How can I use a Power over Ethernet cable to connect to a hub and use PoE and non PoE devices?

I have one Ethernet cable running to a WiFi antenna. The antenna is powered by the Ethernet cable, using PoE. I want to be able to plug the current cable into a hub or switch, so I can connect other devices (non PoE) like an Xbox 360 or PC, but I also need to maintain the PoE to the antenna. Taking the antenna off PoE is not an option. What kind of device can I use to split this PoE line into PoE and non PoE cables?