Directional diagram reconfigurable wind-angle scanning antenna based on SSPP structure

Abstract

The invention provides a directional diagram reconfigurable wind-angle scanning antenna based on a SSPP structure. The antenna comprises a coplanar waveguide structure formed by two quasi-trapezoidalmetal sheets and a segment of elongated metal lead together, symmetrical zigzag SSPP metal transmission lines, a feed selection structure formed by two paths of metal lines on which three switches arewelded, a quadrilateral metal modulation unit, an end gradient zigzag structure and an SMA connector. The SMA connector is arranged on the center of the short side of the antenna dielectric plate andused for performing radio frequency excitation for the antenna. The SMA connector is welded on one side of the coplanar waveguide structure, and one side of the coplanar waveguide structure is accessed to the feed selection structure. The feed selection structure is controlled by three changeover switches and used for selecting the current line feeding in the symmetrical zigzag SSPP metal transmission lines from the coplanar waveguide structure. The quadrilateral metal is arranged on the symmetrical zigzag SSPP metal transmission lines. The end gradient zigzag structure is used for improvingthe bandwidth and the end-fire capacity of the antenna. The problem that the present frequency scanning antenna has difficulty to realize wide-angle scanning can be solved.

Description

technical field [0001] The present invention relates to an antenna, in particular to a low-profile ultra-wide-angle scanning antenna based on an artificial surface plasmon polariton (Spoof Surface Plasmon Polariton, SSPP for short) structure. Background technique [0002] The importance of antennas in social life is growing day by day. The scanning antenna can switch the beam pointing to realize the tracking of the target. Because the frequency scanning antenna has different beam directions at different frequencies, it is widely used in radar, point-to-point communication, and satellite communication. However, the beam coverage of most frequency scanning antennas is limited, and it is impossible to achieve large-angle beam coverage. How to realize wide-angle scanning or even ultra-wide-angle scanning is a problem that researchers need to solve. [0003] The frequency scanning antenna proposed in the prior art realizes a scanning range of about 20°, but the antenna has a c...

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Problems solved by technology

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide a wide-angle scanning antenna based on the reconfigurable pattern of the SSPP structure, which solves the problem that the pattern of the existing frequency-sweeping antenna is difficult to cover an ultra-wide angle

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