如何处理谐振器的辐射问题

1、有吸波材料；2、可局部屏蔽

吸波材料的办法比较有效，可以试试

客户的应用是一个射频发射模块，发射频率是6,.78MHz，客户试过一些铁氧体，他说会到铁氧体会解调谐振器，影响发射状态？我贴客户原文给各位看看，请大家帮帮我处理这个问题。。。

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Our power is transmitted at 6.78MHz and since our resonators are flat on a surfaces the H fields are seen above and below the resonator which can expose a user’s legs the high levels of H field.  We only want to reduce the H fields underneath the table without boosting or attenuating the fields above the table.  We have tested with some absorber materials at different thicknesses and found that they will detune the resonator so much that the transmitter will go into a fault condition.

Currently we are using a 0.3 FSSX ferrite on top of a layer of copper underneath the entire unit roughly 15mm down from the resonator.  We are looking for the following:

1.        Material we can place 10mm from the bottom of the resonator without detuning the system
2.        Samples needed for testing asap
3.        Again, we thought absorbers would work but we have not seen anything good
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局部屏蔽怎么讲？

我回的帖子怎么不见了？

客户的应用是一个射频发射模块，发射频率6.78MHz，他们用了铁氧体，但是会影响到谐振器，我贴下他的原文，版主帮我分析分析呐~~~

表示英文看不懂。

我跟您讲讲，客户的需求是减少SAR，过FCC的测试指标，他用铁氧体吸波片贴在离主板15mm的地方，但是遇到一个问题，铁氧体因为加感效应与谐振路线的距离过短（15mm）会干扰主频，他想知道铁氧体片离谐振器多远的距离既可以不干扰主频（解调谐振）又能导磁吸波？

化二说的有理，用吸波材料和局部屏蔽都是为了不让下面的噪声向再发射，起到隔离作用！