Omnidirectional ceiling antenna and electronic equipment

Abstract

The utility model provides an omnidirectional ceiling antenna and electronic equipment, and belongs to the technical field of communication. The omnidirectional ceiling antenna comprises a radiation structure, a reflection structure and a covering layer, the reflection structure is provided with a first surface and a second surface which are oppositely arranged along the thickness direction; the radiation structure comprises a first radiation part and a second radiation part, the first radiation part is a hollow cone, and the second radiation part comprises N annular bodies; the hollow cone is provided with a first opening, and each annular body comprises a second opening and a third opening which are oppositely arranged; the second opening of the first annular body is connected with the first opening, and the third opening of the ith annular body is connected with the second opening of the (i + 1) th annular body; the outer contour of the orthographic projection of the ith annular body on the plane where the first surface is located is located in the outer contour of the orthographic projection of the (i + 1) th annular body on the plane where the first surface is located; the covering layer is arranged on the first surface, surrounds the peripheries of the first radiation part and the second radiation part, and covers the outer walls of the first radiation part and the second radiation part.

Description

Technical Field

[0001] The present invention belongs to the field of communication technology, and in particular relates to an omnidirectional ceiling antenna and electronic equipment. Background Art

[0002] In the existing indoor distribution system, in order to achieve high-speed and high-reliability wireless communication, the fifth generation mobile communication technology (5G) is increasingly widely used. However, in the distribution system of 5G signals, due to the large amount of user data, the antenna has higher and higher requirements such as high gain, wide beam, and omnidirectional coverage. Therefore, providing an indoor distribution system with high gain, wide beam, and omnidirectional coverage is a technical problem that needs to be solved urgently. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art and provides an omnidirectional ceiling antenna and electronic equipment.

[0004] The embodiment of the present disclosure provides an omnidirectional ceiling antenna, which includes: a radiation structure, a reflection structure and a covering layer; wherein:

[0005] The reflective structure has a first surface and a second surface arranged opposite to each other along a thickness direction thereof;

[0006] The radiation structure comprises a first radiation part and a second radiation part, wherein the first radiation part is a hollow cone, and the second radiation part comprises N ring-shaped bodies; the cone tip of the hollow cone is opposite to the first surface; wherein,

[0007] The hollow cone has a first opening, and each of the annular bodies includes a second opening and a third opening that are arranged opposite to each other, and the second opening is closer to the first opening than the third opening; the second opening of the first annular body is connected to the first opening, and the third opening of the i-th annular body is connected to the second opening of the i+1-th annular body; the outer contour of the orthographic projection of the i-th annular body on the plane where the first surface is located is located within the outer contour of the orthographic projection of the i+1-th annular body on the plane where the first surface is located; N is an integer greater than or equal to 2, and i is 1 to (N-1);

[0008] The covering layer is disposed on the first surface, surrounds the periphery of the first radiation portion and the second radiation portion, and covers the outer walls of the first radiation portion and the second radiation portion.

[0009] Wherein, the omnidirectional ceiling antenna further comprises at least one circle of coupling electrodes arranged on the outer wall of the covering layer, and the coupling electrodes are spaced a certain distance from the reflecting structure;

[0010] The orthographic projection of the radiation structure on the plane where the first surface is located is located within the orthographic projection of any one of the coupling electrodes on the plane where the first surface is located.

[0011] Among them, the height of the radiation structure is H1, and the distance between the coupling electrode closest to the first surface among the at least one circle of coupling electrodes and the first surface is L1; the distance between the coupling electrode farthest from the first surface among the at least one circle of coupling electrodes and the plane where the third opening of the Nth annular body is located is L2, L1:H1 is (0.5*H2) / H1~(H1-0.5*b) / H1, and L2:H1 is (0.5*H2) / H1~(H1-0.5*b) / H1; H2 is the height of the hollow cone, and b is the width of the coupling electrode.

[0012] There are multiple coupling electrodes, the spacing between adjacent coupling electrodes is a, the width of the coupling electrodes is b, and a:b is 1:2 to 2:1.

[0013] Wherein, the radiation structure further includes a parasitic radiation portion arranged on the third opening of the Nth annular body.

[0014] The second surface is smaller than the first surface in area, and the orthographic projection of the first surface on the plane where the second surface is located covers the second surface.

[0015] The center of the orthographic projection of the first surface on the plane where the second surface is located coincides with the center of the second surface.

[0016] Wherein, the reflective structure is a frustum or a prism.

[0017] The center of the orthographic projection of each annular body on the plane where the second surface is located and the orthographic projection of the cone tip of the hollow cone on the plane where the second surface is located both coincide with the center of the second surface.

[0018] The center of the orthographic projection of the covering layer on the plane where the second surface is located coincides with the center of the orthographic projection of each annular body on the plane where the second surface is located and the orthographic projection of the cone tip of the hollow cone on the plane where the second surface is located.

[0019] The material of the cover layer includes any one of FR4, Arlon AD430A, and Arlon AD450A.

[0020] Wherein, the annular body is a hollow cylinder.

