Research And Design Of High Gain Antenna Based On Ad-Hoc Network Node

With the continuous consolidation and development of Ad-Hoc network technology,it has been widely used in military,disaster relief,personal equipment and other aspects.In ad-hoc network,communication between nodes is affected by distance.Therefore,higher requirements are put forward for the communication between nodes far away from each other in ad-hoc networks.In wireless Ad-Hoc network,high gain antenna can be designed to extend the communication distance of Ad-Hoc network nodes.Therefore,it is of great practical significance to carry out the research and design of high gain antennas related to Ad-Hoc network nodes.According to the actual requirements of the National Natural Science Foundation project "Theory and Key Technology of Amorphous Flat Self-organizing Wireless Network",this paper researches and designs the high-gain antenna.The main research work and innovations are as follows:1.In order to make Ad-Hoc network nodes adapt to the influence caused by the change of communication distance between nodes and better realize long-distance communication,the structure of Ad-Hoc network nodes and the related content of directional antenna are studied in this paper.A new form combining high gain directional antenna with Ad-Hoc network nodes is presented to extend the communication distance of Ad-Hoc network nodes.2.According to the requirements of Ad-Hoc network nodes working in the 2.2-2.7GHz frequency band,a high-gain microstrip array antenna is designed.The antenna gain can reach 11.8dBi,and the measured gain can reach 11.5dBi,with wide operating bandwidth.In addition,this paper innovatively conducts experiments with the designed antenna combined with the ground Ad-Hoc network platform,and carries out comparative experiments with the traditional antenna.The experimental results show that the communication distance of the designed antenna reaches 879 meters,which is about 6-8 times higher than that of the traditional two antennas,which can reach 99 meters and 134 meters.3.According to the requirements of Ad-Hoc network nodes working in the 3.3-3.7GHz frequency band,a high-gain broadband double-sided printed dipole array antenna is designed,and the antenna gain can reach 20.5dBi.The gain at the frequency of 3.3GHz,3.5GHz and 3.69GHz reaches more than 20dBi,which can well meet the design requirements.The main innovations of the antenna are:wide bandwidth,the shape of the printed dipole is exponential gradual change of the sector structure.In addition,adding a metal reflector plate below the antenna can expand the bandwidth to better achieve the role of orientation,so as to further improve the gain.