Ceiling antenna

Abstract

A ceiling antenna comprises a bearing substrate (2), a radiation unit (3) and a feed branch knot (4), and the bearing substrate (2) is a transparent substrate and is vertically arranged on a fixed base (1); the radiation unit (3) is of a latticed structure and is arranged on the bearing substrate (2); the feed branch (4) is arranged on the bearing substrate (2) and comprises a feed main circuit (41) and a plurality of feed branches (42), and the two ends of each feed branch (42) are connected with the feed main circuit (41) and the radiation unit (3) respectively. In the embodiment of the invention, the bearing substrate (2) is arranged to be a transparent substrate, and meanwhile, the radiation unit (3) with the latticed structure is arranged, so that the influence of the ceiling antenna (10) on indoor decoration design is reduced; besides, through the arrangement of the feed branch knot (4), multi-point feed on the radiation unit (3) is realized, so that the ceiling antenna (10) has a relatively large working bandwidth, and the antenna effect of the ceiling antenna (10) is ensured.

Description

Ceiling-mounted antenna Technical Field

[0001] This disclosure relates to the field of communication technology, and more specifically, to a ceiling-mounted antenna. Background Technology

[0002] A ceiling-mounted antenna is an antenna used for indoor wireless communication, typically installed on the ceiling to provide wireless signal coverage within a radius of tens of meters centered on the antenna, such as in conference rooms, hotels, and office buildings. However, the installation of ceiling-mounted antennas in these settings inevitably affects the interior design, and even if this impact is avoided, it often comes at the expense of antenna performance. Therefore, there is an urgent need for a ceiling-mounted antenna that can guarantee antenna performance without compromising interior design.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

[0004] Summary of the Invention

[0005] The purpose of this disclosure is to provide a ceiling-mounted antenna.

[0006] According to one aspect of this disclosure, a ceiling-mounted antenna is provided, comprising:

[0007] Fixed base;

[0008] A carrier substrate, which is a transparent substrate, is located on one side of the fixed base along the thickness direction. The carrier substrate is erected on the fixed base, and the plane of the carrier substrate is perpendicular to the plane of the fixed base.

[0009] The radiating unit has a grid-like structure and is disposed on the supporting substrate, located on one side of the supporting substrate along the thickness direction;

[0010] A power supply branch is disposed on the carrier substrate and includes a main power supply line and multiple power supply branches. The main power supply line is located on the side of the radiating unit near the fixed base, and the multiple power supply branches are located on the side of the main power supply line near the radiating unit and are distributed at intervals along the width direction of the carrier substrate. The two ends of each power supply branch are connected to the main power supply line and the radiating unit, respectively.

[0011] According to any of the ceiling-mounted antennas described in this disclosure, the radiating element is a radiating patch, and the fixing base includes a grounded metal layer.

[0012] According to any of the ceiling-mounted antennas described in this disclosure, the fixed base includes a fixed substrate and a grounding metal layer stacked together.

[0013] The fixed substrate is a transparent substrate, and the grounding metal layer has a grid structure and is located on the side of the fixed substrate closer to the radiating unit.

[0014] According to any of the ceiling antennas described in this disclosure, the radiating element has a dimension in the height direction of the supporting substrate that is greater than or equal to 70 mm and less than or equal to 95 mm, and the radiating element has a dimension in the width direction of the supporting substrate that is greater than or equal to 35 mm and less than or equal to 90 mm.

[0015] According to any of the ceiling-mounted antennas described in this disclosure, the ceiling-mounted antenna further includes a first metal strip;

[0016] The first metal strip has a mesh structure and is located on the side of the carrier substrate facing away from the radiating unit and on the side of the radiating unit close to the fixed base. The first metal strip is connected to the ground metal layer, and the length of the first metal strip is parallel to the width direction of the carrier substrate.

[0017] According to any of the ceiling-mounted antennas described in this disclosure, the first metal strip is located on the side of the main feed path near the fixed base.

[0018] According to any of the ceiling-mounted antennas described in this disclosure, the radiating element includes a first splicing portion and a plurality of second splicing portions distributed along the height direction of the supporting substrate;

[0019] The first splicing part is a semi-circular or semi-elliptical structure, the second splicing part is a trapezoidal structure, and multiple second splicing parts are sequentially spliced ​​on the straight side of the first splicing part, and the acute angle formed by the bottom edge and the waist edge of each second splicing part decreases in the direction away from the first splicing part.

[0020] According to any of the ceiling-mounted antennas described in this disclosure, the second splicing part that is furthest from the first splicing part among a plurality of second splicing parts is connected to the feed branch;

[0021] The length of the bottom edge of the second splice that is furthest from the first splice is greater than the length of the main power supply line.

[0022] According to any of the ceiling-mounted antennas described in this disclosure, the radiating element is a microstrip line, and the ceiling-mounted antenna further includes a grounded metal layer;

[0023] The grounding metal layer is located on the side of the supporting substrate facing away from the radiating unit, and the grounding metal layer has a grid-like structure.

[0024] According to any of the ceiling-mounted antennas described in this disclosure, the radiating element has multiple pairs of slits;

[0025] The gap extends to the edge of the radiating unit facing the fixed base. Multiple pairs of gaps correspond one-to-one with multiple power supply branches, and the portion between each pair of gaps on the radiating unit is connected to a corresponding power supply branch.

[0026] According to any of the ceiling-mounted antennas described in this disclosure, the radiating element further has a through-hole.

[0027] According to any of the ceiling-mounted antennas described in this disclosure, the width of the slit is greater than or equal to 0.1 mm and less than or equal to 1 mm, and the length of the slit is greater than or equal to 5 mm and less than or equal to 10 mm.

[0028] According to any of the ceiling-mounted antennas described in this disclosure, the ceiling-mounted antenna further includes two sets of second metal strips;

[0029] Both sets of the second metal strips are located on the side of the carrier substrate closer to the radiating unit, and are distributed on both sides of the radiating unit along the width direction of the carrier substrate;

[0030] Each group of second metal strips includes a plurality of second metal strips spaced apart along the height direction of the carrier substrate, and the length direction of each second metal strip is parallel to the height direction of the carrier substrate.

[0031] According to any of the ceiling-mounted antennas described in this disclosure, the length of the second metal strip is greater than or equal to 18 mm and less than or equal to 24 mm, and the width of the second metal strip is greater than or equal to 1.5 mm and less than or equal to 2.2 mm.

[0032] According to any of the ceiling antennas described in this disclosure, in the width direction of the supporting substrate, the minimum distance between the second metal strip and the radiating element is greater than or equal to 5 mm and less than or equal to 15 mm.

[0033] According to any of the ceiling-mounted antennas described in this disclosure, the ceiling-mounted antenna further includes a resonant stub;

[0034] The two resonant stubs are distributed on both sides of the radiating unit along the width direction of the supporting substrate, and the two resonant stubs are respectively connected to the two ends of the main feed circuit.

[0035] According to any of the ceiling-mounted antennas described in this disclosure, the length of the resonant stub is greater than or equal to 30 mm and less than or equal to 50 mm, and the width of the resonant stub is greater than or equal to 1 mm and less than or equal to 3 mm.

[0036] According to any of the ceiling-mounted antennas described in this disclosure, the resonant stub includes a winding segment.

