The VSWR of a VHF system with a forward power of 100W and a reflected power of 4W will be
- 1.5:1
- 2:1
- 2.5:1
Explanation
The voltage reflection coefficient is the square root of the power ratio, so the square root of 4/100 equals 0.2. VSWR is (1 plus 0.2) divided by (1 minus 0.2), which is 1.2/0.8, giving 1.5:1. This low ratio indicates a well-matched antenna feeder.
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Community Comments (2)
D
dimky Posts: 514 31.08.2013 / 15:04
VSWR = (1 + square_root(Prev / Pfor)) / (1 - square_root(Prev / Pfor))
Prev = forward power
Pfor = reflected power
Prev = forward power
Pfor = reflected power
D
dimky Posts: 514 01.09.2013 / 12:40
Good online calculator: http://www.csgnetwork.com/vswrlosscalc.html
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