An antenna for a ceiling-mounted ONU

Abstract

The present invention discloses an antenna for a ceiling-mounted ONU, which includes a radiator and a ground wire. The radiator includes a first radiation surface, a second radiation surface, a third radiation surface, a fourth radiation surface, and a fifth radiation surface. The ground wire includes a first rectangular surface, a second rectangular surface, and a third rectangular surface. The first rectangular surface, the second rectangular surface, and the third rectangular surface form a "concave" structure. Through the coplanar layout of the first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface, and the way they are interconnected with each other, the present invention achieves structural compactness, reduces the overall size of the antenna, and also improves the space utilization rate, making the antenna more suitable for application scenarios with strict size requirements such as the ceiling-mounted ONU structure.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and more particularly, to an antenna for a ceiling-mounted ONU. Background Art

[0002] In recent years, the Internet and wireless devices have developed rapidly. With the diversification of application scenarios, users have higher requirements for the coverage range and installation method of wireless devices.

[0003] A ceiling-mounted ONU, that is, a ceiling-mounted Optical Network Unit, is a user-side device in a fiber access network, usually designed to be installed on the top or ceiling of a room for easy wiring and management. Due to the ceiling-mounted design, the installation of the ONU is more flexible and convenient, especially in environments such as homes or offices where hidden wiring or space saving is required. At the same time, due to being installed on the top, the ceiling-mounted ONU can effectively reduce cable exposure and improve the indoor aesthetics.

[0004] Compared with traditional ONU devices, the ceiling-mounted ONU has a wider coverage range and a more flexible and convenient installation layout. However, due to the limitations of the ceiling-mounted ONU structure, higher performance requirements can be achieved for metal antennas under the condition of a smaller volume. Summary of the Invention

[0005] The present invention provides an antenna for a ceiling-mounted ONU, which realizes high performance requirements for a metal antenna under the condition of a smaller volume.

[0006] To solve the above technical problems, the technical solution of the present invention is as follows:

[0007] The present invention provides an antenna for a ceiling-mounted ONU, including a radiator and a ground wire, wherein:

[0008] The radiator includes a first radiation surface, a second radiation surface, a third radiation surface, a fourth radiation surface, and a fifth radiation surface. The first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are coplanar. One end of the first radiation surface is connected to one end of the second radiation surface. The other end of the second radiation surface is connected to one end of the third radiation surface. The other end of the third radiation surface is respectively connected to one end of the fourth radiation surface and one end of the fifth radiation surface. The extending directions of the fourth radiation surface and the fifth radiation surface are opposite. The connection part of the second radiation surface and the third radiation surface is the feeding point;

[0009] The ground wire includes a first rectangular surface, a second rectangular surface, and a third rectangular surface. The first rectangular surface, the second rectangular surface, and the third rectangular surface form a "concave" structure. The first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are connected to the first rectangular surface.

[0010] In the above technical means, through the coplanar layout of the first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface and the fifth radiation surface, and the way they are connected to each other, the compactness of the structure is achieved. This design not only reduces the overall size of the antenna, but also improves the space utilization rate, making the antenna more suitable for the application scenarios with strict size requirements such as the ceiling-mounted ONU structure. At the same time, since the extension directions of the fourth radiation surface and the fifth radiation surface are opposite, more balanced multi-directional radiation performance is brought, and good signal coverage can be provided in multiple directions of the antenna, improving the reliability and stability of communication, and achieving high performance requirements for the metal antenna under the condition of small volume.

[0011] Further, the extension direction of the first radiation surface is perpendicular to the extension direction of the second radiation surface, the extension direction of the second radiation surface is perpendicular to the extension direction of the third radiation surface, and the extension direction of the third radiation surface is the same as the extension direction of the first radiation surface. The extension direction of the third radiation surface is perpendicular to the extension direction of the fourth radiation surface and the extension direction of the fifth radiation surface respectively.

[0012] In the above technical means, the radiation surfaces are perpendicular to each other, realizing a compact radiator structure, enabling the antenna to achieve high-efficiency radiation performance in a limited space.

