Low Noise Amplifier For Gps Applications Using Bfp640 Sige Transistor

BFP640 used for 1575 MHz Global Positioning Satellite (GPS) Applications • BFP640 is investigated for use as an LNA for 1575 MHz GPs • Design Goals: Gain = 16 dB min, Noise Figure < 0.6 dB, Input / Output Return Loss 10 dB or better, current < 10 mA from a 3.0 Volt power supply, Input P1dB > -14.8 dBm min • Printed Circuit Board used is Infineon Part Number 640-061603 Rev A. Standard FR4 material is used in a three-layer PCB. Please refer to cross-sectional diagram. • Low-cost, standard "0402" case-size SMT passive components are used throughout. Please refer to schematic and Bill Of Material. The LNA is unconditionally stable from 5 MHz to 6 GHz. • Total PCB area used for the single LNA stage is approximately 35 mm². Total Parts count, including the BFP640 Transistor is 12. • Achieved ≅ 17 dB gain, 0.92 dB Noise Figure at 1575 MHz from 3.0 V supply drawing 8.3 mA. Note noise figure result does NOT "back out" FR4 PCB losses - if the PCB loss at LNA input were extracted, Noise Figure result would be approximately 0.2 dB lower. Amplifier is unconditionally stable from 5 MHz to 6 GHz. Input P1dB ≈ -13.1 dBm @ 1575.4 MHz. Outstanding Input Third Order Intercept of +7.7 dBm.
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Low Noise Amplifier For Gps Applications Using Bfp640 Sige Transistor application circuits
Low Noise Amplifier For Gps Applications Using 
Bfp640 Sige Transistor application circuits



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