This application note describes a low noise amplifier at 1.9GHz using SIEMENS SIEGETâ25 BFP405. The design emphasis has been on achieving high output intercept point. A circuit description, schematic, pcb layout and components list are shown below together with measured performance data. Data at 1.9 GHz (3V and 8.5mA): Gain=19.5 dB / IP3out=15dBm / NF=2.3dB / RLin-out >15dB