Liquid crystal phased array signal transmission device and phased array antenna

Abstract

The invention provides a liquid crystal phase shifter signal transmission device and a phased-array antenna. The liquid crystal phased-array signal transmission device comprises a double-layer non-glass medium, a double-layer glass panel layer, a liquid crystal layer and a plurality of metal layers, wherein a transmission structure is arranged among the glass panel layer, the liquid crystal layer and the metal layer; open grooves are formed in the two metal layers in contact with the glass panel layer, and the transmission structures correspond to the open grooves; the transmission structure is provided with an upper electrode and a lower electrode in the liquid crystal layer; wherein the upper electrode is positioned on the lower surface of the upper-layer glass and corresponds to the open slot; the lower electrode is positioned on the upper surface of the lower-layer glass; a coupling assembly is arranged between the upper electrode and the lower electrode; the non-glass dielectric layer is provided with a microstrip line and a resonant cavity, and the microstrip line and the resonant cavity correspond to the transmission structure. The device can realize good electromagnetic wave transmission between a glass medium and a non-glass medium, reduces the system loss of a liquid crystal phased-array antenna, and has broadband performance.

Description

Technical Field

[0001] The present invention relates to the technical field of phased array equipment, and in particular to a liquid crystal phased array signal transmission device and a phased array antenna. Background Art

[0002] In the microwave frequency band, when phased array devices transmit signals across two layers of substrates, it is usually necessary to use metal through holes to form an equivalent coaxial line or waveguide structure because it is difficult to make complete metal side walls in non-glass media. However, when one of the layers is a glass plate and a through hole cannot be made or the cost of making a through hole is too high, it is easy to cause the transmission structure to generate lateral radiation of electromagnetic waves, resulting in poor coupling effect and causing large losses when transmitting electromagnetic wave signals. In particular, when phased array devices such as liquid crystal phase shifters made of glass are needed to realize the functions of phased array antennas, there is still a lack of relevant implementation plans in the prior art. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a liquid crystal phased array signal transmission device and a phased array antenna, which can achieve good electromagnetic wave transmission between glass medium and non-glass medium, reduce the system loss of the liquid crystal phased array antenna, and have broadband performance.

[0004] In a first aspect, the present invention provides a liquid crystal phased array signal transmission device, the liquid crystal phased array signal transmission device comprising: a non-glass dielectric layer, a glass panel layer, a liquid crystal layer and a metal layer; wherein a transmission structure is provided between the glass panel layer, the liquid crystal layer and the metal layer;

[0005] The non-glass dielectric layer includes an upper non-glass dielectric layer and a lower non-glass dielectric layer, and the glass panel layer includes an upper glass layer and a lower glass layer; the upper non-glass dielectric layer is located above the upper glass layer, and the lower non-glass dielectric layer is located below the lower glass layer; the liquid crystal layer is arranged between the upper glass layer and the lower glass layer;

[0006] The metal layer is arranged on the top of the upper glass and the bottom of the lower glass; the metal layer is provided with grooves, and the transmission structure corresponds to the grooves;

[0007] The transmission structure is provided with an upper electrode and a lower electrode in the liquid crystal layer; wherein the upper electrode is located on the lower surface of the upper glass layer and corresponds to the groove; the lower electrode is located on the upper surface of the lower glass layer; a coupling component is provided between the upper electrode and the lower electrode, and a liquid crystal layer is sandwiched;

[0008] Microstrip lines and resonant cavities are arranged in the upper non-glass dielectric layer and the lower non-glass dielectric layer; the microstrip lines and the resonant cavities both correspond to the transmission structure.

[0009] Optionally, the coupling component includes a first hook arm and a second hook arm; wherein the first hook arm is located in the lower electrode, and a first dipole is arranged in the first hook arm; the second hook arm is located in the upper electrode, and a second dipole is arranged in the second hook arm.

