mushroom antenna

Abstract

The application provides a ceiling antenna, and relates to the technical field of mobile communication, which comprises a reflecting bottom plate with a via hole; a supporting plate fixed on the reflecting bottom plate, the plane of the supporting plate being perpendicular to the plane of the reflecting bottom plate; a radiation array adhered to the supporting plate; the radiation array comprises a first radiation body, the first radiation body is in a grid line structure, and the outer contour shape of the first radiation body is a rectangle with at least one cut corner; a joint is located on the side of the reflecting bottom plate away from the radiation array, the via hole exposes part of the area of the joint, and the joint is electrically connected to the radiation array through the via hole. The ceiling antenna has the grid line structure first radiation body, can improve the light transmission performance of the radiation array, thereby improving the beautification degree of the ceiling antenna, and better integrating the ceiling antenna into the surrounding environment. In addition, the ceiling antenna has a very wide working frequency band, can be applied to various communication systems, and has relatively wide application characteristics.

Description

Technical Field

[0001] This application relates to the field of mobile communication technology, and in particular to a ceiling-mounted antenna. Background Technology

[0002] With the continuous development of mobile communication technology, ceiling-mounted antennas have become an indispensable component in mobile communication devices. Besides higher electrical performance requirements, people are also increasingly demanding higher aesthetic appeal from ceiling-mounted antennas. However, current ceiling-mounted antenna technologies often suffer from narrow bandwidth and low aesthetic appeal.

[0003] Currently, there is an urgent need to design a new ceiling-mounted antenna to solve the above problems. Summary of the Invention

[0004] In a first aspect, embodiments of this application provide a ceiling-mounted antenna, comprising:

[0005] The reflective base plate has through holes;

[0006] A support plate is fixed to the reflective base plate, and the plane of the support plate is perpendicular to the plane of the reflective base plate.

[0007] A radiating element is attached to the support plate; wherein the radiating element includes a substrate and a first radiator located on the substrate, the first radiator having a grid-like structure, the substrate being located between the support plate and the first radiator, and the outer contour shape of the first radiator being a rectangle with at least one chamfer.

[0008] A connector is located on the side of the reflective base plate away from the radiating element. The via exposes a portion of the connector, and the connector is electrically connected to the radiating element through the via.

[0009] In some embodiments of this application, the ceiling-mounted antenna further includes an antenna cover, and the radiating element is located in the cavity formed by the reflective base plate and the antenna cover.

[0010] In some embodiments of this application, the reflective base plate includes a base plate and a reflective plate located on the base plate. The reflective plate includes a substrate and a grid-like reflective layer located on the substrate. The substrate is located between the base plate and the reflective layer, and the connector is located on the side of the base plate away from the reflective layer.

[0011] In some embodiments of this application, the base plate, the substrate, the support plate, the liner, and the radome are all made of light-transmitting insulating materials.

[0012] In some embodiments of this application, the first radiator is symmetrical about a reference plane; the reference plane passes through the geometric center of the connector and is perpendicular to the plane containing the reflective base plate.

[0013] In some embodiments of this application, the outer contour shape of the first radiator is a rectangle with four chamfered angles, two of which are isosceles right triangles.

[0014] In some embodiments of this application, the outer contour shape of the first radiator is a rectangle with four chamfered corners, all of which are arc-shaped chamfers, and the outer contour shape of the first radiator is a rounded rectangle.

[0015] In some embodiments of this application, the first radiator includes a hollow structure located in the middle of the first radiator. The outer contour of the hollow structure is any one of arc, polygon, or a shape formed by splicing arc and polygon.

[0016] In some embodiments of this application, the arc shape includes any one of a circle, an ellipse, a crescent shape, or a sector shape, and the polygon includes any one of a triangle, a quadrilateral, a pentagon, or a hexagon.

[0017] In some embodiments of this application, the radiating element further includes at least one second radiator located on the substrate, the second radiator being connected to the first radiator, and the second radiator having the same grid-like structure as the first radiator.

[0018] In some embodiments of this application, the outer contour shape of the second radiator is arc-shaped or polygonal.

