A compactMIMO DRAwith simultaneous frequency and isolation reconfiguration

Abstract

The frequency and an isolation reconfigurable multiple input multiple output (MIMO) dielectric resonator antenna (DRA) is presented in this communication. The design employs a low-profile rectangular DR element with ground plane having cross shape slots. The slots resonance is effectively combined with the DR-resonance for size miniaturization. Moreover, the slot responds as defected ground structure (DGS) for the DR element upon placement of PIN diodes. Switching amalgam of diodes results in frequency, isolation reconfigurability and resonates the structure in three distinct configurations covering PCS 1900 MHz, Wimax 2.3 GHz, and LTE 2500-2700 MHz bands. A thorough parametric study was performed to study the effects of cross shape DGS on the antenna parameters. The prototype of the proposed MIMO antenna is fabricated and results were measured to certify the simulated results. Few parameters of MIMO such like diversity gain (DG), envelope correlation coefficient (ECC), and mean effective gain (MEG) are provided to verify the MIMO performance.

Multiband hybrid MIMO DRA for Sub‐6 GHz 5G and WiFi ‐6 applications

“…Limited research articles are published in the literature on 2-port MIMO DRA for single 19,20 and multiband operations. [21][22][23][24][25][26][27][28] An annular cylindrical dielectric resonatorbased MIMO configuration is presented in Ref.…”

“…Out of the three resonant bands, the antenna has lower efficiency at the band generated due to the addition of L-shaped strips, unlike the other two bands which are generated due to the excitation of DRA modes. In the antennas discussed above, 19,20,22,[24][25][26] uses additional isolation techniques for achieving better inter-element isolation that increases the simulation and fabrication complexities whereas, in Ref. 21,23 the isolation is higher; however, the dimension of the proposed design is larger.…”