Glass with energy saving and wireless communication band enhancement functions

Abstract

The application provides a glass with energy-saving and wireless communication frequency band enhancement functions, comprising periodically arranged FSS units, each of which comprises an infrared low emission layer, an air layer and a wave-transparent FSS layer, the infrared low emission layer comprising a first glass layer and a first dielectric substrate; the surface of the first glass layer is provided with a first etching layer; the first etching layer comprises a plurality of grid grooves; the wave-transparent FSS layer comprises a second glass layer, a second dielectric substrate and a third glass layer; the surface of the second glass layer is provided with a second etching layer; the second etching layer comprises an annular groove and a plurality of cut grooves arranged on the circumferential side of the annular groove; the surface of the third glass layer is provided with a third etching layer; and the third etching layer is provided with a second annular patch. The structure can realize the effects of wave-transparent communication frequency band and infrared low emission, has visible light transparency, meets certain thickness and is suitable for large-area paving.

Description

Technical Field

[0001] This invention relates to the fields of wireless communication and metamaterials technology, specifically to a glass that combines energy saving and wireless communication frequency band enhancement. Background Technology

[0002] Maintaining a comfortable indoor temperature typically consumes a significant amount of energy, accounting for 20-40% of energy budgets in many countries. For example, windows, being a large part of a building's exterior surface, experience intense heat exchange through which indoor cooling systems operate during hotter months, leading to substantial energy consumption. Therefore, designing energy-efficient glass is a crucial research area.

[0003] Low-emissivity (Low-E) glass is a type of coated glass with high reflectivity for far-infrared light in the wavelength range of 4.5–25 μm, exhibiting low emissivity. Because the metal coating can attenuate mobile communication signals, repeaters are increasingly used to improve signal quality inside buildings or trains. However, these systems are expensive, energy-intensive, and technologically dependent. Currently, the international demand for 5G mobile communication is urgent, and the communication frequency bands below 5 GHz are already very congested, leading to electromagnetic compatibility challenges for 5G communication.

[0004] Existing technology 1 (Safari M, He Y, Kim M, et al. “Optically and radiofrequency (RF) transparent meta-glass”. Nanophotonics 2020; 9(12): 3889–3898.) discloses a radio frequency and visible light transparent composite metasurface composed of multiple conductive coatings. This composite metasurface has a transmission peak of 83% and 78% at 28 GHz and 550 nm, respectively. However, it does not have low emission performance in the infrared range and cannot play a role in energy saving.

[0005] Prior art 2 (Safari M, Kherani NP, Eleftheriades G V. “Multi-functional Metasurface: Visibly and RF Transparent, NIR Control and Low Thermal Emissivity”. Adv. Optical Mater. 2021, 2100176) discloses a multifunctional metasurface that has a 92% RF transmission efficiency at 30 GHz, 86% optical transparency at λ=550 nm, >60% near-infrared reflection, and >80% mid-infrared reflection. However, it has a narrow bandwidth in the transmission band and is mainly used in high-frequency designs. In addition, the thickness of the designed structure is very thin, which is not conducive to large-area application.

[0006] Therefore, developing a technology that can ensure visible light transparency, good wave transmission performance in communication bands, and energy-saving low infrared emission would be a research project of great significance. Summary of the Invention

[0007] To address the problem that existing technologies cannot simultaneously achieve visible light transparency, communication band wave transmission, and low infrared emission, the present invention aims to provide a glass that combines energy saving and 5G wireless communication band enhancement.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows.

[0009] A type of glass that combines energy saving and enhanced wireless communication frequency bands includes periodically arranged FSS units, each of which comprises an infrared low-emission layer, an air interlayer, and a wave-transparent FSS layer arranged in sequence.

