Omnidirectional ceiling antenna and electronic device

Abstract

The present disclosure provides an omnidirectional ceiling antenna and an electronic device, and belongs to the technical field of communication. The omnidirectional ceiling antenna comprises a reflecting plate and a radiation structure arranged on the reflecting plate; the plane where the reflecting layer and the radiation structure are located has a certain included angle; the radiation structure comprises a first dielectric substrate and a radiation component arranged on the first dielectric substrate, and the radiation component comprises a radiation part; wherein the radiation part has at least one first slot part, and the orthographic projection of the first slot part on the first dielectric substrate is in a spiral shape; and / or the radiation component further comprises at least one first stub arranged on the first dielectric substrate and coupled with the radiation part.

Description

Technical Field

[0001] This disclosure belongs to the field of communication technology, specifically relating to an omnidirectional ceiling antenna and electronic device. Background Technology

[0002] With the continuous advancement of wireless communication technology, wireless communication devices are increasingly being applied to all aspects of people's lives. Current antenna systems can be broadly categorized into outdoor and indoor types. Extensive coverage of outdoor base stations by various operators has gradually been established, 5G users continue to grow, and 5G services such as high-definition video streaming, Virtual Reality (VR), Augmented Reality (AR), smart healthcare, and smart factories are developing rapidly. On the other hand, analysis shows that in the 5G era, indoor voice traffic accounts for 69.7%, and data traffic reaches as high as 90%. Outdoor base stations alone cannot meet the demands of users' high-traffic services. Therefore, deep indoor coverage determines the future direction of 5G user development and has become the focus of operators' 5G network construction at this stage.

[0003] Indoor ceiling-mounted antennas are an important solution for indoor antenna deployment. Currently, the electrical performance of antennas is no longer the "bottleneck" for indoor coverage. Due to the aesthetic issues of indoor antennas, coupled with some residents' deep misunderstandings and strong resistance to electromagnetic radiation, antenna deployment has not yet achieved true in-home coverage. Indoor coverage in residential areas is basically achieved by outdoor antennas.

[0004] In recent years, operators and antenna manufacturers have begun to explore the use of transparent antennas to address aesthetic concerns. For example, transparent antennas are already being used to replace outdoor spotlight antennas. However, no indoor transparent antennas have yet been released. This is because indoor antennas have higher aesthetic requirements, are more complex to design, and traditional indoor antennas are inexpensive, while transparent antennas are more expensive. These factors limit research into indoor transparent antennas. Therefore, the key challenge in achieving large-scale commercialization of indoor transparent antennas lies in balancing performance, aesthetics, and cost. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art, and to provide an omnidirectional ceiling antenna and electronic device.

[0006] This disclosure provides an omnidirectional ceiling-mounted antenna, which includes a reflector and a radiating structure disposed on the reflector; the planes containing the reflector and the radiating structure have a certain angle; the radiating structure includes a first dielectric substrate and a radiating assembly disposed on the first dielectric substrate, the radiating assembly including a radiating portion; wherein...

[0007] The radiating portion has at least one first groove, and the orthographic projection of the first groove onto the first dielectric substrate is spiral; and / or,

[0008] The radiating component further includes at least one first branch disposed on the first dielectric substrate and coupled to the radiating portion.

[0009] Wherein, when the radiating part has at least one first groove, the number of first grooves is two, and the two first grooves are symmetrically arranged about a first reference line as an axis of symmetry; the first reference line is a straight line that passes through the feed point of the radiating part and extends in a direction perpendicular to the reflector.

[0010] The first groove has a first end and a second end; the midpoint of the line connecting the second ends of the two first grooves is the first midpoint.

[0011] The radiating part also has a second groove, the center of which coincides with the first midpoint.

[0012] The orthographic projection of the second groove onto the first dielectric substrate is either circular or rectangular.

[0013] The radiating part includes a first main body and a first connecting part connected to the first main body; the feed point of the radiating part is located at the first connecting part; the first main body includes a conductive mesh.

[0014] The first main body has a first window recessed toward its center, and the first connecting part is connected to the first window and extends in a direction away from the center of the first main body.

[0015] The radiating part further includes multiple impedance transformation bands, which connect the first main body and the first connecting part; and the multiple impedance transformation bands are symmetrically arranged with the extension direction of the connecting part as the axis of symmetry.

[0016] The reflector is divided into a first reflective portion and a second reflective portion, and the radiation structure is located on the boundary line between the first reflective portion and the second reflective portion.

[0017] One of the first reflective portion and the second reflective portion has at least one slit opening extending through its thickness direction.

[0018] The number of slit openings is multiple;

[0019] When the first reflective part has the slit opening, the slit opening extends in a direction away from the second reflective part, and the portions of the plurality of slit openings are staggered.

[0020] When the second reflective portion has the slit opening, the slit opening extends in a direction away from the first reflective portion, and the portions of the plurality of slit openings are staggered.

[0021] The number of slit openings is multiple;

[0022] When the first reflective part has the slit opening, the slit opening extends in a direction away from the second reflective part, and the plurality of slit openings form a comb-like structure;

[0023] When the second reflective portion has the slit opening, the slit opening extends in a direction away from the first reflective portion, and the plurality of slit openings form a comb-like structure.

[0024] The reflector is divided into a first reflective portion and a second reflective portion, and the radiation structure is located on the dividing line between the first reflective portion and the second reflective portion; the first reflective portion and the second reflective portion have different patterns.

[0025] The contour of one of the first reflective part and the second reflective part is semi-circular, and the contour of the other part is triangular.

[0026] The reflector is divided into a first reflective portion and a second reflective portion, and the radiation structure is located on the boundary line between the first reflective portion and the second reflective portion; the reflector also includes two second branches;

[0027] Both second branches are connected to the first reflective part, but the connection nodes are different; or, both second branches are connected to the second reflective part, but the connection nodes are different.

[0028] The tangent at the intersection of the extension line of the orthographic projection of the radiating structure onto the reflector and the outer contour of the reflector is in the same direction as the extension of the second branch.

[0029] The reflector is divided into a first reflective portion and a second reflective portion, and the radiation structure is located on the boundary line between the first reflective portion and the second reflective portion.

[0030] One of the first reflective portion and the second reflective portion includes a second main body portion and a second connecting portion; the second main body portion has a second window recessed inward toward the boundary line between the first reflective portion and the second reflective portion, and the second connecting portion is connected to the second window.

[0031] The second connecting portion includes a first part and a second part; the first part is connected to the second window and extends in a direction away from the boundary line between the first reflective portion and the second reflective portion, and the second part is connected to the first part; the second part and the second window do not overlap in the orthographic projection of the second part onto the plane where the reflector is located.

[0032] The second part includes a first side and a second side that are set opposite to each other, and a third side and a fourth side that connect the first side and the second side; the first part is connected to the first side, and the length of the second side is not greater than that of the first side, and the third side and the fourth side are curved sides.

[0033] The reflector includes a second dielectric substrate and a reflective layer disposed on the side of the second dielectric substrate facing the radiation structure; the reflective layer includes a conductive mesh.

[0034] The omnidirectional ceiling antenna also includes a feeding structure configured to feed the radiating part.

[0035] The power supply structure includes a transmission cable; the transmission cable includes a first transmission end and a second transmission end; the first transmission end passes through the first via and is connected to the radiation structure, and the shielding layer of the transmission cable is fixedly connected to the reflector at the first transmission end position through a second connection structure.

[0036] The reflector and the radiation structure are connected by at least one first connection structure.

[0037] The first connection structure includes a first connection component and a second connection component that are interconnected; the first connection component is connected to the first dielectric substrate, and the second connection component is connected to the reflector.

[0038] The reflector and the radiation structure are connected by at least one first connection structure.

[0039] The first dielectric substrate has a first connection hole on the end face near the radiating structure. The first connection portion is connected to the first connection hole via a second through hole penetrating the radiating structure on the side of the reflector away from the radiating structure.

[0040] The reflector and the radiation structure are connected by at least one first connection structure.

[0041] The first connection structure includes a first connection component and a second connection component. The first connection component is connected to the end face of the first dielectric substrate and has a first connection hole. The reflector has a second through hole extending along its thickness direction. The first connection component passes through the second through hole, and the second connection component is connected to the first connection hole to fix the first dielectric substrate and the reflector.

[0042] The reflector and the radiation structure are connected by a first connection structure; the first connection structure includes a first connection component and a second connection component.

