A Dual-Band Multiple Input Multiple Output Frequency Agile Antenna for GPSL1/Wi-Fi/WLAN2400/LTE Applications

Sajid Aqeel,M H Jamaluddin,Owais Owais,Rizwan Khan,M R Kamarudin,Aftab Ahmad Khan,Jalil-Ur-Rehman Kazim

doi:10.1155/2016/9419183

Abstract

A novel dual-band, single element multiple input multiple output (MIMO) dielectric resonator antenna (DRA) with a modest frequency tuning ability is presented in this communication. The proposed antenna operates at GPS L1/Bluetooth/Wi-Fi/LTE2500/WLAN2400 frequency bands. A single dielectric resonator element is fed by two coaxial probes to excite the orthogonal modes. A couple of slots are introduced on the ground plane to improve the isolation between antenna ports. The slots also serve the purpose of reconfiguration in the lower band on placement of switches at optimized locations. The measured impedance bandwidth is 5.16% (1.41–1.49 GHz) in the lower band and 26% (2.2–2.85 GHz) in the higher band. The lower band reconfigures with an impedance bandwidth of 6.5% (1.55–1.65 GHz) when PIN diodes are switched ON. The gain, efficiency, correlation coefficient, and diversity gain of the MIMO DRA are presented with a close agreement between simulated and measured results.

Highlights

Wireless communications advancement has necessitated the advent of new standards in order to satisfy the market demands
The Long-Term Evolution (LTE) promises high data rates to cater for ever increasing application demands
A number of multiple input multiple output (MIMO) antennas for LTE and wireless fidelity (Wi-Fi) applications have been reported in recent literature [3,4,5]

Summary

Introduction

Wireless communications advancement has necessitated the advent of new standards in order to satisfy the market demands. The work in [9] presents a dual polarized cylindrical DRA with good isolation but a relatively large size. A few multiband MIMO antennas that provide the GPS band coverage along with the other wireless communication bands [4, 12,13,14,15] are reported in recent literature. The main contribution of this work is the design of a single element, dual-band MIMO DRA having a modest frequency agility capability that covers the GPS L1 band along with a number of LTE bands. To the best of our knowledge, this is the first single element, dual-band MIMO frequency agile DRA which integrates the GPS and LTE bands.

Antenna Design and Geometry

Parametric Study

Isolation Enhancement and Frequency Agility

Simulation and Experimental Results

MIMO Performance Evaluation

Conclusion