Antenna assembly and network device

Abstract

The utility model discloses an antenna assembly and network equipment, and relates to the technical field of antennas. The integrated level of the antenna is improved, and the antenna assembly is miniaturized. According to the specific scheme, the antenna assembly comprises a first substrate, a second substrate, a first antenna, a second antenna, a first feeder line, a second feeder line and a separator. The first feed end of the first feed line is used for feeding the first antenna, and the vertical projection of the first feed end on the first surface is a first area. The second feed end of the second feed line is used for feeding the second antenna, and the vertical projection of the second feed end on the first surface is a second area. The vertical projection of the separator on the first surface covers one of the first area or the second area. The spacer may be a split ring resonator. Under the condition that the two substrates of the antenna assembly are stacked, high isolation is ensured. The antenna number of the system is reduced through high integration, and the system can be applied to dual-band or three-band multi-link operation, and can be applied to scenes such as FTTR and the like.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an antenna assembly and a network device. Background Art

[0002] Wireless local area networks (WLANs) are widely used in homes, offices, and other indoor and outdoor environments. In multi-link operation (MLO), multiple frequencies operate and connect simultaneously between devices and terminals, significantly improving communication stability and throughput. Multi-link operation requires multiple antennas operating in the corresponding frequency bands, which increases the number and complexity of antennas.

[0003] How to improve the integration of antennas is an urgent problem that needs to be solved in multi-link operation scenarios. Utility Model Content

[0004] The present application provides an antenna assembly and a network device, aiming to miniaturize the antenna assembly.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions.

[0006] In a first aspect, the present application provides an antenna assembly. The antenna assembly includes a first substrate, a second substrate, a first antenna, a second antenna, a first feed line, a second feed line, and an isolation structure. The first and second substrates are arranged along the thickness direction of the first substrate. The surface of the first substrate closest to the second substrate is the first surface; the surface of the second substrate closest to the first substrate is the second surface. A first antenna is disposed on the first substrate. A second antenna is disposed on the second substrate. A first feeding end of the first feed line is used to feed the first antenna, and a vertical projection of the first feeding end on the first surface is a first area. A second feeding end of the second feed line is used to feed the second antenna, and a vertical projection of the second feeding end on the first surface is a second area. The isolation structure includes at least one first isolation member, the first isolation member being disposed on the first surface or the second surface. Each first isolation member in the isolation structure, when projected vertically onto the first surface, covers one of the first area or the second area.

[0007] Since the first substrate and the second substrate are arranged along the thickness direction of the first substrate, the antenna assembly is arranged compactly, which is beneficial to reducing the volume of the antenna assembly. When the vertical projection of the first isolator on the first surface covers the first area, the first isolator can constrain the first feed end from radiating to components or spaces other than the first antenna, constrain the overflow radiation of the first feed end, and reduce the interference of the end of the first feed line on the second antenna. Similarly, when the vertical projection of the first isolator on the first surface covers the second area, the first isolator can constrain the overflow radiation of the second feed end, and reduce the interference of the end of the second line on the first antenna. In addition, when set on the first surface or the second surface, the first isolator can also reduce the influence between the electromagnetic waves radiated by the first antenna and the electromagnetic waves radiated by the second antenna. The isolation structure gives the antenna assembly the advantage of high integration, while the interference between the first antenna and the second antenna is small.

[0008] In combination with the first aspect, in some achievable embodiments, the first isolation member includes a split resonant ring; and / or the first isolation member includes a conductive sheet.

[0009] In this way, the open resonant ring or the conductive sheet has an isolation effect, and the vertical projection of the open resonant ring or the conductive sheet on the first surface covers the first area or one area in the second area, which can reduce the interference of the feeding end used for feeding to other antennas, and can also reduce the interference between the two antennas.

[0010] In conjunction with the first aspect, in some achievable embodiments, the circumference of the split ring resonator or the circumference of the conductive sheet is within the range of 0.8 times λ to 1.2 times λ. When the perpendicular projection of the first isolator on the first surface covers the first area, λ is the dielectric waveguide wavelength corresponding to the center frequency of the first antenna. When the perpendicular projection of the first isolator on the first surface covers the second area, λ is the dielectric waveguide wavelength corresponding to the center frequency of the second antenna.

