Questions tagged [sub-ghz]

I want to buy a sub-gigahertz radio module which has a TX power of 16 dBm. With the inverse square law, I can see that it has a power of -90 dBm at 50 km. I don't know if this is the correct way to determine power at a certain range or not, but…

I am making a simple lora transciever and absolutely want to fit it on a single side dual layer 0.8mm thick pcb. Which makes impedance matching a bit tricky with 53mil traces... Here the form factor of the final case it will be in forces me to place…

I need to verify (and possibly re-match) the impedance of the saw filter (in photo) to 50ohm. I have not ever matched a filter before (but have matched antennas) and am looking for advice on what procedure to use..