Dynamic tracking satellite antenna

Abstract

The invention relates to a dynamic tracking satellite antenna. The antenna comprises an azimuth posture detection part, a signal level detection part and a servo system, wherein the master control servo system is a Z-axis adjusting stepping motor; the azimuth posture detection part is only formed by a Z-axis gyroscope and an accelerometer; the Z-axis gyroscope measures the moving direction and the speed of the antenna in the horizontal direction, and the included angle of the antenna relatively to a horizontal surface is measured by the accelerometer; and the servo system is controlled by a master control CPU to constantly adjust an azimuth angle, a roll angle and a pitch angle of the antenna so as to achieve the aim of dynamically tracking a satellite. The dynamic tracking satellite antenna has the advantages of low cost, simple structure and good tracking effect.

Description

technical field [0001] The invention relates to a satellite antenna, in particular to a dynamic tracking satellite antenna capable of adjusting azimuth angle and elevation angle during movement. Background technique [0002] Mobile satellite antennas refer to antennas installed on mobile carriers, such as cars, trains, ships, etc. Because broadcasting satellites and communication satellites all belong to fixed-point satellites (ie, synchronous orbit satellites), the satellites are positioned at about 40,000 kilometers above the equator. The satellite antenna is also a directional antenna. The beam width of this antenna is very narrow. To ensure that the signal transmission is not interrupted during the rapid movement of the carrier, it is necessary to ensure that the antenna is always accurately aligned with the target satellite. [0003] During the movement of the mobile carrier, due to the change of the road turning direction and the influence of the slope, the azimuth an...

AI Technical Summary

Problems solved by technology

[0004] This method has the following disadvantages: ① The alignment accuracy of the satellite antenna during the movement is completely dependent on the measurement accuracy of the inertial navigation system such as the gyroscope

Therefore, high-precision sensors such as fiber optic gyroscopes and laser gyroscopes can only be used, resulting in a substantial increase in overall costs

②The use of GPS can only obtain the reference pitch angle of the location of the satellite antenna, and the movement away from this direction still needs to rely on the gyroscope, which increases the parameter requirements of the gyroscope

③Electronic compass is a magnetic device, which is susceptible to external interference

The advantages of this invention are low cost, light weight, small size, and no interference from geomagnetic anomalies, but its tracking accuracy is far less accurate than that of inertial navigation technologies such as gyroscopes.

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