K-waveband metamaterial coating microstrip antenna based on topological optimization and design method

Abstract

The invention discloses a K-waveband metamaterial coating microstrip antenna based on topological optimization and a design method. The microstrip antenna comprises an antenna substrate. The lower surface of the antenna substrate is provided with a metal grounding plate. A microstrip patch is arranged in the middle of the upper surface; a coaxial line feed probe is arranged on the microstrip patch; an antenna coating substrate is arranged above the antenna substrate in parallel. The antenna substrate and the antenna coating substrate are connected through a pillar. Wherein a plurality of metamaterial elements are etched on the antenna coating substrate, the metamaterial elements are of an array arrangement structure, each metamaterial element is dispersed into a square grid structure, each grid corresponds to one design element xi, and a set X of all the design elements xi forms a topological structure of the metamaterial elements. According to the invention, the problem of difficult matching of the metamaterial element and the microstrip antenna in the antenna design process is solved, and the antenna has the advantages of simple structure, convenient preparation and high gain.

Description

Technical field [0001] The invention relates to the technical field of communication antennas, in particular to a K-band metamaterial coated microstrip antenna based on topology optimization and a design method. Background technique [0002] Microstrip antennas are widely used due to their small size, simple structure, low cost, and easy conformal with other electromagnetic devices. However, traditional microstrip antennas have relatively low gain, narrow impedance bandwidth, and performance is greatly affected by the dielectric material. , The shortcomings of easy excitation of surface waves and energy loss restrict the further development and application of microstrip antennas. In order to improve the gain performance of the microstrip antenna, researchers have proposed improved methods such as using low-permittivity dielectric plates, adding parasitic patches and antenna arrays, but these methods have increased the antenna gain performance while increasing the size, complex st...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, propose a K-band metamaterial-coated microstrip antenna and design method based on topology optimization, solve the problem of difficult matching between metamaterial primitives and microstrip antennas in the antenna design process, It has the advantages of simple structure, convenient preparation and high gain

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