[0019] In some embodiments of this application, the ceiling-mounted antenna further includes a fixing member, and the support plate is fixed together with the reflective base plate by the fixing member.

[0020] In some embodiments of this application, the fastener includes an L-shaped right-angle connector, and the fastener is made of a light-transmitting insulating material.

[0021] In some embodiments of this application, the ceiling-mounted antenna further includes an adhesive portion located between the substrate of the radiating element and the support plate, configured to bond the radiating element and the support plate together.

[0022] In some embodiments of this application, the cavity formed by the reflective base plate and the antenna cover is cylindrical or semi-ellipsoidal in shape.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 , Figure 2 , Figure 4 , Figure 5 These are schematic diagrams of the four types of ceiling antennas provided in the embodiments of this application;

[0026] Figure 3a A schematic diagram of the structure of a radiation array provided for an embodiment of this application;

[0027] Figure 3b A schematic diagram of the structure of a reflective substrate provided for an embodiment of this application;

[0028] Figure 6 A graph showing the change of VSWR as a function of operating frequency, provided for embodiments of this application;

[0029] Figure 7 A graph showing the gain as a function of operating frequency, provided for an embodiment of this application;

[0030] Figure 8 A radiation pattern of a ceiling-mounted antenna with a center frequency of 0.85 GHz is provided for an embodiment of this application;

[0031] Figure 9 A radiation pattern of a ceiling-mounted antenna with a center frequency of 1.70 GHz is provided for an embodiment of this application;

[0032] Figure 10 A radiation pattern of a ceiling-mounted antenna with a center frequency of 2.10 GHz is provided for an embodiment of this application;

[0033] Figure 11 A radiation pattern of a ceiling-mounted antenna with a center frequency of 2.50 GHz is provided for an embodiment of this application;

[0034] Figure 12Figures (1)-(8) in this application are schematic diagrams of the structures of eight types of radiating arrays provided in the embodiments of this application;

[0035] Figure 13 Figures (1)-(8) in this application are schematic diagrams of eight types of radiating arrays with hollowed-out structures provided in the embodiments of this application;

[0036] Figure 14 Figures (1)-(4) in this application are schematic diagrams of four types of radiation arrays including a first radiator and a second radiator provided in the embodiments of this application. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] For clarity, the thickness of regions and layers may be exaggerated in the figures. The same reference numerals in the figures denote the same or similar structures, and therefore their detailed descriptions are omitted. Furthermore, the figures are merely illustrative of this application and are not necessarily drawn to scale.

[0039] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this application. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific feature, structure, material, or characteristic may be included in any suitable manner in any one or more embodiments or examples.

[0040] In the embodiments of this application, the use of terms such as "first" and "second" to describe the same or similar items with essentially the same function and effect is only for the purpose of clearly describing the technical solution of the embodiments of this application, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0041] An embodiment of this application provides a ceiling-mounted antenna, with reference to... Figure 1 As shown, the ceiling-mounted antenna includes:

[0042] Reflective base plate 4 has through holes (unmarked);

[0043] Support plate 1 is fixed on reflective base plate 4, and the plane of support plate 1 is perpendicular to the plane of reflective base plate 4.

[0044] Radiation array 3 is attached to support plate 1; wherein, reference Figure 3a As shown, the radiating element 3 includes a substrate 31 and a first radiator 32 located on the substrate 31. The first radiator 32 has a grid-like structure. The substrate 31 is located between the support plate 1 and the first radiator 32, and the outer contour shape of the first radiator 32 is a rectangle with at least one chamfer.

[0045] Connector 6 is located on the side of the reflector plate 4 away from the radiating element 3, and a via exposes part of the area of ​​connector 6. Connector 6 is electrically connected to the radiating element 3 through the via.

[0046] In an exemplary embodiment, the material of the first radiator 32 is a metallic material, such as copper, titanium, or magnesium; or it may be glass fiber with a metallic coating; or it may be a resin with a conductive carbon material coated on its surface, wherein the conductive carbon material includes graphene, carbon fiber, or carbon nanotubes.

