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An open sleeve antenna

A sleeve antenna, open technology, applied in the field of open sleeve antenna, can solve the problems of narrow bandwidth and inconvenient use of hand-held antennas, and achieve the effect of good antenna performance, wide bandwidth, and easy assembly and portability

Active Publication Date: 2018-10-19
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that existing hand-held antennas have problems of narrow bandwidth and inconvenient use, and an open sleeve antenna is provided

Method used

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  • An open sleeve antenna
  • An open sleeve antenna

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Embodiment Construction

[0020] An open sleeve antenna such as figure 1 and 2 As shown, it consists of antenna vibrator 1, insulating medium 2, metal sleeve 3, lumped parameter inductance 4, metal grounding box 5 and SMA connector 6.

[0021] The antenna vibrator 1 is a columnar metal rod. In a preferred example of the present invention, the antenna element 1 is made of copper metal. The antenna element 1 can be a standard cylindrical shape with the same upper and lower radii. However, in order to obtain a good match for the impedance of the antenna itself, in the preferred embodiment of the present invention, the antenna vibrator 1 is in the shape of a tapered stepped column, that is, along the axis direction of the antenna vibrator 1, the radius of the antenna vibrator 1 is segmented and gradually changed. Each segment has a different radius and length. The radius of the end of the antenna element 1 close to the metal ground box 5 is smaller than the radius of the end of the antenna element 1 aw...

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Abstract

The invention discloses an open sleeve antenna. An antenna oscillator is a columnar metal rod, wherein a metal sleeve is a tubular open sleeve which penetrates up and down; the metal sleeve surrounds the outer side of an antenna body; the central axis of the metal sleeve coincides with that of the antenna oscillator; an insulating medium fills the gap between the outer lateral wall of the antenna oscillator and the inner lateral wall of the metal sleeve; the insulating medium fixes the antenna oscillator and the metal sleeve together to form a sleeve antenna structure; and the sleeve antenna structure and an SMA joint are embedded into a metal grounding box. By the open sleeve, the open sleeve antenna adapts to the general dimension of a handheld antenna floor, and partially eliminates the influence on the standing-wave ratio of a low-frequency part of the antenna when utilizing a non-open sleeve; the capacitive reactance of an electronically small antenna is counteracted by loading a lumped-parameter inductor at a feeding port; and the stepped antenna oscillator, equivalent to top loading for overall impedance matching, achieves the characteristics of miniaturization, large bandwidth and the like.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to an open sleeve antenna. Background technique [0002] With the rapid development of the electronic industry, the performance and size requirements of the antenna for the communication system are constantly improving. The miniaturization of size has always been a hot spot in the development of antennas. Theoretically speaking, the smaller the size of the antenna, the higher its Q value, and the operating frequency bandwidth is largely limited. For the monopole antenna, it needs to be assembled with an additional flat-shaped floor before it can work. The antenna is perpendicular to the surface of the floor. The disadvantage of this antenna element is that it is inconvenient to use and has a narrow bandwidth. Although sleeve loading has an obvious effect on the expansion of antenna bandwidth, and sleeve-loaded broadband antennas are also widely used in modern communications, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/00H01Q1/50
CPCH01Q1/00H01Q1/50
Inventor 高喜乔玮唐世荣
Owner GUILIN UNIV OF ELECTRONIC TECH
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