45 GHz fT — gain headroom into C-band
The BFP520FE6327 is an Infineon NPN silicon RF transistor with a 45 GHz transition frequency, delivering 22.5 dB of gain and a noise figure of 0.95 dB at 1.8 GHz. It is housed in a 4-TSFP package for surface-mount assembly.
Noise figure and gain — LNA stage fit
With a 0.95 dB noise figure at 1.8 GHz, this transistor suits the first LNA stage in GPS, cellular, and ISM-band receivers where the noise floor sets the system sensitivity. The 22.5 dB gain means a single stage can lift a -100 dBm signal to a detectable level without a second gain block. Collector current is rated to 40 mA maximum, and the 3.5 V Vce breakdown limits the supply rail — typical for battery-powered and low-voltage RF front-ends. The 100 mW power dissipation ceiling is adequate for small-signal stages but rules out driver or output amplifier roles.