Richard Clark wrote in
:

....

Thus, we would have a tripole antenna with three off-centers.

Richard, are you sure you didn't serve an apprenticeship in the marketing
department?

So could you calculate the advantage as 20log(tripole/dipole), or is it
just 10log(tripole/dipole)? Maybe the FCC's bodgy 40*log?

The common mode path to dirt helps to tame VSWR excursions, between that
and a lossy voltage balun at the feedpoint, you might keep VSWR under 1.5.
And a bodged interpretation of Mismatch Loss could let the seller claim,
VSWR1.5, no expensive lossy tuner, MismatchLoss0.2dB.

Owen