[0011] Thus, when the vertical projection of the first isolator on the first surface covers the first area, the first isolator can effectively reduce the radiation spilled from the first feeder terminal feeding the first antenna. Thus, when the vertical projection of the first isolator on the first surface covers the second area, the first isolator can effectively reduce the radiation spilled from the second feeder terminal feeding the second antenna.

[0012] In conjunction with the first aspect, in some achievable embodiments, when the vertical projection of the first isolating member on the first surface covers the first area, the first isolating member is disposed on the first surface. When the vertical projection of the first isolating member on the first surface covers the second area, the first isolating member is disposed on the second surface.

[0013] In this way, the first isolator is close to the first feeder terminal, which can effectively restrain the radiation overflowing from the first feeder terminal and improve the isolation effect of the first isolator. Alternatively, the first isolator is close to the second feeder terminal, which can effectively restrain the radiation overflowing from the second feeder terminal and improve the isolation effect of the first isolator.

[0014] In combination with the first aspect, in some implementable embodiments, there is a gap between the first surface and the second surface.

[0015] In this way, the gap between the first surface and the second surface can reduce interference between the first antenna and the second antenna.

[0016] In combination with the first aspect, in some implementable embodiments, the first surface and the second surface are in contact.

[0017] In this way, the first substrate and the second substrate are in contact, which can further reduce the space occupied by the antenna assembly and increase the integration of the antenna assembly.

[0018] In combination with the first aspect, in some achievable embodiments, the antenna assembly further includes: a dielectric plate, wherein the dielectric plate is located between the first surface and the second surface.

[0019] In this way, the first and second substrates can be separated by a dielectric plate, which can also be equipped with components, allowing the antenna assembly to be applied in more scenarios. The dielectric plate can improve isolation, increase the circularity and gain of the antenna assembly's radiation pattern.

[0020] In combination with the first aspect, in some implementable embodiments, the first antenna is located on a surface of the first substrate opposite to the first surface; the second antenna is located on a surface of the second substrate opposite to the second surface.

[0021] In this way, the second antenna and the first antenna are respectively located on opposite surfaces of the substrate, which is beneficial for increasing the minimum distance between the two antennas and improving the isolation between the two antennas.

[0022] In combination with the first aspect, in some achievable embodiments, the first antenna includes a first series feed line, a first branch, a second branch, a third branch, and a fourth branch. A gap is provided between the first branch and the second branch, and a gap is provided between the third branch and the fourth branch. The first feeding end is used to feed the first branch and the second branch, and the first branch and the second branch feed the third branch and the fourth branch through the first series feed line; the vertical projection of the end of the first series feed line close to the third branch on the first surface is a third area. The isolation structure also includes a second isolation member, which is provided on the first surface or the second surface; the vertical projection of the second isolation member on the first surface covers the third area.

[0023] In this way, the second isolator can restrict the radiation overflowing from the end of the first series feed line close to the third branch, thereby reducing the interference of the end of the first series feed line on the second antenna.

[0024] In conjunction with the first aspect, in some achievable embodiments, a vertical projection of an end portion of the first series feed line close to the first branch on the first surface is a fourth area. When the vertical projection of the first isolator on the first surface covers the first area, the vertical projection of the first isolator on the first surface also covers the fourth area.

[0025] In this way, the first isolator can simultaneously restrict the radiation overflowing from the end of the first series feed line close to the first branch and the radiation overflowing from the first feed end, reduce the impact of the first series feed line and the first feed line on the second antenna, and improve isolation.

[0026] In conjunction with the first aspect, in some achievable embodiments, the first antenna further includes a second series feed line, a fifth branch, and a sixth branch, with a gap between the fifth branch and the sixth branch. The third branch and the fourth branch feed the fifth branch and the sixth branch via the second series feed line; the vertical projection of the end of the second series feed line near the fifth branch on the first surface defines a fifth area. The isolation structure further includes a third isolation member disposed on the first surface or the second surface; the vertical projection of the third isolation member on the first surface covers the fifth area.

