Omnidirectional antenna assembly and electronic equipment

Abstract

The utility model provides an omnidirectional antenna assembly and an electronic device so as to avoid the reduction of the influence of a metal plate on the radiation pattern and efficiency of an antenna structure, and equivalent magnetic dipoles generate horizontal polarization radiation. In the omnidirectional antenna assembly provided by the utility model, the metal plate and the antenna structure are arranged on the same side of the circuit board, the metal plate is used for realizing heat dissipation of the omnidirectional antenna assembly, the metal plate and the antenna structure are adjacently arranged in the direction parallel to the circuit board, and the projection part of the antenna structure and the projection part of the circuit board coincide. The antenna structure can be exposed while the metal plate can dissipate heat of the antenna structure, so that the influence of the metal plate on the radiation pattern and efficiency of the antenna structure is reduced, and the radiation pattern and efficiency of the antenna structure and the metal plate are improved. The electronic equipment provided by the embodiment of the invention is fiber to the room (Fiber To Room, short for FTTR), so that bidirectional communication between the user equipment and the communication system can be realized.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of antenna technology, and specifically to an omnidirectional antenna assembly and electronic equipment. Background Art

[0002] The antenna assembly includes a circuit board and an antenna structure printed on the circuit board, and a heat dissipation structure for dissipating heat from the antenna assembly. The heat dissipation structure covers the circuit board, which affects the radiation pattern and efficiency of the antenna structure on the circuit board. Utility Model Content

[0003] The embodiments of the present application provide an omnidirectional antenna assembly and an electronic device, which are intended to reduce the influence of the metal plate on the radiation pattern and efficiency of the antenna structure, and to generate horizontally polarized radiation using an equivalent magnetic dipole.

[0004] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0005] On the one hand, an embodiment of the present application provides an omnidirectional antenna assembly, which includes a circuit board, at least one antenna structure, and a metal plate; the antenna structure is located on one side of the circuit board, the antenna structure is coupled to the circuit board, and a partial projection of the antenna structure on the circuit board overlaps with the circuit board; the metal plate and the antenna structure are arranged on the same side of the circuit board, the metal plate and the antenna structure are arranged adjacent to each other in a direction parallel to the circuit board, and the metal plate and the antenna structure are an integrated structure.

[0006] In the omnidirectional antenna assembly provided in the embodiment of the present application, the metal plate and the antenna structure are arranged on the same side of the circuit board, and the metal plate and the antenna structure are an integrated structure. The metal plate is used to achieve heat dissipation of the omnidirectional antenna assembly. The metal plate and the antenna structure are arranged adjacent to each other in a direction parallel to the circuit board. While the metal plate can achieve heat dissipation of the antenna structure, the antenna structure can also be exposed, thereby reducing the influence of the metal plate on the radiation pattern and efficiency of the antenna structure, thereby improving the radiation pattern and efficiency of the antenna structure and the metal plate (i.e., the omnidirectional antenna assembly).

[0007] At the same time, part of the projection of the antenna structure on the circuit board overlaps with the circuit board, that is, part of the antenna structure protrudes relative to the circuit board, so that the antenna structure can achieve omnidirectional coverage in the direction perpendicular to the circuit board, thereby expanding the coverage range of the structure.

[0008] In some embodiments, the antenna structure includes a first radiator, a second radiator and a third radiator, the second radiator is located between the first radiator and the circuit board, the third radiator connects the first radiator and the second radiator, and the first radiator and the second radiator are located on the same side of the third radiator; the first radiator, the second radiator and the third radiator are surrounded to form a radiation opening; the metal plate avoids the radiation opening.

[0009] In some embodiments, the metal plate and the second radiator are located in the same plane, and the metal plate is connected to the second radiator. Since the second radiator is closer to the circuit board than the first radiator, the connection between the metal plate and the second radiator can make the metal plate closer to the circuit board than the connection between the metal plate and the first radiator, which is convenient for the arrangement of the metal plate.

[0010] In some embodiments, the omnidirectional antenna assembly includes two antenna structures, the two antenna structures are respectively a first antenna structure and a second antenna structure, the first antenna structure and the second antenna structure are located on the same side of the circuit board, and the metal plate is located between the first antenna structure and the second antenna structure; the radiation opening of the first antenna structure faces back to the metal plate, and the radiation opening of the second antenna structure also faces back to the metal plate.