[0037] According to any of the ceiling-mounted antennas described in this disclosure, a resonant block is connected to the end of the resonant stub away from the main feed path, the dimension of the resonant block in the width direction of the resonant stub is greater than the width of the resonant stub, and the resonant block has a mesh structure.

[0038] According to any of the ceiling-mounted antennas described in this disclosure, the resonant stubs are linearly distributed and form an angle with the fixed base greater than or equal to 45 degrees and less than or equal to 60 degrees.

[0039] According to any of the ceiling antennas described in this disclosure, the ceiling antenna includes a carrier film, the carrier film being a transparent thin film, the carrier film being located on one side of the carrier substrate along the thickness direction, and the radiating element being located on the surface of the carrier film facing away from the carrier substrate.

[0040] According to any of the ceiling antennas described in this disclosure, the ceiling antenna further includes a protective film, which is a transparent thin film located on one side of the supporting substrate along the thickness direction and covers the radiating element.

[0041] According to any of the ceiling-mounted antennas described in this disclosure, the ceiling-mounted antenna further includes a fixing clamp;

[0042] The fixing clamp has a first fixing arm and a second fixing arm that are vertically connected. The first fixing arm is fixedly connected to the fixing base, and the second fixing arm is fixedly connected to the bearing substrate.

[0043] According to any of the ceiling-mounted antennas described in this disclosure, the fixing clamp is a transparent structure.

[0044] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0045] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0046] Figure 1 is a schematic diagram of the axial structure of a ceiling-mounted antenna provided in an embodiment of this disclosure.

[0047] Figure 2 is a schematic diagram of the front view structure of a ceiling-mounted antenna provided in an embodiment of this disclosure.

[0048] Figure 3 is a side view of a ceiling-mounted antenna according to an embodiment of this disclosure.

[0049] Figure 4 is a schematic diagram of the front view structure of another ceiling-mounted antenna provided in this embodiment of the present disclosure.

[0050] Figure 5 is a schematic diagram of the front view structure of another ceiling-mounted antenna provided in this embodiment.

[0051] Figure 6 is a schematic diagram of the front view structure of another ceiling-mounted antenna provided in this embodiment.

[0052] Figure 7 is a rear view structural diagram of a ceiling-mounted antenna provided in an embodiment of this disclosure.

[0053] Figure 8 is a schematic diagram of the front view structure of another ceiling-mounted antenna provided in this embodiment.

[0054] Figure 9 is a schematic diagram of the front view structure of another ceiling-mounted antenna provided in this embodiment.

[0055] Figure 10 is a front view structural diagram of another ceiling-mounted antenna provided in this embodiment of the present disclosure.

[0056] Figure 11 shows the standing wave simulation curve of a ceiling-mounted antenna provided in this embodiment of the present disclosure.

[0057] Figure 12 shows the peak gain simulation curve of a ceiling-mounted antenna provided in this embodiment of the present disclosure.

[0058] Figure 13 is a simulated radiation pattern curve of a ceiling-mounted antenna provided in an embodiment of this disclosure.

[0059] Figure 14 shows the standing wave simulation curve of another ceiling antenna provided in this embodiment.

[0060] Figure 15 shows the peak gain simulation curve of another ceiling-mounted antenna provided in this embodiment of the present disclosure.

[0061] Figure 16 shows a simulated radiation pattern curve of another ceiling-mounted antenna provided in this embodiment of the present disclosure.

[0062] Figure 17 shows the standing wave simulation curve of another ceiling-mounted antenna provided in this embodiment.

[0063] Figure 18 shows the peak gain simulation curve of another ceiling-mounted antenna provided in this embodiment.

[0064] Figure 19 shows a simulated radiation pattern curve of another ceiling-mounted antenna provided in this embodiment.

[0065] Figure 20 shows the standing wave simulation curve of another ceiling-mounted antenna provided in this embodiment.

[0066] Figure 21 shows the peak gain simulation curve of another ceiling-mounted antenna provided in this embodiment.

[0067] Figure 22 shows a simulated radiation pattern curve of another ceiling-mounted antenna provided in this embodiment.

[0068] Figure 23 shows the standing wave simulation curve of another ceiling-mounted antenna provided in this embodiment.

[0069] Figure 24 shows the peak gain simulation curve of another ceiling-mounted antenna provided in this embodiment of the present disclosure.

[0070] Figure 25 shows a simulated radiation pattern curve of another ceiling-mounted antenna provided in this embodiment of the present disclosure.

[0071] Figure label:

[0072] 10. Ceiling-mounted antenna;

[0073] 1. Fixed base; 2. Support substrate; 3. Radiation unit; 4. Power supply branch; 5. Support film; 6. Protective film; 7. Power supply wire; 8. Fixture;

[0074] 11. Fixed substrate; 12. Grounding metal layer;

[0075] 31. First metal strip; 32. Second metal strip; 33. Gap; 34. Resonant stub; 35. Resonant block; 36. Through hole;

[0076] 41. Main power supply line; 42. Branch power supply line. Detailed Implementation

[0077] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0078] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down". When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0079] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0080] Figure 1 illustrates an axial side view of a ceiling antenna 10 provided in an embodiment of the present disclosure, and Figure 2 illustrates a front view of a ceiling antenna 10 provided in an embodiment of the present disclosure. As shown in Figures 1 and 2, the ceiling-mounted antenna 10 includes: a fixed base 1, a supporting substrate 2, a radiating element 3, and a feed branch 4. The supporting substrate 2 is a transparent substrate, located on one side of the fixed base 1 along the thickness direction, and is erected on the fixed base 1. The plane of the supporting substrate 2 is perpendicular to the plane of the fixed base 1. The radiating element 3 is a mesh structure, disposed on the supporting substrate 2, and located on one side of the supporting substrate 2 along the thickness direction. The feed branch 4 is disposed on the supporting substrate 2 and includes a main feed path 41 and multiple feed branches 42. The main feed path 41 is located on the side of the radiating element 3 near the fixed base 1, and the multiple feed branches 42 are located on the side of the main feed path 41 near the radiating element 3, and are distributed at intervals along the width direction W of the supporting substrate 2. The two ends of each feed branch 42 are connected to the main feed path 41 and the radiating element 3, respectively.

[0081] In this embodiment, the carrier substrate 2 is set as a transparent substrate, and a radiating unit 3 with a grid structure is set on the carrier substrate 2, thereby achieving a high transparency design for the carrier substrate 2 and the radiating unit 3, reducing the impact of the ceiling antenna 10 on the interior decoration design; in addition, by setting the feeding branch 4 on the carrier substrate 2, multi-point feeding on the radiating unit 3 can be achieved, so that the ceiling antenna 10 has a large operating bandwidth based on the resonance between multiple feeding points on the radiating unit 3, thereby ensuring the antenna effect of the ceiling antenna 10.

[0082] The feed branch 4 includes a main feed path 41, which can be either a straight line or an arc. When the main feed path 41 is a straight line, its length can be parallel to the width direction W of the supporting substrate 2. Furthermore, by feeding electromagnetic signals to the radiating element 3 through the multiple feed branches 42 included in the feed branch 4, the ceiling-mounted antenna 10 can achieve superior antenna performance in the 1800MHz band (1710–1850MHz), the F band (1885MHz–1915MHz), the A band (2010MHz–2025MHz), the E band (2300MHz–2400MHz), the WLAN band (2400MHz–2483.5MHz), and the D band (2515MHz–2675MHz). Of course, the antenna performance, such as the operating bandwidth, of the ceiling-mounted antenna 10 can be further optimized through structural improvements.