[0027] In this way, the third isolator can restrict the radiation overflowing from the end of the second series feeder line close to the fifth branch, thereby reducing the interference of the second series feeder line on the second antenna.

[0028] In combination with the first aspect, in some achievable embodiments, the vertical projection of the third isolating member on the first surface further covers: an area where the vertical projection of the end of the second series feeder close to the third branch on the first surface is located.

[0029] In this way, the third isolator can simultaneously restrict the radiation overflowing from the end of the second series feeder line close to the fifth branch, and restrict the radiation overflowing from the end of the first series feeder line close to the fifth branch, thereby improving isolation.

[0030] In conjunction with the first aspect, in some achievable embodiments, the second antenna is a monopole antenna or a dipole antenna. In this way, the first isolator can reduce interference between the second antenna and the first antenna, thereby optimizing the performance of the antenna assembly.

[0031] In conjunction with the first aspect, in some achievable embodiments, the antenna assembly further includes: a third antenna and a third feeder, wherein the third antenna is disposed on the second substrate; and a third feeder, wherein a third feeding end of the third feeder is used to feed the third antenna.

[0032] In this way, the antenna assembly includes three antennas, which are arranged on two substrates, which can increase the integration of the antenna assembly. The isolation structure also reduces crosstalk between the three antennas, and even if the three antennas are close together, they still have good isolation.

[0033] In conjunction with the first aspect, in some achievable embodiments, a vertical projection of the third feeding terminal on the first surface is a sixth area. The isolation structure further includes a fourth isolation member disposed on the first surface or the second surface; the vertical projection of the fourth isolation member on the first surface covers the sixth area.

[0034] In this way, the fourth isolation member can constrain the overflow radiation of the third feeding end, thereby reducing the influence of the overflow radiation of the third feeding end on the first antenna and the second antenna.

[0035] In combination with the first aspect, in some feasible embodiments, the third antenna is a monopole antenna or a dipole antenna.

[0036] In this way, the antenna structure in the antenna assembly is diverse, which can be adapted to a variety of usage scenarios and enrich the types of antenna assemblies.

[0037] In combination with the first aspect, in some achievable embodiments, the center frequency of the first antenna is less than the center frequency of the second antenna, and the center frequency of the first antenna is less than the center frequency of the third antenna.

[0038] In this way, the lower the antenna's center frequency, the longer its electrical length and the larger the area it requires. If the first antenna has the lowest center frequency of the three antennas, it will occupy the largest area. The second and third antennas, which occupy smaller areas, are placed on the second substrate. Compared to a scenario where the first antenna's center frequency is higher than the third antenna's, this allows for a smaller second substrate and a smaller antenna assembly.

[0039] In combination with the first aspect, in some achievable embodiments, the difference between the center frequency of the second antenna and the center frequency of the third antenna and the center frequency of the first antenna is greater than the difference between the center frequency of the second antenna and the center frequency of the third antenna.

[0040] As a result, the smaller the difference in center frequency, the greater the isolation requirement. Placing the second and third antennas, which have the smallest center frequency difference, on the same substrate reduces interference between the second and third antennas along the thickness of the substrate.

[0041] In conjunction with the first aspect, in some achievable embodiments, a difference between the center frequency of the second antenna and the center frequency of either the first antenna or the third antenna is greater than a difference between the center frequency of the first antenna and the center frequency of the third antenna. The vertical projections of the third antenna and the first antenna on the first surface do not overlap.

[0042] In this way, even if the two antennas with the smallest center frequency difference are arranged on different substrates, the vertical projections of the two antennas with the smallest center frequency difference on the first surface do not overlap, which helps reduce crosstalk between the two antennas. This also reduces interference between the second and third antennas along the thickness direction of the substrate.

[0043] In conjunction with the first aspect, in some achievable embodiments, the first feeder includes an inner conductor and an outer conductor that are electrically isolated. One of the inner conductor and the outer conductor is used to transmit signals for the first antenna, and the other is used to ground the first antenna. The first feeder includes an end of the inner conductor connected to the first antenna and an end of the outer conductor connected to the first antenna.