[0013] Further, the first rectangular surface is perpendicular to the second rectangular surface, the second rectangle is perpendicular to the third rectangular surface, and the third rectangular surface is opposite to the first rectangular surface.

[0014] Further, the width of the first radiation surface is 2.0 mm to 3.0 mm, and the length is 4 mm to 5 mm.

[0015] Further, the width of the second radiation surface is 1 mm to 2 mm, and the length is 10 to 11 mm.

[0016] Further, the width of the third radiation surface is 1 to 2 mm, and the length is 8 to 10 mm.

[0017] Further, the width of the fourth radiation surface is 2.0 to 3 mm, and the length is 18 to 19 mm.

[0018] Further, the width of the fifth radiation surface is 1 to 2 mm, and the length is 8 to 9 mm.

[0019] Further, the long sides of the first rectangular surface, the second rectangular surface and the third rectangular surface are equal. The long sides of the first rectangular surface, the second rectangular surface and the third rectangular surface are at least greater than the length of the second radiation surface. The width of the first rectangular surface is at least greater than the sum of the lengths of the first radiation surface and the third radiation surface.

[0020] Furthermore, both the radiation and the ground wire are made of stainless steel.

[0021] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows:

[0022] The present invention provides an antenna for a ceiling-mounted ONU, which includes a radiator and a ground wire. The radiator is composed of a first radiation surface, a second radiation surface, a third radiation surface, a fourth radiation surface and a fifth radiation surface connected to each other; the ground wire includes a first rectangular surface, a second rectangular surface and a third rectangular surface to form a "concave" structure. The antenna of the present invention has a small volume, a compact size and is easy to be integrally manufactured on a PCB board or other media. At the same time, due to the compact structure and reasonable design, the manufacturing cost can be reduced and the production efficiency can be improved, which is beneficial to large-scale production and application. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of an antenna for a ceiling-mounted ONU provided by an embodiment of the present invention;

[0024] Figure 2 It is an S11 schematic diagram of an antenna for a ceiling-mounted ONU provided by an embodiment of the present invention;

[0025] Figure 3 It is a standing wave diagram of an antenna for a ceiling-mounted ONU provided by an embodiment of the present invention;

[0026] Figure 4 It is a 3D radiation diagram of an antenna for a ceiling-mounted ONU provided by an embodiment of the present invention.

[0027] In the figure, 1 is the first radiation surface, 2 is the second radiation surface, 3 is the third radiation surface, 4 is the fourth radiation surface, 5 is the fifth radiation surface, 6 is the first rectangular surface, 7 is the second rectangular surface, and 8 is the third rectangular surface. Detailed Embodiments

[0028] The drawings are only for illustrative purposes and cannot be construed as a limitation of this patent;

[0029] In order to better illustrate this embodiment, some components in the drawings are omitted, enlarged or reduced, and do not represent the size of the actual product;

[0030] For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] The technical solution of the present invention will be further described below with reference to the drawings and embodiments.

[0032] Embodiment 1

[0033] An antenna for a ceiling-mounted ONU, as Figure 1As shown, it includes a radiator and a ground wire, where:

[0034] The radiator includes a first radiation surface, a second radiation surface, a third radiation surface, a fourth radiation surface, and a fifth radiation surface. The first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are coplanar. One end of the first radiation surface is connected to one end of the second radiation surface. The other end of the second radiation surface is connected to one end of the third radiation surface. The other end of the third radiation surface is respectively connected to one end of the fourth radiation surface and one end of the fifth radiation surface. The extending directions of the fourth radiation surface and the fifth radiation surface are opposite. The connection point between the second radiation surface and the third radiation surface is the feeding point.

[0035] The ground wire includes a first rectangular surface, a second rectangular surface, and a third rectangular surface. The first rectangular surface, the second rectangular surface, and the third rectangular surface form a "concave" structure. The first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are connected to the first rectangular surface.

