Electromagnetic window and device with electromagnetic window

Abstract

The invention discloses an electromagnetic window and a device with the electromagnetic window, and relates to the technical field of electromagnetic shielding, and the electromagnetic window comprises a light-transmitting substrate, a shielding layer, a shielding layer and a feed circuit: the light-transmitting substrate is provided with two opposite mounting surfaces along the thickness direction of the light-transmitting substrate; the shielding layer is arranged on one mounting surface and is provided with a gap region penetrating along the thickness direction; the shielding layer is arranged on the other mounting surface, two metal polarity parts are formed corresponding to the gap area, a magnetic permeable gap is formed between the two metal polarity parts, and a switch shielding part is arranged in the magnetic permeable gap; the feed circuit is electrically connected to the two metal polarity parts; wherein the switch shielding part can be conducted when the feed line is powered on so as to shield the magnetic permeable gap, and can be disconnected when the feed line is powered off so as to expose the magnetic permeable gap. According to the technical scheme provided by the invention, the problem that light-transmitting glass of an existing building is difficult to selectively consider receiving requirements and shielding requirements of indoor users on external electromagnetic signals is solved.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic shielding, and in particular to an electromagnetic window and a device having the electromagnetic window. Background Art

[0002] The exterior walls of modern buildings are usually covered with large-scale translucent glass. In some special indoor workplaces, for the purpose of confidentiality or electromagnetic interference prevention, the translucent glass is usually designed with electromagnetic shielding. However, in the 5G era, nearly 85% of consumer mobile communication services will occur indoors in buildings. This translucent glass has a high penetration loss for 5G high-frequency communication signals including Sub-6GHz, low-orbit satellites, millimeter-wave communications, etc., resulting in poor electromagnetic signal reception for indoor users. This translucent glass has a single function and cannot selectively take into account the user's reception and shielding needs for external electromagnetic signals. Summary of the invention

[0003] The main purpose of the present invention is to provide an electromagnetic window and a device having the electromagnetic window, aiming to solve the problem that the light-transmitting glass of existing buildings is difficult to selectively take into account the reception needs and shielding needs of indoor users for external electromagnetic signals.

[0004] To achieve the above object, the present invention proposes an electromagnetic window comprising:

[0005] A light-transmitting substrate having two mounting surfaces opposite to each other along a thickness direction thereof;

[0006] A shielding layer, arranged on one of the mounting surfaces, the shielding layer having a gap area penetrating along the thickness direction;

[0007] a shielding layer, arranged on the other mounting surface, wherein the shielding layer has two metal polarity parts formed corresponding to the gap region, the two metal polarity parts are arranged opposite to each other to form a magnetically permeable gap therebetween, and a switch shielding part electrically connected to the two metal polarity parts is arranged in the magnetically permeable gap; and

[0008] A feeder circuit electrically connected to the two metal polarity parts;

[0009] The switch shielding portion can be turned on when the feeder line is powered on to shield the magnetically permeable gap, and can be turned off when the feeder line is powered off to expose the magnetically permeable gap.

[0010] In one embodiment, at least one of the shielding layer, the metal polarity portion, and the feeding line comprises a metal mesh structure.

[0011] In one embodiment, the thickness of the metal mesh structure is δ1, wherein 14um≤δ1≤16um.

[0012] In one embodiment, the width of the grid line of the metal grid structure is D1, wherein 48um≤D1≤52um.

[0013] In one embodiment, the thickness of the light-transmitting substrate is δ2, wherein 1.5 mm ≤ δ2 ≤ 1.7 mm; and / or,

[0014] The dielectric constant of the light-transmitting substrate is n, wherein 3.7≤n≤3.8; and / or,

[0015] The loss tangent value of the light-transmitting substrate is tanδ, wherein 0.00009≤tanδ≤0.00011.

[0016] In one embodiment, the gap area is provided in plurality;

[0017] The two metal polarity parts and the switch shielding parts correspond one to one to form a switch shielding group, and a plurality of the switch shielding groups are arranged corresponding to the gap area.

