Omnidirectional ceiling antenna

Abstract

The utility model provides an omnidirectional ceiling antenna which comprises an upper cone, a reflecting plate, a coaxial cable assembly and short-circuit strips, the reflecting plate is circular, the coaxial cable assembly is inserted in the central point of the reflecting plate and the central axis of the upper cone and is fixed through a connector, the short-circuit strips are uniformly distributed on the reflecting plate, and the coaxial cable assembly is fixed through a connector. The radians of the adjacent short-circuiting strips are the same, one end of each short-circuiting strip is attached to the upper cone, the other end of each short-circuiting strip is attached to the reflecting plate, and adjusting pieces with the same number as the short-circuiting strips are uniformly distributed in the middle of a gap formed by the short-circuiting strips on the reflecting plate; according to the omni-directional ceiling antenna, the adjusting sheets are uniformly arranged on the reflecting plate, so that the condition of non-uniform distribution of mobile signals can be weakened, and the out-of-roundness of the omni-directional ceiling antenna is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and particularly relates to an omnidirectional ceiling antenna. Background Art

[0002] The omnidirectional ceiling antenna is a type of antenna in a mobile communication system, mainly used for indoor signal coverage. Since panel antennas are used for outdoor signal coverage, they have high power, strong signals, and long coverage distances. However, relatively speaking, in indoor areas such as conference halls, hotels, office buildings, cinemas, residential buildings, etc., omnidirectional ceiling antennas can be used to enhance the coverage of mobile signals.

[0003] Since the radiation signal of the omnidirectional ceiling antenna is not absolutely centrosymmetric at a specific frequency, and the shorting bars symmetrically distributed on the reflector of the omnidirectional ceiling antenna will affect the signal at a specific frequency, and the manufacturing deviation of the omnidirectional ceiling antenna causes the signal at a specific frequency to have a problem of non-compliance with the non-circularity after being radiated outward through the omnidirectional ceiling antenna. Here, the non-circularity refers to the uneven distribution of the antenna transmission power. Therefore, reducing the non-circularity of the omnidirectional ceiling antenna is a problem that needs to be solved currently. Summary of the Utility Model

[0004] The utility model provides an omnidirectional ceiling antenna, aiming to improve the non-circularity of the omnidirectional ceiling antenna and make the mobile communication signal distribution more uniform.

[0005] The utility model proposes an omnidirectional ceiling antenna, including: an upper cone, a reflector, a coaxial cable assembly, and shorting bars. The reflector is circular. The coaxial cable assembly is inserted at the center point of the reflector and the central axis of the upper cone and fixed by a connector. The shorting bars are evenly distributed on the reflector, and the adjacent shorting bars are separated by the same radian. One end of each shorting bar is attached to the upper cone, and one end is attached to the reflector. Among them, adjustment pieces with the same number as the shorting bars are evenly distributed at the middle positions of the gaps formed by the shorting bars on the reflector.

[0006] In one embodiment, the omnidirectional ceiling antenna includes 3 shorting bars, which are evenly distributed on the reflector, and the adjacent shorting bars are separated by 120 degrees. 3 adjustment pieces are evenly distributed at the middle positions of the 3 gaps formed by the shorting bars on the reflector.

[0007] In one embodiment, the adjustment piece is an M-shaped aluminum sheet.

[0008] In one embodiment, the adjustment piece is a T-shaped aluminum sheet.

[0009] In one embodiment, the adjustment piece is a door-shaped aluminum sheet.

[0010] In one embodiment, a fixing surface is provided at the lower end of the adjusting piece for attaching the adjusting piece to the reflector; the upper end of the adjusting piece is bent with respect to its lower end, and the shape of the upper end is M-shaped, T-shaped or gate-shaped.

[0011] In one embodiment, the upper cone, the reflector and the shorting bars are made of aluminum.

[0012] In one embodiment, the coaxial cable assembly has a model number of RFG58; the adjusting piece is formed by stamping or cutting a sheet.

[0013] In one embodiment, the connector is made of aluminum.

[0014] In one embodiment, the uniformly distributed shorting bars are rotationally symmetric with respect to the coaxial cable assembly, and the uniformly distributed adjusting pieces are rotationally symmetric with respect to the coaxial cable assembly.

