Broadband coded folded reflectarray antenna based on subwavelength single-layer reflecting units

A reflection array antenna and reflection unit technology, which is applied in the microwave and radio frequency fields, can solve the problems of complex structure, high design difficulty and high processing cost of the reflection unit, and achieve the effects of reducing design difficulty, compact structure and low processing cost.

Active Publication Date: 2019-05-14
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The double-layer reflection unit used in the invention can independently control the reflection phases of two orthogonal polarizations, and ensure that the reflection phases of the two polarizations can achieve a good phase shift curve, and realize the broadband of the folded reflectarray antenna. characteristics, but the structure of the reflection unit is complicated and the number of layers is large, which makes the design more difficult and the processing cost is higher

Method used

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  • Broadband coded folded reflectarray antenna based on subwavelength single-layer reflecting units
  • Broadband coded folded reflectarray antenna based on subwavelength single-layer reflecting units
  • Broadband coded folded reflectarray antenna based on subwavelength single-layer reflecting units

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Embodiment 1

[0021] In view of the large size and heavy weight of the current parabolic antenna, the complex feed network of the phased array antenna, the expensive transceiver components, and the high profile of the traditional microstrip planar reflector, the present invention focuses on solving the problems of narrow bandwidth and complex design of the microstrip reflector. Research has been carried out on this, and a broadband coded folded reflector antenna based on sub-wavelength single-layer reflector unit is proposed, see figure 1 . The polarized grids of equal area and the main front are installed in parallel at equal intervals. The polarized grids are located directly above the main front. Four dielectric pillars are supported at the four corners of the polarized grids and the main front. Installed at the geometric center of the main front, see figure 1 The polarized grid 2 is a dielectric substrate 5 etched with a plurality of metal grids 4 arranged in parallel, the distance betwee...

Embodiment 2

[0026] The overall composition of the broadband coded folded reflect array antenna based on the sub-wavelength single-layer reflector unit is the same as that of Embodiment 1, see figure 2 In the present invention, the "0" reflecting unit 6 and the "1" reflecting unit 12 are both single-layer sub-wavelength structures, that is to say, the side length of each reflecting unit is the sub-wavelength at the working frequency. The traditional high-gain reflector antenna unit usually has a side length set at half the wavelength. Compared with the traditional half-wavelength reflector unit, the sub-wavelength reflector unit adopted in the present invention has a wider working bandwidth and a more compact structure.

Embodiment 3

[0028] The overall composition of the broadband coded folded reflector array antenna based on the sub-wavelength single-layer reflector unit is the same as that of Embodiment 1-2. In the present invention, the polarized grid plate and the main array jointly constitute the folded reflector array antenna, see figure 1 The distance between the polarization grid plate 2 and the main array 3 is 2.5 wavelengths, and the actual focal length is 5 wavelengths. The traditional reflector array antenna does not have a polarization grid plate, and its feed is located directly above the main array. The introduction of the plate 2 structure reduces the cross section of the traditional reflect array antenna by half, and the folded reflect array antenna reduces the cross section of the traditional reflect array antenna by half. The polarized grid plate 2 and the main front face 3 of the present invention have a side length of ten wavelengths. Generally, in the design of a reflective array antenna...

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Abstract

The invention provides a broadband coded folded reflectarray antenna based on subwavelength single-layer reflecting units, and solves the problems that the folded reflectarray antenna is narrow in bandwidth and high in design complexity. According to the antenna in the invention, a polarized grid plate and a main array surface equal in area are vertically installed at equal interval; a feed sourceis installed in the geometrical centre of the main array surface; the main array surface in the invention is composed of two subwavelength single-layer reflecting units having 180 DEG phase difference and the same structure by periodic coded arrangement according to a classical reflection array phase theory; in the two reflecting units having the 180 DEG phase difference in the invention, one reflecting unit is the 0 reflecting unit; the other reflecting unit is the 1 reflecting unit, which is formed by counterclockwise rotation of the 0 reflecting unit in 90 DEG; the folded reflectarray antenna in the invention has the high-gain pencil beam; the design difficulty of the antenna array is reduced; the bandwidth is wide; the design complexity is low; the advantages of high gain, low loss, compact structure, low cross polarization and the like of the folded reflectarray antenna are sufficiently played; and the antenna can be applied to a high-performance communication or radar system.

Description

Technical field [0001] The invention belongs to the field of microwave and radio frequency technology, and mainly relates to a high-gain reflector array antenna, in particular a broadband coded folded reflector array antenna based on a sub-wavelength single-layer reflector unit, which can be applied to the radio frequency front end of a wireless communication system. Background technique [0002] In recent years, with the continuous development of wireless communication systems, high-gain large-scale phased array antennas and parabolic antennas are widely used in the aviation field. Large phased array antennas have flexible wide-angle beam scanning capabilities. However, the complex feed network, high price of transceiver components, high power loss, and relatively low work efficiency restrict the use of phased array antennas in aerospace, radar, satellites, etc. The parabolic antenna has the advantages of simple structure, wide working frequency, strong directivity, and high gai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q19/10H01Q15/14H01Q15/24H01Q13/02
Inventor 魏峰赵西贝徐乐张晓航史小卫
Owner XIDIAN UNIV
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