[0047] For example, the line width of the grid lines of the first radiator 32 can be in the range of 2μm-30μm, the spacing between adjacent grid lines of the first radiator 32 can be in the range of 50μm-200μm, and the thickness of the first radiator 32 along the direction perpendicular to the substrate 31 can be in the range of 1μm-10μm.

[0048] In an exemplary embodiment, the line width of the grid lines of the first radiator 32 may be set to be smaller than the spacing between adjacent grid lines of the first radiator 32, and the thickness of the first radiator 32 along the direction perpendicular to the substrate 31 may be set to be smaller than the line width of the grid lines of the first radiator 32.

[0049] In an exemplary embodiment, the orthographic projection of the outer contour of the first radiator 32 onto the substrate 31 may coincide with the outer contour of the substrate 31; or, referring to Figure 3a As shown, the orthographic projection of the outer contour of the first radiator 32 onto the substrate 31 is located within the outer contour of the substrate 31.

[0050] In an exemplary embodiment, the orthographic projection of the outer contour of the substrate 31 onto the support plate 1 may coincide with the outer contour of the support plate 1; or, the orthographic projection of the outer contour of the substrate 31 onto the support plate 1 may be located within the outer contour of the support plate 1.

[0051] It should be noted that the substrate 31 of the radiating element 3 is used to support the first radiator 32 of the grid-like structure and prevent damage to the grid-like structure. In order not to affect the light transmittance of the first radiator 32, the substrate 1 can be made of high-transmittance PET (Polyethylene Terephthalate) material or PI (Polyimide) material.

[0052] In practical applications, the grid-shaped first radiator 32 can be prepared by etching or imprinting.

[0053] The aforementioned radiating element 3 is attached to the support plate 1, which is a substrate with a certain mechanical strength. It further supports the first radiator 32 with a grid-like structure and the substrate 1, thereby improving the structural stability of the ceiling-mounted antenna.

[0054] In an exemplary embodiment, the thickness of the support plate 1 along the direction perpendicular to the radiating element 3 ranges from 1 mm to 3 mm.

[0055] In an exemplary embodiment, the material of the support plate 1 can be a transparent rigid plastic, such as PC (Polycarbonate), COP (Copolymers of Cycloolefin), or PMMA (Polymethyl Methacrylate); or the material of the support plate 1 can also be low-loss optical glass.

[0056] In the embodiments of this application, on the one hand, by setting the first radiator 32 as a grid-like structure and combining it with a light-transmitting substrate 31, a radiating array 3 with good light transmittance can be obtained; on the other hand, by setting the line width of the grid lines of the first radiator 32 to be smaller than the spacing between adjacent grid lines of the first radiator 32, the first radiator 32 can have a larger hollow area, thereby improving the light transmittance of the first radiator 32; furthermore, by setting the thickness of the first radiator 32 along the direction perpendicular to the substrate 31 to be smaller than the line width of the grid lines of the first radiator 32, since the smaller the thickness, the better the light transmittance, the light transmittance performance of the radiating array 3 is further improved. Without affecting the electrical performance of the radiating array 3, a transparent radiating array is obtained, thereby improving the aesthetics of the ceiling antenna and making it better integrated into the surrounding environment.

[0057] The meaning of the above-mentioned rectangle with at least one chamfer is: based on the rectangle, at least one of the four vertices of the rectangle is cut.

[0058] In an exemplary embodiment, when chamfering, the cutting line can be a straight line, resulting in a polygonal shape; or the cutting line can be an arc, resulting in a rectangle with at least one rounded corner.

[0059] In an exemplary embodiment, the radiating element 3 has four chamfers (all right-angled triangles), two of which are isosceles right triangles, as shown in the reference. Figure 2 As shown, ∠β = 45°, the other two tangent angles are the same, and ∠α = 32.9°.

[0060] In the embodiments of this application, by setting the outer contour shape of the first radiator 32 to a rectangle with at least one chamfer, the resonant point of the first radiator 32 can be significantly increased, thereby increasing the bandwidth of the ceiling antenna and enabling the ceiling antenna to have a wider range of applications.

[0061] In an exemplary embodiment, connector 6 can be a 50-ohm SMA (Small A Type) connector, which facilitates the connection of the ceiling antenna to other electrical components. It should be noted that the SMA connector is a typical microwave high-frequency connection interface, and the ceiling antenna cable receives input signals from the outside through the 50-ohm SMA connector.

