Transparent antireflection film layer and patch antenna structure

Abstract

The embodiment of the present application provides a transparent anti-reflection film layer and a patch antenna structure. The transparent anti-reflection film layer comprises a plurality of anti-reflection modules; the plurality of anti-reflection modules are arranged according to a preset array, wherein the preset array is an array required when the transparent anti-reflection film layer reaches a preset frequency band; each anti-reflection module comprises a plurality of closed annular films and a metal grid which are centrally symmetrically distributed, the symmetric center of the plurality of closed annular films is a center point of the anti-reflection module; the edge positions of each two adjacent closed annular films are connected, and the plurality of closed annular films enclose a closed cavity, and the metal grid is filled in the closed cavity, wherein the closed annular film is a transparent structure. In this way, through the transparent anti-reflection film layer, not only the normal light transmission of light can be ensured, but also when the transparent anti-reflection film layer is placed on one side of an external radiating element, the signal strength received and transmitted by the external radiating element can be effectively increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of signal equipment, and in particular relates to a transparent anti-reflection film layer and a patch antenna structure. BACKGROUND

[0002] With the continuous development of 5G mobile communication technology, in order to realize higher speed and lower delay communication quality, the base station end also gradually begins to update to higher frequency iteration. With the increase of the frequency of the base station end, the path loss of the electromagnetic signal becomes larger, which greatly affects the propagation distance of the electromagnetic signal. In order to make up for the propagation distance of the electromagnetic signal, it is usually necessary to improve the gain of the antenna of the base station end to improve the signal propagation distance.

[0003] However, with the development of building integration, since the transparent antenna is applied to the glass skylight of the building outer wall, how to improve the gain of the transparent antenna without affecting the light transmission has become a technical problem to be solved. SUMMARY

[0004] The present application provides a transparent anti-reflection film layer and a patch antenna structure to solve the problem that the antenna cannot improve the gain of the transparent antenna without affecting the light transmission in the prior art.

[0005] To solve the above technical problems, the present application is implemented as follows:

[0006] In a first aspect, the present application provides a transparent anti-reflection film layer, which comprises a plurality of anti-reflection modules.

[0007] The plurality of anti-reflection modules are arranged according to a preset array, wherein the preset array is an array required for the transparent anti-reflection film layer to reach a preset frequency band.

[0008] Each anti-reflection module comprises a plurality of center-symmetrically distributed closed ring films and a metal mesh, and the symmetry center of the plurality of closed ring films is the center point of the anti-reflection module.

[0009] The edges of each adjacent two closed ring films are connected, and the plurality of closed ring films enclose a closed cavity, and the metal mesh is filled in the closed cavity, wherein the closed ring film is a transparent structure.

[0010] Optionally, the plurality of closed ring films comprise a first open ring film, a second open ring film, a third open ring film and a fourth open ring film.

[0011] The first open ring film, the second open ring film, the third open ring film and the fourth open ring film each comprise an outer ring and an inner ring, and the inner ring is located in the outer ring.

[0012] The outer ring of the first open ring film, the outer ring of the second open ring film, the outer ring of the third open ring film and the outer ring of the fourth open ring film are connected to each other;

[0013] The outer ring and the inner ring are filled with the metal mesh.

[0014] Optionally, the first open ring film, the second open ring film, the third open ring film and the fourth open ring film are all in a triangular ring structure.

[0015] Optionally, the metal mesh comprises a plurality of interwoven metal wires.

[0016] The thickness of the metal wire is greater than or equal to 1 micrometer and less than or equal to 10 micrometers, and the line width of the metal wire is greater than or equal to 2 micrometers and less than or equal to 10 micrometers, wherein the thickness is the dimension of the metal wire in the direction perpendicular to the surface of the anti-reflection film layer, and the line width is the dimension of the metal wire in the direction parallel to the surface of the anti-reflection film layer.

[0017] The spacing between every two adjacent metal wires is greater than or equal to 50 micrometers and less than or equal to 250 micrometers.

[0018] Optionally, the preset array is a 5x5 rectangular array.

[0019] Optionally, the anti-reflection film layer is a polyethylene terephthalate film.

[0020] Optionally, each of the anti-reflection modules is in a square sheet structure, and the side length of each of the anti-reflection modules is 0.23 times the center frequency point wavelength.