[0010] The infrared low-emission layer includes a first glass layer and a first dielectric substrate arranged in sequence; the surface of the first glass layer has a first etched layer; the first etched layer includes multiple crisscrossing grid trenches;

[0011] The wave-transparent FSS layer includes a second glass layer, a second dielectric substrate, and a third glass layer stacked sequentially; the surface of the second glass layer has a second etched layer; the second etched layer includes at least one annular groove and a plurality of slots, the plurality of slots being arranged around the periphery of the outermost annular groove;

[0012] The surface of the third glass layer has a third etched layer; a second annular patch is present on the third etched layer.

[0013] Furthermore, the multiple mesh trenches form an array of patch units on the surface of the first glass layer.

[0014] Furthermore, the annular groove is etched on the surface of the second glass layer to form a central patch and a first annular patch, the central patch being disposed within the first annular patch.

[0015] Furthermore, multiple grooves are etched on the surface of the second glass layer to form multiple corner patches, which are arranged around the periphery of the first annular patch.

[0016] Furthermore, the corner patch has at least four pieces; the corner patch is triangular in shape.

[0017] Furthermore, a first etched surface and a second etched surface are etched on the surface of the third glass layer, and the second etched surface is disposed within the first etched surface to form a second annular patch;

[0018] The outer diameter of the second annular patch is smaller than the inner diameter of the first annular patch.

[0019] Furthermore, each of the FSS units has a vertically arranged central axis, and the center of the first annular patch and the center of the second annular patch are both arranged on the central axis.

[0020] Furthermore, the outer diameter of the second annular patch is equal to or smaller than the outer diameter of the central patch.

[0021] Furthermore, the first glass layer, the second glass layer, and the third glass layer are all made of ITO conductive glass, and the conductivity of the ITO conductive glass is 7.35 × 10⁻⁶. 5 ~ 1.47×10 6 Sheet resistance is 1 ~ 2 Ω / sq;

[0022] The dielectric constant of the ITO conductive glass is 5~7, and the dielectric loss angle is 0.001~0.005.

[0023] Furthermore, both the first dielectric substrate and the second dielectric substrate are made of plexiglass; the dielectric constant of the plexiglass is 1 to 3, and the dielectric loss angle is 0.001 to 0.005.

[0024] Furthermore, the first dielectric substrate, the second dielectric substrate, the first glass layer, the second glass layer, and the third glass layer are all cut from materials that are highly transparent under visible light.

[0025] Furthermore, the dimensions of the first dielectric substrate, the second dielectric substrate, the first glass layer, the second glass layer, and the third glass layer are all 30 nm.

[0026] The beneficial effects of this invention are:

[0027] 1. The present invention constructs an FSS unit by means of an infrared low emission layer, an air interlayer and a wave-transparent FSS layer, so as to achieve the effect of wave transmission and infrared low emission in the communication frequency band, and has visible light transparency, and meets a certain thickness, which is suitable for large-area laying.

[0028] 2. This invention uses laser etching to pattern the surface of a glass layer, and utilizes different types of pattern units to generate resonance at different frequencies to achieve selective wave transmission.

[0029] 3. The structure of the present invention has the advantages of simple structure, mature processing technology and low cost.

[0030] 4. The structure of this invention has a wide range of applications and is suitable for various environments that require windows. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the glass that combines energy saving and wireless communication frequency band enhancement functions provided in this embodiment.

[0032] Figure 2 This is a schematic diagram of the structure of the FSS unit in the glass that combines energy saving and wireless communication frequency band enhancement functions provided in this embodiment.

[0033] Figure 3 This is a structural split diagram of the FSS unit in the glass that combines energy saving and wireless communication frequency band enhancement functions provided in this embodiment.

[0034] Figure 4 This is a schematic diagram of the structure of the second etched layer (A) and the third etched layer (B) in this embodiment.

[0035] Figure 5 This is a schematic diagram of the communication performance test principle of a sealed cavity made of six Low-e glass panels.

[0036] Figure 6 This is a schematic diagram of the communication performance testing principle of a sealed cavity formed by five Low-e glass panels and one glass panel that combines energy saving and wireless communication frequency band enhancement functions.

[0037] Figure 7 This is a schematic diagram of the cavity structure for preparing non-cylindrical glass for thermal insulation performance testing.