[0036] In this embodiment, the first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are strip-shaped radiation patches. By connecting the top edges and bottom edges of the first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface to each other, the formed connection structure realizes the compactness in structure. This design not only reduces the overall size of the antenna but also improves the space utilization rate, making the antenna more suitable for application scenarios such as ceiling-mounted ONU structures with strict size requirements. At the same time, due to the opposite extending directions of the fourth radiation surface and the fifth radiation surface, it brings more balanced multi-directional radiation performance, can provide better signal coverage in multiple directions of the antenna, improves the reliability and stability of communication, and realizes high performance requirements for the metal antenna under the condition of a small volume.

[0037] Embodiment 2

[0038] An antenna for a ceiling-mounted ONU, as Figure 1 shown, includes a radiator and a ground wire, where:

[0039] The radiator includes a first radiation surface, a second radiation surface, a third radiation surface, a fourth radiation surface, and a fifth radiation surface. The first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are coplanar. One end of the first radiation surface is connected to one end of the second radiation surface. The other end of the second radiation surface is connected to one end of the third radiation surface. The other end of the third radiation surface is respectively connected to one end of the fourth radiation surface and one end of the fifth radiation surface. The extending directions of the fourth radiation surface and the fifth radiation surface are opposite. The connection point between the second radiation surface and the third radiation surface is the feeding point.

[0040] The ground wire includes a first rectangular surface, a second rectangular surface, and a third rectangular surface. The first rectangular surface, the second rectangular surface, and the third rectangular surface form a "concave" structure. The first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are connected to the first rectangular surface.

[0041] In a further embodiment, the extending direction of the first radiation surface is perpendicular to the extending direction of the second radiation surface, the extending direction of the second radiation surface is perpendicular to the extending direction of the third radiation surface, and the extending direction of the third radiation surface is the same as the extending direction of the first radiation surface. The extending direction of the third radiation surface is perpendicular to the extending direction of the fourth radiation surface and the extending direction of the fifth radiation surface respectively.

[0042] In this embodiment, the first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are strip-shaped radiation patches. The extending direction of the radiation surface refers to the direction pointing from one short side of the radiation surface as the starting point to the other short side of the radiation surface as the ending point. Therefore, the extending direction of the first radiation surface being perpendicular to the extending direction of the second radiation surface means that the short side of the first radiation surface at the ending point of the first radiation surface is connected to and perpendicular to the short side of the second radiation surface at the starting point of the second radiation surface; the extending direction of the second radiation surface being perpendicular to the extending direction of the third radiation surface means that the short side of the second radiation surface at the ending point of the second radiation surface is connected to and perpendicular to the short side of the third radiation surface at the starting point of the third radiation surface; and the extending direction of the third radiation surface being the same as the extending direction of the first radiation surface means that the direction pointing from the starting point to the ending point of the first radiation surface is consistent with the direction pointing from the starting point to the ending point of the third radiation surface, rather than the opposite; the extending direction of the third radiation surface being perpendicular to the extending direction of the fourth radiation surface and the extending direction of the fifth radiation surface respectively means that the short side of the third radiation surface at the ending point of the third radiation surface is connected to and perpendicular to the short side of the fourth radiation surface at the starting point of the fourth radiation surface, and at the same time, the short side of the third radiation surface at the ending point of the third radiation surface is connected to and perpendicular to the short side of the fifth radiation surface at the starting point of the fifth radiation surface, and the ending points of the fourth radiation surface and the fifth radiation surface are in different directions.

[0043] In a further embodiment, the first rectangular surface is perpendicular to the second rectangular surface, the second rectangular surface is perpendicular to the third rectangular surface, and the third rectangular surface is opposite to the first rectangular surface.

