Omnidirectional ceiling antenna and electronic device

Abstract

The present disclosure relates to the technical field of communications, and provides an omnidirectional ceiling antenna and an electronic device. The omnidirectional ceiling antenna of the present disclosure comprises a radiation structure, a reflection structure, and a covering layer; the reflection structure has a first surface and a second surface which are arranged opposite to each other in the thickness direction of the reflection structure; the radiation structure comprises a first radiation portion and a second radiation portion, the first radiation portion is a hollow cone, and the second radiation portion comprises N annular bodies; the hollow cone has a first opening, and each annular body comprises a second opening and a third opening which are arranged opposite to each other; the second opening of a first annular body is connected to the first opening, and the third opening of an ith annular body is connected to the second opening of an (i+1)th annular body; the outer contour of the orthographic projection of the ith annular body on a 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; and the covering layer is arranged on the first surface, surrounds the peripheries 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.

Description

Omnidirectional ceiling antenna and electronic device TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of communication, and particularly relates to an omnidirectional ceiling antenna and an electronic device. BACKGROUND

[0002] In the existing indoor distribution system, in order to realize high-speed and high-reliability wireless communication, the application of 5th Generation Mobile Communication Technology (5G) technology is increasingly widespread. However, in the distribution system of 5G signals, due to the large amount of user data, the requirements for high gain, wide beam, omnidirectional coverage of the antenna are becoming higher and higher, and therefore it is an urgent technical problem to be solved to provide an indoor distribution system with high gain, wide beam and omnidirectional coverage. SUMMARY

[0003] The present disclosure aims to at least solve one of the technical problems existing in the prior art, and provides an omnidirectional ceiling antenna and an electronic device.

[0004] The present disclosure provides an omnidirectional ceiling antenna, which comprises a radiation structure, a reflection structure and a cover layer, wherein,

[0005] The reflection structure has a first surface and a second surface oppositely arranged along the thickness direction thereof;

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

[0007] The hollow pyramid has a first opening, each of the ring-shaped bodies comprises a second opening and a third opening oppositely arranged, and the second opening is closer to the first opening than the third opening; the second opening of the first ring-shaped body is connected to the first opening, the third opening of the i-th ring-shaped body is connected to the second opening of the (i+1)-th ring-shaped body; the outer contour of the i-th ring-shaped body in the normal projection of the first surface is located within the outer contour of the (i+1)-th ring-shaped body in the normal projection of the first surface; N is an integer greater than or equal to 2, and i is 1 to (N-1);

[0008] The cover layer is arranged on the first surface, surrounds the periphery of the first radiation part and the second radiation part, and covers the outer wall of the first radiation part and the second radiation part.

[0009] The omnidirectional ceiling antenna further comprises at least one coupling electrode arranged on the outer wall of the cover layer, and the coupling electrode has a certain spacing with the reflecting structure.

[0010] The projection of the radiating structure on the plane where the first surface is located is located in the projection of any coupling electrode on the plane where the first surface is located.

[0011] The height of the radiating structure is H1, the spacing between the coupling electrode closest to the first surface in the at least one coupling electrode and the first surface is L1, the distance between the coupling electrode farthest from the first surface in the at least one coupling electrode and the plane where the third opening of the Nth ring body is located is L2, 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.

[0012] The number of the coupling electrodes is multiple, the spacing between the adjacent coupling electrodes is a, and the width of the coupling electrode is b, a:b is 1:2~2:1.

[0013] The radiating structure further comprises a parasitic radiation part arranged on the third opening of the Nth ring body.

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

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

[0016] The reflecting structure is a circular truncated cone or a prismatic truncated cone.

[0017] The center of the projection of each ring body on the plane where the second surface is located and the center of the 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 projection of the cover layer on the plane where the second surface is located coincides with the center of the projection of each ring body on the plane where the second surface is located and the center of the 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 comprises any one of FR4, Arlon AD430A, and Arlon AD450A.

[0020] The ring body is a hollow cylinder.

[0021] The omnidirectional ceiling antenna further comprises a feeding structure, and the feeding structure is connected with the radiation structure through a via hole penetrating through the reflecting structure.

[0022] The feeding structure is a probe, the probe penetrates through the center of the reflecting structure, and the tip of the hollow cone is connected with the radiation structure.