[0021] The omnidirectional ceiling antenna further includes a feeding structure, and the feeding structure is connected to the radiation structure through a via hole penetrating the reflection structure.

[0022] The feeding structure is a probe, the probe passes through the center of the reflective structure, and the cone tip of the hollow cone is connected to the radiation structure.

[0023] Wherein, the first radiation part and the second radiation part are an integrally formed structure.

[0024] An embodiment of the present disclosure provides an electronic device, which includes any of the above-mentioned omnidirectional ceiling antennas. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1a Schematic diagram of an omnidirectional ceiling antenna according to an embodiment of the present disclosure.

[0026] Figure 1b It is a side view of the omnidirectional ceiling antenna according to an embodiment of the present disclosure.

[0027] Figure 2 The S11 parameter simulation result of the antenna of the first example.

[0028] Figure 3a This is the simulation result of the vertical radiation pattern of the antenna of the first example.

[0029] Figure 3b This is the simulation result of the horizontal radiation pattern of the antenna of the first example.

[0030] Figure 4 Schematic diagram of the omnidirectional ceiling antenna in the second example.

[0031] Figure 5 The S11 parameter simulation result of the antenna of the second example.

[0032] Figure 6a This is the simulation result of the vertical radiation pattern of the antenna of the second example.

[0033] Figure 6b This is the simulation result of the horizontal radiation pattern of the antenna of the second example.

[0034] Figure 7 The diagram is a schematic diagram of an omnidirectional ceiling antenna of the third example.

[0035] Figure 8 for Figure 7 The S11 parameter simulation results of the antenna are shown.

[0036] Figure 9a Shown Figure 7 The simulation results of the vertical radiation pattern of the antenna are shown.

[0037] Figure 9b Shown Figure 7 The simulation results of the horizontal radiation pattern of the antenna are shown.

[0038] Fig.10 Schematic diagram of another omnidirectional ceiling antenna in the third example.

[0039] Fig.11 for Fig.10 The S11 parameter simulation results of the antenna are shown.

[0040] Fig.12a for Fig.10 The simulation results of the vertical radiation pattern of the antenna are shown.

[0041] Figure 12b for Fig.10 The simulation results of the horizontal radiation pattern of the antenna are shown.

[0042] Fig.13 Schematic diagram of a fourth example of an omnidirectional ceiling antenna.

[0043] Fig.14 The S11 parameter simulation result of the antenna of the fourth example.

[0044] Fig.15a This is the simulation result of the vertical radiation pattern of the antenna of the fourth example.

[0045] Fig.15b This is the simulation result of the horizontal radiation pattern of the antenna of the fourth example.

[0046] Fig.16 Schematic diagram of the fifth example of an omnidirectional ceiling antenna.

[0047] Fig.17 The S11 parameter simulation result of the antenna of the fifth example.

[0048] Fig.18a This is the simulation result of the vertical radiation pattern of the antenna of the fifth example.

[0049] Fig.18b This is the simulation result of the horizontal radiation pattern of the antenna of the fifth example.

[0050] Fig.19 The S11 parameter simulation results of the antenna when the material of the covering layer is Arlon AD430A.

[0051] Fig.20a When Arlon AD430A is used as the material for the cover layer, the vertical radiation pattern simulation result of the antenna is shown.

[0052] Fig.20b When Arlon AD430A is used as the material for the cover layer, the horizontal radiation pattern simulation result of the antenna is shown.

[0053] Fig.21 The S11 parameter simulation results of the antenna when Arlon AD450A is used as the material for the cover layer.

[0054] Fig.22a When Arlon AD450A is used as the material for the cover layer, the vertical radiation pattern simulation result of the antenna is shown.

[0055] Figure 22b When Arlon AD450A is used as the material for the cover layer, the horizontal radiation pattern simulation result of the antenna is shown.

[0056] Fig.23 Schematic diagram of a second example of an omnidirectional ceiling antenna.

[0057] Fig.24 The S11 parameter simulation result of the antenna of the seventh example.

[0058] Fig.25a This is the simulation result of the vertical radiation pattern of the antenna of the seventh example.

[0059] Fig.25b This is the simulation result of the horizontal radiation pattern of the antenna of the seventh example. DETAILED DESCRIPTION

[0060] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0061] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0062] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, the words "include" or "comprise" and the like mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0063] As used herein, "parallel" and "perpendicular" include the described situation and the situation similar to the described situation, and the range of the similar situation is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the error associated with the measurement of a specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°.

[0064] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0065] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0066] Figure 1a is a schematic diagram of an omnidirectional ceiling antenna according to an embodiment of the present disclosure; Figure 1b is a side view of the omnidirectional ceiling antenna of the embodiment of the present disclosure; Figure 1a and 1bAs shown, an embodiment of the present disclosure provides an omnidirectional ceiling antenna, which includes a radiation structure 1, a reflection structure 2 and a covering layer 3. The reflection structure 2 includes a first surface and a second surface arranged opposite to each other along its thickness direction. The radiation structure 1 is mainly composed of two parts, which are respectively referred to as a first radiation part 11 and a second radiation part 12 along the first surface direction away from the reflection structure 2. The covering layer 3 is arranged on the first surface of the reflection structure 2, surrounds the periphery of the first radiation part 11 and the second radiation part 12, and covers the outer walls of the first radiation part 11 and the second radiation part 12. The arrangement of the covering layer 3 helps to achieve a low profile.

