Abstract
This paper introduces a dual-band rectangular dielectric resonator antenna (RDRA) design for beyond-fifth-generation (B5G) applications. The RDRA operates at both sub-6 GHz and millimeter-wave (mm-wave) bands, featuring a high permittivity of 19.8 for miniaturized volume. Additionally, we introduce an innovative dual-band RDRA design, which incorporates a rectangular dielectric resonator (RDR) and a ceramic/polymer structure to enable two distinct operating frequencies , i.e., 3.5 GHz and 28 GHz, respectively. Simulations are performed using ANSYS HFSS software, achieving bandwidth of 7.7% and 17.8% and gain of 4.6 dBi and 7.6 dBi for the sub-6 GHz and mm-wave structures, respectively. The performance of the sub-6 GHz RDRA structure is demonstrated through a combination of simulation and prototype experimental validation. A bandwidth of 9.19% with an impedance match of-43 dB is achieved at the resonant frequency of 3.59 GHz. A peak gain of 4.72 dBi is also demonstrated.