Designing a 13.56MHz 10W Continuous Wave Signal Source for 50 Ohm Load Testing

Hello all I'm needing help with a project I was assigned and here it is:

Design a engineered continuous wave signal source at the ISM frequency of 13.56Mhz. This will be for a closed (non-signal radiating) application. Power level of at least 10 watts into a 50 ohm non reactive load , an appropriate RF WATTMETER and dummy load for testing the power level should be used.

I not sure how to approach this project, meaning like designing it, components, what type of power source to use, etc.
Would greatly appreciate comments

There is a lot of information on the web on this type of application. Kits are available, for example, for the 1-30 MHz range, often using RF power FETs in a push pull class AB configurations using wide band transformers. Ham radio applications come to mind, have a look at the ARRL and RSGB books. Look at companies producing high power RF Fets, you will find application notes and possibly application assistance as well,
Simpler designs use class D or E amplifiers, this is the most likely configuration for your application, so check that out on the web and in the books mentioned above.
If you only have a low power RF signal generator as a test source, a pre-amplifier will be needed to cope with driving the power FET to meet the gate voltage requirements, as well as the gate capacitance. If the system is non-radiating, then spectral purity will not be of so much concern, some configurations may have high harmonic content,
Cheers,
Richard