A low-carbon glass with signal enhancement and a preparation method and application thereof

Abstract

This invention discloses a signal-enhancing low-carbon glass, belonging to the field of low-carbon glass technology. The low-carbon glass includes a glass substrate and a low-emissivity coating on the surface of the glass substrate. Signal enhancement units are disposed on the low-emissivity coating, and each signal enhancement unit consists of at least one periodically arranged butterfly-shaped unit. The butterfly-shaped unit is formed by continuous or discontinuous coating removal trajectories. The butterfly-shaped unit can generate resonant transmission channels in the sub-6 GHz and 5 GHz millimeter-wave bands, achieving high signal transmission characteristics. The butterfly-wing structure of the butterfly-shaped unit can increase the capacitive coupling between the signal enhancement units, enabling stable response over a wider frequency band. This allows the low-carbon glass to significantly enhance its transmission capability for sub-6 GHz and 5 GHz millimeter-wave signals while maintaining excellent visible light transmittance and low infrared emission performance, thereby effectively improving the wireless communication environment within buildings.

Description

Technical Field

[0001] This invention relates to the field of low-carbon glass technology, and in particular to a low-carbon glass for signal enhancement, its preparation method, and its application. Background Technology

[0002] Low-carbon glass, also known as energy-saving glass or low-emissivity glass (Low-E glass), typically consists of a transparent glass substrate and one or more layers of metallic insulating film (Low-E coating) on ​​its surface. This coating effectively reflects far-infrared radiation and reduces ultraviolet transmission, thereby reducing building energy consumption and improving indoor thermal comfort. Therefore, it is widely used in energy-efficient building doors, windows, and curtain wall systems.

[0003] Low-E coatings are generally made of silver (Ag) and its composite metal oxide systems, and have excellent low emissivity and high visible light transmittance.

[0004] However, the shielding effect of Low-E coatings on electromagnetic waves is not limited to the infrared band; they also significantly attenuate microwave and millimeter-wave signals. When external wireless signals (such as Wi-Fi, 4G, and 5G) penetrate this type of glass, their energy is reflected or absorbed by the metal layer, resulting in a significant decrease in signal strength. Experimental and simulation studies show that typical Low-E glass can attenuate sub-6GHz signals (frequency range 0.5GHz~6GHz) and 5G millimeter-wave signals (frequency range approximately 24GHz~40GHz) by 25dB~50dB, severely impacting indoor and outdoor signal transmission quality.

[0005] Existing improvement solutions mainly include: reducing the thickness of the metal layer, adjusting the film stacking structure, or introducing periodic etching patterns (such as square holes, round holes, or grid structures) on the glass surface to improve transmission in specific frequency bands. However, these solutions often suffer from problems such as simple pattern shapes, limited design freedom, and limited transmission improvement, making it difficult to achieve efficient millimeter-wave signal transmission while ensuring visible light transmittance and low infrared emission performance.

[0006] Therefore, how to significantly enhance the transmission capability of Low-E glass to sub-6G signals and 5G millimeter-wave signals while maintaining energy-saving performance has become a key technical problem that urgently needs to be solved in the field of glass and electromagnetic materials. Summary of the Invention

[0007] The main objective of this invention is to provide a method for preparing and applying low-carbon glass for signal enhancement, thereby solving the technical problem that low-carbon glass is difficult to enhance the transmission capability of wireless signals while ensuring visible light transmittance and low infrared emission performance.

[0008] To achieve the above objectives, the present invention provides a low-carbon glass for signal enhancement, the low-carbon glass comprising a glass substrate and a low-emissivity coating disposed on the surface of the glass substrate, the low-emissivity coating being provided with a signal enhancement unit, the signal enhancement unit being composed of at least one or more periodically arranged butterfly-shaped units, the butterfly-shaped units being composed of continuous or discontinuous coating removal trajectories.

[0009] In some embodiments of the present invention, the coating removal trajectory includes at least one of a straight line, a broken line, and a curve.

[0010] In some embodiments of the present invention, the butterfly-shaped unit is a symmetrical pattern.

[0011] In some embodiments of the present invention, the butterfly-shaped unit includes a central pattern formed by the decoating trajectory and four peripheral patterns respectively connected to the outer contour of the central pattern.

[0012] The four peripheral graphics are the first peripheral graphic, the second peripheral graphic, the third peripheral graphic, and the fourth peripheral graphic.

[0013] The XY coordinate axis is constructed with the center of the central graphic as the origin. The first, second, third, and fourth outer peripheral graphics are distributed in the first, second, third, and fourth quadrants, respectively.

[0014] After the first outer peripheral graphic is rotated 90°, 180°, and 270° around the origin on the same plane, it overlaps with the second, third, and fourth outer peripheral graphics, respectively.

[0015] In some embodiments of the present invention, the central graphic is surrounded by the decoating trajectory, and the central graphic includes one or more overlapping graphics such as a circle, ellipse, rectangle, polygon, heart, or star.

[0016] In some embodiments of the present invention, the outer edge of the outer contour of the central graphic is provided with n decoating protrusions, where n is an integer greater than 0.

[0017] In some embodiments of the present invention, the central graphic is a rectangle, and the outer edges of the four corners of the rectangle are provided with the coating removal protrusions.

