skin effect and dielectric los...

skin effect and dielectric lossSkin Effect and Dielectric Loss Formulae

Skin effect loss in percent-signal-loss per inch of trace
1 RSKIN(1GHz) 2 Z0 f 1GHz

Dielectric loss in percent-signal-loss per inch of trace
π f θ TD
Trace delay per inch Loss tangent

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Slide S&D.1

Skin Effect and Dielectric Loss Chart

10

1 Vertical signal loss (% per inch) 0.1

Stripline configuration (microstrip has a little less loss)

0.01 107

108

109

1010

Frequency (Hz)

100-ohm differential pairs
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Slide S&D.2

Skin Effect and Dielectric Loss Example Fiber Channel 1.06 Gb/s over 18” of FR-4

10

1 Vertical signal loss (% per inch) 0.1

For more accurate results use a 2-D field solver to compute skin loss and effective dielectric loss tangent

0.01 107

108 Freque