Developed by various defense companies, the Trophy system is basically an active forcefield around a tank or an armored vehicle to defend against RPG rounds. It's not an actual forcefield like the USS Enterprise, it's a system that detects when a round is incoming and shoots out a projectile to eliminate the threat. Best of all, there's only a 1% chance of injuring surrounding personnel when the round is exploded. – Jason Chen

(Video) Trophy Active Defense System: Invisible Forcefield [TecheBlog - Thanks Dave!]