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

A satellite navigation antenna, Beidou technology, applied in independent antenna unit combination, antenna coupling, resonant antenna and other directions, can solve the problems of high profile antenna and helical antenna, poor antenna gain at low elevation angle, serious port mutual coupling, etc. Improve low elevation gain, widened lobe width, and small volume

Active Publication Date: 2013-11-27
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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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-frequenc

Method used

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

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[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] like Figure 1-3 Shown is a schematic diagram of the structure of the three-frequency three-port satellite navigation antenna of the present invention. The medium of the three-layer microstrip antenna of the present invention adopts a ceramic substrate with a dielectric constant of 10.45 to reduce the size of the microstrip antenna. The dielectric size of the first layer of microstrip antenna is 20.4mm×20.4mm×1.5mm; the dielectric size of the second layer of microstrip antenna is 31.5mm×31.5mm×7mm; the dielectric size of the third layer of microstrip antenna is 38.8mm×38.3mm ×9mm. The stripline medium adopts a medium with a dielectric constant of 3 and a thickness of 0.504mm. The diameter of the stripline medium and the metal splint is 60mm (0.25λ), and the overall height of the antenna is 21.5mm (0.09λ), where λ is the wavelength cor...

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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...

Claims

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Application Information

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IPC IPC(8): H01Q9/04H01Q1/52H01Q21/30
Inventor 欧阳骏韩旺旺李岩张凯之隆锐
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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