[0043] The reflector has a first receiving portion on the side opposite to the radiating structure, and the reflector has a third groove extending through its thickness direction; the radiating structure can pass through the third groove, the first connecting component connects to the end face of the radiating structure near the reflector and is installed in the first receiving portion, and is adapted to the first receiving portion, and the second connecting component connects to the first connecting hole in the first receiving portion through a third through hole penetrating the first connecting component.

[0044] This disclosure provides an electronic device comprising an omnidirectional ceiling antenna as described in any one of claims 1-23. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of an omnidirectional ceiling antenna according to an embodiment of the present disclosure.

[0046] Figure 2 This is an exploded view of an omnidirectional ceiling antenna according to an embodiment of this disclosure.

[0047] Figure 3 This is a cross-sectional view of the radial structure according to an embodiment of the present disclosure.

[0048] Figure 4 This is a cross-sectional view of a radiating component according to an embodiment of the present disclosure.

[0049] Figure 5 This is a top view of the radiating section according to an embodiment of the present disclosure.

[0050] Figure 6 This is a top view of a conductive mesh according to an embodiment of the present disclosure.

[0051] Figure 7 This is a schematic diagram of the structure of an omnidirectional ceiling antenna according to an embodiment of the present disclosure.

[0052] Figure 8 This is a front view of an omnidirectional ceiling antenna, representing a first example of an embodiment of this disclosure.

[0053] Figure 9This is a top view of an omnidirectional ceiling antenna, representing a first example of an embodiment of this invention.

[0054] Figure 10 The VSWR-frequency relationship diagram is for the first example of an omnidirectional ceiling antenna.

[0055] Figure 11 The gain-frequency relationship diagram is for the first example of an omnidirectional ceiling antenna.

[0056] Figure 12a and 12b This is a two-dimensional horizontal radiation pattern of the omnidirectional ceiling antenna in the first example.

[0057] Figure 13 The original Smith diagram for the omnidirectional ceiling antenna of the first example.

[0058] Figure 14 This is a front view of an omnidirectional ceiling antenna, representing a second example of an embodiment of this disclosure.

[0059] Figure 15 The VSWR-frequency relationship diagram is for the second example of an omnidirectional ceiling antenna.

[0060] Figure 16 This is a gain-frequency diagram for the second example of an omnidirectional ceiling antenna.

[0061] Figure 17a and 17b This is a two-dimensional horizontal radiation pattern of an omnidirectional ceiling antenna, as shown in the second example.

[0062] Figure 18 The original Smith diagram for the omnidirectional ceiling antenna in the second example.

[0063] Figure 19 This is a front view of an omnidirectional ceiling antenna, representing a third example of an embodiment of this disclosure.

[0064] Figure 20 The VSWR-frequency relationship diagram is for the third example of an omnidirectional ceiling antenna.

[0065] Figure 21 This is a gain-frequency diagram for the third example of an omnidirectional ceiling antenna.

[0066] Figure 22a and 22b This is a two-dimensional horizontal radiation pattern of an omnidirectional ceiling antenna, as shown in the third example.

[0067] Figure 23 The original Smith diagram for the omnidirectional ceiling antenna of the third example.

[0068] Figure 24This is a front view of an omnidirectional ceiling antenna, representing a fourth example of an embodiment of this disclosure.

[0069] Figure 25 The VSWR-frequency relationship diagram is for the fourth example of an omnidirectional ceiling antenna.

[0070] Figure 26 This is the gain-frequency relationship diagram for the fourth example of an omnidirectional ceiling antenna.

[0071] Figure 27a and 27b This is a two-dimensional horizontal radiation pattern of an omnidirectional ceiling antenna, as shown in the fourth example.

[0072] Figure 28 The original Smith diagram for the omnidirectional ceiling antenna in the fourth example.

[0073] Figure 29 This is a top view of an omnidirectional ceiling antenna, representing a fifth example of an embodiment of this disclosure.

[0074] Figure 30 The VSWR-frequency relationship diagram is for the fifth example of an omnidirectional ceiling antenna.

[0075] Figure 31 This is the gain-frequency relationship diagram for the fifth example of an omnidirectional ceiling antenna.

[0076] Figure 32a and 32b This is a two-dimensional horizontal radiation pattern of the omnidirectional ceiling antenna in the fifth example.

[0077] Figure 33 The original Smith diagram for the omnidirectional ceiling antenna in the fifth example.

[0078] Figure 34 This is a top view of an omnidirectional ceiling antenna, representing a sixth example of an embodiment of this disclosure.

[0079] Figure 35 This is a schematic diagram of an omnidirectional ceiling antenna, representing a sixth example of an embodiment of this disclosure.

[0080] Figure 36 The VSWR-frequency relationship diagram is for the omnidirectional ceiling antenna of the sixth example.

[0081] Figure 37 This is the gain-frequency relationship diagram for the sixth example of an omnidirectional ceiling antenna.

[0082] Figure 38a and 38b This is a two-dimensional horizontal radiation pattern of the omnidirectional ceiling antenna in the sixth example.

[0083] Figure 39The original Smith diagram for the omnidirectional ceiling antenna in the sixth example.

[0084] Figure 40 This is a top view of an omnidirectional ceiling antenna, representing a seventh example of an embodiment of this disclosure.

[0085] Figure 41 The VSWR-frequency relationship diagram is for the omnidirectional ceiling antenna of the seventh example.

[0086] Figure 42 This is the gain-frequency relationship diagram for the seventh example of an omnidirectional ceiling antenna.

[0087] Figure 43a and 43b This is the horizontal two-dimensional radiation pattern of the omnidirectional ceiling antenna in the seventh example.

[0088] Figure 44 The original Smith diagram for the omnidirectional ceiling antenna of the seventh example.

[0089] Figure 45 This is a top view of an omnidirectional ceiling antenna, representing an eighth example of an embodiment of this disclosure.

[0090] Figure 46 The VSWR-frequency relationship diagram is for the omnidirectional ceiling antenna of the eighth example.

[0091] Figure 47 This is the gain-frequency relationship diagram for the omnidirectional ceiling antenna in the eighth example.

[0092] Figure 48a and 48b This is the horizontal two-dimensional radiation pattern of the omnidirectional ceiling antenna in the eighth example.

[0093] Figure 49 The original Smith diagram for the omnidirectional ceiling antenna of the eighth example.

[0094] Figure 50 This is a top view of an omnidirectional ceiling antenna, representing a ninth example of an embodiment of this disclosure.

[0095] Figure 51 The VSWR-frequency relationship diagram is for the omnidirectional ceiling antenna of the ninth example.

[0096] Figure 52 This is the gain-frequency relationship diagram for the omnidirectional ceiling antenna in the ninth example.

[0097] Figure 53a and 53b This is the horizontal two-dimensional radiation pattern of the omnidirectional ceiling antenna in the ninth example.

[0098] Figure 54The original Smith diagram for the omnidirectional ceiling antenna of the ninth example.

[0099] Figure 55 This is a schematic diagram of another omnidirectional ceiling antenna structure according to an embodiment of the present disclosure.

[0100] Figure 56 for Figure 55 Exploded view of an omnidirectional ceiling antenna.

[0101] Figure 57 for Figure 55 VSWR-frequency relationship diagram of omnidirectional ceiling antenna.

[0102] Figure 58 for Figure 55 Gain-frequency relationship diagram of an omnidirectional ceiling antenna.

[0103] Figure 59a and 59b for Figure 55 The horizontal two-dimensional radiation pattern of the omnidirectional ceiling antenna.

[0104] Figure 60 This is a schematic diagram showing the connection between the radiating structure and the reflector of an omnidirectional ceiling antenna according to an embodiment of this disclosure.

[0105] Figure 61 This is a schematic diagram of the end face of the first dielectric substrate near the reflector in an embodiment of this disclosure.

[0106] Figure 62 This is a schematic diagram showing another connection between the radiating structure and the reflector of the omnidirectional ceiling antenna according to an embodiment of this disclosure.

[0107] Figure 63 This is a schematic diagram of the radiating structure of the omnidirectional ceiling antenna according to an embodiment of the present disclosure after it is connected to the reflector.

[0108] Figure 64 This is a schematic diagram of the end face of the first dielectric substrate near the reflector in an embodiment of this disclosure.

[0109] Figure 65 This is a schematic diagram of the reflector near the radiating structure according to an embodiment of the present disclosure.

