Design Of Frequency Reconfigurable Antenna Based On Liquid Metal Surface Reaction

The liquid metal has unique plasticity,and the design of the liquid reconfigurable antenna based on it breaks through the limitations of the miniaturization,wideband and multifunctional design of the traditional solid-state antenna,and provides a new technical approach for the development of antenna reconfigurable.Therefore,based on the research and analysis of the physical and chemical properties of liquid metal,this paper focuses on the technical scheme of designing liquid metal reconfigurable antenna by using liquid metal physicochemical properties,and designs a reconfigurable liquid metal antenna.(1)The mechanism of surface chemical reaction of liquid gallium indium alloy in contact with hydrogen-oxygen solution and hydrogen peroxide solution was studied.The evolution law of surface tension of liquid metal under surface chemical reaction was explored.Based on this,a surface chemical reaction solution switch for liquid metal conductor columns was innovatively designed.(2)A frequency reconfigurable half wave oscillator liquid metal antenna is designed by using surface chemical reaction solution switch.The influence of key physical and geometric parameters such as antenna structure and material on the antenna characteristics is analyzed.The simulation results show that the designed antenna has three modes of operation.when the reconfigurable antenna simultaneously takes care of these three modes of operation The antenna will cover a bandwidth of 1.72 GHz to 2.9 GHz,and the antenna has good radiation performance under different operating modes.(3)Based on the electrochemical reaction mechanism of the morphology change of galliumindium alloy,the influence of the diameter of the micro-flow channel,the key geometry of the electrolyte solution and the physical parameters on the morphology of the galliumindium alloy driven by the electric stress was analyzed,and the structure of the antenna vibrator and the concentration of the electrolyte were determined.The initial value provides a theoretical basis for the design of electrochemically reactive liquid metal antennas.(4)A frequency reconfigurable liquid metal angle reflector antenna is designed to realize the reconfigurable antenna by electrochemical reaction.The simulation results show that the length of the electrolyte solution in the microfluidic channel,the distance between the reflector and the radiation conductor,and the dielectric constant of the glass tube are the main factors affecting the performance of the antenna.The designed antenna operating frequency can cover 0.74GHz-1.7GHz,in which the antenna is At each working frequency,the antenna structure can be adjusted to meet the good impedance matching and radiation performance of the antenna.