[0038] Figure 8 Is adopted Figure 6 A comparison chart of the thermal insulation performance of the cavity tested from 9:01 a.m. to 8:30 p.m.

[0039] Figure 9 Is adopted Figure 6A comparison chart of the thermal insulation performance of the cavity tested from 0:02 a.m. to 9:41 p.m.

[0040] Figure 10 This is a simulated transmission and reflection coefficient curve of the glass provided in this embodiment, which combines energy saving and wireless communication frequency band enhancement functions.

[0041] Figure 11 This is a simulated horizontal and vertical polarized wave oblique incidence transmission coefficient curve of the glass provided in this embodiment, which combines energy saving and wireless communication frequency band enhancement functions.

[0042] Figure 12 These are test charts showing the surface emissivity of unetched ITO conductive glass, etched ITO conductive glass, and ordinary glass, measured using a TSS-5X emissivity meter.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Infrared low-emission layer; 11. First glass layer; 111. First etched layer; 111-1. Mesh trench; 111-2. Patch unit; 12. First dielectric substrate;

[0045] 2. Air gap;

[0046] 3. Wave-transparent FSS layer; 31. Second glass layer; 311. Second etched layer; 311-1. Annular trench; 311-2. Groove; 311-3. Center patch; 311-4. First annular patch; 311-5. Corner patch; 32. Second dielectric substrate; 33. Third glass layer; 331. Third etched layer; 331-1. First etched surface; 331-2. Second etched surface; 331-3. Second annular patch. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0048] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Currently, the glass used in open window environments is mainly ordinary glass, such as low-emissivity (Low-E) glass. This type of glass has a low emissivity, which can easily attenuate mobile communication signals and even block signals. In addition, this type of glass has poor thermal insulation properties. Therefore, in order to solve the problems of wave transmission in communication bands and low infrared emission, it is necessary to develop new glass structures that can ensure good wave transmission performance in communication bands while also having energy-saving properties with low infrared emission.

[0050] Please see Figure 1 This is a schematic diagram of a three-dimensional glass structure consisting of FSS units arranged in a 3 × 3 array, which combines energy saving and wireless communication frequency band enhancement. In practical applications, the number of FSSS units is not limited and is determined according to needs. For example, it can be a 2 × 2 array, a 3 × 3 array, a 4 × 4 array, etc.

[0051] Please see Figures 2 to 4 A type of glass that combines energy saving and enhanced wireless communication frequency bands includes periodically arranged FSS (Free-Side Shielding) units. Each FSS unit comprises an infrared low-emission layer 1, an air gap 2, and a wave-transparent FSS layer 3, stacked sequentially. Specifically, each FSS unit consists of three layers: the first layer is the infrared low-emission layer 1, which is mainly used to achieve low infrared emission and wave transmission in the microwave frequency band; the second layer is the air gap 2, which provides heat insulation, and the thickness of the air gap can be designed according to requirements; the third layer is the wave-transparent FSS layer 3, which is mainly used to achieve selective wave transmission and large-angle stability in the communication frequency band. The space between the first and third layers constitutes the air gap 2.

[0052] In some embodiments of the present invention, the infrared low-emissivity layer 1 includes a first glass layer 11 and a first dielectric substrate 12 stacked sequentially and bonded together. The first glass layer 11 and the first dielectric substrate 12 are square structures with a side length of 30 nm. The first glass layer 11 is made of ITO conductive glass, and the conductivity of ITO conductive glass is 7.35 × 10⁻⁶. 5 ~ 1.47×10 6 The sheet resistance is 1~2 Ω / sq; the dielectric constant of the ITO conductive glass is 5~7, and the dielectric loss angle is 0.001~0.005. The first dielectric substrate 12 is made of environmentally friendly, high-transparency, lightweight and tough acrylic glass (PMMA); the dielectric constant of the acrylic glass is 1~3, and the dielectric loss angle is 0.001~0.005. The combination of the first glass layer 11 and the first dielectric substrate 12 forms an infrared low-emission layer 1 to achieve low infrared emission and microwave frequency transmission.