[0018] In one embodiment, a plurality of the switch shielding groups are arranged in an array in the corresponding mounting surface.

[0019] In one embodiment, a plurality of the switch shielding groups are arranged in parallel.

[0020] In one embodiment, the switch shielding portion includes a PIN switch diode.

[0021] The present invention further provides a device with an electromagnetic window, wherein the device with an electromagnetic window comprises the electromagnetic window described above.

[0022] The technical solution of the present invention can ensure the light transmittance of the electromagnetic window through a light-transmitting substrate, and a shielding layer is arranged on a mounting surface of the light-transmitting substrate. The gap area formed on the shielding layer corresponds to the magnetically permeable gap formed between the two metal polar parts. By powering off the feeding line, the switch shielding part in the magnetically permeable gap can be controlled to be disconnected to reveal the magnetically permeable gap. The external electromagnetic signal can pass through the electromagnetic window through the magnetically permeable gap and the gap area, thereby reducing the penetration loss of the electromagnetic signal and ensuring the strength of the electromagnetic signal received by the users indoors in the building; by powering on the feeding line, the two metal polar parts can be turned on through the switch shielding part, and the switch shielding part can form a shield for the magnetically permeable gap, so that the external electromagnetic signal is difficult to pass through the magnetically permeable gap. The shielding layer can shield the electromagnetic signal, thereby meeting the shielding requirements of the users indoors in the building for the external electromagnetic signal. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of an electromagnetic window provided by the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the plane structure of the middle occlusion layer;

[0026] Figure 3 for Figure 1 Schematic diagram of the planar structure of the middle shielding layer;

[0027] Figure 4 A schematic structural diagram of another embodiment of the electromagnetic window provided by the present invention;

[0028] Figure 5 The simulation results of the reflection coefficient of the electromagnetic window provided by the present invention in the ON and OFF modes of the PIN switch diode;

[0029] Figure 6 It is the simulation result of the transmission coefficient of the electromagnetic window provided by the present invention in the ON and OFF modes of the PIN switch diode.

[0030] Description of Figure Numbers:

[0031] 100. Electromagnetic window;

[0032] 1. Transparent substrate; 2. Shielding layer; 21. Gap area; 3. Shielding layer; 31. Metal polarity part 32. Switch shielding part; 32a. PIN switch diode; 33. Magnetic permeable gap; 4. Feeder line; 41. Main line; 42. Branch line.

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] The exterior walls of modern buildings are usually covered with large-scale translucent glass. In some special indoor workplaces, for the purpose of confidentiality or electromagnetic interference prevention, electromagnetic shielding design is usually performed on the translucent glass. However, in the 5G era, nearly 85% of consumer mobile communication services will occur indoors in buildings. This translucent glass has high penetration loss for 5G high-frequency communication signals including Sub-6GHz, low-orbit satellites, millimeter-wave communications, etc., resulting in poor electromagnetic signals received by indoor users. This translucent glass has a single function and cannot selectively take into account the user's reception and shielding needs for external electromagnetic signals, resulting in difficulties in deploying 5G communication technology in indoor spaces, which urgently needs to be overcome.

[0038] Therefore, the study of optically transparent electromagnetic windows (meta-windows) with electromagnetic permeability is of practical significance for solving the problem of high-frequency communication signal coverage from outdoor to indoor. In addition, due to the limitations of frequency domain and time domain resources, the further development of space resources is an inevitable development trend. In view of the common problems faced by smart cities, green buildings in intelligent transportation, new energy vehicles, drones and other industries in high-frequency wireless communications, the functional reuse (configurable) meta-window based on reconfigurable technology has important research value.