[0023] The first radiation part and the second radiation part are integrally formed.

[0024] The electronic device comprises the omnidirectional ceiling antenna. BRIEF DESCRIPTION OF DRAWINGS

[0025] FIG. 1a is a schematic diagram of an omnidirectional ceiling antenna according to an embodiment of the present disclosure.

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

[0027] FIG. 2 is a simulation result of an S11 parameter of the antenna according to the first example.

[0028] FIG. 3a is a simulation result of a vertical direction pattern of the antenna according to the first example.

[0029] FIG. 3b is a simulation result of a horizontal direction pattern of the antenna according to the first example.

[0030] FIG. 4 is a schematic diagram of an omnidirectional ceiling antenna according to a second example.

[0031] FIG. 5 is a simulation result of an S11 parameter of the antenna according to the second example.

[0032] FIG. 6a is a simulation result of a vertical direction pattern of the antenna according to the second example.

[0033] FIG. 6b is a simulation result of a horizontal direction pattern of the antenna according to the second example.

[0034] FIG. 7 is a schematic diagram of an omnidirectional ceiling antenna according to a third example.

[0035] FIG. 8 is a simulation result of an S11 parameter of the antenna according to the third example.

[0036] FIG. 9a is a simulation result of a vertical direction pattern of the antenna according to the third example.

[0037] FIG. 9b is a simulation result of a horizontal direction pattern of the antenna according to the third example.

[0038] FIG. 10 is a schematic diagram of another omnidirectional ceiling antenna according to the third example.

[0039] Fig. 11 is a simulation result of S11 parameter of the antenna shown in Fig. 10.

[0040] Fig. 12a is a simulation result of vertical direction pattern of the antenna shown in Fig. 10.

[0041] Fig. 12b is a simulation result of horizontal direction pattern of the antenna shown in Fig. 10.

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

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

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

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

[0046] Fig. 16 is a schematic diagram of a fifth example of an omnidirectional ceiling antenna.

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

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

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

[0050] Fig. 19 is a simulation result of S11 parameter of the antenna when the material of the cover layer is Arlon AD430A.

[0051] Fig. 20a is a simulation result of vertical direction pattern of the antenna when the material of the cover layer is Arlon AD430A.

[0052] Fig. 20b is a simulation result of horizontal direction pattern of the antenna when the material of the cover layer is Arlon AD430A.

[0053] Fig. 21 is a simulation result of S11 parameter of the antenna when the material of the cover layer is Arlon AD450A.

[0054] Fig. 22a is a simulation result of vertical direction pattern of the antenna when the material of the cover layer is Arlon AD450A.

[0055] Fig. 22b is a simulation result of horizontal direction pattern of the antenna when the material of the cover layer is Arlon AD450A.

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

[0057] FIG. 24 is a simulation result of S11 parameters of the seventh exemplary antenna.

[0058] FIG. 25a is a simulation result of a vertical directional pattern of the seventh exemplary antenna.

[0059] FIG. 25b is a simulation result of a horizontal directional pattern of the seventh exemplary antenna. DETAILED DESCRIPTION

[0060] In order to make the skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0061] In order to make the skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0062] Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present disclosure shall have the ordinary meaning understood by a person of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "include" or "contain" and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects.

[0063] As used herein, "parallel", "perpendicular" include the stated case and a case similar to the stated case within an acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement being discussed and the error related to the measurement of a specific quantity (i.e., the limitation of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, wherein the acceptable deviation range of approximate parallel may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicular and approximate perpendicular, wherein the acceptable deviation range of approximate perpendicular may also be, for example, a deviation within 5°.

[0064] In the description of the present disclosure, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure.

[0065] Unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0066] Fig. 1a is a schematic diagram of an omnidirectional ceiling antenna according to an embodiment of the present disclosure; Fig. 1b is a side view of an omnidirectional ceiling antenna according to an embodiment of the present disclosure; As shown in Figs. 1a and 1b, the omnidirectional ceiling antenna according to an embodiment of the present disclosure includes a radiation structure 1, a reflection structure 2 and a cover layer 3. Wherein, the reflection structure 2 includes a first surface and a second surface oppositely arranged along the thickness direction thereof. The radiation structure 1 is mainly composed of two parts, which are respectively referred to as first radiation part 11 and second radiation part 12 along the direction away from the first surface of the reflection structure 2. The cover 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 wall of the first radiation part 11 and the second radiation part 12. The arrangement of the cover layer 3 helps to realize low profile.

