A metamaterial antenna

Abstract

The invention relates to a metamaterial antenna. The metamaterial antenna comprises a waveguide, a first metamaterial panel tightly adhered to the waveguide and used for diverging electromagnetic waves transmitted by the waveguide, and a second metamaterial panel provided with an electromagnetic wave converging function and used for converting electromagnetic waves diverged by the first metamaterial panel into plane waves. The metamaterial antenna only needs the waveguide, does not need a horn mouth, and the divergence of the electromagnetic waves radiated out of the waveguide without limitation of the horn mouth is strong. The first metamaterial panel arranged on the waveguide enables the electromagnetic waves to be diverged, a close distance radiation range of the waveguide is widened, and the overall size of the antenna is decreased. In addition, antenna near-field energy can be adjusted according to the distribution demand of an antenna field. The electromagnetic waves transmitted by the waveguide are converted into the plane waves by designing a second metamaterial panel core layer, a second metamaterial panel gradual change layer and refractive index changes of the core layer and the gradual change layer, accordingly the converging performance of the antenna is improved, the reflection loss is reduced, and a transmission distance is prolonged.

Description

Technical field [0001] The present invention relates to the field of antennas, and more specifically, to a metamaterial antenna without a bell mouth. Background technique [0002] A horn antenna refers to an antenna whose waveguide terminal is expanded into a horn shape, and its name is derived from its shape. The horn antenna has a simple structure and easy control of the directional pattern, and can be used as a directional antenna or as a feed source. The radiation angle of the horn antenna is determined by the size of the horn. When the radiation angle needs to be enlarged, the size of the horn needs to be enlarged accordingly. In the prior art, without increasing the size of the horn, the method of expanding the radiation angle is generally to add a concave lens at the front end of the horn antenna. Due to the divergence effect of the concave lens, the radiated electromagnetic waves are diverged to expand the radiation angle. Because the curved surface of the concave lens ...

AI Technical Summary

Problems solved by technology

However, the convex lens still needs to manufacture a curved surface with uneven thickness to achieve the desired effect, and the thickness of the convex lens is relatively thick, which is not conducive to the trend of miniaturization of existing equipment

Moreover, the horn mouth of the current horn antenna limits the radiation range of electromagnetic waves to a certain extent, and also affects the size of the antenna.

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