This RF amplifier for FM 88-108 MHz with no tune (broadband) needed to cover all the FM Band. This RF Power amplifier is equiped with the famous Mosfet transistor the BLF245.
Depending on the output power level you are able to provide with your FM synthesizer, you can use or not the 2N3866 driver stage included in this amplifier design.
All the impedance networks (Input-Output) of this RF amplifier have been determined by using the softwares: Mimp.EXE and Genesy.
Low pass filter measurements file(PDF)
This RF Amplifier need a 9 elements low pass filter ensures that its harmonic frequency meet at least a 60 dB rejection from the carrier.(RF Simulation with RFSIM99)
Gain and Ros measurements file(PDF)
The RF FM amplifier has a 27 dB gain (with driver stage) and provides 25W with a 58% efficiency.
RF Power Amplifier PCB Layout
Source: 25W MOSFET FM AMPLIFIER
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