Research On Optically Transparent Antenna Based On Metal Oxide Film And Metal Grid

In recent years,communication technology has developed rapidly.While communication technology has continued to facilitate people’s lives,people have also put forward more requirements on communication systems.In addition to conventional communication requirements,in some special scenarios,people also hope that communication systems can play a role.For example,when the application scenario is certain transparent scenarios,there are windows,car glass,various smart device display screens,etc.If we continue to use traditional metal opaque antennas to receive or transmit signals,although the gain of such metal antennas is high,But in the transparent scene will affect the light transmission,and it is not beautiful.Therefore,in order to cope with the communication needs in a transparent scene,we hope that an antenna can not only receive and transmit signals normally,but also have the characteristics of optical transparency.We call this type of antenna collectively an optically transparent antenna.The concept of optically transparent antennas was first proposed by the National Aeronautics and Space Administration in 1997,and has now undergone more than two decades of development.During this period,scholars continued to invest in the research of optically transparent antennas,mainly focusing on solving the problems of materials and methods for making optically transparent antennas,feeding methods of optically transparent antennas,and improving the efficiency of optically transparent antennas.In this paper,two optically transparent antennas are mainly designed.The first is an ultra-wideband optically transparent antenna.The main application scenarios are transparent scenes such as window glass.The bandwidth of this antenna is 0.8GHz-6GHz.The material of the radiator is transparent metal oxide-indium tin oxide,referred to as ITO.The dielectric substrate is glass.In order to achieve ultra-wideband characteristics,a bow-tie antenna is used.Form to design.In the subsequent processing of the second batch of antennas,in order to reduce the loss at the feed,a copper sheet was plated at the feed and then soldered to the SMA head.The second is an antenna designed for the 5G millimeter wave band(26.5GHz-29.5GHz),which is intended to be used in the display screen of smart devices.This antenna is in the form of a microstrip antenna as a whole.In order to achieve optical transparency,a diamond-shaped metal grid made of silver alloy is used as the radiation patch of the antenna.The diamond-shaped grid is used instead of the conventional rectangular grid to eliminate the mole.To avoid blurring the screen.The material of this antenna substrate is also glass,and the material for the metal ground on the back of the glass substrate is also silver alloy.Both antennas have good radiation performance in the corresponding bandwidth.