I have a problem with the GPS amplifier according to my own design, it does not work. There is no signal at the output.

L4 is the impedance matching of the antenna to 50 Ohm by autotune in SimSmith. It is strange that the current consumption is 2.8mA for a single-stage amplifier (Infineon Evaluation Board BGA524N6BOARDTOBO1) and only 3.6mA for my double-stage amplifier.

What could be wrong?

 

What connections do you have to the circuit when you are operating it?

 

I connect SONY Li-Ion 4.2V battery to "+" and "-" port and connect two middle ports "3.3V" and "PON" togather. I measured the 3.3V on the pin by Voltmeter. The LNA ouput is connected to SparkFun GPS Breakout - ZOE-M8Q (Qwiic) and signal is monitored in u-Center sofware.

When I connect to ZOE-M8Q just the dipole wire antenna without the LNA:

 

What is the purpose of L3?

Are these parts hand soldered? Some of the connections do not look very clean.

 

L3 is suggested output impedance matching of the B2611 Infineon SAW Filter. All parts has been reflow soldered by a professional company.

I will try to measure the amplifier gain characteristic by NanoVNA, waiting for SMA 20db and 40db attenuators.

 

In my case even one stage amplifier doesn't work either. It only attenuate signal for 30 dB. Insane. Do you have some measurements?

 

Just a suggestion from a different perspective... Are the CAD models of the chips correct? And are the chips mounted in the right orientation?

Edit:
Oh... Didn't see that this message was already more than half a year old...