Plotting stability circles on Smith chart

Hi,
I need help on plotting stability circles on a smith chart. If anyone has any easy tutorial or suggestions for reading....please....got a test on monday!

You have an excellent tutorial here:

http://www.rfic.co.uk/

Look under RF & Microwave Theory - Stability.

reference book: Rf Circuit Design Theory and Applications

or can use the ADS of Agilent
plot the stability circle

Download Smith Software at www.hta-be.bfh.ch/~dellsper
the help has also theory on that subject

here the new freeware ver.

for the last one you have to pay
it is a demo


RGZ