Electrically-controlled zero-crossing scanning planar leaky-wave antenna based on metamaterial

Abstract

The invention relates to an electrically-controlled zero-crossing scanning planar leaky-wave antenna based on a metamaterial, which belongs to the technical field of microwave antenna engineering, andcomprises bottom copper foil, a dielectric plate and a periodic leaky-wave structure. The bottom-layer copper foil is of a horizontally-placed rectangular sheet structure; the dielectric plate is horizontally and fixedly mounted on the upper surface of the bottom-layer copper foil; the periodic leaky-wave structure is horizontally mounted on the upper surface of the dielectric plate; the periodicleaky-wave structure is a hollow structure; 2n+1 metallized through holes are formed in the dielectric plate; the periodic leaky-wave structure comprises two isolation patches, n leaky-wave units, 3n+2 vertical feed lines and two horizontal feed lines. The leaky-wave antenna solves the two problems that a traditional leaky-wave antenna can only conduct frequency scanning, cannot conduct fixed-frequency scanning and can only conduct forward radiation in the wave propagation direction, and has the advantages of being high in radiation efficiency, simple in structure, convenient to machine, lowin price and the like.

Description

technical field [0001] The invention belongs to the technical field of microwave antenna engineering, and relates to an electronically controlled zero-crossing scanning planar leaky-wave antenna based on metamaterials. Background technique [0002] The leaky wave antenna was first proposed by W.W.Hansen in the 1940s. Because of its excellent beam scanning characteristics, it has always been a hot spot in the field of antenna research. The original leaky wave antenna is to open a long slot on the rectangular waveguide, and its essence is the phenomenon that part of the electromagnetic wave is radiated to the space when the electromagnetic wave propagating on the waveguide structure is a fast wave. In recent years, research on leaky-wave antennas has developed rapidly, especially planar leaky-wave antennas have been widely studied, because planar leaky-wave antennas can be directly processed on printed circuit boards (PCBs), with low profile, easy processing, and simple struct...

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Problems solved by technology

[0014] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, and propose an electronically controlled zero-crossing scanning planar leaky-wave antenna based on metamaterials, which solves the problem that the traditional leaky-wave antenna can only scan in frequency but cannot scan in fixed frequency and can only There are two problems of forward radiation along the wave propagation direction, and it also has the advantages of high radiation efficiency, simple structure, easy processing and low price.

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