[0067] Referring to FIG. 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 pyramid, and the tip of the pyramid points to the first surface of the reflecting structure 2; the second radiation part 12 is composed of N annular bodies 121 connected in sequence. Specifically, the hollow pyramid has a first opening, each annular body 121 includes a second opening and a third opening arranged oppositely, 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, 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 i-th annular body 121 in the projection on the plane of the first surface is located within the outer contour of the (i+1)-th annular body 121 in the projection on the plane of the first surface; 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 of the two. For example, the second radiation part 12 includes two annular bodies 121, forming a one-step structure; the second radiation part 12 includes three annular bodies 121, forming a two-step structure. Through the above arrangement, the antenna with a wide bandwidth and a low profile can be realized in the embodiment of the present disclosure.

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

[0069] In some examples, the material of the covering layer 3 in the embodiments 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 covering layer 3 needs to be large enough to cover the outer side of the first radiation part 11 and the second radiation part 12, but there is no filling of the covering layer 3 in the inner cavity of the first radiation part 11 and the second radiation part 12.

[0070] Further, the outer contour of the covering layer 3 can be cylindrical, and of course, the outer contour of the covering layer 3 can be prismatic. In the embodiments of the present disclosure, the outer contour of the covering layer 3 is taken as an example of being cylindrical. When the outer contour of the covering layer 3 is cylindrical, the first radiation structure 1 is a hollow cone, and the annular body 121 of the second radiation part 12 is a hollow cylinder, the centers of the first opening, the second opening, the third opening, and the outer contour of the covering layer 3 in the normal projection of the first surface of the reflecting structure 2 coincide. In this way, it is helpful to realize the miniaturization of the antenna volume.

[0071] In some examples, the omnidirectional ceiling antenna in the embodiments of the present disclosure not only includes the above structure, but also includes at least one ring of coupling electrodes 4 arranged on the outer wall of the covering layer 3, and the coupling electrodes 4 and the reflecting structure 2 have a certain spacing and do not contact each other. The normal projection of the radiation structure 1 on the plane of the first surface is located within the normal projection of any coupling electrode 4 on the plane of the first surface. In the embodiments of the present disclosure, by arranging the annular coupling electrodes 4 on the outer wall of the covering layer 3, the impedance matching of the antenna is improved to some extent, so that the performance of the antenna can be improved. Further, the coupling electrodes 4 can be made of conductive materials such as metal.

[0072] In some examples, the position of the coupling electrodes 4 relative to the radiation structure 1 has a certain influence on improving the radiation performance of the antenna. For example, if the distance between the coupling electrodes 4 and the tip of the first radiation part 11 is too small, it may cause the working frequency band of the antenna to be discontinuous, and if the distance between the coupling electrodes 4 and the third opening of the ring-shaped body 121 (the Nth ring-shaped body 121) farthest from the first radiation part 11 is too small, it may cause the working frequency band of the antenna to be too high, so a reasonable position of the coupling electrodes 4 relative to the radiation structure 1 is needed. In the embodiments 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 the at least one ring of coupling electrodes 4 and the first surface is L1; the distance between the coupling electrode 4 farthest from the first surface in the at least one ring of coupling electrodes 4 and the plane of the third opening of the Nth ring-shaped body 121 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 embodiments of the present disclosure can be one, two or even more. Reasonably setting the number of coupling electrodes 4 can expand the bandwidth of the antenna to a certain extent.

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

[0075] In some examples, the area of the second surface of the reflecting 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 in the first surface. That is, the reflecting structure 2 in the embodiments of the present disclosure adopts the structure of an inverted truncated pyramid or an inverted truncated circular cone. In this case, the thickness of the peripheral region of the reflecting structure 2 monotonically increases from the edge to the center. The reflecting structure 2 in this way can improve the radiation performance of the antenna.

