Anything and everything digital generates RF energy, sometimes at high levels.? Sweep your PC or laptop.? Yes, it generates and radiates lots of RF energy.? Even your smart phone intentionally generates and intentionally radiates RF energy.? Digital circuitry runs on square waves.??
What does it take to generate a square wave (other than a saturated linear circuit)?? Consult Mr. Fourier.? If you don't know, look up Mr. Fourier. ? If your 2 GHz clock "powering" your ?processor generated only 2 GHz, that would be a sine wave, not a square wave.? Not so for digital circuitry.? Again, have a read under Mr. Fourier and specifically the Fourier Series.? You'll learn something.