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this post was submitted on 22 Jan 2024
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SDR? It has to be the largest signal in the area right?
Move to 3 points to triangulate quickly when signal is lost to noise and vector to the location regardless of continuous transmission.
I want to know why anti-drone systems are not simply using diode lasers and simple trackers to blind/fry the optics. Seems to me that a system should be about as cheap as the average drone, and they all seem to rely heavily on optical sensors.
do you have any idea how big antenna array has to be for it to have any angular resolution
Nope
you need something like square array sized at about 2 wavelengths wide, this can easily get into 50x50cm range at lower frequencies
because you have to find drone first, acquire its location and quite precisely at that, and at this point short burst of 12.7mm is more reliable. jammers don't need any directivity and work over any number of drones in area covered
Guns are heavy and slow. Light is near instantaneous and has no trajectory. A targeting laser can move extremely fast and a 360° camera with AI object recognition can pick up targets faster than any human. Targeting does not need to be accurate as a common high power diode laser can fry any optical sensor upon contact. Just aim and add a little jitter in the region of the issue. It should also be possible to use UV lasers that are outside of the visual spectrum. It is not hard to spot these with optics designed for the task, but most military optics seem to focus on IR, so UV should be much less visible while being much higher energy and causing more damage quickly. It should be possible and not require the radio emissions of a jammer.
lasers with power required would be also pretty heavy, and only as fast as operator, so about the same as AA guns