Three-dimensional meandering substrate integrated waveguide near-field focusing scanning leaky-wave slot array antenna

Abstract

The present invention is a three-dimensional meandering substrate integrated waveguide near-field focusing scanning leaky wave slot array antenna. The overall shape of the antenna is a smooth curved surface, and the curved surface is formed by connecting at least two curved surfaces. Adjacent curved surfaces have The same tangent plane, the two ends of the antenna are planar feed structures tangent to the smooth surface; the antenna includes two metal copper clad layers, the upper and lower metal copper clad layers, and the dielectric substrate layer between the two metal copper clad layers; the upper metal copper clad layer There are radiation gaps vertically penetrating the upper metal copper clad layer on the layer, and the radiation gaps are arranged alternately on the left and right sides of the antenna centerline; metallized through holes are provided on the dielectric substrate layer, and the metallized through holes are symmetrical on both sides of the antenna centerline arrangement to form a substrate-integrated waveguide structure; the present invention is based on a three-dimensional meandering substrate-integrated waveguide, and the substrate-integrated waveguide is designed as a meandering shape to realize the wide-range scanning of the focal point of the near-field focusing leaky-wave antenna, and to overcome the focal The difficulty in scanning is reduced, and the performance of high-focus and wide-range contour scanning is obtained.

Description

technical field [0001] The invention belongs to the field of near-field focusing, and in particular relates to a millimeter-wave three-dimensional meandering substrate integrated waveguide near-field focusing scanning leaky-wave slot array antenna. Background technique [0002] With the wide application of near-field focusing antennas in the fields of microwave and millimeter wave imaging, wireless power transmission, access control and radio frequency identification, higher and higher requirements are put forward for its scanning range, scanning rate and performance. As a commonly used antenna, the leaky wave antenna has the characteristic of frequency scanning. The basic working principle of this type of antenna is to load a matching load on the antenna terminal, so that the device works in a traveling wave state, and adjust the position of the antenna unit to synthesize the required phase distribution to achieve the required pattern shaping. The substrate-integrated wave...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the requirements of the aperture phase distribution due to the special square law change of the near-field focusing in the design of the above-mentioned near-field focusing scanning leaky wave antenna and the characteristics of the rapid decline of the effective aperture during the scanning process, which makes the traditional planar design method unable to realize Due to the problem of large-scale scanning at heights such as the near-field focus, a three-dimensional meandering substrate-integrated waveguide leaky-wave slot array antenna structure is proposed based on a three-dimensional meandering substrate-integrated waveguide. By rationally designing the meandering shape of the antenna, the The vertical dimension realizes the aperture phase distribution required for near-field focusing, and at the same time, the meandering shape of the antenna is used to eliminate the influence of antenna scanning on the focus height, thereby solving the problem that traditional planar leaky wave antennas cannot achieve large-scale contour scanning

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