Multi-system Antenna Array Design And Research On Fusion Technology

With the popularization of 5G communication technology,antennas are an important part of radio frequency components,and society will have higher and higher requirements for their functions and applicability.With the development of new frequency bands,the number of antennas in antenna base stations and the complexity of their combinations are rapidly increasing.Therefore,modern base station antennas need to develop in the direction of easy processing,miniaturization,and wider bandwidth.At the same time,the problem of radiation interference between antennas of different frequency bands in the base station urgently needs to be solved.This problem will cause the corresponding antenna radiation characteristics and gain to be severely affected,thereby causing the antenna to fail to work normally.In addition,the research on antenna broadbandization is also a hot direction.At present,scholars have proposed many methods to increase the antenna bandwidth.This article uses the method of adding a ?-type coupling feeder and balun to design a broadband antenna to obtain a broadband antenna used in the complete communication frequency band of 0.69GHz-0.96 GHz.For the multi-system antenna fusion technology,this article uses the addition of open circuit direct Methods to reduce its current radiation interference to other frequency bands.1.First of all,explain that the research background of this paper has been aimed at the essence of contemporary mobile communication systems,and at the same time briefly describe the development of the theoretical merger technology of base station antennas.2.Based on the work of the original project,design two types of antennas suitable for 0.69GHz-0.96 GHz and stepped high-frequency antennas for 1.76 GHz-2.05 GHz.Both antennas adopt±45° dual polarization polarization.In this way,the directivity is symmetrical and the isolation between the two ports is below-30 d B,and the exchange feeder and balun are added to increase the bandwidth of the antenna.And finally the gain obtained can be optimized and higher than 8 d Bi.3.Based on two of the antennas,we conduct research on antenna fusion technology.In the process of multi-system fusion antennas,we can find that the spatial positions of low frequency and high frequency overlap,which leads to distortion of their respective patterns,which affects the working efficiency of the antenna.Based on this phenomenon,we add open stubs to the dipole of the low-frequency antenna to generate smaller induced current radiation in the frequency band where the high-frequency antenna works,thereby restoring the pattern of the high-frequency antenna.And this design does not change the radiation characteristics of the low-frequency antenna.