This application note provides general information, print layout and list of used components, circuit layout and measured data of a low noise amplifier at 1.9GHz using Siemens SIEGET BFP450. The emphasis has been on high IP3invalues. Data at 1.9 GHz (3V and 24mA/R1=33,R2=5.6k) Gain=11 dB/IP3in=14dBm/NF=1.9dB / Rlin-out >10dB Data at 1.9 GHz (3V and 15mA/ R1=56,R2=8.2k) Gain=10.5 dB/IP3in=10dBm / NF=1.8dB/RLin-out >10dB