DVB-t is not is allowed to transmit in 2.4 GHz and it does not exist any single chip transceiver solutions for DVB.
**broken link removed** is the most flexible, almost single chip, RX receiver I know about.
**broken link removed** is a very common single chip receiver that can be found in USB dongles and similar simpler DVB-t receivers.
DVB-t TX is a very complex thing that requires I/Q modulation with low phase error. No single chip solution for streamer/coding/modulator exist as far as I know.
This is a simple modulator.
Output from a Teamcast box comes two modulated signals, I & Q, with a carrier decided by which type of data-stream you have selected, so you need to add a I/Q capable up-converter of your choice before any PA. As PA must be very phase linear do I not think a single transistor solution is the best type of PA.
The Teamcast box must be feed with something able to deliver a digital TS at correct bitrate. Most simple is to use a simple data buffer that can pick data from a TS-file.
Another possibility is to check at
www.dvb.org as I have heard planes about a standard for micro DVB-s2/h repeaters, in size of a shoebox. Not a single chip solution but at least a single box. If you must use 2.4 GHz do I think it exist a Chinese digital TV standard in 2.6-2.7 GHz or something like that and very similar protocol as DVB-h. It is not so fare away in frequency, but doubt they have any single chip transceivers.