Ka-band is the newest satellite broadcast band. Ranging from 27 GHz to 40 GHz. Ka-band is used by Wildblue and DIRECTV. Wildblue uses Ka-band for delivering of satellite broadband and DIRECTV uses Ka-band to supplement their existing Ku band channel capacity.
DIRECTV plans to use two sections of Ka bandwidth. 18.3 - 18.8 GHZ and another 500 MHz band at 19.7 to 20.2.
Wildblue uses 19.7 to 20.2 GHz for the signal sent to the Wildblue customers dish (User Downlink) and 29.5 to 30.0 GHz for sending signal out to the satellite from the users dish (Users Uplink). Go here for more information on Wildblue Satellite Internet frequency allocations.