[0011] In this embodiment, the first antenna structure and the second antenna structure are arranged relative to each other, the radiation opening of the first antenna structure is facing away from the metal plate, and the radiation opening of the second antenna structure is also facing away from the metal plate. The radiation opening of the first antenna structure and the radiation opening of the second antenna structure are in opposite directions, which can improve the radiation pattern and efficiency of the antenna structure.

[0012] In some embodiments, the omnidirectional antenna assembly further includes a heat dissipation fin, which is located between the first antenna structure and the second antenna structure, and is connected to a side of the metal plate facing away from the circuit board to improve the heat dissipation efficiency of the metal plate through the heat dissipation fin.

[0013] In some embodiments, the omnidirectional antenna assembly further includes a feeding unit, a first feeding point is provided on the first radiator, a second feeding point is provided on the second radiator, and the feeding unit is used to feed the first feeding point and the second feeding point.

[0014] The antenna structure provided in the embodiment of the present application has two feeding points (a first feeding point and a second feeding point), and the working bandwidth of the antenna structure can be expanded by tuning different feeding points; the radiation pattern can also be controlled and the coverage range can be optimized by adjusting the feeding amplitude and phase.

[0015] In some embodiments, the feeding unit includes a screw and a nut, the screw is connected to the first feeding point, and the nut is connected to the second feeding point.

[0016] In the implementation mode where the feeding unit includes screws and nuts, since the impedance of the electrical connection is relatively high and the current transmission capability is relatively strong, it is suitable for low-frequency and high-current power supply.

[0017] In some embodiments, the feeding unit further includes a coaxial line, an inner conductor of the coaxial line is coupled to the first feeding point, and an outer conductor of the coaxial line is coupled to the second feeding point.

[0018] In the implementation mode where the feeding unit includes a coaxial line, since the outer conductor can be used as a shielding layer to effectively reduce electromagnetic interference, the impedance matching is good and it is suitable for high-frequency signal transmission.

[0019] In some embodiments, a resonant slot is provided on the first radiator, which can more effectively couple electromagnetic energy out of the first radiator, reduce energy loss inside the first radiator, and thus improve the radiation pattern and efficiency of the antenna structure.

[0020] In some embodiments, the resonant slot extends in a direction perpendicular to an arrangement direction of the antenna structure and the metal plate.

[0021] In some embodiments, the resonant slot includes a first slot, a second slot and a third slot, the first slot extends in a direction perpendicular to the arrangement direction of the antenna structure and the metal plate, the extension directions of the second slot and the third slot are both perpendicular to the extension direction of the first slot, and the second slot is connected to one end of the first slot, the third slot is connected to the other end of the first slot, and the second slot and the third slot are both located on the same side of the first slot.

[0022] In some embodiments, the first feeding point is located on the side of the resonant slot away from the third radiator, so as to shorten the distance between the first feeding point and the resonant slot, so that the current fed from the first feeding point can directly act on the edge of the slot, reduce the loss of the current on the first radiator, and improve the radiation pattern and efficiency of the antenna structure.

[0023] In some embodiments, the antenna assembly is a horizontally polarized antenna.

[0024] On the other hand, an embodiment of the present application further provides an electronic device, which includes a controller and an omnidirectional antenna assembly as described above, wherein the controller is coupled to the omnidirectional antenna assembly. The electronic device is a FTTR (Fiber To The Room) device. It can be understood that the beneficial effects that can be achieved by the electronic device can refer to the beneficial effects of the omnidirectional antenna assembly described above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present application, the following is a brief introduction to the drawings required for use in some embodiments of the present application. Obviously, the drawings described below are only drawings of some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not intended to limit the actual size of the product involved in the embodiments of the present application, the actual process of the method, the actual timing of the signal, etc.

[0026] Figure 1 is a block diagram of an electronic device in an embodiment of the present application;

[0027] Figure 2 The structure of the omnidirectional antenna assembly in the embodiment of the present application is shown in FIG. Figure 1 ;

[0028] Figure 3 This is a schematic diagram of the structure of the antenna in the embodiment of the present application;

[0029] Figure 4 for Figure 2 A side view of a first embodiment;

[0030] Figure 5 for Figure 2 A side view of a second embodiment;

[0031] Figure 6 for Figure 2 A side view of a third embodiment;

[0032] Figure 7 for Figure 2 A side view of a fourth embodiment;

[0033] Figure 8 The structure of the omnidirectional antenna assembly in the embodiment of the present application is shown in FIG. Figure 2 ;

[0034] Fig. 9 The structure of the omnidirectional antenna assembly in the embodiment of the present application is shown in FIG. Figure 3 ;

[0035] Fig.10 for Fig. 9 Side view of

[0036] Fig.11 The S parameter performance curves of the first antenna structure and the second antenna structure in the embodiment of the present application are as follows: Figure 1 ;

[0037] Fig.12 The S parameter performance curves of the first antenna structure and the second antenna structure in the embodiment of the present application are as follows: Figure 2 ;

[0038] Fig.13 The S parameter performance curves of the first antenna structure and the second antenna structure in the embodiment of the present application are as follows: Figure 3 .

