In this article, two miniaturized, dual‐band, enhanced gain, flexible, low specific absorption rate (SAR) artificial magnetic conductor (AMC) integrated antennas operating at 2.4 GHz ISM and 3.9 GHz WiMAX bands have been proposed. Two compact monopoles with defected stepped ground structures have been used to improve the radiation characteristics while integrated with a common AMC surface. Defected dumbbell shaped unit‐cell has been designed to obtain zero reflection phase and modify the material features. The capacitive effect of the AMC along with the defected stepped ground structures of the monopoles have excited two resonating bands and miniaturized the antennas. Proposed AMC has compensated the out‐of‐phase radiation toward main beam direction to increase the gain up to 8.6 dB, which is 85% more than that of the only monopole. The AMC has enhanced the reflectance exploiting the double‐negative property and made the emitted radiation more directives. The integrated antennas have bestowed robust impedance matching in various bent condition by virtue of in phase reflection property. SAR values have been suppressed significantly up to 0.021 W/kg at a distance 5 mm from the human body, which is 99.5% better than that of the monopole alone

中文翻译：

---

使用人造磁导体层设计天线以提高增益，灵活性和比吸收率

本文提出了两种工作在2.4 GHz ISM和3.9 GHz WiMAX频段的小型化，双频，增强增益，灵活，低比吸收率（SAR）人造磁导体（AMC）集成天线。当两个有缺陷的阶梯状接地结构的紧凑单极子与一个公共AMC表面集成在一起时，已被用来改善辐射特性。变形的哑铃状晶胞经过专门设计，可实现零反射相位并修改材料特征。AMC的电容效应以及单极子的有缺陷的阶梯状接地结构激发了两个谐振带并使天线小型化。拟议的AMC已补偿了朝向主波束方向的异相辐射，从而将增益提高到8.6 dB，比唯一的单极天线多了85％。AMC利用双重负特性提高了反射率，并使发出的辐射更具指示性。集成天线凭借同相反射特性，在各种弯曲条件下都具有强大的阻抗匹配能力。在距人体5毫米的距离处，SAR值已被显着抑制，最高可达0.021 W / kg，比单极子的SAR值高99.5％。