A Low Profile Shared Aperture Dual Circularly Polarized Orbital Angular Momentum State Multiplexing Antenna
An orbital angular momentum, dual circular polarization technology, applied in the electromagnetic field, to alleviate the shortage of spectrum resources, realize multiplexing, and simplify the feeding network
Active Publication Date: 2021-09-17
BEIJING UNIV OF POSTS & TELECOMM
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At present, it is difficult for these two types of antennas to generate more than two orthogonal vortex electromagnetic waves
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[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0053] The present invention is based on the eigenmode theory of a low-profile shared aperture dual circularly polarized orbital angular momentum state multiplexing antenna, and its structure is as follows figure 1 As shown, from top to bottom are: regular octagonal metal patch, first dielectric board, metal floor, second dielectric board and feeder network.
[0054] The metal patch of the regular octagon is etched with a slit, and the regular octagon is divid...
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The invention discloses a low-profile shared-aperture dual-circular polarization orbital angular momentum state multiplexing antenna, which belongs to the field of electromagnetism, and specifically comprises: a regular octagonal metal patch, two dielectric plates, a metal floor and a feed network. The regular octagonal metal patch is etched with slits, and is connected to the feed network through four metallized via holes in the two dielectric boards; two metallized via holes are also opened on the first dielectric board to form a short-circuit column. The feed network includes two 3dB directional couplers, one end and two ports of each coupler are respectively used as the input ends of the radio frequency signal, and the coupler is distributed into two radio frequency signals with equal amplitude and a phase difference of 90 degrees. The via hole reaches a specific area of the regular octagon to form two currents with orthogonal oscillation directions and a phase difference of 90 degrees, thereby generating different circularly polarized electromagnetic waves and radiating outward. The present invention greatly improves the communication capacity without occupying additional frequency spectrum resources.
Description
technical field [0001] The invention belongs to the field of electromagnetics, relates to microwave radio frequency technology, in particular to a low profile shared aperture dual circular polarization orbital angular momentum multiplexing antenna. Background technique [0002] With the rise of the Internet and the popularity of smart terminals, people have higher and higher requirements for the transmission rate and throughput of wireless communication systems. Only by continuously dividing new spectrum and using more spectrum bandwidth to achieve high speed wireless communication. However, the spectrum resources in nature are very limited, which cannot meet people's increasing demand for wireless communication. In order to greatly increase the communication capacity within the limited spectrum resources, the "state division multiplexing" communication technology based on the orbital angular momentum of electromagnetic waves came into being. [0003] Electromagnetic waves...
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IPC IPC(8): H01Q25/04H01Q9/04H01Q13/10
Inventor 邓力何晓媛
Owner BEIJING UNIV OF POSTS & TELECOMM