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16-element CPW Series Fed Millimeter-wave Hexagonal Array Antenna for 5G Femtocell Applications

Published online by Cambridge University Press:  13 August 2021

Harini V. Open the ORCID record for Harini V. [Opens in a new window] ,
Sairam M. V. S.  and
Madhu R.
Harini V.*
Affiliation:
Department of ECE, JNTUK Kakinada, Kakinada 533003, Andhra Pradesh, India Department of ECE, Vardhaman College of Engineering, Shamshabad, Hyderabad 501218, Telangana, India
Sairam M. V. S.
Affiliation:
Department of ECE, Gayatri Vidya Parishad College of Engineering (Autonomous), Visakhapatnam 530048, Andhra Pradesh, India
Madhu R.
Affiliation:
Department of ECE, JNTUK Kakinada, Kakinada 533003, Andhra Pradesh, India
*
Author for correspondence: Harini V., E-mail: harini040@gmail.com
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Abstract

A 16-element coplanar waveguide series fed hexagonal array antenna is proposed at millimeter-wave frequency range. In this paper, the analysis is initiated from a single-element hexagonal patch then extended to 1×2 array, 1×4 array, and 4×4 series fed hexagonal patch array antennas. The idea behind this design is to improve fractional bandwidth stage-wise with improved gain maintaining constant efficiency with all the structures. The 16-element array antenna is fabricated on Rogers RT Duriod 5880™ substrate with ɛr = 2.2 and 0.508 mm thickness. This array antenna exhibits low return loss at 28 GHz with a reflection coefficient value of −31.02 dB including almost 102% radiation efficiency and attained a maximum gain value of 8.98 dBi. The results are quite comparable with simulated 4×4 array antenna using the HFSS tool. The size of the proposed antenna is quite small which will be best suited for 5 G Femtobase stations to provide indoor communications at millimeter-wave frequencies.

Keywords

Antenna arrayCPW series fedFemtobase stationsfractional bandwidthmillimeter-wave frequencies
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 14 , Issue 8 , October 2022 , pp. 955 - 969
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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