Omnidirectional ceiling antenna

Abstract

The invention relates to an omni-directional ceiling antenna. The omni-directional ceiling antenna comprises a metal bottom plate; the radiating body is positioned on one side of the metal bottom plate along the thickness direction; one end of the non-metal supporting structure is connected with the radiator, the other end of the non-metal supporting structure is connected with the metal bottom plate, and the non-metal supporting structure is used for supporting the radiator on the metal bottom plate; and one end of the metal grounding piece is electrically connected with the radiator, and the other end of the metal grounding piece is electrically connected with the metal bottom plate. According to the omni-directional ceiling antenna, the roundness of a radiation pattern of the antenna and the supporting strength of the radiator can be ensured at the same time.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an omnidirectional ceiling antenna. Background Art

[0002] In order to enhance the wireless signal indoors, indoor antennas are increasingly used. Omnidirectional ceiling antennas are a common type of indoor antenna. Omnidirectional ceiling antennas generally include a radiator, a metal base plate, a metal grounding support plate, etc. Among them, one end of the metal grounding support plate is connected to the radiator, and the other end is connected to the metal base plate. On the one hand, the metal grounding support plate provides the function of DC grounding between the radiator and the metal base plate to improve the impedance matching of the low-frequency part of the antenna; on the other hand, it provides a support function for the radiator to fix the radiator to the metal grounding support plate.

[0003] If the width of the metal ground support sheet is too large, it will easily affect the electromagnetic environment around the radiator and block high-frequency electromagnetic waves, which will be more obvious at higher frequencies, thus adversely affecting the roundness of the antenna radiation pattern. If the width of the metal ground support sheet is too small, the support strength of the radiator is insufficient and the radiator is prone to skew.

[0004] Therefore, the omnidirectional ceiling antenna in the prior art has high requirements on the width dimension of the metal ground support plate, which makes it difficult to adjust to an appropriate width dimension, thereby making it difficult to simultaneously avoid the adverse effects on the roundness of the antenna radiation pattern and the problem of insufficient support strength.

[0005] In the omnidirectional ceiling antenna in the prior art, multiple metal grounding support plates are independent of each other. There is a fixed position between one end of each metal grounding support plate and the radiator, and a fixed position between the other end and the metal bottom plate. And the size of the metal grounding support plate cannot be too wide. Therefore, there is a tendency for shape and position deviations to occur between the metal grounding support plates, resulting in the metal grounding support plates being twisted, deformed, and not coplanar, which makes it difficult to accurately ensure the shape and position relationship between the radiator and the metal bottom plate when the metal grounding support is connected to the radiator and the metal bottom plate, which easily causes the radiator to be skewed.

[0006] In addition, in the prior art omnidirectional ceiling antenna, multiple metal grounding support plates are independent of each other, and both ends of each metal grounding support plate are fixed to the radiator and the metal bottom plate respectively. N metal grounding support plates need to be fixed and adjusted 2N times.

[0007] In the prior art omnidirectional ceiling antenna, in order to ensure the support strength of the radiator, the metal ground support plate needs to have a certain width, and there are shape and position tolerances between the metal ground support plates, the radiator, and the metal bottom plate. Therefore, after the metal ground support plates, the radiator, and the metal bottom plate are fixed, the ground support plate is prone to have large residual stress, resulting in poor antenna intermodulation indicators. Summary of the invention

[0008] Based on this, it is necessary to provide an omnidirectional ceiling antenna to address at least one of the above technical problems in the prior art.

[0009] An omnidirectional ceiling antenna, comprising:

[0010] Metal base plate;

[0011] A radiator, located on one side of the metal base plate along the thickness direction;

[0012] a non-metallic support structure, one end of which is connected to the radiator, and the other end of which is connected to the metal base plate, for supporting the radiator on the metal base plate; and

[0013] A metal grounding piece, one end of which is electrically connected to the radiator, and the other end of which is electrically connected to the metal bottom plate.

[0014] In one embodiment, the non-metallic support structure comprises:

[0015] an annular support portion, the annular support portion being sleeved on the radiator; and

[0016] A plurality of first connection parts are arranged at intervals along the circumference of the annular support part, one end of the first connection part is fixedly connected to the annular support part, and the other end is connected to the metal bottom plate.

[0017] In one embodiment, the non-metallic support structure further includes a plurality of second connection parts, which are arranged at intervals along the circumference of the annular support part, one end of the second connection part is fixedly connected to the annular support part, and the other end is connected to the radiator.

[0018] In one embodiment, along the circumference of the annular support portion, the first connection portions and the second connection portions are alternately arranged in sequence.

[0019] In one embodiment, a second latching protrusion is disposed at one end of the second connecting portion, and a second latching hole corresponding to the second latching protrusion is disposed on the radiator, and the second latching protrusion is engaged with the second latching hole.

[0020] In one embodiment, a first latching protrusion is disposed at one end of the first connecting portion, and a first latching hole corresponding to the first latching protrusion is disposed on the metal bottom plate, and the first latching protrusion is engaged with the first latching hole.

