Fast-response bidirectional switching liquid crystal phased array and control method therefor

Abstract

A fast-response bidirectional switching liquid crystal phased array and a control method therefor. The liquid crystal phased array comprises: an upper substrate (102); a lower substrate (108); a liquid crystal medium (105) provided between the upper substrate (102) and the lower substrate (108); alignment layers (104, 106) provided above and below the liquid crystal medium (105); a Z-direction direct current bias network (110) and a one-to-many power divider (107) which are provided on the upper surface of the lower substrate (108); a Y-direction direct current bias network (109) provided on the lower surface of the lower substrate (108); a metal ground (103) provided on the lower surface of the upper substrate (102); and a plurality of antenna units coupled to the one-to-many power divider (107). The Z-direction direct current bias network (110) is controlled to apply a longitudinal electric field to liquid crystal molecules, and the Y-direction direct current bias network (109) is controlled to apply a transverse electric field to the liquid crystal molecules. The bidirectional switching liquid crystal phased array can achieve fast response, improving the performance indicators of reconfigurable millimeter wave phased array systems, thus facilitating the integration and development of reconfigurable millimeter wave systems.

Description

A fast-response bidirectional switch liquid crystal phased array and a control method thereof TECHNICAL FIELD

[0001] The present application relates to the field of wireless communication, in particular to a fast-response bidirectional switch liquid crystal phased array and a control method thereof. BACKGROUND

[0002] To meet the various services of mobile terminals operating in L, C, Ku, Ka or W bands, such as wireless Internet, multimedia, communication and broadcast services, electronic reconfigurable millimeter wave systems with small size, multi-function, high spectral efficiency and strong flexibility have become the current research hotspot, which are used for military and industrial ground station applications, including airborne, shipborne or automotive mobile terminals. The technical methods commonly used for phased array beam scanning include radio frequency micro-electromechanical system (RF MEMS), semiconductor solutions and ferroelectrics such as barium strontium titanate (BST). Another method is to use liquid crystal materials with low loss at high frequency bands. Among these methods, liquid crystals are superior to MEMS in terms of life, continuity and packaging; and are superior to BST in terms of frequency range and bias voltage, which are ideal materials for developing beam scanning phased arrays. Benefiting from the mature manufacturing process of liquid crystal display panels, liquid crystal phased arrays also have unique advantages in manufacturing costs. In the third generation partnership and new radio bands, liquid crystal-based phased array modules with cost competitiveness and high performance can support the ability of beamforming and beam steering, which are key technologies for emerging small cell base stations and client devices. Therefore, it is of great significance for the wireless communication system to study liquid crystal phased arrays suitable for various mobile terminals.

[0003] Liquid crystal phased arrays are small in size, light in weight and low in power consumption, meeting the light and thin and low power consumption requirements of modern communication equipment. Moreover, due to the electrically tunable properties of liquid crystals, continuous pattern scanning can be achieved. However, the liquid crystal layer of a liquid crystal phased array used in the millimeter wave frequency band is generally thick due to the limitation of the inverted microstrip line structure, and a liquid crystal layer thickness of several tens or even hundreds of microns is required to meet the electromagnetic wave transmission and phase modulation of the inverted microstrip liquid crystal phase shifter. However, a thick liquid crystal layer requires a high voltage for regulation, and also results in a relatively long response time of the phased array, which is generally in the order of seconds. The high bias voltage and slow response speed greatly limit the application of liquid crystal phased arrays in the field of wireless communication.

[0004] It should be noted that the information disclosed in the above background section is only for understanding the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] The main purpose of the present application is to overcome the defects of the above background technology, and to provide a fast-response bidirectional switch liquid crystal phased array and a control method thereof.

[0006] To achieve the above object, the present application adopts the following technical solutions:

[0007] A fast-response bidirectional switch liquid crystal phased array, comprising an upper substrate, a lower substrate, a liquid crystal medium arranged between the upper substrate and the lower substrate, and an orientation layer arranged above and below the liquid crystal medium, a Z-direction DC bias network and a multi-branch power divider arranged on the upper surface of the lower substrate, a Y-direction DC bias network arranged on the lower surface of the lower substrate, a metal ground arranged on the lower surface of the upper substrate, and a plurality of antenna units coupled to the multi-branch power divider; wherein the Z-direction DC bias network is controlled to apply a longitudinal electric field to the liquid crystal molecules, and the Y-direction DC bias network is controlled to apply a transverse electric field to the liquid crystal molecules.