[0039] Explanation of the reference numerals: 100, electronic device; 10, omnidirectional antenna assembly; 20, controller; 110, antenna structure; 111, first radiator; 101, first feeding point; 102, second feeding point; 112, second radiator; 113, third radiator; 114, radiation opening; 120, circuit board; 130, metal plate; 140, feeding unit; 141, screw; 150, resonant slot; 160, heat dissipation fin; 171, first antenna structure; 172, second antenna structure. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiment is a gap embodiment of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0042] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left", "right", "horizontal" and "vertical" are defined relative to the orientation of the components schematically placed in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to changes in the orientation of the components placed in the drawings.

[0043] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0044] It should be noted that in the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or an integral connection; it can also be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0045] The following explains the terms that may appear in the embodiments of the present application.

[0046] Coupling: can be understood as direct coupling and / or indirect coupling, and "coupled connection" can be understood as direct coupling connection and / or indirect coupling connection. Direct coupling can also be called "electrical connection", which is understood as the physical contact and electrical conduction between components; it can also be understood as the connection between different components in the circuit structure through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals; "indirect coupling" can be understood as two conductors being electrically conductive in an airless / non-contact manner. In one embodiment, indirect coupling can also be called capacitive coupling, for example, signal transmission is achieved by coupling between the gaps between two conductive parts to form an equivalent capacitor.

[0047] Radiator, or antenna branch: is a device in the antenna used to receive / send electromagnetic wave radiation. In some cases, the narrow sense of "antenna" is the radiator, which converts the waveguide energy from the transmitter into radio waves, or converts radio waves into waveguide energy, which is used to radiate and receive radio waves. The modulated high-frequency current energy (or waveguide energy) generated by the transmitter is transmitted to the transmitting radiator via the feeder line, and converted into a certain polarized electromagnetic wave energy by the radiator and radiated in the desired direction. The receiving radiator converts a certain polarized electromagnetic wave energy from a specific direction in space into modulated high-frequency current energy, which is transmitted to the receiver input via the feeder line.

[0048] The radiator (or antenna branch) may include a conductor with a specific shape and size, such as a linear or sheet shape, etc. The present application does not limit the specific shape. In one embodiment, the linear radiator may be referred to as a linear antenna. In one embodiment, the linear radiator may be implemented by a conductive frame, and may also be referred to as a frame antenna. In one embodiment, the linear radiator may be implemented by a bracket conductor, and may also be referred to as a bracket antenna. In one embodiment, the linear radiator, or the radiator of the linear antenna, has a wire diameter (for example, including thickness and width) much smaller than the wavelength (for example, the dielectric wavelength) (for example, less than 1 / 16 of the wavelength), and the length may be comparable to the wavelength (for example, the dielectric wavelength) (for example, the length is about 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). The main forms of linear antennas are dipole antennas, half-wave oscillator antennas, monopole antennas, loop antennas, and inverted F antennas (also known as IFA, Inverted F Antenna). For example, for a dipole antenna, each dipole antenna generally includes two radiating branches, and each branch is fed by a feeding unit from the feeding end of the radiating branch. For example, an inverted-F antenna (IFA) can be regarded as a monopole antenna with a ground path added. The IFA antenna has a feeding point and a grounding point, and is called an inverted-F antenna because its side view is an inverted F shape. In one embodiment, the sheet radiator may include a microstrip antenna, or a patch antenna, such as a planar inverted F antenna (also known as PIFA, Planar Inverted F Antenna). In one embodiment, the sheet radiator may be implemented by a planar conductor (such as a conductive sheet or a conductive coating). In one embodiment, the sheet radiator may include a conductive sheet, such as a copper sheet. In one embodiment, the sheet radiator may include a conductive coating, such as a silver paste. The shape of the sheet radiator includes a circle, a rectangle, a ring, etc., and the present application does not limit the specific shape. The structure of the microstrip antenna is generally composed of a dielectric substrate, a radiator and a floor, wherein the dielectric substrate is arranged between the radiator and the floor.