[0067] Reference Figure 1a and 1b , the radiation structure 1 in the embodiment of the present disclosure is a hollow structure, wherein the first radiation part 11 is a hollow cone, and the cone tip points to the first surface of the reflective structure 2; the second radiation part 12 is composed of N annular bodies 121 connected in sequence. Specifically, the hollow cone has a first opening, and each annular body 121 includes a second opening and a third opening that are relatively arranged, and the second opening is closer to the first opening than the third opening. The second opening of the first annular body 121 is connected to the first opening, and the third opening of the i-th annular body 121 is connected to the second opening of the i+1-th annular body 121; the outer contour of the orthographic projection of the i-th annular body 121 on the plane where the first surface is located is located within the outer contour of the orthographic projection of the i+1-th annular body 121 on the plane where the first surface is located; N is an integer greater than or equal to 2, and i is 1 to (N-1). In this case, for any two adjacent annular bodies 121, a step structure is formed at the connection position between the two. For example, the second radiating portion 12 includes two annular bodies 121 to form a step; the second radiating portion 12 includes three annular bodies 121 to form a two-step step. In the embodiment of the present disclosure, this arrangement can achieve a lower profile while ensuring that the antenna has a wider bandwidth.

[0068] In some examples, the outline of the hollow cone in the embodiment of the present disclosure may be a cone, and the outline of the annular body 121 may be a cylinder, that is, the first opening of the hollow cone, the second opening and the third opening of the annular body 121 are all circular. The outer contour surface of the first radiating portion 11 and the second radiating portion 12 of this structure is smooth, which can reduce electromagnetic wave loss and improve radiation efficiency. Furthermore, when the first opening of the hollow cone, the second opening and the third opening of the annular body 121 are all circular, the centers of the three coincide. Of course, the outline of the hollow cone may be a pyramid, and the outline of the annular body 121 may be a prism; that is, the first opening of the hollow cone, the second opening and the third opening of the annular body 121 may also be polygonal. When the outline of the hollow cone can be a pyramid and the outline of the annular body 121 can be a prism, in order to reduce electromagnetic wave loss, preferably, the outline of the hollow cone can be a hexagonal pyramid, an octagonal pyramid, etc., and the outline of the annular body 121 can be a hexagonal prism, an octagonal prism, etc., that is, the first opening of the hollow cone, the second opening and the third opening of the annular body 121 can also be hexagonal, octagonal, etc. It should be noted that when the first opening of the hollow cone, the second opening and the third opening of the annular body 121 are polygonal, it is preferred that each internal angle of the polygon is an obtuse angle. In the various drawings of the embodiments of the present disclosure, it is taken as an example that the outline of the hollow cone in the embodiments of the present disclosure can be a cone and the outline of the annular body 121 can be a cylinder, but it should be understood that this does not constitute a limitation on the protection scope of the embodiments of the present disclosure.

[0069] In some examples, the material of the cover layer 3 in the embodiment of the present disclosure can be FR4, which has a dielectric constant of 4.4 and a loss tangent of 0.02. By selecting a suitable material, the antenna profile can be further reduced. It should be noted that the area of ​​the cover layer 3 needs to be large enough to cover the outside of the first radiating portion 11 and the second radiating portion 12, but there is no cover layer 3 filling the inner cavity of the first radiating portion 11 and the second radiating portion 12.

[0070] Furthermore, the outer contour of the cover layer 3 may be cylindrical, and of course, the outer contour of the cover layer 3 may be prismatic. In the embodiment of the present disclosure, the outer contour of the cover layer 3 may be cylindrical as an example. When the outer contour of the cover layer 3 may be cylindrical, the first radiation structure 1 is a hollow cone, and the annular body 121 of the second radiation portion 12 is a hollow cylinder, the first opening, the second opening, the third opening, and the outer contour of the cover layer 3 coincide at the center of the orthographic projection of the plane where the first surface of the reflective structure 2 is located. In this way, it is helpful to achieve miniaturization of the antenna volume.

[0071] In some examples, the omnidirectional ceiling antenna of the embodiment of the present disclosure includes not only the above-mentioned structure, but also includes at least one circle of coupling electrodes 4 arranged on the outer wall of the covering layer 3, and there is a certain distance between the coupling electrode 4 and the reflecting structure 2, and the two are not in contact. The orthographic projection of the radiation structure 1 on the plane where the first surface is located is located within the orthographic projection of any coupling electrode 4 on the plane where the first surface is located. In the embodiment of the present disclosure, by setting the annular coupling electrode 4 on the outer wall of the covering layer 3, the impedance matching of the antenna is improved to a certain extent, thereby improving the antenna performance. Furthermore, the coupling electrode 4 can be made of conductive materials such as metal.

