This paper discusses the design of a low-profile Hilbert-shaped metamaterial (MTM) array-based printed circuit antenna forming a rectangular patch and backed by a partial ground plane; the rest of which is loaded with a square Electromagnetic Band Gap (EBG) structure for RF energy harvesting. The antenna is mounted on a 28 mm × 32 mm nickel oxide polymerized palm fiber (INP) substrate and compared to the identical one based FR4 substrate. The two prototypes are printed with silver nanoparticles (SNP). The antenna performance is tested numerically and experimentally in terms of S₁₁ and radiation patterns. The obtained antenna gain bandwidth product of the INP prototype is found significantly better than the FR4 prototype. The proposed INP antenna gain at 5.8 GHz and 8 GHz frequencies are found about 4.56dBi and 7.38dBi, respectively. While, the FR4 antenna gain is found 4.56dBi and 6.85dBi at 5.8 GHz and 8 GHz, respectively. Finally, the collected output DC voltage and the conversion efficiency from the harvested RF energy are measured experimentally at 5.8 GHz and 8 GHz for both proposed prototypes.

本文讨论了一种低轮廓的基于希尔伯特形超材料（MTM）阵列的印刷电路天线的设计，该天线形成一个矩形贴片并以部分接地层作为支撑。其其余部分装有方形电磁带隙（EBG）结构，用于收集RF能量。天线安装在28 mm×32 mm的氧化镍聚合棕榈纤维（INP）基板上，并与相同的基于FR4的基板进行比较。这两个原型都印有银纳米颗粒（SNP）。天线性能根据S ₁₁进行了数值和实验测试和辐射图。发现获得的INP原型的天线增益带宽积明显好于FR4原型。提议的INP天线在5.8 GHz和8 GHz频率下的增益分别约为4.56dBi和7.38dBi。而FR4天线增益在5.8 GHz和8 GHz时分别为4.56dBi和6.85dBi。最后，对于两个建议的原型，分别在5.8 GHz和8 GHz上实验测量了收集的输出DC电压和来自收集的RF能量的转换效率。