[0021] In one embodiment, the first clamping protrusion includes a first clamping segment and a second clamping segment connected to each other, the first clamping segment is located on a side of the second clamping segment close to the metal bottom plate, and the width of the first clamping segment is greater than the width of the second clamping segment;

[0022] The first clamping hole includes a first hole segment and a second hole segment that are connected. The first hole segment is located on one side of the second hole segment close to the center of the metal base plate. The width of the first hole segment is greater than the width of the second hole segment, so that the first clamping segment can pass through the first hole segment, and the second hole segment can prevent the first clamping segment and the first connecting portion from passing through; the second clamping segment can be inserted into the second hole segment.

[0023] In one embodiment, the metal base plate is provided with a plurality of first connection holes, and the radiator is provided with a plurality of second connection holes; one end of the plurality of metal grounding members is connected to the plurality of first connection holes one by one, and the other end of the plurality of metal grounding members is connected to the plurality of second connection holes one by one.

[0024] In one embodiment, the omnidirectional ceiling antenna further includes an antenna cover, wherein the antenna cover is disposed on the radiator, and one end of the metal base plate is fixedly connected to the antenna cover and closes an opening of the antenna cover.

[0025] In one embodiment, the omnidirectional ceiling antenna further includes a metal connector and a coaxial cable;

[0026] The center of the metal bottom plate is provided with a mounting hole, the metal connector is installed in the mounting hole and is electrically connected to the metal bottom plate, and the metal connector is provided with a wire through hole;

[0027] The coaxial cable is located on a side of the metal base plate facing away from the radiator; one end of the coaxial cable is passed through the wire through hole, the inner conductor of the coaxial cable is electrically connected to the radiator through the wire through hole, and the outer conductor of the coaxial cable is electrically connected to the metal connector.

[0028] In one embodiment, the omnidirectional ceiling antenna further includes an insulating member disposed between the radiator and the metal connecting member.

[0029] In one embodiment, an annular flange is provided on the outer periphery of the metal connecting member, and the annular flange abuts against a side of the metal bottom plate close to the radiator.

[0030] In one embodiment, the mounting hole is a non-circular hole, and the contour shape and size of the metal connecting piece are adapted to the mounting hole.

[0031] In one embodiment, the omnidirectional ceiling antenna also includes a mounting screw sleeve, the outer periphery of the metal connector is provided with an external thread, the internal thread of the mounting screw sleeve cooperates with the external thread of the metal connector, and the mounting screw sleeve abuts against the side of the metal base plate facing away from the radiator.

[0032] In one embodiment, the coaxial cable includes a cable body, a first cable segment, a second cable segment, and a third cable segment connected in sequence;

[0033] The insulating shell of the first cable segment is stripped off, and the outer conductor is exposed, the first cable segment is located on a side of the metal connector facing away from the radiator, and the outer conductor of the first cable segment is electrically connected to the metal connector;

[0034] The insulating shell and the outer conductor of the second cable segment are stripped off, and the insulating medium is exposed, and the second cable segment is inserted into the cable through hole;

[0035] The insulating shell, the outer conductor and the insulating medium of the third cable segment are stripped, and the inner conductor is exposed. The inner conductor of the third cable segment extends out of the wire through hole and is electrically connected to the radiator.

[0036] In one embodiment, the radiator includes a first part and a second part that are connected and coaxially arranged, and the first part is located on a side of the second part close to the metal bottom plate;

[0037] Along the direction where the radiator approaches the metal bottom plate, the outer diameter of the first part gradually decreases, and the outer diameter of the second part gradually increases or is uniform.

[0038] In one embodiment, the metal bottom plate is a circular bottom plate, the radiator is a rotating body, and the metal bottom plate and the radiator are coaxially arranged.

[0039] The above-mentioned omnidirectional ceiling antenna is connected to the radiator through one end of the non-metallic support structure and the other end is connected to the metal bottom plate, so that the radiator is supported on the metal bottom plate. One end of the metal grounding piece is electrically connected to the radiator, and the other end is electrically connected to the metal bottom plate, so as to realize the function of DC grounding of the radiator and the metal bottom plate. Compared with the prior art, the DC grounding function and the supporting function are decomposed into both the metal grounding piece and the non-metallic supporting structure. The metal grounding piece only needs to realize the grounding function, and its size can be made as narrow as possible, so as to avoid its influence on the electromagnetic environment around the radiator as much as possible, and avoid blocking high-frequency electromagnetic waves as much as possible, so as to avoid adverse effects on the roundness of the antenna radiation pattern as much as possible. At the same time, the support of the radiator is realized by the non-metallic support structure, and the size of the non-metallic support structure can be appropriately made wide to provide sufficient support strength for the radiator. Since the non-metallic support structure is made of non-metallic material, it has little effect on the electromagnetic environment around the radiator, and thus has little adverse effect on the roundness of the antenna radiation pattern. In this way, the above-mentioned omnidirectional ceiling antenna can simultaneously ensure the roundness of the antenna radiation pattern and the support strength of the radiator.