[0044] In this way, when the vertical projection of the first isolator on the first surface covers the first area, the first isolator can restrict the radiation overflowing from the end of the outer conductor connected to the first antenna and the end of the inner conductor connected to the first antenna.

[0045] In conjunction with the first aspect, in some achievable embodiments, the second feeder includes an inner conductor and an outer conductor that are electrically isolated. One of the inner conductor and the outer conductor is used to transmit signals for the second antenna, and the other is used to ground the second antenna. The first feeder includes an end of the inner conductor connected to the second antenna and an end of the outer conductor connected to the second antenna.

[0046] In this way, when the vertical projection of the first isolator on the first surface covers the second area, the first isolator can restrict the radiation overflowing from the end of the outer conductor connected to the second antenna and the end of the inner conductor connected to the second antenna.

[0047] In a second aspect, the present application provides a network device, comprising: a single board and any one of the antenna assemblies provided in the first aspect, wherein the first feeder and the second feeder are both electrically connected to the single board.

[0048] In combination with the second aspect, in some achievable embodiments, the network device further includes: a housing structure, wherein the antenna assembly and the single board are both located within the housing structure.

[0049] In this way, the single board and the antenna assembly can share a housing structure, thereby increasing the integration of the network device and facilitating miniaturization of the network device.

[0050] In combination with the second aspect, in some achievable embodiments, the network device further includes: a housing structure, the single board is located inside the housing structure, and the first substrate and the second substrate are both located outside the housing structure.

[0051] In this way, the distance between the single board and the antenna assembly is relatively far, and the conductive structure on the single board has little effect on the signal radiated by the antenna assembly.

[0052] In combination with the second aspect, in some achievable embodiments, the network device further includes: a protective shell, the protective shell is located outside the housing structure, and the first substrate and the second substrate are both located inside the protective shell.

[0053] In this way, the protective case can protect the antenna assembly and reduce the pollution of dust, water vapor and the like to the antenna assembly.

[0054] In combination with the second aspect, in some achievable embodiments, the thickness direction of the first substrate is perpendicular to the thickness direction of the single board, or the thickness direction of the first substrate is parallel to the thickness direction of the single board.

[0055] Regarding the beneficial effects of the second aspect, reference may be made to the description of any optional implementation in the first aspect, which will not be repeated here. Based on the implementations provided in the above aspects, this application can also be further combined to provide more implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A structural diagram of a communication system.

[0057] Figure 2 A schematic diagram of the structure of a network device provided in an embodiment of the present application.

[0058] Figure 3 A schematic diagram of the structure of another network device provided in an embodiment of the present application.

[0059] Figure 4 The figure shows a usage scenario of a network device.

[0060] Figure 5 A schematic structural diagram of an antenna assembly provided in an embodiment of the present application.

[0061] Figure 6 A schematic diagram of the exploded structure of an antenna assembly provided in an embodiment of the present application.

[0062] Figure 7 A schematic structural diagram of the first isolation member provided in an embodiment of the present application.

[0063] Figure 8 A schematic structural diagram of the first feeder provided in an embodiment of the present application.

[0064] Figure 9 A structural schematic diagram of the first antenna and the first substrate provided in an embodiment of the present application.

[0065] Figure 10 Another structural schematic diagram of the first antenna and the first substrate provided in an embodiment of the present application.

[0066] Figure 11 This is another structural schematic diagram of the first antenna and the first substrate provided in an embodiment of the present application.

[0067] Figure 12 This is another structural schematic diagram of the first antenna and the first substrate provided in an embodiment of the present application.

[0068] Figure 13 A schematic diagram of the exploded structure of another antenna assembly provided in an embodiment of the present application.

[0069] Figure 14 A schematic structural diagram of another antenna assembly provided in an embodiment of the present application.

[0070] Figure 15 A schematic structural diagram of a single board and antenna assembly provided in an embodiment of the present application.

[0071] Figure 16 This is the S-parameter diagram of the antenna component in the 5GHz-6GHz frequency band.