[0062] The specific materials and colors of the aforementioned reflective base plate 4, support plate 1, substrate 31, and connector 6 are not limited here; they can be set according to the actual environmental requirements. In the embodiments of this application, in order to improve the aesthetics and concealment of the ceiling antenna, it is used as an example where all its materials are light-transmitting materials.

[0063] In the embodiments of this application, on the one hand, by setting the radiating element 3 of the ceiling antenna to have a grid-like linear structure first radiator 31, the light transmission performance of the radiating element 3 can be improved. Without affecting the electrical performance of the radiating element 3, a transparent radiating element 3 is obtained, thereby improving the aesthetics of the ceiling antenna and making it better integrated into the surrounding environment. On the other hand, by setting the outer contour shape of the first radiator 32 to be a rectangle with at least one chamfer, the resonant points of the first radiator 32 can be significantly increased, thereby increasing the bandwidth of the ceiling antenna and enabling the ceiling antenna to have a wider range of applications.

[0064] In some embodiments of this application, combined with Figure 1 and Figure 5 As shown, the ceiling-mounted antenna also includes an antenna cover 2, and the radiating element 3 is located in the cavity formed by the reflective base plate 4 and the antenna cover 2.

[0065] In an exemplary embodiment, the antenna cover 2 provides some protection for the radiating element 3. Furthermore, the antenna cover 2 can be made of a light-transmitting and insulating material, thereby improving the aesthetics of the ceiling-mounted antenna, enhancing its concealment, and its ability to blend into the environment.

[0066] It should be noted that the shape of the radome 2 and the shape of the reflective base plate 4 must be matched to a certain extent so that the radome 2 and the reflective base plate 4 can form a closed cavity structure. Assuming that the shapes of the two are matched, the specific shape of the radome 2 is not limited here.

[0067] For example, the structure formed by the reflector plate 4 and the radome 2 is cylindrical, prismatic, hemispherical, or semi-ellipsoidal. Among them, the prismatic shape can be triangular, quadrangular, pentagonal, or hexagonal.

[0068] In some embodiments of this application, reference is made to Figure 3b As shown, the reflective base plate 4 includes a base plate 41 and a reflective plate 42 located on the base plate 41. The reflective plate 42 includes a substrate (not marked) and a grid-like reflective layer 42 located on the substrate. The substrate is located between the base plate 41 and the reflective layer 42, as shown. Figure 2 As shown, the connector 6 is located on the side of the base plate 41 away from the reflective layer 42.

[0069] The substrate has a similar function to the substrate 31 of the radiation array 3 mentioned above, which is to support the grid-like linear structure and prevent it from being damaged. Here, the material of the substrate can be the same as that of the substrate 1 mentioned above.

[0070] The aforementioned base plate 41 is a substrate with a certain mechanical strength, which further supports the grid-like reflective layer 42 and the substrate, thereby improving the structural stability of the ceiling-mounted antenna.

[0071] In an exemplary embodiment, the thickness of the base plate 41 along the direction perpendicular to the reflector plate 42 ranges from 1 mm to 3 mm.

[0072] In an exemplary embodiment, the material of the base plate 41 may be a transparent rigid plastic, such as PC (Polycarbonate), COP (Copolymers of Cycloolefin), or PMMA (Polymethyl Methacrylate); or the material of the base plate 41 may be low-loss optical glass.

[0073] In an exemplary embodiment, the material of the mesh-like reflective layer 42 is a metallic material, such as copper, titanium, or magnesium; or it can be glass fiber with a metallic coating; or it can be a light-transmitting resin with a conductive carbon material coated on its surface, wherein the conductive carbon material includes graphene, carbon fiber, or carbon nanotubes.

[0074] For example, the line width of the grid lines of the reflective layer 42 can be in the range of 2μm-30μm, the spacing between adjacent grid lines of the reflective layer 42 can be in the range of 50μm-200μm, and the thickness of the reflective layer 42 along the direction perpendicular to the substrate can be in the range of 1μm-10μm.