[0040] Compared with the prior art, the non-metallic support structure in the embodiment of the present application is an integrated structure. The non-metallic support structure is clamped with the metal base plate through the first clamping protrusion on the first connecting part, and is clamped with the radiator through the second clamping protrusion on the second connecting part. In this way, the non-metallic support structure is a whole, and the size can be appropriately widened to ensure the support strength, so that the shape and position relationship between the first connecting part and the second connecting part can be ensured, and then the shape and position relationship between the radiator and the metal base plate can be ensured, and the radiator is ensured not to be skewed.

[0041] Compared with the prior art, the non-metallic support structure in the embodiment of the present application is an integrated structure. It is only necessary to clamp the non-metallic support structure with the metal base plate through the first clamping protrusion on the first connecting part, and then clamp it with the radiator through the second clamping protrusion on the second connecting part. In this way, only two clamping operations are required to ensure the relative fixation of the radiator and the metal base plate. Finally, the metal grounding piece can be connected when the radiator and the metal base plate are relatively fixed, which is more convenient to operate.

[0042] The shape and position tolerances between the metal grounding support component and the radiator and the metal base plate of the present application are small, and the size of the metal grounding component is small, so the residual stress is small, and thus the intermodulation index of the antenna is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 The figure is a schematic structural diagram of an omnidirectional ceiling antenna according to an embodiment.

[0044] Figure 2 for Figure 1 Schematic diagram of the non-metallic support structure in .

[0045] Figure 3 for Figure 1 Schematic diagram of the structure of the radiator.

[0046] Figure 4 for Figure 1 A top view of the metal base plate in the figure.

[0047] Figure 5 A half-section view of an omnidirectional ceiling antenna according to an embodiment.

[0048] Figure 6 for Figure 5 A partial enlarged view of the cross-sectional area in FIG.

[0049] Figure 7 The figure is a top view of the positional relationship among the metal connector, the annular flange and the inner conductor of an embodiment.

[0050] FIG8( a ) is a schematic diagram of a radiator according to an embodiment.

[0051] FIG8( b ) is a schematic diagram of a radiator according to another embodiment.

[0052] FIG8( c ) is a schematic diagram of a radiator according to yet another embodiment.

[0053] FIG8( d ) is a schematic diagram of a radiator according to yet another embodiment.

[0054] Description of reference numerals:

[0055] 100, radiator; 101, second clamping hole; 102, second connecting hole; 110, first part; 120, second part;

[0056] 200, metal bottom plate; 201, first clamping hole; 2011, first hole section; 2012, second hole section; 202, first connecting hole; 203, mounting hole;

[0057] 300, non-metallic support structure; 310, annular support portion; 320, first connecting portion; 330, second connecting portion; 340, first clamping protrusion; 341, first clamping segment; 342, second clamping segment; 350, second clamping protrusion;

[0058] 400, metal grounding parts;

[0059] 500, metal connector; 501, wire through hole; 510, annular flange;

[0060] 600, coaxial cable; 610, insulating shell; 620, outer conductor; 630, insulating medium; 640, inner conductor; 600a, cable body; 600b, first cable segment; 600c, second cable segment; 600d, third cable segment;

[0061] 700, insulation parts;

[0062] 800, mounting screw sleeve; 810, mounting nut;

[0063] 900, coaxial connector. DETAILED DESCRIPTION

[0064] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0065] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0066] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0068] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0069] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0070] Please refer to Figure 1 An embodiment of the present application provides an omnidirectional ceiling antenna, which includes: a radiator 100, a metal base plate 200, a non-metallic support structure 300, and a metal grounding member 400.

[0071] The radiator 100 is located on one side of the metal base plate 200 along the thickness direction. Optionally, the metal base plate 200 is a circular base plate. The radiator 100 is a rotating body structure. The metal base plate 200 and the radiator 100 are coaxially arranged. The omnidirectional ceiling antenna can be a single cone omnidirectional ceiling antenna.

[0072] One end of the non-metallic support structure 300 is connected to the radiator 100, and the other end is connected to the metal base plate 200, so as to support the radiator 100 on the metal base plate 200. In actual use, the radiator 100 is located above the metal base plate 200. The upper end of the non-metallic support structure 300 is connected to the radiator 100, and the lower end is connected to the metal base plate 200, so that the weight of the radiator 100 can be supported by the non-metallic support structure 300, so that the radiator 100 is reliably fixed to the metal base plate 200. The material used for the non-metallic support structure 300 is, for example, plastic. The selected plastic material is, for example, ABS (acrylonitrile-styrene-butadiene copolymer), POM (polyoxymethylene), PS (polystyrene), etc.

[0073] One end of the metal grounding member 400 is electrically connected to the radiator 100, and the other end is electrically connected to the metal base plate 200. The metal grounding member 400 provides a DC grounding function for the radiator 100 and the metal base plate 200 to improve the impedance matching of the low-frequency part of the antenna. The metal grounding member 400 can be in the shape of a thread, a line, a sheet, etc.

