Voltage Controlled Oscillator Design ~300MHz 10V Pk-Pk

[Lyuben]

First a disclaimer, I am not an RF engineer - yet, and my experience is still limited. I am trying to design an oscillator that I can use to apply 10V Pk-Pk voltage-sinewave across a PIN diode in reverse-bias (10V Pk-Pk centered around -5V DC). The frequency of interest is 290MHz, although that due to some uncertainties in my circuit it can be slightly more or slightly less. Therefore, I would like to be able to adjust my oscillator between say 280MHz-300MHz to compensate for the uncertainties.

Additionally, it's quite important for my application that the frequency remains stable. I am still figuring out how stable I need it exactly to be but for now I am assuming +/- 0.1MHz from the central frequency (290MHz) should suffice. Furthermore, my PIN diode doesn't have the same impedance at 300MHz, as it does at 280MHz. I'm currently thinking of first designing the oscillator for 50Ohm and then moving on to design some tunable impedance-matching network to put in-between. However, I am curious if this can be implemented in the oscillator design in some smart way.

For now, the circuits that I am looking at are a Colpitt's oscillator, and a PLL circuit. However, achieving 10V Pk-Pk seems troublesome. Any ideas, recommendations, or piece-of-advise is more than welcome!

[Benta]

I'd probably just use a small-signal VCO and amplify the output signal appropriately.
Like a MC100EL1648.

[moffy]

A small RF transformer might help: https://www.minicircuits.com/pdfs/TC16-1T+.pdf

[Etesla]

Are you making a thing that you can tweak by hand in one off quantities, or would this design be for mass production? And over what conditions (duration and temperature) do you want it's frequency to be 290 MHz +- 0.1MHz?

[SCSKITS]

So you need +24dBm into 50 ohms if that is the impedance you are driving. For a "one of" experiment, I would use an RF signal generator and an amplifier to get the required levels, with the output coupled by a transformer with a capacitor in series with the output to isolate from the DC voltage. If your impedance is higher than 50 ohms, then the transformer can be used to directly step up the signal generator output. If a matching network is needed it can be after the transformer.