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Omnidirectional antenna and omnidirectional antenna array

An omnidirectional antenna and array technology, applied in the field of omnidirectional antennas and omnidirectional antenna arrays, can solve the problem of small antenna gain bandwidth, and achieve the effects of improving market competitiveness, small Q value, and reducing out-of-roundness

Active Publication Date: 2015-10-07
36TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an omnidirectional antenna and an omnidirectional antenna array to solve the problem that the existing antenna gain or bandwidth is not large and cannot meet the actual needs

Method used

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  • Omnidirectional antenna and omnidirectional antenna array

Examples

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Embodiment 1

[0042] figure 1 is a schematic diagram of a surface of a dielectric substrate of an omnidirectional antenna according to an embodiment of the present invention, see figure 1 , the omnidirectional antenna in this embodiment of the present invention includes: a dielectric substrate 11 and a first omnidirectional radiation unit;

[0043] The first omnidirectional radiation unit includes: a main dipole, a parasitic dipole 15 and a metal base plate 12;

[0044] The main dipole includes: a first metal sheet 13 printed on a surface of the dielectric substrate 11 and a second metal sheet 14 perpendicular to the dielectric substrate 11 and inserted into the first metal sheet 13;

[0045] The first metal sheet 13, the parasitic dipole 15 and the metal base plate 12 are printed on one surface of the dielectric substrate 11, the first metal sheet 13 is printed in front of the metal base plate 12, and the parasitic dipole 15 is printed on the first metal sheet 13 ahead. The front here i...

Embodiment 2

[0048] figure 2 is a schematic diagram of a surface of a dielectric substrate of an omnidirectional antenna according to another embodiment of the present invention, see figure 2, the omnidirectional antenna of the present invention also includes: a second omnidirectional radiation unit, the second omnidirectional radiation unit has the same structure as the first omnidirectional radiation unit, and the metal base plate of the second omnidirectional radiation unit is the same as the first omnidirectional radiation unit. The metal base plates of the radiating elements are connected together. That is, the second omnidirectional radiation unit also includes a metal base plate 22, a first metal sheet 23, a second metal sheet 24, and a parasitic dipole 25. The first metal sheet 23 and the second metal sheet 24 form the main dipole of the three-dimensional structure. The first metal sheet 23 is printed in front of the metal base plate 22 , and the parasitic dipole 25 is printed i...

Embodiment 3

[0068] Figure 5 is a schematic diagram of an omnidirectional antenna array according to an embodiment of the present invention, see Figure 5 , the omnidirectional antenna array of the present invention includes: three omnidirectional antennas according to one aspect of the present invention;

[0069] The three omnidirectional antennas 51 form an antenna array on the vertical plane, and the included angle between two dielectric substrates of the three omnidirectional antennas 51 is 120°.

[0070]In specific applications, higher gain can be obtained by using the three omnidirectional antennas in the second embodiment to form an omnidirectional antenna array. When three omnidirectional antennas are formed in an array, the three omnidirectional antennas are rotated by 120 degrees in sequence. In the entire frequency band (1.65GHz–2.76GHz), the out-of-roundness of the horizontal plane pattern will be within 1dB. And in the case of ignoring the loss of the feeder cable and the p...

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Abstract

The invention discloses an omnidirectional antenna and an omnidirectional antenna array. The omnidirectional antenna comprises a dielectric substrate and a first omnidirectional radiation unit, wherein the first omnidirectional radiation unit comprises a main dipole, a parasitic dipole and a metal bottom plate; the main dipole comprises a first metal sheet printed on one surface of the dielectric substrate and a second metal sheet vertical to the dielectric substrate and inserted in the first metal sheet; the first metal sheet, the parasitic dipole and the metal bottom plate are printed on one surface of the dielectric substrate; the first metal sheet is printed in front of the metal bottom plate; and the parasitic dipole is printed in front of the first metal sheet. According to the omnidirectional antenna of the invention, through arranging the parasitic dipole, the bandwidth of the antenna is expanded, and non-circularity of the antenna is reduced; and in addition, by adopting the main dipole in a three-dimensional structure, a larger bandwidth can be provided.

Description

technical field [0001] The present invention relates to the technical field of communication antennas, in particular to an omnidirectional antenna and an omnidirectional antenna array. Background technique [0002] Omnidirectional antenna refers to a type of antenna that can achieve 360° uniform radiation in the horizontal plane. Such antennas are widely used as base station antennas in mobile communications. For example, in suburban and rural areas where the density of mobile users is low, omnidirectional antennas can be used to achieve wide coverage. In addition, in the security and military fields, omnidirectional antennas are also widely used for signal detection and interference. [0003] With the rapid development of mobile communication technology, the current situation of coexistence of various systems requires the bandwidth of the base station antenna to be as wide as possible and to cover more frequency bands. For example, the GSM 1800 and GSM 1900 frequency band...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50
Inventor 俞钰峰王忍王玉峰
Owner 36TH RES INST OF CETC
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