PCB Layout
Table 5.3 Values of Constants for the Geometric Mean Distance of a Rectangle
t/w or w/t
0.000
0.025
0.050
0.100
0.150
0.200
0.250
0.300
0.350
0.400
0.450
0.500
0.500
0.550
0.600
0.650
0.700
0.750
0.800
0.850
0.900
0.950
1.000
0.000
K
LogeG
0.0
0.22313
0.22333
0.22346
0.22360
0.22366
0.22369
0.22369
0.22368
0.22366
0.22364
0.22362
0.22360
0.22360
0.22358
0.22357
0.22356
0.22355
0.22354
0.22353
0.22353
0.22353
0.223525
0.223525
0.0
0.00089
0.00146
0.00210
0.00239
0.00249
0.00249
0.00244
0.00236
0.00228
0.00219
0.00211
0.00211
0.00203
0.00197
0.00192
0.00187
0.00184
0.00181
0.00179
0.00178
0.00177
0.00177
0.0
Note: Sides of the rectangle are t and w. The geometric mean distance R is given by:
logeR = loge(t+w) - 1.5 + logeG. R = K(t+w), logeK = -1.5 + logeG.
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