[0053] In some embodiments of the present invention, the surface of the first glass layer 11 has a first etched layer 111; the first etched layer 111 has multiple crisscrossing grid trenches 111-1; multiple grid trenches 111-1 are etched on the surface of the first glass layer 11 to form an array of patch units 111-2. The patch unit 111-2 is a square patch.

[0054] In some embodiments of the present invention, the wave-transparent FSS layer 3 includes a second glass layer 31, a second dielectric substrate 32, and a third glass layer 33 stacked sequentially and bonded together. The second glass layer 31 and the third glass layer 33 are located on opposite sides of the second dielectric substrate 32, and the space between the second glass layer 31 and the first dielectric substrate 12 forms an air gap 2. That is, the second glass layer 31 is located on the side of the second dielectric substrate 32 closer to the air gap 2. The wave-transparent FSS layer 3 is formed by the stacking of the second glass layer 31, the second dielectric substrate 32, and the third glass layer 33 to achieve selective wave transmission and large-angle stability in the communication frequency band.

[0055] In some embodiments of the present invention, the second glass layer 31, the second dielectric substrate 32, and the third glass layer 33 are all square structures with a side length of 30 nm. The second glass layer 31 and the third glass layer 33 are both made of ITO conductive glass, and the conductivity of ITO conductive glass is 7.35 × 10⁻⁶. 5 ~ 1.47×10 6 The sheet resistance is 1~2 Ω / sq; the dielectric constant of the ITO conductive glass is 5~7, and the dielectric loss angle is 0.001~0.005. In some embodiments of the present invention, the second dielectric substrate 32 is made of environmentally friendly, high-transparency, lightweight and tough acrylic glass (PMMA); the dielectric constant of the acrylic glass is 1~3, and the dielectric loss angle is 0.001~0.005. Both the dielectric substrate and the ITO conductive glass are highly transparent materials under visible light.

[0056] In some embodiments of the present invention, the surface of the second glass layer 31 facing the air interlayer 2 has a second etched layer 311; the second etched layer 311 includes at least one annular groove 311-1 and a plurality of grooves 311-2, the plurality of grooves 311-2 being disposed around the periphery of the outermost annular groove 311-1. For example, as Figure 3 The annular groove 311-1 has one ring groove and four cutting grooves; the four cutting grooves are located at the four corners of the square structure. For example... Figure 4There are two annular grooves 311-1. The number of annular grooves is configured according to the actual size of the second glass layer 31. At least one annular groove 311-1 is etched on the surface of the second glass layer 31 to form a central patch 311-3 and at least one first annular patch 311-4, with the central patch 311-3 disposed within the first annular patch 311-4. A plurality of grooves 311-2 are etched on the surface of the second glass layer 31 to form a plurality of corner patches 311-5, with the corner patches 311-5 disposed around the periphery of the first annular patch 311-4. There are at least four corner patches 311-5; the shape of the corner patches 311-5 is preferably triangular, but other shapes of the corner patches 311-5 can also be provided.

[0057] In some embodiments of the present invention, the surface of the third glass layer 33 facing the second dielectric substrate 32 has a third etched layer 331; the third etched layer 331 has a second annular patch 331-3; specifically, the third etched layer 331 has a first etched surface 331-1 and a second etched surface 331-2, the second etched surface 331-2 being disposed within the first etched surface 331-1. The first etched surface 331-1 and the second etched surface 331-2 are etched on the surface of the third glass layer 33, and the second etched surface 331-2 is disposed within the first etched surface 331-1 to form a raised second annular patch 331-3; each FSS unit has a vertically arranged central axis, and the center of the first annular patch 311-4 and the center of the second annular patch 331-3 are both disposed on the same central axis.

