If the forward power and reflected power in a circuit are known, the SWR can be calculated. If the forward power is 380 W and the reflected power is 40 W, what is the SWR?

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Accepted Answer

SWR = [latex]\frac{1 + \sqrt{P_{R}/P_{F}}} {1 – \sqrt{P_{R}/P_{F}}}[/latex]

= [latex]\frac{1 + \sqrt{140/380}}{ 1 – \sqrt{140/380}}[/latex]

= [latex]\frac{1 + 0.324}{1 – 0.324}[/latex] = [latex]\frac{1.324} {0.675}[/latex] = 1.96

Question 22.2: If the forward power and reflected power in a circuit are kn...

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