Broadband circularly-polarized omnidirectional antenna based on rectangular rings

Abstract

The invention discloses a broadband circularly-polarized omnidirectional antenna based on rectangular rings. The antenna comprises an antenna radiation part, a flexible dielectric slab, a broadband feed network, a feed substrate and a metal reflection post, wherein the antenna radiation part comprises the four broadband rectangular rings; each rectangular ring consists of a primary radiation ring and a parasitic ring; gaps are formed on the rings; the flexible dielectric slab is bent into a hollow cylinder; the four broadband rectangular rings are equationally, uniformly and circularly arrayed on the flexible dielectric slab; the metal reflection post is placed on a central axis of the hollow dielectric cylinder; and the broadband feed network is printed on the front surface and the back surface of the feed substrate, and horizontally placed in the center of the hollow dielectric cylinder to achieve constant-amplitude and same-phase feed to the four broadband rectangular rings. The antenna has the advantages that the antenna can flexibly achieve left and right circular polarization, and is good in omnidirectional property and broadband. The antenna is applicable to the field of mobile communication base stations.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a rectangular ring-based broadband circularly polarized omnidirectional antenna. Background technique [0002] In the antenna system, any incoming wave with any polarization can be received by the circularly polarized antenna, and the circularly polarized wave radiated by the circularly polarized antenna can also be received by any polarized antenna. Therefore, the signal strength received by the circularly polarized antenna It is not affected by the relative orientation of the transmitting and receiving antennas. And because the polarization direction of circularly polarized reflected waves is opposite to that of incident waves, using circularly polarized antennas in multipath environments can reduce multipath signal interference, making it widely used in satellite communications, space detection, and ground In systems such as mobile communication, broadcast television and...

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Problems solved by technology

[0003] Circularly polarized omnidirectional antennas are widely required in space vehicles (such as aircraft, rockets, missiles, etc.), remote sensing and telemetry, and wireless communication systems to maintain communication with targets in different directions, but it is difficult to achieve broadband is a classic problem of circularly polarized antennas , hindering the widespread application of circularly polarized omnidirectional antennas

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