Hello,
does anyone tried terminated vs unterminated RF switch in AoA / AoD application? According to forum, some people use terminated switch, some don't.
Also, there should not be any DC level, but someone form nordic recommended to use DC blocking cap:
My problem is that i'm getting wide spread of phase shift from the same place, so im looking for the origin of that issue.
Thank you,
Hynek Stetina
Yes, i see phase shift in static enviroment. Even in the middle of the garden, where there should be not much reflections.
Here is how the IQ data look like:
Here is the gif from data processing. Im able to compensate all data and don't see there any reflected signal.
https://gfycat.com/jealousremarkabledaddylonglegs
Legend from bottom:
-I,Q, I*Q from reference period
-phase from measuring slots
- after freq compensation
- median between antena switching (ant1 vs ant2 vs ant1....)
- arrow with phase sift from the center of measuring slot (3 samples: center sample+-1)
Our current RF switch in unterminated BGS13SN8E6327 without blocking caps.
Yes, i see phase shift in static enviroment. Even in the middle of the garden, where there should be not much reflections.
Here is how the IQ data look like:
Here is the gif from data processing. Im able to compensate all data and don't see there any reflected signal.
https://gfycat.com/jealousremarkabledaddylonglegs
Legend from bottom:
-I,Q, I*Q from reference period
-phase from measuring slots
- after freq compensation
- median between antena switching (ant1 vs ant2 vs ant1....)
- arrow with phase sift from the center of measuring slot (3 samples: center sample+-1)
Our current RF switch in unterminated BGS13SN8E6327 without blocking caps.
