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 '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  that it looked like the Borg were placing the beacon on top of the Enterprises particle emitter. ()

In the Second Year of Hell, Kathryn Janeway stabilized the particle emitters of the  from deflector control, allowing Tuvok to generate a deflector field that protected the ship from a micrometeoroid storm. ()

Spacecraft components