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给出了一种基于电磁(光子)晶体基底的新型贴片天线.用时域有限差分法(FDTD)研究了该新型天线的表面波以及阻抗、辐射方向图、带宽和增益等;并将它们与普通贴片天线进行了比较.结果表明,光子晶体结构对表面波的抑制非常明显,从而改善了天线的性能,包括增加了天线的带宽,提高了向前辐射的增益,削弱了沿基底方向(90°侧面方向)的辐射等.
A new type of patch antenna based on electromagnetic (photonic) crystal substrate is presented. The surface wave, impedance, radiation pattern, bandwidth and gain of the new antenna are studied by finite difference time domain (FDTD) The results show that the photonic crystal structure can significantly suppress the surface wave and improve the performance of the antenna, including increasing the bandwidth of the antenna, increasing the gain of the forward radiation and weakening the direction of the substrate along the substrate 90 ° side direction) of radiation and the like.