[0018] In some embodiments of the present invention, the peripheral pattern includes at least two decoating trajectories A1A2 and B1B2, which are determined from the outer contour of the central pattern, with starting points A1 and B1 respectively, and extending outward from A1 and B1 to the outer periphery of the outer contour. A1 and B1 do not overlap, and A1A2 and B1B2 have at least one intersection point.

[0019] In some embodiments of the present invention, A1A2 and B1B2 intersect to form an included angle N toward the central figure, wherein the included angle N is an acute angle or a right angle.

[0020] In some embodiments of the present invention, A1A2 includes a straight line trajectory and a polyline trajectory, and B1B2 includes a straight line trajectory and a polyline trajectory.

[0021] In some embodiments of the present invention, the width of the decoating trajectory is 25 μm to 100 μm.

[0022] In some embodiments of the present invention, the periodic space size T of the butterfly-shaped unit is 1mm to 100mm.

[0023] In some embodiments of the present invention, when the width of the decoating trajectory is w μm, the periodic space size T of the butterfly-shaped unit is (w / 10) mm to (w / 50) mm.

[0024] In some embodiments of the present invention, the low-carbon glass further includes a hollow layer disposed between the two glass substrates, and the low-emissivity coating is disposed on the surface of at least one of the glass substrates facing the hollow layer.

[0025] In some embodiments of the present invention, the spatial width of the hollow layer is 6mm to 16mm; and / or, the thickness of the glass substrate is 3mm to 8mm.

[0026] In some embodiments of the present invention, the coating material of the low-emissivity coating includes at least one of a metallic material and an infrared-reflecting metal oxide or a transparent conductive oxide (TCO). The metallic material includes at least one of silver, gold, and aluminum, and the infrared-reflecting metal oxide includes at least one of tin oxide and aluminum oxide.

[0027] The present invention also provides a method for preparing low-carbon glass for signal enhancement, comprising the following steps: preparing a signal enhancement unit on a low-emissivity coating by etching or masking, wherein the etching method includes laser etching, and the signal enhancement unit is composed of at least one or more periodically arranged butterfly-shaped units, wherein the butterfly-shaped units are composed of continuous or discontinuous coating removal trajectories.

[0028] The present invention also provides an application of the signal-enhancing low-carbon glass as described above, the signal-enhancing low-carbon glass being used in architectural glass or vehicle glass, the signal enhancement including sub-6G and / or 5G millimeter wave signal transmission enhancement.

[0029] The beneficial effects that this invention can achieve are:

[0030] The present invention provides a signal enhancement unit on a low-emissivity film layer. The signal enhancement unit is composed of at least one or more periodically arranged butterfly-shaped units, which are composed of continuous or discontinuous decoating trajectories.

[0031] Using butterfly-shaped units as conductive patterns, these units can generate resonant transmission channels in the sub-6G and 5G millimeter-wave bands, achieving high signal transmission characteristics. The butterfly-wing structure of the units increases the capacitive coupling between signal enhancement units. Compared with traditional square holes, round holes, or grid patterns, the butterfly-shaped units of this invention can respond stably over a wider frequency band. This allows low-carbon glass to maintain excellent visible light transmittance and low infrared emission performance while significantly enhancing its transmission capability for sub-6G and 5G millimeter-wave signals, thereby effectively improving the wireless communication environment within buildings. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the low-carbon glass of the present invention;

[0034] Figure 2 This invention provides a signal enhancement unit composed of multiple periodically arranged butterfly-shaped units, as described in one embodiment.

[0035] Figure 3 Another embodiment of the present invention is a signal enhancement unit composed of a plurality of periodically arranged butterfly-shaped units;

[0036] Figure 4 This is a schematic diagram of the structure of a butterfly-shaped unit of low-carbon glass according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of a butterfly-shaped unit of low-carbon glass according to another embodiment of the present invention;

[0038] Figure 6 The simulated transmittance curves of the low-carbon glass in Example 1 and Comparative Example 1 are shown.

[0039] Figure 7 The simulated transmittance curves of the low-carbon glass in Example 2 and Comparative Example 2 in the sub-6G wave band are shown.

[0040] Figure 8The simulated transmittance curves of the low-carbon glass in Example 2 and Example 3 in the sub-6G wave band are shown.

[0041] 1. Low-emissivity coating; 2. Glass substrate; 3. Hollow layer; 100. Coating removal trajectory; 10. Center pattern; 20. Outer peripheral pattern; 21. First outer peripheral pattern; 22. Second outer peripheral pattern; 23. Third outer peripheral pattern; 24. Fourth outer peripheral pattern; 30. Coating removal protrusion.

[0042] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] In this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this invention.

[0046] Existing methods to improve the signal transmission capability of low-carbon glass mainly include: reducing the thickness of the metal layer, adjusting the film stacking structure, or introducing periodic etching patterns (such as square holes, round holes, or grid structures) on the glass surface to improve transmission in specific frequency bands. However, these methods often suffer from problems such as simple pattern shapes, limited design freedom, and limited transmission improvement, making it difficult to achieve efficient millimeter-wave signal transmission while ensuring visible light transmittance and low infrared emission performance.