[0072] In some examples, the position of the coupling electrode 4 relative to the radiation structure 1 has a certain influence on improving the radiation performance of the antenna. For example, if the distance from the coupling electrode 4 to the cone tip of the first radiation portion 11 is too small, the operating frequency band of the antenna may be discontinuous. If the distance from the coupling electrode 4 to the third opening of the annular body 121 (the Nth annular body 121) farthest from the first radiation portion 11 is too small, the operating frequency band of the antenna may be too high. Therefore, a reasonable position of the coupling electrode 4 relative to the radiation structure 1 is required. In the embodiment of the present disclosure, if the height of the radiation structure 1 is H1, the distance between the coupling electrode 4 closest to the first surface in at least one circle of coupling electrodes 4 and the first surface is L1; the distance between the coupling electrode 4 farthest from the first surface in at least one circle of coupling electrodes 4 and the plane where the third opening of the Nth annular body 121 is located is L2, at this time, L1:H1 is (0.5*H2) / H1~(H1-0.5*b) / H1; L2:H1 is (0.5*H2) / H1~(H1-0.5*b) / H1; H2 is the height of the hollow cone, and b is the width of the coupling electrode 4.

[0073] In some examples, the number of coupling electrodes 4 in the embodiment of the present disclosure may be one, two, or even more. Reasonable setting of the number of coupling electrodes 4 can play a role in expanding the antenna bandwidth to a certain extent.

[0074] In some examples, there are multiple coupling electrodes 4 , the spacing between adjacent coupling electrodes 4 is a, the width of the coupling electrodes 4 is b, and a:b is 1:2 to 2:1.

[0075] In some examples, the area of ​​the second surface of the reflective structure 2 is smaller than the area of ​​the first surface, and the orthographic projection of the second surface on the plane where the first surface is located is located inside the first surface. That is, the reflective structure 2 in the embodiment of the present disclosure adopts an inverted prism or an inverted truncated cone structure. In this case, the thickness of the peripheral area of ​​the reflective structure 2 increases monotonically from the edge to the center. With this type of reflective structure 2, the radiation performance of the antenna can be improved.

[0076] Further, in the embodiment of the present disclosure, only the structure of the reflective structure 2 adopting the inverted truncated cone is taken as an example, and the first surface and the second surface of the corresponding reflective structure 2 are both circular. Preferably, the center of the first surface, the center of the second surface, the cone tip of the first radiating portion 11, and the center of each annular body of the second radiating portion 12 coincide with the orthographic projection on the plane where the first surface is located, which not only helps to improve the radiation performance of the antenna, but also helps to realize the miniaturized design of the antenna.

[0077] In some examples, no matter which of the above structures is adopted by the antenna of the embodiment of the present disclosure, the radiation structure 1 further includes a parasitic radiation portion arranged on the third opening of the Nth annular body. The parasitic radiation portion can effectively improve the antenna gain.

[0078] In some examples, no matter which structure is adopted by the antenna of the embodiment of the present disclosure, the antenna of the embodiment of the present disclosure further includes a feeding structure for feeding the radiation structure 1. The feeding structure is connected to the radiation structure 1 through a via hole penetrating the reflection structure 2.

[0079] In one example, the feeding structure is a probe, which passes through the center of the reflective structure 2 and the tip of the hollow cone is connected to the radiating structure 1. Of course, the feeding structure can also be a coaxial cable or other structure.

[0080] In order to make the structure of the omnidirectional room antenna of the embodiment of the present disclosure and the effect of the antenna of the embodiment of the present disclosure clearer, a description will be given below with reference to specific examples.

[0081] The first example: Reference Figure 1a and 1b , the antenna comprises a radiation structure 1, a reflection structure 2, a covering layer 3 and a circle of coupling electrodes 4. The radiation part adopts the form of a monoconical antenna, having a first radiation part 11 and a second radiation part 12, the first radiation part 11 is a hollow cone, the first radiation part 11 comprises two annular bodies 121, and the annular bodies 121 are hollow cylinders. The covering layer 3 has a large enough area to cover the outside of the first radiation part 11 and the second radiation part 12, and there is no dielectric filling in the first radiation part 11 and the second radiation part 12. The outer contour of the covering layer 3 is cylindrical. The material of the covering layer 3 can be FR4, whose dielectric constant is 4.4 and the loss tangent is 0.02. The coupling electrode 4 is formed on the outer wall of the covering layer 3, and the coupling electrode 4 is arranged in the middle and lower position of the radiation structure 1, that is, located at the periphery of the first radiation part 11. The reflection structure 2 is an inverted truncated cone, and the thickness of the peripheral area increases monotonically from the edge to the center. The feeding point is located at the center of the first surface of the reflection structure 2, and the feeding structure adopts a probe, which passes through the reflection structure 2 and is connected to the radiation structure 1. The antenna in this example has a height of about 69 mm and has a relatively low profile.