[0039] In view of this, the present invention provides an electromagnetic window, which can at least solve the problem that the light-transmitting glass of existing buildings is difficult to selectively take into account the indoor users' needs for receiving and shielding external electromagnetic signals. Figure 1A schematic diagram of the three-dimensional structure of an embodiment of an electromagnetic window provided by the present invention; Figure 2 for Figure 1 Schematic diagram of the plane structure of the middle occlusion layer; Figure 3 for Figure 1 Schematic diagram of the planar structure of the middle shielding layer; Figure 4 A schematic structural diagram of another embodiment of the electromagnetic window provided by the present invention; Figure 5 The simulation results of the reflection coefficient of the electromagnetic window provided by the present invention in the ON and OFF modes of the PIN switch diode; Figure 6 It is the simulation result of the transmission coefficient of the electromagnetic window provided by the present invention in the ON and OFF modes of the PIN switch diode.

[0040] See also Figures 1 to 3 In one embodiment of the present invention, the electromagnetic window 100 includes a light-transmitting substrate 1, a shielding layer 2, a blocking layer 3 and a feeding line 4, wherein the light-transmitting substrate 1 has two mounting surfaces opposite to each other along its thickness direction; the shielding layer 2 is arranged on one mounting surface, and the shielding layer 2 has a gap area 21 penetrating along the thickness direction; the blocking layer 3 is arranged on the other mounting surface, and the blocking layer 3 has two metal polarity parts 31 formed corresponding to the gap area 21, and the two metal polarity parts 31 are arranged opposite to each other to form a magnetically permeable gap 33 therebetween, and a switch blocking part 32 electrically connected to the two metal polarity parts 31 is arranged in the magnetically permeable gap 33; the feeding line 4 is electrically connected to the two metal polarity parts 31; wherein the switch blocking part 32 can be turned on when the feeding line 4 is powered on to block the magnetically permeable gap 33, and can be disconnected when the feeding line 4 is powered off to reveal the magnetically permeable gap 33.

[0041] It should be noted that the main function of the light-transmitting substrate 1 is to allow light to pass through and to provide two mounting surfaces for the shielding layer 2 and the blocking layer 3 to be set respectively. The material of the light-transmitting substrate 1 can be selected as quartz glass material or acrylic material, and the embodiment of the present invention does not limit this; there are many ways to form the shielding layer 2 and the blocking layer 3 on the light-transmitting substrate 1, for example, by laser etching or by attachment; during use, the light-transmitting direction of the light-transmitting substrate 1 is generally the thickness direction of itself, that is, from one mounting surface to another mounting surface, which can be from the shielding layer 2 to the blocking layer 3, or from the blocking layer 3 to the shielding layer 2, and this embodiment does not limit this.

[0042] The function of the "shielding layer 2" is mainly to shield electromagnetic signals, and its material is usually metal, such as copper, but of course it is not limited to this; the "gap area 21" refers to an area through which electromagnetic signals can pass. The gap area 21 generally includes a gap or channel whose size is larger than the wavelength of the electromagnetic signal. Of course, this embodiment does not limit the specific shape of the gap area 21.

[0043] The function of the "shielding layer 3" is to block and reveal the gap area 21 of the shielding layer 2, and the "two metal polarity parts 31 are arranged opposite to each other" means that the two metal polarity parts 31 are opposite to each other along the extension direction of the mounting surface, so that the magnetic permeable gap 33 formed therebetween can reveal the gap area 21 of the shielding layer 2. The magnetic permeable area can allow electromagnetic signals to pass through when there is no shielding, and can shield electromagnetic signals when there is shielding. This is specifically achieved by turning on and off the switch shielding part 32. The switch shielding part 32 is in In the magnetically permeable gap 33, its two ends are electrically connected to the metal polarity part 31, and the metal polarity part 31 is connected to the external circuit through the feeder line 4. When the feeder line 4 is energized, the two metal polarity parts 31 are electrically connected through the switch shielding part 32, so that a dipole can be formed. At this time, the magnetically permeable gap 33 is blocked. When the feeder line 4 is powered off, the switch shielding part 32 is disconnected, and the two metal polarity parts 31 are independent of each other, and the magnetically permeable gap 33 therein is revealed. There can be many types of such switch shielding parts 32, which are not limited in this embodiment.