[0074] The above-mentioned omnidirectional ceiling antenna is connected to the radiator 100 through one end of the non-metallic support structure 300, and the other end is connected to the metal base plate 200, so that the radiator 100 is supported on the metal base plate 200. One end of the metal grounding member 400 is electrically connected to the radiator 100, and the other end is electrically connected to the metal base plate 200, so as to realize the function of DC grounding of the radiator 100 and the metal base plate 200. Compared with the prior art, the DC grounding function and the supporting function are decomposed into both the metal grounding member 400 and the non-metallic support structure 300. The metal grounding member 400 only needs to realize the grounding function, and its size can be made as narrow as possible, so as to avoid its influence on the electromagnetic environment around the radiator 100 as much as possible, and avoid blocking high-frequency electromagnetic waves as much as possible, so as to avoid adverse effects on the roundness of the antenna radiation pattern as much as possible. At the same time, the radiator 100 is supported by the non-metallic support structure 300, and the size of the non-metallic support structure 300 can be appropriately made wide to provide sufficient support strength for the radiator 100. Since the non-metallic support structure 300 is made of non-metallic material, it has little impact on the electromagnetic environment around the radiator 100, and thus has little adverse impact on the roundness of the antenna radiation pattern. In this way, the above-mentioned omnidirectional ceiling antenna can simultaneously ensure the roundness of the antenna radiation pattern and the support strength of the radiator 100.

[0075] Please refer to Figure 2 In one embodiment, the non-metallic support structure 300 includes an annular support portion 310 and a plurality of first connection portions 320. The annular support portion 310 is sleeved on the radiator 100. The plurality of first connection portions 320 are arranged at intervals along the circumference of the annular support portion 310, one end of the first connection portion 320 is fixedly connected to the annular support portion 310, and the other end is connected to the metal bottom plate 200.

[0076] By arranging the plurality of first connection parts 320 at intervals along the circumference of the annular support part 310, the radiator 100 can be well supported. Since one end of the plurality of first connection parts 320 is fixedly connected to the annular support part 310, the annular support part 310 and the plurality of first connection parts 320 can be pre-processed into an integrated structure. Moreover, since the non-metallic support structure 300 is an integral body, position deviation between the plurality of first connection parts 320 can be avoided, thereby effectively avoiding position deviation and skew of the radiator 100.

[0077] Optionally, the width of the first connection portion 320 is greater than the width of the metal grounding member 400 .

[0078] Please refer to Figure 2 In one embodiment, the non-metallic support structure 300 further includes a plurality of second connection portions 330 , which are arranged at intervals along the circumference of the annular support portion 310 , one end of the second connection portion 330 is fixedly connected to the annular support portion 310 , and the other end is connected to the radiator 100 .

[0079] By arranging a plurality of second connection parts 330 at intervals along the circumference of the annular support part 310 , one end of the second connection part 330 is fixedly connected to the annular support part 310 and the other end is connected to the radiator 100 , which can further improve the support strength of the radiator 100 .

[0080] Since one end of the plurality of second connection parts 330 is fixedly connected to the annular support part 310, the annular support part 310, the plurality of first connection parts 320 and the plurality of second connection parts 330 can be pre-processed into an integrated structure. Since the non-metallic support structure 300 is an integral body, position deviation between the plurality of second connection parts 330 can be avoided, thereby effectively avoiding position deviation and skew of the radiator 100.

[0081] Optionally, the width of the second connection portion 330 is greater than the width of the metal grounding member 400 .

[0082] In one embodiment, the inner circumference of the annular support portion 310 is adapted to the outer circumference of the radiator 100. Specifically, the inner circumference of the annular support portion 310 matches the shape of the outer circumference of the radiator 100, and the inner diameter of the inner circumference of the annular support portion 310 matches the inner diameter of the outer circumference of the radiator 100, so that the annular support portion 310 and the radiator 100 can be positioned with each other and cooperate stably, which is conducive to good support and fixation of the radiator 100.

[0083] Please refer to Figure 2 In one embodiment, the first connection parts 320 and the second connection parts 330 are arranged alternately along the circumference of the annular support part 310. Thus, the first connection parts 320 and the second connection parts 330 are distributed at multiple points along the circumference of the annular support part 310, which can achieve good support for each position of the radiator 100 in the circumference.

[0084] Please combine Figure 2 and Figure 3 In one embodiment, a first latching protrusion 340 is provided at one end of the first connecting portion 320, and a first latching hole 201 corresponding to the first latching protrusion 340 is provided on the metal base plate 200. The first latching protrusion 340 is engaged with the first latching hole 201, thereby facilitating the connection of one end of the first connecting portion 320 with the metal base plate 200.

[0085] Please combine Figure 2 and Figure 3 In one embodiment, the first clamping protrusion 340 includes a first clamping segment 341 and a second clamping segment 342 connected to each other, and the first clamping segment 341 is located on a side of the second clamping segment 342 close to the metal bottom plate 200 (at Figure 2 The width of the first clamping section 341 is greater than the width of the second clamping section 342. The width of the first connecting portion 320 is greater than the width of the second clamping section 342.

