Elwi Taha A
Department of Communication Engineering, Al-Mammon University College, Baghdad, Iraq.
Sci Rep. 2019 Feb 18;9(1):2174. doi: 10.1038/s41598-019-39736-8.
In this paper, the novelty of exploring the applications of the Iraqi Palm Tree Remnants (IPTR) mixed with Nickel Oxide Nanoparticles (NONP) hosted in Polyethylene (PE), called INP substrates, is utilized by printing metamaterial (MTM) based high gain microwave antennas on them. The proposed INP substrates are mainly created from pressed flexible organic fibers to suite the ink jet printing technologies. The complex relative constitutive parameters are characterized in terms of permittivity (ε) and permeability (μ) within the frequency range from 2 GHz up to 6 GHz using an open end dielectric probe and a T-stub transmission line technique. To validate the feasibility of the INP substrates, a very fine antenna structure of based a miniaturized Hilbert MTM based dipoles is printed on. A material printer with Sliver Nanoparticles Conductive Ink (SNPCI) is used to print the antenna structure. Commercial software packages, CST Microwave Studio (MWS) and Ansys High Frequency Structure Simulator (HFSS), are used to simulate the proposed antenna based on the measured constitutive parameters. A negligible difference is found between the measured and simulated results. Finally, an attractive effect on the retrieved constitutive parameters of the proposed MTM is found due to the proposed INP substrate.
在本文中，探索将伊拉克棕榈树残余物（IPTR）与负载于聚乙烯（PE）中的氧化镍纳米颗粒（NONP）混合而成的称为INP基板的材料的应用的新颖性，通过在其上印刷基于超材料（MTM）的高增益微波天线来实现。所提出的INP基板主要由压制的柔性有机纤维制成，以适应喷墨印刷技术。使用开口端介质探针和T型短截线传输线技术，在2 GHz至6 GHz的频率范围内，根据介电常数（ε）和磁导率（μ）对复相对本构参数进行了表征。为了验证INP基板的可行性，在其上印刷了基于小型化希尔伯特MTM的偶极子的非常精细的天线结构。使用带有银纳米颗粒导电墨水（SNPCI）的材料打印机来印刷天线结构。商业软件包CST微波工作室（MWS）和Ansys高频结构模拟器（HFSS）用于根据测量的本构参数对所提出的天线进行模拟。在测量结果和模拟结果之间发现了可忽略不计的差异。最后，由于所提出的INP基板，发现对所提出的MTM的恢复本构参数有显著影响。
