Multiband Antenna Design for Smartphone Covering 2G, 3G, 4G and 5G NR frequencies

This paper proposes a novel compact MIMO antenna that can work over frequency ranging from 1.65 GHz to 4.3 GHz. The non-uniform monopole radiating elements have been designed to cover 2G, 3G, LTE and 5G New Radio frequencies. The identical antenna elements are placed over the non-ground area and require no additional decoupling structure for isolation improvement as mutual coupling between the elements is well below the threshold. FR4 substrate with dielectric constant 4.4, thickness 1.6mm and loss tangent 0.02 is used as ground with dimension of 120mm × 65 mm. IE3D simulation software is employed to optimize the designed antenna. Antenna characteristics including return loss, gain and radiation pattern are discussed for bands under consideration. The diversity performance is calculated and found much better than industrial standards.