[0082] Figure 2The S11 parameter simulation result of the antenna of the first example. Figure 2 It can be seen that the S11 of the antenna is less than -10dB in the frequency range of 2.50-3.61GHz, and has a wide bandwidth. Figure 3a is the simulation result of the vertical direction pattern of the antenna of the first example; Figure 3a It can be seen that the peak gains of the E-plane and H-plane of the antenna at the frequency of 2.6 GHz are 3.57 dBi and 3.48 dBi respectively, and the 3-dB bandwidth is 46.08 deg and 45.96 deg respectively. Figure 3b is the horizontal direction pattern simulation result of the antenna of the first example; Figure 3b It can be seen that in different cut planes, the difference between the maximum gain and the minimum gain of the antenna is up to 1.12dB, that is, the out-of-roundness is less than 1.12dB, indicating that the antenna has good directivity and omnidirectional radiation.

[0083] Second example: Figure 4 is a schematic diagram of an omnidirectional ceiling antenna in the second example; Figure 4 As shown, the structure of this example is substantially the same as that of the first example, except that the second radiating portion 12 of the antenna includes three annular bodies 121, and the overall height of the antenna is about 65 mm, which is 4 mm lower than that of the first example. The other structures in this example can adopt the same structure as that of the first example, so they will not be described here.

[0084] It should be noted that the second example only takes the second radiation part 12 including three annular bodies 121 as an example. Theoretically, the number of annular bodies 121 can be more, but considering the difficulty of the actual preparation process, the increase in the number of annular bodies 121 will inevitably increase the difficulty of the process. Therefore, the number of annular bodies 121 designed for the actual product should be designed in combination with the process implementation.

[0085] Figure 5 is the S11 parameter simulation result of the antenna of the second example; Figure 5 It can be seen from the figure that the S11 of the antenna is less than -10 dB in the frequency range of 2.52-3.65 GHz, which is basically consistent with the operating frequency of the antenna using two annular bodies 121 in the first example. Figure 6a is the simulation result of the vertical direction pattern of the antenna of the second example; Figure 6a It can be seen that the peak gains of the E-plane and H-plane of the antenna at a frequency of 2.6 GHz are 2.9 dBi and 2.85 dBi respectively, and the 3-dB bandwidths are 49.05 deg and 50.4 deg respectively. The gain is reduced to a certain extent compared with the antenna in Implementation Example 1, and the 3-dB bandwidth is slightly improved. Figure 6bis the horizontal direction pattern simulation result of the antenna of the second example; Figure 6b It can be seen that the out-of-roundness of the antenna is less than 1.38 dB in different cut planes.

[0086] The third example, Figure 7 FIG. 1 is a schematic diagram of an omnidirectional ceiling antenna of the third example; Figure 7 As shown, the structure of this example is substantially the same as that of the first example, and the only difference is that the coupling electrode 4 of this antenna is closer to the cone tip of the first radiating portion 11 than that of the first example, but it should be noted that even though the coupling electrode 4 is close to the cone tip of the first radiating portion 11, it is still at a certain distance from the reflective structure 2 and does not contact the reflective structure 2. The other structures in this antenna can adopt the same structure as the first example, and will not be described in detail here.

[0087] Figure 8 for Figure 7 The S11 parameter simulation results of the antenna shown in Figure 8 It can be seen that the S11 of the antenna is less than -10dB in the frequency ranges of 2.55-3.35GHz and 3.53-3.65GHz, and its operating frequency band is discontinuous. Figure 9a Shown Figure 7 The vertical direction pattern simulation results of the antenna shown in Figure 9a It can be seen that the peak gains of the E-plane and H-plane of the antenna at a frequency of 2.6 GHz are 4.05 dBi and 4.0 dBi respectively, and the 3-dB bandwidths are 47.2 deg and 48.54 deg respectively. The gain and 3-dB bandwidth are slightly improved compared to the antenna in implementation mode one. Figure 9b Shown Figure 7 The horizontal radiation pattern simulation results of the antenna shown in Figure 9b It can be seen that the out-of-roundness of the antenna is less than 1.15dB in different cut planes.

[0088] Fig.10 is a schematic diagram of another omnidirectional ceiling antenna in the third example; Fig.10 As shown, the structure of this example is substantially the same as that of the first example, except that the coupling electrode 4 of this antenna is closer to the third opening of the second annular body 121 of the second radiating portion 12 than that of the first example. The other structures in this antenna can adopt the same structure as that of the first example, and will not be described in detail here.

[0089] Fig.11 for Fig.10 The S11 parameter simulation results of the antenna shown in Fig.11It can be seen that the S11 of the antenna is less than -10dB in the frequency range of 2.59-3.68GHz. Compared with the antenna in the first example, the operating frequency band is higher. Fig.12a for Fig.10 The vertical direction pattern simulation results of the antenna shown in Fig.12a It can be seen that the peak gains of the E-plane and H-plane of the antenna at a frequency of 2.6 GHz are 4.56 dBi and 4.56 dBi respectively, and the 3-dB bandwidths are 43.38 deg and 44.31 deg respectively. The gain is improved to a certain extent compared with the antenna in Implementation Example 1, and the 3-dB bandwidth is slightly reduced. Figure 12b for Fig.10 The horizontal radiation pattern simulation results of the antenna shown in Figure 12b It can be seen that the out-of-roundness of the antenna is less than 0.76 dB in different cut planes.