[0083] The mounting base 1 has a fixing member on the side facing away from the supporting substrate 2, which allows the mounting base 1 to be fixed to the indoor wall, thus enabling the ceiling antenna 10 to be installed indoors. For example, as shown in Figure 1, a fixing bolt is provided on the side of the mounting base 1 facing away from the supporting substrate 2. In this case, the ceiling antenna 10 can be fixed to the wall by screwing the fixing bolt, thus enabling indoor installation. The fixing bolt on the mounting base 1 can consist of a stud and a base plate. One end of the stud is welded to the base plate, and the base plate is attached to the side of the mounting base 1 facing away from the supporting substrate 2 and fixed to the mounting base 1 by a locking screw.

[0084] The carrier substrate 2 can be a rigid transparent substrate such as a glass substrate, plastic substrate, or resin substrate; the carrier substrate 2 can be a single-layer structure or a multi-layer structure, and this embodiment does not limit this. In addition, the carrier substrate 2 can be erected on the fixed base 1 by means of bonding, welding, or fixing with fasteners. For the method of fixing with fasteners, as shown in Figure 1 or Figure 2, the ceiling antenna 10 also includes a fixing clamp 8, which has a first fixing arm and a second fixing arm that are vertically connected. The first fixing arm is fixedly connected to the fixed base 1, and the second fixing arm is fixedly connected to the carrier substrate 2.

[0085] The fixing clamp 8 can be located on the side of the carrier substrate 2 facing away from the radiating unit 3, or on the side of the carrier substrate 2 facing the radiating unit 3. When the fixing clamp 8 is located on the side facing away from the radiating unit 3, it is easier to avoid interference between the fixing clamp 8 and the feed line 7, feed branch 4, etc.

[0086] It should be noted that, in order to further consider the high transparency of the ceiling antenna 10, transparent adhesive can be used to bond and fix the carrier substrate 2 to the fixed base 1, or a transparent fastener can be used to fix the carrier substrate 2 to the fixed base 1 (for example, the fixing clamp 8 is a transparent structure).

[0087] In some embodiments, the ceiling antenna 10 further includes an antenna cover, which is fixedly connected to the fixed base 1 and forms a receiving cavity with the fixed base 1, and the carrier substrate 2 is located in the receiving cavity.

[0088] Thus, the radome protects the radiating element 3 and the feed branch 4, extending the lifespan of the ceiling-mounted antenna 10. Furthermore, the radome is made transparent to avoid affecting the high transparency of the ceiling-mounted antenna 10, thereby minimizing its impact on interior design.

[0089] Of course, in this embodiment of the present disclosure, the ceiling antenna 10 may also be without an antenna cover in order to reduce the obstruction of electromagnetic signals by the antenna cover and reduce the loss during electromagnetic signal radiation, thereby ensuring the antenna effect of the ceiling antenna 10.

[0090] In this embodiment, the radiating element 3 has a mesh structure and can be fabricated using Metal Mesh technology to ensure high transparency of the radiating element 3. Furthermore, other structural components of the mesh structure involved in this disclosure (such as the grounding metal layer 12, the first metal strip 31, the second metal strip 32, the resonant stub 34, etc.) can also be fabricated using Metal Mesh technology to ensure high transparency of other structural components.

[0091] In some embodiments, as shown in FIG3, the ceiling antenna 10 includes a carrier film 5, which is a transparent thin film. The carrier film 5 is located on one side of the carrier substrate 2 along the thickness direction, and the radiating unit 3 is located on the surface of the carrier film 5 facing away from the carrier substrate 2.

[0092] In this way, the radiating unit 3 with a grid structure can be prefabricated on the carrier film 5, and then the carrier film 5 can be fixed on the carrier substrate 2, which simplifies the fabrication of the radiating unit 3 on the carrier substrate 2, improves the flatness of the radiating unit 3, ensures the reliability of the radiating unit 3, and thus ensures the antenna effect of the ceiling antenna 10.

[0093] The carrier film 5 can be a resin film, plastic film, or any other material that is transparent.

[0094] Optionally, the radiating element 3 and the feed stub 4 can be fabricated simultaneously on the carrier film 5 to further simplify the fabrication process of the ceiling antenna 10, while ensuring the reliability of the feed stub 4 to ensure the stability of the connection between the feed line 7 and the radiating element 3 through the feed stub 4.

[0095] It should be noted that after the radiation unit 3 is fabricated on the carrier film 5, in addition to bonding and fixing the surface of the carrier film 5 facing away from the radiation unit 3 to the carrier substrate 2, the surface of the carrier film 5 facing the radiation unit 3 can also be bonded and fixed to the carrier substrate 2. In this case, the carrier film 5 not only facilitates the fabrication of the radiation unit 3, but also covers the radiation unit 3, thereby protecting the radiation unit.

[0096] In some embodiments, as shown in FIG3, the ceiling antenna 10 further includes a protective film 6, which is a transparent thin film located on one side of the substrate 2 along the thickness direction and covers the radiating element 3.

[0097] Thus, the radiation unit 3 can be protected by the protective film 6, preventing it from being affected by the external environment and extending its service life. The material of the protective film 6 can refer to the carrier film 5 described above, and will not be repeated here.

[0098] Optionally, the protective film 6 can cover both the radiating element 3 and the feed branch 4 simultaneously, thereby protecting both the radiating element 3 and the feed branch 4 and further extending the service life of the ceiling-mounted antenna 10.

[0099] In this embodiment of the disclosure, the radiation unit 3 is used to connect to the feed line 7 through the feed branch 4 to realize the feeding of electromagnetic signals, and then to radiate to the external environment through the radiation unit 3.

[0100] The feeder line 7 can be set on the side of the fixed base 1 close to the radiating unit 3, or on the side of the fixed base 1 away from the radiating unit 3, and the feeder line 7 and the main feeder line 41 of the feeder branch 4 can be connected by welding.

[0101] When the feeder cable 7 is installed on the side of the fixed base 1 near the radiating unit 3, the feeder cable 7 is fixed to the surface of the fixed base 1 near the radiating unit 3, and in this case, the feeder cable 7 is an exposed cable. In this case, to avoid the feeder cable 7 affecting the interior decoration design, a color-matched film can be used to wrap the feeder cable 7 so that the appearance color of the feeder cable 7 is close to the color of the interior wall, thereby achieving the effect of hiding the feeder cable 7. When the feeder cable 7 is installed on the side of the fixed base 1 away from the radiating unit 3, the fixed base 1 has a through hole so that the feeder cable 7 can pass through the through hole and connect to the main feeder circuit 41 of the feeder branch 4; in this way, by hiding the feeder cable 7, the feeder cable 7 can be avoided from affecting the interior decoration design.

[0102] In this embodiment, the radiating element 3 can be a radiating patch or a microstrip line, etc., and can be set according to the actual requirements of the antenna effect to be achieved by the ceiling antenna 10.

[0103] When the radiating element 3 is a microstrip line, the ceiling antenna 10 can constitute a microstrip antenna. In this case, the ceiling antenna 10 also includes a ground metal layer 12, which is located on the side of the supporting substrate 2 facing away from the radiating element 3, and the ground metal layer 12 has a mesh structure. Thus, the combination of the microstrip line and the ground metal layer 12 ensures the microstrip antenna effect of the ceiling antenna 10; at the same time, the mesh structure of the ground metal layer 12 ensures the high transparency of the ground metal layer 12, thereby ensuring the high transparency of the ceiling antenna 10.