[0044] The technical solution of the present invention can ensure the light transmittance of the electromagnetic window 100 through the light-transmitting substrate 1, and a shielding layer 2 is arranged on a mounting surface of the light-transmitting substrate 1. The gap area 21 formed on the shielding layer 2 corresponds to the magnetically permeable gap 33 formed between the two metal polarity parts 31. By powering off the feeder line 4, the switch shielding part 32 in the magnetically permeable gap 33 can be controlled to be disconnected to expose the magnetically permeable gap 33. The external electromagnetic signal can pass through the electromagnetic window 100 through the magnetically permeable gap 33 and the gap area 21, thereby reducing the penetration loss of the electromagnetic signal and ensuring the strength of the electromagnetic signal received by the users indoors in the building; by powering on the feeder line 4, the two metal polarity parts 31 can be turned on through the switch shielding part 32, and the switch shielding part 32 can shield the magnetically permeable gap 33, so that the external electromagnetic signal is difficult to pass through the magnetically permeable gap 33. The shielding layer 2 can shield the electromagnetic signal, thereby meeting the shielding requirements of the users indoors in the building for the external electromagnetic signal.

[0045] It is worth mentioning that the existence of the blocking layer 3 and the shielding layer 2 may have a certain influence on the light transmission effect of the light-transmitting substrate 1. In view of this, please refer to Figure 2 and Figure 3 In one embodiment, at least one of the shielding layer 2, the metal polarity portion 31, and the feeding line 4 includes a metal mesh structure.

[0046] It should be noted that the "metal grid structure" refers to a meshed metal grid structure, which is not elaborated in this embodiment; the three parallel technical solutions "shielding layer 2", "metal polarity part 31" and "feeder line 4" mentioned above can be set one by one, two by two, or at the same time. It can be understood that the effect of setting them at the same time is better.

[0047] According to the above technical solution, the shielding layer 2, the metal polarity portion 31, and the feeding line 4 are set to a metal grid structure. On the one hand, it does not affect the electromagnetic properties of the electromagnetic window 100 itself. On the other hand, it also reduces the duty cycle of the shielding layer 2, the metal polarity portion 31, and the feeding line 4, thereby improving the light transmittance performance of the electromagnetic window 100.

[0048] In one embodiment, the thickness of the metal mesh structure is δ1, wherein 14 um≤δ1≤16 um.

[0049] It should be noted that the thickness of the metal grid structure refers to the dimension along the thickness direction of the transparent substrate 1. The thickness δ1 of the metal grid structure can be 14um, 14.5um, 15um, 15.5um or 16um. Of course, it can also be any value in the above range. The embodiment of the present invention does not limit the specific thickness of the metal grid structure.

[0050] According to the above technical solution, by setting the thickness of the metal mesh structure between 14um and 16um, its thickness size is relatively moderate, which ensures that the metal mesh structure has sufficient electromagnetic shielding performance, while also preventing the metal mesh structure from being set too thin and prone to breakage.

[0051] Specifically, the thickness of the metal mesh structure is 15 um.

[0052] In one embodiment, the width of the mesh line of the metal mesh structure is D1, wherein 48um≤D1≤52um.

[0053] It should be noted that the metal mesh structure is usually composed of a plurality of grid lines arranged horizontally and vertically in an interlaced manner. The width of the grid line refers to the dimension along the extension direction of the mounting surface. The thickness D1 of the metal mesh structure can be 48um, 49um, 50um, 51um or 52um. Of course, it can also be any value in the above range. The embodiment of the present invention does not limit the specific width of the grid line.

[0054] According to the above technical solution, by setting the width of the grid line of the metal grid structure between 48um and 51um, its width size is relatively moderate, which ensures that the metal grid structure has sufficient electromagnetic shielding performance, while also preventing the metal grid structure from being set too narrow and prone to breakage.

