本文介绍了一种通过加载电磁带隙结构（Electromagnetic band gap, EBG）反射板来辐射圆极化电磁波的偶极子天线。该EBG反射板由矩形单元组成75阵列，印制偶极子天线谐振中心频点是5.2GHz。从仿真结果看，该偶极子天线能够有效地辐射圆极化波，阻抗带宽达到了0.65GHz，极化带宽达到了0.13GHz，天线增益达到了7.8 dB。%In this paper, an electromagnetic band gap structure is designed as a reflector for a dipole antenna which can transmit circular electromagnetic wave. The reflector comprises an array of 75 triangular units, and the antenna works at 5.2GHz. The simulated results show that the proposed antenna radiate circular electromagnetic effectively, the impendence bandwidth is 0.65GHz, the polarization bandwidth is 0.13GHz, and the gain is 7.8dB.
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