An Enhanced Gain Dual-Polarized Dielectric Resonator Antenna Array with High Isolation for C-Band Applications

ABSTRACT

This article presents the design and performance analysis of a high gain dual-polarized two-element cylindrical dielectric resonator antenna (DRA) array excited by two orthogonally placed H-shaped apertures. The antenna is operated in dual linear polarized mode by exciting TM₁₁₀ (HEM₁₁) mode in two DRAs using aperture coupling. The proposed antenna has a −10 dB impedance bandwidth of 9.52% (6.0–6.6 GHz) with isolation more than 40 dB among the two ports. Realization of gain enhancement and high isolation are accomplished by simultaneously exciting two DR elements using a pair of wideband Wilkinson's power divider placed on the bottom side of the substrate. The measured gain of the proposed antenna for both the ports is found to be 12.5 dB with a front to back ratio of 16 dB. The antenna has an overall radiation efficiency of 94% and symmetrical radiation patterns with co-polarization levels 40 dB higher than the cross-polarization in both the principal planes (XY and XZ) of bore-sight direction.

KEYWORDS:

• C-band
• Dielectric resonator antenna
• Dual linear polarization
• Isolation
• SAR

ACKNOWLEDGMENTS

The first author would like to thank Mr Ayaskanta Panigrahi for using some parts of his MS thesis work in this article.

Additional information

Notes on contributors

Biswajit Dwivedy

Biswajit Dwivedy received his BTech degree in Electronics and Telecommunication Engineering from Biju Patnaik University of Technology (BPUT), Odisha, India in the year 2010 and MTech degree from VSSUT Burla, Odisha in the year 2013. He is currently working as a PhD degree scholar in Microwave and Antenna Design Laboratory of the Department of Electronics and Communication Engineering, National Institute of Technology Rourkela, India. His current research interest includes microstrip antennas, microwave devices, dielectric resonator antennas, reconfigurable antennas and systems, etc. He is a student member of the IEEE.

E-mail: [email protected]

Ayaskanta Panigrahi

Ayaskanta Panigrahi was born in Bhadrakh, Odisha, India. He received his BTech degree in Electronics and Telecommunication Engineering from Biju Patnaik University of Technology, Odisha, India in the year 2009. He completed his MTech degree by research degree in Electronics and Communication Engineering, at the National Institute of Technology Rourkela, India in the year 2016. His current research areas are dielectric resonator antennas, dual-polarized dielectric resonator antenna arrays, wideband dielectric resonator antennas, etc.

E-mail: [email protected]

Santanu Kumar Behera

Santanu Kumar Behera received the BSc (Engg.) degree from UCE Burla, Sambalpur University in the year 1990, ME and PhD (Engg.) degrees from Jadavpur University in the year 2001 and 2008, respectively. He is presently working as an associate professor at the Department of Electronics and Communication Engineering, National Institute of Technology Rourkela, India. His current research interest includes planar antenna, dielectric resonator antenna, and reconfigurable planar antennas. Dr Behera is a Fellow of IETE (India), Fellow of the Institution of Engineers (India), and a senior member of the IEEE.

E-mail: [email protected]