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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