[0044] In a specific embodiment, if a short side of the first rectangular surface is taken as the X-axis, a long side as the Y-axis, and a certain vertex as the origin O, and the plane where the first rectangular surface is located is the OXY plane, the positive direction of the X-axis is the direction from the vertex serving as the origin O to the other vertex of the short side serving as the X-axis, and the positive direction of the Y-axis is the direction from the vertex serving as the origin O to the other vertex of the long side serving as the Y-axis, to establish an XYZ coordinate system, then the perpendicularity between the first rectangular surface and the second rectangular surface means that a long side of the second rectangular surface is connected to a long side of the first rectangular surface, and the plane where the second rectangular surface is located is the OYZ plane; the perpendicularity between the second rectangular surface and the third rectangular surface means that the other long side of the second rectangular surface is connected to a long side of the third rectangular surface, and the plane where the third rectangular surface is located is parallel to the OXY plane; the opposition between the third rectangular surface and the first rectangular surface means that the projection of the third rectangular surface on the OXY plane is within the range of the first rectangular surface.

[0045] In this embodiment, the first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are strip-shaped radiation patches. Through the connection structure formed by connecting the top edges and bottom edges of the first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface, the compactness of the structure is achieved. This design not only reduces the overall size of the antenna but also improves the space utilization rate, making the antenna more suitable for application scenarios such as ceiling-mounted ONU structures with strict size requirements. At the same time, since the extension directions of the fourth radiation surface and the fifth radiation surface are opposite, it brings more balanced multi-directional radiation performance, and good signal coverage can be provided in multiple directions of the antenna, improving the reliability and stability of communication, and achieving high performance requirements for the metal antenna under the condition of a small volume. The ground wire in this embodiment is a "concave" structure composed of the first rectangular surface, the second rectangular surface, and the third rectangular surface, which not only provides a stable grounding path but also may play a role in reflecting or guiding electromagnetic waves, further enhancing the radiation effect of the antenna.

[0046] Embodiment 3

[0047] An antenna for a ceiling-mounted ONU, as Figure 1 shown, includes a radiator and a ground wire, where:

[0048] The radiator includes a first radiation surface, a second radiation surface, a third radiation surface, a fourth radiation surface, and a fifth radiation surface. The first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are coplanar. One end of the first radiation surface is connected to one end of the second radiation surface. The other end of the second radiation surface is connected to one end of the third radiation surface. The other end of the third radiation surface is respectively connected to one end of the fourth radiation surface and one end of the fifth radiation surface. The extension directions of the fourth radiation surface and the fifth radiation surface are opposite. The connection between the second radiation surface and the third radiation surface is the feeding point;

[0049] The ground wire includes a first rectangular surface, a second rectangular surface, and a third rectangular surface. The first rectangular surface, the second rectangular surface, and the third rectangular surface form a "concave" structure. The first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are connected to the first rectangular surface.

[0050] In a further embodiment, the extending direction of the first radiation surface is perpendicular to the extending direction of the second radiation surface, the extending direction of the second radiation surface is perpendicular to the extending direction of the third radiation surface, and the extending direction of the third radiation surface is the same as the extending direction of the first radiation surface. The extending direction of the third radiation surface is perpendicular to the extending direction of the fourth radiation surface and the extending direction of the fifth radiation surface, respectively.

[0051] In this embodiment, the first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are strip-shaped radiation patches. The extending direction of the radiation surface refers to the direction pointing from one short side of the radiation surface as the starting point to the other short side of the radiation surface as the ending point. Therefore, the extending direction of the first radiation surface being perpendicular to the extending direction of the second radiation surface means that the short side of the first radiation surface at the ending point of the first radiation surface is connected to and perpendicular to the short side of the second radiation surface at the starting point of the second radiation surface; the extending direction of the second radiation surface being perpendicular to the extending direction of the third radiation surface means that the short side of the second radiation surface at the ending point of the second radiation surface is connected to and perpendicular to the short side of the third radiation surface at the starting point of the third radiation surface; and the extending direction of the third radiation surface being the same as the extending direction of the first radiation surface means that the direction pointing from the starting point to the ending point of the first radiation surface is consistent with the direction pointing from the starting point to the ending point of the third radiation surface, rather than the opposite; the extending direction of the third radiation surface being perpendicular to the extending direction of the fourth radiation surface and the extending direction of the fifth radiation surface, respectively, means that the short side of the third radiation surface at the ending point of the third radiation surface is connected to and perpendicular to the short side of the fourth radiation surface at the starting point of the fourth radiation surface, and at the same time, the short side of the third radiation surface at the ending point of the third radiation surface is connected to and perpendicular to the short side of the fifth radiation surface at the starting point of the fifth radiation surface, and the ending points of the fourth radiation surface and the fifth radiation surface are in different directions.

