Multifrequency Hybrid Antenna Based On Metamaterial And Its Application

Nowadays,communication technology is developing rapidly,various intelligent terminals support the modern information society,in order to meet the needs of a variety of different communication protocols,antenna design multi-frequency will be an important research topic.Traditional microstrip antenna design technology has been relatively mature,but it is still insufficient in solving complex multi-band and more stringent miniaturization needs.The antenna design without size limitation is realized by using the left-handed material which has special physical properties.This method overcomes the contradiction between antenna miniaturization and multi-frequency.This paper mainly discusses the theoretical basis of metamaterials and left-handed materials and their application in antenna design.In addition,the expanded application design of MIMO antenna in 5G communication and rectifying antenna system in microwave energy transmission system is carried out.A new asymmetric coplanar waveguide-fed(ACPW)four-band hybrid antenna is proposed.The hybrid antenna proposed in this paper combines the traditional monopole antenna,slot antenna and zero-order resonator(ZOR),and realizes the miniaturization design of the low-frequency part by taking advantage of the characteristics of ZOR antenna.Meanwhile,the monopole antenna and slot antenna make up for the deficiency of narrow bandwidth of ZOR antenna.From the simulation results,we can see that it can cover global positioning system(GPS,1.57-1.59 GHz),wireless local area network(WLAN,2.4-2.485,2.69,and 5.725-5.825 GHz),and global microwave access interoperability(WiMAX,2.5-2.69,3.3-3.7,and 5.25-5.85 GHz)applications in three radiation modes with acceptable benefits.Based on the microstrip antenna,a MIMO antenna design with 4×4 structure is proposed.Through the modification and expansion design of the original antenna,the operating frequency distribution of 1.57GHz(1.53-1.6GHz),2.4GHz(2.39-2.51GHz),3.5GHz(3.40-3.75GHz)and 5.5GHz(5.12-6.10GHz)is realized.The MIMO antenna well meets the working requirements of 5G applications in the main band of 3.5ghz,and meets the working requirements of the reserved band of 5-6ghz future WIFI applications.In this paper,an active monopole antenna with coplanar waveguide feeding and independent frequency control for global positioning system(GPS),wireless local area network(WLAN)and global microwave access interoperability(WiMAX)applications is proposed.The antenna is a single surface printed FR4 substrate with an overall size of 45×25×1.6mm3.The antenna is divided into three modules: a monopole antenna,a pair of open ring resonators and a ground plane.Each working frequency band of the antenna is generated by an independent radiation unit,which can realize independent frequency control,making the design,optimization and debugging of the antenna more convenient.Simulation and test have verified that the antenna's working band covers 1.575ghz(1.57-1.59ghz).2.4/5.2/5.8ghz WLAN(2.4-2.485,5.15-5.35,5.725-5.825GHz)and WiMAX(2.40-3.60,5.25-5.85GHz)both have good radiation mode and receiving gain.On this basis,a rectifying antenna system is proposed,and the rectifying circuit system in the 5.8ghz frequency microwave energy transmission system is realized through ADS simulation design.The rectifying efficiency of ADS simulation results reaches 64.6%,which verifies the feasibility of the proposed system structure.