1.一个空心金属球,球的半径是1m,材料为损耗银(FEKO材料库自带),厚度为2.5nm。
2.平面波激励 ,theta=90, phi=180,频率为1-100MHz
3.求解球中心点的近场屏蔽因子。
4.网格剖分选取标准auto-mesh。
5.分别采用MoM计算,和FEM算法 计算结果。其中,采用FEM算法时,注意:set the region of both spheres to air. A dielectric material is used with the properties of free space instead of using the free space medium directly to ensure that the region is meshed as a tetrahedral volume for the FEM.
6.案例主要关心的是金属球的屏蔽能力,因此计算球内的场强和入射源的场强的比值。 The incident field strength was set as Ei = 1 V/m. The incident magnetic field can be calculated: Hi = Ei / n0 =1 / 376.7 = 2.6544e-3.
The shielding factor is therefore:
Se = -20*log(E / Ei) ;
Sh = -20*log(H / Hi) .
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FEKO 7.0V