[0090] In summary, the change in the position of the coupling electrode 4 may improve the radiation performance of the antenna to a certain extent, but moving downward may cause the working frequency band of the antenna to be discontinuous, and moving upward may cause the working frequency band of the antenna to be too high.

[0091] Fourth example: Fig.13 is a schematic diagram of a fourth example of an omnidirectional ceiling antenna; Fig.13 As shown, the structure of this example is substantially the same as that of the first example, except that the number of coupling electrodes 4 of the antenna is two. Of course, the number of coupling electrodes 4 can be more, and increasing the number of coupling electrodes 4 can play a role in expanding bandwidth to a certain extent. The other structures in the antenna can adopt the same structure as the first example, and will not be repeated here.

[0092] Fig.14 is the S11 parameter simulation result of the antenna of the fourth example; Fig.14 It can be seen that the S11 of this antenna is less than -10dB in the frequency ranges of 2.33-2.59GHz and 2.84-3.69GHz. Compared with the first antenna, the antenna bandwidth is wider, but its operating frequency band is discontinuous. Fig.15a is the simulation result of the vertical direction pattern of the antenna of the fourth example; Fig.15a It can be seen that the peak gains of the E-plane and H-plane of the antenna at a frequency of 2.6 GHz are 4.6 dBi and 4.4 dBi respectively, and the 3-dB bandwidths are 42.2 deg and 43.37 deg respectively. The gain is improved to a certain extent compared with the antenna in Implementation Example 1, and the 3-dB bandwidth is slightly reduced. Fig.15b is the horizontal direction pattern simulation result of the antenna of the fourth example; Fig.15bIt can be seen that the out-of-roundness of the antenna is less than 1.84 dB in different cut planes.

[0093] The fifth example: Fig.16 Schematic diagram of the fifth example of an omnidirectional ceiling antenna; Fig.16 As shown, the structure of this example is substantially the same as that of the first example, except that a parasitic radiation portion 13 is provided on the third opening of the second annular body 121 of the antenna. The antenna gain can be effectively improved by the parasitic radiation portion 13. The other structures in the antenna can adopt the same structure as the first example, and will not be described in detail here.

[0094] Fig.17 is the S11 parameter simulation result of the antenna of the fifth example; Fig.17 It can be seen that the S11 of the antenna is less than -10dB in the frequency range of 2.50-3.61GHz, and the operating frequency band is consistent with the antenna in implementation mode 1. Fig.18a is the simulation result of the vertical direction pattern of the antenna of the fifth example; Fig.18a It can be seen that the peak gains of the E-plane and H-plane of the antenna at a frequency of 2.6 GHz are 4.2 dBi and 4.04 dBi respectively, and the 3-dB bandwidths are 43.63 deg and 44.49 deg respectively. The gain is improved to a certain extent compared with the antenna in Implementation Example 1, and the 3-dB bandwidth is slightly reduced. Fig.18b is the horizontal direction pattern simulation result of the antenna of the fifth example; Fig.18b It can be seen that the out-of-roundness of the antenna is less than 1.23dB in different cut planes.

[0095] Example 6: The antenna structure in this example is the same as that in the first example, except that the material of the cover layer 3 is selected. In this example, the material of the cover layer 3 is Arlon AD430A, which has a dielectric constant of 4.3 and a loss tangent of 0.003). The material of the cover layer 3 is Arlon AD450A, which has a dielectric constant of 4.5 and a loss tangent of 0.0035.

[0096] Fig.19 When the material of the covering layer 3 is Arlon AD430A, the S11 parameter simulation result of the antenna is shown in FIG. 19 . As can be seen from FIG. 19 , the S11 of the antenna is less than -10 dB in the frequency range of 2.53-3.64 GHz, and the operating frequency band is basically consistent with the antenna in the first example. Fig.20a When Arlon AD430A is used as the material for the cover layer 3, the vertical direction pattern simulation results of the antenna are as follows; Fig.20aIt can be seen that the peak gains of the E-plane and H-plane of the antenna at a frequency of 2.6 GHz are 3.58 dBi and 3.67 dBi respectively, and the 3-dB bandwidth is 53.03 deg and 52.32 deg respectively. The gain and 3-dB bandwidth are slightly improved compared with the antenna in the first example. Fig.20b When Arlon AD430A is used as the material for the cover layer 3, the horizontal radiation pattern simulation results of the antenna are as follows; Fig.20b It can be seen that the out-of-roundness of the antenna is less than 0.67dB in different cut planes.

