Particle emitter

A particle emitter was a component of Starfleet vessels, located in the middle of the navigational deflector. It was used notably on starships. In April 2063, the Borg began to construct an interplexing beacon on the USS Enterprise (NCC-1701-E)'s deflector to contact reinforcements from the Delta Quadrant. While assessing the Borg's actions in environmental suits, Captain Jean-Luc Picard told Worf and Hawk that it looked like the Borg were placing the beacon on top of the Enterprise's particle emitter.