Design of MIMO antenna to interference inherent for ultra wide band systems using defected ground structure

Abstract

A compact monopole ultra wide band (UWB) antenna is analyzed and described with defect in ground plane.

Computational analysis of a dual‐port semi‐circular patch antenna combined with Koch curve fractals for ultra‐wideband systems

“…With the goal of solving the trade-off among the high operational bandwidth, antenna compactness and good inter-port isolation characteristics, [12][13][14][15][16][17][18][19][20][21][22] a 2 × 2 miniaturized Koch curve fractal MPA array with a higher operational range and significant diversity performance is presented in this research. The proposed fractal array is modeled on a 1.57 mm thick FR-4 lossy substrate with relative permittivity ( r ) and loss tangent (tan ) of 4.4 and 0.024 respectively.…”

Opportunistic control of fractal‐based MIMO antenna for sub‐6‐GHz 5G applications

“…A fractal compactness octagonal structure with frequency 3.1–10.6 GHz with band rejection for wireless LAN systems, 7 two closely spaced dual‐band MIMO design using decoupling structure, 8 using the superstrate of EMNZ patch‐type antenna for gain as well as isolation enhancement, 9 a novel technique of Sierpinski Knopp structure using four elements with notch band characteristics 10 designed for dual‐band MIMO systems. The technique of defect in ground structure (DGS) used for interference inherent MIMO has been designed 11 for UWB systems, MIMO antenna was designed for portable devices and wireless LAN rejection, 12,13 using the structure of ohm‐type symbol and structure of L‐shape designed for reduction of mutual coupling, 14 a mushroom structure using metamaterial designed four elements for isolation enhancement MIMO system, 15 a compact novel structure of kotch fractal radiator for band rejection of wireless LAN systems, 16 using the structure of F‐shaped stubs involved, 17 for WLAN rejection characteristics of 4 × 4 MIMO radiator was designed, 18 the technique of neutralization line method for mutual coupling reduction of Wang‐shaped structure, 19 for improvement of the parameter isolation using the technique of molecule fractal structure utilization is designed in 20 . To obtain the low mutual coupling, the technique used periodic‐type multilayered EBG structure, 21 for the applications of wireless services designed UWB MIMO packaging system, 22 and finally, a tree‐like structure of diversity/MIMO radiator for wideband isolation improvement 23 was designed.…”

On the Design and Analysis of Compact Super-Wideband Quad Element Chiral MIMO Array for High Data Rate Applications

“…The lower mutual coupling between the elements ensures high radiation efficiency and, therefore, the diversity performance of the antenna is improved [20]. There are various techniques implemented to improve the high level of isolation between the antennas, such as a slit in the ground plane [21,22], adjusting the spacing between the antenna elements [23], a stub in the ground plane [24,25], using a decoupling structure in the ground plane [26], inserting a stub between the radiators [27], the orthogonal placement of radiators [28][29][30][31][32][33] and the neutralization line technique [34,35]. Most of the existing wideband antennas are not suitable for compact diversity systems due their large sizes [36,37] and improper mutual coupling characteristics over the entire operational validated frequencies.…”

“…(1) The designed MIMO antenna operates from 2.9 to more than 30 GHz, which corresponds to a bandwidth greater than 27 GHz; (2) The bandwidth (GHz and %) of this proposed antenna is greater than all the other antennas referenced in Table 1; (3) From the standpoint of dimensions, the proposed antenna has compact geometry when compared with [20,23,27,28,30,32]; (4) Without any decoupling structure, the isolation characteristics of the proposed MIMO antenna are better than those in [17][18][19][20][21][22]25,27,32,33]; (5) This work also focused on the DG and ECC of the MIMO configuration. DG was not reported in [17,[20][21][22][23][27][28][29][30][31], and a higher DG value is shown when compared with [24,34]. The ECC values were not reported in [21,23,27,28,30,31].…”

“…The ECC values were not reported in [21,23,27,28,30,31]. Due to the better isolation characteristics, the proposed antenna provides lower ECC compared with [17][18][19][20]22,24,25,29,[32][33][34]; (6) Due to the compact geometry and wider bandwidth, the proposed antenna offers higher a BDR value, compared with the other work referred to in the table.…”