[0047] Therefore, how to significantly enhance the transmission capability of Low-E glass to sub-6G signals and 5G millimeter-wave signals while maintaining energy-saving performance has become a key technical problem that urgently needs to be solved in the field of glass and electromagnetic materials.

[0048] In view of this, the present invention provides a low-carbon glass for signal enhancement, referring to... Figure 1 The low-carbon glass includes a glass substrate 2 and a low-emissivity coating 1 disposed on the surface of the glass substrate 2. A signal enhancement unit is disposed on the low-emissivity coating 1. (Refer to...) Figure 2 and Figure 3 The signal enhancement unit is composed of at least one or more periodically arranged butterfly-shaped units, and the butterfly-shaped units are composed of continuous or discontinuous decoating trajectories 100.

[0049] This invention uses a butterfly-shaped unit as the conductive pattern. The butterfly-shaped unit can generate resonant transmission channels in the sub-6G and 5G millimeter-wave bands, achieving high signal transmission characteristics. The butterfly-wing structure of the butterfly-shaped unit can increase the capacitive coupling between signal enhancement units. Compared with traditional square holes, round holes, or grid patterns, the butterfly-shaped unit of this invention can respond stably in a wider frequency band. This allows low-carbon glass to maintain excellent visible light transmittance and low infrared emission performance while significantly enhancing the transmission capability of sub-6G and 5G millimeter-wave band signals, thereby effectively improving the wireless communication environment in buildings.

[0050] In some embodiments, the low-carbon glass of the present invention has a signal transmission loss of no more than 13dB in the 28GHz~40GHz millimeter wave band.

[0051] In some embodiments, the low-carbon glass of the present invention has a signal transmission loss of no more than 11 dB in the sub6 GHz frequency band of 0.5 GHz to 6 GHz.

[0052] In this invention, periodic arrangement refers to the signal enhancement unit being composed of multiple butterfly-shaped units arranged according to a certain pattern, exhibiting repetition or order. The butterfly-shaped units can be infinitely repeated and pieced together to form a grid, or new combinations can be generated through enlargement, reduction, rotation, mirroring, etc., to form a periodic pattern.

[0053] Reference Figure 2 The butterfly-shaped unit is a periodic arrangement pattern that extends from N×N (N=2).

[0054] In this invention, the decoating trajectory 100 refers to the hollow area formed in the low-emissivity coating 1. The decoating trajectory 100 can be formed by designing a mask to prepare the low-emissivity coating 1, or by etching away part of the coating in the low-emissivity coating 1. The decoating trajectory 100 can be continuous or discontinuous. For example, it can be composed of continuous hollow areas or discontinuous hollow areas.

[0055] Reference Figure 4 and Figure 5 The decoating trajectory 100 that constitutes the butterfly-shaped unit is continuous.

[0056] In some embodiments, the decoating trajectory 100 includes at least one of a straight line, a polygonal line, and a curve.

[0057] In some embodiments, the decoating trajectory 100 includes straight lines and polygonal lines, as shown in the figure. Figure 4 and Figure 5 The decoating trajectory 100 in the butterfly-shaped unit includes straight lines and broken lines, which can expand the decoating area and enhance signal transmittance.

[0058] In some embodiments, the butterfly-shaped unit is a symmetrical shape.

[0059] In some embodiments, refer to Figure 4 and Figure 5 The butterfly-shaped unit includes a central graphic 10 formed by a decoating trajectory 100 and four peripheral graphics 20 connected to the outer contour of the central graphic 10. The central graphic 10 resembles the body of a butterfly, and the four peripheral graphics 20 resemble the wings of a butterfly, forming a butterfly wing structure. This gives the signal enhancement unit a butterfly shape. The butterfly wing structure formed by the four peripheral graphics can increase the capacitive coupling between signal enhancement units, and can provide a more stable response over a wider frequency band than traditional square holes, round holes, or grid patterns, thereby effectively improving the wireless communication environment in buildings.

[0060] Among them, the four outer peripheral figures 20 are the first outer peripheral figure 21, the second outer peripheral figure 22, the third outer peripheral figure 23, and the fourth outer peripheral figure 24. The XY coordinate axis is constructed with the center of the central figure 10 as the origin. The first outer peripheral figure 21, the second outer peripheral figure 22, the third outer peripheral figure 23, and the fourth outer peripheral figure 24 are distributed in the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant, respectively. The first outer peripheral figure 21 is rotated 90°, 180°, and 270° around the origin on the same plane, and then overlaps with the second outer peripheral figure 22, the third outer peripheral figure 23, and the fourth outer peripheral figure 24, respectively. The direction of rotation can be counterclockwise.

[0061] It is understandable that the outer contour of the central graphic 10 is formed by the decoating trajectory 100.

[0062] In some embodiments, the central graphic 10 is a symmetrical graphic.

[0063] In some embodiments, the XY coordinate axis is constructed with the center of the central graphic 10 as the origin. The central graphic 10 is symmetrical about the X-axis and about the Y-axis.

[0064] In some embodiments, the central pattern 10 is surrounded by a decoating trajectory 100, which helps to improve the transmission capability of low-carbon glass for sub-6G wave band signals and 5G millimeter wave band signals.

