I'm using a RFM69HCW module (https://www.sparkfun.com/rfm69hcw-wireless-transceiver-915mhz.html (https://www.sparkfun.com/rfm69hcw-wireless-transceiver-915mhz.html)) to transmit data at ~60 Kbps to the wheel hubs of a large vehicle. I'd like to use an off-the-shelf outdoor antenna like this one (https://www.amazon.com/Network-AOA-915-5ACM-Outdoor-802-11ah-Application/dp/B08H8J6ZV6/ (https://www.amazon.com/Network-AOA-915-5ACM-Outdoor-802-11ah-Application/dp/B08H8J6ZV6/))
on each wheel and the body. Any better suggestions?
I'm concerned that a single body-mounted antenna won't have good enough line-of-sight to all four wheels, so I'm considering an antenna on each side of the vehicle. Is there a way I can use two antenna with a single transmitter? If I need to use a separate transmitter for each antenna, how much frequency separation do I need to avoid. interference?
Thank you!
A single antenna will be just fine. Any antenna for that matter. The range is negligible.
There's a lot of metal and with a single antenna, no direct line of sight to all four wheels. Will reflected signals work well enough? I'll be able to test in a couple of weeks, but I'm thinking about options in case it doesn't go well.
It should be just fine. I'd be surprised if 3 wheels receivers work well and 1 doesn't at all.