Study On Ku/Ka Shared-aperture Array Antennas With Dual-polarization And High-isolation

With the development of electronic technology,electronic devices of various functions continue to emerge,and at the same time,multiple functional electronic systems will be integrated on a single carrier,so shared-aperture antenna design technology has received more and more attention,which has led to greater research enthusiasm for antenna workers.Starting from the design of the antenna unit,a Ku/Ka dual-polarization shared-aperture array antenna is studied through the selection and analysis of different antenna elements and their combination forms.The main works of this thesis are summarized as follows:1.Based on the theory of antenna,the working principle and analysis method of microstrip antenna,printed dipole antenna and Vivaldi antenna are studied.2.According to the requirements of scientific research projects,broadband printed dipole antenna and Vivaldi antenna were designed.The broadband feeding technology of Vivaldi antenna is studied,the radiation charecteristics of the antenna are improved by current controled sleeve and open slot structure.The effect is to increase the antenna gain by 3d B and reduce the side lobe.3.Two dual-polarized array antennas were designed using a printed dipole antenna and a Vivaldi antenna respectively.Combining two types of dual-polarization arrays with microstrip antennas,two Ku/Ka common-aperture arrays were designed.The results of the research show that the Ku/Ka shared-aperture array antenna with a combination of the Vivaldi antenna and the microstrip antenna has higher isolation.