They have lasers that can destroy satellites in geosynchronous orbit. That's over 22,000 miles. They fire it twice. The first shot burns any atmospheric impurities and the second shot is through a near vacuum. A company I worked with had a portion of the contracts. The EMP weapons already exist as well. There are videos on how to build one with a microwave oven. I have been tempted to build one but there are unintentional side effects on the user. Partially cooking yourself and damaging your own equipment.A laser could be used. Or a very narrow directional microwave type system be employed and heat it to melting or destroy the electronics. Aimed directly at target. This tech already exists and is being tested and probably used.