Originally posted by Rooster
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As you mentioned rightly, better antenna picks up more noise as well. But it is not only noise, it also picks up same signal twice, a direct one and another reflected & weak one (Ghosting). Same is the case with amplifier. It amplifies the noise and the ghost signal as well. So both the good antenna & amplifier are double-edged sword.

However the amplifier has one disadvantage compared to a good antenna: In addition to amplifying the external noise picked up by antenna, the amplifier itself generates noise (3 dB to 7 dB for normal satellite amplifiers), while antenna does not generate any noise, it only picks up external noise. Here a good antenna wins over an amplifier.
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