Satellite antenna

Abstract

The invention relates to the field of antennas, and provides a satellite antenna. The satellite antenna comprises a paraboloid, a waveguide, a tuner, a subreflector, a conical scanning motor, a protecting cover, a tuner fixing device, a polarizing motor, a conveyor belt, a bearing fixing device and an optical coupler; the conical scanning motor is fixed to the protecting cover and used for driving the subreflector to rotate to realize conical scanning; the optical coupler is fixed to a fixed conical scanning motor board; the protecting cover is fixed to the radiating end surface of the waveguide; the other end of the waveguide is connected with the paraboloid; the tuner is fixed to the tuner fixing device; the polarizing motor is arranged on the outer surface of the paraboloid and used for driving the tuner to rotate through the conveyor belt. According to the technical scheme, the satellite antenna has the advantage that the polarizing motor can be simply rotated to enable the rotating of a tuner polarizing angle, and therefore, the problem caused by a polarizing shaft of the satellite antenna can be solved, and the satellite searching flexibility of the satellite antenna can be improved.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a satellite antenna. Background technique [0002] In the shipborne satellite antenna, the support frame is replaced by the combination of the secondary reflector and the waveguide to reduce the gain loss and the installation error, such as figure 1 Shown, is the sectional view of satellite antenna, and this satellite antenna comprises parabolic surface 101, tuner 102, secondary reflector 103, conical scanning motor 104, housing 105, waveguide 106 and optocoupler (not shown in the figure); Conical scanning motor 4 Drive the sub-reflector 3 to rotate at a high speed to realize conical scanning and tracking satellites. Since the signal in the pitch and yaw directions needs to be sampled during the conical scanning process, and the position of the sampling point is related to the position of the optocoupler, the satellite antenna usually requires the position of the optocoupler to be fixed ...

AI Technical Summary

Problems solved by technology

Since the signal in the pitch and yaw directions needs to be sampled during the conical scanning process, and the position of the sampling point is related to the position of the optocoupler, the satellite antenna usually requires the position of the optocoupler to be fixed during the working process, which makes this antenna usually It is a two-axis form (pitch and yaw automatic control), but lacks the automatic control of the polarization axis. The polarization axis refers to the polarization angle of the high frequency head, which reduces the flexibility of antenna polarization control

Images