Small-sized broad band vertical depolarized omnidirectional antenna

Abstract

A small broadband vertical polarized all-round antenna includes four antenna units, a central feeding port, a base and four connecting cables, the antenna units are vertical to the base, the positive face is towards the outside arrayed in a 'mouth' shape and distributed symmetrically to the center, in which, the maximum diameter direction of each unit is parallel to the base, the four units are parallel to the central feeding port by four 0.25 wavelength cables to make all vertical polarized equivalent magnetic flow to distribute in a same phase on the antenna with the same structure. Each unit is made up of a ladder-type conductor with a medium plate radiating both sides of the slot positively, a feeding port, a medium plate and two earth units.

Description

technical field [0001] The invention relates to an antenna used in the technical field of communication, in particular to a small broadband vertically polarized omnidirectional antenna. Background technique [0002] At present, wireless communication represented by mobile communication is developing rapidly. With the improvement of communication capacity, quality, content and other requirements and the development of integrated circuit technology, people pay more and more attention to multimedia digital communication methods. At the same time, mobile reception has become one of the main communication methods because it can greatly meet the needs of users. Therefore, higher and higher requirements are placed on the receiving antenna. For example, after the broadcast of digital TV, buses and various cars will be one of the main users. Most of the early vertically polarized antennas used dipoles or monopoles (such as whip antennas), but the height of this antenna was half-wav...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies and defects in the prior art, and provide a small-sized broadband vertically polarized omnidirectional antenna, which solves the problem of the widespread use of rod-type antennas in digital TV, which has low gain and takes up a large space. The antenna array with a large volume is inconvenient to install, not beautiful, and even affects the safety of the mobile carrier. The invention is used to transmit and receive vertically polarized electromagnetic waves. It has a simple structure, small size, wide frequency band, and the radiation field Evenly distributed within 360 degrees of the horizontal plane, it can also be used for wireless communication

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