[0110] Figure 66 This is a schematic diagram showing another connection between the radiating structure and the reflector of the omnidirectional ceiling antenna according to an embodiment of this disclosure.

[0111] Figure 67 This is a schematic diagram showing another connection between the radiating structure and the reflector of the omnidirectional ceiling antenna according to an embodiment of this disclosure.

[0112] Figure 68 This is a schematic diagram of the connection between the transmission cable and the second connection structure according to an embodiment of this disclosure.

[0113] Figure 69 This is a schematic diagram showing the connection between the transmission cable and the reflector in an embodiment of this disclosure.

[0114] Figure 70 This is a schematic diagram of the third connection structure according to an embodiment of the present disclosure. Detailed Implementation

[0115] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0116] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0117] Before describing the embodiments of this disclosure, some terms used in the following examples will be explained in order to better understand the embodiments of this disclosure.

[0118] 1. The 900 band refers to 880MHz–960MHz; the 1800 band refers to 1710MHz–1850MHz; the F band refers to 1885MHz–1915MHz; the A band refers to 2010MHz–2025MHz; the E band refers to 2300MHz–2400MHz; the WLAN band refers to 2400MHz–2483.5MHz; and the D band refers to 2515MHz–2675MHz.

[0119] 2. Multi-band antenna, specifically refers to an antenna that can simultaneously meet the technical requirements of multiple radio frequency bands.

[0120] 3. Non-circularity refers to the difference (positive or negative) between the maximum or minimum value and the average value within a 360-degree range on a certain plane of an omnidirectional antenna. It is generally expressed as ±(maximum value - minimum value) / 2. For the 900 MHz band, non-circularity is calculated using a θ = 90° cut plane, while for other frequency bands, it is calculated using a θ = 120° cut plane. A smaller non-circularity indicates better omnidirectional radiation characteristics of the antenna.

[0121] 4. VSWR, Voltage Standing Wave Ratio, is the abbreviation for Voltage Standing Wave Ratio. It refers to the ratio of the voltage amplitude at the antinodes to the voltage amplitude at the troughs of a transmission line, also known as the standing wave coefficient or standing wave ratio. When the standing wave ratio is equal to 1, it means that the impedance of the feed line and the antenna are perfectly matched, and all high-frequency energy is radiated by the antenna without any energy reflection loss; when the standing wave ratio is infinite, it means total reflection, and no energy is radiated at all.

[0122] Figure 1 This is a schematic diagram of the structure of an omnidirectional ceiling-mounted antenna according to an embodiment of the present disclosure; Figure 2 This is an exploded view of an omnidirectional ceiling antenna according to an embodiment of this disclosure; as shown Figure 1 and 2 As shown, this embodiment of the disclosure provides an omnidirectional ceiling-mounted antenna, which includes a reflector 2, a radiating structure 1, and a feeding structure 3. The reflector 2 is fixed to the radiating structure 1, and the planes containing them form a certain angle. The feeding structure 3 is configured to feed the radiating structure 1. It should be noted that... Figure 1 This example only uses the case where the plane containing reflector 2 and the plane containing radiating structure 1 are orthogonal, meaning the angle between their planes is 90°. However, it should be understood that the plane containing reflector 2 and the plane containing radiating structure 1 are not necessarily orthogonal; for example, the angle between their planes can be 90° ± 15°. In some examples, Figure 3 This is a cross-sectional view of the radial structure 1 according to an embodiment of this disclosure; as shown Figure 3 As shown, the radiating structure 1 includes a first dielectric substrate 11 and a radiating component 12 disposed on the first dielectric substrate 11. The radiating component 12 is connected to the feeding structure 3.

[0123] Specifically, Figure 4 This is a cross-sectional view of a radiating component 12 according to an embodiment of this disclosure; as shown Figure 4As shown, the radiating assembly 12 includes at least a first substrate 121, a radiating portion 122 disposed on the side of the first substrate 121 facing away from the first dielectric substrate 11, and a first adhesive layer 123 disposed on the side of the first substrate 121 facing away from the radiating portion 122, connecting the first substrate 121 and the first dielectric substrate 11. Furthermore, a protective film 124 may be disposed on the side of the radiating portion 122 facing away from the first dielectric substrate 11 to isolate water and oxygen and prevent oxidation of the radiating portion 122. Additionally, before the radiating assembly 12 is bonded to the first dielectric substrate 11, a release film 125 is disposed on the side of the first adhesive layer 123 of the radiating assembly 123 facing away from the first substrate 121. The release film 125 can be removed when bonding the radiating assembly 12 to the first dielectric substrate 11.

[0124] In some examples, an encapsulation layer can be provided on the side of the radiating portion 122 facing away from the first dielectric substrate 11, in which case the protective film 124 is not required. Specifically, the encapsulation layer can be made of transparent optical adhesive (OCA optical adhesive) or transparent oxide, such as silicon oxide. The thickness of the encapsulation layer is approximately a few micrometers to tens of micrometers.

[0125] The radiating portion 122 can be made of a metallic material, such as copper. The thickness of the radiating portion 122 is not less than three times the skin depth, preferably not less than 2.5 μm, to ensure the antenna's radiation performance. The first substrate 121 is preferably made of a material with low haze, high transmittance, and temperature and corrosion resistance, such as polyethylene terephthalate (PET), polyimide (PI), polymers of cycloolefin (COP), or poly1,4-cyclohexylenedimethylene terephthalate (PCT). PET is preferred for cost considerations. The first adhesive layer is specifically made of transparent optical adhesive. In some examples, the material of the first dielectric substrate 1111 includes, but is not limited to, polycarbonate (PC), polymers of cycloolefin (COP), or polymethyl methacrylate (PMMA).

[0126] Furthermore, Figure 5 This is a top view of the radiating section 122 according to an embodiment of this disclosure; as shown Figure 5As shown, the radiating part 122 specifically includes a first main body 1221 and a first connecting part 1222 connecting the first main body 1221. The first connecting part 1222 is connected to the feeding structure 3, for example, by soldering. The first main body 1221 may include a conductive mesh, which helps improve light transmittance and thus enhances the antenna's concealment. As the first connecting part 1222 serves as the connector between the radiating part 122 and the feeding structure 3, it is a solid structure to ensure a stable connection between them. Furthermore, the protective film on the radiating assembly 12 only covers the first main body 1221; the first connecting part 1222 is unprotected, exposing the area where the radiating part 122 connects to the feeding structure 3.

[0127] In some examples, Figure 6 This is a top view of the conductive mesh according to an embodiment of the present disclosure; as shown Figure 6 As shown, the conductive mesh may include multiple intersecting first and second conductive lines. For example, the extension directions of the first and second conductive lines of the conductive mesh may be perpendicular to each other, forming a square or rectangular cutout. Alternatively, the extension directions of the first and second conductive lines of the conductive mesh may not be perpendicular; for example, the angle between the extension directions of the first and second conductive lines may be 45°, forming a rhomboid cutout. Furthermore, the cutout shape of the conductive mesh can also be a triangle or other polygons, and the conductive mesh is not limited to only including conductive lines in two extension directions. Specific settings can be made according to the specific shape. In this embodiment, the conductive mesh may include multiple intersecting first and second conductive lines as an example.

[0128] In this embodiment, the ends of the first and second conductive lines of the conductive mesh are connected together, meaning the outer perimeter of the metal mesh forms a closed loop. In actual products, the ends of the first and second conductive lines of the conductive mesh may also be unconnected, meaning the outer perimeter of the conductive mesh is radial. In this embodiment, using a conductive mesh can achieve a light transmittance of approximately 70%-88% for the transparent antenna.

[0129] In some examples, the linewidth, line thickness, and line spacing of the first conductive line 601 and the second conductive line 602 of the conductive mesh are preferably the same, but they can also be different. For example, the linewidth W1 of the first conductive line 601 and the second conductive line 602 are both about 2-30 μm, the line spacing W2 is about 5-200 μm, and the line thickness is about 1-10 μm. It can be understood that the sheet resistance and transmittance can be adjusted by changing the linewidth, line thickness, and line spacing of the first conductive line 601 and the second conductive line 602. Therefore, the linewidth, line thickness, and line spacing of the first conductive line 601 and the second conductive line 602 of the conductive mesh can be specifically designed according to the sheet resistance and transmittance requirements.

[0130] In some examples, the conductive mesh can be made of metal. In this embodiment, copper is used as the material for the conductive mesh. To further improve the concealment of the conductive mesh, the copper surface can be blackened after the conductive mesh is formed, which will also reduce the brightness of the copper.

