Skin Effect and Dielectric Loss Formulae - Signal Consulting · Skin Effect and Dielectric Loss...
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Slide S&D.1 copyright Skin Effect and Dielectric Loss Formulae Skin effect loss in percent-signal-loss per inch of trace Dielectric loss in percent-signal-loss per inch of trace 1 R SKIN (1GHz) f 2 Z 0 1GHz π f θ T D Loss tangent Trace delay per inch
Transcript of Skin Effect and Dielectric Loss Formulae - Signal Consulting · Skin Effect and Dielectric Loss...
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Skin Effect and Dielectric Loss Formulae
Skin effect loss in percent-signal-loss per inch of trace
Dielectric loss in percent-signal-loss per inch of trace
1 RSKIN(1GHz) f
2 Z0 1GHz
π f θ TD
Loss tangent
Trace delay per inch
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Skin Effect and Dielectric Loss Chart
107 108 109 1010
0.01
0.1
1
10
Stripline configuration(microstrip has a little less loss)
100-ohm differential pairs
Frequency (Hz)
Vertical signal loss (% per inch)
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Skin Effect and Dielectric Loss ExampleFiber Channel 1.06 Gb/s over 18” of FR-4
107 108 109 1010
0.01
0.1
1
10
Composite loss at max. data alt. rate of 530 MHz = 1% per inchLoss in 18 inches is 18%
For more accurate results use a 2-D field solver to computeskin loss and effective dielectricloss tangent
Frequency (Hz)
Vertical signal loss (% per inch)
