Application Of Probe Compensation And Mode Filtering In Antenna Plane Near-field Measurement

With the development of modern communication technology,it has become an important issue to meet various communication needs in real life.As a key component of communication equipment,the performance of antenna will directly affect the communication quality.It is an urgent requirement to design high-performance antenna.Advanced test methods are indispensable to develop a good antenna.Therefore,the development and improvement of antenna measurement technology is an important part in the communication field.The existing measurement methods can be divided into far-field measurement,near-field measurement and compact field measurement.The near-field measurement is carried out in a microwave anechoic chamber,which is less affected by external conditions and has high security and confidentiality.In this paper,the near-field and far-field transformation method in near-field measurement is studied.The main work is as follows:1.The research background and main development process of antenna near-field measurement technology are introduced.The near-field,far-field and compact field measurement technologies applied in practice are described in detail,and the main development process,advantages and disadvantages of these three measurement technologies are compared.2.The near-field and far-field transformation theory of planar antenna without probe compensation is introduced,and the theoretical derivation and Realization of near-field and far-field transformation without probe compensation are completed.Combined with the specific experimental results,the far-field pattern of horn antenna without probe compensation is given,and compared with the theoretical value.3.The influence of the probe on the antenna far-field pattern is studied,the planar near-field and far-field transformation process with probe compensation is discussed,and the realization of the near-field and far-field transformation algorithm with probe compensation is completed.Combined with the specific experimental results,the difference between the antenna far-field pattern with and without probe compensation and the effect after considering probe compensation are discussed and analyzed.4.The specific application of mode filtering method in antenna near-field measurement is discussed,the theory of mode filtering is introduced in detail,and the algorithm of mode filtering part is completed on the basis of probe compensation.Finally,combined with specific experiments,the improvement of mode filtering on antenna far-field pattern is discussed.