FM transmitter using colpit oscilator

Hi everyone, i have chosen to make an fm transmitter as my semester project. but after several days of research, I couldn't get many answers.
I know:
1. signal received would be maximum of 150 mV, and I need to amplify its current and voltage.
but how?(i.e through common emitter or common collector?).

2. I need to generate 90 MHz frequency, and modulate the input sound signal with generated 90 MHz signal.
but how will it modulate and how should I design it? because the attached pic doesn't satisfies theoretically.

So i shall be really great full if you could provide me with links how to design it. Or at least tell my if you know anything about it.

I shall be really grateful for quick response because I have to submit it's working simulation by Monday.

Where is Audioguru when we need him???

so Mr. Audioguru can you help me out in my problem?

You would modulate the 90 MHZ with the audio. Not the other way round. You could use a pair of varicap diodes. one connected to each end of the coil via a small capacitor with the modulating signal fed to the diodes via a reasonably high value resistor. the other end of the varicaps would be connected to ground. You would also need to provide a DC bias to the varicaps to get them to a linear part of their characteristics. There may be a problem with this method as you are running the oscillator at fairly high power. Having a low power oscillator followed by an amplifier may be a better solution. Also a different configuration of the oscillator may make the use of varicaps easier. Google "varicap diode circuits colpitts"

Les.

Sorry i didn't mentioned earlier, we are bound to use only:
Transistors, FET's, simple and zener diodes, inductors and capacitors.

Sorry, we can't use varactor diodes.
And thanks for this much long explaination.

I can't remember how other school kids designed an FM transmitter 50 years ago, I used a tunnel diode oscillator in mine.
Google shows hundreds of Colpitts oscillators in Google Images using the capacitance of the oscillator transistor as a varactor diode.
The audio signal modulates the transistor which causes its capacitance to change producing FM. Since the transistor is modulated then it also produces some AM. The simple FM transmitter is like this:

I had learned almost everything basic from the historical thread: https://www.electro-tech-online.com/threads/another-fm-transmitter-project.117981/