Hello:
I´m Jesús, I´m from Spain, and I´m designing a small UAV for my university. But, know I have a big problem

I need a video or video/data tramisition system that fulfill the following requirements:
1- Low weight (less than 300gr if only transmit video, or 500gr if it can transmit video (like a video transmiter) and data (like a radiomodem) at the same time.
2- Operate at 14 volt maximum
3- S-Band, L-Band, ... whatever (best L_Band)
4- We need a range of 10km with omni-directional antenna.
5- Compatible with procerus UAV kestrel autopilot.
Thanks For your help.
Jesús