Substrate Integrated Waveguide fed Wideband Circularly Polarised Antenna with Parasitic Patches

Murugeshwari Saravanakumar; Arvind Kumar; Singaravelu Raghawan

doi:10.14429/dsj.69.13049

Murugeshwari Saravanakumar National Institute of Technology, Trichy - 620 015
Arvind Kumar National Institute of Technology, Trichy - 620 015
Singaravelu Raghawan National Institute of Technology, Trichy - 620 015

DOI: https://doi.org/10.14429/dsj.69.13049

Keywords: parasitic patch, wideband antenna., Circularly polarised antennas, Substrate integrated waveguide

Abstract

In this study, a wideband circularly polarised (CP) antenna is developed and demonstrated. The antenna comprises of two-layered substrates, the top layer holds a driven patch and eight surrounding parasitic patches of similar dimensions, and substrate integrated waveguide (SIW) based feeding topology is designed at the bottom layer. The driven patch is excited through coupling mechanism using a cross-slot carved on the upper clad of the SIW. The corners of the driven patch are curtailed and arms of the coupling slot made unequal, which constructively generates the CP wave. Moreover, the proposed antenna is prototyped, and experimentally verified. The antenna shows measured impedance and axial-ratio (AR) bandwidths of 1.29 GHz (21 per cent) and 460 MHz (7.35 per cent), respectively, while maintaining the high gain of ~8 dBic over the operating CP region. This design aids the favorable characteristics such as light weight, wide impedance and (AR) bandwidths, high-gain as well as lenience of production, and integration.

Author Biographies

Murugeshwari Saravanakumar, National Institute of Technology, Trichy - 620 015

He is presently pursuing her PhD in the Department of Electronics and Communication Engineering, National Institute of Technology, Tiruchirappalli. She has published two paper in the international conferences. Her research interests are RF and microwave integrated circuits.
Her contribution in proposed is to helped in the fabrication and measurement of the current work.

Arvind Kumar, National Institute of Technology, Trichy - 620 015

He received Master’s in Electronics Engineering from Pondicherry Central University, India. Currently pursuing his PhD in the Department of Electronics and Communication Engineering, National Institute of Technology, Tiruchirappalli.
His contribution to the current study is to design, analysis and fabrication.

Singaravelu Raghawan, National Institute of Technology, Trichy - 620 015

He received his Master’s in Microwave Engineering from College of Engineering, Trivandrum and PhD from IIT. Delhi, India. Currently working as Senior Professor at National Institute of Technology, Tiruchirappalli. His research interest includes : Microwave/millimeter-wave circuits and devices, microwave integrated circuits, antennas, EMI/EMC, computational Electromagnetics, RF/BIO MEMS, metamaterials and microwaves in biomedical applications.
His contribution in the present work is to arrange measurement facility and overall guidance required to accomplish the task.

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