[0065] In some embodiments, the central graphic 10 includes one or more overlapping graphics such as a circle, ellipse, polygon, rectangle, heart, or star.

[0066] Reference Figure 4 The central graphic 10 is a rectangle.

[0067] Reference Figure 5 The central graphic 10 is formed by the overlap of two rectangles.

[0068] In some embodiments, the central region of the central graphic 10 has a cutout area, which means that no coating is applied to the central region.

[0069] In some embodiments, the outer edge of the outer contour of the central graphic 10 is provided with n coating removal protrusions 30, where n is an integer greater than 0. The design of the coating removal protrusions 30 can increase the area of ​​the coating removal and enhance signal transmittance.

[0070] It is understood that the outer contour of the central pattern 10 refers to the side of the decoating trajectory 100 that is away from the center of the central pattern 10, and the decoating protrusion 30 refers to the hollow area formed in the low-emissivity coating 1. The decoating protrusion 30 can be formed by designing a mask to prepare the low-emissivity coating 1, or by etching away part of the coating in the low-emissivity coating 1 to form the decoating protrusion 30. The etching method includes laser etching.

[0071] In some embodiments, the outer edge of the outer contour of the central graphic 10 is provided with 2, 4, 8, 16, 20 or 24 decoating protrusions 30.

[0072] In some embodiments, reference Figure 4 The central graphic 10 is a rectangle, and the outer edge of the rectangle is provided with 4 coating removal protrusions 30, with each coating protrusion located on the outer edge of the four corners of the rectangle.

[0073] In some embodiments, reference Figure 5 The central graphic 10 is composed of two overlapping rectangles. The outer edge of the central graphic 10 is provided with four decoating protrusions 30, which are respectively located at the intersection of the two rectangles.

[0074] In some embodiments, the peripheral pattern includes at least two decoating trajectories A1A2 and B1B2 that are determined from the outer contour of the central pattern 10 by starting points A1 and B1, and extending outward from A1 and B1 to the outer periphery of the outer contour, respectively. A1 and B1 do not overlap, and A1A2 and B1B2 have at least one intersection point.

[0075] Reference Figure 4 and Figure 5In the decoating trajectory 100, A1 in A1A2 serves as the starting point on the outer contour of the central graphic 10, and B1 in trajectory B1B2 serves as the starting point on the outer contour of the central graphic 10. A1 and B1 do not overlap. In addition, A1A2 and B1B2 have an intersection point M1. In this embodiment, the three points A2, B2, and M1 overlap.

[0076] In some embodiments, after A1A2 and B1B2 intersect, they form an included angle N toward the central figure 10, where the included angle N is an acute angle or a right angle.

[0077] In some embodiments, refer to Figure 4 After A1A2 and B1B2 intersect, they form an angle N toward the central figure 10, and the angle N is an acute angle.

[0078] In some embodiments, refer to Figure 5 After A1A2 and B1B2 intersect, they form an angle N toward the central figure 10, and the angle N is a right angle.

[0079] In some embodiments, A1A2 includes a straight line and a polyline, and B1B2 includes a straight line and a polyline. (See reference...) Figure 4 The first outer peripheral pattern 21 in the butterfly-shaped unit includes A1A2 and B1B2 of the decoating trajectory 100. A1A2 is composed of A1A3 and A3A2 of the decoating trajectory 100. A1A3 is a straight line and A3A2 is a broken line. B1B2 is composed of B1B3 and B3B2 of the decoating trajectory 100. B1B3 is a straight line and B3B2 is a broken line.

[0080] Continue to refer to Figure 4 The central figure 10 of the butterfly-shaped unit is a square. The midpoints of two adjacent sides of the square are A1 and B1. Starting from A1 and B1, the decoating trajectory 100 A1A2 and B1B2 are extended to the outer periphery of the outer contour of the central figure 10. A1A2 is composed of A1A3 and A3A2 of the decoating trajectory 100. A1A3 is a straight line perpendicular to the side where A1 is located, and A3A2 is a broken line. B1B2 is composed of B1B3 and B3B2 of the decoating trajectory 100. B1B3 is a straight line perpendicular to the side where B1 is located, and B3B2 is a broken line. A1A2 and B1B2 intersect at M1 to form an angle N facing the square. A2, B2 and M1 overlap, and the angle N is a right angle.

[0081] In some embodiments, A1A2 is a broken line, and B1B2 is a broken line. (Refer to...) Figure 5 The first sub-graphic in the butterfly-shaped unit includes A1A2 and B1B2 of the decoating trajectory 100, both of which are polylines.

[0082] Continue to refer to Figure 5The central graphic 10 of the butterfly-shaped unit is composed of two overlapping rectangles. Two points are selected on the outer contour of the central graphic 10 as starting points A1 and B1. Starting from A1 and B1, the decoating trajectory 100 A1A2 and B1B2 are extended to the outer periphery of the outer contour of the central graphic 10 respectively. A1A2 and B1B2 are both broken lines. A1A2 and B1B2 intersect at M1 to obtain an included angle N towards the circle. A2, B2 and M1 overlap, and the included angle N is a right angle.

