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508/5000
I am trying to design a preamplifier for the VHF band of 88-108 MHz. I have made an impedance adaptation using 3 elements taking as central frequency 100 Mhz and a bandwidth of 25 MHz Q = 100MHz / 25MHz = 4. I would like to know how I can improve this design, I think it is amplifying very little. I do not know if I have done badly the impedance adaptation matching in the smith chart or if I am ignoring something in this amplifier design. Is there a way to increase the power output? In this design.

These parameters I have taken from the data sheet. (https://www.onsemi.com/pub/Collateral/P2N2222A-D.PDF)

And these are the admittance parameters that I've got. These formulas I have taken from this book "Estado solido en ingeniera de Radiocomunicacion, Herbert L. Krauss" (pag 125).

And this is the final result I have to design the impedance matching network. The equations taken from "RF Circuit Design 2nd Edition, Chris Bowick" (pag 130-131)

508/5000
I am trying to design a preamplifier for the VHF band of 88-108 MHz. I have made an impedance adaptation using 3 elements taking as central frequency 100 Mhz and a bandwidth of 25 MHz Q = 100MHz / 25MHz = 4. I would like to know how I can improve this design, I think it is amplifying very little. I do not know if I have done badly the impedance adaptation matching in the smith chart or if I am ignoring something in this amplifier design. Is there a way to increase the power output? In this design.

These parameters I have taken from the data sheet. (https://www.onsemi.com/pub/Collateral/P2N2222A-D.PDF)

And these are the admittance parameters that I've got. These formulas I have taken from this book "Estado solido en ingeniera de Radiocomunicacion, Herbert L. Krauss" (pag 125).

And this is the final result I have to design the impedance matching network. The equations taken from "RF Circuit Design 2nd Edition, Chris Bowick" (pag 130-131)

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