[0021] In a second aspect, the embodiments of the present application further provide a patch antenna structure, which comprises the transparent anti-reflection film layer of any one of the first aspect.

[0022] The antenna and the anti-reflection film layer are spaced apart.

[0023] Optionally, the spacing between the antenna and the transparent anti-reflection film layer is greater than or equal to 0.23 times the center frequency point wavelength and less than or equal to 0.75 times the center frequency point wavelength.

[0024] Optionally, the number of layers of the transparent anti-reflection film layer is greater than or equal to 2, and a plurality of the transparent anti-reflection film layers are stacked.

[0025] In the embodiment of the present application, since the transparent anti-reflection film layer comprises a plurality of anti-reflection modules, the plurality of anti-reflection modules are arranged according to a preset array, each anti-reflection module comprises a plurality of closed annular films and metal grids which are centrally symmetrically distributed, the closed annular film is a transparent structure, so that the light transmittance of the transparent anti-reflection film can be ensured through the metal grid and the closed annular film, and since the plurality of closed annular films are centrally symmetrically distributed with the center point of the anti-reflection module as the center, when the transparent anti-reflection film layer is placed on one side of the external radiation element, the plurality of closed annular films can be used as a resonant structure, thereby converging the beam emitted by the external radiation element to the center point of the anti-reflection film layer, thereby improving the gain of the external radiation element and enhancing the signal strength received and transmitted by the external radiation element. In summary, the transparent anti-reflection film layer provided in the embodiment of the present application not only ensures the normal light transmission of light, but also effectively increases the signal strength received and transmitted by the external radiation element when the transparent anti-reflection film layer is placed on one side of the external radiation element. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0027] Figure 1 FIG. 1 shows a structure schematic diagram of a transparent anti-reflection film layer provided in an embodiment of the present application;

[0028] Figure 2 FIG. 2 shows a structure schematic diagram of a first anti-reflection module provided in an embodiment of the present application;

[0029] Figure 3 FIG. 3 shows a structure schematic diagram of a second anti-reflection module provided in an embodiment of the present application;

[0030] Figure 4 FIG. 4 shows a structure schematic diagram of a third anti-reflection module provided in an embodiment of the present application;

[0031] Figure 5 FIG. 5 shows a partial enlarged schematic diagram of the anti-reflection module in the embodiment of the present application at position A; Figure 2

[0032] Figure 6 FIG. 6 shows a structure schematic diagram of a patch antenna provided in an embodiment of the present application;

[0033] Figure 7 FIG. 7 shows a transmission and reflection coefficient schematic diagram of the transparent anti-reflection film layer provided in an embodiment of the present application;

[0034] Figure 8 ​A schematic diagram showing the phase difference between the incident wave and the transmitted wave on the transparent anti-reflection film provided by the embodiment of the present application;

[0035] Figure 9 A schematic diagram showing the change of the fluctuation frequency of the antenna provided by the embodiment of the present application with the return loss;

[0036] Figure 10 A schematic diagram showing the radiation pattern of the antenna provided by the embodiment of the present application at the center frequency point;

[0037] Figure 11 A schematic diagram showing the change of the fluctuation frequency of the patch antenna structure provided by the embodiment of the present application with the return loss;

[0038] Figure 12 A schematic diagram showing the radiation pattern of the patch antenna structure provided by the embodiment of the present application at the center frequency point;

[0039] Figure 13 A schematic diagram showing the change of the fluctuation frequency of the patch antenna structure provided by the embodiment of the present application with the return loss when applied to the glass window;

[0040] Figure 14 A schematic diagram showing the radiation pattern of the patch antenna structure provided by the embodiment of the present application at the center frequency point when applied to the glass window.

