Dual-Circularly Polarized Topological Patch Antenna With Pattern Diversity

Mirko Barbuto,Filiberto Bilotti,Andrea Alu,Alessandro Toscano

doi:10.1109/access.2021.3068792

Abstract

Recently, the topological properties of composite vortices, i.e., the superposition between vortex modes of a different order, have proven effective in manipulating the radiation properties of patch antennas and making them suitable for new operative scenarios. In this paper, we exploit these properties to design a multi-antenna system exhibiting both pattern- and polarization-diversity. The low mutual coupling and the possibility to steer two orthogonal polarized fields in different directions, make this radiating element an optimal candidate for antenna diversity or MIMO systems and, thus, for increasing signal quality or channel capacity of a communication system.

Highlights

Wireless systems are rapidly evolving for satisfying the ever-challenging requests of their new application fields, such as Internet of Things, autonomous vehicles, or smart cities
As a possible solution for this challenging task, we propose here to exploit the topological properties of vortex modes generated by standard patch antennas [15]
By properly engineering the excitation of vortex modes, we further extend their applicative scenarios by designing a reconfigurable two-element antenna system able to radiate orthogonal field components in different directions and with reduced mutual coupling between them

Summary

INTRODUCTION

Wireless systems are rapidly evolving for satisfying the ever-challenging requests of their new application fields, such as Internet of Things, autonomous vehicles, or smart cities In these complex scenarios, new technological solutions are required to achieve ultra-high channel capacity, ever lower latency and strongest resilience of the system to changing operative conditions. In both cases, the signals received by the single radiating elements should be independently manipulated for improving the overall system performance For this purpose, multi-antenna techniques require a strong orthogonality between the different propagating channels and low mutual coupling between the radiating elements. By properly engineering the excitation of vortex modes, we further extend their applicative scenarios by designing a reconfigurable two-element antenna system able to radiate orthogonal field components in different directions and with reduced mutual coupling between them This new antenna system can be used, for pattern diversity and MIMO-systems requiring strong orthogonality between multiple channels

THEORETICAL ANALYSIS BASED ON VORTEX MODES PROPERTIES

CONCLUSION