[0049] The radiator (or antenna branch) may also include a slot or a slit formed on the conductor, for example, a closed or semi-closed slot or slit formed on the grounded conductor surface. In one embodiment, a slotted or slitted radiator may be referred to as a slot antenna or a slot antenna. In one embodiment, the radial dimension (for example, including the width) of the slot or slit of the slot antenna / slot antenna is much smaller than the wavelength (for example, the dielectric wavelength) (for example, less than 1 / 16 of the wavelength), and the length dimension may be comparable to the wavelength (for example, the dielectric wavelength) (for example, the length is about 1 / 8 of the wavelength, or 1 / 8 to 1 / 4, or 1 / 4 to 1 / 2, or longer). In one embodiment, a radiator with a closed slot or slit may be referred to as a closed slot antenna. In one embodiment, a radiator with a semi-closed slot or slit (for example, an opening is added to a closed slot or slit) may be referred to as an open slot antenna. In some embodiments, the slot shape is a long strip. In some embodiments, the length of the slot is about half a wavelength (for example, the dielectric wavelength). In some embodiments, the length of the slot is about an integer multiple of the wavelength (for example, one times the dielectric wavelength). In some embodiments, the slot can be fed by a transmission line connected across one or both sides thereof, thereby exciting a radio frequency electromagnetic field on the slot and radiating electromagnetic waves into space. In one embodiment, the radiator of the slot antenna or slot antenna can be realized by a conductive frame with both ends grounded, which can also be called a frame antenna; in this embodiment, it can be regarded as that the slot antenna or slot antenna includes a linear radiator, which is spaced apart from the floor and grounded at both ends of the radiator, thereby forming a closed or semi-closed slot or slot. In one embodiment, the radiator of the slot antenna or slot antenna can be realized by a bracket conductor with both ends grounded, which can also be called a bracket antenna.

[0050] The feed line, also called the transmission line, refers to the connection line between the antenna's transceiver and the radiator. The transmission line can directly transmit current waves or electromagnetic waves depending on the frequency and form. The connection point on the radiator where the transmission line is connected is usually called the feeding point. Transmission lines include wire transmission lines, coaxial transmission lines, waveguides, or microstrip lines. Depending on the implementation form, the transmission line can include a bracket antenna body, a glass antenna body, etc. Depending on the carrier, the transmission line can be implemented by LCP (Liquid Crystal Polymer), FPC (Flexible Printed Circuit), or PCB (Printed Circuit Board).

[0051] Ground / floor: It can refer to at least a part of any grounding layer, grounding plate, or grounding metal layer in an electronic device (such as a mobile phone), or at least a part of any combination of any of the above grounding layers, grounding plates, or grounding components, etc. "Ground / floor" can be used for grounding components in electronic devices. In one embodiment, the "ground / floor" may include any one or more of the following: the grounding layer of the circuit board of the electronic device, the grounding plate formed by the middle frame of the electronic device, the grounding metal layer formed by the metal film under the screen, the conductive grounding layer of the battery, and the conductive parts or metal parts electrically connected to the above grounding layer / grounding plate / metal layer. In one embodiment, the circuit board may be a printed circuit board (PCB), such as an 8-layer, 10-layer or 12-14-layer board having 8, 10, 12, 13 or 14 layers of conductive material, or an element separated and electrically insulated by a dielectric layer or insulating layer such as glass fiber, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a grounding layer and a wiring layer, and the wiring layer and the grounding layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, input buttons, a transmitter, a processor, a memory, a battery, a charging circuit, a system on chip (SoC) structure, etc. can be mounted on or connected to a circuit board; or electrically connected to a wiring layer and / or a ground layer in the circuit board. For example, a radio frequency source is disposed on the wiring layer.

[0052] Any of the above-mentioned grounding layers, grounding plates, or grounding metal layers are made of conductive materials. In one embodiment, the conductive material can be any of the following materials: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, graphite-coated substrates, copper-plated substrates, brass-plated substrates, and aluminum-plated substrates. It will be appreciated by those skilled in the art that the grounding layer / grounding plate / grounding metal layer can also be made of other conductive materials.

[0053] Grounding: refers to coupling with the above-mentioned ground / floor through a grounding structure and / or a grounding circuit. In one embodiment, grounding can be achieved through physical grounding, such as physical grounding (or physical ground) at a specific position on the frame through some structural parts of the middle frame. In one embodiment, grounding can be achieved through device grounding, such as grounding through devices such as capacitors / inductors / resistors connected in series or in parallel (or device ground).