[0010] Optionally, the first hook-shaped arm includes: a first protrusion and a first metal arm; wherein the first protrusion is tower-shaped, the first metal arm is L-shaped, and the first protrusion is connected to the first metal arm through the top of the tower.

[0011] Optionally, the second hook-shaped arm includes: a second protrusion and a second metal arm; wherein the second protrusion is rectangular, the second metal arm is L-shaped, and the second protrusion is connected to the second metal arm through one end of the rectangle.

[0012] Optionally, the first hook-shaped arm also includes a surrounding metal layer, which is a rectangular hole-shaped structure. The first protrusion is connected to the surrounding metal layer through the tower-shaped bottom, and the first protrusion and the first metal arm are both arranged in the surrounding metal layer.

[0013] Optionally, the metal layer comprises: a top metal stratum, an upper middle metal stratum, a lower middle metal stratum and a bottom metal stratum;

[0014] wherein the top metal layer is disposed on top of the upper non-glass dielectric layer;

[0015] The middle upper metal layer is disposed between the upper glass layer and the upper non-glass dielectric layer;

[0016] The middle and lower metal stratum is disposed between the lower glass layer and the lower non-glass dielectric layer;

[0017] The bottom metal layer is disposed at the bottom of the lower non-glass dielectric layer.

[0018] Optionally, the resonant cavity is composed of a plurality of metal through holes connected to the metal layer, and the resonant region surrounded by the metal through holes corresponds to the transmission structure.

[0019] In a second aspect, the present invention provides a phased array antenna, in which the liquid crystal phased array signal transmission device mentioned in the first aspect is provided.

[0020] The present invention provides a liquid crystal phased array signal transmission device and a liquid crystal phased array antenna, wherein the liquid crystal phased array signal transmission device comprises: a non-glass dielectric layer, a glass panel layer, a liquid crystal layer and a metal layer; wherein a transmission structure is arranged between the glass panel layer, the liquid crystal layer and the metal layer; wherein the non-glass dielectric layer comprises an upper non-glass dielectric layer and a lower non-glass dielectric layer, and the glass panel layer comprises an upper glass layer and a lower glass layer; the upper non-glass dielectric layer is located above the upper glass layer, and the lower non-glass dielectric layer is located below the lower glass layer; and the liquid crystal layer is arranged on the upper layer. Between the glass and the lower glass; the metal layer is arranged on the top of the upper glass and the bottom of the lower glass; the metal layers are all arranged with slots, and the transmission structure corresponds to the slots; the transmission structure is arranged with an upper electrode and a lower electrode in the liquid crystal layer; wherein the upper electrode is located on the lower surface of the upper glass and corresponds to the slots; the lower electrode is located on the upper surface of the lower glass; a coupling component is arranged between the upper electrode and the lower electrode, and a liquid crystal layer is sandwiched; microstrip lines and resonant cavities are arranged in the upper non-glass dielectric layer and the lower non-glass dielectric layer; the microstrip lines and the resonant cavities correspond to the transmission structure. The liquid crystal phased array signal transmission device and the liquid crystal phased array antenna can realize good electromagnetic wave transmission between the glass medium and the non-glass medium, reduce the system loss of the liquid crystal phased array antenna, and have broadband performance.

[0021] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a liquid crystal phased array signal transmission device provided by an embodiment of the present invention;

[0025] Figure 2 A schematic structural diagram of a coupling device in a liquid crystal phased array signal transmission device provided by an embodiment of the present invention;

[0026] Figure 3A schematic structural diagram of a coupling device with a metal outer ring in a liquid crystal phased array signal transmission device provided by an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of a three-dimensional structure of a coupled input of a resonant cavity formed by a non-glass dielectric layer in a liquid crystal phased array signal transmission device provided by an embodiment of the present invention.