[0075] In an exemplary embodiment, the line width of the grid lines of the reflective layer 42 may be set to be smaller than the spacing between adjacent grid lines of the reflective layer 42, and the thickness of the reflective layer 42 along the direction perpendicular to the substrate may be set to be smaller than the line width of the grid lines of the reflective layer 42.

[0076] In an exemplary embodiment, the orthographic projection of the outer contour of the mesh line reflective layer 42 onto the substrate may coincide with the outer contour of the substrate, or the orthographic projection of the outer contour of the mesh line reflective layer 42 onto the substrate may be located within the outer contour of the substrate.

[0077] In an exemplary embodiment, the orthographic projection of the outer contour of the substrate onto the base plate 41 may be set to be within the outer contour of the base plate 41, or the orthographic projection of the outer contour of the substrate onto the base plate 41 may be set to coincide with the outer contour of the base plate 41.

[0078] In the embodiments of this application, on the one hand, by setting the reflective layer 42 as a grid-like structure, combined with a light-transmitting substrate and a light-transmitting base plate 41, a reflective base plate 4 with good light transmittance can be obtained; on the other hand, by setting the line width of the grid lines of the reflective layer 42 to be smaller than the spacing between adjacent grid lines of the reflective layer 42, the reflective layer 42 can have a larger hollow area, thereby improving the light transmittance of the reflective layer 42; furthermore, by setting the thickness of the reflective layer 42 along the direction perpendicular to the substrate to be smaller than the line width of the grid lines of the reflective layer 42, since the smaller the thickness, the better the light transmittance, the light transmittance performance of the reflective base plate 4 is further improved. Without affecting the reflection and concentration of electrical signals by the reflective base plate 4, a transparent reflective base plate 4 is obtained, thereby improving the aesthetics of the ceiling antenna and making it better integrated into the surrounding environment.

[0079] In some embodiments of this application, the base plate 41, substrate, support plate 1, substrate 31 and radome 2 are all made of light-transmitting insulating materials.

[0080] For example, the material can be any one of PC (Polycarbonate), COP (Copolymers of Cycloolefin), or PMMA (Polymethyl Methacrylate).

[0081] In practical applications, to avoid the impact of differences in dielectric constant and dielectric loss tangent between different materials on the antenna's electrical signal, the materials used in the above structures are made of the same material.

[0082] In some embodiments of this application, reference is made to Figure 2 and Figure 3a As shown, the first radiator 32 is symmetrical about the reference plane; the reference plane passes through the geometric center of the connector 6 and is perpendicular to the plane where the reflective base plate 4 is located.

[0083] In some embodiments of this application, the outer contour shape of the first radiator 32 is a rectangle with four chamfered corners, two of which are isosceles right triangles.

[0084] In some embodiments of this application, the outer contour shape of the first radiator 32 is a rectangle with four chamfered corners, all of which are arc-shaped chamfers, and the outer contour shape of the first radiator 32 is a rounded rectangle.

[0085] In an exemplary embodiment, reference is made to Figure 12 As shown in Figures (3), (4), (7), and (8), the outer contour of the first radiator 32 is a rectangle with a chamfered corner; (Refer to...) Figure 12 As shown in Figures (1), (2), (5) and (6), the outer contour of the first radiator 32 is a rectangle with two chamfered corners; of course, the outer contour of the first radiator 32 can also be a rectangle with three or four chamfered corners, which can be adjusted according to the actual situation.

[0086] In some embodiments of this application, reference is made to Figure 13 As shown in the figures, the first radiator 32 includes a hollow structure located in the middle of the first radiator 32. The outer contour of the hollow structure is any one of arc, polygon, or a shape formed by splicing arc and polygon.

[0087] Exemplary, exemplary, arcuate includes, for example Figure 13 The circles and ovals shown in Figure (7) are as follows: Figure 13 The polygon includes any one of the crescent or sector shapes shown in Figure (4), and includes polygons such as... Figure 13 The triangle shown in Figure (8) is as follows: Figure 13 The quadrilateral shown in Figure (2) is as follows: Figure 13The pentagon shown in Figure (6) or as shown in the figure Figure 13 Any one of the hexagons shown in Figures (1) and (5).

