Multi-frequency navigation terminal antenna

Abstract

The invention belongs to the technical field of communication and navigation and in particular relates to a multi-frequency navigation terminal antenna. A top-layer feeding point is arranged at the center of a first-layer micro-strip patch; a central feeding hole is vertically formed in the top-layer feeding point; a first feeding point is arranged at a second-layer micro-strip patch; a first feeding hole is vertically formed in the first feeding point; a second feeding point is arranged at a third-layer micro-strip patch; a second feeding hole is vertically formed in the second feeding point; a third feeding point is arranged at a fourth-layer micro-strip patch. The antenna also comprises first short circuit metallized via holes and second short circuit metallized via holes which are used for eliminating coupling influence of feeding probes in all the feeding holes. The multi-frequency navigation terminal antenna disclosed by the invention can cover L band and S band of first-generation Beidou, B1 band and B3 band of second-generation Beidou and L1 band of a GPS (Global Positioning System); the demands on minimization and lightness of antenna size are met while good impedance bandwidth, axial ratio bandwidth and high-gain performance can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of communication and navigation, and in particular relates to a multi-frequency navigation terminal antenna. Background technique [0002] The Beidou satellite navigation system is a global satellite navigation and communication system independently developed by my country. It is also known as the world's four major satellite navigation systems together with GPS in the United States, GLONASS in Russia, and Galileo in Europe. With the gradual improvement and wide application of the Beidou navigation system, the research on its terminal antenna is becoming more and more extensive and in-depth. The current navigation terminal antenna mainly has technical problems such as difficulty in terminal equipment integration, narrow frequency band, inability to accommodate multiple operating frequency points, and even poor isolation of multi-band ports. In view of this, the current multi-frequency circularly polarized a...

AI Technical Summary

Problems solved by technology

However, in actual production, it was found that since each layer of the patch with the feed probe needs to arrange a circle of metallized vias outside the feed hole, this makes it necessary not only for the feed hole at the current layer patch An area is reserved on the periphery for metallized vias to penetrate, and at the same time, the bottom patch must also have enough area to accommodate the densely packed metallized vias that are stacked and penetrated from the upper layer and even the upper layer. It can only be guaranteed by increasing the patch area of ​​the bottom layer, which is obviously extremely unfavorable to the current miniaturization requirements of the antenna volume

Images