[0086] The first clamping hole 201 includes a first hole section 2011 and a second hole section 2012 that are connected. The first hole section 2011 is located on a side of the second hole section 2012 close to the center of the metal bottom plate 200. The width of the first hole section 2011 is greater than the width of the second hole section 2012, so that the first clamping section 341 can pass through the first hole section 2011, and the second hole section 2012 can prevent the first clamping section 341 and the first connecting portion 320 from passing through. The second clamping section 342 can be inserted into the second hole section 2012.

[0087] The width direction described in this embodiment means the circumferential direction along the annular support portion 310. When the first clamping protrusion 340 is assembled with the first clamping hole 201, the first clamping segment 341 is first moved through the first hole segment 2011 to the side of the metal bottom plate 200 facing away from the radiator 100. At this time, the second clamping segment 342 is located in the first hole segment 2011. Then the first clamping protrusion 340 is moved to move the second clamping segment 342 from the first hole segment 2011 to the second clamping segment 342. At this time, the first clamping protrusion 340 is located on the side of the metal bottom plate 200 facing away from the radiator 100 and is blocked by the second hole segment 2012. At the same time, the first connecting portion 320 is located on the side of the metal bottom plate 200 close to the radiator 100 and is blocked by the second hole segment 2012, so that the metal bottom plate 200 is clamped between the first connecting portion 320 and the first clamping protrusion 340. Furthermore, since the first connection portion 320 and the first latching protrusion 340 are blocked by the second hole section 2012 , they will not be separated from the metal bottom plate 200 , thereby achieving a reliable connection between the first connection portion 320 and the metal bottom plate 200 .

[0088] In other embodiments, the first connection portion 320 and the metal base plate 200 may be connected in other ways, such as rivet connection, screw connection, etc.

[0089] Please combine Figure 2 and Figure 4 In one embodiment, a second clamping protrusion 350 is provided at one end of the second connection portion 330, and a second clamping hole 101 corresponding to the second clamping protrusion 350 is provided on the radiator 100, and the second clamping protrusion 350 is clamped and matched with the second clamping hole 101. Thus, the connection between the second connection portion 330 and the radiator 100 is conveniently realized.

[0090] In other embodiments, the second connection portion 330 and the metal base plate 200 may be connected in other ways, such as rivet connection, screw connection, etc.

[0091] It is understandable that the material used for the non-metallic support structure 300 should have a certain support strength and be able to undergo a certain elastic deformation. For example, a plastic material can achieve such a function. In this way, when the first clamping protrusion 340 is matched with the first clamping hole 201, the first clamping protrusion 340 can enter the first clamping hole 201 through the slight elastic deformation of the end of the first connecting portion 320 close to the first clamping protrusion 340, and then after the elastic deformation is restored, the first clamping protrusion 340 and the first clamping hole 201 can be reliably matched. Similarly, when the second clamping protrusion 350 is matched with the second clamping hole 101, the second clamping protrusion 350 can enter the second clamping hole 101 through the slight elastic deformation of the end of the second connecting portion 330 close to the second clamping protrusion 350, and then after the elastic deformation is restored, the second clamping protrusion 350 and the second clamping hole 101 can be reliably matched.

[0092] Optionally, the non-metallic support structure 300 may be an integral injection-molded structure.

[0093] In the omnidirectional ceiling antenna in the prior art, multiple metal grounding support plates are independent of each other. There is a fixed position between one end of each metal grounding support plate and the radiator, and a fixed position between the other end and the metal bottom plate. And the size of the metal grounding support plate cannot be too wide. Therefore, there is a tendency for shape and position deviations to occur between the metal grounding support plates, resulting in the metal grounding support plates being twisted, deformed, and not coplanar, which makes it difficult to accurately ensure the shape and position relationship between the radiator and the metal bottom plate when the metal grounding support is connected to the radiator and the metal bottom plate, which easily causes the radiator to be skewed.

[0094] Compared with the prior art, the non-metallic support structure 300 in the embodiment of the present application is an integrated structure. The non-metallic support structure 300 is clamped with the metal base plate 200 through the first clamping protrusion 340 on the first connecting portion 320, and is clamped with the radiator 100 through the second clamping protrusion 350 on the second connecting portion 330. In this way, the non-metallic support structure 300 is a whole, and the size can be appropriately widened to ensure the support strength, so that the shape and position relationship between the first connecting portion 320 and the second connecting portion 330 can be ensured, and then the shape and position relationship between the radiator and the metal base plate can be ensured, and the radiator is ensured not to be skewed.

[0095] In addition, in the prior art omnidirectional ceiling antenna, multiple metal grounding support plates are independent of each other, and both ends of each metal grounding support plate are fixed to the radiator and the metal bottom plate respectively. N metal grounding support plates need to be fixed and adjusted 2N times.