[0083] The width of the coating removal trajectory 100 of the present invention can be set according to actual needs. In some embodiments, the width of the coating removal trajectory 100 is 25μm~100μm, and can be 25μm, 35μm, 50μm, 55μm, 60μm, 70μm, 80μm, 90μm, 100μm, etc.

[0084] The periodic space size T of the butterfly-shaped unit of the present invention can be set according to actual needs. In some embodiments, the periodic space size T of the butterfly-shaped unit is 1mm to 100mm, and can be 1mm, 2mm, 4mm, 8mm, 10mm, 16mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, etc.

[0085] It is understandable that the periodic spatial size T of the butterfly-shaped unit refers to the geometric dimension occupied by the butterfly-shaped unit repeating once in space, as shown in the reference. Figure 4 and Figure 5 The geometric dimensions are either length or width.

[0086] The low-carbon glass designed in this invention can maintain high visible light transmittance and low infrared emission performance while exhibiting good transmission capability in the sub-6G wave band and 5G millimeter wave band.

[0087] In this invention, the size of the butterfly-shaped unit can be designed according to the characteristics of the signal band to improve the transmission capability of low-carbon glass to various bands.

[0088] The 5G millimeter-wave band corresponds to a frequency range of 24GHz to 40GHz, with an electromagnetic wave length greater than or equal to 7.5mm. In some embodiments, the periodic spatial size T of the butterfly-shaped unit is 1mm, and the width of the decoating trajectory 100 is 25μm. (Refer to...) Figure 4The butterfly-shaped unit is composed of a continuous uncoated trajectory 100, including a square-shaped central figure 10 and outer peripheral figures. The outer peripheral figures include a first outer peripheral figure 21, a second outer peripheral figure 22, a third outer peripheral figure 23, and a fourth outer peripheral figure 24. The outer edges of the four corners of the square have uncoated protrusions 30. The XY coordinate axes are constructed with the center of the square as the origin. The first outer peripheral figure 21, the second outer peripheral figure 22, the third outer peripheral figure 23, and the fourth outer peripheral figure 24 fall into the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant, respectively. Furthermore, the first outer peripheral figure 21 is rotated counterclockwise by 90°, 180°, and 270° on the same plane with the origin as the fixed point. Afterwards, the second outer perimeter pattern 22, the third outer perimeter pattern 23, and the fourth outer perimeter pattern 24 are overlapped respectively. Taking the first outer perimeter pattern 21 as an example, starting points A1 and B1 are determined at the midpoints of two adjacent sides of the square. The decoating trajectories 100A1A2 and B1B2 are obtained by extending along the outer perimeter of the square respectively. Among them, A1A2 includes the straight part A1A3 and the broken line part A3A2, and A1A3 is perpendicular to the side where A1 is located; B1B2 includes the straight part B1B3 and the broken line part B3B2, and B1B3 is perpendicular to the side where B1 is located. In addition, A1A2 and B1B2 intersect at M1 to form an included angle N, which is a right angle. The three points A2, B2, and M1 overlap. The low-carbon glass with a signal enhancement unit composed of at least one or more periodically arranged butterfly-shaped units of this embodiment has good transmission capability to the 5G millimeter wave band.

[0089] The sub-6GHz band corresponds to a frequency range of approximately 0.5GHz to 6GHz, with an electromagnetic wave length greater than or equal to 50mm. In some embodiments, the periodic spatial size T of the butterfly-shaped unit is 4mm, and the width of the decoating trajectory 100 is 100μm. (Refer to...) Figure 5The butterfly-shaped unit is composed of a continuous uncoating trajectory 100, including a central shape 10 and outer peripheral shapes. The central shape 10 is obtained by overlapping two rectangles. Uncoating protrusions 30 are provided at the intersection of the two rectangles. The XY coordinate axis is constructed with the midpoint of the central shape 10 as the origin. The first outer peripheral shape 21, the second outer peripheral shape 22, the third outer peripheral shape 23, and the fourth outer peripheral shape 24 fall into the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant, respectively. Moreover, with the origin as the fixed point, the first outer peripheral shape 21 is on the same plane. After being rotated counterclockwise by 90°, 180°, and 270° on the surface, they overlap with the second outer peripheral pattern 22, the third outer peripheral pattern 23, and the fourth outer peripheral pattern 24, respectively. Taking the first outer peripheral pattern 21 as an example, two starting points A1 and B1 are determined on the outer contour of the central pattern 10. A1 and B1 extend along the outer periphery of the outer contour to obtain the decoating trajectory 100 A1A2 and B1B2, respectively. A1A2 and B1B2 are both broken lines. In addition, A1A2 and B1B2 intersect at M1 to form an angle N, which is a right angle. Points A2, B2, and M1 overlap. The low-carbon glass having a signal enhancement unit composed of at least one periodically arranged butterfly-shaped unit of this embodiment has good transmission capability to the sub-6G wave band.

[0090] In some embodiments, the periodic space size T of the butterfly-shaped unit can also be adjusted accordingly to proportionally adapt to the width of different decoating trajectories 100.