[0088] For example, the arc shape also includes, Figure 13 The flag shape shown in Figure (3)

[0089] In some embodiments of this application, reference is made to Figure 14 As shown, the radiating element 3 also includes at least one second radiator 33 located on the substrate 31. The second radiator 33 is connected to the first radiator 32, and the second radiator 33 has the same grid-like structure as the first radiator 32.

[0090] In some embodiments of this application, the outer contour shape of the second radiator 33 is arc-shaped or polygonal.

[0091] In the embodiments of this application, by setting the radiating element 3, at least one second radiator 33 is also located on the substrate 31. The second radiator 33 is connected to the first radiator 32, which effectively increases the resonant potential of the radiating element, thereby effectively increasing the bandwidth of the ceiling antenna and enabling the ceiling antenna to have a wider range of applications.

[0092] In some embodiments of this application, reference is made to Figure 1 , Figure 2 , Figure 4 or Figure 5 As shown, the ceiling-mounted antenna also includes a fixing component 5, and the support plate 1 is fixed together with the reflective base plate 4 through the fixing component 5.

[0093] In some embodiments of this application, reference is made to Figure 5 As shown, the fixing component 5 includes an L-shaped right-angle connector to ensure that the plane where the support part 1 is located is perpendicular to the plane where the reflective base plate 4 is located, thereby improving the structural stability of the ceiling antenna.

[0094] In an exemplary embodiment, the material of the fastener 5 is a light-transmitting insulating material.

[0095] In an exemplary embodiment, the fastener 5 can be fixedly connected to the support plate 1 by screws.

[0096] In some embodiments of this application, the ceiling antenna further includes an adhesive portion located between the substrate 31 of the radiating element 3 and the support plate 1, configured to bond the radiating element 3 and the support plate 1 together.

[0097] In practical applications, since the first radiator 32 is disposed on the light-transmitting substrate 31, the substrate 31 and the support plate 1 are bonded together by the adhesive part, which can effectively improve the structural stability of the radiating array 3.

[0098] In an exemplary embodiment, the adhesive portion may be an adhesive, such as OCA (Optically Clear Adhesive).

[0099] In some embodiments of this application, the cavity formed by the reflective base plate 4 and the antenna cover 2 is cylindrical or semi-ellipsoidal in shape.

[0100] For example, the column can be as follows: Figure 1 The cylindrical shape shown indicates that the reflective base plate 4 is circular; alternatively, the cylindrical shape can be prismatic, in which case the reflective base plate 4 is polygonal.

[0101] In the embodiments of this application, a single radiating element 3 is employed. By chamfering the corners of the radiating element 3, a wider operating frequency band is achieved for the antenna. Simultaneously, an L-shaped fixing piece 5 connects the radiating element 3 to the reflective base plate 4, improving the overall stability of the antenna structure and expanding its application range. By setting the first radiator 32 and the reflective layer 42 as a grid-like structure, and combining this with using light-transmitting materials for other structures, the antenna exhibits excellent concealment, allowing it to blend seamlessly into transparent environments and effectively beautify the surroundings. Furthermore, the ceiling-mounted antenna provided in the embodiments of this application, due to its ultra-wide operating frequency, can be applied to various communication systems, possessing broad application characteristics.

[0102] The following provides a specific structure for a ceiling-mounted antenna, and explains its operating bandwidth and related radiation direction characteristics based on this structure.

[0103] refer to Figure 1 and Figure 2 As shown, the reflective layer 42 in the reflective base plate 4 and the first radiator 32 in the radiating array 3 are both metal mesh linear structures, and the metal is copper. The line width of the mesh lines ranges from 2μm to 30μm, the spacing between adjacent mesh lines ranges from 20μm to 250μm, and the thickness of the mesh linear structure ranges from 1μm to 10μm.

[0104] Both the substrate 1 and the base are made of PET film. The total thickness of the PET film used as the substrate 1 and the first radiator 32 ranges from 50 μm to 250 μm, and the total thickness of the PET film used as the base and the reflective layer 42 ranges from 50 μm to 250 μm.

