H-shaped slot coupled dual-polarized dielectric resonator antenna for C-band applications

In this paper, a cylindrical dielectric resonator antenna (DRA) excited by two orthogonally placed H-shaped aperture slot is presented with high isolation exceeding 32 dB in C-band. For dual linear polarization, the DRA in its TM₁₁₀ (HEM₁₁) mode is excited to yield broadside radiation pattern. To confine the slots to the central area of cylindrical DR for TM₁₁₀ mode, the rectangular shaped slots are molded to H-shaped slots. The co-polarization level in both planes is found to be nearly 30 dB higher than the cross-polarization in broad-side direction. The proposed feed for cylindrical (DRA) has been achieved -10 dB impedance bandwidth of 4.8% for 6.1 to 6.4 GHz. The broadside radiation patterns with nearly same pattern shapes are found to be stable with the gain of 5.2 dB for both ports.