LNA PCB layout
LNA PCB layout
(OP)
Hi,
I design LNA´s for the automotive market. I have a dimension constraint. Does anyone know if it´s possible to design a LNA (174-864MHz) on one side of the PCB and a FM LNA on the other one?? I thought than using 4 layer PCB with two internal ground planes could be an option, however I have never done it before and I don´t know if what I´m saying is just not possible. My worries are if amplifiers will affect each other.
Thanks in advance.
I design LNA´s for the automotive market. I have a dimension constraint. Does anyone know if it´s possible to design a LNA (174-864MHz) on one side of the PCB and a FM LNA on the other one?? I thought than using 4 layer PCB with two internal ground planes could be an option, however I have never done it before and I don´t know if what I´m saying is just not possible. My worries are if amplifiers will affect each other.
Thanks in advance.





RE: LNA PCB layout
I've designed several 2.4 GHz LNAs on double sided material keeping one side ground plane. Layout's a little tricker but you can do it. Nothing inherently wrong with having two ground planes. Any ground stitching vias may have to be thought-out carefully since blind vias would be cost prohibitive for automotive.
A wild thought - you could make the two LNAs on double sided thin material, and as a final PCB assembly step break and fold the two PCB back-to-back with a drop of glue, RTV, or doublesided tape to create your "4-layer" board assembly.