[0015] An omnidirectional ceiling-mounted antenna of the present invention includes an upper cone, a reflector, a coaxial cable assembly and shorting bars. The reflector is circular. The coaxial cable assembly is inserted at the center point of the reflector and the central axis of the upper cone and is fixed by a connector. The shorting bars are uniformly distributed on the reflector, and the arcs between adjacent shorting bars are the same. One end of each shorting bar is attached to the upper cone and the other end is attached to the reflector. Among them, adjusting pieces with the same number as the shorting bars are also uniformly distributed at the middle positions of the gaps formed by the shorting bars on the reflector; by uniformly arranging the adjusting pieces on the reflector, this omnidirectional ceiling-mounted antenna can weaken the uneven distribution of mobile signals and improve the non-circularity of the ceiling-mounted antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following briefly introduces the drawings required to be used in the embodiments. The drawings in the following description are only the corresponding drawings of some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of an omnidirectional ceiling-mounted antenna in one embodiment of the present invention;

[0018] Figure 2 It is a schematic structural diagram of an omnidirectional ceiling-mounted antenna in one embodiment of the present invention;

[0019] Figure 3 It is a schematic structural diagram of an omnidirectional ceiling-mounted antenna in one embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs.

[0022] See Figure 1 , in one embodiment of an omnidirectional ceiling antenna of the present utility model, it includes an upper cone 1, a reflector 2, a coaxial cable assembly 3, and a shorting bar 4. The reflector 2 is circular. The coaxial cable assembly 3 is inserted at the center point of the reflector 2 and the central axis of the upper cone 1 and is fixed by a connector 5. The shorting bars 4 are evenly distributed on the reflector 2, and the arcs between adjacent shorting bars 4 are the same. One end of each shorting bar 4 is attached to the upper cone 1 and the other end is attached to the reflector 2. Among them, adjustment pieces 6 having the same number as the shorting bars are also evenly distributed at the middle positions of the gaps formed by the shorting bars on the reflector 2.

[0023] The frequency range of the mobile communication signals radiated by the omnidirectional ceiling antenna is: 700Mhz to 2700Mhz. All the signals of all frequencies in this frequency band are not centrosymmetric, so there is a problem of non-circularity. At the same time, since the shorting bars 4 are symmetrically distributed on the reflector 2 of the ceiling antenna, it will have a relatively large impact on the signals of specific frequencies, further causing the non-circularity of the mobile communication signals of specific frequencies to be strengthened. The omnidirectional ceiling antenna of this embodiment can weaken the influence of the shorting bars 4 on the non-circularity of specific frequency signals by evenly distributing the adjustment pieces 6 at the middle positions of the gaps formed by the shorting bars 4 on the reflector 2.

[0024] In one embodiment, the omnidirectional ceiling antenna includes 3 shorting bars 4, and the 3 shorting bars are evenly distributed on the reflector 2. The adjacent shorting bars 4 are separated by 120 degrees. Three adjustment pieces 6 are also evenly distributed at the middle positions of the 3 gaps formed by the shorting bars 4 on the reflector 2.

[0025] Since the arc between the adjustment piece 6 and the shorting bar 4 becomes smaller, the influence of the shorting bar 4 on the non-circularity of specific frequency signals can be weakened. Among them, the larger the size of the adjustment piece 6, the lower the frequency affected. The user can set the size of the adjustment piece 6 according to the frequency band requirements.

[0026] Specifically, the short - circuit strips 4 that are evenly distributed are rotationally symmetric with respect to the coaxial cable assembly 3, and the adjusting pieces 6 that are evenly distributed are rotationally symmetric with respect to the coaxial cable assembly 3.

[0027] The adjusting piece 6 is arranged to be rotationally symmetric with respect to the coaxial cable assembly, which can further weaken the non - circularity problem of the omnidirectional ceiling antenna caused by manufacturing deviations.

[0028] In one embodiment, the adjusting piece is a U - shaped aluminum sheet 6. The lower end of the adjusting piece is a connecting end, which has a fixing surface that fits with the reflector 2. The upper end of the adjusting piece forms a bend with its lower end, and the shape of the upper end of the adjusting piece is U - shaped. The adjusting piece is formed by stamping or cutting a sheet material.

[0029] See Figure 2 In one embodiment, the adjusting piece is a T - shaped aluminum sheet 7. The lower end of the adjusting piece is a connecting end, which has a fixing surface that fits with the reflector 2. The upper end of the adjusting piece forms a bend with its lower end, and the shape of the upper end of the adjusting piece is T - shaped. The adjusting piece is formed by stamping or cutting a sheet material.

