Millimeter-Wave Quad-Band Dielectric Resonator Antenna for 5G Applications

In this paper, a millimeter-wave quad-band dielectric resonator antenna (QD-DRA) for fifth-generation (5G) applications, is suggested for antenna gain enhancement. The DRA is designed in conjunction with a superstrate, placed over a substrate material of RT/Duroid 5880, which is characterized by a relative permittivity equal to 2.2, a tangent loss of 0.0009, and a compact size with an overall dimension of 12 mm × 11 mm × 0.25 mm. This antenna achieved the quad bands for wireless communication, i.e., it resonates at four different frequencies 28 GHz, 34 GHz, 38 GHz, and 42 GHz with a gain of 6.92 dBi, 7.4 dBi, 8.59 dBi, and 7.57 dBi, respectively. The proposed antenna is designed in Computer Simulation Technology (CST) software. From the simulations and experimental results, it is proved that the proposed structure enables stable radiation characteristics with enhanced gain, wider bandwidth and higher impedance matching, achieved at all the resonant frequencies, compared to the prior antenna designs. The overall efficiency for this proposed DRA is more than 80%. This antenna is miniaturized and can be ideal candidate for 5G applications.