A Wideband Eight-Element Antenna with High Isolation for 5G New-Radio Applications

Abstract

A wideband multiple-input multiple-output (MIMO) antenna with high isolation for fifth-generation (5G) new-radio (NR) smartphone employment operating at a range from 3.3–5 GHz is presented in the paper. The wideband antenna is comprised of eight identical radiation units and applies defected ground structure (DGS) to offer higher isolation between antenna units. Each of the antenna elements is formed of a C-shaped microstrip line, two triangle-shaped strips and a rectangular strip. The measurement results present that the transmission coefficients of the presented antenna are smaller than −18 dB in the required wideband, and the envelope correlation coefficient (ECC) values are better than 0.005. The realized gain and efficiency of the designed antenna are about 3.5 dBi and higher than 75%, respectively. The volume of this total antenna is 150 × 75 × 7 mm3, and the measurement of each antenna unit is merely 6.8 mm × 7 mm × 0.8 mm (0.077 λ×0.08 λ×0.009 λ, λ is the wavelength of 3.4 GHz). The presented MIMO antenna is suitable for 5G new-radio (NR) smartphone applications.

Design of a Circular Patch Antenna with Parasitic Elements for 5G Applications

“…The antenna dimensions reported in literature [7,[12][13]25] had a larger size, more complexity, provided unidirectional pattern covering narrower bandwidth. Ta et al [7] and Saleh et al [13] offered a higher gain, while Cai et al [12] offered a lower gain compared to this work. The antenna offered by Koma'rudin et al [25] fainty higher gain.…”

“…As the performance of the antenna results considerable influence on the accomplishment of the plenary communication systems. Lately, research on 5G antenna is very attractive and has been a continuing process [11][12][13]. For literal applications, the extensively utilized compact size and broadband antennas are more delightful [14][15][16][17][18][19][20].…”

A Metasurface Based High Gain Patch Antenna for Future Multiband Wireless Communication

“…At the beginning of the design process, various factors that affect the antenna characteristics were carefully considered [20]. These factors included substrate thickness, electrical dielectric constant, and permittivity losses.…”

Designing Eight-port Antenna Array for Multi-Band MIMO Applications in 5G Smartphones

“…The other four MIMO elements (ant. [5][6][7][8] are placed in the middle of the PCB and support wide bands of 1.684-2.300 GHz for n2, n3, n39, n65, n66 4.432-5.638 GHz for n79, and 5.15-5.63 GHz WLAN. All eight antenna elements are located on the top layer made of a 0.8 mm thick double-sided FR4 substrate with a relative permittivity of 4.3 and a loss tangent of 0.02, as shown in Fig.…”

“…The MIMO antenna technology is utilized for 5G mobile terminals to enhance spectrum efficiency and channel capacity [4], [5]. However, an increase in the number of antennas creates integration issues due to the constrained space available in mobile devices [6], [7]. Many techniques have been used to deal with this problem, including the multimode decoupling method [8] and the hybrid decoupling method (neutralization line and ground slot) [9].…”