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Liquid crystal array antenna beam forming and controlling method based on reference light modulation

A liquid crystal array and antenna beam technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of low beam signal-to-noise ratio and affect the overall effect, and achieve the effect of improving signal-to-noise ratio

Pending Publication Date: 2021-10-12
北京华光量算科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, due to the limited human control factors in the existing beam synthesis, error array elements will affect the overall effect, and the signal-to-noise ratio of beam synthesis is low

Method used

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Examples

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Embodiment 1

[0023] In an embodiment of the present invention, a liquid crystal array antenna beam forming and control method based on reference light modulation includes the following steps:

[0024] Step 1: Obtain the original echo signal received by the elements of the liquid crystal array antenna, and process the original echo signal through a preset light modulation layer; it should be noted that the light modulation layer includes cholesteric liquid crystals for responding to the preset Set the electric field to change the liquid crystal orientation;

[0025] The ratio of the threshold electric field at which the liquid crystal orientation of the first light modulation layer changes from a planar state to a focal conic state to the second light modulation layer is 1-7, and when the liquid crystal orientation of the first light modulation layer is in a planar state The ratio of the dielectric constant to the second light modulation layer is 5.5-8;

[0026] Step 2: Obtain the weighted...

Embodiment 2

[0033] In an embodiment of the present invention, a liquid crystal array antenna beam forming and control method based on reference light modulation includes the following steps:

[0034] Step 1: Obtain the original echo signal received by the elements of the liquid crystal array antenna, and process the original echo signal through a preset light modulation layer; it should be noted that the light modulation layer includes cholesteric liquid crystals for responding to the preset Set the electric field to change the liquid crystal orientation;

[0035] The ratio of the threshold electric field at which the liquid crystal orientation of the first light modulation layer changes from a planar state to a focal conic state to the second light modulation layer is 1-7, and when the liquid crystal orientation of the first light modulation layer is in a planar state The ratio of the dielectric constant to the second light modulation layer is 5.5-8;

[0036] Step 2: Obtain the weighted...

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Abstract

The invention discloses a liquid crystal array antenna beam forming and controlling method based on reference light modulation. The method comprises the following steps of acquiring the original echo signals received by the array elements of a liquid crystal array antenna, and processing the original echo signals through a preset light modulation layer; obtaining a weighted value of each array element of the liquid crystal array antenna; performing beam forming focusing to obtain a radio frequency beam; and obtaining the image data after imaging. The liquid crystal orientation of each light modulation layer can be clearly changed by applying different voltages between the electrodes by a reference light modulation method, thereby passing through the combination of the liquid crystal orientations of the light modulation layers; and since the beam forming focusing is carried out according to the original echo signal received by each ultrasonic array element and the corresponding weighting coefficient value, part of array elements with errors can be removed during beam forming focusing, so that the signal-to-noise ratio of beam forming is improved, and the method is controllable and modulatable.

Description

technical field [0001] The invention relates to a synthesis and control method, in particular to a liquid crystal array antenna beam synthesis and control method based on reference light modulation. Background technique [0002] Beamforming is derived from a concept of adaptive antennas. The signal processing at the receiving end can form the required ideal signal by weighting and combining the signals received by the multi-antenna elements. [0003] Beamforming is the combination of antenna technology and digital signal processing technology for directional signal transmission or reception. Beamforming is not a new term, but it is actually a classic traditional antenna technology. [0004] At present, due to the limited human control factors in the existing beam synthesis, error array elements will affect the overall effect, and the signal-to-noise ratio of beam synthesis is low. Contents of the invention [0005] Based on the deficiencies in the prior art mentioned ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02F1/139
CPCG02F1/13G02F1/139
Inventor 雷东杨华斌
Owner 北京华光量算科技有限公司
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