Fabry-Perot resonant cavity broadband high-gain microstrip antenna based on single-layer double-sided coating structure

Abstract

The invention discloses a Fabry-Perot resonant cavity broadband high-gain microstrip antenna based on a single-layer double-sided coating structure, and belongs to the field of antenna wireless communication. The antenna comprises a bottom metal grounding plate, an antenna dielectric bottom plate, a U-shaped slot antenna radiation patch and an upper-layer single-layer double-sided frequency selective surface. The metal grounding plate, the antenna dielectric bottom plate and the U-shaped slot antenna radiation patch are seamlessly stacked, and the single-layer double-sided frequency selectivesurface is composed of a single-layer coated dielectric substrate, a square annular aperture structure and a cross grid structure. A U-shaped slot is etched on the metal patch of a traditional microstrip antenna, so that the bandwidth of the antenna structure is improved, the main radiation direction of the antenna is ensured to be right above the antenna structure, thereby meeting the design requirements of a Fabry-Perot resonant cavity antenna. Based on the above, the single-layer double-sided frequency selection surface model with positive phase gradient is designed, and the gain bandwidthof the Fabry-Perot resonant cavity antenna is increased. The method is simple in design, is easy to understand, is wide in application range, is high in portability and is suitable for the characteristics of high gain and broadband of the Fabry-Perot resonant cavity antenna.

Description

technical field [0001] The invention belongs to the field of wireless communication of antennas, in particular to a Fabry-Perot resonant cavity broadband high-gain microstrip antenna based on a single-layer double-sided cladding structure. Background technique [0002] The development of wireless communication has changed people's lives. As a component for receiving and transmitting electromagnetic waves, antennas receive more and more attention, and the performance of antennas is particularly critical to the entire wireless communication system. In long-distance communication, the gain of the antenna needs to be high enough to ensure that the terminal of the system equipment can work normally. There are many research directions and design methods for the improvement of antenna gain. The Fabry-Perot resonator antenna has obvious advantages in high efficiency, high gain, simple structure, low profile, and no complex feed network, which has attracted the attention of research...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to overcome the problem that the gain bandwidth of existing Fabry-Perot resonant cavity antenna is narrower, provide a kind of single-layer double-sided frequency selective surface with positive phase gradient, use this structure to design based on single-layer double-sided covering Layer-structured Fabry-Perot resonant cavity broadband high-gain microstrip antenna

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