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Conformal liquid crystal optical phased array antenna and wave control method and device thereof

A phased array antenna, liquid crystal optics technology, applied in the direction of antenna, antenna array, antenna grounding switch structure connection, etc., can solve the problems of large influence of aircraft surface aerodynamic performance, limited antenna area, low driving voltage, etc. Effective use of area, increased beam scanning range, and the effect of wide spatial angle coverage

Active Publication Date: 2020-07-17
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical method has the disadvantages of slow response speed, low control precision and poor flexibility, and it is difficult to meet the application requirements of fast capture, high-precision tracking, and fast agility; among non-mechanical methods, liquid crystal optical phased array (LCOPA) adopts Liquid crystal with low driving voltage and large depth of phase modulation is used as an electro-optic material for phase modulation, which has the advantages of high pointing accuracy, low driving voltage, and many effective pixels, and has become an important research direction for laser phase control technology.
[0003] The beam scanning range of the planar liquid crystal optical phased array antenna is affected by factors such as the size and structure of the unit antenna (including the shape, thickness, size, and array unit size of the liquid crystal cell, etc.), which makes the field of view of the planar phased array antenna narrow (approximately ± 3°), large impact on the aerodynamic performance of the aircraft surface, limited antenna area and low antenna installation flexibility

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  • Conformal liquid crystal optical phased array antenna and wave control method and device thereof
  • Conformal liquid crystal optical phased array antenna and wave control method and device thereof
  • Conformal liquid crystal optical phased array antenna and wave control method and device thereof

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Embodiment 1

[0026] Such as figure 1 Shown is a schematic structural diagram of the conformal liquid crystal optical phased array antenna provided by the present invention and Embodiment 1. The conformal liquid crystal optical phased array antenna includes: an arc-shaped upper substrate 21 and an arc-shaped lower substrate that are oppositely arranged and have the same shape. 27. A common electrode 22 is formed on the side of the upper substrate 21 facing the lower substrate 27, and a layer of alignment layer 23 is formed on the side of the lower substrate 21 where the common electrode 22 is formed; a grating array is formed on the side of the lower substrate 27 facing the upper substrate 21 There is a certain interval between the electrodes 25 and the grating array electrodes 25 , and an alignment layer 26 is formed on the side of the lower substrate 27 where the grating array electrodes 25 are formed; the liquid crystal 24 is filled between the alignment layer 23 and the alignment layer 2...

Embodiment 2

[0030] Such as figure 2 As shown, it is a conformal liquid crystal optical phased array with arc shape as a special case. This device can realize conformal characteristics and achieve large-angle beam scanning. In order to achieve the above object, the present invention provides a wave control method of conformal liquid crystal optical phased array, which can calculate the relationship between the phase shift of each radiation unit and the scanning angle.

[0031] For the conformal liquid crystal optical phased array, the method of pure phase modulation is adopted, and different quantization voltages are applied to generate a certain phase shift amount Δφ (Δφ is the phase transition amount of the adjacent phase control unit of the liquid crystal optical phased array antenna), so that it can emit The wavefront is a phase step similar to a blazed grating. According to the voltage-phase shift curve of the conformal liquid crystal phased array, the voltage loaded on each unit ca...

Embodiment 3

[0038] Such as image 3 Shown is a schematic structural diagram of a conformal liquid crystal optical phased array device provided in Embodiment 3 of the present invention. The conformal liquid crystal optical phased array device includes: a laser 41, a focusing lens 42, a conformal liquid crystal optical phased array device 43, The liquid crystal optical phased array antenna adopts the conformal liquid crystal optical phased array in the first embodiment above. The specific structure of the phased array can refer to the first embodiment. The wave control method of the conformal liquid crystal optical phased array adopts the above-mentioned The conformal liquid crystal optical phased array wave control method in the second embodiment will not be repeated here.

[0039]This embodiment implements a large-angle beam deflection device based on a conformal liquid crystal optical phased array antenna. The incident light wave generated by the laser is a plane wave, and the beam is fo...

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Abstract

The invention discloses a conformal liquid crystal optical phased array antenna and a wave control method and device thereof, is applied to the fields of free space laser communication, laser radar and the like, and solves the problems that an existing planar liquid crystal optical phased array antenna is narrow in view field range, large in influence on the aerodynamic performance of the surfaceof an aircraft, limited in antenna area, low in antenna installation flexibility and the like. The core device of the conformal liquid crystal optical phased array antenna adopts a conformal design scheme to form the conformal liquid crystal optical phased array antenna so that a larger angle coverage range be achieved, and the influence of the antenna on the aerodynamic performance of a communication terminal can be reduced. The conformal liquid crystal optical phased array has a large beam scanning range and can achieve wider airspace angle coverage.

Description

technical field [0001] The invention belongs to the fields of free space laser communication, laser radar, etc., and in particular relates to a liquid crystal optoelectronic device and laser phase control technology. Background technique [0002] The laser phase control system has been more and more widely used in the field of free space optical communication and laser radar. At present, there are two kinds of laser space scanning control methods researched at home and abroad: mechanical and non-mechanical. The mechanical method has the disadvantages of slow response speed, low control precision and poor flexibility, and it is difficult to meet the application requirements of fast capture, high-precision tracking, and fast agility; among non-mechanical methods, liquid crystal optical phased array (LCOPA) adopts As an electro-optic material for phase modulation, liquid crystal with low driving voltage and large depth of phase modulation has the advantages of high pointing acc...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50H01Q3/26H01Q3/34H01Q21/00G06F17/11
CPCG06F17/11H01Q1/36H01Q1/38H01Q1/50H01Q3/2658H01Q3/2676H01Q3/34H01Q21/00
Inventor 汪相如吴亮熊彩东
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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