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narrow band transistor matching

narrow band transistor matching

(OP)
I was wondering if i could get some help with the smiths chart.When you enter the smith chat using the s11 parameters for a single stub base network,how do you decide the length of the line on the smith chart.

RE: narrow band transistor matching

A full circle around the perimeter of the Smith Chart (360 degrees) corresponds to a half wavelength (i.e. 180 degrees, or PI radians) at your frequency of interest.  Note the text "Wavelength toward generator/load" on the edge of the chart.   

"RF Circuit Design" by Chris Bowick, SAMS Publishing, ISBN 0-672-21868-2 is a very good reference on the Smith Chart if it is still available.  

Z
 

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