[0072] Figure 17 This is an S-parameter diagram of the antenna component in the 2.2GHz-2.7GHz frequency band.

[0073] Figure 18 This is another S-parameter diagram of the antenna component in the 2.2GHz-2.7GHz frequency band.

[0074] Figure 19 It is the antenna pattern of the antenna assembly in the 2.45GHz frequency band.

[0075] Figure 20 It is the antenna pattern of the antenna assembly in the 5.2GHz frequency band.

[0076] Figure 21 It is the antenna pattern of the antenna assembly in the 5.8 GHz frequency band.

[0077] In the figure: 1-first room; 2-second room; 10-network device; 11-single board; 100-antenna assembly; 12-housing structure; 13-protective shell; 110-first substrate; 101-first surface; 103-third surface; 120-second substrate; 102-second surface; 104-fourth surface; 210-first antenna; 201-first series feeder; 211-first branch; 212-second branch; 213-third branch; 214-fourth branch; 202-second series feeder; 215-fifth branch; 216-sixth branch; 4 01-seventh branch; 402-eighth branch; 403-first array branch; 404-inverter; 405-second array branch; 230-third antenna; 220-second antenna; 310-first feed line; 311-first feeding terminal; 312-outer conductor; 313-inner conductor; 320-second feed line; 321-second feeding terminal; 130-isolation structure; 131-first isolating element; 132-second isolating element; 133-third isolating element; 134-fourth isolating element; 330-third feed line; 331-third feeding terminal; 140-dielectric plate. DETAILED DESCRIPTION

[0078] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0079] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0080] In addition, in this application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to changes in the orientation of the components in the drawings.

[0081] Antenna return loss: This can be understood as the ratio of the signal power reflected back to the antenna port by the antenna circuit to the antenna port's transmitted power. The smaller the reflected signal, the larger the signal radiated from the antenna into space, and the greater the antenna's radiation efficiency. The larger the reflected signal, the smaller the signal radiated from the antenna into space, and the lower the antenna's radiation efficiency.

[0082] Antenna return loss can be expressed using the S11 parameter, a type of S parameter. S11 represents the reflection coefficient and can characterize the antenna's transmission efficiency.

[0083] In some embodiments, the S11 graph can be understood as a schematic diagram for representing the resonance generated by the antenna. In some embodiments, the portion of the S11 graph showing the resonance less than -4dB can be understood as the resonant frequency range generated by the antenna. The S11 parameter is typically a negative number. A smaller S11 parameter indicates a smaller antenna return loss and less energy reflected back from the antenna itself, which means more energy actually enters the antenna and a higher antenna system efficiency. A larger S11 parameter indicates a greater antenna return loss and a lower antenna system efficiency.

[0084] Isolation refers to the ratio of the signal received by one antenna to the signal from the transmitting antenna. Isolation is a physical quantity used to measure the degree of antenna mutual coupling. Assuming two antennas form a two-port network, the isolation between the two antennas is the S21 and S12 parameters between the antennas. Antenna isolation can be expressed using the S21, S12, S31, and S13 parameters, which are also types of S parameters. S21 and S12 are typically negative numbers. Smaller S21 and S12 parameters indicate greater isolation and less mutual coupling between antennas. Larger S21 and S12 parameters indicate less isolation and greater mutual coupling between antennas. Antenna isolation depends on factors such as the antenna radiation pattern, the spatial distance between the antennas, and antenna gain.

[0085] Communication frequency band / operating frequency band: Regardless of the type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna that supports the B40 frequency band has an operating frequency band of 2300MHz to 2400MHz, or in other words, the antenna's operating frequency band includes the B40 frequency band.

[0086] The resonant frequency range or resonant frequency band and the operating frequency band may be the same or may partially overlap. In one embodiment, one or more resonant frequency bands of the antenna may overlap one or more operating frequency bands of the antenna.

[0087] It should be noted that in engineering, an S11 value of -4dB is generally used as a standard. When the S11 value of an antenna is less than -4dB, it can be considered that the antenna is functioning properly or that the antenna has good transmission efficiency. It should be understood that in engineering, an S11 value of -6dB can also be generally used as a standard. When the S11 value of an antenna is less than -6dB, it can be considered that the antenna is functioning properly or that the antenna has good transmission efficiency.

