CALCULATION OF SELF AND MUTUAL IMPEDANCES IN PLANAR MAGNETIC-STRUCTURES
CALCULATION OF SELF AND MUTUAL IMPEDANCES IN PLANAR MAGNETIC-STRUCTURES
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DOI：
10.1109/20.390151
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发表时间：
1995-07-01
影响因子：
2.1
通讯作者：
DUFFY, MC
中科院分区：
文献类型：
--
作者：
HURLEY, WG;DUFFY, MC
在滤波器等应用中，磁性元件的高频工作特性使其与电阻器和电容器沿着成为厚膜技术的理想选择。这反过来又导致了劳动密集型绕线组件的明显优势：提高了可靠性，可重复性，准确性和相应的成本降低。本文建立了铁磁衬底上平面线圈自阻抗和互阻抗的一组新公式。空气中的平面线圈是广义公式的特殊情况。这些公式是直接从麦克斯韦方程推导出来的，因此可以作为更简单近似的有用尺度。该公式充分考虑了线圈截面上的电流密度分布和衬底中的涡流损耗。本文给出了一个厚度为150 μ m、面积为40 mm（2）、每层有三匝的四层器件的阻抗实验和计算结果，阻抗可达100 MHz。
The high frequency operation of magnetic components, in applications such as filters, makes them ideal candidates for thick him technology along with resistors and capacitors. This in turn leads to distinct advantages over labor intensive wire wound components: improved reliability, repeatability, accuracy and consequential cost reductions. This paper establishes a new set of formulas for the self and mutual impedances of planar coils on ferromagnetic substrates. A planar coil in air is a special case of the generalized formulas. The formulas are derived directly from Maxwell's equations and therefore serve as a useful yardstick for simpler approximations. The formulas take full account of the current density distribution in the coil cross-section and the eddy current losses in the substrate. Experimental and calculated impedances up to 100 MHz are presented for a four layer device with three turns per layer which is 150 mu m thick and 40 mm(2) in area.