[0076] Further, in the embodiments of the present disclosure, only the structure of the reflecting structure 2 adopting an inverted truncated circular cone is taken as an example, and the first surface and the second surface of the corresponding reflecting structure 2 are both circular. Preferably, the center of the first surface, the center of the second surface, the tip of the first radiation part 11, and the center of each annular body of the second radiation part 12 are coincident in the orthographic projection on the plane where the first surface is located. This way not only helps to improve the radiation performance of the antenna, but also facilitates the miniaturization design of the antenna.

[0077] In some examples, regardless of the structure of the antenna in the embodiments of the present disclosure, the radiation structure 1 further includes a parasitic radiation part arranged on the third opening of the Nth annular body. The parasitic radiation part can effectively improve the antenna gain.

[0078] In some examples, regardless of the structure of the antenna in the embodiments of the present disclosure, the antenna in the embodiments of the present disclosure further includes a feeding structure for feeding the radiation structure 1. The feeding structure is connected with the radiation structure 1 through a via hole penetrating the reflecting structure 2.

[0079] In one example, the feeding structure is a probe, which penetrates the center of the reflecting structure 2 and is connected with the radiation structure 1 at the tip of the hollow cone. Of course, the feeding structure can also adopt a coaxial cable structure.

[0080] In order to more clearly show the structure of the omnidirectional indoor antenna in the embodiments of the present disclosure and the effect of the antenna in the embodiments of the present disclosure, the following will be described in conjunction with specific examples.

[0081] The first example: refer to Fig. 1a and 1b, the antenna includes a radiating structure 1, a reflecting structure 2, a covering layer 3 and a coupling electrode 4. The radiating structure 1 is in the form of a single cone antenna, which has a first radiating part 11 and a second radiating part 12. The first radiating part 11 is a hollow circular cone, and the first radiating part 11 includes two annular bodies 121, which are hollow cylinders. The covering layer 3 is large enough to cover the outer sides of the first radiating part 11 and the second radiating part 12, and the first radiating part 11 and the second radiating part 12 are not filled with dielectric. The outer contour of the covering layer 3 is in the form of a cylinder. The material of the covering layer 3 can be FR4, which has a dielectric constant of 4.4 and a loss tangent of 0.02. The coupling electrode 4 is formed on the outer wall of the covering layer 3 and is arranged at a position slightly below the middle of the radiating structure 1, i.e., at the periphery of the first radiating part 11. The reflecting structure 2 is in the form of an inverted circular table, and the thickness of the peripheral region monotonically increases from the edge to the center. The feeding point is located at the center of the first surface of the reflecting structure 2, and the feeding structure is in the form of a probe, which penetrates through the reflecting structure 2 and is connected to the radiating structure 1. The height of the antenna in this example is about 69 mm, which has a relatively low profile.

[0082] Fig. 2 is the simulation result of the S11 parameter of the antenna in the first example. As can be seen from Fig. 2, the S11 of the antenna is less than -10 dB in the frequency range of 2.50-3.61 GHz, which has a relatively wide bandwidth. Fig. 3a is the simulation result of the vertical directional pattern of the antenna in the first example. As can be seen from Fig. 3a, the peak gains of the E plane and the H plane of the antenna at the frequency point of 2.6 GHz are 3.57 dBi and 3.48 dBi respectively, and the 3-dB beam widths are 46.08 deg and 45.96 deg respectively. Fig. 3b is the simulation result of the horizontal directional pattern of the antenna in the first example. As can be seen from Fig. 3b, the difference between the maximum gain and the minimum gain of the antenna in different cross sections is at most 1.12 dB, i.e., the non-circularity is less than 1.12 dB, which indicates that the directivity of the antenna is good and the antenna has omnidirectional radiation.

[0083] The second example: Fig. 4 is a schematic diagram of an omnidirectional ceiling antenna in the second example. As shown in Fig. 4, the structure of this example is basically the same as that of the first example, and the only difference is that the second radiating part 12 of the antenna includes three annular bodies 121, and the overall height of the antenna is about 65 mm, which is reduced by 4 mm compared with the first example. The other structures in this example can adopt the same structures as those in the first example, and thus 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, and theoretically, the number of annular bodies 121 can be more. However, considering the difficulty of actual manufacturing process, the increase in the number of annular bodies 121 will inevitably increase the difficulty of the process, so the number of annular bodies 121 designed in the actual product should be designed in combination with the process implementation.

