Just set the distance to the plane very high, such as 1000mm.
Regards,
Steve.
At 05:49 PM 7/1/99 +0000, you wrote:
>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
>
>
>----------
>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
>
>
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