Broadband high-gain metal lens antenna based on four-ridge waveguide

Abstract

The invention discloses a broadband high-gain metal lens antenna based on four-ridge waveguide. The antenna comprises a lens formed by a plurality of lens units and a feed source horn positioned on a focal plane of the lens, and each lens unit consists of a square waveguide and four ridges positioned in the centers of four walls of the square waveguide. The problem that a traditional lens antenna is difficult to realize wide gain bandwidth and high aperture efficiency at the same time is solved; the antenna disclosed by the invention is high in gain and wide in working gain bandwidth, and can meet the requirement of millimeter wave long-distance communication; and according to the antenna, far-field high-gain radiation is achieved, meanwhile, dual-polarization scanning is achieved in two dimensions, and the antenna is suitable for the application scene of millimeter wave multi-beam scanning.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a wide-band high-gain metal lens antenna based on a four-ridge waveguide. Background technique [0002] With the rapid development of mobile communication technology, the requirements of various systems for antennas are also increasing. On the one hand, due to the continuous improvement of the working frequency band of the antenna, its transmission loss has increased compared with the traditional low-frequency antenna. Therefore, in this case, a high-gain antenna with high directivity and long-distance transmission characteristics must be used. On the other hand, modern antennas need to cover a larger spatial range to meet multi-beam application scenarios, so beam scanning antennas have also attracted much attention. High-gain beam scanning antennas are widely used in millimeter-wave communication fields such as satellite communication, radar detection, and space communication....

AI Technical Summary

Problems solved by technology

Due to the insertion loss and high Q value introduced by the addition of lumped elements, this type of lens antenna has the disadvantage of low efficiency for narrow bandwidth apertures

Metasurface lenses use new artificial materials to achieve phase regulation, but their structures are often complex and the design is cumbersome. Like multilayer frequency selective surface lenses, they have the disadvantages of narrow bandwidth and ohmic loss and dielectric loss.

Through the review and analysis of the existing technology, the current lens antenna is difficult to achieve wide bandwidth, high efficiency, and high gain at the same time

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