[0091] In some embodiments, when the width of the decoating trajectory 100 in the butterfly-shaped unit is w μm, the periodic space size T of the butterfly-shaped unit is (w / 10) mm to (w / 50) mm, which can be (w / 10) mm, (w / 15) mm, (w / 20) mm, (w / 25) mm, (w / 30) mm, (w / 35) mm, (w / 40) mm, (w / 45) mm, (w / 50) mm, etc.

[0092] For example, when the width of the decoating trajectory 100 in the butterfly unit is 100μm and the periodic space size T of the butterfly unit is (100 / 25) = 4mm, it can be reduced to a butterfly unit with a decoating width of 25μm and a periodic space size T of (25 / 25) = 1mm.

[0093] In some embodiments, the low-carbon glass further includes a hollow layer 3 disposed between two glass substrates 2, and a low-emissivity coating 1 disposed on the surface of at least one glass substrate 2 facing the hollow layer 3.

[0094] In some embodiments, the hollow layer 3 is filled with at least one of air, nitrogen, and argon.

[0095] In some embodiments, the spatial width of the hollow layer 3 is 6mm to 16mm, which can be 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, etc. It can be understood that the spatial width of the hollow layer 3 refers to the vertical distance between the two glass substrates 2.

[0096] In some embodiments, the thickness of the glass substrate 2 is 3mm to 8mm, and can be 3mm, 5mm, 7mm, 8mm, etc.

[0097] In some embodiments, the coating material for preparing the low-emissivity coating 1 includes at least one of a metallic material and an infrared-reflecting metal oxide or a transparent conductive oxide (TCO).

[0098] In some embodiments, the metallic material includes at least one of silver, gold, and aluminum.

[0099] In some embodiments, the infrared-reflecting metal oxide includes at least one of tin oxide and aluminum oxide.

[0100] The present invention also provides a method for preparing low-carbon glass for signal enhancement, comprising the following steps: preparing a signal enhancement unit on a low-emissivity coating 1 by etching or masking, wherein the etching method includes laser etching, and the signal enhancement unit is composed of at least one or more periodically arranged butterfly-shaped units, wherein the butterfly-shaped units are composed of continuous or discontinuous coating removal trajectories 100.

[0101] When the method for forming the butterfly-shaped unit is laser etching, a low-emissivity coating 1 can be prepared on the surface of the glass substrate 2 first, and then a laser can be used to etch away part of the coating on the low-emissivity coating 1 to form a coating removal trajectory 100.

[0102] When the method for forming the butterfly-shaped unit is the mask method, a low-emissivity coating 1 can be prepared using a mask, and a decoating trajectory 100 can be formed on the low-emissivity coating 1 to obtain the butterfly-shaped unit.

[0103] The present invention also provides an application of low-carbon glass for signal enhancement. The low-carbon glass of the present invention can be applied to architectural glass or vehicle glass, and the signal enhancement includes transmission enhancement of sub6G and / or 5G millimeter wave signals.

[0104] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and are not intended to limit the present invention.

[0105] Example 1

[0106] Reference Figure 1In this embodiment, the low-carbon glass for signal enhancement has two pieces of 6mm thick sodium-calcium-silicon ultra-white glass with a size of 300mm×300mm. A hollow layer with a thickness of 12mm and filled with air is provided between the two pieces of sodium-calcium-silicon ultra-white glass. A low-emissivity coating 1 is provided on the surface of one piece of sodium-calcium-silicon ultra-white glass facing the hollow layer. The low-emissivity coating 1 is a LOW-E triple silver glass coating material.

[0107] Reference Figure 2 The low-emissivity coating 1 is provided with a signal enhancement unit, which consists of multiple periodically arranged butterfly-shaped units.

[0108] Reference Figure 4 The butterfly-shaped unit is composed of a continuous uncoated trajectory 100, including a square-shaped central figure 10 and an outer peripheral figure 20. The outer peripheral figure 20 includes a first outer peripheral figure 21, a second outer peripheral figure 22, a third outer peripheral figure 23, and a fourth outer peripheral figure 24. The outer edges of the four corners of the square have uncoated protrusions. The XY coordinate axis is constructed with the center of the square as the origin. The first outer peripheral figure 21, the second outer peripheral figure 22, the third outer peripheral figure 23, and the fourth outer peripheral figure 24 fall into the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant, respectively. Furthermore, the first outer peripheral figure 21 is rotated counterclockwise by 90°, 180°, and 270° on the same plane with the origin as the fixed point. After °, the second outer perimeter graphic 22, the third outer perimeter graphic 23, and the fourth outer perimeter graphic overlap 24 respectively. Taking the first outer perimeter graphic 21 as an example, the starting points A1 and B1 are determined at the midpoints of two adjacent sides of the square. The uncoated trajectories A1A2 and B1B2 are obtained by extending along the outer perimeter of the square respectively. A1A2 includes the straight part A1A3 and the broken line part A3A2, and A1A3 is perpendicular to the side where A1 is located. B1B2 includes the straight part B1B3 and the broken line part B3B2, and B1B3 is perpendicular to the side where B1 is located. In addition, A1A2 and B1B2 intersect at M1 to form an angle N, which is an acute angle. The three points A2, B2, and M1 overlap.

