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Download Analog,RF and EMC considerations in printed wiring board by Colotti J. PDF

By Colotti J.

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Copper: 1 oz, electrodeposited 2. 50, height: 30 mils 3. 2 pF/in Inductance 42 x 42 60 x 60 (≈ 0603) (≈ 0805) Notes: 1. Copper: 1 oz, electrodeposited, strip-line. 2. 025, height 10 mils. 45 Notes: 1. R in mΩ , L in nH, C in pF 2. Dimensions are in mils. 3. Planes are evenly spaced. 4.

1564 0 . 35 b−t Copyright Telephonics 2002-2005 31 Impedance Examples ♦ Symmetrical Strip-Line ♦ Asymmetrical Strip-Line ♦ Micro-Strip 50 Ω, 11 mils wide (30 mil dielectric) 50 Ω, 9 mils wide (10+20=30 mil dielectric) 50 Ω Micro-Strip, 54 mils wide (30 mil dielectric) Notes: 1. Copper: 1 oz, electro-deposited 2. 503 FR4 dielectric loss exceeds copper loss at 1 GHz Notes: 1. Copper: 1 oz, electrodeposited, 10 mil width, 50 Ohms, strip-line 2. 025, height 28 mils 3. 004, height 22 mils 4. Loss units are dB/inch Revision 4 Copyright Telephonics 2002-2005 34 Conductor Loss DC Resistance R DC = ρ l l = ρ tw A l R DC = 0 .

Copper: 1 oz, electrodeposited, 10 mil width, 50 Ohms, strip-line 2. 025, height 28 mils 3. 004, height 22 mils 4. Loss units are dB/inch Revision 4 Copyright Telephonics 2002-2005 34 Conductor Loss DC Resistance R DC = ρ l l = ρ tw A l R DC = 0 . 6 Ω (0 . 0014 in )(0 . 010 in ) R DC = 0 . 3 Ω (0 . 0007 in )(0 . 005 in ) A t w Skin Depth δ = δ = δ = Revision 4 ρ π fµ 0 •Current density drops to 37% (1/e) •Ignore if t<2δ 0 . 0172 µ Ω m = 660 nm = 0 . 03 mils  −7 Ω s  π (10 GHz ) 4π x10  m   0 .

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