This is not surprising, but you have low loss elements.
A 3/4 dB means that the overall efficiency of the antenna 1 in respect of
the antenna 2 is between 40 and 50%.
Considering that your element losss aren't dominant, the difference
developed lays mainly in the ground systems.
As the antenna element Rr decreases, the ground, as a series resistance in
the circuit becomes much more important and the differences between
different antennas may easily be much bigger than 3/4 dB if both antenna and
ground losses aren't minimized.
When the feed impedance is low, the losses of the matching network play an
important role.
73,
Mauri I4JMY
>
> I am of the opinion that there is not as much
> difference between different verticals as is often
> thought.
> Antenna (2) is only 3 or 4 dB better than antenna (1).
>
> 73 Roger
> VE3ZI
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