[0041] Reference signs:

[0042] 1: transparent anti-reflection film layer; 2: antenna; 10: anti-reflection module; 11: closed ring film; 12: metal mesh; 111: first open ring film; 112: second open ring film; 113: third open ring film; 114: fourth open ring film; 121: metal wire; 1111: outer ring; 1112: inner ring. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0045] In a first aspect, embodiments of the present application provide a transparent anti-reflection film layer, Figure 1 Fig. 1 shows a schematic diagram of a structure of a transparent anti-reflection film layer provided by an embodiment of the present application, Figure 2 Fig. 2 shows a schematic diagram of a structure of a first anti-reflection module provided by an embodiment of the present application, Figure 3 Fig. 3 shows a schematic diagram of a structure of a second anti-reflection module provided by an embodiment of the present application, Figure 4 Fig. 4 shows a schematic diagram of a structure of a third anti-reflection module provided by an embodiment of the present application, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the transparent anti-reflection film layer comprises a plurality of anti-reflection modules 10; the plurality of anti-reflection modules 10 are arranged according to a preset array, wherein the preset array is an array required for the transparent anti-reflection film layer to reach a preset frequency band; each anti-reflection module 10 comprises a plurality of closed annular films 11 and a metal mesh 12, which are centrally symmetrically distributed, the center of symmetry of the plurality of closed annular films 11 is the center point of the anti-reflection module 10; the edges of each adjacent two closed annular films 11 are connected, and the plurality of closed annular films 11 enclose a closed cavity, and the metal mesh 12 is filled in the closed cavity, wherein the closed annular film 11 is a transparent structure.

[0046] The plurality of anti-reflection modules 10 are arranged according to the preset array to form a sheet structure, and the preset array is determined according to the number of anti-reflection modules 10 required for the transparent anti-reflection film layer to reach the preset frequency band, which is not limited in the embodiments of the present application. For example, as shown in Figure 1 , when the preset array is a rectangular array of 5 rows and 5 columns, the frequency band of the transparent anti-reflection film layer is located at 2450MHz to 2550MHz.

[0047] Each anti-reflection module 10 can comprise an anti-reflection film layer and a metal mesh 12, and the anti-reflection film layer can comprise a plurality of closed annular films 11 which are centrally symmetrically distributed. In the embodiments of the present application, the closed annular films 11 can be three, four or any other number. The shape of the closed annular film 11 can be a closed annular structure of any shape such as a triangular open ring, a rhombic open ring, etc., and the number and shape of the closed annular film 11 are not limited in the embodiments of the present application. For example, the closed annular film 11 provided by the embodiments of the present application can have a shape as shown in Figure 2 , or a shape as shown in Figure 3 , and the number of closed annular films 11 included in each anti-reflection film layer can be four as shown in Figure 4 , or six as shown in

[0048] It should be noted that, since the anti-reflection film layer includes a plurality of closed annular films 11 that are centrally symmetrically distributed, and the symmetry center of the plurality of closed annular films 11 is the center point of the anti-reflection module 10, when the anti-reflection module 10 is placed on one side of the external radiation element, the plurality of closed annular films 11 can be used as a resonant structure, thereby converging the beam emitted by the external radiation element to the center point of the anti-reflection film layer, thereby improving the gain of the external radiation element and enhancing the signal strength received and transmitted by the external radiation element.

[0049] The metal mesh 12 can be filled in the closed cavity surrounded by the plurality of closed annular films 11 through a metal line etching or an imprinting process, so that the light transmittance of the metal mesh 12 can reach 70% to 88%. In the embodiment of the present application, the metal mesh 12 can be used as a resonant element of the anti-reflection module 10, which can improve the gain of the external radiation element and enhance the signal strength received and transmitted by the external radiation element while ensuring the light transmittance.

[0050] As can be seen from the above embodiment, in the embodiment of the present application, the transparent anti-reflection film layer includes a plurality of anti-reflection modules 10, the plurality of anti-reflection modules 10 are arranged according to a preset array, each anti-reflection module 10 includes a plurality of closed annular films 11 that are centrally symmetrically distributed and a metal mesh 12, the closed annular film 11 is a transparent structure, so that the light transmittance of the transparent anti-reflection film can be ensured through the metal mesh 12 and the closed annular film 11, and since the plurality of closed annular films 11 are centrally symmetrically distributed with the center point of the anti-reflection module 10 as the symmetry center, when the transparent anti-reflection film layer is placed on one side of the external radiation element, the plurality of closed annular films 11 can be used as a resonant structure, thereby converging the beam emitted by the external radiation element to the center point of the anti-reflection film layer, thereby improving the gain of the external radiation element and enhancing the signal strength received and transmitted by the external radiation element. In summary, the transparent anti-reflection film layer provided in the embodiment of the present application not only can ensure the normal light transmittance of light, but also can effectively increase the signal strength received and transmitted by the external radiation element when the transparent anti-reflection film layer is placed on one side of the external radiation element.

