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Broadband circularly polarized electromagnetic dipole antenna

An electromagnetic dipole, circularly polarized technology, used in antennas, resonant antennas, antenna grounding devices, etc., can solve the problems of narrow impedance bandwidth and axial ratio bandwidth, low gain, etc., to overcome the narrow impedance bandwidth and axial ratio bandwidth. , the effect of increasing the gain, widening the impedance bandwidth and the axial ratio bandwidth

Inactive Publication Date: 2019-10-15
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the profile of the invention is low, its impedance bandwidth and axial ratio bandwidth are narrow, and the gain is low

Method used

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  • Broadband circularly polarized electromagnetic dipole antenna
  • Broadband circularly polarized electromagnetic dipole antenna
  • Broadband circularly polarized electromagnetic dipole antenna

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] refer to figure 1 , a broadband circularly polarized electromagnetic dipole antenna, comprising a metal floor 1, an electromagnetic dipole 2, a feeding structure 3, an L-shaped metal plate 4 and four L-shaped parasitic branches 5.

[0026] The metal floor 1 adopts a rectangular structure, and L-shaped metal plates 4 are respectively fixed on the side edges where a pair of opposite corners are located, forming a metal back cavity with the metal floor 1. When the main body of the antenna radiates, due to electromagnetic coupling, the metal back The cavity is excited, which is equivalent to the second radiator, so a new impedance resonance frequency point and axial ratio resonance frequency point are introduced at high frequencies, effectively widening the impedance bandwidth and axial ratio bandwidth of the antenna at high frequencies, and at the same time The gain of the antenna can be increased. The L-shaped metal plate 4 is composed of a third rectangular metal plate ...

Embodiment 2

[0030] Embodiment 2, this embodiment has the same structure as Embodiment 1, only the following parameters have been adjusted:

[0031] The size of the third rectangular metal plate 41 in the present invention is GL1×GW1, the value of GL1 is 180mm, the value of GW1 is 130mm, the size of the fourth rectangular metal plate 42 is GH1×GW1, and the value of GH1 is 29mm, The value of GW1 is 130mm; the length of the triangular cut corner included in the second rectangular metal plate 22 is Chamfer, and the value of Chamfer is 10.5mm, the size of the rectangular cut corner included in the second rectangular metal plate 22 is SL×SW, and the value of SL is 39mm, SW is 5mm; the size of the fifth rectangular metal plate 51 is PH×PW, the value of PH is 18mm, the value of PW is 9mm, the size of the sixth rectangular metal plate 52 is PL×PW, and PL is The value is 20mm, and the value of PW is 9mm.

Embodiment 3

[0033] Embodiment 3, the structure of this embodiment is the same as that of Embodiment 1, only the following parameters have been adjusted:

[0034] The size of the third rectangular metal plate 41 in the present invention is GL1×GW1, the value of GL1 is 190mm, the value of GW1 is 140mm, the size of the fourth rectangular metal plate 42 is GH1×GW1, and the value of GH1 is 30mm, The value of GW1 is 140mm; the length of the triangular cut corner included in the second rectangular metal plate 22 is Chamfer, and the value of Chamfer is 11.5mm. The size of the rectangular cut corner included in the second rectangular metal plate 22 is SL×SW, and the value of SL is 41mm, the value of SW is 6mm; the size of the fifth rectangular metal plate 51 is PH×PW, the value of PH is 19mm, the value of PW is 11mm, the size of the sixth rectangular metal plate 52 is PL×PW, and PL is The value is 21mm, and the value of PW is 11mm;

[0035] Below in conjunction with imitation experiment, technica...

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Abstract

The invention provides a broadband circularly polarized electromagnetic dipole antenna, which comprises a metal floor, an electromagnetic dipole, a feed structure, an L-shaped metal plate and four L-shaped parasitic branches. The metal floor is of a rectangular structure. The electromagnetic dipole comprises two dipole arms rotationally symmetrical about the central normal of the metal floor. Eachdipole arm is composed of a first rectangular metal plate vertically fixed to the metal floor and a second rectangular metal plate vertically connected with the first rectangular metal plate. The feed structure is a Gamma-shaped structure, is fixed at the center of the surface of the metal floor, is located between the two dipole arms and is used for feeding the two dipole arms in a coupled way.The technical problems of narrow impedance bandwidth and axial ratio bandwidth and low gain of the existing electromagnetic dipole antenna are solved. The broadband circularly polarized electromagnetic dipole antenna can be used in wireless communication systems such as a mobile base station and an indoor distribution system.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a broadband circularly polarized electromagnetic dipole antenna, which can be used in wireless communication systems such as mobile base stations and indoor distribution systems. Background technique [0002] With the rapid development of wireless communication technology, the requirements for antennas of wireless communication systems are also constantly improving. In order to accommodate the original frequency bands and increasing frequency bands at the same time, such as PCS, LTE, WLAN, Sub 6G, etc., the antenna should have more Wide working frequency band. According to the polarization characteristics, antennas can be divided into three types: linear polarization, circular polarization and elliptical polarization. The bandwidth refers to the main performance parameters of the antenna in the frequency range that can meet the design index requirements, such as inpu...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/48H01Q1/50H01Q5/10H01Q5/307H01Q5/314H01Q5/385H01Q9/16
CPCH01Q1/36H01Q1/48H01Q1/50H01Q5/10H01Q5/307H01Q5/314H01Q5/385H01Q9/16
Inventor 翁子彬张炫张立焦永昌孙士捷
Owner XIDIAN UNIV
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