An Antenna for Generating Radially Propagating RF OAM Beams Based on a Ring Traveling Wave Antenna

Abstract

The invention discloses an antenna for generating radially propagating radio frequency OAM beams based on a circular traveling wave antenna. The overall structure of the present invention is a metal annular cavity with a ring gap on the side. The metal annular cavity is formed by bending a rectangular waveguide. The width of the metal annular cavity is the wide side of the rectangular waveguide, and the height of the side is the narrow side of the rectangular waveguide. The seam is set in the middle of the narrow side, the perimeter of the metal ring cavity is the longitudinal length of the rectangular waveguide, and the side wall of the metal ring cavity is provided with a ring horn, which is composed of two parts that are symmetrical up and down, and when combined, the ring horn There is a suture at the bottom of the horn, and the gap corresponds to the ring gap in the middle of the narrow side of the annular metal cavity. Combining the rectangular waveguide resonant cavity and the annular traveling wave antenna structure, the invention designs an antenna structure capable of generating radio frequency orbital angular momentum beams capable of radial transmission. The invention can increase the channel capacity of the direct channel, increase the transmission distance, thereby improving the transmission efficiency of the communication system.

Description

technical field [0001] The invention belongs to the field of OAM wireless communication, and relates to an antenna for generating radially propagating radio frequency OAM beams based on an annular traveling wave antenna. Background technique [0002] The popularization of mobile Internet has made the wireless communication spectrum resources extremely tight, and there are a lot of gaps. The contradiction between the large-capacity requirements of mobile communication systems and the limited spectrum resources has become increasingly prominent. The spectrum resources of electromagnetic waves are very limited, and it is difficult to meet the new needs of wireless communication only by dividing new spectrums. However, capacity resources based on the conventional parameters of electromagnetic waves such as frequency spectrum, phase, and amplitude have been fully developed and utilized. Although the gradual expansion in these dimensions can continue, there is not enough room to ...

AI Technical Summary

Problems solved by technology

The diameter of the radio frequency orbital angular momentum beam becomes significantly larger as the propagation distance increases, and there is a phase singularity in the center of the beam, which will cause difficulty in reception at the receiving end

Both of these situations are not conducive to the multiplexing and long-distance propagation of orbital angular momentum beams

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