[0028] icon:

[0029] 10-glass panel layer; 20-liquid crystal layer; 30-metal layer; 40-transmission structure; 50-non-glass medium layer;

[0030] 11-upper glass; 12-lower glass;

[0031] 21-upper electrode; 22-lower electrode;

[0032] 41-first hook arm; 41a-first protrusion; 41b-first metal arm; 41c-surrounding metal layer;

[0033] 42-second hook arm; 42a-second protrusion; 42b-second metal arm;

[0034] 31-top metal stratum; 32-middle upper metal stratum; 33-middle lower metal stratum; 34-bottom metal stratum;

[0035] 51 - upper non-glass dielectric layer; 52 - lower non-glass dielectric layer; 53 - upper microstrip line; 54 - first metal via; 55 - lower microstrip line; 56 - second metal via. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the microwave frequency band, when phased array signal transmission devices transmit signals across two layers of substrates, it is usually necessary to use metal through holes to form a similar equivalent coaxial or waveguide structure because it is difficult to make a complete metal sidewall in a non-glass medium. However, when one of the layers is a glass plate and a through hole cannot be made or the cost of making a through hole is too high, it is easy to cause the transmission structure to generate lateral electromagnetic wave radiation, resulting in poor coupling effect and causing large losses during electromagnetic wave transmission. If the phased array system with a glass plate layer is also required to be broadband, then such a design is even more difficult to achieve; for example, in satellite communications, whether receiving or transmitting, it is hoped that the entire Ka or Ku band will be covered, and these bands are broadband. Existing liquid crystal phased array antennas, because they all use glass plate layers, their solutions are usually difficult to cover the required Ka or Ku operating frequency bands without causing huge losses and impedance mismatches.

[0038] In summary, the prior art lacks feasible implementation schemes when using devices such as liquid crystal phase shifters made of glass to realize the functions of phased array antennas. Based on this, the present invention provides a liquid crystal phased array signal transmission device and a liquid crystal phased array antenna, which can realize good electromagnetic wave transmission between glass medium and non-glass medium, reduce the system loss of liquid crystal phased array antennas, and have broadband performance.

[0039] To facilitate understanding of this embodiment, a liquid crystal phased array signal transmission device disclosed in an embodiment of the present invention is first described in detail. Figure 1 As shown in the structural schematic diagram, the liquid crystal phased array signal transmission device includes: a non-glass dielectric layer 50, a glass panel layer 10, a liquid crystal layer 20, and a metal layer 30; wherein a transmission structure 40 is arranged between the glass panel layer 10, the liquid crystal layer 20 and the metal layer 30.

[0040] Specifically, the non-glass dielectric layer 50 includes an upper non-glass dielectric layer 51 and a lower non-glass dielectric layer 52, and the 10 glass panel layer includes an upper glass 11 and a lower glass 12; the upper non-glass dielectric layer 51 is located above the upper glass 11, and the lower non-glass dielectric layer 52 is located below the lower glass 12; the liquid crystal layer 20 is arranged between the upper glass 11 and the lower glass 12.

[0041] The metal layer 30 is arranged on the top of the upper glass 11 and the bottom of the lower glass 12; the metal layer 30 is provided with grooves, and the transmission structure 40 corresponds to the grooves. The transmission structure 40 is provided with an upper electrode 21 and a lower electrode 22 in the liquid crystal layer 20; wherein the upper electrode 21 is located on the lower surface of the upper glass 11 and corresponds to the grooves; the lower electrode 22 is located on the upper surface of the lower glass; a coupling component is provided between the upper electrode 21 and the lower electrode 22, and the liquid crystal layer 20 is sandwiched.

[0042] Microstrip lines and resonant cavities are provided in the upper non-glass dielectric layer 51 and the lower non-glass dielectric layer 52; the microstrip lines and the resonant cavities both correspond to the transmission structure.

[0043] The liquid crystal phased array signal transmission device is a stacked sandwich structure cavity as a whole. By utilizing the slotted structure cavity, electromagnetic waves of different modes can be coupled to the dipole structure in the glass panel.

