Design of High Gain Microstrip Patch Reader Array Antenna with Parasitic Elements for UHF RFID Application

Abstract

Design of a microstrip patch UHF reader parasitic array antenna for RFID (Radio Frequency Identification) applications is proposed, in which the design patches antenna realized by loading two truncated at the corner of the ordinary rectangular patch antenna. The patch was sorted in a 2 x 2 array configuration, meanwhile the feed network was constructed by coaxial feed concept. The parasitic elements are added on the same layer of the substrate and at the right and left side of the every patch. The physical parameters of the novel structure are simulated and optimized by using commercial computer simulation technology (CST) simulation packages. The simulation results show the high gain antenna is achieved which is 11.15 dBi. The measured results of the return losses and the radiation pattern achieved a good agreement with the simulated results.

Read Range Performance of Microstrip Patch Reader Antenna for UHF RFID Applications

“…1 In order to determine patch antenna to be nurtured by 50 ohm, microstrip feed line was used for line impedance (Zo). Microstrip feed line such as length (L f ) and width (W f ) are calculated using equations [3] 8and 9:-Feed length, (8) Feed width, (9) where his the substrate thickness and Zo is the line impedance Table I shows the optimization result of microstrip patch reader antenna operating at921 MHz.…”

“…Generally, the size of high gain antennas is bigger than the antenna that has low gain. Therefore, the microstrip antenna was used to design reader antenna due to their attractive features such as light weight, inexpensive and easy to fabricate [9] [8].…”

“…Patch and ground of the antenna used PEC material with the thickness of 0.035mm. There are equations to calculate L g , W g , L, W, W f and L f which are given by equations (1)-(7) below[3]:-Patch width,(1) wherefois the operating frequency, Ɛr is thedielectric constant and cis thespeed of light (3x10 8 ) m/s Effective dielectric constant,…”

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

“…UHF band has always been the pursuit of RFID systems, because the frequency band varies from country to country. In Malaysia, the permitted operating frequency is between 919 MHz -923 MHz for UHF band [10,11].…”