pk2010
Newbie level 4
I have to make a simple GPS Receiver board. So i have a Passive Patch->T Matching Network(Values not decided, antenna manufacturer will give me the values once they have my PCB) ->9.2nH(as specified in LNA datasheet) -> LNA -> SAW Filter -> GPSIC
Patch antenna manufacturer has given me a T-matching type of circuit which i have to place just after patch. Where as LNA datasheet says that a 9.2nH inductor is needed at input. LNA manufacturer datasheet says that before 9.2nH it can be a 50ohm input line.
So my confusions are
1. Is my attached circuit diagram correct?
2. How is the matching process going to happen? Is it like designer's task is to match the impedance 50ohm upto after T network(before the 9.2nH) and expect that 50ohm input->9.2nH->LNA path is already optimum?
Patch antenna manufacturer has given me a T-matching type of circuit which i have to place just after patch. Where as LNA datasheet says that a 9.2nH inductor is needed at input. LNA manufacturer datasheet says that before 9.2nH it can be a 50ohm input line.
So my confusions are
1. Is my attached circuit diagram correct?
2. How is the matching process going to happen? Is it like designer's task is to match the impedance 50ohm upto after T network(before the 9.2nH) and expect that 50ohm input->9.2nH->LNA path is already optimum?