Study On Position Error Analysis And MARS Correction Of Spherical Near-field Measurement

Antenna Measurement is the key technology for antenna performance evaluation.Now with the development of technology,all kinds of communicating equipments update quickly,we have higher expecting for antennas' electrical performance.A viable of antenna measurement solutions and methods should be synchronized with the research and development of new antenna.Antenna measurement results can not only verify the correctness of the theory on designing and analyzing,but also can make unqualified items of antenna performance clearly.It can easy to strengthen the theoretical design or improve the processing technology,is the most important part of antenna designing,production and application.Especially in high-precision,high-performance new antenna development 、 production and using,the measurement of antenna is essential.So,the study on error analysis and correction of antenna measurement has good theoretical and practical significance.This paper mainly analyzes the variation of the measurement results caused by the different antenna mounting positions of spherical near-field measurements,applies MARS technology to analyze and experimentally verify the measurement error caused by the measurement environment.The main study includes: briefly introduced the development status of antenna spherical near-field measurement technology and the principle and composition of spherical near-field measurement system,familiar with the basic principles of near-far field conversion and the main sources of error in spherical near-field measurements,analyzed the influence of the variation of measurement results caused by the different positions of the tested antennas on the measurement accuracy,analyzed the measurement error caused by chamber's environment and applied the MARS correction technique to the detailed experimental study on the correction effect of the measurement error caused by chamber's environment.Based on the research and analysis of the spherical near-field measurement error and correction method,the measurement error caused by the position of antenna mounting is analyzed and compared with experiment,through theoretical research and a large number of experiments,the correction effect of MARS technology on measurement error caused by chamber's environment is verified.Research shows that the MARS correction technique is better for the low frequency than high frequency when applied to different measurement frequencies.And obtained the relationship between MARS correction error level and measurement frequency.Provide an effective means to reduce antenna measurement error.