Mutual Coupling Reduction using Defected Ground Structure in UWB DRA Array for MIMO Application

A novel approach for low mutual coupling and ultra-compact Two Port MIMO antenna development for UWB wireless application

“…Therefore, regulating the mutual coupling within the current miniaturized printed antennas as well as other antennas is the critical concern in the development of the MIMO antenna [6,7,8]. Different approaches to reduce the mutual coupling among closely space antennas have been reported in the literature such as Defected Ground Structures (DGS) [9], electromagnetic bandgap structures (EBG) [10], slits and slots etching approaches [11], antenna separation, antenna placement and orientation technique such as orthogonal orientation [12,13,14], combined orthogonal orientation and extended ground plane, neutralization line [11], parasitic elements [15,16], and meta-surface (MTS) and metamaterial (MTM) [17]. Although a wealth of information has been given by past studies, most have had some limitations.…”

A MIMO Dielectric Resonator Antenna in single DRA Element with Reduce Mutual Coupling

“…Dielectric resonator antenna has become one of the popular methods owing to its high gain, low loss, large impedance bandwidth [13], easily integrated with printed board [14], and flexibility excitation schemes such as microstrip feed lines, coaxial feed probes, aperture coupling, proximity feed, and co-planar waveguides [1,[15][16][17]. Therefore, extensive research on the dielectric resonator antenna (DRA) MIMO antenna has been published, focusing on mutual coupling reduction [1,13,16,[18][19][20][21][22][23][24]. A few methods adopted from previous studies on the reduction of mutual coupling for DRA MIMO system were metamaterial polarization-rotator wall [18], metasurface shield [22], modified DRA shaped [13,24], metallic vias and strips [16,21], varying the DRA excitation mode [1] and dielectric superstrate [19].…”

“…Therefore, extensive research on the dielectric resonator antenna (DRA) MIMO antenna has been published, focusing on mutual coupling reduction [1,13,16,[18][19][20][21][22][23][24]. A few methods adopted from previous studies on the reduction of mutual coupling for DRA MIMO system were metamaterial polarization-rotator wall [18], metasurface shield [22], modified DRA shaped [13,24], metallic vias and strips [16,21], varying the DRA excitation mode [1] and dielectric superstrate [19].…”

“…However, the additional complexity in the design and decoupling of structures yield hassle and increase the design process. Most of the MIMO DRA needs two (2) or more DRA structures [1,[15][16][17][23][24][25][26], which contribute the extra structure and cost to the antenna.…”