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Design of Circularly Polarized Wideband Dielectric Resonator Antenna for Millimeter Wave Applications

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Abstract

As modern communication system shifts upward to the millimetre waveband due to the advantages of wider bandwidth and interference avoidance at lower frequency spectrum. It demands a high data rate of information exchange for millimetre wave applications. In this view Dielectric resonator antenna are preferred, as DRA’s are more efficient and have minimum losses compared to microstrip patch antennas. A substrate-Integrated dielectric resonator antenna is proposed using aperture coupling for millimeter wave applications. In contrast, the Dielectric resonator (DR) antenna (DRA) relies on the radiating mode of a DR which is purely made of dielectric. Due to the absence of surface waves and conductor losses, the efficiency of DRA can reach as high as over 90% even in mm-wave band. A wideband circularly polarised substrate-integrated dielectric resonator antenna (SIDRA) is proposed for millimetre wave applications and is simulated using HFSS software. The proposed SIDRA has two cylindrical dielectric resonators, an inner cylindrical dielectric resonator (DR), an outer ring DR and a substrate-integrated waveguide (SIW) cavity. In order to generate CP fields two rectangle slots of different lengths are used to form a cross-slot to feed the DRA at its bottom. The fundamental HEM11ẟ mode of inner DR and the higher order HEM12  + 1 mode of the overall DR is excited simultaneously at frequencies. The two degenerate modes provide wide impedance and axial ratio bandwidths. The directivity of the antenna is improved due to the surrounding SIW cavity as compared with the isolated one and achieves a maximum gain of 8dBic.

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Correspondence to Gayatri Chittimoju.

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Gayatri Chittimoju, Bosubabu Sambana, M. Rajana Babu J. Sindhu Ravali, Vamsi M, declare that they have no competing interests.

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This article is part of the topical collection “Enabling Innovative Computational Intelligence Technologies for IOT” guest edited by Omer Rana, Rajiv Misra, Alexander Pfeiffer, Luigi Troiano and Nishtha Kesswani.

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Chittimoju, G., Sambana, B., Ravali, J.S. et al. Design of Circularly Polarized Wideband Dielectric Resonator Antenna for Millimeter Wave Applications. SN COMPUT. SCI. 4, 585 (2023). https://doi.org/10.1007/s42979-023-02025-3

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  • DOI: https://doi.org/10.1007/s42979-023-02025-3

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