[0097] Fig.21 When Arlon AD450A is used as the material for the cover layer 3, the S11 parameter simulation results of the antenna are as follows; Fig.21 It can be seen that the S11 of the antenna is less than -10dB in the frequency range of 2.48-3.60GHz, and the operating frequency band is basically consistent with the antenna in the first example. Fig.22a When Arlon AD450A is used as the material for the cover layer 3, the vertical direction pattern simulation results of the antenna are as follows; Fig.22a It can be seen that the peak gains of the E-plane and H-plane of the antenna at the frequency of 2.6 GHz are 4.21 dBi and 4.13 dBi respectively, and the 3-dB bandwidths are 41.61 deg and 43.06 deg respectively. The gain is improved to a certain extent compared with the antenna in the first example, and the 3-dB bandwidth is slightly reduced. Figure 22b When Arlon AD450A is used as the material for the cover layer 3, the horizontal radiation pattern simulation results of the antenna are as follows; Figure 22b It can be seen that the out-of-roundness of the antenna is less than 1.12dB in different cut planes.

[0098] In summary, if the material of the cover layer 3 is a dielectric material with a dielectric constant close to that of FR4, the working frequency band of the antenna will not change much. However, if a dielectric material with a smaller loss tangent is used, the radiation performance of the antenna will be relatively better. In addition, if the dielectric constant of the dielectric material is far from that of FR4, the overall structure of the antenna needs to be modified accordingly to meet the required requirements.

[0099] The seventh example: Fig.23 is a schematic diagram of a second example of an omnidirectional ceiling antenna; Fig.23 As shown, the structure of this example is substantially the same as that of the first example, except that the reflective structure 2 of the antenna adopts a flat plate structure. Other structures in this example can adopt the same structure as that of the first example, so they will not be described here.

[0100] Fig.24The S11 parameter simulation result of the antenna of the seventh example is shown in the figure. As can be seen from the figure, the S11 of the antenna is less than -10dB in the frequency range of 2.50-2.79GHz and 2.81-3.55GHz, which is narrower than the antenna bandwidth of the first example, and its operating frequency band is discontinuous. Fig.25a is the simulation result of the vertical direction pattern of the antenna of the seventh example; Fig.25a It can be seen that the peak gains of the E-plane and H-plane of the antenna at a frequency of 2.6 GHz are 3.84 dBi and 3.91 dBi respectively, and the 3-dB bandwidths are 42.61 deg and 42.3 deg respectively. The gain is slightly improved compared to the antenna in the first example, and the 3-dB bandwidth is slightly reduced. Fig.25b is the horizontal direction pattern simulation result of the antenna of the seventh example; Fig.25b It can be seen that the out-of-roundness of the antenna is less than 1.39 dB in different cut planes.

[0101] An embodiment of the present disclosure also provides an electronic device, which includes the above-mentioned omnidirectional ceiling antenna.

[0102] In some examples, the electronic device also includes a transceiver unit, a radio frequency transceiver, a signal amplifier, a power amplifier, and a filtering unit. The antenna in the communication device can be used as a transmitting antenna or a receiving antenna. Among them, the transceiver unit may include a baseband and a receiving end. The baseband provides a signal of at least one frequency band, such as a 2G signal, a 3G signal, a 4G signal, a 5G signal, etc., and sends a signal of at least one frequency band to the radio frequency transceiver. After the antenna in the communication system receives the signal, it can be processed by the filtering unit, the power amplifier, the signal amplifier, and the radio frequency transceiver and then transmitted to the receiving end in the transceiver unit. The receiving end may be, for example, a smart gateway.

[0103] Furthermore, the RF transceiver is connected to the transceiver unit, and is used to modulate the signal sent by the transceiver unit, or to demodulate the signal received by the antenna and transmit it to the transceiver unit. Specifically, the RF transceiver may include a transmitting circuit, a receiving circuit, a modulation circuit, and a demodulation circuit. After the transmitting circuit receives various types of signals provided by the baseband, the modulation circuit can modulate the various types of signals provided by the baseband and then send them to the antenna. The antenna receives the signal and transmits it to the receiving circuit of the RF transceiver. The receiving circuit transmits the signal to the demodulation circuit, and the demodulation circuit demodulates the signal and transmits it to the receiving end.

[0104] Furthermore, the RF transceiver is connected to a signal amplifier and a power amplifier, and the signal amplifier and the power amplifier are connected to a filter unit, and the filter unit is connected to at least one antenna. In the process of sending signals in the communication system, the signal amplifier is used to improve the signal-to-noise ratio of the signal output by the RF transceiver and then transmit it to the filter unit; the power amplifier is used to amplify the power of the signal output by the RF transceiver and then transmit it to the filter unit; the filter unit may specifically include a duplexer and a filter circuit, and the filter unit combines the signals output by the signal amplifier and the power amplifier and filters out the clutter before transmitting them to the antenna, and the antenna radiates the signal. In the process of receiving signals in the communication system, the antenna receives the signal and transmits it to the filter unit, and the filter unit filters out the clutter from the signal received by the antenna and then transmits it to the signal amplifier and the power amplifier, and the signal amplifier amplifies the signal received by the antenna to increase the signal-to-noise ratio; the power amplifier amplifies the power of the signal received by the antenna. The signal received by the antenna is processed by the power amplifier and the signal amplifier and then transmitted to the RF transceiver, and the RF transceiver then transmits it to the transceiver unit.