[0085] FIG. 5 is a simulation result of the S11 parameter of the antenna of the second example. As can be seen from FIG. 5, 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 with two annular bodies 121 in the first example. FIG. 6a is a simulation result of the vertical direction pattern of the antenna of the second example. As can be seen from FIG. 6a, the peak gains of the E plane and the H plane of the antenna at the frequency point 2.6 GHz are 2.9 dBi and 2.85 dBi respectively, and the 3-dB beam widths are 49.05 deg and 50.4 deg respectively. Compared with the antenna in the first embodiment, the gain is reduced to a certain extent, and the 3-dB beam width is slightly improved. FIG. 6b is a simulation result of the horizontal direction pattern of the antenna of the second example. As can be seen from FIG. 6b, the non-circularity of the antenna is less than 1.38 dB in different cross sections.

[0086] The third example, FIG. 7 is a schematic diagram of an omnidirectional ceiling antenna of the third example. As shown in FIG. 7, the structure of this example is basically the same as that of the first example, and the only difference is that the coupling electrode 4 of the antenna is closer to the tapered tip of the first radiation part 11 than the first example. However, it should be noted that even if the coupling electrode 4 is close to the tapered tip of the first radiation part 11, it still has a certain distance from the reflecting structure 2 and does not contact the reflecting structure 2. The other structures in the antenna can adopt the same structure as the first example, which will not be described here.

[0087] FIG. 8 is a simulation result of the S11 parameter of the antenna shown in FIG. 7. As can be seen from FIG. 8, the S11 of the antenna is less than -10 dB in the frequency range of 2.55-3.35 GHz and 3.53-3.65 GHz, and the operating frequency band is discontinuous. FIG. 9a shows a simulation result of the vertical direction pattern of the antenna shown in FIG. 7. As can be seen from FIG. 9a, the peak gains of the E plane and the H plane of the antenna at the frequency point 2.6 GHz are 4.05 dBi and 4.0 dBi respectively, and the 3-dB beam widths are 47.2 deg and 48.54 deg respectively. Compared with the antenna in the first embodiment, the gain and the 3-dB beam width are slightly improved. FIG. 9b shows a simulation result of the horizontal direction pattern of the antenna shown in FIG. 7. As can be seen from FIG. 9b, the non-circularity of the antenna is less than 1.15 dB in different cross sections.

[0088] Fig. 10 is a schematic view of another omnidirectional ceiling antenna in a third example; as shown in Fig. 10, the structure of this example is substantially the same as that of the first example, the only difference being that the coupling electrode 4 of this antenna is closer to the third opening of the second loop body 121 of the second radiation part 12 than in the first example. The other structures in this antenna can all adopt the same structures as in the first example, and will not be described again here.

[0089] Fig. 11 is a simulation result of the S11 parameter of the antenna shown in Fig. 10; as can be seen from Fig. 11, the S11 of this antenna is less than -10 dB in the frequency range of 2.59-3.68 GHz, and the operating frequency band is higher than that of the antenna in the first example. Fig. 12a is a simulation result of the vertical directional pattern of the antenna shown in Fig. 10; as can be seen from Fig. 12a, the peak gains of the E plane and the H plane of this antenna at the frequency point 2.6 GHz are 4.56 dBi and 4.56 dBi respectively, and the 3-dB beamwidths are 43.38 deg and 44.31 deg respectively, and the gain is improved to a certain extent compared with the antenna in the first example, and the 3-dB beamwidth is slightly reduced. Fig. 12b is a simulation result of the horizontal directional pattern of the antenna shown in Fig. 10; as can be seen from Fig. 12b, the asphericity of the antenna is less than 0.76 dB in different cross sections.

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

[0091] The fourth example: Fig. 13 is a schematic view of an omnidirectional ceiling antenna in a fourth example; as shown in Fig. 13, the structure of this example is substantially the same as that of the first example, the only difference being that the number of coupling electrodes 4 of this antenna is two. Of course, the number of coupling electrodes 4 can also be more, and increasing the number of coupling electrodes 4 can expand the bandwidth to a certain extent. The other structures in this antenna can all adopt the same structures as in the first example, and will not be described again here.

