BeiDou microstrip antenna loaded with wrench type resonant rings

Abstract

The invention discloses a BeiDou microstrip antenna loaded with wrench type resonant rings and relates to a microstrip antenna. The BeiDou microstrip antenna is provided with a medium substrate, upper and lower surface good conductor layers and a coaxial feed structure; the upper and the lower surface good conductor layers are respective coated at upper and lower surfaces of the medium substrate; the upper surface layer is a square patch which is arranged on the middle of the medium substrate; two wrench type resonant rings are symmetrically loaded at a pair of opposite angles of the square patch; each wrench type resonant ring consists of an isosceles-right-triangle-shaped cut corner, a rectangular gap and a circular ring notch groove; the vertex of the isosceles-right-triangle-shaped cut corner is superposed with the vertexes of the selected loading opposite angles; two right-angle sides of the isosceles-right-triangle-shaped cut corner are positioned on two sides, jacked out from the vertexes,. of the square patch; one short side of the rectangular gap is superposed with the inclined side of the isosceles-right-triangle-shaped cut corner; the other short side of the rectangular seam is a chord of the outer circle of the circular ring notch groove; the circle center of the circular ring notch groove is positioned in a position, on a diagonal line of the group of the selected loading opposite angles, of the square patch; and a coaxial inner conductor in the coaxial feed structure is connected with the square patch.

Description

technical field [0001] The invention relates to a microstrip antenna, in particular to a large broadband, high-gain wrench-type resonant ring-loaded Beidou microstrip antenna compatible with the working frequency points of the Beidou satellite system and the GPS system. Background technique [0002] The Beidou Satellite Navigation and Positioning System (BeiDou) is a regional active three-dimensional satellite positioning and communication system (CNSS) independently developed by my country for all-weather, high-precision, large-scale, fast and real-time positioning. It is the third mature satellite navigation system after the US Global Positioning System (GPS) and the Russian GLONASS Satellite Navigation System (GLONASS). At present, the navigation system has realized the positioning, timing and message functions in China and its surrounding areas, and has gradually penetrated into many fields such as surveying and mapping, telecommunications, water conservancy, transportat...

AI Technical Summary

Problems solved by technology

However, general microstrip antennas also have problems such as narrow frequency band, low gain, and poor end-fire performance, and the shape of the antenna patch has a direct impact on the frequency band, gain, and polarization of the antenna.

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