Homebrew HF SWR/Power Meter - 285 TechConnect Radio Club
Homebrew HF SWR/Power Meter - 285 TechConnect Radio Club
Homebrew HF SWR/Power Meter - 285 TechConnect Radio Club
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•<strong>SWR</strong> Calculation<br />
•Not a direct measurement<br />
5/4/2012<br />
<strong>SWR</strong> =<br />
1+<br />
1-<br />
P R<br />
P F<br />
P R<br />
P F<br />
Theory<br />
=<br />
E F<br />
+<br />
E F -<br />
E F = Forward Voltage<br />
E R = Reverse Voltage<br />
P F = Forward <strong>Power</strong><br />
P R = Reverse Voltage<br />
<strong>SWR</strong> accuracy is only as good as the power measurement<br />
accuracy (both Forward & Reflected)<br />
E R<br />
E R
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