Micro-strip navigation antenna with air back cavity

Abstract

The invention relates to the technical field of satellite navigation antennas and particularly discloses a micro-strip navigation antenna with an air back cavity. The inner part of the structural cavity in a navigation antenna package is of a groove structure, and the peripheral walls of the groove structure form a structural cavity enclosure structure, and a micro-strip printed board emitting layer radio-frequency substrate is installed on the structural cavity enclosure structure, so that the micro-strip printed board radiation layer radio-frequency substrate and the structural cavity form an air back cavity radiation layer; a micro-strip printed board radiation layer metal pattern is printed on the upper surface of the micro-strip printed board radiation layer radio-frequency substrate,a feed connector is arranged on the back of the structural cavity, so that a feed connector conductor in the feed connector penetrates through the structural cavity and is connected with the metal pattern. The air back cavity radiation layer additionally arranged in the structural cavity is used, so that the defects that a traditional micro-strip satellite navigation antenna is small in radiationbandwidth, low in radiation efficiency, poor in directionality and the like are overcome, and the engineering problem for the micro-strip antenna being installed in large temperature change and beingused for actual satellite navigation applications such as approaching multi-frequency points and the like is solved.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation antennas, in particular to a microstrip navigation antenna with an air-back cavity. Background technique [0002] After the microstrip antenna was proposed in the early 1970s, it attracted great attention in the field of antenna engineering, which far surpassed any other field of antenna research and development. Microstrip antennas have several well-known advantages over other antennas, including low profile, light weight, low fabrication cost, robustness, and compatibility with microwave monolithic and optoelectronic integrated circuits, among others. Because of these advantages, the microstrip antenna has become the most widely used receiving antenna for satellite navigation terminals such as GPS and BD II. [0003] But traditional microstrip antennas also have inherent defects: narrow bandwidth, and relatively low radiation efficiency due to surface wave excitation, conductor and...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a microstrip navigation antenna with an air-back cavity, which solves the engineering problems faced by the actual satellite navigation applications such as the microstrip antenna is installed in a large temperature change and is used near a multi-frequency point. It can obtain a wider Impedance bandwidth, circular polarization radiation bandwidth, and high radiation efficiency

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