How to make stable RF Power Amplifier output

Thread Starter

Mike2526

Joined Nov 10, 2020
110
The heating in the coil will be due the the current, both DC and AC.
Consider that we do not know the diameter of the conductor in the coil, not the resistance, nor the current in the coil, it is not likely that we could make even a poor guess about how much heating there might be. We have one equation and quite a few unknowns.
Agreed.
 

Ya’akov

Joined Jan 27, 2019
10,258
Welcome to AAC.

Unfortunately, no one caught that your post is about coursework up to this point. The AAC rules limit the sort of help members may provide to guidance and not novel answers.

Your post has been moved to the Homework Help forum. In the future, please make sure to post any questions related to things for which you will receive academic credit to this forum (Homework Help) to ensure that members are aware of the limitations placed on their responces.
 

Thread Starter

Mike2526

Joined Nov 10, 2020
110
Hello everyone, I hope you’re doing well. I’ve been working on modifying the attached RF Power Amplifier circuit based on your helpful suggestions, and I’ve made good progress. However, I’m now facing a small issue – I’m currently getting an output voltage of around 9Vpp, but I need it to be in the range of 15–18Vpp. I’ve tried changing the values of resistors R6, R7, and R8, but I haven’t been able to reach the desired voltage level. I would really appreciate any advice on how I can boost the output voltage to the desired level. Thanks in advance for your help.
 

Attachments

MisterBill2

Joined Jan 23, 2018
27,651
The two resistors across the output, at the start of the matching/filter network, might be the problem.It is not clear that they are needed for any circuit function. And given that the values are only two digits, they are quite probably the cause of the problem.
 
Last edited:

Thread Starter

Mike2526

Joined Nov 10, 2020
110
The two resistors across the output, at the start of the matching/filter network, might be the problem.It is not clear that they are needed for any circuit function.
Just to make an RC network to couple output signal of MOSFET to the input of matching network. I have changed the value of these resisters too, but varication starts in the magnitude. But if you will suggest me any suitable combination then i will be grateful to you for this act of kindness.
 
Top