[0055] Specifically, the width of the grid line body of the metal grid structure is 50 um.

[0056] In one embodiment, the thickness of the transparent substrate 1 is δ2, wherein 1.5mm≤δ2≤1.7mm; and / or the dielectric constant of the transparent substrate 1 is n, wherein 3.7≤n≤3.8; and / or the loss tangent value of the transparent substrate 1 is tanδ, wherein 0.00009≤tanδ≤0.00011.

[0057] It should be noted that the above three parallel technical features "the thickness of the transparent substrate 1 is δ2, wherein 1.5mm≤δ2≤1.7mm", "the dielectric constant of the transparent substrate 1 is n, wherein 3.7≤n≤3.8" and "the loss tangent value of the transparent substrate 1 is tanδ, wherein 0.00009≤tanδ≤0.00011" can be set one by one, two by two, or at the same time. It can be understood that the effect of setting them at the same time is better.

[0058] It should be noted that the thickness of the transparent substrate 1 refers to the dimension along the thickness direction of the transparent substrate 1. The thickness δ2 of the transparent substrate 1 can be 1.5mm, 1.55mm, 1.6mm, 1.65mm or 1.7mm, and of course it can also be any value in the above range. The specific thickness of the metal grid structure is not limited in the embodiment of the present invention; the dielectric constant n of the transparent substrate 1 can be 3.7, 3.75 or 3.8, and of course it can also be any value in the above range. The specific numerical value of the dielectric constant of the transparent substrate 1 is not limited in the embodiment of the present invention; the loss tangent value tanδ of the transparent substrate 1 can be 0.00009, 0.00010 or 0.00011, and of course it can also be any value in the above range. The specific numerical value of the loss tangent value of the transparent substrate 1 is not limited in the embodiment of the present invention.

[0059] In one embodiment, a plurality of gap regions 21 are provided; the two metal polarity portions 31 and the switch shielding portions 32 correspond one to one to form a switch shielding group, and a plurality of switch shielding groups are provided corresponding to the gap regions 21 .

[0060] It should be noted that the number of gap regions 21 is positively correlated with the magnetic permeability of the electromagnetic window 100. More gap regions 21 means stronger magnetic permeability of the electromagnetic window 100 and lower penetration loss of external electromagnetic signals. This embodiment does not limit the arrangement of multiple gap regions 21 and multiple switch shielding groups.

[0061] In one embodiment, a plurality of switch shielding groups are arranged in an array in the corresponding mounting surface. It is understandable that the arrangement of the array allows the plurality of gap areas 21 and the plurality of switch shielding groups to be arranged more densely, thereby minimizing the penetration loss of the electromagnetic window 100 for external electromagnetic signals.

[0062] In some embodiments, the plurality of gap regions 21 and the plurality of switch shielding groups may be arranged in a circular array. However, since the shapes of most building glass windows are rectangular, please refer to Figure 4 In one embodiment, the plurality of gap regions 21 and the plurality of switch shielding groups are arranged in a rectangular array.

[0063] It is worth mentioning that the plurality of switch shielding groups can be powered by separate feeder lines 4, but this arrangement may reduce the response speed of the electromagnetic window 100, thereby affecting the user's experience. In view of this, in one embodiment, refer to Figure 4 , multiple switch shielding groups are arranged in parallel.

[0064] It should be noted that “multiple switch shielding groups are arranged in parallel” means that the multiple switch shielding groups are controlled and operated by the same feeder line 4, and the switch shielding groups are connected to the two main lines 41 through the positive and negative branch lines 42 respectively.

[0065] According to the above technical solution, by setting multiple switch shielding groups in parallel, multiple switch shielding groups can be controlled to work simultaneously through the same feeder line 4, which is beneficial to improving the response speed of the electromagnetic window 100 and can simplify the structure of the feeder line 4.