[0044] The structure diagram of the coupling component is as follows Figure 2 As shown, it includes a first hook arm 41 and a second hook arm 42; wherein the first hook arm 41 is located in the lower electrode 22, and a first dipole is arranged in the first hook arm 41; the second hook arm 42 is located in the upper electrode 21, and a second dipole is arranged in the second hook arm 42.

[0045] Optionally, the first hook arm 41 includes: a first protrusion 41a and a first metal arm 41b; wherein the cross-section of the first protrusion 41a is tower-shaped, the cross-section of the first metal arm 41b is L-shaped, and the first protrusion 41a is connected to the first metal arm 41b through the top of the tower.

[0046] Optionally, the second hook arm 42 includes: a second protrusion 42a and a second metal arm 42b; wherein the cross-section of the second protrusion 42a is a rectangle, the cross-section of the second metal arm 42b is an L-shape, and the second protrusion 42a is connected to the second metal arm 42b through one end of the rectangle.

[0047] Specifically, the coupling component includes two dipole hook-shaped arm structures, which are located on two different layers. Among them, the first hook-shaped arm 41 is located in the metal ground, that is, the lower electrode 22; the other second hook-shaped arm 42 is located in a symmetrical position of the upper electrode 21. In the vertical direction, there is a filling layer of liquid crystal material between the first hook-shaped arm 41 and the second hook-shaped arm 42, and there is an overlapping area in the middle of the structure. In this overlapping area, the dipole mode can be converted into a microstrip line mode with the help of the gradient structure on the lower electrode 22.

[0048] Optionally, the first hook arm also includes a surrounding metal layer 41c, which is a rectangular hole structure. The first protrusion 41a is connected to the surrounding metal layer 41c through the tower-shaped bottom, and the first protrusion 41a and the first metal arm 41b are both arranged in the surrounding metal layer 41c.

[0049] It is worth mentioning that the surrounding metal layer 41c can be selectively added by opening a rectangular groove in the metal ground of the lower electrode 22, as shown in FIG. Figure 3 As shown, the surrounding metal layer 41c as the outer ring metal is beneficial to control the lateral radiation of the dipole, and can be selectively optimized, removed, or retained according to actual needs.

[0050] Combination Figure 1 It can be seen that the resonant cavity surrounded by the first metal through hole 54 is inside the upper non-glass dielectric layer 51; the upper microstrip line 53 is located at a certain layer inside the upper non-glass dielectric layer 51, and the specific position can be adjusted according to the design. Similarly, the resonant cavity surrounded by the second metal through hole 56 is inside the lower non-glass dielectric layer 52; the lower microstrip line 55 is located at a certain layer inside the lower non-glass dielectric layer 52, and the specific position can also be adjusted according to the design.

[0051] Optionally, the metal layer 30 includes: a top metal layer 31, a middle upper metal layer 32, a middle lower metal layer 33 and a bottom metal layer 34; wherein the top metal layer 31 is arranged on the top of the upper non-glass dielectric layer 51; the middle upper metal layer 32 is arranged between the upper non-glass dielectric layer 51 and the upper glass 11; the middle lower metal layer 33 is arranged between the lower glass 12 and the lower non-glass dielectric layer 52; and the bottom metal layer 34 is arranged at the bottom of the lower non-glass dielectric layer 52.

[0052] At this time, the entire structure of the metal layer 30 is a multi-layer metal layer, which is respectively located at the top of the upper non-glass dielectric layer 51, between the upper non-glass dielectric layer 51 and the upper glass 11, between the lower glass 12 and the lower non-glass dielectric layer 52, and at the bottom of the lower non-glass dielectric layer 52. Among them, the metal layer between the non-glass dielectric layer 50 and the glass panel layer 10 has an H-shaped groove structure.

[0053] The liquid crystal phase shifter is excited by coupling the resonant cavity with a groove at the bottom in the upper non-glass dielectric layer 51 with the dipole structure in the liquid crystal layer 20. The structure can achieve broadband performance and good coupling performance. The dipole and hook arm structure in the liquid crystal layer 20 can couple and transmit different modes of the original signal, and finally convert the output signal into the transmission mode (TEM) of the microstrip line through the gradient structure.

