Compact and Innovative Microstrip Patch Antenna with Enhanced Microwave Circuit Performance for RFID Applications

Authors Md. Najumunnisa1, A.S.C.S. Sastry1, B.T.P. Madhav1, Tanvir Islam2 , Sudipta Das3

1 Department of E.C.E., Koneru Lakshmaiah Education Foundation, India

2 Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA

3 Department of Electronics and Communication Engineering, IMPS College of Engineering and Technology, Malda, WB, India

Issue Volume 15, Year 2023, Number 5
Dates Received 29 July 2023; revised manuscript received 18 October 2023; published online 30 October 2023
Citation Md. Najumunnisa, A.S.C.S. Sastry, B.T.P. Madhav, et al., J. Nano- Electron. Phys. 15 No 5, 05024 (2023)
PACS Number(s) 84.40.Ba
Keywords Antenna (6) , Bandwidth, Gain (9) , Microstrip patch (2) , Radiation Pattern, Radio-Frequency Identification.

This research article introduces a microstrip patch antenna characterized by its compact dimensions of 60 x 40 x 0.8 mm³ and is minimalistic. This design not only enhances several microwave circuit attributes, such as achieving an optimal gain but also offers a desirable bandwidth. It is designed using low cost FR4 material with a thickness of 0.8 mm and a relative dielectric constant (εr) of 4.4 to operate effectively within the frequency range spanning from 0.7 – 1.1 GHz. The ground plane is located beneath the substrate. The proposed antenna design demonstrates its suitability for lower frequencies due to its compact size. Simulation results validate the appropriateness of the antenna model. When compared to conventional patch antennas, the proposed design exhibits improved performance parameters, including a lower reflection coefficient, higher gain, and a lower VSWR. These simulations have been conducted using the CST software, enabling a comprehensive comparative analysis with existing antenna designs. The proposed antenna achieves outstanding impedance matching, indicated by |S11| measuring below – 10 dB, with a VSWR of less than 2 for a broad range of 0.7 to 1.1 GHz. Furthermore, it exhibits a peak gain of 4.49 dBi precisely at 0.915 GHz. Given its resonance at this frequency, the antenna proves to be an optimal selection for RFID applications, providing compatibility, efficiency, and adaptability to cater to a broad spectrum of RFID application scenarios.

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