Reg Edwards wrote:
Regardless of its other dimensions, the primary requirement of a
mismatched connector is that its length should be appreciably less
than 1/4-wavelength at the highest working frequency.
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Yes, at HF the reflections from one impedance discontinuity
and the reflections from a complimentary impedance discontinuity
3 inches away almost entirely cancel each other.
--
73, Cecil
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Reflections are functions of TIME, not frequency.

Oliver Heaviside had the right idea long before the invention of the
SWR meter.
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Reg, G4FGQ.