[0051] In some embodiments, as Figure 2As shown, the plurality of closed annular films 11, the first open annular film 111, the second open annular film 112, the third open annular film 113 and the fourth open annular film 114; the first open annular film 111, the second open annular film 112, the third open annular film 113 and the fourth open annular film 114 all include an outer ring 1111 and an inner ring 1112, and the inner ring 1112 is located in the outer ring 1111; the outer ring 1111 of the first open annular film 111, the outer ring 1111 of the second open annular film 112, the outer ring of the third open annular film 113 and the outer ring 1111 of the fourth open annular film 114 are connected with each other; the outer ring 1111 and the inner ring 1112, and the cavity of the inner ring 1112 are filled with a metal mesh 12.

[0052] It should be noted that the first open annular film 111, the second open annular film 112, the third open annular film 113 and the fourth open annular film 114 are all closed annular structures, and the outer ring 1111 of the first open annular film 111, the outer ring 1111 of the second open annular film 112, the outer ring 1111 of the third open annular film 113 and the outer ring 1111 of the fourth open annular film 114 are connected with each other. Specifically, the outer ring 1111 of the first open annular film 111 is connected with the outer ring 1111 of the second open annular film 112 and the outer ring 1111 of the third open annular film 113, and the outer ring 1111 of the second open annular film 112 and the outer ring 1111 of the third open annular film 113 are connected with the outer ring 1111 of the fourth open annular film 114. In this way, the outer ring 1111 can form a closed annular structure by connecting the outer ring 1111 of the second open annular film 112, the outer ring 1111 of the second open annular film 112, the outer ring 1111 of the third open annular film 113 and the outer ring 1111 of the fourth open annular film 114. Since the first open annular film 111, the second open annular film 112, the third open annular film 113 and the fourth open annular film 114 are distributed symmetrically with the center point of the anti-reflection module 10 as the center, the inner ring 1112 located in each outer ring 1111 is distributed around the center point of the anti-reflection module 10. In this way, when the metal mesh 12 is filled between the outer ring 1111 and the inner ring 1112 and in the cavity of the inner ring 1112, the distribution of the metal mesh 12 is more uniform, which is more conducive to maintaining the light transmittance of the anti-reflection module 10.

[0053] Optionally, the first open annular film 111, the second open annular film 112, the third open annular film 113 and the fourth open annular film 114 are all triangular annular structures.

[0054] Specifically, two waist edges of the outer ring 1111 of the first open ring film 111 are connected with one of the two waist edges of the outer ring 1111 of the adjacent second open ring film 112 and one of the two waist edges of the outer ring 1111 of the third open ring film 113 respectively, and the other of the two waist edges of the outer ring 1111 of the second open ring film 112 and one of the two waist edges of the outer ring 1111 of the third open ring film 113 are connected with the two waist edges of the outer ring 1111 of the fourth open ring film 114 respectively. In this way, the vertex of the outer ring 1111 of the first open ring film 111, the vertex of the outer ring 1111 of the second open ring film 112, the vertex of the outer ring 1111 of the third open ring film 113 and the vertex of the outer ring 1111 of the fourth open ring film 114 are located at the center point of the anti-reflection module 10, and the bottom edge of the outer ring 1111 of the first open ring film 111, the bottom edge of the outer ring 1111 of the second open ring film 112, the bottom edge of the outer ring 1111 of the third open ring film 113 and the bottom edge of the outer ring 1111 of the fourth open ring film 114 form a square structure, so that the structure of each anti-reflection module 10 is more regular, and the splicing between the plurality of anti-reflection modules 10 is more convenient.

[0055] Optionally, the anti-reflection film layer is a polyethylene terephthalate film.

