Triple-band operation achievement via multi-input multi-output antenna for wireless communication system applications

Abstract

A multi-input multi-output (MIMO) antenna is designed and discussed for multi-band applications. The constituent antennas are composed of four L-shaped elements and a ground plane. When placed beside each other to form a MIMO antenna, a T-bar shaped parasitic structure is also embedded between the antennas on the backside of the substrate to increase the inter-element isolation. The triple-band performance of the antenna is observed at 2.15–2.73 GHz, 3.1–3.9 GHz, and 5.04–6 GHz. The isolation level of more than 20 is seen over the operating frequency range. The fabricated prototype of the MIMO antenna size is very compact (20 × 40 mm), printed on the FR4 substrate. Based on simulation and experimental results, the proposed design is useful for WiMAX and WLAN applications.

Design and implementation of a compact tri‐band four‐port multiple‐input‐multiple‐output antenna

“…The ground planes of the antenna elements were unconnected in References 23,24. In comparison to previously reported MIMO antennas, 7–25 the prospective MIMO antenna has the following advantages: The four‐port MIMO antennas investigated in the literature have single or dual‐band operation, whereas the prospective antenna has triple‐band operation. The triple‐band operation is achieved without the use of a parasitic radiator/element or multi‐layering. In comparison to previously antenna designs, the developed MIMO antenna exhibits a higher level of inter‐element isolation. The proposed MIMO antenna is easy to manufacture as it is a unilayer module. The antenna has a very small overall footprint when compared to other reported designs, making it suitable for modern communication devices. …”

“…The MIMO antennas presented in References 11,13 were two-port designs with single and dual-band operation. The ground planes of the antenna elements were unconnected in References 23,24. In comparison to previously reported MIMO antennas, [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] the prospective MIMO antenna has the following advantages:…”

“…Numerous two‐port MIMO antenna designs with meta‐structures for isolation were proposed in 16–21 . A two‐element MIMO antenna with the triple‐band operation was investigated in Reference 22 In References 23,24, four‐port MIMO antennas comprised of parasitic elements were developed, but they were relatively bigger in size and only operated in one band. In Reference 25, a four‐port MIMO antenna with dual‐band operation was presented.…”

Broadband sub‐6 GHz flower‐shaped MIMO antenna with high isolation using theory of characteristic mode analysis (TCMA) for 5G NR bands and WLAN applications

“…The performance of current MIMO antenna is compared with 20 other reported works [1][2][3]5,6,[8][9][10][11][12][13][14][15][16][17][18]22,[28][29][30] as discussed in literature. The summary of the performance analysis results is shown in Table 3.…”

“…In recent years, a significant process has been noticed in the design aspects of planar MIMO antennas due to the endless efforts of the antenna designers. Several antenna structures have been reported by using various design approaches, namely, neutralization line technique and metamaterial loaded low mutual coupling array antenna, 1 defected ground structure based UWB MIMO system, 2 double‐sided MIMO antenna with symmetrical circular type elements include slotted ground plane, 3 asymmetrical coplanar strip (ACSP) wall loaded low mutual coupling two‐closely spaced microstrip antenna, 4 two elements MIMO antenna with improved isolation, 5 a kotch fractal MIMO antenna with rejection of WLAN band, 6 defected ground structure based edge truncated square patch MIMO antenna for interference inherent UWB systems, 7 modified circular shape MIMO antenna using diagonal parasitic elements, 8 inverted L‐monopole antenna elements with interconnected ground plane arrangement of four port MIMO antenna, 9 inverted L‐shape as well as ohm symbol shaped slot incorporated MIMO antenna with reduced mutual coupling, 10 simple radiation patch with grounded coplanar waveguide with conductive elements feed line MIMO antenna improved isolation, 11 UWB MIMO antenna with slotted ground plane for enhancement of isolation capability, 12 compact MIMO antenna have reduced ground plane for mutual coupling reduction, 13 parasitic element incorporated dual‐polarized MIMO antenna for LTE and Wi‐Fi systems, 14 F‐shaped type stubs loaded UWB‐MIMO structure, 15 split ring resonator loaded monopole four element MIMO antenna, 16 multiple slots and stepped ground loaded four port MIMO antenna, 17 MIMO antenna with L‐shaped patches embedded with T‐bar shaped parasitic structure, 18 3‐D meta material loaded MIMO system, 19 meander line inserted structure integrated textile MIMO system for 5G, 20 MIMO antenna arrangement with circular, semi‐circular related shaped type slots loaded patches and cross‐shaped type ground plane, 21 multiple square parasitic elements based MIMO antenna for isolation improvement, 22 dual‐band array by employing meta‐surfaces for mutual coupling improvement, 23 multi‐band minkowski fractal MIMO antenna for isolation enhancement, 24 and cavity backed structure annular patch for multi‐polarization systems 25 . Researchers, designers, and engineers are working rigorously to design efficient antennas for providing the best possible smart solutions for modern emerging wireless communication applications by using advanced electromagnetic simulation tools.…”