Evaluation And Application Of Millimeter Millimeter Wave Antenna Based On Planar Near Field Technology

As a key technology in antenna research and development,antenna measurement technology has attracted more and more attention in recent years.Due to the increasing size of the antenna,the antenna is developing towards the form of array,and the requirements of antenna accuracy and performance indicators are becoming higher and higher.The traditional far-field test methods can not meet these requirements.Near field measurement technology is rising gradually.Because of its high measurement accuracy,no environmental impact and low cost,it has become a hot content in the field of antenna measurement.In this paper,plane near-field measurement is taken as the research object.The main research contents are as follows:1)Based on the planar near-field technology,a millimeter wave antenna measurement system combining direct mode and external mixing mode is built.Around the basic theory of plane near-field measurement,the near-field and far-field transformation of millimeter wave horn antenna is simulated by MATLAB and FEKO.The results show the effectiveness of the algorithm.Based on the planar near-field measurement theory,a millimeter wave antenna measurement system combining direct mode and external mixing mode is built.The problems existing in the construction process,the system error,the accuracy and repeatability of the system are analyzed and verified.2)The accuracy of planar near-field technology applied to array antenna test is verified.According to the characteristics that the planar near-field antenna suitable for testing is highly consistent with the beamforming height of the array antenna,from the perspective of measurement,the accuracy of the planar near-field to far-field conversion algorithm applied to the array antenna is verified by simulation.