This is a 2.4G 10db directional antenna which could be used on the table.

Increase your wireless coverage by up to 400%
2.4GHz high Gain WIFI antenna increases your wireless network strength from a standard 2dBi to 10dBi. A large problem with many wireless networks is poor wireless coverage. The product is an easy to install solution that plugs directly into your wireless device via the antenna port. New advanced WIFI Dish antenna technology gathers and directs the wireless signal towards the wireless source. As a result, the product improves the distance and connection quality of your WiFi by up to 400%. Installation is quick and easy. Simply replace antenna on your wireless device, adjust the orientation towards your wireless access point the product has a built-in SMA connector.