search

will127534 / LoRa-concentrator

A simple Board for SX1301 and SX125X LoRa Gateway / Concentrator
MIT License
337 stars 123 forks source link

Combining RX paths #17

Closed amateusz closed 6 years ago

amateusz commented 6 years ago

I'm not a RF design expert, but shouldn't RF RX paths (N$49 at your schematic for v3) be merged using some impedance matching ? Integrated resistor divider (losses >= 6dB) or Wilkinson divider (losses >= 3dB). They cost pennies (~$0.3).

will127534 commented 6 years ago

There is two inductor L1 and L2 and two Cap C22 with C20 for impedance matching. So it is basically doing what resistive splitter is doing.