Millimetre‐wave T‐shaped MIMO antenna with defected ground structures for 5G cellular networks

Abstract

In this study, a millimetre‐wave (MMW) antenna is presented for the fifth‐generation (5G) wireless multiple‐input multiple‐output (MIMO) applications, in order to offer numerous advantages including compactness, planar geometry, high bandwidth, and high gain performance. The concept of defected ground structures has been deployed for the first time in MIMO antenna design at MMW spectrum to fulfil 5G requirements of high bandwidth with compactness and low design complexity. The top surface of antenna comprises of a coplanar waveguide‐fed T‐shaped radiating patch element, while the bottom part is designed to constitute a partial ground loaded with two iterations of symmetrical split‐ring slots at an optimised distance. Experimental results depict a wide bandwidth of 25.1–37.5 GHz, as well as a peak gain of 10.6 dBi at 36 GHz. Moreover, numerically evaluated efficiency of >80% is observed over the entire intended bandwidth of operation. For the demonstration, four‐element MIMO antenna array of the proposed antenna element is also fabricated and tested, in order to validate high isolation between the adjacent elements, which makes the proposed antenna a potential candidate to be integrated in cellular phones and base stations for 5G MIMO systems and services.

Metamaterial superstrate microstrip patch antenna for 5G wireless communication based on the theory of characteristic modes

“…To address these shortcomings, the world has set its sights on the 5G wireless system, expected to be deployed by 2020 [2]. Wireless system designers need to adopt a new approach to concept and design to fulfil the needs of this fifth-generation wireless system that promises higher data rate, better reliability, more connectivity, lower latency, and improved security features [3,4].…”

Bandwidth Enhancement and Mutual Coupling Reduction Using a Notch and a Parasitic Structure in a UWB-MIMO Antenna

“…Similarly, a passive microstrip-based feed network was introduced in [5] and a cylindrical dielectric resonator antenna (CDRA) in [6] for good MIMO operations at higher frequencies. A number of radiating elements in MIMO antenna systems were designed to improve isolation with DGS using different shapes (T, F, 4, arch) and slot lines, rectangular rings, and ground slits were also employed [7][8][9][10][11][12][13][14]. In [15], the electromagnetic bandgap structure was applied to closely placed arrays in the ground plane, resulting in a significant reduction of mutual coupling across a wide operating band.…”

A Dual-Band Dual-Antenna System with Common-Metal Rim for Smartphone Applications

“…Compared to mobile data traffic, WIFI has a faster transfer speed at a lower price, so it becomes top priority while transmitting massive data for terminal devices [6,7]. To further realize a higher data rate without additional power, multiple-input multiple-output (MIMO) antennas with proper isolation are being widely applied in mobile terminals as well [8][9][10][11][12][13][14]. However, for the metal-rimmed smartphone utilizing multiple antennas, the high mutual coupling in smartphones will occur inevitably when the MIMO antennas share the common part of metal rim and work in the same frequency band.…”