[0092] Figure 14 is a simulation result of the S11 parameter of the fourth example antenna; as can be seen from Figure 14, the S11 of the antenna is less than -10 dB in the frequency range of 2.33-2.59 GHz and 2.84-3.69 GHz, which is wider than the antenna bandwidth of the first example antenna, but the working frequency band is discontinuous. Figure 15a is a simulation result of the vertical direction pattern of the fourth example antenna; as can be seen from Figure 15a, the peak gains of the E-plane and the H-plane of the antenna at the frequency point of 2.6 GHz are 4.6 dBi and 4.4 dBi respectively, and the 3-dB beamwidths are 42.2 deg and 43.37 deg respectively, the gain is improved to a certain extent compared with the antenna in the first example, and the 3-dB beamwidth is slightly reduced. Figure 15b is a simulation result of the horizontal direction pattern of the fourth example antenna; as can be seen from Figure 15b, the non-circularity of the antenna is less than 1.84 dB in different cross sections.

[0093] The fifth example: Figure 16 is a schematic diagram of the fifth example omnidirectional ceiling antenna; as shown in Figure 16, the structure of this example is basically the same as that of the first example, the only difference is that a parasitic radiation part 13 is arranged on the third opening of the second ring-shaped body 121 of the antenna. The parasitic radiation part 13 can effectively improve the antenna gain. The structures of other parts of the antenna can be the same as those of the first example, and will not be described here.

[0094] Figure 17 is a simulation result of the S11 parameter of the fifth example antenna; as can be seen from Figure 17, the S11 of the antenna is less than -10 dB in the frequency range of 2.50-3.61 GHz, and the working frequency band is the same as that of the antenna in the first example. Figure 18a is a simulation result of the vertical direction pattern of the fifth example antenna; as can be seen from Figure 18a, the peak gains of the E-plane and the H-plane of the antenna at the frequency point of 2.6 GHz are 4.2 dBi and 4.04 dBi respectively, and the 3-dB beamwidths are 43.63 deg and 44.49 deg respectively, the gain is improved to a certain extent compared with the antenna in the first example, and the 3-dB beamwidth is slightly reduced. Figure 18b is a simulation result of the horizontal direction pattern of the fifth example antenna; as can be seen from Figure 18b, the non-circularity of the antenna is less than 1.23 dB in different cross sections.

[0095] The sixth example: the structure of the antenna in this example is the same as that in the first example, the only difference is the material selection of the covering layer 3, in this example, the material of the covering layer 3 is Arlon AD430A, the dielectric constant is 4.3, and the loss tangent is 0.003. The material of the covering layer 3 is Arlon AD450A, the dielectric constant is 4.5, and the loss tangent is 0.0035.

[0096] Figure 19 is a simulation result of the S11 parameter of the antenna when the material of the cover layer 3 is Arlon AD430A; it can be seen from Figure 19 that 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 the same as that of the antenna of the first example. Figure 20a is a simulation result of the vertical directional pattern of the antenna when the material of the cover layer 3 is Arlon AD430A; it can be seen from Figure 20a that the peak gains of the E-plane and the H-plane of the antenna at the frequency point of 2.6 GHz are 3.58 dBi and 3.67 dBi respectively, and the 3-dB beam widths are 53.03 deg and 52.32 deg respectively, and the gain and the 3-dB beam width are slightly improved compared with those of the antenna of the first example. Figure 20b is a simulation result of the horizontal directional pattern of the antenna when the material of the cover layer 3 is Arlon AD430A; it can be seen from Figure 20b that the non-circularity of the antenna is less than 0.67 dB in different cross sections.

[0097] Figure 21 is a simulation result of the S11 parameter of the antenna when the material of the cover layer 3 is Arlon AD450A; it can be seen from Figure 21 that the S11 of the antenna is less than -10 dB in the frequency range of 2.48-3.60 GHz, and the operating frequency band is basically the same as that of the antenna of the first example. Figure 22a is a simulation result of the vertical directional pattern of the antenna when the material of the cover layer 3 is Arlon AD450A; it can be seen from Figure 22a that the peak gains of the E-plane and the H-plane of the antenna at the frequency point of 2.6 GHz are 4.21 dBi and 4.13 dBi respectively, and the 3-dB beam widths are 41.61 deg and 43.06 deg respectively, and the gain is improved to a certain extent compared with that of the antenna of the first example, and the 3-dB beam width is slightly reduced. Figure 22b is a simulation result of the horizontal directional pattern of the antenna when the material of the cover layer 3 is Arlon AD450A; it can be seen from Figure 22b that the non-circularity of the antenna is less than 1.12 dB in different cross sections.

