Mobile Terminal Antenna Research And Design Based On Functional Material

With the continuous development of modern wireless communication technology and functional materials.Wifi/Bluetooth/GPS/Nb-lot/4G full Netcom antennas as well as the future 5G antennas are evolving rapidly.The focus of this paper is gradually shifting from the design of PCB on-board antennas to high-performance new antennas based on functional materials under the background of miniaturized multi-band antenna and the technical breakthrough which functional materials has brought.Based on this.this paper has done the following research:First of all,in order to solve the single input single output(SISO)antenna's design difficulties in the miniaturization and multi-band.This article presents two high-performance SISO mobile phone antennas.Among them.the first one is an onboard SISO mobile phone antenna that can be applied to the LTE/WWAN band which based on the defect structure.The other one is a new SISO mobile phone antenna with a ferrite film on the basis of an onboard SISO antenna.The loading of the ferrite film allows the antenna to cover not only the 2G/3G/4G network.but also the complete coverage of the LTE700 under the condition that the antenna occupies less space(11×30mm2).Secondly.In order to solve the problem of multiple input multiple output(MIMO)decoupling.three high performance on-board MIMO antennas are designed.One of them is to layout a highly isolated MIMO antenna based on changes in the floor structure.The other two are based on the high dielectric constant and high magnetic permeability of magnetic materials.showing great potential in the SISO antenna miniaturization design.The good performance of these two magnetic material antennas and the miniaturization of the antenna by relying solely on the high dielectric constant and high magnetic permeability of the magnetic material are completely different from the ones in this paper.Since the electromagnetic wave of a certain frequency in the antenna interacts with the ferrite film.a tensor permeability will be generated.thereby weakening the correlation between the antenna elements.with this the isolation of the antenna is improving.Finally,the paper proposes the pre-research work the designing of a T-shaped ring-shaped air-slot 5G mobile phone antenna working in the millimeter wave band.Since the 5G mobile phone antenna has millimeter wave characteristics,this determines the antenna itself.In addition,after detailed analysis of the structural form,S-parameter,and pattern of the antenna element,it is known that the array antenna composed of the array element has small geometrical size,high transmission rate,high frequency utilization and perfect orientation.