[0030] See Figure 3 In one embodiment, the adjusting piece is an M - shaped aluminum sheet 8. The lower end of the adjusting piece is a connecting end, which has a fixing surface that fits with the reflector 2. The upper end of the adjusting piece forms a bend with its lower end, and the shape of the upper end of the adjusting piece is M - shaped. The adjusting piece is formed by stamping or cutting a sheet material.

[0031] The shapes of these three adjusting pieces are preferred shapes, and the method of this embodiment is not limited to these three structural shapes.

[0032] In one embodiment, a fixing surface is provided at the lower end of the adjusting piece for attaching the adjusting piece to the reflector 2.

[0033] In one embodiment, the upper cone 1 and the reflector 2 are aluminum parts.

[0034] In one embodiment, the model of the coaxial cable assembly 3 is RFG58.

[0035] In one embodiment, the short - circuit strip 4 is an aluminum part.

[0036] In one embodiment, the connector 5 is an aluminum part.

[0037] The material of the adjusting piece is the same as that of the omnidirectional ceiling antenna body, so as to realize the intervention of specific - frequency signals and the improvement of non - circularity.

[0038] For the omnidirectional ceiling antenna according to the embodiment of the present application, by uniformly arranging adjusting pieces at the middle position of the gap formed by the shorting bars on the reflector, the problem of non-circularity caused by the shorting bars can be improved. The shape of the adjusting pieces can be gate-shaped, T-shaped, and M-shaped. The size of the adjusting pieces can be set according to the specific frequency signal to be improved. The larger the size of the adjusting pieces, the lower the affected frequency. This solution can effectively improve the non-circularity problem of the omnidirectional ceiling antenna, with a simple structure and strong practicability.

[0039] In summary, although the present utility model has been disclosed above with preferred embodiments, the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the concept of the technical solution of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

[0040] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

Claims

1. An omnidirectional ceiling antenna, characterized in that: include: An upper vertebral body, a reflecting plate, a coaxial cable assembly and a short-circuit bar, wherein the reflecting plate is circular, the coaxial cable assembly is plugged into the center point of the reflecting plate and the center axis of the upper vertebral body, and is fixed by a connector, the short-circuit bars are evenly distributed on the reflecting plate, the arcs between adjacent short-circuit bars are the same, one end of each short-circuit bar is attached to the upper vertebral body, and the other end is attached to the reflecting plate, wherein adjustment plates consistent with the number of short-circuit bars are evenly distributed in the middle of the gap formed by the short-circuit bars on the reflecting plate.

2. The omnidirectional ceiling antenna according to claim 1, characterized in that: The omnidirectional ceiling antenna includes three short-circuit bars, which are evenly distributed on the reflector. Adjacent short-circuit bars are 120 degrees apart. Three adjustment plates are evenly distributed in the middle of three gaps formed by the short-circuit bars on the reflector.

3. The omnidirectional ceiling antenna according to claim 1, characterized in that: The adjusting sheet is an M-shaped aluminum sheet.

4. The omnidirectional ceiling antenna according to claim 1, characterized in that: The adjusting piece is a T-shaped aluminum piece.

5. The omnidirectional ceiling antenna according to claim 1, characterized in that: The regulating sheet is a door-shaped aluminum sheet.

6. The omnidirectional ceiling antenna according to claim 1, characterized in that: The lower end of the adjusting piece is provided with a fixing surface for attaching the adjusting piece to the reflecting plate; the upper end of the adjusting piece is bent with its lower end, and the shape of the upper end is M-shaped, T-shaped or gate-shaped.

7. The omnidirectional ceiling antenna according to claim 1, characterized in that: The upper cone, the reflective plate and the short-circuit bar are made of aluminum.

8. The omnidirectional ceiling antenna according to claim 1, characterized in that: The model of the coaxial cable assembly is RFG58; the adjustment sheet is formed by punching or cutting a sheet.

9. The omnidirectional ceiling antenna according to claim 1, characterized in that: The connecting head is an aluminum part.

10. The omnidirectional ceiling antenna according to claim 1, characterized in that: The evenly distributed short-circuit bars are rotationally symmetrical with respect to the coaxial cable assembly, and the evenly distributed adjustment sheets are rotationally symmetrical with respect to the coaxial cable assembly.

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