Research And Design Analysis Of The Characteristics Of Planar OAM Antenna

With the rapid development of the "Internet of things" and "Internet plus" in recent years,forcing the number of mobile terminals and the penetration rate rose sharply,so that the mobile Internet show explosive growth trend.However,the number of intelligent terminals continues to grow rapidly,It will make the spectrum resources allocated by the wireless communication system become more and more crowded,and the capacity of the system will become increasingly scarce.In order to solve the increasingly prominent shortage of system capacity and the shortage of spectrum resources and meet the fast growth of upcoming mobile data services,orbital angular momentum technology is being widely concerned by researchers at home and abroadBecause the electromagnetic wave carrying orbital angular momentum with spiral phase factor of exp(il?)(l is the number of modes of orbital angular momentum);in theory,the number of model of orbital angular momentum is the infinite,and the orbital angular momentum beams of different mode numbers are orthogonal to each other;Therefore,when the signal is transmitted on different mode numbers at the same frequency,the signal will not interfere with each other,so the technology has the ability to broaden the channel capacity and spectrum resources.In this paper,the generation method of orbital angular momentum is analyzed and discussed in detail,And the advantages and disadvantages of various methods are analyzed.In view of the problem of the existing about orbital angular momentum generation method and the development trend of the mobile antenna in the future,a design scheme of the single feed plane OAM antenna is proposed.Then,for the proposed single feed plane OAM antenna,There are two schemes designed.One is a single fed elliptical resonator OAM antenna,and another is a HM-SIW.OAM antenna with a single feed.First,a rigorous theoretical analysis of the two schemes is made,which proves the feasibility of the two kinds of antenna design schemes in theory.Then,the two schemes are designed and simulated.For the single fed elliptic cavity OAM antenna,the antenna elements with l =-1 and l = +3 modes are simulated respectively.For the single fed planar HM-SIW OAM antenna,the antenna units with l = +1 and l =-5 modes are simulated respectively.Finally,a dual mode multiplexer with 5.8GHz working frequency is designed based on the simulation of the above mentioned programs.The processing and testing verify that the single fed planar OAM antenna is feasible and reliable.Facing the coming of the era of 5G communication,the array antenna will be widely and widely applied.Therefore,the planar OAM array antenna is studied and analyzed in this paper.First of all,this paper analyzes the design of the existing OAM array antenna:Circular OAM array antenna and reflective array OAM array antenna,and expounds their advantages and disadvantages.A design scheme of array antenna based on planar OAM antenna element is proposed.The OAM antenna element with single feed plane HM-SIW antenna is proposed.The HM-SIW OAM antenna element with single feed is applied in this paper,and a two array antenna is designed.and then processed and tested.It is proved that the scheme is effective and feasible.