I am using SIM808 in my design and I am using a active GPS antenna.
I feed the antenna via a 10 Ohms resistor and a 27 nH inductance, just as described in the Datasheet (HW reference, page 55, Figure 49).
Although this was working well with one device (consuming about 30 mA with the Antenna attached), I have another device exactly buildup alike and it consumes 500 mA and they are directly going into SIM808 (I disconnected everything else, so this has to be the sink).
Why is that? Am I missing something?
Thanks in advance.