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A liquid crystal reconfigurable multi-beam phased array

A phased array antenna, two-dimensional array technology, applied in the field of phased arrays, can solve the problems of high loss, low aperture efficiency, large antenna profile, etc.

Active Publication Date: 2021-08-20
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using liquid crystals to form tunable reflective surfaces or reflective arrays results in a large F / D (focal length / aperture size), which results in an antenna with an excessively large profile
In addition, tunable reflective surfaces suffer from high losses at the resonant frequency, which results in inefficient apertures

Method used

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  • A liquid crystal reconfigurable multi-beam phased array
  • A liquid crystal reconfigurable multi-beam phased array
  • A liquid crystal reconfigurable multi-beam phased array

Examples

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Embodiment Construction

[0039]Example embodiments of low-profile, electronically reconfigurable phased arrays implemented using electrostatically controllable liquid crystal-loaded metamaterials are described below. In an example embodiment, the phased array structure includes a plurality of reconfigurable lens enhanced radiators. In at least some applications, the use of lens-enhanced radiating elements can increase the effective aperture of each radiator, thereby reducing the overall complexity of the phased array. Using a liquid crystal-loaded metamaterial lens allows independent electronic tuning of the transmission phase of each subarray through the phased array aperture. The array can be fed in groups to form flexible hybrid beams for multiple beams, or with coherent phases across the apertures to form highly directional steerable beams. Using multiple feeds with smaller subarrays can reduce the overall cross section of the array because the focal length from the lens is much smaller by implem...

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Abstract

SUMMARY OF THE SPECIFICATION A phased array antenna comprising a two-dimensional array of lens-enhanced radiator elements, each radiator element comprising: a radiator for generating a radio frequency (RF) signal; A two-dimensional phase variable lens group defining an aperture in the path, the lens group comprising a two-dimensional array of individually controllable lens elements such that a varying transmission phase can be applied to the RF signal across the aperture of the lens group. In addition, the unit cell of the lens element is made of a metamaterial sheet, said unit cell comprising a stack of unit cell layers, said unit cell layer comprising a mass of nematic liquid crystals with a controllable dielectric value, enabling each cell layer to function as a tunable resonator.

Description

[0001] related application [0002] The present invention claims U.S. Provisional Patent Application No. 62 / 492,587, filed May 1, 2017, titled "A Liquid Crystal Reconfigurable Multibeam Phased Array," and the title of invention filed on August 29, 2017 Priority application to US Patent Application No. 15 / 689,817 for "A Liquid Crystal Reconfigurable Multibeam Phased Array," the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to phased arrays. The invention particularly relates to a liquid crystal reconfigurable metasurface multi-beam phased array. Background technique [0004] Next-generation wireless networks are likely to rely on higher-frequency, shorter-wavelength radio waves, including, for example, the use of millimeter-wave technology in the 24GHz to 100GHz band. At these frequencies, larger apertures and more directional antennas may be used to compensate for higher propagation losses. A common technolo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/06H01Q15/10
CPCH01Q15/0066H01Q1/523H01Q15/002H01Q19/06H01Q3/34H01Q3/44H01Q19/062H01Q21/0025H01Q21/061H01Q3/2605
Inventor 森格利·福
Owner HUAWEI TECH CO LTD