[0088] Coupling: can be understood as direct coupling or indirect coupling, and "coupling connection" can be understood as direct coupling connection and / or indirect coupling connection. Direct coupling can also be referred to as "electrical connection", which is understood as the physical contact and electrical conduction between components; it can also be understood as the form in which different components in the circuit structure are connected through physical lines such as printed circuit boards (PCBs), copper foils or wires that can transmit electrical signals; "indirect coupling" can be understood as two conductors being electrically connected in an airless / non-contact manner. In one embodiment, indirect coupling can also be referred to as capacitive coupling, for example, by coupling between the gap between two conductive parts to form an equivalent capacitor to achieve signal transmission.

[0089] Antenna pattern: Also known as radiation pattern. This refers to the graph of the relative field strength (normalized modulus) of the antenna's radiation field as it varies with direction at a given distance from the low-frequency antenna. It is usually represented by two mutually perpendicular plane patterns passing through the antenna's direction of maximum radiation.

[0090] Antenna patterns typically have multiple radiation beams. The beam with the strongest radiation intensity is called the main lobe, while the remaining beams are called side lobes. Among the side lobes, those in the opposite direction of the main lobe are also called back lobes.

[0091] dB: decibel, a logarithmic concept with a base of ten. The decibel is only used to evaluate the proportional relationship between one physical quantity and another; it itself has no physical dimension. For every 10-fold increase in the ratio between two quantities, the difference between them can be expressed as 10 decibels. For example: A="100", B="10", C="5", D="1", then A / D = 20dB; B / D = 10dB; C / D = 7dB; B / C = 3dB. In other words, a 10dB difference between two quantities is a 10-fold difference, a 20dB difference is a 100-fold difference, and so on. A 3dB difference is a 2-fold difference between the two quantities.

[0092] dBi: Often mentioned together with dBd. dBi and dBd are units of power gain. Both are relative values, but they are referenced to different parameters. The reference for dBi is an omnidirectional antenna; the reference for dBd is a dipole. It is generally believed that dBi and dBd represent the same gain, with the value expressed in dBi being 2.15 dBi greater than the value expressed in dBd. For example, for an antenna with a gain of 16 dBd, its gain, when converted to dBi, is 18.15 dBi. Generally, the decimal places are ignored and the value is 18 dBi.

[0093] Electric plane (E-Plane): Also known as the E-plane, for linearly polarized antennas, the electric plane is the plane containing the electric field vector (also known as the E aperture) and the direction of maximum radiation. The electric field, or "E" plane, determines the polarization, or direction, of the radio waves. For vertically polarized antennas, the E-plane typically coincides with the vertical / elevation plane. For horizontally polarized antennas, the E-plane typically coincides with the horizontal / azimuth plane. The E-plane and H-plane should be 90 degrees apart.

[0094] Magnetic plane (H-Plane): Also known as the H-plane, the magnetic plane is the plane containing the magnetic field vector (also known as the H-aperture) and the direction of maximum radiation. For linearly polarized antennas, the magnetic field, or "H" plane, is at right angles to the "E" plane. For vertically polarized antennas, the H-plane typically coincides with the horizontal / azimuth plane. For horizontally polarized antennas, the H-plane typically coincides with the vertical / elevation plane.

[0095] Working bandwidth: The working bandwidth of an antenna unit refers to the frequency range in which it works effectively. In engineering, the frequency band where the S11 parameter is less than -10dB or less than -5dB is usually called the working bandwidth.

[0096] The feed section, or feed end, is the combination of all components of an antenna used for both receiving and transmitting radio frequency waves. In the case of a receiving antenna, the feed section can be considered the portion of the antenna from the first amplifier to the front-end transmitter. In a transmitting antenna, the feed section can be considered the section after the last power amplifier.

