Using Dual Band 900 MHz/2.4 GHz Controller

Blue Robotics Vehicles BlueBoat
1

I noticed in the world of RC Controllers, the use of Dual Band Controllers using 900 MHz/2.4 GHz frequencies. A particular one liked by the RC community is a FrSky Tandem X20S that has lots of potential but costs nearly $500. This controller may indeed be overkill but the use of 900 MHz has got me wondering.

https://www.amazon.com/FrSky-Tandem-Transmitter-Dual-Band-Internal/dp/B0986TZH25?ref_=ast_sto_dp&th=1

To find an RC controller having long range control (1-6 miles) of the BlueBoat (or other UAV) is nearly impossible. Too bad we can’t find a controller like DJIs RC2 that is used to fly their Air3 drone. It uses their secret OcuSync 4.0 dual band system (not 900 MHz) capable of flying up to 20 KM. Of course that is line-of-sight and the drone is obviously up in the air, and a UAV is on the water. I get that! But surely the transmission signals can be improved with certain microprocessors and better antennas using the dual band frequencies.

I am curious to know who is using these dual band frequencies 900MHz/2.4 GHz with their BlueBoat or other UAV.

2

I also saw this Long Range 900 MHz OEM RF Module | Digi XBee-PRO 900HP | Digi International

Claims up to 28 miles! Really?? If so, my problem solved.

3

So maybe I buy and try the following 900 MHz system…

XM-M92-UP-UA - Digi XBee modem, USB to Digi XBee-PRO 900HP, 200 Kbps with accessories | Digi International ($220 from DigiKey
A09-Y11NF - Antenna - 900 MHz, yagi, 11.1 dBi, N-female. | Digi International ($155 from DigiKey)