Omnitik U-5HnD (AP) + Groove 5Hn (CPE) distance

Hi, Guys?

We are trying video transmission with the combination above from RC chopper flying with Groove 5Hn(CPE).
We are using 9dBi omni directional antenna and it reach only app 200 meters.
Could any guys recommand the suitable antenna on Groove to reach app 1Km to the Omnitik on ground.
And is there any best configuration on Omnitik and Groove in setting or physical combination with certain antenna?

Please help us and advice, guys.

Thank you.

Sellapia.