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Octagonal flat-type array antenna

An array antenna and flat-panel technology, applied in antennas, antenna arrays, antenna grounding devices, etc., can solve the problem of stability and anti-multipath ability affecting measurement accuracy, affecting receiver system measurement accuracy and application range, using frequency band, phase Center stability, anti-multipath ability, balance of circular polarization gain and good wide-angle circular polarization characteristics are difficult to fully satisfy, so as to achieve the effect of stable radiation phase center, light structure and good anti-multipath performance

Active Publication Date: 2012-05-02
北京华力创通科技股份有限公司
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AI Technical Summary

Problems solved by technology

The stability of the antenna phase center and anti-multipath ability of the satellite navigation and positioning system receiver directly affect the measurement accuracy of the carrier phase of the receiver, which in turn affects the measurement accuracy and application range of the receiver system
[0003] In the prior art, commonly used antennas include microstrip patch antennas, four-arm helical antennas, and multi-arm planar helical slot antennas. It is difficult to fully meet the requirements of GNSS compatible receivers for high-precision carrier phase measurement in terms of equalization and good wide-angle circular polarization characteristics

Method used

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specific Embodiment

[0031] It mainly includes the following five parts:

[0032] Central radiating unit assembly, two sets of radial parasitic coupling plates arranged symmetrically and equidistantly, grounding plate and grounding plate cavity, circularly polarized four-point feed network, and radome.

[0033] The antenna is installed on a grounded cavity with a diameter not exceeding 200mm, and the central radiation unit assembly is 30mm high, which is the main body of the antenna radiation.

[0034] The grounding plate cavity is a circular cavity with an outer flange, and the entire feed network is enclosed and installed in the grounding plate cavity. Two groups of parasitic coupling plates are evenly distributed on the ground plane cavity. One group is arranged on the outer periphery of the central radiation unit assembly, and consists of 12 coupling plates arranged at equal intervals along the radial direction; the other group is arranged under the top plate of the central radiation unit ass...

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Abstract

The invention discloses an octagonal flat-type array antenna comprising an earth plate and a circularly-polarized four-point feeding network, wherein the earth plate is provided with a central radiating element assembly and two groups of coupling plates arranged by equal distance along the radial direction. The octagonal flat-type array antenna can receive signals transmitted by a plurality of navigation and positioning satellite constellations and meet the requirement for high-precision carrier phase measurement. A high-precision receiver antenna for GNSS (Global Navigation Satellite System) carrier phase measurement can be provided for users of ocean, land, air and space, and the octagonal flat-type array antenna can also be popularized and applied to a radio transmitting and receiving system with a stable radiating phase center and a circular polarization and hemisphere beam coverage requirement. The octagonal flat-type array antenna has the characteristics of stable radiating phase center, circular symmetry of radiation pattern, high roll-off, high front-to-back ratio and favorable wide angle circular polarization, has favorable anti-multipath and broadband operation capacity and is a novel GNSS high-precision carrier phase measurement type user compatible receiver antenna.

Description

technical field [0001] The present invention relates to a GNSS (GNSS is the abbreviation of Global Navigation Satellite System, representing the Global Navigation Satellite System) user receiver antenna, in particular to an octagonal flat panel array antenna. Background technique [0002] Global satellite navigation system (GNSS=global navigation satellite system) is also called space-based PNT (position, navigation, timing) system. Global Navigation Satellite System (GNSS) is a satellite-based radio navigation and positioning system. It has omnipotent (sea, land, air, sky), global, all-weather, continuous and real-time navigation, positioning and timing functions. The stability of the antenna phase center and anti-multipath ability of the satellite navigation and positioning system receiver directly affect the measurement accuracy of the carrier phase of the receiver, and then affect the measurement accuracy and application range of the receiver system. [0003] In the pr...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/48H01Q21/00
Inventor 叶云裳姜新发苑九功钟睿黄夔夔那成亮李光成
Owner 北京华力创通科技股份有限公司
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