Enhancing the Axial Ratio Bandwidth of Circularly Polarized Open Ground Slot CPW-Fed Antenna for Multiband Wireless Communications
Sandeep Kumar Singh, Tripurari Sharan and Arvind Kumar Singh
Abstract
This article presents a new structure of coplanar waveguide (CPW) antenna to enhance the performance by using optimal electrical dimensions. A circularly polarized (CP) broadband open-ground slot antenna has been proposed and analyzed in this work. It resembles a cross-shaped CPW feed structure that is placed in the middle of the square slot antenna. The overall size of the antenna is 0.66λc × 0.66λc × 0.01λc at 4 GHz (where λc represents the wavelength corresponding to center frequency (fc) of the 3-dB CP bandwidth). The antenna is fabricated on the same plane of an FR4 microwave dielectric substrate. Broadband CP operation is achieved by embedding two-square ring slits on the ground plane. Also, to obtain wider impedance bandwidth (IBW) and axial-ratio bandwidth (ARBW), a cross-shaped tuning stub feed line strip and an open slot in the ground plane are used. The peak gain of the proposed antenna is about 5.7 dBi at 3.5 GHz. The results are compared with the reported works; the proposed structure provides a larger ARBW with the same dielectric substrate and comparable size.
Publication details
Received: 24 Jun 2021
Revised: 22 Oct 2021
Accepted: 26 Oct 2021
Published online: 27 Oct 2021
Article type:
Research Paper
DOI:
10.30919/es8d557
Volume:
17
Page:
274-284
Citation:
Engineered Science, 2022, 17, 274-284
Permissions:
Copyright
Number of downloads:
3166
Citation Information:
18
Description:
Enhanced ARBW open ground slot CP antenna for multiband wireless communication (IMT, WiMAX and WLAN)....
Enhanced ARBW open ground slot CP antenna for multiband wireless communication (IMT, WiMAX and WLAN) is designed, fabricated and tested.
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