[0109] In this embodiment, the width of the decoating trajectory is 25 μm, and the periodic space size T of the butterfly-shaped unit is 1 mm.

[0110] Example 2

[0111] The low-carbon glass of Example 2 is basically the same as the low-carbon glass of Example 1, except that:

[0112] Reference Figure 3 The low-emissivity coating 1 is provided with a signal enhancement unit, which is composed of multiple periodically arranged butterfly-shaped units.

[0113] Reference Figure 5The butterfly-shaped unit is composed of a continuous uncoating trajectory 100, including a central shape 10 and an outer shape 20. The central shape 10 is obtained by overlapping two rectangles. Uncoating protrusions 30 are provided at the intersection of the two rectangles. An XY coordinate axis is constructed with the midpoint of the central shape 10 as the origin. The first outer shape 21, the second outer shape 22, the third outer shape 23, and the fourth outer shape 24 fall into the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant, respectively. Furthermore, with the origin as a fixed point, the first outer shape 21... After rotating counterclockwise by 90°, 180° and 270° on the same plane, they overlap with the second outer peripheral figure 22, the third outer peripheral figure 23 and the fourth outer peripheral figure 24 respectively. Taking the first outer peripheral figure 21 as an example, two starting points A1 and B1 are determined on the outer contour of the central figure 10. A1 and B1 extend along the outer periphery of the outer contour to obtain the decoating trajectory A1A2 and B1B2 respectively. A1A2 and B1B2 are both broken lines. In addition, A1A2 and B1B2 intersect at M1 to form an included angle N. The included angle N is a right angle. The three points A2, B2 and M1 overlap.

[0114] The width of the decoating trajectory is 100 μm, and the period space size T is 4 mm.

[0115] Example 3

[0116] The low-carbon glass in Example 3 is basically the same as that in Example 2, with the same butterfly-shaped unit pattern. The difference is that the width of the coating removal trajectory is 35 μm, and the periodic space size T of the butterfly-shaped unit is 1.4 mm.

[0117] Comparative Example 1

[0118] The low-carbon glass of Comparative Example 1 is basically the same as that of Example 1, except that the signal enhancement unit of Comparative Example 4 is composed of multiple periodically arranged squares, which are composed of decoating tracks. Moreover, the squares have the same periodic space size T and the same area of ​​the decoating tracks as the butterfly-shaped unit of Example 1.

[0119] Comparative Example 2

[0120] The low-carbon glass of Comparative Example 2 is basically the same as that of Example 2, except that the signal enhancement unit of Comparative Example 2 is composed of multiple periodically arranged squares, which are composed of decoating tracks. The squares have the same periodic space size T and the same area of ​​the decoating tracks as the butterfly-shaped unit of Example 2.

[0121] Comparative Example 3

[0122] The low-carbon glass of Comparative Example 3 is basically the same as the low-carbon glass of Example 1, except that the low-emissivity coating does not have a signal enhancement unit.

[0123] Performance testing

[0124] 1. The transmittance of the low-carbon glass in the examples and comparative examples to the millimeter wave band and sub-6G wave band was determined. The test standard was the new standard GB / T 45925-2025 in 2025. The evaluation criteria are shown in Table 1.

[0125] Table 1

[0126]

[0127] Reference Figure 6 , Figure 6 The simulated transmittance curves of the low-carbon glass in Example 1 and Comparative Example 1 for the millimeter-wave band are shown below. Figure 6 It can be seen that the low-carbon glass with butterfly-shaped units in Example 1 has a signal transmission loss of no more than 13dB in the 28GHz~40GHz millimeter wave band. Compared with a square structure with the same periodic unit size and the same etching area ratio, the transmittance is improved by an average of 2.17dB.

[0128] Reference Figure 7 , Figure 7 The simulated transmittance curves of the low-carbon glass in Example 2 and Comparative Example 2 in the sub-6G wave band are shown below. Figure 7 It can be seen that the low-carbon glass with butterfly-shaped units in Example 2 has a signal transmission loss of no more than 11dB in the sub6G frequency band of 0.5GHz to 6GHz, which is an average increase of 0.26dB in transmittance compared with a square structure with the same periodic unit size and the same etching area ratio.

[0129] Reference Figure 8 , Figure 8 The figures show the simulated transmittance curves of the low-carbon glass in the sub-6G frequency band for Examples 2 and 3. Taking the sub-6G frequency band pattern of Example 2 as an example, the unit shape is kept as follows. Figure 5 Without changing the pattern in Example 3, which is scaled up proportionally, the periodic space size T of the butterfly-shaped unit is w / 25mm when the coating width is wμm. It can be seen that the signal transmission capability curves at etching accuracies of 35μm and 100μm almost overlap, indicating that this application can adjust the unit size accordingly to proportionally adapt to different etching widths.

[0130] 2. The heat transfer coefficient U (w / m) of the low-carbon glass in Example 1 and Comparative Example 3 was measured. 2 •k) Shading coefficient (SC), recorded in Table 1.

[0131] Test standard: GB 18915-2-2013.

