The distinction between analog and digital signals is very simple, but it can still be a challenge to wrap one's mind around the concepts that define the two systems. Just when you think you've got it ...

Multipath interference disrupts wireless signals, causing issues like TV ghosting and fading. Now, researchers have developed a passive metasurface that overcomes traditional filtering limits. Using a ...

Nearly a million homes may need to be installed with filters to prevent interference on their television pictures following the launch of 4G mobile signals, with the mobile firms due to cover the ...