[0096] Compared with the prior art, the non-metallic support structure 300 in the embodiment of the present application is an integrated structure. It is only necessary to clamp the non-metallic support structure 300 with the metal bottom plate 200 through the first clamping protrusion 340 on the first connecting portion 320, and then clamp it with the radiator 100 through the second clamping protrusion 350 on the second connecting portion 330. In this way, only two clamping operations are required to ensure that the radiator 100 and the metal bottom plate 200 are relatively fixed. Finally, the metal grounding member 400 can be connected when the radiator 100 and the metal bottom plate 200 are relatively fixed, which is more convenient to operate.

[0097] In the prior art omnidirectional ceiling antenna, in order to ensure the support strength of the radiator, the metal grounding support sheet needs to ensure a certain width, so the width is relatively large (relative to the metal grounding member 400 of the present application), and there are shape and position tolerances between the metal grounding support sheets, the radiator, and the metal bottom plate. Therefore, after the metal grounding support sheets, the radiator, and the metal bottom plate are fixed, the grounding support sheet is prone to have a large residual stress, resulting in a deterioration of the antenna intermodulation index.

[0098] However, the shape and position tolerances between the metal grounding support component and the radiator and the metal base plate of the present application are small, and the size of the metal grounding component 400 is small, so the residual stress is small, and thus the intermodulation index of the antenna is better.

[0099] Please combine Figure 1 , Figure 3 , Figure 4 In one embodiment, a plurality of first connection holes 202 are provided on the metal bottom plate 200, and a plurality of second connection holes 102 are provided on the radiator 100. One ends of the plurality of metal grounding members 400 are connected to the plurality of first connection holes 202 one by one, and the other ends of the plurality of metal grounding members 400 are connected to the plurality of second connection holes 102 one by one, so that one end of the metal grounding member 400 is electrically connected to the metal bottom plate 200, and the other end is electrically connected to the radiator 100.

[0100] One end of the metal grounding member 400 may be connected to the first connection hole 202 by welding, riveting, etc. The other end of the metal grounding member 400 may be connected to the second connection hole 102 by welding, riveting, etc.

[0101] In one embodiment, the omnidirectional ceiling antenna further includes an antenna cover (not shown), which is disposed on the radiator 100 , and one end of the metal base plate 200 is fixedly connected to the antenna cover and closes the opening of the antenna cover.

[0102] Please combine Figure 3 , Figures 5 to 7In one embodiment, the omnidirectional ceiling antenna further includes a metal connector 500 and a coaxial cable 600. The coaxial cable 600 includes an inner conductor 640, an insulating medium 630, an outer conductor 620, and an insulating shell 610 which are sequentially arranged from the inside to the outside.

[0103] The center of the metal bottom plate 200 is provided with a mounting hole 203, the metal connector 500 is installed in the mounting hole 203 and is electrically connected to the metal bottom plate 200, and the metal connector 500 is provided with a wire through hole 501. The coaxial cable 600 is located on the side of the metal bottom plate 200 facing away from the radiator 100. One end of the coaxial cable 600 is passed through the wire through hole 501, and the inner conductor 640 of the coaxial cable 600 passes through the wire through hole 501 and is electrically connected to the radiator 100. The outer conductor 620 of the coaxial cable 600 is electrically connected to the metal connector 500.

[0104] In this embodiment, the inner conductor 640 of the coaxial cable 600 is electrically connected to the radiator 100 through the wire through hole 501 by the metal connector 500 installed in the center of the metal base plate 200. At the same time, since the metal connector 500 is installed in the mounting hole 203 and electrically connected to the metal base plate 200, the outer conductor 620 of the coaxial cable 600 is electrically connected to the metal connector 500, thereby achieving the electrical connection between the outer conductor 620 of the coaxial cable 600 and the metal base plate 200. In this way, the omnidirectional ceiling antenna can be connected to an external device through the coaxial connector 900 at the other end of the coaxial cable 600.

[0105] Please refer to Figure 6 and Figure 7 In one embodiment, an annular flange 510 is provided on the outer periphery of the metal connector 500, and the annular flange 510 abuts against the side of the metal bottom plate 200 close to the radiator 100. The metal connector 500 is disposed in the mounting hole 203, and the annular flange 510 abuts against the side of the metal bottom plate 200 close to the radiator 100, so that the metal connector 500 can be positioned to prevent the metal connector 500 from being separated from the mounting hole 203 in a direction away from the radiator 100.

[0106] At the same time, electrical connection can be achieved through the contact between the annular flange 510 and the metal bottom plate 200, thereby achieving electrical connection between the metal connector 500 and the metal bottom plate 200. The annular flange 510 and the metal connector 500 can be an integral structure.

[0107] Please refer to Figure 7 In one embodiment, the mounting hole 203 is a non-circular hole, and the contour shape and size of the metal connector 500 are adapted to the mounting hole 203. The outer contour shape of the metal connector 500 is also non-circular, so that when the metal connector 500 is installed in the mounting hole 203, the metal connector 500 can be prevented from rotating relative to the mounting hole 203, thereby achieving reliable installation of the metal connector 500.

[0108] Figure 7 The mounting hole 203 shown is in an oval shape. The mounting hole 203 may also be in other non-circular shapes.

