Abstract
A design of mobile-phone antenna array with diamond-ring slot elements is proposed for fifth generation (5G) massive multiple-input/multiple-output (MIMO) systems. The configuration of the design consists of four double-fed diamond-ring slot antenna elements placed at different corners of the mobile-phone printed circuit board (PCB). A low-cost FR-4 dielectric with an overall dimension of 75 × 150 mm2 is used as the design substrate. The antenna elements are fed by 50-Ohm L-shaped microstrip-lines. Due to the orthogonal placement of microstrip feed lines, the diamond-ring slot elements can exhibit the polarization and radiation pattern diversity characteristic. A good impedance bandwidth (S11 ≤ −10 dB) of 3.2–4 GHz has been achieved for each antenna radiator. However, for S11 ≤ −6 dB, this value is 3–4.2 GHz. The proposed design provides the required radiation coverage of 5G smartphones. The performance of the proposed MIMO antenna design is examined using both simulation and experiment. High isolation, high efficiency and sufficient gain-level characteristics have been obtained for the proposed MIMO smartphone antenna. In addition, the calculated total active reflection coefficient (TARC) and envelope correlation coefficient (ECC) of the antenna elements are very low over the whole band of interest which verify the capability of the proposed multi-antenna systems for massive MIMO and diversity applications. Furthermore, the properties of the design in Data-mode/Talk-mode are investigated and presented.
Highlights
Nowadays, there is an increased interest in research on MIMO systems in wireless communication [1,2]
We propose here a new design of Eight-port mobile-phone antenna with compact dual-polarized radiation elements providing wide impedance bandwidths for 5G applications
It mainly affects the impedance bandwidth of the antenna: when its size changes from 0.5 to 2 mm, the antenna operation bandwidth varies from 0.3 to 1.2 GHz. Another important parameter of the dual-polarized diamond-ring slot antenna design is the length of the feed line arm (L1) which tunes the isolation characteristic
Summary
There is an increased interest in research on MIMO systems in wireless communication [1,2]. We propose here a new design of Eight-port mobile-phone antenna with compact dual-polarized radiation elements providing wide impedance bandwidths for 5G applications. Eight-element MIMO smartphone antenna can achieve the channel capacity of 37 bps/Hz which is close to eight times that of a single antenna for single-input/single-output operation. With such a channel capacity and a wide frequency spectrum (200 MHz, at least), the data rate can be much higher than 1 Gbps. The antenna elements exhibit wide impedance bandwidth with low mutual coupling function providing pattern and polarization diversity characteristics at different sides of the mobile-phone PCB. The performance of the designed mobile-phone antenna in Data-Mode/Talk-Mode are studied
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
