Broadband zero phase center high-precision antenna of butterfly oscillator structure

Abstract

The present invention provides a broadband zero phase center high-precision antenna of a butterfly oscillator structure. The broadband zero phase center high-precision antenna comprises an antenna main radiation unit, a resonant cavity, a feed structure and a parasitic radiation structure. The antenna main radiation unit comprises a square PCB, an oscillator structure, a main radiation unit grounding plate and a regulation branchknot; the regulation branchknot is connected with the oscillator structure; the oscillator structure comprises four hexagonal radiation paster oscillators with hollowstructures and with dimensions; the corner of each hexagonal radiation paster oscillator comprises one feed angle and one wing tip angle opposite to the feed angle; the feed angles of the oscillatorsare integrally arranged at the centers of the square PCB and are connected with the feed structure; the side boundary of the feed angles of the adjustable oscillators are close neighbor and in parallel to each other; the wing tip angles of the oscillators are respectively arranged at the four corners of the square PCB to allow the oscillator structure to be a butterfly wing shape; and the parasitic radiation structure is round the antenna main radiation unit, and the lower portion of the main radiation unit grounding plate is connected with the resonant cavity. The broadband zero phase centerhigh-precision antenna of a butterfly oscillator structure has a high gain, a wide beam and a wide band, and is stable in phase center and high in anti-multipath effect capacity.

Description

technical field [0001] The invention relates to the technical field of satellite navigation terminal antennas, in particular to a broadband zero-phase center high-precision antenna with a butterfly oscillator structure. Background technique [0002] With the rapid development of Global Navigation Satellite System (GNSS, Global Navigation Satellite System), satellite navigation terminal equipment has more and more requirements for multi-system compatibility and high positioning accuracy. As the receiving front-end of satellite navigation terminal equipment, the satellite navigation terminal antenna has a great impact on the performance of the satellite navigation terminal. In order to be compatible with multiple satellite navigation systems, the antenna should have a wide gain bandwidth, axial ratio bandwidth and impedance bandwidth. features. In order to improve the positioning accuracy of the satellite navigation terminal, the terminal antenna should also consider the char...

AI Technical Summary

Problems solved by technology

In order to ensure that the antenna can cover all the frequency bands of the satellite navigation system, it is necessary to use a very thick dielectric to design the antenna. The increase in the thickness of the antenna dielectric substrate not only greatly increases the product cost and increases the product weight, but also the surface wave of the microstrip antenna will increase with the thickness of the antenna. The increase increases, which seriously affects the performance of the antenna

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