[adrian_b]

This is not EMP.

It is just a high-power microwave transmitter, made with gallium nitride field-effect transistors.

Like any microwave transmitter, it can use a directional antenna. If the antenna is big enough, it can have a narrow enough transmitted microwave beacon to intercept only a single drone.

The GaN FETs enable a higher transmitter power at whatever high frequency they are using. At lower frequencies, a 70-kW power was already easily achievable in the past. The higher frequency allows a precise aiming of the microwave beacon with an antenna of reasonable size.

[varenc]

I believe they're using a phased array grid of emitters to electronically steer the microwave, not just a normal directional antenna. This means the antenna doesn't need to physically move to change what is pointing at. (within some bounds)