[0098] In summary, when the material of the cover layer 3 is a dielectric material with a dielectric constant close to that of FR4, the operating frequency band of the antenna will not change too much. However, when a dielectric material with a small 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 greatly different from that of FR4, the overall structure of the antenna needs to be modified accordingly to meet the requirements.

[0099] The seventh example: Figure 23 is a schematic diagram of the omnidirectional ceiling antenna of the second example; as shown in Figure 23, the structure of this example is basically the same as that of the first example, and the only difference is that the reflecting structure 2 of the antenna adopts a flat plate structure. The structures of other structures in this example can be the same as those of the first example, and therefore will not be described here.

[0100] Figure 24 is a simulation result of the S11 parameter of the seventh example antenna. As can be seen from the figure, the S11 of the antenna is less than -10 dB in the frequency range of 2.50-2.79 GHz and 2.81-3.55 GHz, which is narrower than the bandwidth of the first example antenna, and the working frequency band is discontinuous. Figure 25a is a simulation result of the vertical direction pattern of the seventh example antenna; as can be seen from Figure 25a, the peak gains of the E-plane and the H-plane of the antenna at the frequency point 2.6 GHz are 3.84 dBi and 3.91 dBi respectively, and the 3-dB beamwidths are 42.61 deg and 42.3 deg respectively, which are slightly improved compared with the first example antenna, and the 3-dB beamwidth is slightly reduced. Figure 25b is a simulation result of the horizontal direction pattern of the seventh example antenna; as can be seen from Figure 25b, the asphericity of the antenna is less than 1.39 dB in different cross sections.

[0101] The embodiments of the present disclosure also provide an electronic device comprising the omnidirectional ceiling antenna described above.

[0102] In some examples, the electronic device further comprises a transceiving unit, a radio frequency transceiver, a signal amplifier, a power amplifier, and a filter unit. The antenna in the communication device can serve as a transmitting antenna or a receiving antenna. The transceiving unit can include a baseband and a receiving end, the baseband provides at least one frequency band of signals, such as 2G signals, 3G signals, 4G signals, 5G signals, etc., and sends at least one frequency band of signals to the radio frequency transceiver. After the antenna in the communication system receives the signal, it can be transmitted to the receiving end in the transceiving unit after being processed by the filter unit, the power amplifier, the signal amplifier, and the radio frequency transceiver. The receiving end can be a smart gateway, etc.

[0103] Further, the radio frequency transceiver is connected to the transceiving unit, for modulating the signal sent by the transceiving unit, or for demodulating the signal received by the antenna and transmitting it to the transceiving unit. Specifically, the radio frequency transceiver can include a transmitting circuit, a receiving circuit, a modulation circuit, and a demodulation circuit. After the transmitting circuit receives multiple types of signals provided by the baseband, the modulation circuit can modulate the multiple types of signals provided by the baseband and then send them to the antenna. The receiving circuit of the radio frequency transceiver transmits the received signal to the demodulation circuit, and the demodulation circuit demodulates the signal and then transmits it to the receiving end.

[0104] Further, the radio frequency transceiver is connected with the signal amplifier and the power amplifier, the signal amplifier and the power amplifier are connected with the filter unit, and the filter unit is connected with the at least one antenna. In the process of transmitting signals by the communication system, the signal amplifier is used to improve the signal-to-noise ratio of the signal output by the radio frequency transceiver and then transmit the signal to the filter unit; the power amplifier is used to amplify the power of the signal output by the radio frequency transceiver and then transmit the signal to the filter unit; the filter unit can specifically include a duplexer and a filter circuit, the filter unit combines and filters the signals output by the signal amplifier and the power amplifier and then transmits the signals to the antenna, and the antenna radiates the signals. In the process of receiving signals by the communication system, the antenna receives the signals and then transmits the signals to the filter unit, the filter unit filters the signals received by the antenna and then transmits the signals to the signal amplifier and the power amplifier, the signal amplifier increases the gain of the signals received by the antenna and increases the signal-to-noise ratio of the signals, and the power amplifier amplifies the power of the signals received by the antenna. The signals received by the antenna are processed by the power amplifier and the signal amplifier and then transmitted to the radio frequency transceiver, and the radio frequency transceiver transmits the signals to the transceiver unit.

