Televes DAT75 Digital Wideband Tv Aerial
The DAT45 aerial has a gain of around 16.5dB
which if you consider that an increase of 3dB represents a
Doubling of signal is quite high.
A "standard" TV aerial has a gain of about 12dB
so the DAT45 could be considered to be around 200% better.
The DAT75 has a gain of 19dB which is "only" 2.5dB higher than the DAT45 (in fact about 65% more gain!)