when you say passive ranging, are you listening with a third device that knows the protocol or ensuring that the info you need is available on each node and not needing access to the phy, therefore the "loose coupling"?
Are you taking into account the turn around time from receive to transmit ? There must be a delay time ! I'm not sure I see the point of this. It looks like radar, but the distant object is an active device, not a passive device. Today, cheap Lora devices with built-in GPS do everything that is required. The antenna you were using is a log periodic antenna, and it looks like you are using it back to front. I can't tell for sure from your photos.
FYI: That's a log periodic antenna, wide bandwidth (900-2800MHz by WA5VJB) @ 11:33, not a yagi. ;)
"loosely coupled ranging" .. I like it
when you say passive ranging, are you listening with a third device that knows the protocol or ensuring that the info you need is available on each node and not needing access to the phy, therefore the "loose coupling"?
Are you taking into account the turn around time from receive to transmit ? There must be a delay time !
I'm not sure I see the point of this.
It looks like radar, but the distant object is an active device, not a passive device.
Today, cheap Lora devices with built-in GPS do everything that is required. The antenna you were using is a log periodic antenna, and it looks like you are using it back to front. I can't tell for sure from your photos.