In trying to get maximum usability from an Analoge Devices radar module (eg EV-Radar-MMIC2 evaluation board) so i was wondering if the receivers in these boards would be sensitive enough to detect the radiometric emission from the environment. If so there may be an interesting mode of operation, where you make some radar measurements, then measure the radiometric or passive emission. - ie a kind of dual mode of operation.
However to make a radiometric emission the RF and/or IF gain of the system would need to be considerably higher than that in the radar measurement and you would also need to turn the radar transmitter off. So can the receiver part of the module be configured to measure radiometric emssion?
I am not familiar with radiometric emissions signal levels. Perhaps this would be possible with some sort of LNA at the Rx inputs. This is not something we have looked at, but since the EV-RADAR-MMIC2…
I am not familiar with radiometric emissions signal levels. Perhaps this would be possible with some sort of LNA at the Rx inputs. This is not something we have looked at, but since the EV-RADAR-MMIC2 board is connectortised I guess it might be possible. I would recommended analysing the ADF5904's datasheet to see if it can come close to your requirements before proceeding with the evaluation kit.
The Tx can be powered off as necessary with a single write to R0 of the ADF5901, and powered on again with another write to R0.