Dual port aperture coupled MIMO cylindrical dielectric resonator antenna with high isolation for WiMAX application

Abstract

In this article, a dual port aperture coupled MIMO cylindrical dielectric resonator antenna with enhanced isolation is proposed. Dual feeding techniques are used to excite dielectric resonator. These feeding structures are oriented in such a way so that they can produce orthogonal mode in the dielectric resonator. High isolation is observed by generating two orthogonal modes, that is, and in the dielectric resonator. The fractional bandwidth for port 1 and port 2 is 17.8% (3.1-3.68 GHz) and 18.4% (3.1-3.7 GHz), respectively, and isolation between the two ports exceeds −25 dB within the required band. The proposed antenna is simulated, fabricated, and experimentally tested. Good agreements between measured and simulated results are observed. The various diversity performance parameters are also lie within their acceptable limits. Based on presented results, it can be concluded that the presented MIMO antenna is suitable for WiMAX (3.3-3.6 GHz) applications.