[0097] Antenna pattern: Also known as radiation pattern. This refers to the graph of the relative field strength (normalized modulus) of the antenna's radiation field as it varies with direction at a given distance from the low-frequency antenna. It is usually represented by two mutually perpendicular plane patterns passing through the antenna's direction of maximum radiation.

[0098] Antenna array: An antenna array consists of multiple identical (or different) antenna elements arranged in a certain pattern. A controller controls the amplitude and phase of the current fed to each antenna element to control the array antenna's radiation pattern. This method is also called beamforming. Beamforming, achieved through a phased array antenna control system, can achieve high gain in a directional manner or enable scanning of the array antenna beam.

[0099] Medium wavelength: Due to the existence of the medium, the electromagnetic parameters of the medium (for example, dielectric constant and magnetic permeability) are different from those in a vacuum. The propagation speed of electromagnetic waves in the medium is different from that in a vacuum, that is, its wavelength is different. The propagation wavelength in the medium is the medium wavelength.

[0100] Figure 1FIG1 is a schematic diagram of the structure of a communication system, which may also be called an optical transmission network. The communication system includes one or more network devices 10, which are used to communicate with user terminals.

[0101] A terminal may also be called terminal equipment, user equipment (UE), mobile station (MS), mobile terminal (MT) or terminal unit (STA).

[0102] In some embodiments, the terminal may be a mobile phone, a tablet computer, a computer with wireless transceiver capabilities, a personal communication service (PCS) phone, a desktop computer, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in a smart home, etc.

[0103] The network device 10 may be a routing and forwarding device with optical communication capabilities, such as a router or a switch. The network device 10 may also be a broadband network gateway (BNG) or a broadband remote access server (BRAS) with optical communication capabilities.

[0104] The terminal can access the server using the network device 10. Figure 1 In the first room 1 shown, a user can use a terminal to establish a communication connection with a network device 10 using wireless local area network (WLAN) technology, so that the terminal can send a data packet to a server. Figure 1 The same applies to the second room 2.

[0105] In some possible scenarios, the terminal may also use optical communication technology and radio access network (RAN) equipment ( Figure 1 (not shown) establishes a communication connection and accesses the server.

[0106] The network device 10 is connected to the server via a wireless or wired manner. The embodiment of the present application does not limit the number of terminal devices, network devices 10 and servers included in the optical communication network.

[0107] For example, the present application may be applied to a fiber-to-the-room (FTTR) scenario.

[0108] This embodiment uses a whole-house fiber optic scenario as an example to illustrate the bandwidth allocation method for the optical communication network provided by this application. This whole-house fiber optic scenario can be implemented using FTTR technology. FTTR refers to a networking technology that replaces network cables with optical fiber, lays optical fiber to every room, and interconnects with the home gateway by deploying optical network equipment 10. Combined with dual-band Wi-Fi, this ensures full-house network coverage.

[0109] Illustratively, the network device 10 includes an antenna assembly 100. The antenna assembly 100 is used to receive and transmit signals. To complete communication in n frequency bands (n is a natural number greater than or equal to 2), n antennas operating in the corresponding frequency bands are required.

[0110] The embodiment of the present application does not limit the usage scenario of the network device 10. The network device 10 can be used as an external antenna pole sleeve or a built-in gateway.

[0111] Figure 2 A schematic diagram of the structure of a network device 10 provided in an embodiment of the present application. Figure 2 In the embodiment, the network device 10 includes a single board 11 and an antenna assembly 100, and the single board 11 is signal-connected to the antenna assembly 100. The single board 11 receives or sends signals through the antenna assembly 100.

[0112] In some embodiments, the single board 11 may also be referred to as a main board. The single board 11 carries electronic components, for example, a radio frequency chip, etc.

[0113] Figure 2 In the example of FIG, the network device 10 further includes a housing structure 12, and the single board 11 and the antenna assembly 100 are both located within the housing structure 12. In this way, the single board 11 and the antenna assembly 100 can share the housing structure 12, thereby increasing the integration of the network device 10 and facilitating miniaturization of the network device 10.

[0114] In some embodiments of the present application, the housing structure 12 is an integrally formed part.