[0131] Furthermore, the first main body 1221 of the radiating portion 122 has a first window 100 recessed towards its center, and a first connecting portion 1222 is connected to the first window 100 and extends in a direction away from the center of the first main body 1221. The first connecting portion 1222 has a first side and a second side disposed opposite to each other along its extending direction, and a third side and a fourth side connecting the first side and the second side and disposed opposite to each other. The first side of the first connecting portion 1222 is connected to the first main body 1221; the third and fourth sides of the first connecting portion 1222 are both spaced from the edge of the first window 100. This arrangement is because, since the first connecting portion 1222 has no protective film, spacing the third and fourth sides of the first connecting portion 1222 from the edge of the first window 100 prevents external water and oxygen from corroding the first main body 1221, thus avoiding the problem of breakage due to oxidation in the conductive mesh of the first main body 1221. The distance between the third and fourth sides of the first connecting part 1222 and the edge of the first window 100 depends on the adhesion accuracy of the protective film. Generally, the distance is greater than 1.5 times the adhesion error of the protective film.

[0132] In some examples, continue to refer to Figure 5 The radiating section 122 includes not only the first main body 1221 and the first connecting section 1222 connecting the first main body 1221, but also a plurality of impedance transformation bands 1223 connecting the first main body 1221 and the first connecting section 1222. The plurality of impedance transformation bands 1223 are symmetrically arranged with the extension direction of the first connecting section 1222 as the axis of symmetry. By using the impedance transformation bands 1223 to achieve impedance matching between the feed structure 3 and the first main body 1221, the size of the radiating structure 1 is reduced, and the antenna is miniaturized.

[0133] In some examples, Figure 7 This is a schematic diagram of the structure of an omnidirectional ceiling-mounted antenna according to an embodiment of this disclosure; as shown Figure 7 As shown, the radiating portion 122 of this embodiment has at least one first groove 1224, specifically formed on the first main body 1221. The orthographic projection of the first groove 1224 onto the first dielectric substrate 11 is spiral, that is, an inductor is introduced into the radiating portion 122. In this embodiment, at least one first branch 1226 coupled to the radiating portion 122 can also be provided on the first dielectric substrate 11, that is, a capacitor is introduced into the radiating portion 122. In this embodiment, multi-band impedance matching of the antenna can be achieved by introducing an inductor or capacitor into the radiating portion 122.

[0134] Furthermore, the number of first slots 1224 and the number of first branches 1226 in this embodiment can be obtained through antenna performance simulation. For example, two first slots 1224 can be provided on the first main body 1221, and the two first slots 1224 are symmetrically arranged about a first reference line as an axis of symmetry; wherein, the first reference line is a straight line that passes through the feed point of the radiating part 122 and extends in a direction perpendicular to the reflector 2. For example, there can be three first branches 1226. One first branch 1226 is located at the end of the first main body 1221 away from the reflector 2. This first branch 1226 can be composed of a first line segment and two second line segments at both ends of the first line segment, with extension directions different from the first line segment. Both the first and second line segments are coupled to the first main body 1221. The other two of the three first branches 1226 are located on both sides of the first connecting part 1222 and coupled to the first main body 1221. These two first branches 1226 can also be symmetrically arranged with the first reference line as an axis of symmetry. This method can balance the non-circularity of the antenna's horizontal radiation pattern.

[0135] Furthermore, continue to refer to Figure 7In this embodiment, the first main body 1221 not only has two first grooves 1224, but also a second groove 1225 located between the two first grooves 1224. Each first groove 1224 has a first end and a second end. The center of the line connecting the second ends of the two first grooves 1224 is the first center, and the center of the second groove 1225 coincides with the first center. It should be noted that the first end of the first groove 1224 is the starting point of the innermost circle of the first groove 1224, and the second end is the ending point of the outermost circle of the first groove 1224. In some examples, the second groove 1225 can be circular, in which case the center of the circle is the center of the second groove 1225. Alternatively, the second groove 1225 can be rectangular, with the length of the rectangle extending in the direction of the first reference line, and the intersection of the two diagonals of the rectangle being the center of the second groove 1225. By setting the second groove 1225, the non-circularity of the horizontal radiation pattern within multiple frequency bands can be balanced.

[0136] In some examples, the reflector 2 is fixed to the radiating structure 1 and divided into two parts by the radiating structure 1: a first reflector 21 and a second reflector 22. In this case, the radiating structure 1 is located on the boundary line between the first reflector 21 and the second reflector 22. The first reflector 21 and the second reflector 22 are asymmetrical structures. For example, a slit opening 213 can be provided on one of the first reflector 21 and the second reflector 22, or a stub can be added to one of the first reflector 21 and the second reflector 22, or the first reflector 21 and the second reflector 22 can be set with different patterns. Regardless of the method used, it is possible to extend the equivalent electrical length without increasing the actual size while minimizing the antenna size as much as possible.

[0137] It should be noted that, taking the circular outline of the reflector 2 in the related technology as an example, the outlines of the corresponding first reflector 21 and second reflector 22 are both semi-circular. In this embodiment, only the second reflector 22 adopts the same pattern as in the related technology, and only the first reflector 21 is patterned to achieve antenna miniaturization. However, it should be understood that the structures of the first reflector 21 and the second reflector 22 can be interchanged. In this embodiment, only the pattern design of the first reflector 21 compared to the related technology is taken as an example. Hereinafter, the antenna of this embodiment will be described with the radiating part 122 in the radiating structure 1 having two first slots 1224, and a circular second slot 1225 opened between the two first slots 1224, while adding three first branches 1226 coupled to the radiating part 122, and in combination with different reflector 2 designs.

[0138] First example: Figure 8 This is a front view of an omnidirectional ceiling antenna, representing a first example of an embodiment of this disclosure. Figure 9This is a top view of an omnidirectional ceiling antenna according to a first example of an embodiment of the present invention; as shown Figure 8 and 9 As shown, in this example, the antenna is a monopole antenna. The first reflecting part 21 in the reflector 2 includes a second main body 211 and a second connecting part 212. The second main body 211 has a second window 200 recessed in the direction of the second reflecting part 22, and the second connecting part 212 is connected to the second window 200. The second connecting part 212 can be described as "T"-shaped. Specifically, the second connecting part 212 includes a first part 212a and a second part 212b. The first part 212a is connected to the second window 200 and extends in a direction away from the second reflecting part 22. The second part 212b is connected to the first part 212a. The second part 212b and the second window 200 do not overlap in their orthographic projections onto the plane of the reflector 2. That is, the second part 212b is located on the side of the second main body 211 away from the second reflecting part 22. In this case, the radiating structure 1 and the first reflector 21 constitute an effective structure of the monopole antenna, and by designing the first reflector 21 as the aforementioned structure, the antenna size can be miniaturized as much as possible while meeting the performance indicators.

[0139] In this design, the extension direction of the first reference line is defined as the second direction, and the direction perpendicular to the second direction is defined as the first direction. The first groove 1224 includes multiple first sub-grooves and multiple second sub-grooves, which are alternately arranged and connected. The length direction of the first sub-grooves is the extension direction of the first sub-grooves, and the length direction of the second sub-grooves is the extension direction of the second sub-grooves. In this example, the first groove 1224 includes four first sub-grooves and three second sub-grooves.

[0140] In this example, the radiating section 122 in the radiating structure 1 has two first slots 1224, and three first branches 1226 coupled to the radiating section 122 are added, that is, a pair of inductors and three capacitors are introduced. This practical approach allows for a VSWR of less than 1.5 across all operating frequency bands. In this example, the first slot 1224 between the pair of spiral coils (inductors) is for impedance matching across multiple frequency bands. Furthermore, the second slot 1225 between the pair of spiral coils can balance the non-circularity of the horizontal radiation pattern across multiple frequency bands. This second slot 1225 can be a circular slot as shown in the figure, or it can be a rectangular slot whose length extends along the direction of the first reference line. Figure 10 and 11The VSWR (Voltage Standing Wave Ratio) and gain of the designed antenna are given. The gain here is the gain value in the direction of maximum radiation of the antenna. It can be seen that the VSWR is <1.6 in the entire operating frequency range, and the VSWR is <1.5 in the other operating frequency ranges except for the D band. The gain is greater than 2.0dBi in all operating frequency bands, and meets the requirements for use of indoor distributed antennas in each frequency band. Figure 12a and 12b The horizontal two-dimensional radiation pattern of the designed antenna is presented, along with the difference between the maximum and minimum gain for each curve. The non-circularity of the radiation pattern is less than 0.6 within the 900 MHz band and less than 1.5 in all other bands. The impedance matching of the designed antenna across the entire operating frequency range is described below. Figure 13 The original Smith chart shows that the overall convergence is good, with a slight leftward bias at high frequencies, indicating that impedance matching needs improvement. Matching in other frequency bands is good, which can also be verified by VSWR.