[0056] It should be noted that the polyethylene terephthalate film is prepared by dimethyl terephthalate and ethylene glycol ester exchange or by synthesizing bis-hydroxyethyl terephthalate through terephthalic acid and ethylene glycol esterification, and then performing polycondensation reaction, so that the anti-reflection film layer has a light transmittance of 90% and a certain flexibility, is easily attached to the surface flat transparent plate layer, and is more convenient to install and operate when used with other transparent plate layers. At the same time, the polyethylene terephthalate film has good mechanical properties, the impact strength is 3 to 5 times that of other films, and the folding resistance is good, so that the anti-reflection film layer can improve the loss of the anti-reflection module 10 during manufacturing and improve the service life of the transparent anti-reflection film layer.

[0057] Optionally, each anti-reflection module 10 is a square sheet structure, and the side length of each anti-reflection module 10 is 0.23 times the center frequency wavelength. In this way, the transmission and reflection coefficients of the anti-reflection film can be improved, as shown in Figure 7 As shown in the figure, the transparent anti-reflection film provided by the embodiment of the present application can realize a transmission loss of less than 1dB and a return loss of more than 15dB within the working frequency. The transmission loss is less than 0.58dB and the return loss is greater than 23.8dB under the center frequency band. Among them, Figure 7 The dashed line in the figure represents the projection coefficient curve, Figure 7 The solid line in the figure represents the reflection coefficient curve.

[0058] It should be further noted that the metal mesh 12 has the following parameter requirements: as shown inFigure 5 As shown, the metal mesh 12 includes a plurality of interlaced metal wires 121; the thickness d of the metal wires 121 is greater than or equal to 1 micrometer and less than or equal to 10 micrometers, and the line width m of the metal wires 121 is greater than or equal to 2 micrometers and less than or equal to 10 micrometers, where the thickness d is the dimension of the metal wires 121 in the direction perpendicular to the surface of the anti-reflection film layer, and the line width m is the dimension of the metal wires 121 in the direction parallel to the surface of the anti-reflection film layer; the distance between every two adjacent metal wires 121 is greater than or equal to 50 micrometers and less than or equal to 250 micrometers. In this way, by controlling the parameters of the metal mesh 12 as described above, the light transmittance of the metal mesh 12 can be ensured to be greater than or equal to 70%, thereby avoiding the influence of the arrangement of the metal mesh 12 on the light transmission.

[0059] As can be seen from the above embodiments, in the embodiments of the present application, the transparent anti-reflection film layer includes a plurality of anti-reflection modules 10, the plurality of anti-reflection modules 10 are arranged according to a preset array, each anti-reflection module 10 includes a plurality of closed annular films 11 and metal meshes 12 which are centrally symmetrically distributed, the closed annular film 11 is a transparent structure, so that the light transmittance of the transparent anti-reflection film can be ensured by the metal mesh 12 and the closed annular film 11, and since the plurality of closed annular films 11 are centrally symmetrically distributed with the center point of the anti-reflection module 10 as the center, when the transparent anti-reflection film layer is placed on one side of the external radiating element, the plurality of closed annular films 11 can act as a resonant structure, thereby converging the beams emitted by the external radiating element to the center point of the anti-reflection film layer, thereby improving the gain of the external radiating element and enhancing the signal strength received and transmitted by the external radiating element. In summary, the transparent anti-reflection film layer provided by the embodiments of the present application not only ensures the normal light transmission of light, but also effectively increases the signal strength received and transmitted by the external radiating element when the transparent anti-reflection film layer is placed on one side of the external radiating element.

[0060] In a second aspect, as Figure 6 As shown, the present application also provides a patch antenna structure, which includes an antenna 2 and the transparent anti-reflection film layer 111 of any one of the embodiments of the first aspect, and the antenna 2 and the transparent anti-reflection film layer 111 are arranged with a spacing therebetween.

[0061] It should be noted that in actual application, the transparent antireflection film layer 111 can be attached to the surface of the transparent device, such as the surface of the transparent glass window. In this way, since the transparent antireflection film layer 111 comprises a plurality of antireflection modules 10, the plurality of antireflection modules 10 are arranged in a preset array, each antireflection module 10 comprises a plurality of closed annular films 11 and metal meshes 12 which are centrally symmetrically distributed, the closed annular film 11 is transparent, so that the light transmittance of the transparent antireflection film can be ensured through the metal mesh 12 and the closed annular film 11, and since the plurality of closed annular films 11 are centrally symmetrically distributed with the center point of the antireflection module 10 as the center, when the transparent antireflection film layer 111 is placed on one side of the antenna 2, the plurality of closed annular films 11 can be used as a resonant structure, thereby converging the beam emitted by the antenna 2 to the center point of the antireflection film layer, thereby improving the gain of the antenna 2 and enhancing the signal strength received and transmitted by the antenna 2. In summary, the patch antenna structure provided by the embodiment of the present application can enhance the signal without the need to increase the number of antenna 2 units or change the overall structure of the antenna 2, but only by adding the transparent antireflection film layer 111, the signal of the antenna 2 can be enhanced, thereby reducing the manufacturing cost of the patch antenna structure, facilitating operation and installation.

