| 本帖最后由 herosyfj 于 2013-11-1 01:25 编辑 
 
 CSR官方天线资料:Inverted-F and Meander Line Antennas.pdf中的一段话如下(参见附图): 
 Proximity to Metal Objects CSR recommends keeping metal objects as faraway from the antenna as possible. Keeping metallic objects out of the nearfield is  usually adequate. Near Field = 2D2/ λ    D is the largest dimension of the antenna. In the case of these antennas, this isapproximately a quarterwave (λ/4). 
 Notes: λis the wavelength of the signal in freespace. At Bluetooth frequencies, λ=122mm infreespace. Substituting D=λ/4 into theNear Field equation gives Near Field =λ/8. Near Field = 122/8 mm = 15.25mm. 
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 本人对上述这段话的理解是:曲流型天线和金属物品的距离不能小于15.25mm。 不知本人的理解是否正确,还请大侠指点! 
 谢谢! 
 
 附图: 
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