[0104] When the radiating element 3 is a radiating patch, the ceiling antenna 10 can constitute a patch antenna; in this case, as shown in Figure 2 or Figure 3, the fixed base 1 includes a grounding metal layer 12. Thus, the fixed base 1 is provided with a grounding metal layer 12 to ensure the patch antenna effect of the ceiling antenna 10.

[0105] Optionally, the radiating unit includes a first splicing portion and a plurality of second splicing portions distributed along the height direction H of the supporting substrate 2; the first splicing portion is a semi-circular or semi-elliptical structure, the second splicing portion is a trapezoidal structure, and the plurality of second splicing portions are sequentially spliced ​​on the straight side of the first splicing portion, and the acute angle formed by the bottom edge and the waist edge of each second splicing portion decreases in the direction away from the first splicing portion.

[0106] Among the multiple second splicing parts, the length of the bottom edge of the second splicing part closest to the first splicing part is equal to the length of the straight edge of the first splicing part, and the lengths of the two adjacent bottom edges of two adjacent second splicing parts are equal, so as to ensure the aesthetics of the first splicing part after splicing with multiple second splicing parts.

[0107] The two sides of the second splicing part can be straight or curved. When the sides of the second splicing part are curved, it facilitates a smooth transition between the sides of two adjacent second splicing parts, thereby optimizing the current distribution on the radiating unit. For example, the outer contour of the radiating unit 3 formed by splicing the first splicing part and multiple second splicing parts is a shape similar to a "light bulb" cross-section as shown in Figure 2, or a shape similar to a "peach" cross-section as shown in Figure 4, or an upper cone shape or a lower cone shape, etc. The embodiments disclosed herein are not limited to this.

[0108] Specifically, for the radiating unit 3, which includes a first splicing section and multiple second splicing sections, the first splicing section can be connected to the feed branch 42 of the feed branch 4, or the second splicing section farthest from the first splicing section can be connected to the feed branch 42 of the feed branch 4. When the second splicing section farthest from the first splicing section is connected to the feed branch 42, the length of the bottom edge of the second splicing section farthest from the first splicing section near the main feed line 41 is greater than the length of the main feed line 41, thereby ensuring the connection between the multiple feed branches 42 and the second splicing section farthest from the first splicing section.

[0109] Optionally, the radiating element 3 can be a symmetrical structure, and the line of symmetry of the radiating element 3 is parallel to the height direction H of the supporting substrate 2. In this way, when radiating electromagnetic signals through the radiating element 3, it is easy to ensure the symmetry of the radiation pattern of the ceiling antenna 10, that is, to ensure the uniformity of the electromagnetic signal within the coverage area of ​​the ceiling antenna 10.

[0110] Optionally, the dimension of the radiating unit 3 in the height direction (i.e., the height direction H of the supporting substrate 2) is greater than or equal to 70 mm and less than or equal to 95 mm, and the dimension of the radiating unit 3 in the width direction (i.e., the width direction W of the supporting substrate 2) is greater than or equal to 35 mm and less than or equal to 90 mm. For example, the dimension of the radiating unit 3 in the height direction is 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, 95 mm, etc., and the dimension in the width direction is 35 mm, 45 mm, 55 mm, 65 mm, 75 mm, 85 mm, 90 mm, etc.; for example, the dimensions of the radiating unit 3 in the height direction and the width direction are 70 mm and 35 mm, 75 mm and 45 mm, 80 mm and 55 mm, 85 mm and 65 mm, 90 mm and 75 mm, 95 mm and 90 mm, etc.

[0111] Optionally, in the case where the fixed base 1 includes a grounding metal layer 12, as shown in FIG2 or FIG3, the fixed base 1 includes a fixed substrate 11 and a grounding metal layer 12 stacked together.

[0112] The fixed substrate 11 is a transparent substrate, and the grounding metal layer 12 has a grid structure and is located on the side of the fixed substrate 11 closest to the radiating unit 3. In this way, by setting the fixed substrate 11 to be a transparent substrate and setting the metal grounding layer to have a grid structure, the high transparency of the fixed base 1 is achieved, thereby realizing the high transparency design of the overall structure of the ceiling antenna 10 and avoiding the ceiling antenna 10 from affecting the interior decoration design.

[0113] Alternatively, the grounding metal layer 12 can be located on the side of the fixed base 1 facing away from the carrier substrate 2, and the surface of the fixed substrate 11 facing the carrier substrate 2 can be wrapped with a color matching film. By setting the color matching film, the color of the surface of the fixed substrate 11 facing the carrier substrate 2 can be close to the color of the interior wall, thereby achieving the effect of hiding the fixed substrate 11 and avoiding affecting the interior decoration design.

[0114] Furthermore, a transparent carrier film 5 can be provided between the fixed substrate 11 and the ground metal layer 12, so that the grid-structured ground metal layer 12 can be pre-set on the carrier film 5, thereby simplifying the manufacturing process of the ground metal layer 12 on the fixed substrate 11, improving the flatness of the ground metal layer 12, and ensuring the reliability of the ground metal layer 12. In addition, a protective film 6 can be provided on the side of the ground metal layer 12 facing away from the fixed substrate 11, so as to cover the ground metal layer 12 through the protective film 6, thereby protecting the ground metal layer 12 and extending the service life of the ceiling antenna 10.

[0115] In some embodiments, as shown in FIG5, the ceiling antenna 10 further includes two sets of second metal strips 32; both sets of second metal strips 32 are located on the side of the carrier substrate 2 near the radiating unit 3, and are distributed on both sides of the radiating unit 3 along the width direction W of the carrier substrate 2; each set of second metal strips 32 includes a plurality of second metal strips 32 spaced apart along the height direction H of the carrier substrate 2, and the length direction of each second metal strip 32 is parallel to the height direction H of the carrier substrate 2.

[0116] In this way, by setting two sets of second metal strips 32, coupling with the radiating unit 3 can be achieved, thereby changing the current distribution on the radiating unit 3, adjusting the radiation pattern of the ceiling antenna 10, reducing the non-circularity of the ceiling antenna 10, and improving the coverage effect of the ceiling antenna 10.

[0117] The radiating element 3 can be a radiating patch or a microstrip line, etc., and the second metal strip 32 can be a mesh structure to avoid affecting the high transparency of the ceiling-mounted antenna 10. Furthermore, in conjunction with the aforementioned carrier film 5 and protective film 6, the radiating element 3, the feed branch 4, and the second metal strip 32 can be fabricated in the same layer on the carrier film 5 to simplify the manufacturing process while ensuring the reliability of the radiating element 3, the feed branch 4, and the second metal strip 32; or the protective film 6 can simultaneously cover the radiating element 3, the feed branch 4, and the second metal strip 32 to protect them and extend the service life of the ceiling-mounted antenna 10.

[0118] Optionally, the length of the second metal strip 32 is greater than or equal to 18 mm and less than or equal to 24 mm, and the width of the second metal strip 32 is greater than or equal to 1.5 mm and less than or equal to 2.2 mm. In this way, by setting the dimensions of the second metal strip 32, the influence area of ​​the second metal strip 32 on the current distribution on the radiating element 3 is ensured, thereby effectively ensuring the roundness of the radiation pattern of the ceiling-mounted antenna 10.

