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A convex conformal circularly polarized dielectric resonator antenna array for wearable applications in X-band

Published online by Cambridge University Press:  04 December 2025

Sonal Sahu Open the ORCID record for Sonal Sahu [Opens in a new window] ,
Rishabh Kumar Baudh Open the ORCID record for Rishabh Kumar Baudh [Opens in a new window] ,
Manoj Singh Parihar  and
Dinesh Kumar Vishwakarma
Sonal Sahu*
Affiliation:
Department of Electronics and Communication Engineering, PDPM-IIITDM, Jabalpur, MP, India
Rishabh Kumar Baudh
Affiliation:
Department of Electronics and Communication Engineering, PDPM-IIITDM, Jabalpur, MP, India
Manoj Singh Parihar
Affiliation:
Department of Electrical and Electronics Engineering, ABV-IIITM, Gwalior, MP, India
Dinesh Kumar Vishwakarma
Affiliation:
Department of Electronics and Communication Engineering, PDPM-IIITDM, Jabalpur, MP, India
*
Corresponding author: Sonal Sahu; Email: 20pece05@iiitdmj.ac.in
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Abstract

In this article, a circularly polarized dielectric resonator antenna (DRA) array with conformal characteristics and improved specific absorption rate (SAR) has been proposed for X-band applications. The proposed structure has been fed through the corporate feed network which excites a radiating mode inside DRA, i.e., $TE_{1\delta1}$. This mode has been utilized to enhance the impedance bandwidth which is below −10 dB for both the E- and H-plane so as to meet the requirements of next-generation defense communication and low-cost satellite systems. To generate the axial ratio (AR), the extended off-set feed has been employed to provide the required 90$^{\circ}$ phase shift. Further, in order to enhance the gain and reduce the SAR, an electromagnetic band gap structure has been used as a reflector. Furthermore, multiple arrays have been introduced to extend the coverage area through beam-forming. The proposed design has been fabricated for the experimental validation. The measured IBW and ARBW is 34.74% and 12.2%, respectively. The gain is 10.1 dBic throughout the band of operation along with the radiation efficiency above 85% in various bending conditions. The SAR is much below the permissible limit of 1.6 W/kg. Thus, the proposed array is compact, and it clearly achieves a smaller footprint, better IBW, ARBW and a low SAR with potential prospect for X-band purposes.

Keywords

arraybeam formingcircular polarizationdefence communicationDRAEBGoff-set feed and compactSARsatellite system

Information

Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 9
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Copyright
© The Author(s), 2025. Published by Cambridge University Press in association with The European Microwave Association

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