[0141] Second example: Figure 14 This is a front view of an omnidirectional ceiling-mounted antenna, representing a second example of an embodiment of this disclosure; as shown... Figure 14 As shown, this example has a structure that is largely the same as the first example, except that the first slot 1224 includes three first sub-slots and two second sub-slots. This design can further optimize the impedance matching of the antenna in the D band. Figure 15 and 16 The VSWR (Voltage Standing Wave Ratio) and gain of the designed antenna are given. The gain here is the gain value in the direction of maximum radiation of the antenna. It can be seen that the VSWR is <1.5 in the entire operating frequency range, and the standing wave in the D band is significantly improved. The gain is greater than 2.0 dBi in all operating frequency bands, and meets the requirements for use of indoor distributed antennas in each frequency band. Figure 17a and 17b The horizontal two-dimensional radiation pattern of the designed antenna is presented, along with the difference between the maximum and minimum gain values ​​for each curve. The non-circularity of the pattern is less than 0.6 within the 900 MHz band and less than 1.5 in all other bands. Compared to the first example, the antenna's gain and non-circularity remain essentially unchanged. The impedance matching of the designed antenna across the entire operating frequency range is shown below. Figure 18 The original Smith graph provided shows that, compared to Figure 13 In comparison, the convergence of the 900 MHz band is slightly divergent, the D band shifts slightly to the right, and the impedance matching is better, which can also be verified by VSWR.

[0142] Third example: Figure 19 This is a front view of an omnidirectional ceiling-mounted antenna, representing a third example of an embodiment of this disclosure; as shown... Figure 19As shown, this example has a structure that is largely the same as the first and second examples, except that the first slot 1224 includes three first sub-slots and three second sub-slots. This design further optimizes the impedance matching of the antenna in the D band and illustrates the effect of the number of spiral coil sections on the standing wave. Figure 20 and 21 The VSWR (Voltage Standing Wave Ratio) and gain of the designed antenna are given. The gain here is the gain value in the direction of maximum radiation of the antenna. It can be seen that the VSWR is <1.5 in the entire operating frequency range, and the standing wave in the D band is significantly improved. For the VSWR of Examples 2 and 3, it can be found that the trend of change in the D band is different, that is, the number of sections of the helical coil has a greater impact on the high frequency band. The gain is greater than 2.0 dBi in all operating frequency bands, and the requirements for use of indoor distributed antennas are met in each frequency band. Figure 22a and 22b The horizontal two-dimensional radiation pattern of the designed antenna is presented, along with the difference between the maximum and minimum gain values ​​for each curve. The non-circularity of the pattern is less than 0.6 within the 900 MHz band and less than 1.5 in all other bands. Compared to the first example, the antenna's gain and non-circularity remain essentially unchanged. The impedance matching of the designed antenna across the entire operating frequency range is shown below. Figure 23 The original Smith graph provided shows that, compared to Figure 13 In comparison, the convergence of the 900 MHz band is slightly divergent, the D band shifts slightly to the right, and the impedance matching is better, which can also be verified by VSWR.

[0143] Fourth example: Figure 24 This is a front view of an omnidirectional ceiling-mounted antenna, representing a fourth example of an embodiment of this disclosure; as shown... Figure 24 As shown, this example is structurally similar to the third example, except that the second slot 1225 is not provided in this example, and the distance between the two first slots 1224 in this example is greater than the distance between the two third slots in the third example. The structural design of this example can further optimize the impedance matching of the antenna in the D band. Figure 25 and 26 The VSWR (Voltage Standing Wave Ratio) and gain of the designed antenna are given. The gain here is the gain value in the direction of maximum radiation of the antenna. It can be seen that the VSWR is <1.5 in the entire operating frequency range, and the standing wave in the D band is significantly improved. Its trend is the same as that of the second example. The gain is greater than 2.0 dBi in all operating frequency bands, and the requirements for use of indoor distributed antennas are met in each frequency band. Figure 27a and 27bThe horizontal two-dimensional radiation pattern of the designed antenna is presented, along with the difference between the maximum and minimum gain values ​​for each curve. The non-circularity of the pattern is less than 0.6 within the 900 MHz band and less than 1.4 in the other bands. Compared to Example 3, the antenna gain and non-circularity remain essentially unchanged. The impedance matching of the designed antenna across the entire operating frequency range is as follows: Figure 28 The original Smith graph provided shows that, compared to Figure 23 In comparison, the overall impedance has shifted slightly to the right, resulting in better impedance matching, which can also be verified by VSWR.

[0144] Fifth example: Figure 29 This is a top view of an omnidirectional ceiling-mounted antenna, representing a fifth example of an embodiment of this disclosure; as shown... Figure 29 As shown, this example is structurally similar to the first example, except that the second part 212b of the second connecting portion 212 in the first example is rectangular, while the second part 212b in this example is obtained by chamfering the rectangular structure of the first example. Specifically, the second part 212b in this example includes a first side S1 and a second side S2 arranged opposite to each other, and a third side S3 and a fourth side S4 connecting the first side S1 and the second side S2. The first side S1 connects to the first part 212a of the second connecting portion 212, and the length of the first side S1 is greater than the length of the second side S2. The third side S3 and the fourth side S4 are curved sides. This structure can also reduce the size of the antenna. Figure 30 and 31 The VSWR (Voltage Standing Wave Ratio) and gain of the designed antenna are given. The gain here is the gain value in the direction of maximum radiation of the antenna. It can be seen that the VSWR is <1.5 in the entire operating frequency range; the gain is greater than 2.0 dBi in all operating frequency bands, and the requirements for use of indoor distributed antennas are met in each frequency band. Figure 32a and 32b The horizontal two-dimensional radiation pattern of the designed antenna is presented, along with the difference between the maximum and minimum gain values ​​for each curve. The non-circularity of the radiation pattern is less than 0.8 within the 900 MHz band and less than 1.5 in the other bands. It can be observed that the non-circularity deteriorates in the 900 MHz and WLAN bands. The impedance matching of the designed antenna across the entire operating frequency range is described below. Figure 33 The original Smith graph provided shows that, compared to Figure 13 In comparison, the 900 MHz band shifts significantly to the right, while the WLAN band shifts to the left. As a result, the overall convergence is slightly reduced, but the overall impedance remains good, which can also be verified by VSWR.

[0145] Sixth example: Figure 34 This is a top view of an omnidirectional ceiling-mounted antenna, representing a sixth example of an embodiment of this disclosure; as shown... Figure 34As shown, the reflector 2 in this example differs from the example above. In this example, the outline of the first reflective portion 21 of the reflector 2 is the same as that of the second reflective portion 22, both being semi-circular. The difference is that the first reflective portion 21 has at least one slit opening 213, extending along its length. This slit opening 213 extends in a direction away from the second reflective portion 22. This arrangement maximizes antenna miniaturization, extending the equivalent electrical length without increasing the actual size. Figure 34 The middle entry includes a slit opening 213, such as Figure 35 The number of slit openings 213 shown can be multiple, and at least some of the slit openings 213 are staggered.

[0146] Figure 36 and 37 The VSWR (Voltage Standing Wave Ratio) and gain of the designed antenna are given. The gain here is the gain value in the direction of maximum radiation of the antenna. It can be seen that the VSWR is <1.8 in the entire operating frequency range. The VSWR in the high-frequency part can be less than 1.5, but the VSWR is the largest in the 900 GHz band. The gain is greater than 1.8 dBi in all operating frequency bands, and meets the requirements for use of indoor distributed antennas in each frequency band. Figure 38a and 38b The horizontal two-dimensional radiation pattern of the designed antenna is presented, along with the difference between the maximum and minimum gain for each curve. The non-circularity of the pattern is less than 0.3 within the 900 MHz band and less than 1.2 in all other bands, with the highest non-circularity observed in the D band. The impedance matching of the designed antenna across the entire operating frequency range is described below. Figure 39 The original Smith chart shows that the overall convergence needs improvement, especially in the 900 MHz band, which needs to be moved downwards, and the 1800 MHz band, which needs to be moved to the right. However, the impedance matching is acceptable, which can also be verified by the VSWR. Furthermore, in this embodiment, the size and location of the lateral gap on GND have little impact on performance and are not subject to special restrictions.