[0058] In some embodiments of the present invention, the outer diameter of the second annular patch 331-3 is... l 2 Smaller than the inner diameter of the outermost first annular patch 311-4 l 1 The outer diameter of the second annular patch 331-3 l 2 Smaller than the inner diameter of the innermost first annular patch 311-4 l 3 The outer diameter of the second annular patch 331-3 l 2 It is equal to or less than the outer diameter of the center patch 311-3. In some embodiments of the present invention, such as... Figure 4 The outer diameter of the second annular patch 331-3 l 2 The outer diameter is smaller than that of the central patch 311-3. The thickness of the second annular patch 331-3 is... g 2 The thickness of the outermost annular groove 311-1 is g 1The thickness of the innermost annular groove 311-1 is g 3 The distance between the outermost first annular patch 311-4 located on the side of the groove and the angle between the outer edge and the nearest second glass layer 31 is r1, and the thickness of the groove is r2.

[0059] In some embodiments of the present invention, such as Figure 4 As shown, the unit size was obtained through optimization: the inner diameter of the outermost first annular patch 311-4 l 1 = 0.89P, outer diameter of the second annular patch 331-3 l 2 = 0.45P, the inner diameter of the innermost first annular patch 311-4 l 3 = 0.63P, the thickness of the outermost annular groove 311-1 g 1 =0.175P, the thickness of the second annular patch 331-3 g 2 = 0.068P, r 1 = 0.242P, r 2 = 0.059*P; where P = 30mm, representing the length of the structural unit.

[0060] The performance of the glass with energy saving and wireless communication frequency band enhancement functions provided in the above embodiments is tested below.

[0061] I. Communication Performance Testing

[0062] To verify the actual effect of the metamaterial structure provided in the above embodiments in communication, two sets of experiments were designed as a control.

[0063] The first group of experiments consisted of a cavity made of six pieces of Low-e glass, which was wrapped with tin foil tape to prevent electromagnetic waves from leaking in through the gaps.

[0064] Place two mobile phones, Phone1 and Phone2, inside and outside the cavity respectively (i.e., one phone inside and one outside the cavity). From outside the cavity, use Phone1 and Phone2 to make calls to the phones inside and outside the cavity, respectively. Figure 5 The (a) mark indicates that phone1 calls phone1 inside the cavity, and phone2 calls phone2 outside the cavity.

[0065] like Figure 5 As can be seen from (b) in the figure, the cavity constructed of Low-e glass has a strong signal shielding effect.

[0066] The second set of experiments: One piece of Low-e glass at the top of the cavity was replaced with the metamaterial structure provided in the above embodiment, while the remaining five surfaces still used Low-e glass, such as... Figure 6 (a) in the middle.

[0067] like Figure 6 (b) Place a mobile phone (phone1) inside the cavity and make a call to the phone inside the cavity from outside the cavity using the mobile phone (phone1).

[0068] like Figure 6 As shown in (b), a phone outside the cavity can successfully make a call to a phone inside the cavity, indicating that the mobile communication signal inside the cavity is functioning normally. The second set of experiments demonstrates that normal communication can be achieved between the internal and external devices, indicating that the metamaterial structure provided in this embodiment has good wave transmission performance in the 4G / 5G communication band. This verifies the potential of the metamaterial structure provided in this embodiment for 4G / 5G communication.

[0069] II. Thermal Insulation Performance Test

[0070] The cavity is made of 4.5mm thick insulating foam. The top surfaces of the three cavities are respectively composed of unetched ITO conductive glass (W / O Etching), etched ITO conductive glass (W / Etching), and normal glass. Figure 7 The etched ITO conductive glass is used to fabricate the metamaterial structure provided in this embodiment. The structure of the unetched ITO conductive glass is basically the same as the metamaterial structure provided in this embodiment, except that no etched layer is formed on each glass layer. The ordinary glass is Low-e glass. The temperature profile of the cavity made of ordinary glass is denoted as Ordinary, the temperature profile of the cavity made of etched ITO conductive glass is denoted as Etched, and the temperature profile of the cavity made of unetched ITO conductive glass is denoted as Un-Etched. The outdoor temperature profile is denoted as Outdoor for comparison. Figure 7 It uses three temperature sensor probes built into the cavity and an outdoor sensor to record data.