[0008] Further, the Y-direction DC bias network comprises a first side metal and a second side metal arranged on both sides of the lower substrate respectively, the first side metal is connected with a row of positive insertion fingers, the second side metal is connected with a row of negative insertion fingers, and the positive insertion fingers and the negative insertion fingers are arranged alternately in a cross-isolated insertion finger structure.

[0009] Further, the plurality of antenna units comprises a plurality of slot-coupled patch antenna units arranged on the upper surface of the upper substrate, a plurality of coupling slots corresponding to each slot-coupled patch antenna unit are formed on the metal ground, and the multi-branch power divider is coupled to each slot-coupled patch antenna unit through the coupling slots.

[0010] Further, the slot-coupled patch antenna unit is rectangular, and the length direction of the slot-coupled patch antenna unit is perpendicular to the extension direction of the multi-branch power divider.

[0011] Further, the plurality of slot-coupled patch antenna units are arranged in a rectangular antenna array.

[0012] Further, the multi-branch power divider is a four-branch power divider.

[0013] Further, the upper substrate and the lower substrate are quartz glass substrates.

[0014] Further, the orientation layer is a polyimide film.

[0015] Further, the Z-direction DC bias network and the Y-direction DC bias network are controlled to perform one or more of the following operations: when the liquid crystal phased array is turned on, the Z-direction DC bias network and the Y-direction DC bias network are controlled to apply longitudinal and transverse electric fields at the same time to improve the response speed of the liquid crystal phased array turning on; when the liquid crystal molecules are modulated by the Z-direction DC bias network to realize anisotropic response, the Y-direction DC bias network continues to apply a transverse electric field to quickly reset the liquid crystal molecules; when the liquid crystal phased array is turned off, the Y-direction DC bias network is controlled to apply a transverse electric field to improve the response speed of the liquid crystal phased array turning off.

[0016] A control method of the bidirectional switch liquid crystal phased array with fast response comprises the following steps:

[0017] In the opening stage, the Z-direction DC bias network and the Y-direction DC bias network are controlled to apply longitudinal and transverse electric fields at the same time to improve the response speed of the liquid crystal phased array turning on.

[0018] In the modulation and reset stage, when the liquid crystal molecules are modulated by the Z-direction DC bias network to realize anisotropic response, the Y-direction DC bias network continues to apply a transverse electric field to quickly reset the liquid crystal molecules.

[0019] In the closing stage, the Y-direction DC bias network is controlled to apply a transverse electric field to improve the response speed of the liquid crystal phased array turning off.

[0020] The present application has the following beneficial effects:

[0021] The present application provides a bidirectional switch liquid crystal phased array with fast response, which is arranged with a Z-direction DC bias network on the upper surface of the lower substrate and a Y-direction DC bias network arranged on the lower surface of the lower substrate to provide a Y-direction bias electric field for the liquid crystal molecules, thereby increasing the regulation dimension of the liquid crystal molecules. The present application constructs a design of the Z-direction DC bias network and the Y-direction DC bias network working cooperatively to realize multi-dimensional regulation of the liquid crystal molecules, which can greatly reduce the response time of the liquid crystal phased array regulation and significantly improve the response speed of the phased array regulation.

[0022] Specifically, by combining the Z-direction DC bias network and the Y-direction DC bias network, both longitudinal electric field and transverse electric field can be applied to the liquid crystal. The simultaneous application of transverse and longitudinal electric fields can improve the response speed of the liquid crystal phased array opening; when the liquid crystal molecules are modulated by the Z-direction DC bias for longitudinal electric field, anisotropic response is realized, and then the Y-direction DC bias transverse electric field can be applied to make the liquid crystal molecules reset quickly, which is much faster than the natural reset speed of the liquid crystal molecules; in addition, the application of transverse electric field alone can significantly improve the response speed of the liquid crystal phased array closing. Thus, the application provides a fast-response bidirectional switch liquid crystal phased array, which can significantly improve the performance index of the reconfigurable millimeter wave phased array system, and is very beneficial to the integration and development of the reconfigurable millimeter wave system.