[0062] It should also be noted that, as shown in Figure 9 , the fluctuation frequency of the patch antenna 2 under the standard of return loss of-10dB can meet 2470MHz-2530MHz, and the center frequency is 2500MHz, wherein, Figure 9 The abscissa in the above figure represents the fluctuation frequency, and the ordinate represents the numerical value of the return loss. As shown in Figure 10 , the fluctuation frequency of the antenna 2 has a gain characteristic of 3.3dBi under the condition of 2500MHz. As shown in Figure 11 , the transparent antireflection film will cause a slight frequency shift after being added to the antenna 2, but it does not affect the normal use of the center frequency. Wherein, Figure 11 The abscissa in the above figure represents the fluctuation frequency, and the ordinate represents the numerical value of the return loss. The dashed line represents the change of the fluctuation frequency of the antenna 2 with the return loss, and the solid line represents the change of the fluctuation frequency of the antenna 2 with the return loss after adding the transparent antireflection film layer 111. As shown in Figure 12 , the introduction of the transparent antireflection film improves the gain of the patch antenna 2, and the gain of the patch antenna 2 under the center frequency can reach 5.5dBi. Further, as shown in Figure 13 , in the case that the patch antenna 2 is attached to the transparent glass window, the transparent glass window still does not affect the normal use of the center frequency. Wherein, Figure 13The horizontal axis in the figure represents the fluctuation frequency, the vertical axis represents the value of the return loss, the dotted line represents the fluctuation frequency of the antenna 2 with the change of the return loss, the dotted line represents the fluctuation frequency of the antenna 2 with the transparent anti-reflection film layer 111 with the change of the return loss, and the solid line represents the fluctuation frequency of the patch antenna 2 attached to the transparent glass window with the change of the return loss. Figure 14 It is shown that the gain of the patch antenna 2 at the center frequency is 4.4dBi when the patch antenna 2 is attached to the transparent glass window. In summary, whether the transparent anti-reflection film layer 111 is added on one side of the antenna 2 or attached to the transparent glass window, the normal use of the center frequency will not be affected, and the gain of the patch antenna 2 can be increased.

[0063] Optionally, the distance between the antenna 2 and the transparent anti-reflection film layer 111 is greater than or equal to 0.23 times the wavelength of the center frequency point and less than or equal to 0.75 times the wavelength of the center frequency point.

[0064] It should be noted that, as shown in Figure 8 when the distance between the antenna 2 and the transparent anti-reflection film layer 111 is greater than or equal to 0.23 times the wavelength of the center frequency point and less than or equal to 0.75 times the wavelength of the center frequency point, the phase change range of the incident wave on the transparent anti-reflection film is between -7° and +7°, so that the center frequency phase difference is close to 0°, and the transparent anti-reflection film layer 111 has good anti-reflection effect.

[0065] In some embodiments, the number of layers of the transparent anti-reflection film layer 111 is greater than or equal to 2, and the transparent anti-reflection film layer 111 is stacked. That is, the patch antenna 2 can use multiple layers of transparent anti-reflection film layer 111, and the multiple layers of transparent anti-reflection film layer 111 are stacked to further increase the gain of the patch antenna structure.

