A Novel Small Size CPW-Fed Slot Antenna with Circular Polarization for 5G Application

Seyyedeh F. Seyyedrezaei | Sajad Mohammad-Ali-Nezhad | Hamidreza Hassani | Maryam Farahani

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URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=148006
Date :  2020/11/06
Publish in :    Progress In Electromagnetics Research C
DOI :  https://doi.org/10.2528/PIERC20080705

Keywords :slot antenna, circular polarization

Abstract :

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A novel CPW-fed circular polarized slot printed monopole antenna for 5G application is presented. The proposed slot monopole antenna occupies a small area of 0.23λ o and the wavelength has been obtained for the center frequency of 3.4 GHz to 3.8 GHz range. First, two square slots are inserted on either side of the feed line, and to provide two orthogonal electric fields, a spiral stub is embedded in one of the slots. In order to improve the axial ratio bandwidth of the proposed antenna, it is possible to etch another spiral stub on the other side of the feed line. The proposed antenna provides circular polarized radiation such that the reflection coefficient bandwidth (below −10 dB) is about 1.4 GHz (from 2.9 GHz to 4.3 GHz) or 38.89, and the axial ratio bandwidth below 3 dB is about 400 MHz, from 3.4 GHz to 3.8 GHz. This is 11.1 at center frequency of 3.6 GHz. This antenna covers the useful frequency bandwidth for 5G application. Simulation and measurement results are presented.