Comparative Study on Different Feeding Techniques for Dual Polarized Dielectric Resonator Antennas

Here, we design and analyze several dual polarized dielectric resonator antennas (DRA) excitation techniques and compare their advantages and disadvantages. A simple cylindrical disk DRA is used. It is designed to resonate around 10 GHz. The feeding mechanisms include probe excitation, aperture couple excitation and co-planar waveguide (CPW) feed. In addition, we also discuss combinations of different feeding mechanisms, such as probe/aperture or aperture/CPW. The comparisons are based on resonant frequency, common matching bandwidth (S
₁₁
< -10 dB), isolation and radiation pattern symmetry