Dear experts,

Thanks for your reply. I am sorry that I did not explain my question clearly.

Here the flexible PCB has not a ground plane. The transmission line is made from only two parallel traces, just like twisted pair wire.

I've tried Polar, rapideigner, etc, however it seems that there is not such a situation? Please point out if I've missed sth.

Thanks and look forward to your reply.
Cai


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Sent:   Thursday, July 01, 1999 2:54 PM
Subject:        [SI-LIST] : Transmission line made from Parallel tracks on Flexible PCB

Dear Experts,

Could you tell me how to calculate the impedance of two parallel tracks on flexible PCB? Is there any simple formulae or tool available?

Thanks,
Cai