A dual-frequency circularly polarized antenna based on a substrate integrated waveguide

A substrate-integrated waveguide and circularly polarized antenna technology, used in remote sensing telemetry, antennas, and satellite communications, can solve problems such as unfavorable antenna transmission, dual-frequency circularly polarized impedance bandwidth, and narrow axial-ratio bandwidth, and improve impedance bandwidth. and the effect of axial ratio bandwidth

Active Publication Date: 2019-01-15
XIDIAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The antenna achieves circularly polarized radiation at two frequency points, but its disadvantage is that the antenna excites the resonance of two exponentially tapered slots on the surface of the circular resonator, and excites the required Dual-frequency circular polarization radiation, this way of achieving dual-frequency circular polarization leads to narrow impedance bandwidth and axial ratio bandwidth of dual-frequency circular polarization, the impedance bandwidth is 1.1% and 1.4% respectively, and the axial ratio bandwidth They are 1.1% and 1.5%, which are not conducive to the transmission of the antenna, and cannot be well applied to modern wireless communication networks. Therefore, there will be certain restrictions in practical applications

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  • A dual-frequency circularly polarized antenna based on a substrate integrated waveguide
  • A dual-frequency circularly polarized antenna based on a substrate integrated waveguide
  • A dual-frequency circularly polarized antenna based on a substrate integrated waveguide

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Embodiment 1

[0032] Embodiment 1. In this embodiment, the distance between the center point of the rectangular groove 9 and the midpoint of a pair of short sides of the third dielectric substrate 3 is s0 = 2 mm.

[0033] refer to figure 1 , a dual-frequency circularly polarized antenna based on a substrate-integrated waveguide, comprising a first dielectric substrate 1, and a stacked structure composed of a second dielectric substrate 2 and a third dielectric substrate 3 arranged up and down, the first dielectric substrate 1. Fixed above the laminated structure, the three dielectric substrates from top to bottom are rectangular plates with the same size and thickness of 0.8mm, 1.2mm and 0.575mm respectively. The length is 28mm and the width is 17mm. These dielectric substrates adopt dielectric constant Rogers 5880 material with a loss tangent of 2.2 and a loss tangent of 0.0009.

[0034] The upper surface of the third dielectric substrate 3 is printed with a first metal layer 8, and the l...

Embodiment 2

[0041] Embodiment 2, this embodiment has the same structure as Embodiment 1, only the following parameters have been adjusted:

[0042] The distance between the central point of the rectangular groove 9 and the midpoint of a pair of short sides of the third dielectric substrate 3 is s0 = 1.5 mm.

Embodiment 3

[0043] Embodiment 3, the structure of this embodiment is the same as that of Embodiment 1, only the following parameters have been adjusted:

[0044] The distance between the center point of the rectangular groove 9 and the line connecting the midpoints of a pair of short sides of the third dielectric substrate 3 is s0 = 2.5 mm.

[0045] Effect of the present invention can be further explained in conjunction with simulation result:

[0046] 1. Simulation content

[0047] 1.1 Utilize commercial simulation software HFSS_15.0 to simulate the reflection coefficient in the embodiment of the present invention 1, the result is as follows Figure 5 shown.

[0048] 1.2 Utilize the commercial simulation software HFSS_15.0 to carry out simulation calculation to the axial ratio in embodiment 1 of the present invention, the result is as follows Figure 6 shown.

[0049] 1.3 Utilize the commercial simulation software HFSS_15.0 to simulate the radiation pattern of the xoz plane in Embodi...

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Abstract

The invention provides a dual-frequency circularly polarized antenna based on a substrate integrated waveguide, which is used for solving the technical problems that the antenna impedance bandwidth and the axis ratio bandwidth are narrow in the prior art. Comprises a first dielectric plate, and a laminated structure composed of a second dielectric plate arranged vertically and a third dielectric plate, wherein the upper surface of the first dielectric plate is provided with a metal patch, and two rectangular patches on the upper surface of the second dielectric plate are provided with perturbation grooves; An upper surface and a low surface of that third dielectric plate are respectively provided with a first, second metal layer, A metal through-hole is connected through a plurality of metallized through-holes, A substrate integrate waveguide is composed of a first metal lay etched with a rectangular groove, two rectangular patches are coupled fed to generate circularly polarize waves,a pair of metal patches with tangential corners are printed on that upper surface of the first dielectric substrate, a metal probe is introduced to feed the metal patches, and the circularly polarized waves are generated in another frequency band to realize dual-frequency operation. It can be used in satellite communication, remote sensing and telemetry and other fields.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a dual-frequency circularly polarized antenna, in particular to a dual-frequency circularly polarized antenna based on a substrate integrated waveguide, which can be applied to the fields of satellite communication, remote sensing and telemetry, and the like. Background technique [0002] Antennas are an important part of wireless communication systems. With the rapid development of wireless communication, there is an urgent need for antennas with small size, low cost, wide frequency band, high gain and easy integration. [0003] The polarization of the antenna is divided into linear polarization, circular polarization and elliptical polarization. When the axial ratio of the ellipse is equal to 1, the elliptical polarized wave is the circular polarized wave. Circularly polarized antennas can receive linearly polarized waves in any polarization direction, and the signals it transm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q9/04
CPCH01Q1/38H01Q1/50H01Q9/045H01Q9/0457
Inventor 李文涛魏萌张昱东史小卫
Owner XIDIAN UNIV
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