Question
Matching impedance between WB55 and MLPF-WB-01D3
I'm having a bit of an issue understanding what's going on with the impedance matching between the WB55-48QFN and the MLPF-WB-01D3 (made specifically for the WBxx family).
Per another post in the community, and the WB55 documentation, I now know that the RF1 output pin has a characteristic impedance of 42+J19. That's clear now. However, when reading the datasheet for the MLPF-WB-01D3 LPF with a matching network, it specifies a matching impedance between the WB and the filter of 67 Ohm.
So I am a bit of a loss now, I have my layout set for 42 impedance between the two components, but now I'm questioning my decision.
Anybody out there have experience with these two parts? What is the recommendation for impedance in that transmission line?
