Friday 15 February 2019

pcb - RF microstrip track parameters calculation


I am currently finishing the design of a board where there are two antenna microstrip on the surface of the top layer. I have a 4 layer PCB. I use FR4,so I suppose dielectric is 4.6. Thickness of the board is programmed to be 1.6mm, with the following stack



enter image description here One is for GPS function and another one is for GSM function.


The manufacturer of the modules specify that control corresponding W and S of 50ohm coplanar waveguide. How do I calculate Track width (W), separation to coplanar ground (S) ? I have saturn pcb software but I don't know if I can achieve this calculation with it ?


When answering, I would really appreciate if you can detailed by a simple 1-2-3 step process, how you process to perform the necessary calculation to determinate those parameters.




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