Low-profile miniaturized dual-band dielectric resonator antenna with a mountain-shaped ground

A novel method is proposed to achieve a low-profile miniaturized dual-band dielectric resonator antenna (DRA) for wireless communication applications. The cylindrical dielectric resonator (DR) is fed by a microstrip loop on the top surface of the substrate and a mountain shaped ground on the bottom surface of the substrate. This structure not only effectively transfers energy to the DR but also plays a pivotal role in establishing a lower resonance frequency of 1.73 GHz, achieving this with a compact structure (0.21 lambda 0 x 0.18 lambda 0 x 0.02 lambda 0, and lambda 0 is the free-space wavelength at 1.73 GHz). HEM11 delta mode of the cylindrical DR is employed to cover the upper frequency band of 2.8 GHz. Ultimately, the effectiveness of our suggested approach and the antenna's performance are confirmed through the measurement.