Design Of The Millimeter Wave Array Antenna For 5G

With the fifth generation mobile communication systems being soon implemented in commercial product,Massive MIMO antenna system for 5G is playing an important role in it.Due to the inherent characteristics of millimeter wave like short wavelength,wide band and strong penetrability in fog,snow and rain etc.It make device in millimeter wave has many advantages,including compact size,narrow beamwidth,higher resolution and accuracy,reducing ground multipath effects and The clutter echo level,improving the ability to track low elevation angle targets,eliminating interference from outside the beam direction,increasing antenna gain,and reducing peak and average power requirements for the transmitter.Because of the considerable development in millimeter-wave sources,waveguides,components,and antennas,the study of millimeter-waves has great significance in 5G communications,radar,guidance,remote sensing,and radio astronomy.In the field of future communications where spectrum resources are very tight,dual-polarized antennas,or antenna arrays that eventually have dual-polarization effects,have very broad application prospects.It can achieve frequency reuse and double the communication capacity.Dual-polarized antennas are also often applied in radar systems and other areas of communications.A millimeter wave microstrip array antenna for 5G is desiged in this paper.By designing two antenna arrays with vertical polarization directions,the performance of the dual-polarized antenna is comprehensively realized,and the advantages of the millimeter waveband and dual-polarized antenna are achieved.The 5G will soon be implemented.Communication systems will have good research prospects and application value.Thesis work mainly includes several aspects:(1)A horizontally polarized millimeter-wave microstrip array antenna for 5G communication system was designed,using offset feeding,a multilayer PCB board structure,and distributing the radiation patch and grounded coplanar waveguide on both sides,which is connected through the metal via.And a 8×16 microstrip antenna array is desiged.The array antenna was simulated and optimized using high-frequency electromagnetic simulation software Ansoft HFSS.The results showed that the antenna achieved a working bandwidth greater than 2GHz(S11<-10dB)in the Ka-band,with gain of 26dB,the antenna was able to scan within a range of ± 60 degrees in the horizontal direction,main beam gain and sidelobe meet the requirements.And processing and testing units and the sub-array,the test results basically reached expectations.(2)A vertically-polarized millimeter-wave microstrip array antenna is designed,using a slot-microstrip coupling structure,and a multi-layer PCB structure.The RF port is connected to the stripline through the grounded coplanar waveguide on the bottom,and A 32-element microstrip array antenna was constructed,which is optimized using HFSS.The results show that the antenna achieves a working bandwidth greater than 2GHz.(3)A millimeter-band parallel feed antenna array was designed.A six-stage cascaded feed network was formed using a T-type two-channel microstrip power splitter.The 64 radiating elements were fed in equal phase and fed through non-radiated edges.A linearly polarized radiation pattern in the vertical direction was formed.The final 8×8 array achieves S11<-10dB between 33.8GHz-36.2GHz and gain of 24.4dBi at the center frequency of 35 GHz,which is in line with expectations.