[0119] For example, the length of the second metal strip 32 is 18 mm, 20 mm, 22 mm, 24 mm, etc., and the width of the second metal strip 32 is 1.5 mm, 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, etc. For example, the length and width of the second metal strip 32 are 18 mm and 1.5 mm, 20 mm and 1.8 mm, 22 mm and 2.0 mm, 24 mm and 2.2 mm, etc.

[0120] Optionally, in the width direction W of the carrier substrate 2, the minimum distance between the second metal strip 32 and the radiating element 3 is greater than or equal to 5 mm and less than or equal to 15 mm. Thus, by setting the gap between the second metal strip 32 and the radiating element 3, the coupling effect between the second metal strip 32 and the radiating element 3 is ensured, thereby effectively adjusting the current distribution on the radiating element 3 to effectively ensure the roundness of the radiation pattern of the ceiling-mounted antenna 10.

[0121] For example, in the width direction W of the substrate 2, the minimum spacing between the second metal strip 32 and the radiating unit 3 is 5 mm, 7 mm, 9 mm, 11 mm, 13 mm, 15 mm, etc.

[0122] In some embodiments, as shown in FIG4 or FIG6, the radiating unit 3 has multiple pairs of slots 33; the slots 33 extend to the edge of the radiating unit 3 facing the fixed base 1, the multiple pairs of slots 33 correspond one-to-one with multiple power supply branches 42, and the portion between each pair of slots 33 is connected to a corresponding power supply branch 42.

[0123] In this way, by setting multiple pairs of slots 33, impedance matching between the feed branch 42 and the radiating element 3 is achieved, so as to effectively reduce the standing wave ratio of the ceiling antenna 10, while ensuring that the ceiling antenna 10 has good gain and good circularity of radiation pattern.

[0124] The radiating unit 3 can be a radiating patch or a microstrip line, etc. The slot 33 can extend along a direction parallel to the length of the feed branch 42 included in the feed stub 4 to the edge of the radiating unit 3 near the fixed base 1, so that multiple pairs of slots 33 provided on the radiating unit 3 form multiple feed terminals near the feed stub 4, thereby connecting the multiple feed terminals to the multiple feed branches 42 one by one. When the length direction of the feed branch 42 is parallel to the height direction H of the carrier substrate 2, the slot 33 extends along the height direction H of the carrier substrate 2 to the edge of the radiating unit 3 near the fixed base 1.

[0125] In this pair of slits 33, the lengths and widths of the two slits 33 can be different or identical. Furthermore, the width of the slit 33 is greater than or equal to 0.1 mm and less than or equal to 1 mm, and the length of the slit 33 is greater than or equal to 5 mm and less than or equal to 10 mm. For example, the widths of the slits 33 are 0.1 mm, 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, and 1.0 mm, and the lengths of the slits 33 are 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, and 10 mm.

[0126] Optionally, as shown in Figure 4, the radiating element 3 also has a through hole 36, which can be used to further adjust the impedance matching between the radiating element 3 and the feed branch 42, so as to effectively reduce the standing wave ratio of the ceiling antenna 10, while ensuring that the ceiling antenna 10 has good gain and good circularity of radiation pattern.

[0127] Among them, the through hole 36 of the radiation unit 3 can be a circular hole, an elliptical hole, a triangular hole, a rectangular hole, a rhomboid hole, etc.

[0128] In some embodiments, as shown in FIG7, the ceiling antenna 10 further includes a first metal strip 31. The first metal strip 31 has a mesh structure and is located on the side of the carrier substrate 2 facing away from the radiating unit 3, and on the side of the radiating unit 3 close to the fixed base 1. The first metal strip 31 is connected to the ground metal layer 12, and the length of the first metal strip 31 is parallel to the width direction W of the carrier substrate 2.

[0129] Thus, by grounding the first metal strip 31 and coupling it with the main power supply 41, while avoiding coupling between the first metal strip and the radiating element 3, the standing wave effect of the ceiling antenna 10 is optimized, the operating bandwidth is increased, and the gain is improved, thereby further enhancing the antenna performance of the ceiling antenna 10. In addition, setting the first metal strip 31 to a mesh structure also ensures the high transparency of the ceiling antenna 10, avoiding any impact on the interior decoration design.

[0130] The radiating element 3 can be a radiating patch to avoid interference between the first metal strip 31 on the side of the carrier substrate 2 away from the radiating element 3 and the ground metal layer 12 when the radiating element 3 is a microstrip line. The first metal strip 31 can be a mesh structure to avoid affecting the high transparency of the ceiling antenna 10. The first metal strip 31 and the ground metal layer 12 included in the fixed base 1 can be connected by welding (in this case, the ground metal layer 12 is located on the side of the fixed substrate 11 facing the carrier substrate 2). The length of the first metal strip 31 can be greater than the width of the radiating element 3 to ensure the coupling resonance effect between the first metal strip 31 and the main feed path 41. For example, the length of the first metal strip 31 is equal to the dimension of the carrier substrate 2 along the width direction W of the carrier substrate 2.

[0131] Optionally, as shown in Figure 7, the first metal strip 31 is located on the side of the main feed path 41 included in the feed branch 4 that is close to the fixed base 1. That is, in the thickness direction of the supporting substrate 2, the orthographic projection of the first metal strip 31 and the orthographic projection of the main feed path 41 do not overlap. In this way, the coupling resonance effect between the first metal strip 31 and the main feed path 41 can be further improved, thereby further improving the antenna performance of the ceiling-mounted antenna 10.

[0132] In some embodiments, as shown in FIG8, the ceiling antenna 10 further includes resonant stubs 34; two resonant stubs 34 are distributed on both sides of the radiating element 3 along the width direction W of the supporting substrate 2, and the two resonant stubs 34 are respectively connected to the two ends of the main feed path 41.

[0133] Thus, the operating bandwidth of the ceiling antenna 10 can be increased and its antenna performance improved through the resonance between the resonant stub 34 and the radiating element 3. For example, by adding the resonant stub 34, the ceiling antenna 10 can have a better standing wave ratio in the frequency band of 1600 to 1710 MHz.

[0134] The radiating element 3 can be a radiating patch or a microstrip line, etc., and the resonant stub 34 can be a mesh structure to avoid affecting the high transparency of the ceiling-mounted antenna 10. Furthermore, in conjunction with the aforementioned carrier film 5 and protective film 6, the radiating element 3, the feeding stub 4, and the resonant stub 34 can be fabricated in the same layer on the carrier film 5 to simplify the manufacturing process while ensuring the reliability of the radiating element 3, the feeding stub 4, and the resonant stub 34; or the protective film 6 can simultaneously cover the radiating element 3, the feeding stub 4, and the resonant stub 34 to protect them and extend the service life of the ceiling-mounted antenna 10.

[0135] Optionally, the spacing between the resonant stub 34 and the radiating element 3 can be greater than or equal to 1 mm and less than or equal to 10 mm to ensure the resonance effect between the resonant stub 34 and the radiating element 3.

[0136] The resonant stub 34 can be arranged parallel to the edge of the radiating unit 3, that is, the distance between the resonant stub 34 and the radiating unit 3 in the width direction W of the supporting substrate 2 is constant; of course, the resonant stub 34 can also be distributed in a straight line, in which case the distance between the resonant stub 34 and the radiating unit 3 in the width direction W of the supporting substrate 2 gradually changes in the direction away from the fixed base 1.

