See...
>
>Newsgroups: alt.binaries.schematics.electronic
>Subject: Smith Chart Amusements - SmithChartDoodles.JPG
>Message-ID:
>
>I'm trying to remember from 40+ years back, when I last used a Smith
>Chart... what do the circular patterns mean?
>
>I suspect that they are perhaps due to a distributed R-L-C network?
>
>What think ye all?
>
> ...Jim Thompson
The circles about the "origin"/center are lines of constant impedance through all phase angles. The other circular lines are about "constant" reactances/susceptances or "resistances"/conductances. The angles from a direct line to the right from the origin represent things akin to phase/time/fractional wavelength.
Does this help?