A metamaterial loaded circularly polarized fractal boundary patch antenna is investigated for applications at the ISM band. The suggested patch comprises of Minkowski fractal over metamaterial inspired reactive impedance substrate. Initially, asymmetrical Minkowski fractal curves are deployed at the edges of a square patch for generating the circular polarization (CP). Later, using metamaterial reactive impedance substrate as antenna loading, CP bandwidth is enhanced. The characteristics of the Minkowski fractals are adjusted to obtain the pure CP radiation. The metamaterial loaded Koch fractal antenna is also studied for CP emission. Minkowski antenna with fractal reactive impedance surface as metamaterial with iteration 1 is experimentally examined. The achieved 10-dB return loss and 3-dB axial ratio bandwidths are 40.7% and 7.47%, respectively.

研究了加载超材料的圆极化分形边界贴片天线在 ISM 频段的应用。建议的贴片由受超材料启发的电抗阻抗基板上的闵可夫斯基分形组成。最初，在方形贴片的边缘部署不对称的闵可夫斯基分形曲线以生成圆偏振（CP）。后来，采用超材料电抗阻抗基板作为天线负载，增强了CP带宽。调整 Minkowski 分形的特征以获得纯 CP 辐射。还研究了加载超材料的科赫分形天线的 CP 发射。对以分形无功阻抗表面作为超材料的闵可夫斯基天线进行了迭代 1 的实验检验。所实现的 10dB 回波损耗和 3dB 轴比带宽分别为 40.7% 和 7.47%。