今天小编要和大家分享的是布线技巧与EMC相关信息，接下来我将从I would like to calculate the，current-free synthesis of improved parameter-free zero-impedance这几个方面来介绍。
布线技巧与EMC相关技术文章I would like to calculate the
I would like to calculate the trace width to impedance
Problem I am working on a four layer circuit board that will contain some RF traces and would like to know the layer stack-up and spacing that you use in order to calculate the trace width to impedance numbers
Solution 2-Layer PCB - 0.031" finished thickness Layer 1 - Copper - 0.0014" thick (1 oz. copper weight)Core material - 0.028" thick - Dielectric Constant of 4.7Layer 2 - Copper - 0.0014" thick (1 oz. copper weight)
2-Layer PCB - 0.062" finished thickness
Layer 1 - Copper - 0.0014" thick (1 oz. copper weight)Core material - 0.059" thick - Dielectric Constant of 4.7Layer 2 - Copper - 0.0014" thick (1 oz. copper weight)* Layer 1 & 2 copper thickness will be 0.0035 for a 2.5 oz. copper weight configuration
4-Layer PCB - 0.062" finished thickness
Layer 1 - Copper - 0.0014" thick (1 oz. copper weight)Laminate (prepreg) - 0.0115"-0.0129" thick - Dielectric Constant of 4.6Layer 2 - Copper - 0.0014" thick (1 oz. copper weight)Core material - 0.028" thick - Dielectric Constant of 4.7Layer 3 - Copper - 0.0014" thick (1 oz. copper weight)Laminate (prepreg) - 0.0115"-0.0129" thick - Dielectric Constant of 4.6Layer 4 - Copper - 0.0014" thick (1 oz. copper weight)
6-Layer PCB - 0.062" finished thickness
Layer 1 - Copper - 0.0014" thick (1 oz. copper weight)Laminate (prepreg) - 0.007" thick - Dielectric Constant of 4.6Layer 2 - Copper - 0.0014" thick (1 oz. copper weight)Core material - 0.014" thick - Dielectric Constant of 4.7Layer 3 - Copper - 0.0014" thick (1 oz. copper weight)Laminate (prepreg) - 0.010" thick - Dielectric Constant of 4.6Layer 4 - Copper - 0.0014" thick (1 oz. copper weight)Core material - 0.014" thick - Dielectric Constant of 4.7Layer 5 - Copper - 0.0014" thick (1 oz. copper weight)Laminate (prepreg) - 0.007" thick - Dielectric Constant of 4.6Layer 6 - Copper - 0.0014" thick (1 oz. copper weight)
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