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

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...

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