[0054] Resonant frequency: The resonant frequency is also called the resonance frequency. The resonant frequency can have a frequency range, that is, the frequency range in which resonance occurs. The resonant frequency can be a frequency range in which the return loss characteristic is less than -6dB. The strongest point of resonance can be called the resonance point, and the frequency corresponding to the resonance point is the center frequency point frequency. The return loss characteristic of the center frequency can be less than -20dB. It should be understood that, unless otherwise specified, the antenna / radiator mentioned in this application produces a "first / second... resonance", where the first resonance should be the fundamental mode resonance generated by the antenna / radiator, or the lowest frequency resonance generated by the antenna / radiator. It should be understood that the antenna / radiator can generate one or more antenna modes according to the specific design, and each antenna mode can correspond to a fundamental mode resonance.

[0055] Antenna system efficiency (total efficiency): refers to the ratio of input power to output power at the antenna port.

[0056] Antenna radiation efficiency: refers to the ratio of the power radiated by the antenna into space (i.e. the power of the electromagnetic wave part that is effectively converted) to the active power input to the antenna. Among them, the active power input to the antenna = the input power of the antenna - the loss power; the loss power mainly includes the return loss power and the ohmic loss power of the metal and / or the dielectric loss power. The radiation efficiency is a value that measures the radiation ability of the antenna. Metal loss and dielectric loss are both factors that affect the radiation efficiency.

[0057] Reference Figure 1 , an embodiment of the present application provides an electronic device 100, which includes an omnidirectional antenna assembly 10 and a controller 20 coupled to the omnidirectional antenna assembly 10, and the controller 20 is used to control the omnidirectional antenna assembly 10 to radiate electromagnetic waves to generate signals. Among them, the electronic device 100 may include wireless devices such as Wi-Fi routers, gateways, APs (Access Points), and FTTRs (Fiber To The Room). The electronic device provided in the embodiment of the present application can realize two-way communication between user equipment and a communication system, thereby realizing fiber to the room. The omnidirectional antenna assembly 10 in the electronic device 100 may include a vertically polarized antenna and a horizontally polarized antenna, and adopt MIMO (Multiple-Input, Multiple-Output) diversity technology to increase the overall polarization diversity of the omnidirectional antenna assembly 10, improve channel capacity and anti-interference capability, and thereby improve throughput performance and system stability.

[0058] Reference Figure 2In the above embodiment, the omnidirectional antenna assembly 10 includes an antenna structure 110 of a horizontally polarized antenna and a circuit board 120. The antenna structure 110 is located on one side of the circuit board 120, and the antenna structure 110 is coupled to the circuit board 120. The circuit board 120 serves as a ground plane in the omnidirectional antenna assembly 10, and the antenna structure 110 is grounded through the circuit board 120. The omnidirectional antenna assembly 10 also includes a metal plate 130. The metal plate 130 and the antenna structure 110 are arranged on the same side of the circuit board 120, and the metal plate 130 and the antenna structure 110 are an integral structure. The metal plate 130 is used to achieve heat dissipation of the omnidirectional antenna assembly 10. Compared to the antenna manufactured by laser direct structuring (LDS), the antenna is directly formed on the circuit board 120, and the heat sink for dissipating heat for the antenna covers the circuit board 120. In this embodiment, the metal plate 130 used to dissipate heat for the antenna is arranged adjacent to the antenna structure 110 in a direction parallel to the circuit board 120. While the metal plate 130 can dissipate heat for the antenna structure 110, the antenna structure 110 can also be exposed, thereby reducing the influence of the metal plate 130 on the radiation pattern and efficiency of the antenna structure 110, thereby improving the radiation pattern and efficiency of the antenna structure 110 and the metal plate 130 (i.e., the omnidirectional antenna assembly 10).

[0059] Reference Figure 2 and Figure 3 In some embodiments, the antenna structure 110 includes a first radiator 111, a second radiator 112 and a third radiator 113, wherein the first radiator 111 and the second radiator 112 both extend on a plane parallel to the circuit board 120, and the second radiator 112 is located between the first radiator 111 and the circuit board 120; the third radiator 113 extends on a plane perpendicular to the circuit board 120, the third radiator 113 connects the first radiator 111 and the second radiator 112, and the first radiator 111 and the second radiator 112 are both located on the same side of the third radiator 113, so that the first radiator 111, the second radiator 112 and the third radiator 113 can enclose a radiation opening 114.

[0060] In an embodiment in which the antenna structure 110 and the metal plate 130 are an integrated structure, the metal plate 130 can be connected to the first radiator 111, the second radiator 112, and the third radiator 113, but the metal plate 130 needs to avoid the radiation opening 114 formed by the first radiator 111, the second radiator 112 and the third radiator 113 to prevent the metal plate 130 from affecting the radiation pattern and efficiency of the antenna structure 110.

