The Research Of Integrated Antenna For 5G Millimeter Wave Mobile Communication

With the advent of the 5G mobile communication era,the application of millimeter waves in communication systems is becoming more and more widespread,and millimeter wave antennas with excellent performance are an indispensable part of millimeter wave communication systems.Millimeter wave has the advantages of wide frequency spectrum and short wavelength,which makes the millimeter wave antenna smaller.Millimeter wave is an ideal frequency band for wireless communication.Millimeter wave mobile communication equipment,including 5G communication systems,is currently moving towards broadband and high integration,which requires millimeter wave antennas to be integrated with other parts of the millimeter wave system such as chips,packages,substrates,and chassis,etc.In response to the needs of 5G mobile communications,this thesis has studied and designed three integrated antennas that work in the 5G millimeter wave frequency band(24.25-29.5 GHz).The main research contents are as follows:1.A new type of millimeter wave frequency band integrated antenna is proposed,that is a packaged substrate distributed antenna.This novel integrated antenna with its structure distributed on both package and substrate.In this way,the low-loss interconnection from the package to the substrate is realized by the antenna's internal coupling instead of the conductor connection.In addition,the same excitation structure on package design can be reused by being integrated with different radiation structures on the substrate to achieve different radiation performances,according to different application requirements which reduces the design cycle and cost of millimeter wave integrated antennas.Two package substrate distributed antenna working at 5G millimeter wave band(24.25-29.5 GHz)are designed,processed and tested,which have end-fire and broadside radiation sharing the same excitation structure on the package.2.Millimeter wave phased array based on serial-fed parasitic patch elements is presented.The series-fed patch elements are fed by SIW(Substrate Integrated Waveguide)from the middle to reduce the feed network loss and ensure that the beam is directed to longitudinal plane.Parasitic patches are added between the series-fed patch elements to reduce the longitudinal plane sidelobes and add resonance points to broaden the impedance bandwidth.Based on this column of units,a one-dimensional scanning phased array of 4 columns of units is formed.This phased array is implemented using a multi-layer PCB substrate integration process and can cover the 5G n257 frequency band(26.5-29.5 GHz).After processing and testing the samples,the results show that it can achieve satisfactory beam scanning in the band.3.Millimeter wave phased array based on series-fed U-shaped quasi-patch elements is designed.The U-shaped quasi-patch elements are designed to reduce the lateral plane aperture to broaden the lateral beam width while ensuring the impedance bandwidth.Adding some shorting points to the U-shaped quasi-patch elements to increase the resonance points and broaden the working bandwidth.The use of center feeding combined with series feeding reduces the feed network loss of the millimeter-wave phased array and ensures that the beam is directed to longitudinal plane.Based on this column of units,a one-dimensional scanning phased array of 4 columns of units is formed.This phased array is implemented using a multilayer PCB substrate integration process,and its working bandwidth can cover the entire5 G millimeter wave frequency band(24.25-29.5 GHz).The results of the simulation show that it can achieve satisfactory beam scanning in the band.