QuickerTek today announced its new tri-band antenna delivers improved wireless performance for AppleTV that the company says boosts signal strength up to 50%. For only US$129.95 and a few minutes with a screwdriver, the AppleTV Antenna Upgrade can easily deliver improved performance. It is a small trio of antennas that not only improve range and signal strength, but also cut the wireless interference that plagues some AppleTV home users.