alftel
Member level 1
We have design which includes LNA as an input point, and there is a possibility of impedance mismatch on both sides (RF input and load). One of the accepted techniques for impedance matching is to implement 50 Ohm attenuation.
1) Is it ok to implement 50 Ohm 0dB attenuator before input DC isolation capacitor and after bias tee DC isolation capacitor?
2) Should these attenuators be guarded by another DC isolation capacitors on opposite sides (i.e. guarded by DC isolation capacitors on both sides)?
I was thinking to use this part from Susumu - PAT120TR-ND part from Digikey - Susumu 0dB Attenuator
Any suggestions/recommendations/previous experience with such approach?
1) Is it ok to implement 50 Ohm 0dB attenuator before input DC isolation capacitor and after bias tee DC isolation capacitor?
2) Should these attenuators be guarded by another DC isolation capacitors on opposite sides (i.e. guarded by DC isolation capacitors on both sides)?
I was thinking to use this part from Susumu - PAT120TR-ND part from Digikey - Susumu 0dB Attenuator
Any suggestions/recommendations/previous experience with such approach?