Design and Analysis of a RFID Reader Microstrip Array Antenna for IoT Applications in Smart Cities

Design and Analysis of a RFID Reader Microstrip Array Antenna for IoT Applications in Smart Cities

Omaima Benkhadda, Mohamed Saih, kebir Chaji, Abdelati Reha
Copyright: © 2022 |Pages: 11
DOI: 10.4018/IJWLTT.20220901.oa3
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Abstract

This paper presents the design of 2*1 and 4*1 RFID reader microstrip array antenna at 2.4GHz for the Internet of things (IoT) networks which are Zigbee, Bluetooth and WIFI. The proposed antenna is composed of identical circular shapes radiating patches printed in FR4 substrate. The dielectric constant εr and substrate thickness h are 4.4 and 1.6mm, respectively. The 2*1 and 4*1 array antennas present a gain improvement of 27.3% and 61.9%, respectively. The single,2*1 and 4*1 array antennas were performed with CADFEKO.
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Single Microstrip Circular Patch Antenna Design

The proposed microstrip antenna has a circular shape that operates at 2.4GHz. It is etched on one side of a standard FR4 dielectric substrate. The substrate material has a compact dimension of Ws × Ls×h. A 50 Ω microstrip line with an inset of y0 is used to excite the radiating circular patch. The radius of the circular microstrip patch was calculated by (1) (Balanis, 2005):

IJWLTT.20220901.oa3.m01
(1)

Where:

εr: dielectric constant of the substrate.

fr: the resonance frequency

By applying the previous equation and after optimization with CADFEKO, the radius of the circular patch antenna with a resonant frequency of 2.4GHz is a= 17.3mm.

Figure 1 presents the designed basic patch antenna structure and table.1 illustrates the dimensions of the patch antenna.

Figure 1.

geometry of the designed basic antenna

IJWLTT.20220901.oa3.f01

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