Reduced lateral wave cylindrical dielectric resonator antenna

A reduced-lateral-wave cylindrical dielectric resonator antenna (DRA) is presented, which produces very little lateral radiation at the horizon. The design technique centers on finding an optimal aspect ratio of height to radius for the DRA to minimize the lateral radiation. The lateral radiation of the DRA is reduced by operating in the higher-order TM₁₂₁ mode. The tradeoff is a reduced bandwidth, relative to the usual TM₁₁₀ mode. Numerical results are obtained from both HFSS and CST Microwave Studio simulations.