Google ISM frequencies...
Those are the worldwide (mostly) license free Throwaway Frequencies for industrial, scientific, and medical.
If your unit is totally shielded, and has RF line filters, and is tested to ensure it complies with emissions regulations, you can get away with just about anything you want except aviation, navigation, and safety of life/destress frequencies.
That compliance is costly if your RF engineer doesn't know what he/she/it is doing. If they do, compliance is cheap and is mostly sheet metal and a input line filter and some RF chokes. For a laser you need a good RF engineer anyways.
No, I don't do that anymore, but I have on a small lab scale in the past. Your product gets designed by a good RF engineer, with a 3200$ spectrum analyzer or ~6000$ network analyzer (used price) then approved by a testing lab with hundreds of thousands of Dollars worth of gear. It typically takes two trips to the certified approval shop. You'll end up butting heads against a conducted emissions LISN test, and radiated emissions test anyways.
Faraday shields, RF line filters, inductors on control and power cables, ferrite chokes, and copper sheet metal fingers for gap sealing are your friends.
Just say no to Tesla, say yes to an off the shelf RF amp from a place like Communications Concepts or similar. Modern industrial RF sources are amazingly efficient.
Tesla is a great way to flunk emissions testing before you even get there. Tesla coils spew noise like a volcano, and would be 1920s RF technology, horribly inefficient for what you want to do,
Find yourself a 1990s copy of the ARRL handbook and start reading on impedance matching and coaxial cable. There are 600,000 Ham Radio operators in the US, and 5-10% of them can do what you need in their sleep in terms of basic design.
Steve
Last edited by mixedgas; 02-09-2021 at 07:51.
Qui habet Christos, habet Vitam!
I should have rented the space under my name for advertising.
When I still could have...