A while back, I'd been researching the general topic. Health problems fog my memory, but essentially I was trying to figure out how closely the proclaimed application/purpose actually fit the actual capabilities. I found, what seemed to me, evidence that the military systems are not hard limited to the specific advertised GHz/len spectrum, but can be adjusted for lethal purposes.

Possibly the "safeguard" portion of the first patent below indicates this; which may only make sense if such devices are capable of exceeding lawful spectrums, etc. Not sure though.

The others I just threw in. I am not in the right space to vet or read them right now, so they may or may not be relevant. That said, I did once interview a soldier who told me of some off-the-record use of directed energy in Iraq/Afghanistan... describing bodies with relatively intact exteriors with internal damage not fitting of thermobaric weapons, ie vehicles also intact. Terms used were "cooked from the inside". Anecdotal, but disturbing, and certainly physically possible.

1. https://patents.google.com/patent/US7921588B2/en

2. https://patents.google.com/patent/US20220082358A1/en

3. https://patents.google.com/patent/US7784390B1/en

4. https://www.patentbear.com/patents/US7490538B2