In this paper,a wideband dual circularly polarized(CP)antenna array covering K band is designed.The radiating element of the antenna adopts the form of a separator polarizer to achieve bet-ter dual CP performance,wide working bandwidth and simple structure.The feeding part adopts the form of square coaxial line,which makes the structure of the whole feeding network compact,and greatly improves the efficiency and space utilization of the antenna.The simulation results show that in the required 15 GHz-25 GHz frequency band |S11| and |S22| are both less than 13 dB,axial ratio(AR)is less than 3 dB,the gain is greater than 15 dBic,the sidelobe levels of the xoz-plane and yoz-plane are better than the 12.5 dB and 12.5 dB respectively,and the pattern is stable.The designed antenna array is compact and easy to be processed,which has a good prospect in satellite communica-tion applications(SATCOMs).
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