Dual-mode vortex wave beam dual-circular polarization four-element array antenna having concise structure

Abstract

The invention provides a dual-mode vortex wave beam dual-circular polarization four-element array antenna having a concise structure. By adopting a circular polarization unit continuous rotating technology, a phase difference required by generating of vortex wave beams is acquired, and by adopting array element equiamplitude in-phase feeding, a feeding network structure is simplified to a great extent. The array antenna comprises four parasitic units, an upper layer dielectric substrate, four excitation units, a middle layer dielectric substrate, a metal layer floor, a lower layer dielectric substrate, and a feeding network. The parasitic units and the excitation units are disposed on the upper surface of the upper layer dielectric substrate and the upper surface of the middle layer dielectric substrate. An air layer is used to separate the upper layer dielectric substrate and the middle layer dielectric substrate. The feeding network is disposed on the lower surface of the lower layer dielectric substrate, and the feeding network is connected with the excitation units by adopting a metal probe penetrating the floor. A left circular polarization wave having a vortex mode of 1=+1 and a right circular polarization wave having the vortex mode of 1=-1 are generated, and at the same time, a good circular polarization radiation characteristic is provided, and in addition, the antenna has advantages of concise structure, small size, low profile, light weight, and easy conformality.

Description

technical field [0001] The invention relates to the field of antennas capable of generating vortex electromagnetic waves, in particular to a dual-mode vortex beam dual-circularly polarized four-element array antenna with simple structure. Background technique [0002] The carrier of wireless communication is mainly electromagnetic waves in microwave or millimeter wave frequency bands. In practice, spherical waves and plane waves are most used. Traditional research has been focusing on technologies such as dense coding and channel multiplexing, such as time division multiplexing (TDM) and code division multiplexing (CDM) proposed in 2G, space division multiplexing (SDM) was added in the 3G era, and 4G Orthogonal Frequency Division Multiplexing (OFDM) and MIMO technologies are adopted. However, the research on the electromagnetic wave itself as an information carrier is ignored. The use of these technologies has improved the spectrum utilization rate to a certain extent. How...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing antennas that generate vortex electromagnetic waves generate fewer vortex patterns and the antenna structures are relatively complicated. High Vortex Mode Purity

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