[0066] See also Figure 4 In one embodiment, the feeder line 4 is arranged on the mounting surface corresponding to the shielding layer 3, and the feeder line 4 includes two main lines 41 extending in the first direction and opposite to each other in the second direction, and each main line 41 is formed with a plurality of branch lines 42 extending in the second direction, and the plurality of branch lines 42 on the two main lines 41 form a connecting branch line group in a one-to-one correspondence; each of the connecting branch line groups is provided with a plurality of switch shielding groups arranged in the second direction, and the two metal polarity parts 31 in the switch shielding group are respectively connected to the corresponding branch lines 42 in the connecting branch line group. In this way, the switch shielding groups can be provided with as many as possible to improve the electromagnetic transmission performance of the electromagnetic window 100, and the feeder line 4 can also provide power to multiple switch shielding groups at the same time.

[0067] There are many specific structural forms of the switch shielding part that can electrically conduct the two metal polarity parts 31 after power is turned on. For example, the switch shielding part can include a micro switch. In one embodiment, the switch shielding part 32 includes a PIN switch diode 32a. It should be noted that the structure of the PIN switch diode 32a is composed of three layers of P-type semiconductor, Intrinsic semiconductor and N-type semiconductor. The embodiment of the present invention does not elaborate on its specific structure and working principle.

[0068] In a specific implementation, the electromagnetic window 100 includes a light-transmitting substrate 1, a shielding layer 2, a blocking layer 3 and a feeder circuit 4: the light-transmitting substrate 1 has two mounting surfaces opposite to each other along its thickness direction; the shielding layer 2 is arranged on one mounting surface, and the shielding layer 2 has a gap area 21 penetrating along the thickness direction; the blocking layer 3 is arranged on the other mounting surface, and the blocking layer 3 has two metal polarity parts 31 formed corresponding to the gap area 21, and the two metal polarity parts 31 are arranged opposite to each other to form a magnetically permeable gap 33 therebetween, and a switch blocking part 32 electrically connected to the two metal polarity parts 31 is arranged in the magnetically permeable gap 33; the feeder circuit 4 is electrically connected to the two metal polarity parts 31; wherein the switch blocking part 32 can be turned on when the feeder circuit 4 is powered on to block the magnetically permeable gap 33, and can be disconnected when the feeder circuit 4 is powered off to reveal the magnetically permeable gap 33; the shielding layer 2, the metal polarity part 31, and the feeder circuit 4 At least one of them includes a metal grid structure; the thickness of the metal grid structure is δ1, wherein 14um≤δ1≤16um; the width of the grid line of the metal grid structure is D1, wherein 48um≤D1≤52um; the thickness of the transparent substrate 1 is δ2, wherein 1.5mm≤δ2≤1.7mm; the dielectric constant of the transparent substrate 1 is n, wherein 3.7≤n≤3.8; the loss tangent value of the transparent substrate 1 is tanδ, wherein 0.00009≤tanδ≤0.00011; a plurality of gap regions 21 are provided; two metal polarity portions 31 correspond one-to-one with the switch shielding portions 32 to form a switch shielding group, and a plurality of switch shielding groups are provided corresponding to the gap regions 21; a plurality of switch shielding groups are arranged in an array in the corresponding mounting surface; a plurality of switch shielding groups are arranged in parallel; the switch shielding portion 32 includes a PIN switch diode 32a.

[0069] The electromagnetic window 100 in the above embodiment is simulated. Figure 5 When the PIN switch diode 32a is in the ON mode, the magnetic permeable gap 33 between the two metal polar parts 31 is blocked, and the reflection coefficient S11 of the electromagnetic window 100 for the electromagnetic signal with a frequency near 12 GHz is between -1dB and -2dB. At this time, the reflection coefficient is large, and the electromagnetic window 100 has a high reflection shielding effect on the electromagnetic signal; when the PIN switch diode 32a is in the OFF mode, the magnetic permeable gap 33 between the two metal polar parts 31 is exposed, and the reflection coefficient S11 of the electromagnetic window 100 for the electromagnetic signal with a frequency near 12 GHz is between -13dB and -15dB. At this time, the reflection coefficient is small, and the electromagnetic window 100 has a transmission effect on the electromagnetic signal.

