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Design >> RF Design >> Substarte parameters for ADS linecalc
https://designers-guide.org/forum/YaBB.pl?num=1384899979

Message started by mixed_signal on Nov 19^th, 2013, 2:26pm

Title: Substarte parameters for ADS linecalc
Post by mixed_signal on Nov 19^th, 2013, 2:26pm

Hi,
I want to use ADS linecalc for designing a coplanar wave guide on a PCB but the vendor website tells only this :
2-Layers, FR-4, 0.062", 1 oz. cu. plate

Where do i get substrate parameters? If I plug in values for FR4 from wikipedia , will it work. Doesn't they vary from manufacturer to manufacturer?

Title: Re: Substarte parameters for ADS linecalc
Post by aaron_do on Nov 19^th, 2013, 5:13pm

Hi,

if memory serves, you just need to know the loss tangent and the dielectric constant. You can google it or yeah use the values from wikipedia, but as I remember, the loss tangent of FR4 can vary widely. Also, it has been a while since I did this, but I believe ADS momentum will give you a more accurate result.

regards,
Aaron