Design of compact dual-band PIFA Antenna for 5G communication systems
Abstract
This paper proposes a dual-band PIFA antenna operated at 28/38 GHz for 5G communication systems. The PIFA antenna consists of two dielectric layers and an air gap is inserted between these two layers. Both substrates, namely Roger RT dielectric, have a relative dielectric constant of 2.2 and a thickness of 0.127 mm. The radiator of the antenna is a rectangular patch in which a spiral slot is etched on its surface to create dual-band frequencies of 28 GHz and 38 GHz. Firstly, the proposed antenna is designed based on the theoretical calculations and then the numerical simulation using Finite Element Method (FEM) is used to optimize results. The total length of the radiator is approximately 0.25λg at the frequency of 28 GHz. The numerical results indicated the proposed PIFA antenna can be operated in a dual-band frequency with an impedance matching of 5.7 % (27 - 28.6GHz) for |S11| £ –10 dB and a realized gain up to 6.81 dBi for the first resonant frequency at 28 GHz and an impedance matching of 14.5% (35.7 - 41.2 GHz) for |S11|<–10 dB and a realized gain up to 7.92 dBi for the second resonant one.