[0070] See also Figure 6When the PIN switch diode 32a is in the ON mode, the transmission coefficient S21 of the electromagnetic window 100 for the electromagnetic signal with a frequency near 12 GHz is about -20 dB. At this time, the transmission coefficient is small, and the electromagnetic window 100 has a high reflection shielding effect on the electromagnetic signal; when the PIN switch diode 32a is in the OFF mode, the transmission coefficient S21 of the electromagnetic window 100 for the electromagnetic signal with a frequency near 12 GHz is about 0 dB. At this time, the transmission coefficient is large, and the electromagnetic window 100 has a transmission effect on the electromagnetic signal.

[0071] The present invention also proposes a device with an electromagnetic window 100, which includes an electromagnetic window 100. The specific structure of the electromagnetic window 100 refers to the above embodiment. Since the device with the electromagnetic window 100 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the device with the electromagnetic window 100 can be a glass window of the exterior wall of a building, or a glass window of a vehicle, but is not limited to this; the device with the electromagnetic window 100 usually also has a circuit system for supplying power to the feeder line 4, and a control device for controlling the on and off of the circuit system. The user can control the electromagnetic window 100 to switch the shielding and transmission modes for external electromagnetic signals by operating the control device.

[0072] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electromagnetic window, characterized in that: include: A light-transmitting substrate having two mounting surfaces opposite to each other along a thickness direction thereof; A shielding layer, arranged on one of the mounting surfaces, the shielding layer having a gap area penetrating along the thickness direction; a shielding layer, arranged on the other mounting surface, wherein the shielding layer has two metal polarity parts formed corresponding to the gap region, the two metal polarity parts are arranged opposite to each other to form a magnetically permeable gap therebetween, and a switch shielding part electrically connected to the two metal polarity parts is arranged in the magnetically permeable gap; and A feeder circuit electrically connected to the two metal polarity parts; The switch shielding portion can be turned on when the feeder line is powered on to shield the magnetically permeable gap, and can be turned off when the feeder line is powered off to expose the magnetically permeable gap.

2. The electromagnetic window according to claim 1, characterized in that: At least one of the shielding layer, the metal polarity portion, and the feeding line includes a metal mesh structure.

3. The electromagnetic window according to claim 2, characterized in that: The thickness of the metal mesh structure is δ1, wherein 14um≤δ1≤16um.

4. The electromagnetic window according to claim 2, characterized in that: The width of the grid line body of the metal grid structure is D1, wherein 48um≤D1≤52um.

5. The electromagnetic window according to claim 1, characterized in that: The thickness of the light-transmitting substrate is δ2, wherein 1.5 mm ≤ δ2 ≤ 1.7 mm; and / or, The dielectric constant of the light-transmitting substrate is n, wherein 3.7≤n≤3.8; and / or, The loss tangent value of the light-transmitting substrate is tanδ, wherein 0.00009≤tanδ≤0.00011.

6. The electromagnetic window according to claim 1, characterized in that: The gap area is provided in plurality; The two metal polarity parts and the switch shielding parts correspond one to one to form a switch shielding group, and a plurality of the switch shielding groups are arranged corresponding to the gap area.

7. The electromagnetic window according to claim 6, characterized in that: The plurality of switch shielding groups are arranged in an array in the corresponding installation surface.

8. The electromagnetic window according to claim 6, characterized in that: A plurality of switch shielding groups are arranged in parallel.

9. The electromagnetic window according to claim 1, characterized in that: The switch shielding portion includes a PIN switch diode.

10. A device having an electromagnetic window, characterized in that: The device having an electromagnetic window comprises the electromagnetic window as claimed in any one of claims 1 to 9.

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