Design of Triple-Band Two-Port DR-Based MIMO Antenna with Circularly Polarization for Wireless Application

In this study, a meticulously designed compact Cylindrical Dielectric Resonator Antenna (CDRA) has been comprehensively examined. This CDRA exhibits a versatile range of polarization characteristics across two distinct frequency ranges. This CDRA exhibits two noteworthy features: Firstly, it utilizes a pentagon-shaped aperture for excitation, effectively generating triple radiating modes within it, namely, HEM11δ, HEM12δ, and HEM13δ. Secondly, the proposed CDRA offers support for two distinct polarization features, namely linear and circular polarization. The first band spans from 3.5 to 4.1 GHz, the second band extends from 6.57 to 7.1 GHz, and the third band covers the range of 7.79 to 8.7 GHz. The antenna maintains an axial ratio below 3 dB in the second band (6.9 - 7.1 GHz) and the third band (8.35 - 8.7 GHz). This design ensures stable circular polarization, enhancing its suitability for a variety of communication applications.