I just received my LimeSDR + antennas. I have a few questions that may be stupid but I am an SDR noob so…
All the antennas appear identical. Same size, no markings. How do I know which is which? The crowdsupply page says they cover different frequency ranges. Is that wrong?
If I don’t plug an antenna in is there any risk of damaging the board? I assume not for reception, but if I accidentally try to transmit without an antenna will it die?
Ah thanks that is helpful. So based on that return loss graph (which really seems to be a reflection coefficient graph) they’re fairly broadband from 900-1700 MHz and 2000-2400 MHz. Outside those ranges it has a reflection coefficient of -10 dB (i.e. 90% reflected, despite what that data sheet says). I have no experience but that seems not great.
Anyway, what about the other questions? If I transmit with no antenna will it damage the board? What’s the difference between TX1_1 and TX1_2?
I don’t think the output power of the LimeSDR would damage the board but I’m not an RF engineer. Perhaps someone with more knowledge would be able to answer this.