Rotary device and satellite antenna

The invention belongs to the technical field of revolving body antennas, and particularly relates to a rotary device and a satellite antenna. The rotary device comprises a rotary structure, which comprises a rotary disc, a driver for driving the rotary disc to rotate around a certain fixed axis in a reciprocating manner, and a pushing block connected with the rotary disc; an induction control structure, which comprises an induction mechanism connected with the rotary disc, a trigger mechanism used for triggering the induction mechanism to send out an induction signal, and a controller used for receiving the induction signal from the induction mechanism and controlling the driver according to the induction signal; and a limiting structure which comprises a rotary base which is arranged opposite to the rotary disc and provided with a guide groove, wherein one end of the trigger mechanism is arranged in the guide groove in a sliding mode, and the other end of the trigger mechanism is located on the rotating path