[0054] refer to Figure 1 The first metal through hole 54 and the top metal layer 31 and the middle upper metal layer 32 in the metal layer 30 form a resonant cavity of the upper non-glass dielectric layer 51; the second metal through hole 56 and the middle lower metal layer 33 and the bottom metal layer 34 in the metal layer 30 form a resonant cavity of the lower non-glass dielectric layer 52, and the resonant region surrounded by the above metal through holes and the metal layers corresponds to the transmission structure. Figure 4The three-dimensional structure schematic diagram of the coupled input of the resonant cavity formed by the non-glass dielectric layer is shown, and the two dipole hook-shaped arm structures can be coupled through the slot structure on the upper metal ground. In the non-glass dielectric layer 50, there is an equivalent resonant cavity structure surrounded by metal vias and metal ground layers. A microstrip line probe structure is designed inside the metal layer 30 and the non-glass dielectric layer 50. The microstrip line probe structure is used to excite the slot in the cavity, and then the slot is coupled with the dipole structure in the glass panel surface layer to complete the electromagnetic wave transmission from the resonant cavity to the glass panel layer.

[0055] It can be seen from the liquid crystal phased array signal transmission device in the above embodiment that the liquid crystal phased array signal transmission device has a cavity with a slotted structure, which can couple electromagnetic waves of different modes to the dipole structure in the glass panel; the cavity structure is implemented on a substrate of a non-glass medium, and the side walls of the cavity are formed by metal through holes, and are closed by upper and lower metal ground structures; the slots are stimulated by a microstrip line probe extending into the cavity, so that the electromagnetic waves are effectively transmitted to the dipole structure.

[0056] In addition, the liquid crystal phased array signal transmission device adopts a dipole structure design, which includes two hook-shaped arms, one part of which is buried in the metal stratum; the other part is realized by the upper electrode and the lower electrode of the liquid crystal glass panel. The two arms of the dipole are separated by a small gap in the middle, but overlap in the center. The overlapping part can be used as a transmission area. Through this overlapping area with a gradual width, the original electromagnetic waves of different modes are converted into microstrip line modes and then output. Optionally, the microstrip line and resonant cavity structures in the two non-glass dielectric layers may not be exactly the same, subject to maximizing the transmission efficiency of the electromagnetic wave signal.

[0057] The coupling output structure of the resonant cavity and microstrip line formed by the lower non-glass medium is similar in principle and structure to the resonant cavity and microstrip line input structure formed by the upper non-glass medium, and will not be repeated here.

[0058] The glass panel layer and liquid crystal layer in the liquid crystal phased array signal transmission device adopt a sandwich structure, with the upper and lower layers being glass substrates with liquid crystal sandwiched in between; the metal layer is located on the inner surface of the glass substrate, and the transmission of electromagnetic waves is completed through the structure of these metal layers and the liquid crystals they contain, which can effectively optimize broadband performance and low-loss transmission.

[0059] The metal floor in the liquid crystal phased array signal transmission device can be selectively partially removed. In order to enhance the control of lateral radiation, the ground plane around the dipole can be partially or completely removed as needed. This optional removal can achieve more precise control of the radiation pattern and coupling efficiency.

[0060] An embodiment of the present invention further provides a liquid crystal phased array antenna, in which the liquid crystal phased array signal transmission device mentioned in the above embodiment is disposed.

[0061] The liquid crystal phased array antenna can achieve good electromagnetic wave transmission between a glass medium and a non-glass medium through a liquid crystal phased array signal transmission device provided therein, thereby reducing the system loss of the liquid crystal phased array antenna and having high bandwidth performance.