[0105] The base plate 41 and the support plate 1 are made of the same material. Furthermore, the radome 2 and the fixing component 6 are made of the same material as the base plate 41, and all are made of PC (Polycarbonate), COP (Copolymers of Cycloolefin), PMMA (Polymethyl Methacrylate), or low-loss optical glass. The connector 6 is a 50-ohm SMA connector; the reflective base plate 4 is circular with a radius R = 90 mm; the radome 2 and the reflective base plate 4 form a cylindrical hollow structure, and the height of the radome 2 is 155 mm; the support plate 1 is rectangular with a short side a = 100 mm and a long side b = 100 mm; the shape of the first radiator 32 is as follows... Figure 2 The rectangle shown has four chamfered angles, two of which are isosceles triangles, and the other two are identical, with ∠β = 45° and ∠α = 32.9°. The transmittance of the radiating element 3 can reach 70%-88%.

[0106] Figure 6 A schematic diagram showing the operating frequency and VSWR of the ceiling-mounted antenna is provided. Figure 6 As shown in the curves, when the VSWR is less than 1.8, the ceiling antenna can operate in the frequency range of 0.80 GHz to 2.70 GHz; when the VSWR is less than 1.5, it can operate in two frequency bands: 0.80 GHz to 1.00 GHz and 1.48 GHz to 2.70 GHz. This ceiling antenna has a very wide operating frequency band and can be applied to various communication systems, exhibiting broad application characteristics.

[0107] Additionally, it should be noted that the full name of the standing wave ratio is Voltage Standing Wave Ratio (VSWR), which refers to the ratio of the voltage amplitude at the antinodes to the voltage amplitude at the troughs of a standing wave. It is also known as the standing wave coefficient or standing wave ratio. When the standing wave ratio is equal to 1, it means that the impedance at the input signal terminal and the impedance of the antenna are perfectly matched. At this time, all high-frequency energy is radiated by the antenna, and there is no energy reflection loss. When the standing wave ratio is infinite, it means total reflection, and no energy is radiated at all.

[0108] Figure 7 The graph showing the gain of the ceiling-mounted antenna as a function of frequency is displayed. Figure 7As can be seen, within the 0.80GHz-2.70GHz frequency band, the gain of this ceiling-mounted antenna is greater than or equal to 1.75dB. It should be noted that gain refers to the ratio of the power density of the signal produced by an actual antenna and an ideal radiating element at the same point in space, under the condition of equal input power. Gain is a physical quantity that measures the degree of increase in the intensity of the radiated signal.

[0109] Figure 8 The radiation pattern of the ceiling-mounted antenna at a center frequency of 0.85 GHz is shown. It should be noted that the antenna's radiation pattern is actually a three-dimensional spatial figure; the radiation patterns provided in the embodiments of this application are all based on the angle in the Z direction. Subsequently, a two-dimensional polar coordinate radiation pattern in the X and Y directions is provided. Figure 8 In and At that time, the outlines of the radiation patterns are similar and all approximate the shape of "∞". The symmetry of the radiation patterns is good and the radiation coverage is relatively large.

[0110] Figure 9 The radiation pattern of the ceiling-mounted antenna at a center frequency of 1.70 GHz is shown. and At that time, the outlines of the radiation patterns were all petal-shaped, and the similarity between the two was lower than that when the center frequency was 0.85 GHz, while the radiation range was slightly smaller than that when the center frequency was 0.85 GHz.

[0111] Figure 10 The radiation pattern of the ceiling-mounted antenna at a center frequency of 2.10 GHz is shown. and At that time, the outlines of the radiation patterns were both petal-shaped, and the two were highly similar, covering a large radiation range.

[0112] Figure 11 The radiation pattern of the ceiling-mounted antenna at a center frequency of 2.50 GHz is shown. and At that time, the outlines of the radiation patterns were both petal-shaped, and the two were highly similar. Figures 8-10 The similarity among them is low, and their coverage area is also reduced.

