Satellite signal receiver and satellite positioning system

Abstract

The application relates to the technical field of satellite positioning, in particular to a satellite signal receiver. The satellite signal receiver can include a doubly fed network antenna used for receiving a satellite radio frequency signal, a frequency mixing coupler connected with the doubly fed network antenna and used for shifting the phase of the satellite radio frequency signal, and a radio frequency circuit board. The doubly fed network antenna and the frequency mixing coupler are integrated on the radio frequency circuit board. The cost of equipment and the complexity of the systemare reduced by integrating the doubly fed network antenna and the frequency mixing coupler on the radio frequency circuit board. High-precision positioning information is provided by raising the impedance bandwidth of the antenna, increasing the antenna gain and improving the half power beam width of the antenna. Moreover, the phase center is made more precise by reducing the axial ratio of the antenna, so that the antenna still has a good receiving effect in a mobile environment, and the satellite signal receiver has strong anti-multipath-interference performance.

Description

technical field [0001] The present application relates to the technical field of satellite positioning, in particular to a satellite signal receiver and a satellite positioning system. Background technique [0002] At present, satellite receivers generally include board receivers without antennas and board receivers with integrated antennas. [0003] Among them, although the board receiver without an antenna can achieve decimeter-level or even centimeter-level high-precision positioning through an external antenna, the antenna and the main body of the board need to be separated from each other, which will increase the complexity of the system and the overall equipment. The cost of the integrated antenna board card receiver generally uses a single-feed antenna, although it can be integrated into one, but it cannot meet the high-precision positioning requirements such as decimeter level and centimeter level. [0004] In addition, in a mobile environment, vibration, displaceme...

AI Technical Summary

Problems solved by technology

[0003] Among them, although the board receiver without an antenna can achieve decimeter-level or even centimeter-level high-precision positioning through an external antenna, the antenna and the main body of the board need to be separated from each other, which will increase the complexity of the system and the overall equipment. The cost of the integrated antenna board card receiver generally uses a single-feed antenna, although it can be integrated, but it cannot achieve high-precision positioning requirements such as decimeter level and centimeter level

[0004] In addition, in a mobile environment, vibration, displacement, etc. will also reduce the receiving effect of the antenna of the integrated antenna board receiver, and it is vulnerable to the adverse effects of multipath interference

Images