Thread: CB radio - SWR problems
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Old 30-01-2005, 23:52   #14
Matth
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Re: CB radio - SWR problems
With an angled groundplane, the coax should stay within the groundplane, or it will pick up RF and disturb the characteristics.

It can also help, to add a coil of a few turns at the the minimum acceptable bend radius of the coax, as this chokes any RF on the outer that can cause SWR meters to mis-read.

One thing though, if the antenna would be a perfect match with a good ground or a flat groundplane, an angled groundplane will raise the impedance.
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