So we occasionally we try to go a bit away from our office and see if a different antenna produces better results. Personally, I never have good luck with antennas. First of all, the knobs on various cards (including the one we ship with SILICA) come off if you pull too hard on the antenna, and that ruins the card.

But if you take a butter knife and carefully lever the old antenna off, you can put a new one on, which we did.

Result: The exact same signal strength as the original antennas we ship with SILICA. This makes me sad on one hand, and happy on the other. There's a balance to be kept between "Great Antenna" and "Antenna that makes me look super fishy everywhere I use it". So far, the ones you get with the card are the best of both worlds...