[0109] Please refer to Figure 5 and Figure 6 In one embodiment, the omnidirectional ceiling antenna further includes a mounting screw sleeve 800, an outer circumference of the metal connector 500 is provided with an outer thread, the inner thread of the mounting screw sleeve 800 cooperates with the outer thread of the metal connector 500, and the mounting screw sleeve 800 abuts against the side of the metal bottom plate 200 facing away from the radiator 100. In this way, the metal connector 500 can be prevented from moving out of the mounting hole 203 in a direction close to the radiator 100, thereby achieving reliable installation of the metal connector 500.

[0110] The mounting screw sleeve 800 is insulated by using non-metallic materials, such as plastic, so as to prevent a short circuit between the metal connector 500 and the metal base plate 200.

[0111] Furthermore, the mounting screw sleeve 800 abuts against the side of the metal base plate 200 facing away from the radiator 100, and the annular flange 510 abuts against the side of the metal base plate 200 close to the radiator 100, so that the metal base plate 200 can be clamped between the mounting screw sleeve 800 and the annular flange 510, thereby achieving reliable installation of the metal connecting member 500.

[0112] Optionally, refer to Figure 5 The mounting screw sleeve 800 has an external thread, and the internal thread of the mounting nut 810 can be matched with the external thread of the mounting screw sleeve 800 to fix the mounting screw sleeve 800 to the ceiling, thereby fixing the omnidirectional ceiling antenna to the ceiling.

[0113] Please refer to Figure 1 and Figure 6 In one embodiment, the omnidirectional ceiling antenna further includes an insulating member 700, which is disposed between the radiator 100 and the metal connector 500 to prevent a short circuit therebetween.

[0114] Specifically, the radiator 100 and the metal connector 500 are respectively in contact with two sides of the insulating member 700. The inner conductor 640 passes through the insulating member 700 and is electrically connected to the radiator 100.

[0115] Please refer to Figure 6 In one embodiment, the coaxial cable 600 includes a cable body 600a, a first cable segment 600b, a second cable segment 600c, and a third cable segment 600d which are connected in sequence.

[0116] The cable body 600a includes an inner conductor 640, an insulating medium 630, an outer conductor 620 and an insulating shell 610 which are sequentially arranged from the inside to the outside.

[0117] The insulating shell 610 of the first cable segment 600b is stripped, and the outer conductor 620 is exposed. The first cable segment 600b is located on the side of the metal connector 500 facing away from the radiator 100, and the outer conductor 620 of the first cable segment 600b is electrically connected to the metal connector 500. Specifically, the outer conductor 620 of the first cable segment 600b can be welded to an end of the metal connector 500 facing away from the radiator 100.

[0118] The second cable segment 600c is stripped of the insulating shell 610 and the outer conductor 620, and the insulating medium 630 is exposed, and the second cable segment 600c is inserted into the wire through hole 501. In this way, the second cable segment 600c can be insulated from the hole wall of the wire through hole 501, that is, insulated from the metal connector 500, by the exposed insulating medium 630.

[0119] The third cable segment 600 d is stripped of the insulating shell 610 , the outer conductor 620 and the insulating medium 630 , and the inner conductor 640 is exposed. The inner conductor 640 of the third cable segment 600 d extends through the wire through hole 501 and is electrically connected to the radiator 100 .

[0120] In this embodiment, by dividing the coaxial cable 600 into the above-mentioned multi-segment structure, the stripping conditions of the first cable segment 600b, the second cable segment 600c and the third cable segment 600d are different, so as to realize different functions respectively, thereby realizing that the inner conductor 640 of the coaxial cable 600 is electrically connected to the radiator 100, and the outer conductor 620 of the coaxial cable 600 is electrically connected to the metal base plate 200.

[0121] In other embodiments, the coaxial cable may also be electrically connected to the inner conductor and the radiator, and the outer conductor and the metal base plate, by other means.

[0122] Please refer to Figure 4 8(a), in one embodiment, the radiator 100 includes a first portion 110 and a second portion 120 connected and coaxially arranged, and the first portion 110 is located on a side of the second portion 120 close to the metal base plate 200. Along the direction of the radiator 100 close to the metal base plate 200, the outer diameter of the first portion 110 gradually decreases, and the outer diameter of the second portion 120 is uniform. That is, the shape of the second portion 120 is cylindrical. The generatrix of the first portion 110 is a straight line segment.

[0123] Referring to FIG. 8( b ), the structure of a radiator 100 according to another embodiment is substantially the same as that of the radiator 100 shown in FIG. 8( a ), except that the generatrix of the first portion 110 is an arc.

[0124] Referring to FIG. 8( c ), the structure of the radiator 100 of another embodiment is substantially the same as that of the radiator 100 shown in FIG. 8( a ), except that the outer diameter of the second portion 120 gradually increases along the direction in which the radiator 100 approaches the metal base plate 200 .

