4 ms·
>Your jammer just needs to be louder than the satellite by as much as the antenna gain. Given that the satellite is 42000km away, while the jammer can easily be
by uvdiv 16y ago
>Your jammer just needs to be louder than the satellite by as much as the antenna gain. Given that the satellite is 42000km away, while the jammer can easily be 10km away, the jammer signal has a 70dB "gain" just from being closer.
You've underestimated the signal strength from the satellite; it would be very wasteful for a GEO satellite to transmit in all directions, which would send 99.5%+ of the signal into space. So add at least 20-30 dB for the directionality of the satellite's antenna.
- kragen 16y agoYou're right; you have to be louder than the satellite's EIRP, not the satellite's actual radiated power. In theory there's no ceiling on how directional the satellite's antenna could be, is there? But I'm guessing your 20–30dB guess is right.