[0023] Other beneficial effects of the embodiments of the application will be further described below. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 is a three-dimensional view of the fast-response bidirectional switch liquid crystal phased array of the embodiments of the application;

[0025] Fig. 2 is a schematic view of the lower and upper surfaces of the lower quartz glass substrate of the fast-response bidirectional switch liquid crystal phased array of the embodiments of the application;

[0026] Fig. 3 is a schematic view of the lower and upper surfaces of the upper quartz glass substrate of the fast-response bidirectional switch liquid crystal phased array of the embodiments of the application;

[0027] Fig. 4 is a schematic view of the double electric control of the fast-response bidirectional switch liquid crystal phased array of the embodiments of the application;

[0028] Fig. 5 is a schematic view of the Y-direction DC bias network of the fast-response bidirectional switch liquid crystal phased array of the embodiments of the application.

[0029] Fig. 6 is a schematic view of the liquid crystal phased array regulation and scanning of the embodiments of the application. DETAILED DESCRIPTION

[0030] The embodiments of the application will be described in detail below. It should be emphasized that the following description is only exemplary and is not intended to limit the scope of the application and its applications.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be for fixing or for coupling or communicating.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] Referring to Figures 1 to 6, this embodiment of the invention provides a fast-response bidirectional switching liquid crystal phased array, including an upper substrate (e.g., an upper quartz glass substrate 102), a lower substrate (e.g., a lower quartz glass substrate 108), a liquid crystal medium 105 disposed between the upper substrate and the lower substrate, and alignment layers 104 and 106 disposed above and below the liquid crystal medium 105, a Z-direction DC bias network 110 and a power divider 107 disposed on the upper surface of the lower substrate, a Y-direction DC bias network 109 disposed on the lower surface of the lower substrate, a metal ground 103 disposed on the lower surface of the upper substrate, and a plurality of antenna elements coupled to the power divider 107; wherein, the Z-direction DC bias network 110 is controlled to apply a longitudinal electric field to the liquid crystal molecules, and the Y-direction DC bias network 109 is controlled to apply a transverse electric field to the liquid crystal molecules.

[0035] By utilizing the synergy of a Z-axis DC bias network 110 and a Y-axis DC bias network 109 respectively disposed on the upper and lower surfaces of the lower substrate, this embodiment of the invention achieves multi-dimensional electric field manipulation of liquid crystal molecules, effectively solving the problems of high voltage requirements and slow response time caused by the thick liquid crystal layer in traditional liquid crystal phased arrays. By applying a longitudinal electric field through the Z-axis DC bias network and a transverse electric field through the Y-axis DC bias network, this invention not only improves the response speed of the phased array's activation but also utilizes the transverse electric field of the Y-axis DC bias network to achieve rapid reset of the liquid crystal molecules at a speed far exceeding the natural reset speed. Furthermore, applying the transverse electric field alone can significantly improve the response speed of the phased array's deactivation. Therefore, this invention realizes a fast-response bidirectional switching liquid crystal phased array, which can significantly improve the performance indicators of reconfigurable millimeter-wave phased array systems.

[0036] As shown in Figures 2 and 4, in a preferred embodiment, the Y-direction DC bias network 109 includes a first side metal and a second side metal disposed on both sides of the lower substrate. The first side metal is connected to a row of positive electrode interpolations, and the second side metal is connected to a row of negative electrode interpolations. The positive electrode interpolations and the negative electrode interpolations are arranged alternately in a cross-isolated interpolation structure. The preferred embodiment designs a cross-isolated Y-direction DC bias network to provide a Y-direction bias electric field for the liquid crystal molecules, thereby increasing the controllability dimension of the liquid crystal molecules. Furthermore, this cross-isolated Y-direction DC bias network design facilitates precise control of the orientation of the liquid crystal molecules and improves the overall performance of the liquid crystal phased array.