[0071] like Figure 8 The outdoor temperature ranged from 18°C ​​to 34°C on that day, measured from 9:00 AM to 8:30 PM. From 9:10 AM to 2:50 PM, during the entire heating process, the temperature difference between the cavity for etching the ITO conductive glass and the cavity for ordinary glass was maintained at 2-6°C, with a maximum temperature difference of 6.4°C; afterwards, during the cooling process, the temperature difference was maintained at 0.4-1.2°C.

[0072] like Figure 9The outdoor temperature that day was 20°C to 33°C, measured from 0:02 AM to 9:41 PM. From 9:11 AM to 3:01 PM, during the entire heating process, the cavity for etching ITO conductive glass and the cavity for ordinary glass maintained a temperature difference of 2-5°C, with a maximum temperature difference of 6.5°C; afterwards, during the cooling process, the temperature difference was maintained at 0-1°C.

[0073] The above-mentioned thermal insulation experiments revealed that the internal heating rate of the cavity increases in summer, and the cavity with a conventional glass top heats up significantly faster, reaching the heating state earlier. Furthermore, compared to the cavity with an etched ITO conductive glass top, it maintains a stable temperature difference of 2-6°C for approximately 6 hours a day, and a 6-7°C temperature difference during the two hottest hours of the day. This indicates that the infrared low-emissivity layer in the metamaterial structure provided in this embodiment effectively blocks some infrared heat from entering the cavity, while also reducing heat loss from the cavity, thus providing excellent thermal insulation.

[0074] III. Simulation Test of Transmission and Reflection Coefficients

[0075] Figure 10 Simulated transmission and reflection coefficient curves of the metamaterial structure provided for embodiments of the present invention. From... Figure 10 As can be seen from the embodiments of the present invention, the metamaterial structure has a wide transmission band within the communication frequency band and meets the requirements of the 5G (Sub-6G) frequency bands deployed by my country's three major operators; the insertion loss is less than 2.66dB in the 2.5-5 GHz band (transmittance > 54.2%), less than 1.54dB in the 2.75-4.8 GHz band (transmittance > 70%), and less than 1dB in the 3.25-4.65 GHz band (transmittance > 80%). The absolute bandwidth in the 2.5-5 GHz band is 2.5 GHz, and the relative bandwidth is 66.7%. Compared with the prior art 2 (Safari M, Kherani NP, Eleftheriades G V. “Multi-functional Metasurface: Visibly and RFTransparent, NIR Control and Low Thermal Emissivity”. Adv. Optical Mater. 2021, 2100176), the metamaterial structure provided by the embodiments of the present invention has a wider and better transmission performance at low frequencies.

[0076] IV. Simulation Experiments of Horizontal and Vertical Polarization

[0077] Figure 11 The transmission coefficient curves of horizontally and vertically polarized waves incident obliquely on the metamaterial structure provided in the embodiments of the present invention are shown. Figure 11It can be seen that the metamaterial structure provided in the embodiments of the present invention has polarization insensitivity and stable wave transmission performance under both polarizations.

[0078] Under horizontal polarization, the transmission band decreases with increasing incident angle, remaining relatively stable at 3 GHz, while the insertion loss gradually increases at 5 GHz. A relatively wide transmission band can be maintained within 40 degrees. Under vertical polarization, the transmission band remains essentially unchanged with increasing incident angle in the 2.5-4 GHz range. In the 4-5 GHz range, the resonant frequency gradually shifts to lower frequencies with increasing incident angle, and the transmission band decreases. Overall, the metamaterial structure provided in this embodiment of the invention exhibits a certain degree of angular stability.

[0079] V. Surface Emissivity Test

[0080] Figure 12 The surface emissivity of unetched ITO conductive glass, etched ITO conductive glass, and ordinary glass was tested using a TSS-5X emissivity meter.