[0113] In the embodiments of this application, on the one hand, by setting the radiating element 3 of the ceiling antenna to have a grid-like structure first radiator 31, the light transmission performance of the radiating element 3 can be improved. Without affecting the electrical performance of the radiating element 3, a transparent radiating element 3 is obtained, thereby improving the aesthetics of the ceiling antenna and allowing it to better blend into the surrounding environment. On the other hand, by setting the outer contour shape of the first radiator 32 to a rectangle with at least one chamfer, the resonant points of the first radiator 32 can be significantly increased, thereby increasing the bandwidth of the ceiling antenna and enabling it to have a wider range of applications. In addition, by setting the reflective layer 42 to a grid-like structure, combined with a light-transmitting substrate and a light-transmitting base plate 41, a reflective base plate 4 with good light transmission can be obtained. Without affecting the reflection and concentration of electrical signals by the reflective base plate 4, a transparent reflective base plate 4 is obtained, thereby improving the aesthetics of the ceiling antenna and allowing it to better blend into the surrounding environment.

[0114] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A ceiling-mounted antenna, wherein, include: The reflective base plate has through holes; A support plate is fixed to the reflective base plate, and the plane of the support plate is perpendicular to the plane of the reflective base plate. A radiating element is attached to the support plate; wherein the radiating element includes a substrate and a first radiator located on the substrate, the first radiator having a grid-like structure, the substrate being located between the support plate and the first radiator, and the outer contour shape of the first radiator being a rectangle with at least one chamfer. A connector is located on the side of the reflective base plate away from the radiating element. The via exposes a portion of the connector, and the connector is electrically connected to the radiating element through the via.

2. The ceiling-mounted antenna according to claim 1, wherein, It also includes an antenna radome, wherein the radiating element is located in the cavity formed by the reflective base plate and the antenna radome.

3. The ceiling-mounted antenna according to claim 2, wherein, The reflective base plate includes a base plate and a reflective plate located on the base plate. The reflective plate includes a substrate and a grid-like reflective layer located on the substrate. The substrate is located between the base plate and the reflective layer. The connector is located on the side of the base plate away from the reflective layer.

4. The ceiling-mounted antenna according to claim 3, wherein, The base plate, the substrate, the support plate, the liner, and the radome are all made of light-transmitting insulating materials.

5. The ceiling-mounted antenna according to claim 1, wherein, The first radiator is symmetrical about a reference plane; the reference plane passes through the geometric center of the connector and is perpendicular to the plane containing the reflective base plate.

6. The ceiling-mounted antenna according to claim 5, wherein, The outer contour of the first radiator is a rectangle with four chamfered angles, two of which are isosceles right triangles.

7. The ceiling-mounted antenna according to claim 5, wherein, The outer contour of the first radiator is a rectangle with four chamfered corners, all of which are arc-shaped chamfers.

8. The ceiling-mounted antenna according to claim 1, wherein, The first radiator includes a hollow structure located in the middle of the first radiator. The outer contour of the hollow structure is any one of arc, polygon, or a shape formed by splicing arc and polygon.

9. The ceiling-mounted antenna according to claim 8, wherein, The arc shape includes any one of a circle, an ellipse, a crescent shape, or a sector shape, and the polygon includes any one of a triangle, a quadrilateral, a pentagon, or a hexagon.

10. The ceiling-mounted antenna according to claim 1, wherein, The radiation array further includes at least one second radiator located on the substrate, the second radiator being connected to the first radiator, and the second radiator having the same grid-like structure as the first radiator.

11. The ceiling-mounted antenna according to claim 10, wherein, The outer contour of the second radiator is arc-shaped or polygonal.

12. The ceiling-mounted antenna according to claim 1, wherein, It also includes a fastener, through which the support plate is fixed together with the reflective base plate.

13. The ceiling-mounted antenna according to claim 12, wherein, The fastener includes an L-shaped right-angle connector, and the fastener is made of a light-transmitting insulating material.

14. The ceiling-mounted antenna according to claim 1, wherein, It also includes an adhesive portion located between the substrate of the radiating array and the support plate, configured to bond the radiating array and the support plate together.

15. The ceiling-mounted antenna according to claim 2, wherein, The cavity formed by the reflective base plate and the radome is cylindrical or semi-ellipsoidal in shape.

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