High-gain broadband omnidirectional antenna

Abstract

The invention belongs to the technical field of design for antennas, and relates to a high-gain broadband omnidirectional antenna. The high-gain broadband omnidirectional antenna comprises a half-wave dipole antenna, a reflector plate, a matching platform and a coaxial cable. The matching platform is in the shape of a circular truncated cone with lower end face open and inside hollow, and a circular hole is arranged on the upper end face of the matching platform. The half-wave dipole antenna is cylindrical, the lower half portion of the half-wave dipole antenna is disposed in the circular hole of the matching platform, and the upper half portion of the half-wave dipole antenna exposes from the upper end face of the circular hole. The circular reflector is arranged above the half-wave dipole antenna, the diameter of the reflector plate is equal to that of the lower end face of the matching platform, the reflector plate and the matching platform are concentric and arranged at positions corresponding to each other up and down. The coaxial cable is arranged below the half-wave dipole antenna, and the coaxial cable is connected with the half-wave dipole antenna to form a feed port. The high-gain broadband omnidirectional antenna solves technical problems that existing omnidirectional antennas are incapable of meeting requirements of indexes such as frequency bands, feed network, out-of-roundness of directional diagrams, wave beam direction and gain performance, and has the advantages wide frequency band, simple feed network, low out-of-roundness of directional diagrams, stable wave beam direction and high gain.

Description

technical field [0001] The invention belongs to the technical field of antenna design and relates to a high-gain broadband omnidirectional antenna. Background technique [0002] In the field of communication, mobile base stations, shipborne weapons and other fields, omnidirectional antennas have been increasingly widely used. [0003] The more classic antenna half-wave dipole antenna has the advantages of wide frequency band, simple feed network, small out-of-roundness of pattern, and stable beam pointing. The disadvantage is that the gain is small. [0004] In order to improve the antenna gain, it is generally realized by forming arrays in series or in parallel. The advantage of the parallel array antenna method is that the beam pointing is stable; the disadvantage is that the pattern is out of round and the feed network is complex. The advantages of the antenna method in series array are: the pattern has a small out-of-roundness (about 1 to 2 decibels), and the feed netw...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing omnidirectional antenna cannot meet the performance requirements of wide frequency band, simple feeding network, small out-of-roundness of pattern, stable beam pointing and high gain at the same time

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