Slotted Antenna Array with Enhanced Radiation Characteristics for 5G 28 GHz Communications

Abstract

This paper presents a 1 × 4 linear antenna array working at 28 GHz for 5G communication systems. The proposed array employs four rectangular slotted antenna elements fed by a 1 × 4 T-power divider. An artificial magnetic conductor (AMC) layer is placed below the array for increasing the radiation intensity and improving overall array gain. The measured impedance bandwidth of the proposed array with (|S11| < −10 dB) is extended from 25.36 to 26.03 GHz (with a bandwidth of 0.67 GHz) and from 26.75 to 28.81 GHz (with a bandwidth of 2.06 GHz). The proposed array design exhibits a measured gain value that varies between 11.8 dBi and 13.1 dBi within the operating bands and reaches 13.1 dBi at 28 GHz. The proposed array achieves a radiation efficiency of 83.05%, and a front-to-back ratio ranging between 15 and 20 dB across the operating frequency band. The array is fabricated and tested with good matching between the simulated and tested outcomes. The improved performance of the array makes it a suitable candidate for 5G new radio (NR) communications.

Quad port P-shaped MIMO antenna array for 60 GHz applications

“…Traditional patch antennas have several restrictions, such as low gain, limited bandwidth, and insignificant radiation efficiency. Several techniques are employed to improve antenna radiation characteristics, such as using a metamaterial as a super lens [ 9 ], using the DGS-Loaded Magnetic Material [ 10 ], adding an artificial magnetic conductor (AMC) layer under microstrip antenna [ 6 , 11 ] utilizing the frequency selective surfaces (FSS) [ 12 ], using Double-Side EBG Structure [ 13 , 14 ]. Furthermore, antenna arrays are introduced by the authors to improve the antenna gain by increasing its directivity while maintaining its radiation efficiencies from any degradation [ [15] , [16] , [17] , [18] , [19] ].…”

Metamaterial-Based Series-Fed Antenna with a High Gain and Wideband Performance for Millimeter-Wave Spectrum Applications

“…Several MMW frequency bands, such as 28 GHz, 38 GHz, and 60 GHz, are being considered for deployment in 5G wireless communications [4]. The 28 GHz band, which exhibits significant performance enhancement over the 4G low frequencies, is becoming the subject of extensive research on 5G networks [5]. Nevertheless, the MMW band experiences a high path loss and interference when contrasted with sub-6 GHz frequencies [6].…”