[0061] For example, refer to Figure 4In an embodiment where the metal plate 130 is connected to the first radiator 111 , the metal plate 130 is located on a side of the third radiator 113 away from the first radiator 111 . In this embodiment, the radiation opening 114 of the antenna structure 110 faces away from the metal plate 130 .

[0062] Reference Figure 5 In an embodiment where the metal plate 130 is connected to the second radiator 112, the metal plate 130 may be located on a side of the third radiator 113 away from the second radiator 112. In this embodiment, the radiation opening 114 of the antenna structure 110 faces away from the metal plate 130. Figure 6 In another embodiment in which the metal plate 130 is connected to the second radiator 112, the metal plate 130 and the second radiator 112 may be located on the same side of the third radiator 113, for example, the second radiator 112 is located between the metal plate 130 and the third radiator 113. In this embodiment, the radiation opening 114 of the antenna structure 110 faces the metal plate 130.

[0063] In the above two embodiments, since the second radiator 112 is closer to the circuit board 120 than the first radiator 111, the connection between the metal plate 130 and the second radiator 112 can make the metal plate 130 closer to the circuit board 120 than the connection between the metal plate 130 and the first radiator 111, which facilitates the installation of the metal plate 130.

[0064] Reference Figure 7 In an embodiment where the metal plate 130 is connected to the third radiator 113 , the metal plate 130 is located on a side of the third radiator 113 away from the first radiator 111 and the second radiator 112 . In this embodiment, the radiation opening 114 of the antenna structure 110 faces away from the metal plate 130 .

[0065] Continue to refer to Figure 3 In the above embodiment, the omnidirectional antenna assembly 10 further includes a feeding unit 140, a first feeding point 101 is provided on the first radiator 111, a second feeding point 102 is provided on the second radiator 112, and the feeding unit 140 is used to feed the first feeding point 101 and the second feeding point 102. Compared with the antenna structure 110 with a single feeding point, the antenna structure 110 provided in the embodiment of the present application has two feeding points (the first feeding point 101 and the second feeding point 102), and the working bandwidth of the antenna structure 110 can be expanded by tuning different feeding points; the radiation pattern can also be controlled by adjusting the feeding amplitude and phase to optimize the coverage range.

[0066] In some embodiments, the feed unit 140 may include a screw 141 and a nut 142, wherein the screw 141 is connected to the first feed point 101, and the nut 142 is connected to the second feed point 102; illustratively, the nut 142 is located on the side of the second radiator 112 away from the first radiator 111, and fits the second feed point 102 on the second radiator 112, the screw 141 passes through the nut 142 and the second radiator 112 and is connected to the first feed point 101 on the first radiator 111, and the screw 141 and the nut 142 are matched to connect to ensure that the screw 141 is in contact with the first feed point 101, and the nut 142 is in contact with the second feed point 102; wherein the connection between the screw 141 and the nut 142 is insulated. In the embodiment where the feed unit 140 includes the screw 141 and the nut 142, since the impedance of the electrical connection is high and the ability to transmit current is strong, it is suitable for low-frequency and high-current power supply.

[0067] In other embodiments, the feeding unit 140 may include a coaxial line (not shown), the coaxial line having an inner conductor and an outer conductor, the inner conductor of the coaxial line being coupled to the first feeding point 101, and the outer conductor of the coaxial line being coupled to the second feeding point 102. In the embodiment where the feeding unit 140 includes a coaxial line, since the outer conductor can be used as a shielding layer to effectively reduce electromagnetic interference, the impedance matching is good, and it is suitable for high-frequency signal transmission.

[0068] In some embodiments, a resonant slot 150 may be provided on the first radiator 111, and the resonant slot 150 may couple electromagnetic energy out of the first radiator 111 more effectively, reduce energy loss inside the first radiator 111, and thereby improve the radiation pattern and efficiency of the antenna structure 110. In conjunction with the above-mentioned embodiment of the connection between the metal plate 130 and the antenna structure 110, the metal plate 130 should not block the resonant slot 150 provided on the first radiator 111 after being connected to any one of the first radiator 111, the second radiator 112, and the third radiator 113.

