一种改进的实验技术，利用空腔微扰研究了8.5 GHz x波段几种损耗材料的绝缘特性

IF 3 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Magnetism and Magnetic Materials Pub Date : 2025-08-06 DOI:10.1016/j.jmmm.2025.173429

S. Maiti , A.K. Pradhan , S.K. Biswas , S. Gangopadhyay , A. Banerjee , P. Roy Chowdhury

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引用次数: 0

摘要

利用8.5 GHz频率的q扼单虹膜矩形铜腔谐振器，实验研究了聚四氟乙烯、电木和丙烯酸基片的绝缘性能。随后，利用ANSYS HFSS进行了系统的仿真研究，以合理化介电特性的传统实验设计所产生的误差。三维电磁仿真研究被广泛用于优化虹膜和q -扼流圈直径。对5种常用低损耗介质材料在x波段7个离散频率下的复介电常数进行了模拟，结果表明，当衬底直径限制在1.0 ~ 4.0 mm范围内时，在8.5 GHz处的复介电常数精度最佳。此外，利用铁氧体磁铁（例如Y35）在不同样品半径（RS≤0.6mm）下的绝缘特性，揭示了所提出谐振器的新颖性。此外，在传统的微扰公式中加入了校正因子，以补偿由于样品位置从各自腔中心的任何变化而产生的误差。三种特定材料介电常数特性的模拟和实验结果与以往的报告和标准规范更加吻合。

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An improved experimental technique employing cavity perturbation to investigate the insulating properties of a few lossy materials at 8.5 GHz in X-band

The insulating properties of cylindrical Teflon, Bakelite and Acrylic substrates have been investigated experimentally using a Q-choked single iris rectangular copper cavity resonator at 8.5 GHz. Subsequently a methodical simulation studies have been performed using ANSYS HFSS to rationalize the errors originated from the conventional experimental design for dielectric characterizations. The 3-D electromagnetic simulation studies are extensively used for the optimization of iris and Q-choke diameters. The simulated complex dielectric permittivity derived for five commonly used low loss dielectric materials at seven discrete frequencies within X-band demonstrate an optimum accuracy at 8.5 GHz when substrate diameter is restricted within 1.0–4.0 mm. Additionally, using the insulating properties of ferrite magnet (e.g., Y35) at distinct sample radius (

R_{S} \leq 0.6 m m

) unvail the novelty of the proposed resonator. Moreover, a correction factor is added to the conventional perturbation formula to compensate the errors arisen due to any change in sample position from respective cavity centre. Both the simulation and experimental results of permittivity characteristics for the three specified materials of interest show even better agreement with the previous reports and standard specifications.

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来源期刊

Journal of Magnetism and Magnetic Materials 物理-材料科学：综合

CiteScore

5.30

自引率

11.10%

发文量

1149

审稿时长

59 days

期刊介绍： The Journal of Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics, from basic magnetism to the technology and applications of magnetic materials. The journal encourages greater interaction between the basic and applied sub-disciplines of magnetism with comprehensive review articles, in addition to full-length contributions. In addition, other categories of contributions are welcome, including Critical Focused issues, Current Perspectives and Outreach to the General Public. Main Categories: Full-length articles: Technically original research documents that report results of value to the communities that comprise the journal audience. The link between chemical, structural and microstructural properties on the one hand and magnetic properties on the other hand are encouraged. In addition to general topics covering all areas of magnetism and magnetic materials, the full-length articles also include three sub-sections, focusing on Nanomagnetism, Spintronics and Applications. The sub-section on Nanomagnetism contains articles on magnetic nanoparticles, nanowires, thin films, 2D materials and other nanoscale magnetic materials and their applications. The sub-section on Spintronics contains articles on magnetoresistance, magnetoimpedance, magneto-optical phenomena, Micro-Electro-Mechanical Systems (MEMS), and other topics related to spin current control and magneto-transport phenomena. The sub-section on Applications display papers that focus on applications of magnetic materials. The applications need to show a connection to magnetism. Review articles: Review articles organize, clarify, and summarize existing major works in the areas covered by the Journal and provide comprehensive citations to the full spectrum of relevant literature.