Sunstone Printed Circuit Board Forum

Good morning.

I've recently ordered a PCB from Sunstone and I'm trying to fit the measurements of the Vector Network Analyzer with the results obtained with the Agilent Design Systems 2011 software.

I've defined the substrate on the software as follows:

+ Thickness of the Rogers 4350 (measured in the laboratory) 0,020"
+ Dielectric constant: 3,66 (as Rogers 4350B indicates).
+ Thickness of the conductor : 1 oz (0,035 mm)
+ Type of the conductor: I assume that is Copper, but the PCB is Silver Plate Finishing. Does the silver plate finish indicates that the conductor is Silver?

When I compare both measurements and results, both doesn't fit. The frequency range in which I'm performing the measurements is 100 MHz until 4 GHz.

Am I defining correctly the substrate on ADS?

Thank you very much.

Néstor

Hello,

I am not 100% sure that the dialectric constant is the same as the listed 4350B material. This is the link to our website explaining what material we have. But I am unable to located the actual Construction information for this because of the holiday today.
Rogers Materials


That constant figure would be the only thing that I would question in the calculations of the Rogers material on our end. I will have the quality manager check up on this for you tomorrow and post a response once I find out if the 4350 is the same as the 4350B you have listed.

You do have the material specs right. The pcb material is .020" thick with a .0015" tolerance. The conductor is copper of 1 oz thickness and should be no less than .0014" on the top and bottom layers. Please contact customer support if you have any other questions.