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Independently tunable metamaterial inspired compact triband dual-sense circularly polarized antenna

Published online by Cambridge University Press:  13 December 2024

Vinaya Kumar Sugganapalya Rajanna Open the ORCID record for Vinaya Kumar Sugganapalya Rajanna [Opens in a new window] ,
T. Venkatesh ,
Puneeth Kumar Tharehalli Rajanna Open the ORCID record for Puneeth Kumar Tharehalli Rajanna [Opens in a new window]  and
Shambulinga Mudukavvanavar
Vinaya Kumar Sugganapalya Rajanna*
Affiliation:
Electrical and Electronics Engineering, Ghousia College of Engineering, Ramanagara, Karnataka, 590018 India India Affiliated to Visvesvaraya Technological University, Belgaum, Karnataka, 590018
T. Venkatesh
Affiliation:
Computer Science and Engineering, Ghousia College of Engineering, Ramanagara, Karnataka, India
Puneeth Kumar Tharehalli Rajanna
Affiliation:
Electronics and Telecommunication Engineering, Siddaganga Institute of Technology, Tumkur, Karnataka, India
Shambulinga Mudukavvanavar
Affiliation:
Electronics and Telecommunication Engineering, RV College of Engineering, Bangalore, Karnataka, India
*
Corresponding author: Vinaya Kumar Sugganapalya Rajanna; Email: srvinayssit@gmail.com
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Abstract

In this article, a dual-sense triband circularly polarized modified slot antenna loaded with metamaterial structures such as split-ring resonator and cross strips is proposed. The first resonant frequency is generated using the modified square slot which produces the two degenerative modes required to achieve circular polarization (CP). The corners of slot antenna are extended to obtain the orthogonal modes. The second resonant band is obtained using the single split-ring resonator. Two micro-splits in Split Ring Resonator (SRR) orthogonal to each other produces CP due to electric field generated by the micro-splits. The third resonance band is obtained due to loading of cross strips. The orthogonal phase is adjusted by varying the length of cross strips, so that the CP is achieved. All resonance bands are tuned independently. The measured impedance bandwidth of 31.68%, 4.55%, and 8.6% is obtained in first, second, and third bands respectively. The axial ratio bandwidth of 13.04%, 2.7%, 8.6% and peak gain of 3.8 dBic, 3.9 dBic, 3.7 dBic are obtained respectively. The simulated radiation efficiencies of above 80% is achieved in all bands. The left-hand CP is obtained in first two band as co-polarization and right-hand CP is obtained at the third band as co-polarization with respect to cross-polarization radiation. The cross-polarization of minimum −10 dB is obtained in all three bands. The proposed design is well suitable for the Bluetooth, n78 and n79 5G applications.

Keywords

Slot antennaaxial ratiocircular polarizationsplit ring resonator
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 17 , Issue 1 , February 2025 , pp. 104 - 112
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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