[0132] Table 2

[0133]

[0134] As shown in Table 2, the present invention incorporates a signal enhancement unit, which consists of at least one periodically arranged butterfly-shaped unit. Compared to Comparative Example 3, which lacks a signal enhancement unit, there are no significant changes in heat transfer coefficient, shading coefficient, visible light transmittance, and reflectivity. Therefore, the butterfly-shaped unit of this application improves the signal transmission capability of the glass in the sub-6G and 5G millimeter-wave bands while ensuring light transmittance and low infrared radiation performance.

[0135] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A low-carbon glass for signal enhancement, characterized in that, The low-carbon glass includes a glass substrate and a low-emissivity coating disposed on the surface of the glass substrate. The low-emissivity coating is provided with a signal enhancement unit, which is composed of at least one periodically arranged butterfly-shaped unit. The butterfly-shaped unit is composed of continuous or discontinuous decoating trajectories. The butterfly-shaped unit includes a central graphic formed by the decoating trajectory and four peripheral graphics that are respectively connected to the outer contour of the central graphic. The four peripheral graphics are the first peripheral graphic, the second peripheral graphic, the third peripheral graphic, and the fourth peripheral graphic. The XY coordinate axis is constructed with the center of the central graphic as the origin. The first, second, third, and fourth outer peripheral graphics are distributed in the first, second, third, and fourth quadrants, respectively. After the first outer peripheral graphic is rotated 90°, 180°, and 270° around the origin on the same plane, it overlaps with the second, third, and fourth outer peripheral graphics, respectively. The outer peripheral pattern includes at least two decoating trajectories A1A2 and B1B2, which are determined from the outer contour of the central pattern, starting from A1 and B1 respectively, and extending outward from A1 and B1 to the outer periphery of the outer contour. A1 and B1 do not overlap, and A1A2 and B1B2 have at least one intersection point.

2. The low-carbon glass for signal enhancement according to claim 1, characterized in that, The coating removal trajectory includes at least one of a straight line, a broken line, and a curve.

3. The low-carbon glass for signal enhancement according to claim 1, characterized in that, The butterfly-shaped unit is a symmetrical shape.

4. The low-carbon glass for signal enhancement according to claim 1, characterized in that, The central graphic is formed by the decoating trajectory, and the central graphic includes one or more overlapping graphics such as circles, ellipses, polygons, hearts, or stars.

5. The low-carbon glass for signal enhancement according to claim 1, characterized in that, The outer edge of the outer contour of the central graphic is provided with n coating removal protrusions, where n is an integer greater than 0. The coating removal protrusions refer to the hollow areas formed in the low-emissivity coating.

6. The low-carbon glass for signal enhancement according to claim 5, characterized in that, The central graphic is a rectangle, and the outer edges of the four corners of the rectangle are provided with the coating removal protrusions.

7. The low-carbon glass for signal enhancement according to claim 1, characterized in that, When A1A2 and B1B2 intersect, they form an angle N toward the central figure. The angle N is an acute angle or a right angle.

8. The low-carbon glass for signal enhancement according to claim 1, characterized in that, A1A2 includes both straight-line and polyline trajectories, and B1B2 includes both straight-line and polyline trajectories.

9. The low-carbon glass for signal enhancement according to claim 1, characterized in that, The width of the coating removal trajectory is 25μm~100μm.

10. The low-carbon glass for signal enhancement according to claim 1, characterized in that, The periodic space size T of the butterfly-shaped unit is 1mm to 100mm. The periodic space size T refers to the geometric dimension occupied by the butterfly-shaped unit when it repeats once in space. The geometric dimension is either length or width.

11. The low-carbon glass for signal enhancement according to claim 9 or 10, characterized in that, When the width of the decoating trajectory is wμm, the periodic space size T of the butterfly-shaped unit is: (w / 10)mm~(w / 50)mm.

12. The low-carbon glass for signal enhancement according to claim 1, characterized in that, The low-carbon glass further includes a hollow layer disposed between the two glass substrates, and the low-emissivity coating is disposed on the surface of at least one of the glass substrates facing the hollow layer.

13. The low-carbon glass for signal enhancement according to claim 12, characterized in that, The hollow layer has a spatial width of 6mm to 16mm; and / or the glass substrate has a thickness of 3mm to 8mm.

14. The low-carbon glass for signal enhancement according to claim 1, characterized in that, The coating material of the low-emissivity coating includes at least one of a metallic material and an infrared-reflecting metal oxide or a transparent conductive oxide (TCO). The metallic material includes at least one of silver, gold, and aluminum, and the infrared-reflecting metal oxide includes at least one of tin oxide and aluminum oxide.

15. A method for preparing a signal-enhancing low-carbon glass according to any one of claims 1 to 14, characterized in that, Includes the following steps: Signal enhancement units are fabricated on low-emissivity coatings by etching or masking methods, wherein the etching method includes laser etching, and the signal enhancement units consist of at least one periodically arranged butterfly-shaped units, wherein the butterfly-shaped units consist of continuous or discontinuous coating removal trajectories.

16. The application of the signal-enhancing low-carbon glass according to any one of claims 1 to 14, characterized in that, The signal-enhancing low-carbon glass is used in architectural or vehicle glass, and the signal enhancement includes transmission enhancement of sub-6G and / or 5G millimeter-wave signals.

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