Symmetrical periodic groove leaky-wave antenna based on artificial surface plasmon polaritons

Abstract

The invention relates to a symmetrical periodic groove leaky-wave antenna based on artificial surface plasmon polaritons, and relates to a leaky-wave antenna. A dielectric substrate is arranged; a metal structure covers the upper surface of the dielectric substrate; the metal structure comprises a trapezoidal coplanar waveguide transmission line feeding part, an artificial surface plasmon polariton gradual-change metal groove array part, a transition part and an artificial surface plasmon polariton periodic metal groove part; the trapezoidal coplanar waveguide transmission line feeding part ispositioned at one end of the dielectric substrate; the artificial surface plasmon polariton gradual-change metal groove array part is positioned in the middle of the dielectric substrate; the transition part is from the trapezoidal coplanar waveguide transmission line feeding part to the artificial surface plasmon polariton gradual-change metal groove array part; and the artificial surface plasmon polariton gradual-change metal groove array part is positioned at the tail end of the dielectric substrate. The working frequency band of the antenna is very wide; the corresponding working frequency band has relatively high gain and good directivity; and the symmetrical periodic groove leaky-wave antenna disclosed by the invention is simple in structure, simple and easy to manufacture, relatively small in size and good in performance, can be applied to actual working requirements, and has very important practical significance for application of the artificial surface plasmon polaritons in amicrowave frequency band.

Description

technical field [0001] The invention relates to a leaky wave antenna, in particular to a symmetrical periodic groove leaky wave antenna based on artificial surface plasmons fed by a coplanar waveguide. Background technique [0002] Surface Plasmon Polaritons (SPP) is a kind of electron density wave propagating along the metal-dielectric interface, which has the characteristics of high confinement and near-field enhancement, and has formed a new discipline in recent years. Due to their unique properties, SPPs have broad application prospects in the fields of negative refractive materials, super-resolution imaging, radar, and beam scanning. In order to apply SPP to microwave and millimeter wave frequency bands, artificial plasma materials can be constructed by slotting metal surfaces to realize adjustable, reconfigurable and intelligent circuits, devices or antennas based on SPP. [0003] At present, there are a variety of antennas based on artificial surface plasmons, such a...

AI Technical Summary

Problems solved by technology

Although surface plasmons have been used to achieve radiation, there are many problems such as high manufacturing process requirements, narrow operating bandwidth, and large size.

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