[SI-LIST] Re: Conversion from dB to ohm

Bob,

I think transfer impedance should be:

Z12 = 25 * 10 ^ (S21/20), thus for S21 = -60dB, you have Z12 = 0.025 ohm.

Regards

Perry

Bob Patel wrote:

> Hi! The formula for conversion from ohm to dB is :
> Ztrans=25*10^(|S21|/20).
> So if S21=-60dB then Ztrans=25000, what is this value
> in i.e. units is in ohm but do I need to divide it
> with some factor to get in ohms.
> I am trying to convert and it is not corelating.
> Any inputs appreciated.
> Thanks
> Bob
>
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