Research On The Key Technology Of RF Integration Antenna System

The trend of electronic information system is radio frequency integrating,which has become a hotspot of research and application all over the world.The integrated use of radio frequency can significantly reduce the cost of volume,weight,power consumption and failure rate of the radio frequency electronic system,so as to make the hardware and software resources sharing for radio frequency integration come true.Integrated antenna is the key technology of RF system.In this paper,a radio-frequency integrated shared aperture antenna was designed which can work in Bei Dou satellite,GPS positioning and navigation bands.Meanwhile,focusing on the hot issues about the integrated antenna design such as reconfigurability,shared aperture,multiband,miniaturization,multiband stacked microstrip antenna,reconfigurable antenna and ultra-wideband antenna’s mechanism analysis and implementation were researched.Stacked co-aperture microstrip antenna,circular nested reconfigurable antenna,ultra-wideband Vivaldi antenna were designed and fabricated.The results of electromagnetic full-wave simulation and experimental tests were compared and the conclusion of engineering application value were given at the end.The main work of this paper is as follows:1.Summarize key points of the RF integrated system and its integrated aperture antenna system and analyze its advantages comprehensively and systematically,besides,put forward the corresponding solutions and precautions for the design difficulties of synthetic aperture antennas.The common forms of radio frequency integrated aperture antenna ware listed,which has broad application prospects.2.A stacked rectangular microstrip patch antenna in the field of radio frequency integrated antenna was designed,which is representative in the field of radio frequency integrated antenna.The antenna was initially designed with a cavity model for theoretical analysis and design,which can achieve multiband work independently.3.A circular and annular microstrip patch antenna was designed,which can realize frequency and pattern reconfigurable.By using the electromagnetic coupling effect between each unit,the combination of the radiation patch is transformed by MEMS switch,and the corresponding reconfigurable results were realized.At the same time,the antenna overcomes the radiation direction changes caused by frequency switching to some degree.4.Design a ultra-wideband Vivaldi antenna with wide range of applications.Based on traditional Vivaldi antenna,double slot line transmission and "T" shaped power splitter feed structure allow the antenna to effectively work in ultra-wideband range with higher gain and miniaturization compared with the traditional Vivaldi antenna.