[0069] Reference Figure 2 In the above embodiment, the resonant slot 150 may extend in a direction perpendicular to the arrangement direction of the antenna structure 110 and the metal plate 130; or, referring to Figure 8 The resonant slot 150 may include a first slot 151, a second slot 152 and a third slot 153, wherein the first slot 151 extends in a direction perpendicular to the arrangement direction of the antenna structure 110 and the metal plate 130, the extension directions of the second slot 152 and the third slot 153 are both perpendicular to the extension direction of the first slot 151, and the second slot 152 is connected to one end of the first slot 151, the third slot 153 is connected to the other end of the first slot 151, and the second slot 152 and the third slot 153 are both located on the same side of the first slot 151.

[0070] Reference Figure 3 In the above embodiment, the first feeding point 101 is located on the side of the resonant slot 150 away from the third radiator 113 to shorten the distance between the first feeding point 101 and the resonant slot 150, so that the current fed from the first feeding point 101 can directly act on the edge of the resonant slot 150, reduce the current loss on the first radiator 111, and improve the radiation pattern and efficiency of the antenna structure 110.

[0071] In some embodiments, reference Figure 2 , a partial projection of the antenna structure 110 on the circuit board 120 coincides with the circuit board 120, that is, a portion of the antenna structure 110 protrudes relative to the metal plate 130, so that the antenna structure 110 can achieve omnidirectional coverage in a direction perpendicular to the circuit board 120, thereby expanding the coverage range of the structure.

[0072] Reference Fig. 9 and Fig.10 In some embodiments, the omnidirectional antenna assembly 10 may include two antenna structures and a metal plate 130, the two antenna structures are respectively a first antenna structure 171 and a second antenna structure 172, the first antenna structure 171, the second antenna structure 172 and the metal plate 130 are all located on the same side of the circuit board 120, and the metal plate 130 is connected to the first antenna structure 171 and the second antenna structure 172, and the metal plate 130 is located between the first antenna structure 171 and the second antenna structure 172; wherein the first antenna structure 171 and the second antenna structure 172 are both connected to the above-mentioned antenna structure 110 (such as Figure 3 The structures of the first antenna structure 171 and the second antenna structure 172 are the same as those of the first antenna structure 171 and the second antenna structure 172 (for example, the first antenna structure 171 includes a first radiator, a second radiator and a third radiator, and the second antenna structure 172 also includes a first radiator, a second radiator and a third radiator). In this embodiment, the first antenna structure 171 and the second antenna structure 172 are arranged opposite to each other, the radiation opening of the first antenna structure 171 faces away from the metal plate 130, and the radiation opening of the second antenna structure 172 also faces away from the metal plate 130. The radiation opening of the first antenna structure 171 and the radiation opening of the second antenna structure 172 are in opposite directions, which can improve the radiation pattern and efficiency of the antenna structure 110.

[0073] Continue to refer to Fig. 9 and Fig.10 In the above embodiment, a partial projection of the first antenna structure 171 on the circuit board 120 overlaps with the circuit board 120, and a partial projection of the second antenna structure 172 on the circuit board 120 overlaps with the circuit board 120. The beneficial effects that can be achieved are the same as those described in the previous embodiment and will not be repeated here.

[0074] Continue to refer to Fig. 9 and Fig.10In the above embodiment, the omnidirectional antenna assembly 10 may also include a heat dissipation fin 160, which is also arranged on the side of the metal plate 130 away from the circuit board 120 to improve the heat dissipation efficiency of the omnidirectional antenna assembly 10, wherein the heat dissipation fin 160 is located between the first antenna structure 171 and the second antenna structure 172. Since the radiation opening of the first antenna structure 171 is facing away from the metal plate 130, the radiation opening of the second antenna structure 172 is also facing away from the metal plate 130. It can be understood that the radiation opening of the first antenna structure 171 and the radiation opening of the second antenna structure 172 are both facing away from the heat dissipation fin 160, and the heat dissipation fin 160 will not affect the radiation pattern and efficiency of the first antenna structure 171 and the second antenna structure 172.

[0075] In an embodiment where two feeding points are provided on the first antenna structure 171 and two feeding points are provided on the second antenna structure 172, Fig.11 is the S parameter performance curve of the first antenna structure 171 and the second antenna structure 172 Figure 1 , L1 is the S11 curve of the first antenna structure 171 , and L2 is the S22 curve of the second antenna structure 172 , indicating that both the first antenna structure 171 and the second antenna structure 172 have two resonant frequencies and improve the bandwidth of the omnidirectional antenna assembly 10 .

