In the movie 'Interstellar':
When Cooper and his team was inside the wormhole near to the Miller's planet, they were getting signals from the earth but nothing was going out.
Now my questions are: (a) How were the signals from the earth sent to them? Because radio communication in deep space requires focusing (facilitated by dish and high gain antenna) to have a particular direction for the radio signals in order to not dilute them. When the signal will cross the wormhole it will be in a deep space in new world and it will not have any particular direction it will not have any particular direction or it will lost its direction and the signals will be extremely diluted before it reaches Endurance or may be possibly never reach.
(b) What may be the possible reasons of no signals getting out?