Tri-band satellite navigation antenna for COMPASS, GPS and GLONASS

Abstract

A tri-band satellite navigation antenna for a COMPASS, a GPS and a GLONASS comprises three layers of micro-strip antenna bodies, feed coaxial probes, metal clamp plates, strip line mediums, feed networks and a set of metal screws. High-dielectric-constant ceramic mediums are adopted in all the mediums of the three layers of micro-strip antenna bodies so as to reduce the size of the antenna. Circular polarization of the first-layer micro-strip antenna body is realized through the methods of single-point feed and angle cutting on a metal patch, and circular polarization of the second-layer micro-strip antenna body and circular polarization of the third-layer micro-strip antenna body are realized through double-point feed. The number of the feed probes contained in the medium of each layer of micro-strip antenna body is not more than two, so that three ports have better electromagnetic isolation. The set of metal screws is arranged around the micro-strip antenna bodies, the metal screws can be used for fixing the metal clamping plates and strip line feed layers, and the metal screws can also expand the lobe width of the antenna. The tri-band three-port antenna has the advantages of being small in size, low in section, wide in lobe, good in low elevation angle gain and axial ratio and high in port insulation degree, and suiting to be used as a satellite navigation terminal receiving antenna.

Description

technical field [0001] The invention relates to a three-frequency three-port circularly polarized satellite navigation receiving antenna, which is suitable for satellite navigation system terminal equipment. Background technique [0002] Satellite navigation and positioning system is a new generation of satellite radio navigation and positioning system established with the development of science and technology. It can provide users with real-time, continuous, high-precision and all-weather navigation and positioning information. It has been widely used in military and civilian fields. . The satellite navigation and positioning systems owned by countries in the world today include the Global Positioning System (GPS) of the United States, the GLONASS system (GLONASS) of Russia, the Galileo system (GALILEO) of the European Union and the Beidou satellite navigation and positioning system (COMPASS) of my country. The Beidou navigation and positioning system is a positioning syst...

AI Technical Summary

Problems solved by technology

Among them, the element antenna and the helical antenna have a high profile, which is not suitable for some occasions that require high antenna height; the microstrip antenna usually achieves multi-frequency or broadband by stacking layers, and each layer of microstrip patch is fed by a probe Electricity, but this antenna form has poor gain at low elevation angles and serious mutual coupling between its ports

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