Miniaturization Techniques Using Magnetic Materials for Broadband Antenna Applications
Miniaturization Techniques Using Magnetic Materials for Broadband Antenna Applications
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DOI：
10.1109/tmag.2019.2894644
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发表时间：
2019-07-01
影响因子：
2.1
通讯作者：
Afsar, Mohammed N.
中科院分区：
文献类型：
--
作者：
Durbha, Ravi;Afsar, Mohammed N.
本文基于 W. B. Weir 提出的基于 T/R 的波导测量技术，研究了分析固体磁性材料的频率相关复杂参数所需的仪器。根据使用矢量网络分析仪测量的传输和反射系数的幅度和相位值，使用定义的表达式计算复介电常数和磁导率。计算复杂参数作为具有所需步长的频率函数所需的方程是从实验结果导出的。为了验证为复合磁性材料开发的数学表达式，提出了使用现成磁性材料的紧凑型 2-18 GHz 背腔螺旋天线的设计。在 ANSYS HFSS 软件中对腔体以及不同尺寸的高对比度磁性材料堆叠的电气性能进行建模和仿真。
This paper investigates the instrumentation necessary to analyze frequency-dependent complex parameters of solid magnetic materials based on T/R-based waveguide measurement technique proposed by W. B. Weir. Based on the magnitude and phase values of transmission and reflection coefficients measured using vector network analyzer, complex permittivity and permeability are calculated using the expressions defined. Equations necessary for calculating the complex parameters as a function of frequency with required step size are derived from the experimental results. To validate mathematical expressions developed for composite magnetic materials, the design of a compact 2-18 GHz cavity-backed spiral antenna using off-the-shelf magnetic materials is presented. The electrical performance of the cavity along with stack of high contrast magnetic materials of varying dimensions is modeled and simulated in ANSYS HFSS software.