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Analytical calculation for input impedance of a circularlypolarized ferrite disk antenna including higher order modes

机译:圆形边缘化铁氧体磁盘天线的输入阻抗的分析计算,包括高阶模式

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摘要

We propose an accurate analytical model for a circularly polarized antenna comprising a normally magnetized, grounded ferrite disk with a metalized top surface. The antenna is assumed to be excited by a conventional current probe. In the case of a thin ferrite disk, the electromagnetic fields of the dominant mode of the antenna do not vary in the direction normal to the disk. However, with increasing thickness of the ferrite disk, higher order modes start to affect antenna characteristics such as resonance frequency. This work presents an analysis of the structure that takes into account all higher modes of the antenna. To validate the theoretical calculations, HFSS simulations are performed. The antenna can be tuned by changing the magnetic bias field.
机译:我们提出了一种精确的分析模型,用于圆极化天线,该天线包括常磁的接地铁氧体盘,具有金属化顶表面。假设天线通过传统电流探头激发。在薄的铁氧体盘的情况下,天线的主导模式的电磁场不会在正常到磁盘的方向上变化。然而,随着铁氧体磁盘厚度的增加,高阶模式开始影响诸如共振频率的天线特性。这项工作提出了对考虑到天线的所有更高模式的结构的分析。为了验证理论计算,执行HFSS仿真。可以通过改变磁偏置场来调谐天线。

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