This application note describes a low noise amplifier at 1.9GHz using Siemens SIEGETâ25 BFP405. The design emphasis has been on achieving a low noise figure. A circuit description, schematic, pcb layout and components list are shown below together with measured performance data. Data at 1.9 GHz (3V and 4.8mA): Gain=16 dB / IP3out=8dBm / NF=1.6dB / RLin-out >10dB