[0147] Seventh example: Figure 40 This is a top view of an omnidirectional ceiling-mounted antenna, representing a seventh example of an embodiment of this disclosure; as shown... Figure 40 As shown, this example has a structure that is roughly the same as the sixth example, except that the multiple slit openings 213 on the first reflector 21 in this example form a comb-shaped opening. Each slit opening 213 is flush with one end near the second reflector 22 and the other end extends through the edge of the first reflector 21. This design optimizes the impedance matching of the antenna in the 900 MHz band.

[0148] Figure 41 and 42The VSWR (Voltage Standing Wave Ratio) and gain of the designed antenna are given. The gain here is the gain value in the direction of maximum radiation of the antenna. It can be seen that the VSWR is <1.8 in the entire operating frequency range. The VSWR in the high-frequency part can be less than 1.5, but the VSWR is the largest in the 900 GHz band. Compared with the sixth example, the VSWR in the 1800 GHz band is slightly improved. The gain is greater than 1.8 dBi in all operating frequency bands, and the requirements for indoor distributed antennas are met in each frequency band. Figure 43a and 43b The horizontal two-dimensional radiation pattern of the designed antenna is presented, along with the difference between the maximum and minimum gain values ​​for each curve. The non-circularity of the pattern is less than 0.3 within the 900 MHz band and less than 1.2 in all other bands, with the highest non-circularity occurring in the D band. Compared to the sixth example, the antenna's gain and non-circularity remain essentially unchanged. The impedance matching of the designed antenna across the entire operating frequency range is shown below. Figure 44 The original Smith graph provided shows that, compared to Figure 39 In comparison, there are essentially no changes, which can also be verified by VSWR. Furthermore, in this embodiment, the number and size of the comb-like gaps on GND have little impact on performance and are not subject to special restrictions.

[0149] Eighth example: Figure 45 This is a top view of an omnidirectional ceiling-mounted antenna, an eighth example of an embodiment of this disclosure; as shown... Figure 45 As shown, the first reflective part 21 of the reflector 2 in this example is different from the structure described above. The outline of the first reflective part 21 in this example is triangular. This design method can further optimize the impedance matching of the antenna in the D band.

[0150] Figure 46 and 47 The VSWR (Voltage Standing Wave Ratio) and gain of the designed antenna are given. Here, the gain is the gain value in the direction of maximum radiation of the antenna. It can be seen that the VSWR is <1.5 in the entire operating frequency range, and the standing wave in the D band is significantly improved. For the VSWR of the seventh and eighth examples, it can be found that the trend of change in the D band is different. That is to say, the number of the first and second sub-slots of the helical coil has a greater impact on the high frequency band. The gain is greater than 2.0 dBi in all operating frequency bands, and meets the requirements for use of indoor distributed antennas in each frequency band. Figure 48a and 48b The horizontal two-dimensional radiation pattern of the designed antenna is presented, along with the difference between the maximum and minimum gain values ​​for each curve. The non-circularity of the pattern is less than 0.3 within the 900 MHz band and less than 1.1 in the other bands. Compared to Example 1, the antenna's gain and non-circularity remain essentially unchanged. The impedance matching of the designed antenna across the entire operating frequency range is shown below. Figure 49The original Smith graph provided shows that, compared to Figure 39 In comparison, the 900 MHz band is slightly shifted to the left, resulting in better convergence and impedance matching in the D band, which can also be verified by VSWR. Furthermore, in this embodiment, the cone shape of the GND layer can also be frustoconical; there are no particular restrictions.

[0151] Ninth example: Figure 50 This is a top view of an omnidirectional ceiling-mounted antenna, representing the ninth example of an embodiment of this disclosure; as shown... Figure 50 As shown, the reflector 2 in this example differs in structure from the reflector 2 described above. This reflector 2 not only includes a first reflecting part 21 and a second reflecting part 22, but also two second branches 23. Both second branches 23 are connected to the first reflecting part 21, but the connection nodes are different. Furthermore, the tangent at the intersection of the extension line of the orthographic projection of the radiating structure 1 onto the plate and the outer contour of the plate is in the same direction as the extension of the branches. This design method can further optimize the impedance matching of the antenna in the 900 MHz band.

[0152] Figure 51 and 52 The VSWR (Voltage Standing Wave Ratio) and gain of the designed antenna are given. The gain here is the gain value in the direction of maximum radiation of the antenna. It can be seen that the VSWR is <1.8 in the entire operating frequency range. The VSWR in the high-frequency part can be less than 1.5, but the VSWR is the largest in the 900 GHz band. Compared with the sixth example, the VSWR in the 1800 GHz band is slightly improved. The gain is greater than 1.8 dBi in all operating frequency bands, and meets the usage requirements of indoor distributed antennas in each frequency band. Figure 53a and 53b The horizontal two-dimensional radiation pattern of the designed antenna is presented, along with the difference between the maximum and minimum gain values ​​for each curve. The non-circularity of the pattern is less than 0.3 within the 900 MHz band and less than 1.4 in the other bands. Compared to Example 1, the antenna gain remains essentially unchanged, but the non-circularity in the high-frequency range deteriorates. The impedance matching of the designed antenna across the entire operating frequency range is shown below. Figure 54 The original Smith graph provided shows that, compared to Figure 39 In comparison, the 900 MHz band shifts significantly to the right, resulting in poorer overall convergence and worse low-frequency impedance matching, which can also be verified by VSWR.

[0153] In some examples, regardless of which of the above structures the antenna in the embodiments of this disclosure adopts, the reflector 2 may be a non-transparent metal plate structure or a transparent conductive mesh structure. Figure 55 This is a schematic diagram of another omnidirectional ceiling antenna structure according to an embodiment of the present disclosure; Figure 56 for Figure 55 Exploded view of an omnidirectional ceiling antenna; such as Figure 55 and 56 As shown, to improve antenna concealment, the reflector 2 in this embodiment uses a conductive mesh structure, specifically the same conductive mesh structure as the first main body 1221 of the radiating part 122. In this case, the reflector 2 includes a second dielectric substrate 210 and a reflective layer 220 disposed on the second dielectric substrate 210, the reflective layer 220 employing a conductive mesh structure. The first dielectric substrate 11 of the radiating structure 1 is fixedly connected to the second dielectric substrate 210, thereby fixing the reflector 2 to the radiating structure 1.

[0154] In some examples, the second dielectric substrate 210 can be made of the same material as the first dielectric substrate 11, and its thickness can be around 3 mm.

[0155] Figure 57 and 58 The VSWR (Voltage Standing Wave Ratio) and gain of the designed antenna are given. The gain here is the gain value in the direction of maximum radiation of the antenna. It can be seen that the VSWR is <1.8 in the entire operating frequency range, and the VSWR in the high-frequency part can be less than 1.5. In the 900 GHz band, the gain is greater than 2 dBi, and in the 1800-D band, the antenna gain reaches 3.6-6.5 dBi, all of which meet the bidding requirements of traditional single-polarized ceiling antennas. Figure 59a and 59b The horizontal two-dimensional radiation pattern of the designed antenna is given. The circularity in the 900MHz band is less than 1.0. The non-circularity deteriorates to some extent in the high-frequency part, but it is still less than 1.5, which fully meets the requirements of traditional single-polarized ceiling antennas.

[0156] In one example Figure 60 This is a schematic diagram showing the connection between the radiating structure 1 and the reflector 2 of an omnidirectional ceiling antenna according to an embodiment of this disclosure; as shown Figure 60 As shown, the reflector 2 and the radiating structure 1 are connected by at least one first connecting structure 4. The first connecting structure 4 can be an L-shaped connection structure, specifically including a first connecting component 41 and a second connecting component 42 connected to each other. The first connecting component 41 is connected to the first dielectric substrate 11, and the second connecting component 42 is connected to the reflector 2. This example achieves the connection between the reflector 2 and the radiating structure 1. In this embodiment, to ensure a stable connection between the reflector 2 and the radiating structure 1, it is preferable to use two first connecting structures 4 to connect the reflector 2 and the radiating structure 1, and the two first connecting structures 4 are symmetrically arranged. It should be noted that the number of first connecting structures 4 is not limited to two; the number of first connecting structures 4 can be specifically set according to the antenna size.