[0066] As can be seen from the above embodiments, in the embodiments of the present application, the transparent anti-reflection film layer 111 comprises a plurality of anti-reflection modules 10, the plurality of anti-reflection modules 10 are arranged according to a preset array, each anti-reflection module 10 comprises a plurality of closed annular films 11 and metal meshes 12 which are centrally symmetrically distributed, the closed annular film 11 is a transparent structure, so that the light transmittance of the transparent anti-reflection film can be ensured through the metal mesh 12 and the closed annular film 11, and because the plurality of closed annular films 11 are centrally symmetrically distributed with the center point of the anti-reflection module 10 as the center, when the transparent anti-reflection film layer 111 is placed on one side of the antenna 2, the plurality of closed annular films 11 can be used as a resonant structure, thereby converging the beam emitted by the antenna 2 to the center point of the anti-reflection film layer, and thereby improving the gain of the antenna 2 and enhancing the signal strength received and transmitted by the antenna 2. In this way, the patch antenna structure provided by the embodiments of the present application does not need to increase the number of antenna 2 units or change the overall structure of the antenna 2 when enhancing the signal, but can realize the enhancement of the signal of the antenna 2 by only increasing the transparent anti-reflection film layer 111, so as to reduce the manufacturing cost of the patch antenna structure while facilitating operation and installation.

[0067] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be mutually referred to.

[0068] Although alternative embodiments of the embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to cover all alternative embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

[0069] Finally, it should also be noted that in this document, relationship terms such as first and second are used only to distinguish one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between the entities. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such article or terminal device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the article or terminal device including the element.

[0070] The technical solutions provided by the present application are described in detail above, and the principles and implementation manners of the present application are described by using specific examples. Meanwhile, for those skilled in the art, the principles and implementation manners of the present application can be changed in specific implementation manners and application ranges, and therefore, the content of the present description should not be understood as a limitation on the present application.

Claims

1. A transparent antireflective film layer, characterized by, The transparent antireflection film layer comprises a plurality of antireflection modules; The plurality of antireflection modules are arranged according to a preset array, wherein the preset array is an array required for the transparent antireflection film layer to reach a preset frequency band; Each of the antireflection modules comprises a plurality of closed annular films and a metal mesh, which are symmetrically distributed, and the symmetry center of the plurality of closed annular films is the center point of the antireflection module; The edge positions of each two adjacent closed annular films are connected, and the plurality of closed annular films enclose a closed cavity, and the metal mesh is filled in the closed cavity, wherein the closed annular film is a transparent structure; The plurality of closed annular films comprise a first open annular film, a second open annular film, a third open annular film and a fourth open annular film; The first open annular film, the second open annular film, the third open annular film and the fourth open annular film are all triangular ring structures; The first open annular film, the second open annular film, the third open annular film and the fourth open annular film all comprise an outer ring and an inner ring, and the inner ring is located in the outer ring; The outer rings of the first open annular film, the second open annular film, the third open annular film and the fourth open annular film are connected to each other; The metal mesh is filled between the outer ring and the inner ring and in the inner ring cavity.

2. The transparent antireflection film layer according to claim 1, wherein The metal mesh comprises a plurality of interwoven metal wires; The thickness of the metal wire is greater than or equal to 1 micrometer and less than or equal to 10 micrometers, and the line width of the metal wire is greater than or equal to 2 micrometers and less than or equal to 10 micrometers, wherein the thickness is the dimension of the metal wire in the direction perpendicular to the surface of the antireflection film layer, and the line width is the dimension of the metal wire in the direction parallel to the surface of the antireflection film layer; The spacing between each two adjacent metal wires is greater than or equal to 50 micrometers and less than or equal to 250 micrometers.

3. The transparent antireflection film layer according to claim 1, wherein The preset array is a 5x5 rectangular array.

4. The transparent antireflection film layer according to claim 1, wherein The antireflection film layer is a polyethylene terephthalate film.

5. The transparent antireflection film layer according to claim 1, wherein Each of the antireflection modules is a square sheet structure, and the side length of each of the antireflection modules is 0.23 times the center frequency point wavelength.

6. A patch antenna structure, characterized by The patch antenna structure comprises an antenna and the transparent antireflection film layer of any one of claims 1-5; The antenna and the antireflection film layer are arranged with a spacing therebetween.

7. The patch antenna structure of claim 6, wherein, The spacing between the antenna and the transparent antireflection film layer is greater than or equal to 0.23 times the center frequency point wavelength and less than or equal to 0.75 times the center frequency point wavelength.

8. The patch antenna structure of claim 6, wherein, The number of layers of the transparent antireflection film layer is greater than or equal to 2, and a plurality of the transparent antireflection film layers are stacked.

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