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中文摘要：
提出了一种新型双频段磁电偶极子天线。通过一对印刷在介质板上的金属贴片与金属地板垂直相连形成磁偶极子，2组尺寸不同的印刷振子形成电偶极子并产生2个谐振频段，构成了双频段磁电偶极子天线。采用微带线一平行双线巴伦的馈电方式实现了不平衡到平衡馈电的转化，以便于给磁偶极子和电偶极子同时馈电，该馈电方式可使天线的整体尺寸更小、结构更加紧凑，有利于天线结构和馈电结构一体化设计。实测和仿真结果表明：在2．29～3．13GHz和4．70～5．85GHz的工作频带内，天线具有良好的方向性、稳定对称的辐射方向图、低交叉极化和低后瓣特性。
英文摘要：
This paper proposes a novel dual band magneto-electric dipole antenna.Two groups of printed e- lectric dipoles with different sizes excite two resonant bands and a pair of metal patches printed on a sub- strate,which are connected to the metal ground plane,to form the magnetic dipoles.A microstrip-to-parallel -stripline balun is employed to transfer the unbalanced feed to balance feed so that the electric and magnetic dipoles could be excited simultaneously. The use of this feed method can make the antenna smaller, more compact and beneficial for the integration of the antenna and the feed structure.The results of measurement and simulation indicate that within operating bands 2.29 ～3.13 GHz and 4.70 ～5.85 GHz the antenna shows a good directivity, stable and symmetrical radiation pattern, and low cross polarization and low back radiation.
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