Differential microstrip traces on layer 1 (highlighted in red in Figure 6) referenced to ground on layer 3 should be 100 Ω ± 10%. The trace width is 9.9 mm, and the spacing is 8 mm.$ M b9 i1 V% f- p& k1 ~
第一层的差分微带线以第三层地做参考?一般不是以临近的平面做参考吗?还有线的宽度应该是mil吧