alt Hacker NewsI didn't know about the chip having separate TX and RX pins. There must be a gap in the market for rooftop-to-rooftop LoRa transceivers that don't cost a fortune. Even using something like a 24 dB gain antenna would push range up by a factor of 10 relative to a simple 4 dB antenna, or get a substantial improvement in bandwidth/reliability at the same range. For an even simpler design, you could just put a 20 dB attenuator between the transmit port and the antenna, reducing the effective forward gain of 4 dB, while getting the full 24 dB in the opposite direction. Proper RF engineering details an exercise for the student etc.
Y'know it occurs to me: If you want separate east and west paths, the chips are so cheap, it might make more sense to just use two whole off-the-shelf boards with some software linking them together, one dedicated to Tx and the other dedicated to Rx. Same hardware, just only use half of it.