Earlier quoted context omitted.
> Jammers (to my knowledge) operate by actively producing an inverted copy of the signals it actually sees. No. Usually, all you need is to do is to send a signal - any signal - on a frequency you want to jam with enough power to overwhelm the target signal. A directional antenna won't get a milliwatt satellite signal if it starts picking up half a kilowatt of random noise, even if that noise is coming from the side.…
Seems like it'd be pretty straightforward to block signals coming from the side (e.g. by putting some metal or something else similarly RF-blocking between the antenna and the jammer), no? Kinda like how wearing a hat helps keep the sun out of your eyes. Actively jamming the jammer (i.e. inverting the signal received from the jammer side and rebroadcasting on the the antenna side) would help, too, though this probabl…
Depends on the wavelength and your surroundings. Imagine yourself wearing a cap that's little too small and half-transparent on the edges, walking on fresh snow, surrounded by snow mounds, trying to spot something on one of the hilltops nearby. So the cap mostly protects you from direct jamming signal, but reflections and bleed are still painful.
Now we're talking here about satellites, in particular LEO satellites, so you need a mass market (or at least commercial-grade) tracking antenna, which will have to look all across the sky and not just point straight up. In urban environments, there's a great chance there will be scores of decent reflectors (buildings) all around you for the jamming signal to bounce off, and as for bands, the ones used by Starlink are ones that are unlikely to be used much for anything else in places like Iraq - so they may as well just jam the whole band. And since Starlink is a commercial service, you won't be able to switch to something the government depends on (not to mention procure new antennas and adjust software on the transceivers).