Compact Broadband and Dual-Polarized Cylindrical Dielectric Resonant Antenna

In this work, we propose a compact broadband cylindrical dielectric resonant antenna working from 1.8GHz to 2.2GHz. First, based on two kinds of orthogonal models, we get a dual-polarized broadband antenna with a wide relative bandwidth of 20%. Then, with the proposed antenna structure, the cross polarization highly decreases. Specifically, the cross-polarization discrimination (XPD) can reach 18dB at 2.14GHz and 14dB at 1.84GHz in bore-sight direction. Finally, in such a compact size of 0.2 λ, the isolation between two ports improved by the metal post can reach 15dB on average with its minimum value of -40 dB at 2.05 GHz. The simulation verifies that the maximum radiation direction is perpendicular to substrate with the total gain of 6.4dB at 1.84GHz and 6.9dB at 2.14GHz. Thus, the characteristics of compact aperture and dual-polarization makes that the antenna can be used as miniaturized base station antenna.