[0157] In another example, Figure 61 This is a schematic diagram of the end face of the first dielectric substrate 11 near the reflector 2 in an embodiment of this disclosure; Figure 62 This is a schematic diagram of another connection between the radiating structure 1 and the reflector 2 of the omnidirectional ceiling antenna according to an embodiment of the present disclosure; Figure 63 This is a schematic diagram of the radiating structure 1 and the reflector 2 of the omnidirectional ceiling antenna according to an embodiment of this disclosure; as shown Figures 61-63 As shown, a first connection hole 111 is formed on the end face of the first dielectric substrate 11 facing the reflector 2. A first connection component 41 extends from the side of the reflector 2 away from the radiating structure 1, through a second through-hole in the reflector 2, into the first connection hole and connects with it, thus connecting the reflector 2 and the radiating structure 1. For example, the first connection hole 111 is a threaded hole, and the first connection component 4 is a bolt. The bolt is screwed into the threaded hole to connect the reflector 2 and the radiating structure 1. Similar to the example above, the number of first connection components 4 in this example can be two. In this example, through the above connection method, the surface of the reflector 2 facing the radiating structure 1 is flat, thus improving the concealment of the antenna.

[0158] In another example, Figure 64 This is a schematic diagram of the end face of the first dielectric substrate 11 near the reflector 2 in an embodiment of this disclosure; Figure 65 This is a schematic diagram of the reflector 2 near the radiating structure 1 according to an embodiment of the present disclosure; Figure 66 This is another schematic diagram showing the connection between the radiating structure 1 and the reflector 2 of the omnidirectional ceiling antenna according to an embodiment of this disclosure; as shown Figures 64-66 As shown, the first connection structure 4 includes a first connection component 41 and a second connection component 42. The first connection component 41 is connected to the end face of the first dielectric substrate 11 and has a first connection hole 111. The reflector 2 has a second through hole 24 extending along its thickness direction. The first connection component 41 passes through the second through hole 24, and the second connection component 42 is connected to the first connection hole 111 to fix the first dielectric substrate 11 and the reflector 2, thereby realizing the connection between the reflector 2 and the radiating structure 1. The first connection through hole 111 can be a threaded hole, and the second connection component 42 can be a bolt. In this case, the bolt is screwed into the threaded hole, thereby realizing the connection between the reflector 2 and the radiating structure 1. Similar to the example above, the number of first connection structures 4 in this example can be two. In this example, since the first connection component 41 passes through the second through hole 24 of the reflector 2, the surface of the reflector 2 facing the radiating structure 1 is flat, thus improving the concealment of the antenna.

[0159] In another example, Figure 67 This is another schematic diagram showing the connection between the radiating structure 1 and the reflector 2 of the omnidirectional ceiling antenna according to an embodiment of this disclosure; as shown Figure 67As shown, a first receiving portion 25 is formed on the surface of the reflector 2 facing away from the radiation structure 1, and the reflector 2 has a third groove 26 extending through its thickness direction. The radiation structure 1 can pass through the third groove 26. The first connecting structure 4 includes a first connecting component 41 and a second connecting component 42. The first connecting component 41 connects to the end face of the radiation structure 1 near the reflector 2 and is installed in the first receiving portion 25, fitting the first receiving portion. The second connecting component 42 connects to the first connecting hole 111 in the first receiving portion through a third through hole 411 penetrating the first connecting component 41. For example, the second connecting component 42 is a bolt, and the first connecting hole 251 is a threaded hole. The bolt is screwed into the threaded hole, thereby realizing the connection between the reflector 2 and the radiation structure 1. The third through hole 411 and the first connecting hole 111 are arranged in a one-to-one correspondence. Preferably, there are four third through holes 411 and four first connecting holes 111, and the four third through holes 411 are arranged in an array, and the corresponding first connecting holes are also arranged in an array.

[0160] In some examples, the antenna of this disclosure embodiment includes not only the structure described above, but also a feeding structure, which specifically can transmit a cable. The transmission cable includes two transmission ends, one end connected to the radiating structure 1 is called the first transmission end, and the other end is called the second transmission end. The second transmission end can be connected to an N-type female connector for connection to an external device. Figure 68 This is a schematic diagram showing the connection between the transmission cable and the second connection structure according to an embodiment of this disclosure; Figure 69 This is a schematic diagram showing the connection between the transmission cable and the reflector 2 in an embodiment of this disclosure; as shown Figure 68 and 69 As shown, specifically, the transmission cable has, from inner to outer layers, a core 31, an interlayer dielectric layer, a shielding layer 32, and a protective layer. The core 31 is primarily used for signal transmission; therefore, it is the core 31 of the transmission cable that is electrically connected to the radiating structure 1. That is, the core 31 at the first transmission end of the transmission cable is exposed. In this case, the first transmission end passes through the first through-hole of the reflector 2, allowing the core 31 to connect with the radiating structure 1. The shielding layer 32 of the transmission cable can be connected to the reflector 2. At this time, the shielding layer at the first transmission end can be exposed, and a second connecting structure 5 is fitted over the exposed shielding layer. The second connecting structure 5 is then fixedly connected to the reflector 2. This achieves both the fixing of the transmission cable to the reflector 2 and the connection of the shielding layer to the reflector 2. It should be noted that a portion of the second connecting structure 5 rests against the side of the reflector 2 away from the radiating structure 1, while the other portion extends out of the first connecting through-hole. A nut can then be used to fix the second connecting structure 5, thus fixing the transmission cable to the reflector 2.

[0161] Furthermore, Figure 70 This is a schematic diagram of the third connection structure 6 according to an embodiment of this disclosure; as shown Figure 55 , 56 As shown in Figure 70, the omnidirectional ceiling antenna also includes a third connecting structure 6 that is fitted over the transmission cable. The third connecting structure 6 is fixedly connected to the reflector 2. The third connecting structure 6 is a connection structure that connects to the indoor roof. Specifically, the third connecting structure 6 includes a third connecting component 61 and a fourth connecting component 62; wherein, the third connecting component 61 has a hollow portion, and the fourth connecting component 62 has a first connecting through hole. The third connecting component 61 and the fourth connecting component 62 are connected, and the hollow portion communicates with the first connecting through hole. The third connecting structure 6 is fitted over the transmission cable through the hollow portion and the first connecting through hole, and the fourth connecting component 62 is fixed to the side of the reflector 2 facing away from the radiating structure 1. In one example, the third connecting component 61 can be a threaded post to facilitate fixing to the indoor roof. The threaded post can be made of ABS or PP material.

[0162] This disclosure provides an electronic device, which includes an antenna.

[0163] The antenna also includes a transceiver unit, an RF transceiver, a signal amplifier, a power amplifier, and a filtering unit. This antenna can function as either a transmitting or receiving antenna. The transceiver unit can include a baseband and a receiver. The baseband provides signals in at least one frequency band, such as 2G, 3G, 4G, or 5G signals, and transmits these signals to the RF transceiver. The transparent antenna in the communication system receives the signal, which is then processed by the filtering unit, power amplifier, signal amplifier, and RF transceiver (not shown in the diagram) before being transmitted to the receiver in the transceiver unit. The receiver could be, for example, a smart gateway.

[0164] Furthermore, the RF transceiver is connected to the transceiver unit and is used to modulate the signals transmitted by the transceiver unit, or to demodulate the signals received by the transparent antenna before transmitting them to the transceiver unit. Specifically, the RF transceiver may include a transmitting circuit, a receiving circuit, a modulation circuit, and a demodulation circuit. After the transmitting circuit receives various types of signals provided by the baseband, the modulation circuit can modulate the various types of signals provided by the baseband before transmitting them to the antenna. The transparent antenna receives the signals and transmits them to the receiving circuit of the RF transceiver. The receiving circuit then transmits the signals to the demodulation circuit, which demodulates the signals before transmitting them to the receiving end.

[0165] Furthermore, the RF transceiver is connected to a signal amplifier and a power amplifier, which are then connected to a filtering unit. The filtering unit is connected to at least one antenna. During signal transmission in the communication system, the signal amplifier improves the signal-to-noise ratio (SNR) of the RF transceiver's output signal before transmitting it to the filtering unit; the power amplifier amplifies the power of the RF transceiver's output signal before transmitting it to the filtering unit. The filtering unit may specifically include a duplexer and a filtering circuit. The filtering unit combines the signals output from the signal amplifier and power amplifier, filters out clutter, and transmits them to the transparent antenna, which radiates the signal. During signal reception in the communication system, the antenna receives the signal and transmits it to the filtering unit. The filtering unit filters out clutter from the received signal and transmits it to the signal amplifier and power amplifier. The signal amplifier increases the gain of the received signal, improving the SNR; the power amplifier amplifies the power of the received signal. The signal received by the antenna, after processing by the power amplifier and signal amplifier, is transmitted to the RF transceiver, which then transmits it to the transceiver unit.