[0137] When the resonant stub 34 is distributed in a straight line, the angle formed between the resonant stub 34 and the fixed base 1 is greater than or equal to 45 degrees and less than or equal to 60 degrees. For example, the angle formed between the resonant stub 34 and the fixed base 1 is 45 degrees, 48 ​​degrees, 51 degrees, 54 degrees, 57 degrees, 60 degrees, etc.

[0138] Furthermore, when the radiating element 3 is a radiating patch, and its outer contour approximates the cross-sectional shape of a "light bulb," the outer contour of the radiating element 3 includes a hypotenuse near the resonant stub 34. The angle formed by the hypotenuse and the straight line containing the resonant stub 34 is greater than or equal to 5 degrees and less than or equal to 10 degrees. This facilitates ensuring the spacing between the resonant stub 34 and the radiating element 3, thereby guaranteeing the resonance effect between them. For example, the angle formed by the hypotenuse of the radiating element 3 and the straight line containing the resonant stub 34 is 5 degrees, 6 degrees, 7 degrees, 8 degrees, 9 degrees, 10 degrees, etc.

[0139] Optionally, the length of the resonant stub 34 is greater than or equal to 30 mm and less than or equal to 50 mm, and the width of the resonant stub 34 is greater than or equal to 1 mm and less than or equal to 3 mm. This ensures that the resonant stub 34 and the radiating element 3 have a large resonant region, thereby ensuring the resonant effect of the resonant stub 34 and the radiating element 3. For example, the length of the resonant stub 34 is 30 mm, 34 mm, 38 mm, 42 mm, 46 mm, 50 mm, etc., and the width of the resonant stub 34 is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc.

[0140] Optionally, the resonant stub 34 can be a linear structure, or as shown in Figure 8, the resonant stub 34 includes a winding segment, so that by setting the winding segment, more resonant points are formed between the resonant stub 34 and the radiating element 3, thereby further improving the operating bandwidth of the ceiling antenna 10.

[0141] The winding segment on the resonant stub 34 can be a sawtooth winding, a wavy winding, or a right-angle bend winding, etc. This embodiment does not limit the specific type of winding, as long as the resonance effect between the resonant stub 34 and the radiating unit 3 can be guaranteed.

[0142] Optionally, as shown in Figure 8, a resonant block 35 is connected to the end of the resonant stub 34 away from the main feed path 41. The dimension of the resonant block 35 in the width direction of the resonant stub 34 is larger than the width of the resonant stub 34. In this way, by setting the resonant block 35, the coupling between the resonant block 35 and the radiating element 3 is realized, thereby optimizing the standing wave ratio of the ceiling-mounted antenna 10 and improving the antenna performance of the ceiling-mounted antenna 10.

[0143] The resonant block 35 has a mesh structure to ensure the high transparency of the ceiling-mounted antenna 10. The resonant block 35 can be a rectangular structure, and the width of the resonant block 35 is greater than the width of the resonant stub 34. When the resonant block 35 is connected to the end of the resonant stub 34, the edge of the resonant block 35 is flush with the side of the resonant stub 34 away from the radiating element 3, so that the resonant block 35 can be closer to the radiating element 3.

[0144] It should be noted that, regarding the first metal strip 31, second metal strip 32, slot 33, and resonant stub 34 explained in the above four embodiments, the carrier substrate 2 of the ceiling antenna 10 includes, in addition to having one of the first metal strip 31, second metal strip 32, slot 33, and resonant stub 34 separately provided, for example, the ceiling antenna 10 shown in Figure 7 has only the first metal strip 31 provided on the carrier substrate 2, the ceiling antenna 10 shown in Figure 5 has only the second metal strip 32 provided on the carrier substrate 2, and the ceiling antenna 10 shown in Figure 6 only has the radiating element 3 provided. There are multiple pairs of slots 33. For example, the ceiling antenna 10 shown in Figure 8 has only resonant stubs 34 on the carrier substrate 2. Alternatively, any combination of the first metal strip 31, the second metal strip 32, the slots 33, and the resonant stubs 34 can be provided. For example, the ceiling antenna 10 shown in Figure 9 has multiple pairs of slots 33 on the radiating element 3 that correspond one-to-one with multiple feed branches 42, and the carrier substrate 2 has the first metal strip 31 on the side facing away from the radiating element 3. Or, the ceiling antenna 10 shown in Figure 10 has the second metal strip 32 and the resonant stubs 34 on the carrier substrate 2 at the same time.

[0145] Example 1, taking the ceiling antenna 10 shown in Figure 2 as an example, wherein the radiating element 3 is a radiating patch with a profile approximately resembling a "light bulb" cross-section, and the dimensions in the height direction (height direction H of the supporting substrate 2) and the width direction (width direction W of the supporting substrate 2) are 90 mm and 85 mm respectively, the ceiling antenna 10 is simulated to obtain the standing wave simulation curve shown in Figure 11, the peak gain simulation curve shown in Figure 12, and the radiation pattern simulation curve shown in Figure 13.

[0146] Referring to Figure 11, the VSWR of the ceiling-mounted antenna 10 is less than 1.6 in the 1800 MHz band, F band, A band, E band, WLAN band, and D band, and less than 1.5 in the same bands. Referring to Figure 12, the peak gain of the ceiling-mounted antenna 10 is greater than 3.0 dB in the 1800 MHz band, greater than 3.2 dB in the F band, greater than 3.5 dB in the A band, greater than 4.0 dB in the E band, and greater than 4.5 dB in both the WLAN and D bands. Referring to Figure 13, ... The maximum gain, minimum gain, and gain difference of the ceiling antenna 10 at different operating frequencies are shown in Table 1 below. Based on Table 1, the maximum non-roundness is 0.2942 dB in the 1800 MHz band, 0.3053 dB in the F band, 0.3274 dB in the A band, 0.3483 dB in the E band, 0.3747 dB in the WLAN band, and 0.4905 dB in the D band.

[0147] Table 1

[0148] Based on the simulation parameters above, it can be seen that the ceiling antenna 10 shown in Figure 2 has a better VSWR and higher gain in the 1800 GHz band, F band, A band, E band, WLAN band and D band, and the radiation pattern has better roundness to ensure the uniformity of electromagnetic signals in the coverage area.

[0149] Example 2, taking the ceiling-mounted antenna 10 shown in Figure 5 as an example, wherein the radiating element 3 is a radiating patch with a profile approximately resembling a "light bulb" cross-section, and the dimensions of the radiating element 3 in the height direction and the width direction are 80 mm and 75 mm, respectively, and the radiating element 3 has a second metal strip 32 on both sides in the width direction W of the supporting substrate 2, and the length and width of the second metal strip 32 are 20 mm and 1.8 mm, respectively, and the minimum distance between the second metal strip 32 and the radiating element 3 is 7 mm, the ceiling-mounted antenna 10 is simulated, and the standing wave simulation curve shown in Figure 14, the peak gain simulation curve shown in Figure 15, and the radiation pattern simulation curve shown in Figure 16 are obtained.