[0081] Test results show that the surface emissivity of unetched ITO conductive glass is 0.13, while that of ordinary glass is 0.85. (This is achieved using the formula...) Substituting the emissivity (1 and 2) of the unetched ITO conductive glass and ordinary glass, as well as the duty cycles (f1 and f2) of the two etched sections, into the formula, the emissivity of the first infrared low-emissivity layer was calculated to be 0.3166. The measured emissivity of the etched ITO conductive glass surface was 0.32, and the calculated value is consistent with the test result. This indicates that the etched ITO conductive glass still has a low emissivity, which can reflect near-infrared waves and has the effect of blocking infrared radiation.

[0082] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A type of glass that combines energy saving and wireless communication frequency band enhancement, comprising periodically arranged FSS units, characterized in that, Each of the FSS units includes an infrared low-emission layer (1), an air interlayer (2), and a wave-transparent FSS layer (3) arranged in sequence. The infrared low-emission layer (1) includes a first glass layer (11) and a first dielectric substrate (12) stacked sequentially; the surface of the first glass layer (11) has a first etched layer (111); the first etched layer (111) includes multiple crisscrossing grid trenches (111-1). The wave-transparent FSS layer (3) includes a second glass layer (31), a second dielectric substrate (32) and a third glass layer (33) arranged in sequence. The surface of the second glass layer (31) has a second etched layer (311); the second etched layer (311) includes at least one annular groove (311-1) and a plurality of grooves (311-2), the plurality of grooves (311-2) being arranged around the outermost annular groove (311-1); The annular groove (311-1) is etched on the surface of the second glass layer (31) to form a central patch (311-3) and a first annular patch (311-4), wherein the central patch (311-3) is disposed within the first annular patch (311-4); A plurality of grooves (311-2) are etched on the surface of the second glass layer (31) to form a plurality of corner patches (311-5), and the plurality of corner patches (311-5) are disposed on the periphery of the first annular patch (311-4); The surface of the third glass layer (33) has a third etched layer (331); the third etched layer (331) has a second annular patch (331-3). Both the first dielectric substrate (12) and the second dielectric substrate (32) are made of plexiglass.

2. The glass with both energy-saving and wireless communication frequency band enhancement functions according to claim 1, characterized in that, Multiple mesh trenches (111-1) form an array of patch units (111-2) on the surface of the first glass layer (11).

3. The glass with both energy-saving and wireless communication frequency band enhancement functions according to claim 1, characterized in that, The corner patch (311-5) has at least 4 pieces; the corner patch (311-5) is triangular in shape.

4. The glass with both energy-saving and wireless communication frequency band enhancement functions according to claim 1, characterized in that, A first etched surface (331-1) and a second etched surface (331-2) are etched on the surface of the third glass layer (33), and the second etched surface (331-2) is disposed within the first etched surface (331-1) to form a second annular patch (331-3). The outer diameter of the second annular patch (331-3) is smaller than the inner diameter of the first annular patch (311-4).

5. The glass with both energy-saving and wireless communication frequency band enhancement functions according to claim 4, characterized in that, Each of the FSS units has a vertically arranged central axis, and the center of the first annular patch (311-4) and the center of the second annular patch (331-3) are both arranged on the central axis.

6. The glass with both energy-saving and wireless communication frequency band enhancement functions according to claim 4, characterized in that, The outer diameter of the second annular patch (331-3) is equal to or smaller than the outer diameter of the central patch (311-3).

7. The glass with both energy-saving and wireless communication frequency band enhancement functions according to claim 1, characterized in that, The first glass layer (11), the second glass layer (31), and the third glass layer (33) are all made of ITO conductive glass, and the conductivity of the ITO conductive glass is 7.35 × 10⁻⁶. 5 ~ 1.47×10 6 Sheet resistance is 1 ~ 2 Ω / sq; The dielectric constant of the ITO conductive glass is 5~7, and the dielectric loss angle is 0.001~0.

005.

8. The glass with both energy-saving and wireless communication frequency band enhancement functions according to claim 1, characterized in that, The dielectric constant of the plexiglass is 1 to 3, and the dielectric loss angle is 0.001 to 0.005.

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