| With the development of communication and electronic techniques,Liquid-metal can not only well receive signal,and the repeated bending will not lead to fatigue materials,it also has the ability to repair itself.Liquid-metal antenna combined the liquidity and ductility of the liquid metal with tubular PDMS elastic,make the shape of the antenna easy to adjust,so the antenna has the characteristics of the reconfigurableA reconfigurable Yagi-Uda with the liquid metal is proposed in this article.By a new electrochemical method for reversible,we control the length of liquid eutectic gallium indium(EGaIn)in the capillary.Electrochemical deposition(or explode)of a surface-oxide on the EGaIn significantly lowers(or increases)its tension to induce the liquid metal up(or down)of the capillary.The three-element array consists of the elements whose lengths can be changed with the liquid metal,resulting in the array directors can be transformed into reflectors,and elements can be changed to the different frequencies.Simulation in CST shows that good impedance matching is realized from 0.85 to 0.95 GHz with the gain over 5 dBi and the VSWR lower than 2across the entire band.The utilization coefficient of aperture field reached 70%.This antenna can be widely used in millimeter radar or communication system.The article concentrates on research and design of UHF-band low-profile single-fed omnidirectional circularly polarized(CP)printed antennas. |
