A cross-shaped MIMO reconfigurable dielectric resonator antenna for GSM and LTE/UMTS applications

In this work a MIMO Reconfigurable Dielectric Resonator antenna (DRA) is proposed. The antenna comprises of cross-shaped DR, fed by two orthogonal probes. Adjacent to both probes, two rectangular micro strip patches are... [ view full abstract ]

In this work a MIMO Reconfigurable Dielectric Resonator antenna (DRA) is proposed. The antenna comprises of cross-shaped DR, fed by two orthogonal probes. Adjacent to both probes, two rectangular micro strip patches are stacked to the walls of DRA to enhance the return loss and improve the impedance matching. Two C-shaped deformations are made on the ground plane. Four PIN-Diodes are located on the C-shaped deformations. Re-configurability is achieved when PINdiodes are switched OFF or switched ON. The reconfigurability is attained for two resonance frequencies. For the configuration I, the antenna resonates at 1.84GHz but the overall bandwidth covers GSM 1900MHz whereas for the configuration II, the antenna resonates at 2.08GHz but the total bandwidth includes frequencies, which can be used for LTE/UMTS 2100MHz applications. The antenna performance is analyzed in terms of simulated return loss, radiation pattern, diversity gain and envelope correlation function. The antenna system was designed in CST Microwave studio 2018. Simulated results confirm that this reconfigurable MIMO system has promising values for the mentioned parameters