[0150] Referring to Figure 14, the VSWR of the ceiling-mounted antenna 10 is less than 1.6 in the 1800 MHz band, F band, A band, E band, WLAN band, and D band, and less than 1.5 in the 1800 MHz band, F band, and A band. Referring to Figure 15, the peak gain of the ceiling-mounted antenna 10 is greater than 3.0 dB in the 1800 MHz band, greater than 3.2 dB in the F band, greater than 3.5 dB in the A band, greater than 4.0 dB in the E band, and greater than 4.5 dB in both the WLAN band and D band. B, thus meeting the gain requirements of the ceiling antenna 10; as shown in Figure 16, the maximum and minimum gains of the ceiling antenna 10 at different operating frequencies are shown in Table 2 below. Table 2 also shows that the maximum non-roundness is 0.2244 dB in the 1800 MHz band, 0.2091 dB in the F band, 0.2075 dB in the A band, 0.2937 dB in the E band, 0.3373 dB in the WLAN band, and 0.4312 dB in the D band.

[0151] Table 2

[0152] Based on the simulation parameters above, it can be seen that the ceiling-mounted antenna 10 with the second metal strip 32 set on both sides of the radiating unit 3 shown in Figure 5 has better VSWR and higher gain in the 1800 GHz band, F band, A band, E band, WLAN band and D band, and the radiation pattern has better roundness, so as to further ensure the uniformity of electromagnetic signals in the coverage area.

[0153] Example 3, taking the ceiling-mounted antenna 10 shown in Figure 6 as an example, wherein the radiating element 3 is a radiating patch with a profile approximately resembling a "light bulb" cross-section, and its dimensions in the height direction and width direction are 90 mm and 85 mm, respectively, and the feed branch 4 includes three feed branches 42, and the radiating element 3 has three pairs of slots 33 corresponding to the three feed branches 42, and the length and width of the slots 33 are 8 mm and 0.5 mm, respectively, the ceiling-mounted antenna 10 is simulated to obtain the standing wave simulation curve shown in Figure 17, the peak gain simulation curve shown in Figure 18, and the radiation pattern simulation curve shown in Figure 19.

[0154] As shown in Figure 17, the VSWR of the ceiling-mounted antenna 10 is less than 1.47 in the 1800 MHz band, F band, A band, E band, WLAN band, and D band. As shown in Figure 18, the peak gain of the ceiling-mounted antenna 10 is greater than 2.9 dB in the 1800 MHz band, greater than 3.3 dB in the F band, greater than 3.5 dB in the A band, greater than 4.0 dB in the E band, and greater than 5 dB in both the WLAN and D bands, thus meeting the gain requirements of the ceiling-mounted antenna 10. According to Figure 19, the maximum and minimum gains of the ceiling antenna 10 at different operating frequencies are shown in Table 3. Table 3 also shows that the maximum non-roundness is 0.2748 dB in the 1800 MHz band, 0.2788 dB in the F band, 0.2916 dB in the A band, 0.3632 dB in the E band, 0.3279 dB in the WLAN band, and 0.3329 dB in the D band.

[0155] Table 3

[0156] Based on the simulation parameters above, it can be seen that the ceiling-mounted antenna 10 with slot 33 in the radiating element 3 shown in Figure 6 has better VSWR in the 1800 MHz band, F band, A band, E band, WLAN band and D band after improving the impedance matching between the feed stub 4 and the radiating element 3. It can also ensure the high gain of the ceiling-mounted antenna 10 and make the radiation pattern of the ceiling-mounted antenna 10 more circular, so as to further ensure the antenna effect of the ceiling-mounted antenna 10.

[0157] Example 4, taking the ceiling-mounted antenna 10 shown in Figure 9 as an example, wherein the radiating element 3 is a radiating patch with a cross-sectional shape approximately resembling a "peach", and its dimensions in the height direction and width direction are 90 mm and 85 mm, respectively; the feed branch 4 includes three feed branches 42; the radiating element 3 has three pairs of slots 33 corresponding to the three feed branches 42, and the length and width of the slots 33 are 8 mm and 0.5 mm, respectively; the first metal strip 31 is provided on the side of the supporting substrate 2 away from the radiating element 3. The ceiling-mounted antenna 10 is simulated to obtain the standing wave simulation curve shown in Figure 20, the peak gain simulation curve shown in Figure 21, and the radiation pattern simulation curve shown in Figure 22.

[0158] As shown in Figure 20, the VSWR of the ceiling-mounted antenna 10 is less than 1.6 in the 1800 MHz band, F band, A band, E band, WLAN band, and D band, and less than 1.5 in the 1800 MHz band, F band, and A band. As shown in Figure 21, the peak gain of the ceiling-mounted antenna 10 is greater than 3.6 dB in the 1800 MHz band, greater than 4.9 dB in the F band, greater than 6.0 dB in the A band, greater than 6.5 dB in the E band, and greater than 5.8 dB in both the WLAN and D bands. B, thus meeting the gain requirements of the ceiling antenna 10; as shown in Figure 22, the maximum and minimum gains of the ceiling antenna 10 at different operating frequencies are shown in Table 4 below. Table 4 also shows that the maximum non-roundness is 0.4937 dB in the 1800 MHz band, 0.2713 dB in the F band, 0.3701 dB in the A band, 0.4226 dB in the E band, 0.4502 dB in the WLAN band, and 0.8571 dB in the D band.

[0159] Table 4

[0160] Based on the simulation parameters above, it can be seen that the radiating unit 3 shown in Figure 9 has a gap 33, and the ceiling antenna 10 with the first metal strip 31 is provided on the back of the supporting substrate 2. After improving the impedance matching between the feed branch 4 and the radiating unit 3, and the coupling between the feed main path 41 of the feed branch 4 and the first metal strip 31, it has better VSWR and higher gain in the 1800 GHz band, F band, A band, E band, WLAN band and D band. At the same time, it makes the radiation pattern of the ceiling antenna 10 have better roundness, so as to further ensure the antenna effect of the ceiling antenna 10.

[0161] Example 5, taking the ceiling-mounted antenna 10 shown in Figure 8 as an example, wherein the radiating element 3 is a radiating patch with a profile approximately resembling a "light bulb" cross-section, and its dimensions in the height direction and width direction are 90 mm and 85 mm, respectively; resonant stubs 34 connected to the main feed path 41 are provided on both sides of the radiating element 3, and resonant blocks 35 are connected to the ends of the resonant stubs 34. The length and width of the resonant stubs 34 are 40 mm and 2 mm, respectively. The ceiling-mounted antenna 10 is simulated, and the standing wave simulation curve shown in Figure 23, the peak gain simulation curve shown in Figure 24, and the non-circularity simulation curve shown in Figure 25 are obtained.

[0162] As shown in Figure 23, the VSWR of the ceiling-mounted antenna 10 is less than 1.5 in the 1800 MHz band, F band, A band, E band, WLAN band, and D band. As shown in Figure 24, the peak gain of the ceiling-mounted antenna 10 is greater than 3.0 dB in the 1800 MHz band, greater than 3.6 dB in the F band, greater than 3.8 dB in the A band, greater than 4.6 dB in the E band, and greater than 5.5 dB in both the WLAN and D bands, thus meeting the gain requirements of the ceiling-mounted antenna 10. According to Figure 25, the maximum and minimum gain of the ceiling antenna 10 at different operating frequencies are shown in Table 5. Table 5 also shows that the maximum non-roundness is 0.3035 dB in the 1800 MHz band, 0.2820 dB in the F band, 0.2971 dB in the A band, 0.3189 dB in the E band, 0.3733 dB in the WLAN band, and 0.7065 dB in the D band.