[0105] In some examples, the signal amplifier can include various types of signal amplifiers, such as a low-noise amplifier, without limitation.

[0106] In some examples, the electronic device provided by the embodiment of the present disclosure further includes a power management unit, and the power management unit is connected with the power amplifier and provides a voltage for the power amplifier to amplify signals.

[0107] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also regarded as the protection scope of the present application.

Claims

1. An omni-directional ceiling mount antenna comprising: Radiation Structure, reflecting structure and covering layer; wherein, The reflecting structure has a first surface and a second surface oppositely arranged along the thickness direction thereof; 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 ring bodies; a tip of the hollow cone is opposite to the first surface; wherein, The hollow cone has a first opening, each of the ring bodies comprises a second opening and a third opening oppositely arranged, and the second opening is closer to the first opening than the third opening; the second opening of the first ring body is connected to the first opening, the third opening of the i-th ring body is connected to the second opening of the (i+1)-th ring body; the outer contour of the i-th ring body in the orthographic projection on the plane where the first surface is located is within the outer contour of the (i+1)-th ring body in the orthographic projection 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 arranged on the first surface, surrounds the periphery of the first radiation part and the second radiation part, and covers the outer wall of the first radiation part and the second radiation part.

2. The omni-directional ceiling mount antenna of claim 1, wherein, Further comprising at least one ring of coupling electrodes arranged on the outer wall of the covering layer, the coupling electrodes have a certain spacing with the reflecting structure; The orthographic projection of the radiation structure on the plane where the first surface is located is within the orthographic projection of any coupling electrode on the plane where the first surface is located.

3. The omni-directional ceiling mount antenna of claim 2, wherein, The height of the radiation structure is H1, the spacing between the coupling electrode closest to the first surface in the at least one ring of coupling electrodes and the first surface is L1, the distance between the coupling electrode farthest from the first surface in the at least one ring of coupling electrodes and the plane where the third opening of the N-th ring body is located is L2, L1:H1 is (0.5*H2) / H1 to (H1-0.5*b) / H1, L2:H1 is (0.5*H2) / H1 to (H1-0.5*b) / H1; H2 is the height of the hollow cone, and b is the width of the coupling electrode.

4. The omni-directional ceiling mount antenna of claim 2, wherein, The number of the coupling electrodes is multiple, the spacing between the adjacent coupling electrodes is a, and the width of the coupling electrode is b, a:b is 1:2 to 2:

1.

5. The omni-directional ceiling-mountable antenna according to any of claims 1-4, wherein, The radiation structure further comprises a parasitic radiation part arranged on the third opening of the N-th ring body.

6. The omni-directional ceiling-mountable antenna of any of claims 1-4, 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 omni-directional ceiling mount antenna of 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 omni-directional ceiling-mountable antenna of any of claims 1-4, wherein, The reflecting structure is a circular truncated cone or a prismatic truncated cone.

9. The omni-directional ceiling-mountable antenna of any of claims 1-4, wherein, The center of the orthographic projection of each ring body on the plane where the second surface is located and the 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 omni-directional ceiling-mountable antenna of any of claims 1-4, 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 ring body on the plane where the second surface is located and the tip of the hollow cone on the plane where the second surface is located.

11. The omni-directional ceiling-mountable antenna of any of claims 1-4, wherein, The material of the cover layer includes any one of FR4, Arlon AD430A, Arlon AD450A.

12. The omni-directional ceiling-mountable antenna of any of claims 1-4, wherein, The ring-shaped body is a hollow cylinder.

13. The omni-directional ceiling-mountable antenna of any of claims 1-4, wherein, Further comprising a feeding structure connected with the radiation structure through a via hole penetrating the reflecting structure.

14. The omni-directional ceiling mountable antenna of claim 13, wherein, The feeding structure is a probe penetrating the center of the reflecting structure, and the cone tip of the hollow cone is connected with the radiation structure.

15. The omni-directional ceiling-mountable antenna of any of claims 1-4, wherein, The first radiation part and the second radiation part are integrally formed.

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

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