[0052] In a further embodiment, the first rectangular surface is perpendicular to the second rectangular surface, the second rectangular surface is perpendicular to the third rectangular surface, and the third rectangular surface is opposite to the first rectangular surface.

[0053] In a specific embodiment, if one short side of the first rectangular surface is taken as the X-axis, one long side is taken as the Y-axis, and a certain vertex is the origin O, the plane where the first rectangular surface is located is the OXY plane, the positive direction of the X-axis is the direction from the vertex serving as the origin O to the other vertex of the short side serving as the X-axis, and the positive direction of the Y-axis is the direction from the vertex serving as the origin O to the other vertex of the long side serving as the Y-axis. When establishing the XYZ coordinate system, the perpendicularity between the first rectangular surface and the second rectangular surface means that one long side of the second rectangular surface is connected to one long side of the first rectangular surface, and the plane where the second rectangular surface is located is the OYZ plane; the perpendicularity between the second rectangular surface and the third rectangular surface means that the other long side of the second rectangular surface is connected to one long side of the third rectangular surface, and the plane where the third rectangular surface is located is parallel to the OXY plane; the opposition between the third rectangular surface and the first rectangular surface means that the projection of the third rectangular surface on the OXY plane is within the range of the first rectangular surface.

[0054] In this embodiment, the first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface are strip-shaped radiation patches. Through the connection structure formed by connecting the top edges and bottom edges of the first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface, and the fifth radiation surface, the compactness of the structure is achieved. This design not only reduces the overall size of the antenna but also improves the space utilization rate, making the antenna more suitable for application scenarios such as ceiling-mounted ONU structures with strict size requirements. At the same time, since the extension directions of the fourth radiation surface and the fifth radiation surface are opposite, it brings more balanced multi-directional radiation performance, can provide good signal coverage in multiple directions of the antenna, improves the reliability and stability of communication, and enables the metal antenna to meet high performance requirements under the condition of a small volume. The ground wire in this embodiment is a "concave" structure composed of the first rectangular surface, the second rectangular surface, and the third rectangular surface, which not only provides a stable grounding path but also may play a role in reflecting or guiding electromagnetic waves, further enhancing the radiation effect of the antenna.

[0055] In a further embodiment, the width of the first radiation surface is 2.0 mm to 3.0 mm, and the length is 4 mm to 5 mm.

[0056] In a specific embodiment, the width of the first radiation surface is 2.5 mm, and the length is 4 mm.

[0057] In a further embodiment, the width of the second radiation surface is 1 mm to 2 mm, and the length is 10 to 11 mm.

[0058] In a specific embodiment, the bottom edge of the second radiation surface is 1.3 mm, and the length is 11 mm.

[0059] In a further embodiment, the width of the third radiation surface is 1 to 2 mm, and the length is 8 to 10 mm.

[0060] In a specific embodiment, the width of the third radiation surface is 1.7 mm and the length is 9 mm.

[0061] In a further embodiment, the width of the fourth radiation surface is 2.0 - 3 mm and the length is 18 - 19 mm.

[0062] In a specific embodiment, the width of the fourth radiation surface is 2.0 mm and the length is 19 mm.

[0063] In a further embodiment, the width of the fifth radiation surface is 1 - 2 mm and the length is 8 - 9 mm.

[0064] In a specific embodiment, the width of the fifth radiation surface is 1.5 mm and the length is 9 mm.

[0065] In a further embodiment, the long sides of the first rectangular surface, the second rectangular surface and the third rectangular surface are equal, the long sides of the first rectangular surface, the second rectangular surface and the third rectangular surface are at least greater than the length of the second radiation surface, and the width of the first rectangular surface is at least greater than the sum of the lengths of the first radiation surface and the third radiation surface.