[0076] Combination Fig.11 , Fig.12 is the S parameter performance curve of the first antenna structure 171 and the second antenna structure 172 Figure 2 , L3 is the curve of the port impedance bandwidth of the first antenna structure 171 , and L4 is the curve of the port impedance bandwidth of the second antenna structure 172 , indicating that between the two resonant frequencies of the first antenna structure 171 and the second antenna structure 172 , the omnidirectional antenna assembly 10 has better impedance characteristics.

[0077] Combination Fig.11 , Fig.13 is the S parameter performance curve of the first antenna structure 171 and the second antenna structure 172 Figure 3 , L5 is the total efficiency of the first antenna structure 171 , and L6 is the total efficiency of the first antenna structure 171 and the second antenna structure 172 , indicating that between the two resonant frequencies of the first antenna structure 171 and the second antenna structure 172 , the omnidirectional antenna assembly 10 has a better total efficiency.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace the gaps or all the technical features therein with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An omnidirectional antenna assembly, characterized in that: include: Circuit boards; An antenna structure, the antenna structure is located on one side of the circuit board, the antenna structure is coupled to the circuit board, and a partial projection of the antenna structure on the circuit board overlaps with the circuit board; A metal plate, wherein the metal plate and the antenna structure are arranged on the same side of the circuit board, the metal plate and the antenna structure are arranged adjacent to each other in a direction parallel to the circuit board, and the metal plate and the antenna structure are an integral structure.

2. The omnidirectional antenna assembly according to claim 1, characterized in that: The antenna structure comprises a first radiator, a second radiator and a third radiator, wherein the second radiator is located between the first radiator and the circuit board, the third radiator connects the first radiator and the second radiator, and the first radiator and the second radiator are located on the same side of the third radiator; The first radiator, the second radiator and the third radiator are surrounded to form a radiation opening; The metal plate avoids the radiation opening.

3. The omnidirectional antenna assembly according to claim 2, characterized in that: The metal plate and the second radiator are located in the same plane, and the metal plate is connected to the second radiator.

4. The omnidirectional antenna assembly according to claim 2, characterized in that: The omnidirectional antenna assembly includes two antenna structures, the two antenna structures are respectively a first antenna structure and a second antenna structure, the first antenna structure and the second antenna structure are located on the same side of the circuit board, and the metal plate is located between the first antenna structure and the second antenna structure; The radiation opening of the first antenna structure faces away from the metal plate, and the radiation opening of the second antenna structure also faces away from the metal plate.

5. The omnidirectional antenna assembly according to claim 4, characterized in that: The omnidirectional antenna assembly further includes a heat dissipation fin, which is located between the first antenna structure and the second antenna structure, and is connected to a side of the metal plate that is away from the circuit board.

6. The omnidirectional antenna assembly according to any one of claims 2 to 5, characterized in that: The omnidirectional antenna assembly further includes a feeding unit. A first feeding point is provided on the first radiator, and a second feeding point is provided on the second radiator. The feeding unit is used to feed the first feeding point and the second feeding point.

7. The omnidirectional antenna assembly according to claim 6, characterized in that: The feeding unit includes a screw and a nut, the screw is connected to the first feeding point, and the nut is connected to the second feeding point.

8. The omnidirectional antenna assembly according to claim 6, characterized in that: The feeding unit further includes a coaxial line, an inner conductor of the coaxial line is coupled to the first feeding point, and an outer conductor of the coaxial line is coupled to the second feeding point.

9. The omnidirectional antenna assembly according to claim 6, characterized in that: The first radiator is provided with a resonant slot.

10. The omnidirectional antenna assembly according to claim 9, characterized in that: The resonant slot extends in a direction perpendicular to an arrangement direction of the antenna structure and the metal plate.

11. The omnidirectional antenna assembly according to claim 9, characterized in that: The resonant slot includes a first slot, a second slot and a third slot, the first slot extends in a direction perpendicular to the arrangement direction of the antenna structure and the metal plate, the extension directions of the second slot and the third slot are both perpendicular to the extension direction of the first slot, and the second slot is connected to one end of the first slot, the third slot is connected to the other end of the first slot, and the second slot and the third slot are both located on the same side of the first slot.

12. The omnidirectional antenna assembly according to claim 9, characterized in that: The first feeding point is located on a side of the resonant slot away from the third radiator.

13. The omnidirectional antenna assembly according to claim 9, characterized in that: The antenna assembly is a horizontally polarized antenna.

14. An electronic device, characterized in that: The electronic device comprises a controller and an omnidirectional antenna assembly as claimed in any one of claims 1 to 13, wherein the controller is coupled to the omnidirectional antenna assembly.

15. The electronic device according to claim 14, characterized in that: The electronic device is a FTTR device.

Images