We have followed the pcb design guidelines and we see output signal. Nevertheless we have a two ANT design; one implemented with M20047-1 and another with coax receptor for an external ANT.
We observe following behaviour.
- When a external ANT is connected and then disconnected we have signal from the active antenna but with intermittencies.
- From cold boot, we never observed signal from the active ANT when we boot without external ANT.
We used your exact logical design with the two external components (L=8,2μH and R=0) but in order to get signal the L was shortcircuited as well.
Any ideas on how to improve performance?