Hello,


I am doing a project which have RF components in this. So i want to know that how to calculate 50 ohm transmission line trace width. This is my first RF project so need guidance about that. please help me regarding this.
I have to calculate the Transmission line Trace width for 50 ohm FR4 6 layer PCB. so i want to know that it is called micro-strip or strip-line?
i have check the calculators like Chemandy's , APPCAD. But confused between for what transmission line i have to calculate.
Please guide me for my first project as soon as possible as i have to start my work for that.


Thank you so much.

 

Strip line is a trace with grounds above an below it,
i.e. an inner layer.
micro strip is a trace above a ground,
i.e. an outer layer.

Take a look here for calculator,

https://www.allaboutcircuits.com/tools/symmetric-stripline-impedance-calculator/

 

Dear sir,
Thank u so much for your prompt reply.

I am doing my first RF project. i want the help regrading trace width calculations. I have to design 6 Layer PCB in FR 4 material which my first layer contains RF signals.

My layer stack up is like Signal, GND , Inner layer, Power , GND, Bottom.

I have query regarding the RF PCB design.

1) RF signal contains in 1st layer so which calculator used? co planner or Micro strip?
2) How RF Trace length important? any calculator for RF length calculation?


Please guide me as soon as possible as this is my first project and i have to submit it.

Thank you so much.