[0105] In some examples, the signal amplifier may include various types of signal amplifiers, such as a low noise amplifier, which is not limited herein.

[0106] In some examples, the electronic device provided by the embodiments of the present disclosure further includes a power management unit, which is connected to a power amplifier to provide the power amplifier with a voltage for amplifying a signal.

[0107] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An omnidirectional ceiling antenna, comprising: radiation structure, a reflective structure and a covering layer; wherein, The reflective structure has a first surface and a second surface arranged opposite to each other along a thickness direction thereof; The radiation structure comprises a first radiation part and a second radiation part, wherein the first radiation part is a hollow cone, and the second radiation part comprises N ring-shaped bodies; the cone tip of the hollow cone is opposite to the first surface; wherein, The hollow cone has a first opening, and each of the annular bodies includes a second opening and a third opening that are arranged opposite to each other, and the second opening is closer to the first opening than the third opening; the second opening of the first annular body is connected to the first opening, and the third opening of the i-th annular body is connected to the second opening of the i+1-th annular body; the outer contour of the orthographic projection of the i-th annular body on the plane where the first surface is located is located within the outer contour of the orthographic projection of the i+1-th annular body on the plane where the first surface is located; N is an integer greater than or equal to 2, and i is 1 to (N-1); The covering layer is disposed on the first surface, surrounds the periphery of the first radiation portion and the second radiation portion, and covers the outer walls of the first radiation portion and the second radiation portion.

2. The omnidirectional ceiling antenna according to claim 1, wherein: It also includes at least one circle of coupling electrodes arranged on the outer wall of the covering layer, wherein the coupling electrodes are spaced a certain distance from the reflecting structure; The orthographic projection of the radiation structure on the plane where the first surface is located is located within the orthographic projection of any one of the coupling electrodes on the plane where the first surface is located.

3. The omnidirectional ceiling antenna according to claim 2, wherein: The height of the radiation structure is H1, and the distance between the coupling electrode closest to the first surface among the at least one circle of coupling electrodes and the first surface is L1; the distance between the coupling electrode farthest from the first surface among the at least one circle of coupling electrodes and the plane where the third opening of the Nth annular body is located is L2, L1:H1 is (0.5*H2) / H1~(H1-0.5*b) / H1, and L2:H1 is (0.5*H2) / H1~(H1-0.5*b) / H1; H2 is the height of the hollow cone, and b is the width of the coupling electrode.

4. The omnidirectional ceiling antenna according to claim 2, wherein: The number of the coupling electrodes is multiple, the spacing between adjacent coupling electrodes is a, the width of the coupling electrodes is b, and a:b is 1:2 to 2:

1.

5. The omnidirectional ceiling antenna according to any one of claims 1 to 4, wherein: The radiation structure further includes a parasitic radiation portion disposed on the third opening of the Nth annular body.

6. The omnidirectional ceiling antenna according to any one of claims 1 to 4, wherein: The second surface is smaller than the first surface in area, and the orthographic projection of the first surface on the plane where the second surface is located covers the second surface.

7. The omnidirectional ceiling antenna according to claim 6, wherein: The center of the orthographic projection of the first surface on the plane where the second surface is located coincides with the center of the second surface.

8. The omnidirectional ceiling antenna according to any one of claims 1 to 4, wherein: The reflection structure is a frustum or a prism.

9. The omnidirectional ceiling antenna according to any one of claims 1 to 4, wherein: The center of the orthographic projection of each annular body on the plane where the second surface is located and the orthographic projection of the cone tip of the hollow cone on the plane where the second surface is located both coincide with the center of the second surface.

10. The omnidirectional ceiling antenna according to any one of claims 1 to 4, wherein: The center of the orthographic projection of the covering layer on the plane where the second surface is located coincides with the center of the orthographic projection of each annular body on the plane where the second surface is located and the orthographic projection of the cone tip of the hollow cone on the plane where the second surface is located.

11. The omnidirectional ceiling antenna according to any one of claims 1 to 4, wherein: The material of the cover layer includes any one of FR4, Arlon AD430A, and Arlon AD450A.

12. The omnidirectional ceiling antenna according to any one of claims 1 to 4, wherein: The annular body is a hollow cylinder.

13. The omnidirectional ceiling antenna according to any one of claims 1 to 4, wherein: It also includes a feeding structure, which is connected to the radiation structure through a via hole penetrating the reflection structure.

14. The omnidirectional ceiling antenna according to claim 13, wherein: The feeding structure is a probe, the probe passes through the center of the reflective structure, and the cone tip of the hollow cone is connected to the radiation structure.

15. The omnidirectional ceiling antenna according to any one of claims 1 to 4, wherein: The first radiation portion and the second radiation portion are an integrally formed structure.

16. An electronic device comprising the omnidirectional ceiling antenna according to any one of claims 1 to 15.

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