Circularly polarized medium reflector unit and reflectarray antenna based on 3D printing technology

A reflection unit, 3D printing technology, applied in antennas, antenna arrays, specific array feeding systems, etc., can solve the problem of not being able to realize circular polarization characteristics and processing of dielectric reflection array antennas at the same time, and achieve suppression of multipath effects, High precision and excellent performance

Active Publication Date: 2021-02-12
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the circular polarization characteristics and processing of the dielectric reflectarray antenna cannot be realized at the same time.

Method used

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  • Circularly polarized medium reflector unit and reflectarray antenna based on 3D printing technology
  • Circularly polarized medium reflector unit and reflectarray antenna based on 3D printing technology
  • Circularly polarized medium reflector unit and reflectarray antenna based on 3D printing technology

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Experimental program
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Effect test

Embodiment 1

[0026] In recent years, with the rapid development of mobile communication technology, both radar and communication systems expect antennas to have more functionality and adaptability. The microstrip reflectarray antenna has some advantages of the reflector antenna and the large phased array antenna, and has been widely used and continuously improved. However, the traditional microstrip reflectarray antenna has a small phase range, narrow gain bandwidth, complex structure, and limited application range; the dielectric reflectarray antenna has a large phase range, simple structure, and easy processing. Circularly polarized antennas can suppress multipath effects, so circularly polarized dielectric reflectarray antennas have received great attention. However, the dielectric reflectarray antenna using low dielectric constant materials cannot achieve circular polarization, and the dielectric reflectarray antenna using high dielectric constant materials cannot be processed.

[002...

Embodiment 2

[0031] The overall composition and specific structure of the circularly polarized medium reflective unit based on 3D printing technology are the same as in Embodiment 1, see figure 2, the side length a of the dielectric block 1 is selected between 4.5mm~5mm, the side length b is also selected between 4.5mm~5mm and the side length c is selected between 5.8mm~6.8mm, in the present invention a =b. The reflective unit 6 is set at a period of 12 mm to 20 mm. see image 3 , the height h of the dielectric block 1 of the present invention changes from 5.5mm to 23mm, and the reflection phase of the dielectric reflection unit 6 changes from -123° to -486° accordingly. In the present invention, there is a one-to-one correspondence between the height of the dielectric block 1 and the reflection phase. In this embodiment, a=b=5mm, c=5.8mm, and the reflection unit 6 period is set to 12mm, which is mostly used in situations where the antenna aperture efficiency is required to be high.

...

Embodiment 3

[0034] The overall composition and specific structure of the circularly polarized medium reflection unit based on 3D printing technology are the same as those in Embodiment 1-2, see figure 2 , the side length a of the dielectric block 1 is selected between 4.5mm~5mm, the side length b is also selected between 4.5mm~5mm and the side length c is selected between 5.8mm~6.8mm, in the present invention a =b. The reflective unit 6 is set at a period of 12 mm to 20 mm. see image 3 , the height h of the dielectric block 1 of the present invention changes from 5.5mm to 23mm, and the reflection phase of the dielectric reflection unit 6 changes from -123° to -486° accordingly. In the present invention, there is a one-to-one correspondence between the height of the dielectric block 1 and the reflection phase. In this embodiment, a=b=4.5mm, c=6.8mm, and the period of the reflection unit 6 is set to 20mm, which is mostly used in situations where circular polarization is highly required...

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Abstract

The invention discloses a circular polarization medium reflection unit and a reflection array antenna based on 3D printing technology, which solves the problem that the circular polarization characteristics and processing of the medium reflection array antenna cannot be simultaneously realized at present. The circularly polarized medium reflection unit includes a dielectric block, a dielectric bottom plate and a metal floor; both the dielectric block and the dielectric bottom plate are made of dielectric materials with a dielectric constant between 3.4 and 4.1, and are processed by photocuring 3D printing technology; the medium block is a hexagonal prism The structure realizes the conversion from linear polarization to circular polarization; changing its height adjusts the reflection phase. The circularly polarized dielectric reflectarray antenna includes a reflective array and a feed source. The reflective array is composed of an array of dielectric reflective elements; the feed source is a linearly polarized waveguide probe. The hexagonal prism structure in the present invention ensures that the reflectarray antenna adopting a low dielectric constant dielectric material can realize circular polarization characteristics and processing at the same time; it alleviates the current situation that the gain bandwidth of the existing reflectarray antenna is relatively narrow, and effectively widens the reflectarray antenna. Gain bandwidth, used in satellite communications.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a circularly polarized reflective array antenna, in particular to a circularly polarized medium reflective unit and a reflective array antenna based on 3D printing technology. Used in radar and satellite communications. Background technique [0002] The reflectarray antenna uses the phase shift characteristics of the reflective unit to compensate the phase difference caused by the path difference between the incident wave from the feed source and the equal-phase plane, thereby forming a concentrated beam perpendicular to the equal-phase plane, which is different from the traditional reflector antenna Compared with its compact structure, it is more suitable for space-constrained occasions such as portable satellite communication antennas. [0003] In recent years, dielectric reflectarray antennas have received extensive attention due to their combination with 3D printing technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q15/14H01Q15/24H01Q21/00
CPCH01Q15/145H01Q15/244H01Q21/0006
Inventor 郝佳文史小卫魏峰徐乐
Owner XIDIAN UNIV
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