[0066] In a further embodiment, both the radiation and the ground wire are made of stainless steel.

[0067] In a specific embodiment, the operating frequency range of the antenna provided in this embodiment is 2.4 GHz - 2.5 GHz, and its S11 schematic diagram is as Figure 2 shown, the standing wave diagram is as Figure 3 shown, and the 3D radiation diagram is as Figure 4 shown.

[0068] In a further embodiment, the operating frequency band range of the antenna can be changed by changing the lengths of the radiation surfaces in an in - ceiling ONU antenna provided in this embodiment, so that it is applicable to other operating frequency band ranges. For example, the length of the radiation surface can be changed so that the operating frequency range of the antenna can be changed to 2 GHz - 2.1 GHz.

[0069] The same or similar reference numerals correspond to the same or similar components;

[0070] The terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation of this patent;

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. An antenna for a ceiling-mounted ONU, characterized in that, It includes a radiator and a ground wire, where: The radiator includes a first radiation surface, a second radiation surface, a third radiation surface, a fourth radiation surface and a fifth radiation surface. The first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface and the fifth radiation surface are coplanar. One end of the first radiation surface is connected to one end of the second radiation surface. The other end of the second radiation surface is connected to one end of the third radiation surface. The other end of the third radiation surface is respectively connected to one end of the fourth radiation surface and one end of the fifth radiation surface. The extending directions of the fourth radiation surface and the fifth radiation surface are opposite. The connection part of the second radiation surface and the third radiation surface is the feeding point. The ground wire includes a first rectangular surface, a second rectangular surface and a third rectangular surface. The first rectangular surface, the second rectangular surface and the third rectangular surface form a "concave" structure. The first radiation surface, the second radiation surface, the third radiation surface, the fourth radiation surface and the fifth radiation surface are connected to the first rectangular surface. The projection of the third rectangular surface in the vertical direction is within the first rectangular surface. The radiation surface is arranged in the direction of the first rectangular surface facing the third rectangular surface. The extending direction of the first radiation surface is perpendicular to the extending direction of the second radiation surface. The extending direction of the second radiation surface is perpendicular to the extending direction of the third radiation surface. And the extending direction of the third radiation surface is the same as the extending direction of the first radiation surface. The extending direction of the third radiation surface is respectively perpendicular to the extending direction of the fourth radiation surface and the extending direction of the fifth radiation surface. The first rectangular surface is perpendicular to the second rectangular surface. The second rectangular surface is perpendicular to the third rectangular surface. And the third rectangular surface is opposite to the first rectangular surface.

2. The antenna of the ceiling-mounted ONU according to claim 1, wherein The width of the first radiation surface is 2.0 mm to 3.0 mm, and the length is 4 mm to 5 mm.

3. The antenna of the ceiling-mounted ONU according to claim 1, wherein The width of the second radiation surface is 1 mm to 2 mm, and the length is 10 to 11 mm.

4. The antenna of the ceiling-mounted ONU according to claim 1, characterized in that The width of the third radiation surface is 1 to 2 mm, and the length is 8 to 10 mm.

5. The antenna of the ceiling-mounted ONU according to claim 1, characterized in that, The width of the fourth radiation surface is 2.0 to 3 mm, and the length is 18 to 19 mm.

6. The antenna of the ceiling-mounted ONU according to claim 1, wherein The width of the fifth radiation surface is 1 to 2 mm, and the length is 8 to 9 mm.

7. The antenna of the ceiling-mounted ONU according to claim 1, wherein The long sides of the first rectangular surface, the second rectangular surface and the third rectangular surface are equal. The long sides of the first rectangular surface, the second rectangular surface and the third rectangular surface are at least greater than the length of the second radiation surface. The width of the first rectangular surface is at least greater than the sum of the lengths of the first radiation surface and the third radiation surface.

8. The antenna of the ceiling-mounted ONU according to any one of claims 1 to 7, characterized in that, Both the radiator and the ground wire are made of stainless steel.

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