[0037] As shown in Figures 1 and 3, in a preferred embodiment, the plurality of antenna elements include a plurality of slot-coupled patch antenna elements 101 arranged on the upper surface of the upper substrate. A plurality of coupling slots corresponding one-to-one with each slot-coupled patch antenna element 101 are formed on the metal ground 103. The one-to-many power divider 107 is coupled to each slot-coupled patch antenna element 101 through the coupling slots. Referring to Figure 6, the preferred embodiment, through the slot-coupled feeding patch antenna element design, allows the phased array to achieve an efficient feeding method. This slot coupling provides a good electromagnetic field distribution, which helps to improve the radiation efficiency and bandwidth of the antenna elements. It enables two-dimensional scanning based on liquid crystal electro-tuning and achieves high radiation gain and wide impedance bandwidth, effectively meeting the control requirements of two-dimensional scanning of liquid crystal phased arrays.

[0038] As shown in Figures 1 and 3, in a preferred embodiment, the slot-coupled patch antenna element 101 is rectangular, and its length direction is perpendicular to the extension direction of the power divider 107.

[0039] As shown in Figures 1 and 3, in a preferred embodiment, the plurality of slot-coupled patch antenna elements 101 are arranged in a rectangular antenna array.

[0040] As shown in Figure 2, in some embodiments, the one-to-many power divider 107 is a one-to-four power divider.

[0041] Referring to Figure 6, in a preferred embodiment, the Z-direction DC bias network 110 and the Y-direction DC bias network 109 are controlled to perform one or more of the following operations: when the liquid crystal phased array is turned on, the Z-direction DC bias network 110 and the Y-direction DC bias network 109 are controlled to simultaneously apply longitudinal and transverse electric fields to improve the response speed of the liquid crystal phased array turning on; after the liquid crystal molecules are modulated by the longitudinal electric field of the Z-direction DC bias network 110 to achieve anisotropic response, the Y-direction DC bias network 109 continues to apply a transverse electric field to make the liquid crystal molecules quickly reset; when the liquid crystal phased array is turned off, the Y-direction DC bias network 109 is controlled to apply a transverse electric field separately to improve the response speed of the liquid crystal phased array turning off.

[0042] This invention also provides a control method for the fast-response bidirectional switching liquid crystal phased array, comprising:

[0043] During the startup phase, the Z-direction DC bias network 110 and the Y-direction DC bias network 109 are controlled to simultaneously apply longitudinal and transverse electric fields to improve the startup response speed of the liquid crystal phased array.

[0044] During the modulation and reset phase, after the liquid crystal molecules are modulated by the longitudinal electric field of the Z-direction DC bias network 110 to achieve anisotropic response, the transverse electric field is continued to be applied by the Y-direction DC bias network 109 to make the liquid crystal molecules reset quickly.

[0045] During the shutdown phase, the Y-direction DC bias network 109 is individually controlled to apply a transverse electric field to improve the shutdown response speed of the liquid crystal phased array.

[0046] Referring to Figures 1 to 6, in some embodiments, a fast-response bidirectional switching liquid crystal phased array includes a 1-to-4 power divider, a Y-axis DC bias network, a Z-axis DC bias network, a slot-coupled patch antenna element, a coupling slot, a metal ground, a liquid crystal medium, and upper and lower quartz glass substrates. It also includes polyimide films disposed above and below the liquid crystal medium as alignment layers for the liquid crystal medium molecules. The Y-axis DC bias network is located on the lower surface of the lower quartz glass substrate, and the Z-axis DC bias network and the 1-to-4 power divider are located on the upper surface of the lower quartz glass substrate. The coupling slot and the metal ground are located on the lower surface of the upper quartz glass substrate, and the slot-coupled patch antenna array is located on the upper surface of the upper quartz glass substrate. The Z- and Y-direction DC bias networks can apply both longitudinal and transverse electric fields to the liquid crystal. Simultaneous application of both transverse and longitudinal electric fields significantly improves the response speed of the liquid crystal phased array when it is turned on. Applying only a transverse electric field significantly improves the response speed of the liquid crystal phased array when it is turned off. After the liquid crystal molecules are modulated by the longitudinal electric field of the Z-direction DC bias to achieve anisotropic response, the transverse electric field of the Y-direction DC bias can be applied to make the liquid crystal molecules reset rapidly at a speed much faster than the natural reset speed of the liquid crystal molecules.

