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Anti-multipath-interference broadband low-axial-ratio GNSS antenna

An anti-multipath, low axial ratio technology, applied in antennas, antenna unit combinations with different polarization directions, antenna coupling, etc., can solve the problems of difficult control of stability and complicated antenna processing, and achieve good performance, small size, The effect of increasing the antenna gain

Active Publication Date: 2017-03-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing of the antenna is more complicated, and the stability is not easy to control

Method used

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  • Anti-multipath-interference broadband low-axial-ratio GNSS antenna
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  • Anti-multipath-interference broadband low-axial-ratio GNSS antenna

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with specific examples.

[0023] Such as Figure 1 to Figure 4 As shown, the anti-multipath broadband low-axis ratio GNSS antenna described in this embodiment includes four identical rectangular radiation elements 1, and the dielectric substrate 2 is a circle with FR_4, a dielectric constant of 4.4, a thickness of 1 mm, and a radius of 72 mm. Disc; figure 2 For the disc-shaped floor on the front of the dielectric substrate, four identical via circles 3, and corresponding vias 6, feed via circle 4 and feed via 5, cut off four via circles and a feed A disc-shaped floor 7 with a round hole; image 3 It is a microstrip line power division phase-shifting network on the back of the dielectric substrate, in which the ring power divider is composed of a flower-shaped microstrip line 8 and a linear microstrip line 9, a Wilkinson power divider 10, an isolation resistor 11, and an impedance Gradient microstri...

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Abstract

The invention discloses an anti-multipath-interference broadband low-axial-ratio global-navigation-satellite-system (GNSS) antenna comprising four rectangular radiating units, corresponding four triangular matching connection units, four via holes, a microstrip line power divider phase-shift network, a feed via hole, a dielectric substrate, a circular plate type floor, four via hole round units, a feed via hole round unit, and a metal cylinder. The four rectangular radiating units and the four triangular matching connection units form a centric symmetric structure and are arranged right above the dielectric substrate. The four via holes pass through the dielectric substrate to realize communication between the triangular matching connection units and the port of the microstrip line power divider phase-shift network. The microstrip line power divider phase-shift network is arranged at the back of the dielectric substrate. The feed via hole is used for connecting the microstrip line power divider phase-shift network with a conductor arranged inside a coaxial feeder. The circular plate type floor is arranged at the front side of the dielectric substrate and the edge of the circular plate type floor is connected with the metal cylinder. The anti-multipath-interference broadband low-axial-ratio GNSS antenna disclosed by the invention has characteristics of good anti-multipath-interference performance, broadband, low axial ration, wide beam, and small size and the like.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a broadband low-axis-ratio GNSS antenna capable of resisting multipath interference. Background technique [0002] GNSS refers to the Global Navigation Satellite System (Global Navigation Satellite System), and the GNSS antenna is the terminal antenna for receiving satellite signals. With the addition of the Beidou satellite positioning system, the main members of the GNSS system have become four: GPS in the United States, GLONASS in Russia, Beidou in China, and Galileo in Europe. In view of the huge economic value of the satellite navigation system and the strong military strategic demand, GNSS, as a high-tech competition highland, has always been valued by various countries. GNSS antennas require special design due to the different polarization receiving methods from mobile communication antennas, and because of their complex application scenarios and greater interference, the performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q23/00H01Q21/24H01Q1/52H01Q1/24H01Q1/36H01Q1/50H01Q3/34
CPCH01Q1/24H01Q1/36H01Q1/50H01Q1/52H01Q3/34H01Q21/24H01Q23/00Y02D30/70
Inventor 褚庆昕周涛
Owner SOUTH CHINA UNIV OF TECH
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