reader and tag can radio-communicate with each other using a number of different frequencies, and currently most RFID systems use unlicensed spectrum. The common frequencies used are low frequency (125 KHz), high frequency (13.56 MHz), ultra high frequency (860-960MHz/2.45GHz), and microwave frequency (3.6/3.9/5.8/5.9/8.2GHZ [3]). The typical RFID readers are able to read (or detect) the tags of only

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“…Many organizations, hospitals, and universities have adopted the RFID technology over other identification technologies such as barcoding, biometric, and other identification technologies due to its low cost, small size, easy maintenance, and the ability to identify objects without requiring light of sight [6,7]. In addition, RFID can be implemented in harsh environments such as dirt and damage, providing the ability of auto-tracking [8]. RFID can identify tags without the need for direct contact where it can identify tags for a specific object within couple feet, tag reusability, and the ability to read multiple tags simultaneously [9,10].…”

A rectangular CSRR based microstrip UHF reader patch antenna for RFID applications

“…Therefore, reader antenna is an important unit as they are integral part of RFID systems. Among the applications, ultra-high frequency (UHF) radio frequency identification (RFID) systems receives a lot of attention because of their potential in item-level tagging such as sensitive products tracking, pharmaceutical logistics, transport and medical products (blood, medicines, vaccines), bio-sensing applications, and so on [3][4][5][6][7][8][9]. UHF band has always been the pursuit of RFID systems, because the frequency band varies from country to country.…”

Novel Printed H-Antenna with Slot and Parasitic Element for RFID Systems

“…The most common are microstrip line excitation [5], [6], coaxial cable [7]- [9], by opening coupling [10], [11] or by proximity coupling [12]. The patch-H antenna is widely used, notably for Bluetooth [13], WLAN [14]- [16], wireless communications [16], [17], or broadband applications [18], [19]. In this work, we have dimensioned a patch-H antenna in the UHF band for RFID applications.…”