900MHz RF Amplifier based BFG480W

Circuit Diagram:

This is the circuit diagram of 900MHz RF amplifier built based transistor BFG480W manufactured by Philips. The circuit features low noise, good linearity performance and works well for high frequency application.


This is the initial conditions apply for the amplifier design:

• Vsupply » 3.6 V
• VCE » 2 V
• IC » 20 mA
• f = 900 MHz.

The circuit is designed to show the following performance:

• |s21|² » 15 dB
• VSWRIN < 2
• VSWROUT < 2
• NF </= 2 dB
• IP3_i > 9 dBm.

The input and output matching is realised with an LC-combination. Also extra emitter inductance (micro stripline) is used
on both emitter-leads to improve the matching and the noise figure.


Components List:

PCB Layout:

Download the explanation about this 900MHz RF Amplifier circuit based BFG480W in PDF file:
» Download Link