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铈掺杂镍锌纳米铁氧体的合成与表征及其作为多频带多输入多输出天线的基底材料

Synthesis and characterization of cerium doped NiZn nano ferrites as substrate material for multi band MIMO antenna.

机构信息

Faculty of Engineering & Technology, The Islamia University of Bahawalpur, Bahawalpur, Pakistan.

Institute of Physics, The Islamia University of Bahawalpur, Bahawalpur, Pakistan.

出版信息

PLoS One. 2024 Jul 16;19(7):e0305060. doi: 10.1371/journal.pone.0305060. eCollection 2024.

DOI:10.1371/journal.pone.0305060
PMID:39012850
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11251584/
Abstract

In addressing issues related to electromagnetic interference, the demand for ferrite materials with exceptional magnetic and dielectric properties has escalated recently. In this research, sol-gel auto combustion technique prepared Nickel zinc ferrites substituted with cerium, denoted as Ni0.5Zn0.5Ce0.02Fe1.98O4.X-ray diffraction (XRD), Vibrating Sample Magnetometer (VSM), and Field Emissions Scanning Electron Microscope (FESEM) were used to investigate the structure, magnetic properties, and morphology of Cerium doped NiZn Nano ferrites, respectively. The magnetic and dielectric properties of the sample was examined within a frequency range of 2.5-5.5 GHz. Sample exhibits low permittivity (2.2), high permeability (1.4), low dielectric (0.35) and magnetic loss tangent (-0.5) and highest saturation magnetization measuring 30.28 emu/g. A Novel Double-band, 4x4 MIMO window grill-modeled antennas operating on 3.5 GHz and 4.8 GHz frequency bands for 5G smartphones is designed using the CST microwave studio suite. The performance of window grilled 4x4 MIMO antenna model with Cerium doped NiZn nano ferrites as substrate, is investigated and found the return loss of -35 and -32 dB, with the bandwidth of 200MHz, gain (1.89 & 4.38dBi), envelope correlation coefficient (0.00185), channel capacity loss (0.2bps/Hz), and interterminal isolation of (22& 19dB).The results show that the antenna size is reduced with improved bandwidth, higher isolation and better diversity gain performance using Cerium doped NiZn nano ferrite substrate compared to conventional dielectric substrates.

摘要

在解决与电磁干扰相关的问题时，最近对具有优异磁学和介电性能的铁氧体材料的需求有所增加。在这项研究中，使用溶胶-凝胶自燃烧技术制备了镍锌铁氧体取代铈的材料，记为 Ni0.5Zn0.5Ce0.02Fe1.98O4。X 射线衍射（XRD）、振动样品磁强计（VSM）和场发射扫描电子显微镜（FESEM）分别用于研究铈掺杂 NiZn 纳米铁氧体的结构、磁性能和形貌。在 2.5-5.5GHz 的频率范围内测试了样品的磁性能和介电性能。样品表现出低介电常数（2.2）、高磁导率（1.4）、低介电损耗（0.35）和磁损耗正切值（-0.5），最大饱和磁化强度为 30.28emu/g。采用 CST 微波工作室套件设计了工作在 3.5GHz 和 4.8GHz 频段的新型双频、4x4 MIMO 窗格模型天线，用于 5G 智能手机。研究了具有铈掺杂 NiZn 纳米铁氧体作为衬底的窗格 4x4 MIMO 天线模型的性能，发现回波损耗为-35 和-32dB，带宽为 200MHz，增益（1.89 和 4.38dBi），包络相关系数（0.00185），信道容量损耗（0.2bps/Hz）和端到端隔离度（22 和 19dB）。结果表明，与传统介电衬底相比，使用铈掺杂 NiZn 纳米铁氧体衬底可以减小天线尺寸，同时提高带宽、隔离度和分集增益性能。

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