yeocker
Newbie level 1
Hi all, I am looking for some answers on getting my current GPS to work on my setup below with an external LNA.
The module that I am using (Quectel BG-95) has an internal LNA, nonetheless I have connected an external LNA in series in hope of improving the gain further. The spec sheets of this module specifies that gain of the external LNA should be < 17dB to prevent signal saturation and I have picked an LNA with gain less than 17dB. However I wasn't able to get GPS to work with this LNA.
I researched and saw that some design placed the 100pF DC blocking capacity after the LNA right before the ANT_GNSS input on the module. I wonder if this would fix my issue here.
By the way, I have tried bypass the LNA and was able to get GPS fix on the module as long as I have clear skies but when the GPS signal gets weaker, the GPS fix is less reliable, hence would really like to try having an external LNA to see if I can get reliable GPS fix when the signal is weaker.
Appreciate any help offered here. I am pretty much out of ideas now!
The module that I am using (Quectel BG-95) has an internal LNA, nonetheless I have connected an external LNA in series in hope of improving the gain further. The spec sheets of this module specifies that gain of the external LNA should be < 17dB to prevent signal saturation and I have picked an LNA with gain less than 17dB. However I wasn't able to get GPS to work with this LNA.
I researched and saw that some design placed the 100pF DC blocking capacity after the LNA right before the ANT_GNSS input on the module. I wonder if this would fix my issue here.
By the way, I have tried bypass the LNA and was able to get GPS fix on the module as long as I have clear skies but when the GPS signal gets weaker, the GPS fix is less reliable, hence would really like to try having an external LNA to see if I can get reliable GPS fix when the signal is weaker.
Appreciate any help offered here. I am pretty much out of ideas now!