On 06/12/2011 03:05 PM, walt wrote:


Assume a 50-ohm line terminated in a purely resistive 150-ohm load,
yielding a 3:1 mismatch with a voltage reflection coefficient Vñ equal
to 0.5 at 0°. We want to place a stub on the line at the position
relating to the unit-resistance circle on the Smith Chart. For a 3:1
mismatch this position is exactly 30° rearward from the load, and has
a voltage reflection coefficient Vñ equal to 0.5 at -60°. The
normalized line resistance at this point is 1.1547 chart ohms, or
57.735 ohms on the 50-ohm line, for a line impedance of 50 - j57.735
ohms.


Walt, I can only get your 1.0 - j1.1547 normalized impedance value
(looking into the line towards the normalized load of 3.0) if I move 60
degrees, not 30, from the load towards the generator. I'm also assuming
a lossless line. Sincerely, and 73s from N4GGO,


--
J. B. Wood e-mail: