RFD900X Antennas?

Greetings i just have a quick question regarding the RFD900x LR radio modems. Wich one is the air antennas? I’m guessing that the smaller ones are…

1 Like

And i’d also like any setup guides, if possible!

thanks guys!

1 Like

I use the larger one on both sides. I got 4 of them in the kit. You´ll get better range with those.

Check out the documentation: RFD900 Radio Modem — Copter documentation

1 Like

http://files.rfdesign.com.au/

Also I’ve seen over 20km with the short antennas on the aircraft, and they will probably do more, just the long antennas on the ground unit.

1 Like

The short ones require a ground plane. If you can provide a ground plane on your aircraft they are light and they work very well. If you cannot provide a ground plane, then use the long ones.

I’m sorry craig, but what do you mean by ground plane?

https://www.electronics-notes.com/articles/antennas-propagation/grounding-earthing/antenna-ground-plane-theory-design.php

1 Like