[0163] Table 5

[0164] Based on the simulation parameters above, it can be seen that the ceiling-mounted antenna 10 with resonant stubs 34 on both sides of the radiating unit 3 shown in Figure 8 effectively improves the operating bandwidth of the ceiling-mounted antenna 10 through the resonance between the resonant stubs 34 and the radiating unit 3. That is, in addition to having better antenna performance in the 1800 GHz band, F band, A band, E band, WLAN band, and D band, it has better VSWR, higher gain, and better radiation pattern circularity in the 1.6 GHz to 1.71 GHz band, so as to ensure the antenna performance of the ceiling-mounted antenna 10.

[0165] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A ceiling-mounted antenna, wherein, include: Fixed base; A carrier substrate, which is a transparent substrate, is located on one side of the fixed base along the thickness direction. The carrier substrate is erected on the fixed base, and the plane of the carrier substrate is perpendicular to the plane of the fixed base. The radiating unit has a grid-like structure and is disposed on the supporting substrate, located on one side of the supporting substrate along the thickness direction; A power supply branch is disposed on the carrier substrate and includes a main power supply line and multiple power supply branches. The main power supply line is located on the side of the radiating unit near the fixed base, and the multiple power supply branches are located on the side of the main power supply line near the radiating unit and are distributed at intervals along the width direction of the carrier substrate. The two ends of each power supply branch are connected to the main power supply line and the radiating unit, respectively.

2. The ceiling-mounted antenna as described in claim 1, wherein, The radiating unit is a radiating patch, and the fixing base includes a grounded metal layer.

3. The ceiling-mounted antenna as described in claim 2, wherein, The fixed base includes a fixed substrate and a grounding metal layer stacked together; The fixed substrate is a transparent substrate, and the grounding metal layer has a grid structure and is located on the side of the fixed substrate closer to the radiating unit.

4. The ceiling-mounted antenna as described in claim 2, wherein, The radiating element has a dimension in the height direction of the supporting substrate that is greater than or equal to 70 mm and less than or equal to 95 mm, and the radiating element has a dimension in the width direction of the supporting substrate that is greater than or equal to 35 mm and less than or equal to 90 mm.

5. The ceiling-mounted antenna as described in claim 2, wherein, The ceiling-mounted antenna also includes a first metal strip; The first metal strip has a mesh structure and is located on the side of the carrier substrate facing away from the radiating unit and on the side of the radiating unit close to the fixed base. The first metal strip is connected to the ground metal layer, and the length of the first metal strip is parallel to the width direction of the carrier substrate.

6. The ceiling-mounted antenna as described in claim 5, wherein, The first metal strip is located on the side of the main power supply circuit near the fixed base.

7. The ceiling-mounted antenna as described in claim 2, wherein, The radiating unit includes a first splicing portion and a plurality of second splicing portions distributed along the height direction of the supporting substrate; The first splicing part is a semi-circular or semi-elliptical structure, the second splicing part is a trapezoidal structure, and multiple second splicing parts are sequentially spliced ​​on the straight side of the first splicing part, and the acute angle formed by the bottom edge and the waist edge of each second splicing part decreases in the direction away from the first splicing part.

8. The ceiling-mounted antenna as described in claim 7, wherein, The second splicing part that is furthest from the first splicing part among the plurality of second splicing parts is connected to the power supply branch; The length of the bottom edge of the second splice that is furthest from the first splice is greater than the length of the main power supply line.

9. The ceiling-mounted antenna as described in claim 1, wherein, The radiating element is a microstrip line, and the ceiling-mounted antenna also includes a grounded metal layer; The grounding metal layer is located on the side of the supporting substrate facing away from the radiating unit, and the grounding metal layer has a grid-like structure.

10. The ceiling-mounted antenna as described in any one of claims 1-9, wherein, The radiating element has multiple pairs of slits; The gap extends to the edge of the radiating unit facing the fixed base. Multiple pairs of gaps correspond one-to-one with multiple power supply branches, and the portion between each pair of gaps on the radiating unit is connected to a corresponding power supply branch.

11. The ceiling-mounted antenna as described in claim 10, wherein, The radiating unit also has a through hole.

12. The ceiling-mounted antenna as described in claim 10, wherein, The width of the gap is greater than or equal to 0.1 mm and less than or equal to 1 mm, and the length of the gap is greater than or equal to 5 mm and less than or equal to 10 mm.

13. The ceiling-mounted antenna as described in any one of claims 1-9, wherein, The ceiling-mounted antenna also includes two sets of second metal strips; Both sets of the second metal strips are located on the side of the carrier substrate closer to the radiating unit, and are distributed on both sides of the radiating unit along the width direction of the carrier substrate; Each group of second metal strips includes a plurality of second metal strips spaced apart along the height direction of the carrier substrate, and the length direction of each second metal strip is parallel to the height direction of the carrier substrate.

14. The ceiling-mounted antenna as described in claim 13, wherein, The length of the second metal strip is greater than or equal to 18 mm and less than or equal to 24 mm, and the width of the second metal strip is greater than or equal to 1.5 mm and less than or equal to 2.2 mm.

15. The ceiling-mounted antenna as described in claim 13, wherein, In the width direction of the carrier substrate, the minimum distance between the second metal strip and the radiating unit is greater than or equal to 5 mm and less than or equal to 15 mm.

16. The ceiling-mounted antenna as described in any one of claims 1-9, wherein, The ceiling-mounted antenna also includes a resonant stub; The two resonant stubs are distributed on both sides of the radiating unit along the width direction of the supporting substrate, and the two resonant stubs are respectively connected to the two ends of the main feed circuit.

17. The ceiling-mounted antenna as claimed in claim 16, wherein, The length of the resonant stub is greater than or equal to 30 mm and less than or equal to 50 mm, and the width of the resonant stub is greater than or equal to 1 mm and less than or equal to 3 mm.

18. The ceiling-mounted antenna as claimed in claim 17, wherein, The resonant stub includes a winding segment.

19. The ceiling-mounted antenna as claimed in claim 16, wherein, A resonant block is connected to the end of the resonant stub away from the main power supply path. The dimension of the resonant block in the width direction of the resonant stub is larger than the width of the resonant stub, and the resonant block has a grid-like structure.

20. The ceiling-mounted antenna as claimed in claim 16, wherein, The resonant stubs are distributed in a straight line, and the angle formed with the fixed base is greater than or equal to 45 degrees and less than or equal to 60 degrees.

21. The ceiling-mounted antenna as claimed in claim 1, wherein, The ceiling-mounted antenna includes a carrier film, which is a transparent thin film. The carrier film is located on one side of the carrier substrate along the thickness direction, and the radiating element is located on the surface of the carrier film facing away from the carrier substrate.

22. The ceiling-mounted antenna as claimed in claim 1 or 21, wherein, The ceiling-mounted antenna also includes a protective film, which is a transparent thin film located on one side of the supporting substrate along the thickness direction and covers the radiating element.

23. The ceiling-mounted antenna as described in claim 1, wherein, The ceiling-mounted antenna also includes a fixing clamp; The fixing clamp has a first fixing arm and a second fixing arm that are vertically connected. The first fixing arm is fixedly connected to the fixing base, and the second fixing arm is fixedly connected to the bearing substrate.

24. The ceiling-mounted antenna as described in claim 23, wherein, The fixing clamp is a transparent structure.

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