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A Broadband Planar Reflectarray Unit for Reconfigurable Planar Reflectarray

A planar reflectarray and broadband technology, applied in the direction of electrical components, antenna arrays, antennas, etc., can solve the problems of fast scanning speed, small power capacity, and low radio frequency power capacity, and achieve excellent phase shifting characteristics, large power capacity, and small The effect of volume structure

Inactive Publication Date: 2020-09-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electronic device tuning technology has fast scanning speed, low bias voltage, and low DC power consumption. It is currently the most mature beam scanning control method, but it is limited by the low RF power capacity of the electronic devices used.
At the same time, since the adjustable electronic device has a cut-off frequency limit, and as the frequency increases, the loss of the electronic device will increase, so it is not suitable for high-frequency, high-power
[0004] Aiming at the problems of large loss, narrow bandwidth, small power capacity, and difficulty in working in high frequency bands in traditional planar reflectarrays, the present invention proposes a broadband planar reflectarray unit for reconfigurable planar reflectarrays, which has wide bandwidth, linear Good precision, low loss, large power capacity, etc., can be used for reconfigurable planar reflectarray

Method used

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  • A Broadband Planar Reflectarray Unit for Reconfigurable Planar Reflectarray
  • A Broadband Planar Reflectarray Unit for Reconfigurable Planar Reflectarray
  • A Broadband Planar Reflectarray Unit for Reconfigurable Planar Reflectarray

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Embodiment 1

[0029] This embodiment provides a broadband planar reflectarray unit for a reconfigurable planar reflectarray, such as figure 2 , the broadband planar reflectarray unit used for the reconfigurable planar reflectarray includes two layers of dielectric layers, which are the first dielectric layer 6 and the second dielectric layer 9, and the first dielectric layer 6 and the second dielectric layer 9 are arranged between There is a liquid crystal cavity 10, the surface of the first dielectric layer 6 in contact with the liquid crystal cavity 10 is provided with a metal unit 5 and the first liquid crystal alignment layer 4 in sequence, and the surface of the second dielectric layer 9 in contact with the liquid crystal cavity 10 is provided with a metal ground plane 3. The second liquid crystal alignment layer 4; the metal unit 5 is a multi-resonant unit; the first liquid crystal alignment layer 4 at least covers the metal unit 5; the liquid crystal cavity 10 is filled with liquid c...

Embodiment 2

[0038] In this embodiment, the multi-resonance unit is improved into a sub-wavelength multi-resonance structural unit.

[0039] Subwavelength technology is an excellent broadband unit, but it faces the problem that the phase shift range caused by the small grid length is too narrow. At the same time, the multi-resonant unit based on phase optimization can expand the phase shift range of the unit in a limited grid space, reduce the gradient of the phase curve, and broaden the working bandwidth of the reflectarray antenna. Therefore, in order to further improve the performance of the multi-resonance unit, combining the respective advantages of sub-wavelength and multi-resonance technologies, this implementation introduces the multi-resonance unit into the sub-wavelength grid in order to expect the unit to obtain a wider operating frequency band and better phase shifting characteristic.

[0040] Such as Image 6 It is the sub-wavelength multi-resonance structural unit of this e...

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Abstract

The present invention is a broadband planar reflector unit for reconfigurable planar reflectarrays, which solves the technical problems of large loss, narrow bandwidth, small power capacity, and difficulty in working in high-frequency bands. By adopting two dielectric layers, it is The first medium layer and the second medium layer, a liquid crystal cavity is arranged between the first medium layer and the second medium layer, and a metal unit and a first liquid crystal alignment layer are sequentially arranged on the surface of the first medium layer in contact with the liquid crystal cavity, and the second medium layer is in contact with the liquid crystal cavity. The surface of the second medium layer in contact with the liquid crystal cavity is provided with a metal ground plane and a second liquid crystal alignment layer; the metal unit is a multi-resonant unit; the first liquid crystal alignment layer at least covers the metal unit; the liquid crystal cavity is filled with Liquid crystal material; also includes an external bias unit, a technical solution in which one connection end of the external bias unit is electrically connected to the metal unit, and the other connection end is electrically connected to the metal ground plane, which better solves this problem and can be used for in planar reflectarray antennas.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a broadband planar reflectarray unit for a reconfigurable planar reflectarray. Background technique [0002] The planar reflectarray antenna is generally composed of periodically arranged reflective arrays and feed sources. By adjusting the reflection coefficient of each discrete unit, the amplitude and phase of each discrete point on the array can be designed and controlled, so as to realize the Dynamic regulation of the beam. [0003] The existing beam scanning planar reflectarray antenna adopts mechanical tuning technology and electronic device tuning technology. Mechanical tuning technology realizes beam scanning by adjusting the position of the feed horn, rotating the phase shift unit on the aperture of the reflecting surface, and other means. Mechanical tuning technology has slow scanning speed, high bias voltage and poor reliability. Electronic tuning technology mainly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q23/00H01Q21/00H01Q19/10H01Q3/46H01Q1/48
Inventor 陈会万应禄石宪青朱磊
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA