You can easily jam or overpower a faint satellite signal with a local ground-based antenna.
Or you can shoot down your enemy's satellites and screw up the orbit so he can't launch any more.
Or you can shoot down your enemy's satellites and screw up the orbit so he can't launch any more.
Pretty sure Myanmar can't do that.
Seriously, though, if the tech needs to be actively camouflaged and there's death penalty only for its possession, there's no way many people will use it. So it will be useless to inform and organize people, it will be useless to broadcast what's really happening inside.
Not doable unless either you are in between the dish and the satellite, or have an extremely powerful transmitter with its directional antenna pointed to the dish, where all that power is needed to cope with the fact that the maximum sensitivity of the dish is towards the satellite, not your jammer. Which also means that they need one jammer and its antenna for every dish they want to silence. That would not scale well.