The 19-beam receiver is a specialized system developed for the FAST telescope based on feed-array multi- horn array technology. Its front-end comprises 19 set of identical horns and receivers, operating over a frequency range of 1.05～1.45GHz. The 19 horns are arranged in a hexagonal pattern, with the central horn positioned at the focus during observation and the other 18 horns on the focal plan of the FAST telescope. This configuration enables their corresponding far-field patterns to point toward distinct sky areas, allowing simultaneous observations of 19 celestial areas. Compared to a single beam receiver, the 19-beam receiver will increase the speed of survey observations by a factor of 19. 
As the largest multi-beam receiver at L-band in the world, the 19-beam receiver plays an important role in FAST’s the pulsar survey, FRB detection and neutral Hydrogen mapping observations.