(capacitive reactance) to +0.3 (inductive reactance) on. If you use Z0=Zt=sqrt(Zout*Zin), then Zt will be in the center of Smith Chart, so maybe it useful somehow for using Smith chart without any formulas.1498 1869 5 2 4 1 96/1 96/1 2 8 8 8 8 Paint.NET v3. To get to the yellow dot on the impedance chart, the dot moved on resistive circle of 0.1 from 0.5. Regarding scaling you referred to: It may be just using non 50 Ohm characteristic impedance for a Smith chart. When we removing physical length by cutting θ length of line, signal will come earlier be 2*θ, we go counter-clockwise. So when adding physical length θ, we go clockwise (delaying output by 2*θ). So adding line with some characteristic impedance Z0 with θ phase length will delay reflected signal by 2*θ degrees (on a smith chart with center at Z0). When we physically add λ/4 line line to output of transistor, we will delay reflection signal two times by 90° (signal enters newly added λ/4 line, travels 90°, reflects from transistor s22, travels 90° degree in opposite direction through the same λ/4 line). Real physical place on a PCB board, for example output of transistor. Let's start from some reflection coefficient Г for this impedance. Similarly, solving for R (I used Equation 2) will get you solutions that look like this: R BX(BX2)B B R B X ( B X 2) B B.
By varying the value of R in this equation, you can draw each of the circles in the Smith Chart. My explanation: on a Smith chart reflection coefficient Г phase decreases in clockwise direction. It's a circle, with a radius of 1 R+ 1 1 R + 1 and a center of ( R R+1, 0) ( R R + 1, 0). I do not like these "toward generator" rules. Rules are:ġ) Moving towards the generator - clockwise rotation on a Smith chartĢ) Moving towards the load -counter-clockwise rotation on a Smith chart My thoughts on "moving towards the generator" / "moving towards the load impedance" rules. Smith Chart Basics 1 0 +1 )+,-./-+ Z norm0.0 Open,-./-+ Z norm 50 Load Z norm1.
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