Hopper System Support Forum
The Hopper remote antenna uses an M10 connector. There are M10 extension kits but I haven't found anything that converts the standard F-connector to M10 yet. The UHF 2G uses 2.4GHz ZigBee technology. So the ideal antenna length would be 1.23 inches, 2.46 inches, 3.07 inches or 4.92 inches...