[0062] The liquid crystal phased array antenna provided in the embodiment of the present invention has a liquid crystal phased array signal transmission device provided therein, and the implementation principle and technical effect produced are the same as those in the aforementioned liquid crystal phased array signal transmission device embodiment. For the sake of brief description, for parts not mentioned in this embodiment, reference may be made to the corresponding contents in the aforementioned liquid crystal phased array signal transmission device embodiment.

[0063] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0064] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0065] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0066] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present invention can essentially or in other words, the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, electronic device, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0067] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A liquid crystal phased array signal transmission device, characterized in that: The liquid crystal phased array signal transmission device comprises: a non-glass dielectric layer, a glass panel layer, a liquid crystal layer and a metal layer; wherein a transmission structure is provided between the glass panel layer, the liquid crystal layer and the metal layer; The non-glass dielectric layer includes an upper non-glass dielectric layer and a lower non-glass dielectric layer, and the glass panel layer includes an upper glass layer and a lower glass layer; the upper non-glass dielectric layer is located above the upper glass layer, and the lower non-glass dielectric layer is located below the lower glass layer; the liquid crystal layer is arranged between the upper glass layer and the lower glass layer; The metal layer is arranged on the top of the upper glass and the bottom of the lower glass; the metal layer is provided with grooves, and the transmission structure corresponds to the grooves; The transmission structure is provided with an upper electrode and a lower electrode in the liquid crystal layer; wherein the upper electrode is located on the lower surface of the upper glass layer and corresponds to the groove; the lower electrode is located on the upper surface of the lower glass layer; a coupling component is provided between the upper electrode and the lower electrode, and the liquid crystal layer is sandwiched therebetween; Microstrip lines and resonant cavities are arranged in the upper non-glass dielectric layer and the lower non-glass dielectric layer; the microstrip lines and the resonant cavities both correspond to the transmission structure.

2. The liquid crystal phased array signal transmission device according to claim 1, characterized in that: The coupling component includes a first hook arm and a second hook arm; wherein the first hook arm is located in the lower electrode, and a first dipole is arranged in the first hook arm; the second hook arm is located in the upper electrode, and a second dipole is arranged in the second hook arm.

3. The liquid crystal phased array signal transmission device according to claim 2, characterized in that: The first hook-shaped arm includes: a first protrusion and a first metal arm; wherein the first protrusion is tower-shaped, the first metal arm is L-shaped, and the first protrusion is connected to the first metal arm through the top of the tower.

4. The liquid crystal phased array signal transmission device according to claim 2, characterized in that: The second hook-shaped arm includes: a second protrusion and a second metal arm; wherein the second protrusion is a rectangle, the second metal arm is L-shaped, and the second protrusion is connected to the second metal arm through one end of the rectangle.

5. The liquid crystal phased array signal transmission device according to claim 3, characterized in that: The first hook-shaped arm also includes a surrounding metal layer, which is a rectangular hole-shaped structure. The first protrusion is connected to the surrounding metal layer through the bottom of the tower shape. The first protrusion and the first metal arm are both arranged in the surrounding metal layer.

6. The liquid crystal phased array signal transmission device according to claim 1, characterized in that: The metal layer comprises: a top metal stratum, an upper middle metal stratum, a lower middle metal stratum and a bottom metal stratum; Wherein, the top metal layer is arranged on top of the upper non-glass dielectric layer; The middle upper metal layer is disposed between the upper glass layer and the upper non-glass dielectric layer; The middle and lower metal layer is disposed between the lower glass layer and the lower non-glass dielectric layer; The bottom metal layer is disposed at the bottom of the lower non-glass dielectric layer.

7. The liquid crystal phased array signal transmission device according to claim 1, characterized in that: The resonant cavity is composed of a plurality of metal through holes connected to the metal layer, and the resonant region surrounded by the metal through holes corresponds to the transmission structure.

8. A phased array antenna, characterized in that: The phased array antenna is provided with a liquid crystal phased array signal transmission device as claimed in any one of claims 1 to 7.

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