[0125] Referring to FIG. 8( d ), the structure of a radiator 100 in another embodiment is substantially the same as that of the radiator 100 shown in FIG. 8( c ), except that the generatrix of the first portion 110 is an arc.

[0126] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0127] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An omnidirectional ceiling antenna, characterized in that: The omnidirectional ceiling antenna comprises: Metal base plate; A radiator, located on one side of the metal base plate along the thickness direction; a non-metallic support structure, one end of which is connected to the radiator, and the other end of which is connected to the metal base plate, for supporting the radiator on the metal base plate; and A metal grounding piece, one end of which is electrically connected to the radiator, and the other end of which is electrically connected to the metal bottom plate.

2. The omnidirectional ceiling antenna according to claim 1, characterized in that: The non-metallic support structure comprises: an annular support portion, the annular support portion being sleeved on the radiator; and A plurality of first connection parts are arranged at intervals along the circumference of the annular support part, one end of the first connection part is fixedly connected to the annular support part, and the other end is connected to the metal bottom plate.

3. The omnidirectional ceiling antenna according to claim 2, characterized in that: The non-metallic support structure further includes a plurality of second connection parts, which are arranged at intervals along the circumference of the annular support part, one end of the second connection part is fixedly connected to the annular support part, and the other end is connected to the radiator.

4. The omnidirectional ceiling antenna according to claim 3, characterized in that: Along the circumference of the annular support portion, the first connection portions and the second connection portions are alternately arranged in sequence.

5. The omnidirectional ceiling antenna according to claim 3, characterized in that: A second clamping protrusion is disposed at one end of the second connecting portion, and a second clamping hole corresponding to the second clamping protrusion is disposed on the radiator, and the second clamping protrusion is clamped and matched with the second clamping hole.

6. The omnidirectional ceiling antenna according to claim 2, characterized in that: A first latching protrusion is disposed at one end of the first connecting portion, and a first latching hole corresponding to the first latching protrusion is disposed on the metal bottom plate, and the first latching protrusion is engaged with the first latching hole.

7. The omnidirectional ceiling antenna according to claim 6, characterized in that: The first clamping protrusion includes a first clamping segment and a second clamping segment connected to each other, the first clamping segment is located on a side of the second clamping segment close to the metal bottom plate, and the width of the first clamping segment is greater than the width of the second clamping segment; The first clamping hole includes a first hole segment and a second hole segment that are connected. The first hole segment is located on one side of the second hole segment close to the center of the metal base plate. The width of the first hole segment is greater than the width of the second hole segment, so that the first clamping segment can pass through the first hole segment, and the second hole segment can prevent the first clamping segment and the first connecting portion from passing through; the second clamping segment can be inserted into the second hole segment.

8. The omnidirectional ceiling antenna according to claim 1, characterized in that: The metal base plate is provided with a plurality of first connection holes, and the radiator is provided with a plurality of second connection holes; one end of the plurality of metal grounding members is connected to the plurality of first connection holes one by one, and the other end of the plurality of metal grounding members is connected to the plurality of second connection holes one by one.

9. The omnidirectional ceiling antenna according to claim 1, characterized in that: It also includes metal connectors and coaxial cables; The center of the metal bottom plate is provided with a mounting hole, the metal connector is installed in the mounting hole and is electrically connected to the metal bottom plate, and the metal connector is provided with a wire through hole; The coaxial cable is located on a side of the metal base plate facing away from the radiator; one end of the coaxial cable is passed through the wire through hole, the inner conductor of the coaxial cable is electrically connected to the radiator through the wire through hole, and the outer conductor of the coaxial cable is electrically connected to the metal connector.

10. The omnidirectional ceiling antenna according to claim 9, characterized in that: An annular flange is arranged on the outer periphery of the metal connecting piece, and the annular flange abuts against a side of the metal bottom plate close to the radiator.

11. The omnidirectional ceiling antenna according to claim 10, characterized in that: It also includes a mounting screw sleeve, the outer periphery of the metal connector is provided with an external thread, the internal thread of the mounting screw sleeve cooperates with the external thread of the metal connector, and the mounting screw sleeve abuts against the side of the metal bottom plate facing away from the radiator.

12. The omnidirectional ceiling antenna according to claim 9, characterized in that: The coaxial cable comprises a cable body, a first cable segment, a second cable segment and a third cable segment connected in sequence; The insulating shell of the first cable segment is stripped off, and the outer conductor is exposed, the first cable segment is located on a side of the metal connector facing away from the radiator, and the outer conductor of the first cable segment is electrically connected to the metal connector; The insulating shell and the outer conductor of the second cable segment are stripped off, and the insulating medium is exposed, and the second cable segment is inserted into the cable through hole; The insulating shell, the outer conductor and the insulating medium of the third cable segment are stripped, and the inner conductor is exposed. The inner conductor of the third cable segment extends out of the wire through hole and is electrically connected to the radiator.

13. The omnidirectional ceiling antenna according to claim 1, characterized in that: The metal bottom plate is a circular bottom plate, the radiator is a rotating body, and the metal bottom plate and the radiator are coaxially arranged.

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