Title: Circularly polarised compact square dielectric resonator antenna for web applications

Authors: Madhusmita C. Sahoo; Ashwin Patani; Nitinkumar Jivarajbhai Bathani

Addresses: Electronics and Communication, Indus University, Rancharda, Ahmedabad, Gujarat 382115, India ' Electronics and Communication, Indus University, Rancharda, Ahmedabad, Gujarat 382115, India ' Government Engineering College, Modasa, Gujarat 383315, India

Abstract: The dielectric resonator antenna (DRA) is utilised for ultra wide band (UWB) applications due to low conducting losses, better flexibility and better radiation efficiency. However, achieving compact geometry with circular polarisation (CP) while suppressing interference from existing wireless services remains a challenge. Moreover, mutual coupling between ports in multi-port UWB DRAs can significantly degrade performance. Considering these, this work presents a CP-based square DRA (SDRA) for UWB applications with the dimension of 10 mm × 10 mm × 0.508 mm. This design achieves a triple notch of 3.2-3.9 GHz (Wi-MAX), 4-6 GHz (WLAN) and 8-12 GHz (X-band) applications. The antenna is implemented on an FR4 substrate and incorporates a defected ground structure (DGS) to reduce mutual coupling between the two ports. Then, a microstrip feed line is provided, and the parasitic patch is placed between the two ports for better reflection coefficient for UWB applications. The proposed design achieves gains of 13.3, 2.7, and 22 dBic with corresponding VSWR values of 1.10, 1.31 and 1.26 for the three respective notched bands.

Keywords: dielectric resonator antenna; DRA; ultra wide band; UWB; circular polarisation; triple notches; parasitic patch; defected ground structure.

DOI: 10.1504/IJESMS.2026.153731

International Journal of Engineering Systems Modelling and Simulation, 2026 Vol.17 No.3, pp.148 - 158

Received: 11 Nov 2024
Accepted: 17 Jun 2025
Published online: 22 May 2026 *

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