[0166] In some examples, the signal amplifier may include various types of signal amplifiers, such as low-noise amplifiers, without limitation.

[0167] In some examples, the antenna provided in this disclosure also includes a power management unit connected to a power amplifier to provide voltage to the power amplifier for amplifying signals.

[0168] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An omnidirectional ceiling-mounted antenna, comprising a reflector and a radiating structure disposed on the reflector; the planes containing the reflector and the radiating structure have a certain angle; the radiating structure includes a first dielectric substrate and a radiating assembly disposed on the first dielectric substrate, the radiating assembly including a radiating portion; wherein, The radiating portion has at least one first groove, and the orthographic projection of the first groove onto the first dielectric substrate is spiral; and / or, The radiating component further includes at least one first branch disposed on the first dielectric substrate and coupled to the radiating portion.

2. The omnidirectional ceiling-mounted antenna according to claim 1, wherein, When the radiating part has at least one first groove, the number of first grooves is two, and the two first grooves are symmetrically arranged about a first reference line as an axis of symmetry; the first reference line is a straight line that passes through the feed point of the radiating part and extends in a direction perpendicular to the reflector.

3. The omnidirectional ceiling-mounted antenna according to claim 2, wherein, The first groove has a first end and a second end; the midpoint of the line connecting the second ends of the two first grooves is the first midpoint; The radiating part also has a second groove, the center of which coincides with the first midpoint.

4. The omnidirectional ceiling-mounted antenna according to claim 3, wherein, The orthographic projection of the second groove onto the first dielectric substrate is a circle or a rectangle.

5. The omnidirectional ceiling-mounted antenna according to claim 1, wherein, The radiating part includes a first main body and a first connecting part connected to the first main body; the feed point of the radiating part is located at the first connecting part; the first main body includes a conductive mesh.

6. The omnidirectional ceiling-mounted antenna according to claim 5, wherein, The first main body has a first window recessed toward its center, and the first connecting portion is connected to the first window and extends in a direction away from the center of the first main body.

7. The omnidirectional ceiling-mounted antenna according to claim 5, wherein, The radiating part further includes multiple impedance transformation bands, which connect the first main body and the first connecting part; and the multiple impedance transformation bands are symmetrically arranged with the extension direction of the connecting part as the axis of symmetry.

8. The omnidirectional ceiling-mounted antenna according to any one of claims 1-7, wherein, The reflector is divided into a first reflective part and a second reflective part, and the radiation structure is located on the dividing line between the first reflective part and the second reflective part; One of the first reflective portion and the second reflective portion has at least one slit opening extending through its thickness direction.

9. The omnidirectional ceiling-mounted antenna according to claim 8, wherein, The number of slit openings is multiple; When the first reflective part has the slit opening, the slit opening extends in a direction away from the second reflective part, and the portions of the plurality of slit openings are staggered. When the second reflective portion has the slit opening, the slit opening extends in a direction away from the first reflective portion, and the portions of the plurality of slit openings are staggered.

10. The omnidirectional ceiling-mounted antenna according to claim 8, wherein, The number of slit openings is multiple; When the first reflective part has the slit opening, the slit opening extends in a direction away from the second reflective part, and the plurality of slit openings form a comb-like structure; When the second reflective portion has the slit opening, the slit opening extends in a direction away from the first reflective portion, and the plurality of slit openings form a comb-like structure.

11. The omnidirectional ceiling-mounted antenna according to any one of claims 1-7, wherein, The reflector is divided into a first reflective portion and a second reflective portion, and the radiation structure is located on the dividing line between the first reflective portion and the second reflective portion; the first reflective portion and the second reflective portion have different patterns.

12. The omnidirectional ceiling-mounted antenna according to claim 11, wherein, The outline of one of the first reflective part and the second reflective part is semi-circular, and the outline of the other is triangular.

13. The omnidirectional ceiling-mounted antenna according to any one of claims 1-7, wherein, The reflector is divided into a first reflective portion and a second reflective portion, and the radiation structure is located on the boundary line between the first reflective portion and the second reflective portion; the reflector also includes: two second branches; Both second branches are connected to the first reflective part, but the connection nodes are different; or, both second branches are connected to the second reflective part, but the connection nodes are different.

14. The omnidirectional ceiling-mounted antenna according to claim 13, wherein, The tangent at the intersection of the extension of the orthographic projection of the radiating structure onto the reflector and the outer contour of the reflector is in the same direction as the extension of the second branch.

15. The omnidirectional ceiling-mounted antenna according to any one of claims 1-7, wherein, The reflector is divided into a first reflective part and a second reflective part, and the radiation structure is located on the dividing line between the first reflective part and the second reflective part; One of the first reflective portion and the second reflective portion includes a second main body portion and a second connecting portion; the second main body portion has a second window recessed inward toward the boundary line between the first reflective portion and the second reflective portion, and the second connecting portion is connected to the second window.

16. The omnidirectional ceiling-mounted antenna according to claim 15, wherein, The second connecting portion includes a first part and a second part; the first part is connected to the second window and extends in a direction away from the boundary line between the first reflective portion and the second reflective portion, and the second part is connected to the first part; the second part and the second window do not overlap in the orthographic projection of the second part onto the plane where the reflector is located.

17. The omnidirectional ceiling-mounted antenna according to claim 16, wherein, The second part includes a first side and a second side that are set opposite to each other, and a third side and a fourth side that connect the first side and the second side; the first part connects to the first side, and the length of the second side is not greater than that of the first side, and the third side and the fourth side are curved sides.

18. The omnidirectional ceiling-mounted antenna according to any one of claims 1-7, wherein, The reflector includes a second dielectric substrate and a reflective layer disposed on the side of the second dielectric substrate facing the radiation structure; the reflective layer includes a conductive mesh.

19. The omnidirectional ceiling-mounted antenna according to any one of claims 1-7, wherein, It also includes a power feeding structure configured to power the radiating section.

20. The omnidirectional ceiling-mounted antenna according to claim 19, wherein, The power supply structure includes a transmission cable; the transmission cable includes a first transmission end and a second transmission end; the first transmission end passes through the first via and is connected to the radiation structure, and the shielding layer of the transmission cable is fixedly connected to the reflector at the first transmission end position through a second connection structure.

21. The omnidirectional ceiling-mounted antenna according to any one of claims 1-7, wherein, The reflector is connected to the radiation structure via at least one first connection structure; The first connection structure includes a first connection component and a second connection component that are interconnected; the first connection component is connected to the first dielectric substrate, and the second connection component is connected to the reflector.

22. The omnidirectional ceiling-mounted antenna according to any one of claims 1-7, wherein, The reflector is connected to the radiation structure via at least one first connection structure; The first dielectric substrate has a first connection hole on the end face near the radiating structure. The first connection portion is connected to the first connection hole via a second through hole penetrating the radiating structure on the side of the reflector away from the radiating structure.

23. The omnidirectional ceiling-mounted antenna according to any one of claims 1-7, wherein, The reflector is connected to the radiation structure via at least one first connection structure; The first connection structure includes a first connection component and a second connection component. The first connection component is connected to the end face of the first dielectric substrate and has a first connection hole. The reflector has a second through hole extending along its thickness direction. The first connection component passes through the second through hole, and the second connection component is connected to the first connection hole to fix the first dielectric substrate and the reflector.

24. The omnidirectional ceiling-mounted antenna according to any one of claims 1-7, wherein, The reflector is connected to the radiation structure via a first connection structure; the first connection structure includes a first connection component and a second connection component. The reflector has a first receiving portion on the side opposite to the radiating structure, and the reflector has a third groove extending through its thickness direction; the radiating structure can pass through the third groove, the first connecting component connects to the end face of the radiating structure near the reflector and is installed in the first receiving portion, and is adapted to the first receiving portion, and the second connecting component connects to the first connecting hole in the first receiving portion through a third through hole penetrating the first connecting component.

25. An electronic device comprising the omnidirectional ceiling antenna according to any one of claims 1-24.

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