[0047] The following describes specific embodiments of the present invention.

[0048] As shown in Figures 1-3, a fast-response bidirectional switching liquid crystal phased array includes a one-to-many power divider 107, a Y-direction DC bias network 109, a Z-direction DC bias network 110, a slot-coupled patch antenna unit 101, a coupling slot 111, a metal ground 103, a liquid crystal medium 105, and upper and lower quartz glass substrates 102 and 108. It also includes polyimide films disposed above and below the liquid crystal medium 105 as alignment layers 104 and 106 for the liquid crystal medium molecules.

[0049] The Y-direction DC bias network 109 is located on the lower surface of the lower quartz glass substrate 108, and the Z-direction DC bias network 110 and the one-to-many power divider 107 are located on the upper surface of the lower quartz glass substrate 108. The coupling slot 111 and the metal ground 103 are located on the lower surface of the upper quartz glass substrate 102, and the slot-coupled patch antenna element 101 is located on the upper surface of the upper quartz glass substrate 102.

[0050] The liquid crystal medium 105 is oriented by alignment layers 104 and 106, fixed between the upper quartz glass substrate 102 and the lower quartz glass substrate 108, and is evenly distributed on the multi-power divider 107.

[0051] The gain of the slot-coupled patch antenna element 101 increases further with the increase of patch size. Depending on the desired radiation pattern, the coupling slot can be applied directly below or to the side of the slot-coupled patch antenna element. In one embodiment, the coupling slot is designed as an H-shaped slot. In another embodiment, a straight slot can also be used. Better coupling efficiency can be obtained by optimizing the geometry of the slot.

[0052] Figure 4 shows a schematic diagram of liquid crystal control in a fast-response bidirectional switching liquid crystal phased array according to an embodiment of the present invention. Conventional liquid crystal electro-control (left) can only control the orientation of liquid crystal molecules by applying a longitudinal electric field. However, the bidirectional switching structure (right) proposed in this invention can control the orientation of liquid crystal molecules by applying both a longitudinal and a transverse electric field. Specifically, applying both transverse and longitudinal electric fields simultaneously can improve the response speed of the liquid crystal phased array turning on; applying only a transverse electric field can improve the response speed of the liquid crystal phased array turning off.

[0053] Figure 5 shows the Y-axis DC bias network structure of a fast-response bidirectional switching liquid crystal phased array according to an embodiment of the present invention. The positive and negative terminals of the DC voltage are arranged alternately in a cross-isolated interposer structure. The positive interposers are all connected to the first side metal, and the negative interposers are all connected to the second side metal. From left to right in the figure, the interposers are alternating between positive and negative interposers. By applying a DC voltage to the positive and negative terminals of the cross-isolated Y-axis DC bias network, a lateral electric field can be obtained, thereby controlling the lateral orientation of the liquid crystal molecules.

[0054] In summary, this invention provides a fast-response bidirectional switching liquid crystal phased array. By combining a Z-axis DC bias network and a Y-axis DC bias network, it can apply both longitudinal and transverse electric fields to the liquid crystal. Simultaneous application of both longitudinal and transverse electric fields improves the turn-on response speed of the liquid crystal phased array. After the liquid crystal molecules achieve anisotropic response through longitudinal electric field modulation by the Z-axis DC bias, a transverse electric field by the Y-axis DC bias can be applied, allowing the liquid crystal molecules to quickly reset, which is much faster than the natural reset speed. Furthermore, applying only a transverse electric field significantly improves the turn-off response speed of the liquid crystal phased array. These three control methods correspond to different operating states of the liquid crystal phased array, including fast turn-on, fast reset, and fast turn-off, to meet the response speed requirements of different application scenarios. The solution of this invention overcomes the shortcomings of traditional liquid crystal phased arrays, such as high voltage requirements and slow response times due to the thick liquid crystal layer. It can significantly improve the performance indicators of reconfigurable millimeter-wave phased array systems, which is highly beneficial for the integration and development of reconfigurable millimeter-wave systems.

