Circularly Polarized Antenna for C and X-Band Applications using Characteristic Mode Analysis

International Journal of Electrical and Electronics Engineering

© 2023 by SSRG - IJEEE Journal

Volume 10 Issue 2

Year of Publication : 2023

Authors : Vamshi Kollipara, V. Siva Nagaraju, M. Krishnaiah, M. Thirupathi, A. Ushasree, Naluguru Udaya Kumar, Samineni Peddakrishna

10.14445/23488379/IJEEE-V10I2P118

How to Cite?

Vamshi Kollipara, V. Siva Nagaraju, M. Krishnaiah, M. Thirupathi, A. Ushasree, Naluguru Udaya Kumar, Samineni Peddakrishna, "Circularly Polarized Antenna for C and X-Band Applications using Characteristic Mode Analysis," SSRG International Journal of Electrical and Electronics Engineering, vol. 10,  no. 2, pp. 196-206, 2023. Crossref, https://doi.org/10.14445/23488379/IJEEE-V10I2P118

Abstract:

This article describes a coplanar waveguide (CPW) feed inverted L- strip slot antenna implementation along with characteristic mode analysis (CMA) to obtain circular polarization (CP) with broad bandwidth. The antenna design includes a microstrip feed annular ring patch and an inverted L-strip asymmetric square slot. The resonant and radiating behavior of the inverted L-strip with asymmetric square slot are analyzed using CMA for the first six characteristic modes (CMs) to attain CP. The annular ring microstrip-fed patch is then excited based on the CMs response to achieve broadband CP. To further assess the accuracy of the simulation results, a prototype is fabricated on a single-layered FR-4 substrate measuring 25×25 mm2 . Upon measurement, the antenna displays an S11 less than -10 dB of 59.6% (5.50 - 10.17 GHz) impedance bandwidth and 3dB circular polarization of 46.8% (5.98 - 9.64 GHz) axial ratio bandwidth. The proposed antenna's operating bandwidth may include the satellite and naval radar required for military applications.

Keywords:

Antenna, Broadband, Circular polarization, Characteristic modes, Characteristic mode analysis.

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