C/X Dual-frequency Co-aperture Microstrip Array Antenna Research

With the development of antenna technology, dual-frequency microstrip antenna has been more and more attractive for not only decreasing the signal interference and congestion, compared with only one band, but also gaining more information in SAR application, which makes to recognize the objects quite easier.The stress in this paper is C/X dual-band co-aperture microstrip antenna array realization, which needs to meet the requirements of volume, weight and other physical performances and have good characteristics as well. The research and design processes are presented.In the first part of the thesis, the aim and meaning of this paper are introduced. Then the current research and tendency in the field of dual-frequency microstrip antenna are indicated, especially the research points and difficulties. After a brief introduction of its fundamental application and development history, the microstrip antenna and its analysis methods have been proposed, including the basic structures, basic types, feed technology and some new technologies about dual frequency and wide band.Besides, the configuration consisting of microstrip patch elements operating at C band and X band respectively is used as the basic structure for the C/X dual-frequency microstrip antenna, after the rigorous analysis of several kinds of design schemes. According to this, the microstrip patch elements for C and X bands are realized separately. In addition, the mutual coupling between the elements in antenna array is lucubrated, and some rules and measurement methods are obtained, based on which some precautions and compensation could be taken to decrease the impact of mutual...