[0055] The above description provides a further detailed explanation of the present invention in conjunction with specific / preferred embodiments, and it should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the scope of protection of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. A fast-response bidirectional switching liquid crystal phased array, characterized in that, The device includes an upper substrate, a lower substrate, a liquid crystal medium disposed between the upper substrate and the lower substrate, alignment layers disposed above and below the liquid crystal medium, a Z-direction DC bias network and a power divider disposed on the upper surface of the lower substrate, a Y-direction DC bias network disposed on the lower surface of the lower substrate, a metal ground disposed on the lower surface of the upper substrate, and a plurality of antenna elements coupled to the power divider; wherein the Z-direction DC bias network is controlled to apply a longitudinal electric field to the liquid crystal molecules, and the Y-direction DC bias network is controlled to apply a transverse electric field to the liquid crystal molecules.

2. The bidirectional switching liquid crystal phased array as described in claim 1, characterized in that, The Y-direction DC bias network includes a first side metal and a second side metal disposed on both sides of the lower substrate. The first side metal is connected to a row of positive terminal fingers, and the second side metal is connected to a row of negative terminal fingers. The positive terminal fingers and the negative terminal fingers are arranged alternately in a cross-isolated finger structure.

3. The bidirectional switching liquid crystal phased array as described in claim 1 or 2, characterized in that, The plurality of antenna units include a plurality of slot-coupled patch antenna units arranged on the upper surface of the upper substrate. A plurality of coupling slots corresponding one-to-one with each slot-coupled patch antenna unit are provided on the metal ground. The one-to-many power divider is coupled to each slot-coupled patch antenna unit through the coupling slots.

4. The bidirectional switching liquid crystal phased array as described in claim 3, characterized in that, The slot-coupled patch antenna element is rectangular, and its length direction is perpendicular to the extension direction of the one-to-many power divider.

5. The bidirectional switching liquid crystal phased array as described in claim 3, characterized in that, The multiple slot-coupled patch antenna elements are arranged into a rectangular antenna array.

6. The bidirectional switching liquid crystal phased array as described in claim 1 or 2, characterized in that, The one-to-many power divider is a one-to-four power divider.

7. The bidirectional switching liquid crystal phased array as described in claim 1 or 2, characterized in that, The upper substrate and the lower substrate are quartz glass substrates.

8. The bidirectional switching liquid crystal phased array as described in claim 1 or 2, characterized in that, The orientation layer is a polyimide film.

9. The bidirectional switching liquid crystal phased array as described in claim 1 or 2, characterized in that, The Z-direction DC bias network and the Y-direction DC bias network are controlled to perform one or more of the following operations: when the liquid crystal phased array is turned on, the Z-direction DC bias network and the Y-direction DC bias network are controlled to simultaneously apply longitudinal and transverse electric fields to improve the response speed of the liquid crystal phased array turning on; after the liquid crystal molecules are modulated by the longitudinal electric field by the Z-direction DC bias network to achieve anisotropic response, the Y-direction DC bias network continues to apply a transverse electric field to make the liquid crystal molecules quickly reset; when the liquid crystal phased array is turned off, the Y-direction DC bias network is controlled to apply a transverse electric field to improve the response speed of the liquid crystal phased array turning off.

10. A control method for a bidirectional switching liquid crystal phased array as described in any one of claims 1 to 9, characterized in that, include: During the startup phase, the Z-axis DC bias network and the Y-axis DC bias network are simultaneously subjected to longitudinal and transverse electric fields to improve the startup response speed of the liquid crystal phased array. During the modulation and reset phase, after the liquid crystal molecules are modulated by the longitudinal electric field of the Z-direction DC bias network to achieve anisotropic response, the transverse electric field is continued to be applied by the Y-direction DC bias network to make the liquid crystal molecules quickly reset. During the shutdown phase, the transverse electric field is applied to the Y-direction DC bias network separately to improve the shutdown response speed of the liquid crystal phased array.

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