[0115] In some embodiments of the present application, the housing structure 12 is composed of multiple separate structures connected directly or indirectly. For example, the housing structure 12 may include a base, a cover, and a support structure. The base and cover are connected and together form a cavity, in which the single board 11 is located. The support structure is located in the cavity and is used to support the single board 11 or the antenna assembly 100, etc.

[0116] Illustratively, the base may be an integrally formed part, or the base may be formed by connecting a plurality of structural parts.

[0117] For example, the cover body may be a one-piece molded part. Alternatively, the cover body may be formed by connecting multiple structural members distributed along the circumference of the cover body. Alternatively, the cover body may include an inner layer structure and an outer layer structure, and the inner layer structure and the outer layer structure may be directly connected, or a gap may be provided between the inner layer structure and the outer layer structure. The outer layer structure may cover part or all of the inner layer structure.

[0118] In some embodiments, at least one intermediate layer structure may be provided between the inner layer structure and the outer layer structure.

[0119] It is understandable that the aforementioned base and support structure are not necessary. In some embodiments, the housing structure 12 may only include a cover.

[0120] In some embodiments, according to aesthetic requirements or strength requirements, protrusions, grooves or hollow structures can be provided on the base, cover and supporting structure.

[0121] Figure 3 A schematic diagram of the structure of another network device 10 provided in an embodiment of the present application. Figure 3 and Figure 2 The difference includes that the antenna assembly 100 is located outside the housing structure 12 .

[0122] For example, the board 11 is located inside the housing structure 12, and the antenna assembly 100 is located outside the housing structure 12. In this way, the distance between the board 11 and the antenna assembly 100 is relatively far, and the board 11 has little impact on the antenna assembly 100.

[0123] Figure 3 In the example of FIG, the network device 10 further includes a protective shell 13, the protective shell 13 is located outside the housing structure 12, and the antenna assembly 100 is located inside the protective shell 13. In this way, the protective shell 13 can protect the antenna assembly 100 and reduce the pollution of dust, water vapor, etc. to the antenna assembly 100.

[0124] Figure 3 For a description of the remaining structures, see Figure 2 .

[0125] Figure 4 FIG1 is a diagram showing a usage scenario of a network device 10. Figure 4 The network device 10 can be applied to multi-link operations, such as dual-band multi-link operations or triple-band multi-link operations, and the network device 10 can improve the communication rate of the entire communication system.

[0126] Taking the three-band multi-link operation as an example, the three bands may be the 2.4 GHz (gigahertz) band, the 5.2 GHz band, and the 5.8 GHz band.

[0127] Each link includes: a switch (SW), a power amplifier (PA), a low-noise amplifier (LNA), a transmitter (Tx), and a receiver (Rx).

[0128] The uplink signal is received by the receiving device Rx, and the downlink signal is sent by the transmitting device Tx. When the receiving device Rx receives a signal, the switch SW is connected to the receiving device Rx, and when the transmitting device Tx sends a signal, the switch SW is connected to the transmitting device Tx.

[0129] It is understood that in some embodiments, the aforementioned three frequency bands may be other three frequency bands. The operating frequency band of the antenna assembly 100 may be any three frequency bands of the 2.4 GHz frequency band, the 5.2 GHz frequency band, the 5.8 GHz frequency band, the 5 GHz frequency band, or the 6 GHz frequency band.

[0130] It is understood that in some embodiments, the antenna assembly 100 may be a dual-band antenna, for example, a dual-band antenna combining the 2.4 GHz band and the 5.8 GHz band.

[0131] Alternatively, the operating frequency band of the antenna assembly 100 may be any two of the 2.4 GHz band, the 5.2 GHz band, the 5.8 GHz band, the 5 GHz band, or the 6 GHz band.

[0132] It can be understood that in some embodiments of the present application, the operating frequency bands of the antenna assembly 100 can be four or more frequency bands.

[0133] For example, the 2.4 GHz band may have a frequency band width of 2.4 GHz to 2.5 GHz. The 5.2 GHz band may have a frequency band width of 5.17 GHz to 5.33 GHz. The 5.8 GHz band may have a frequency band width of 5.735 GHz to 5.835 GHz. The 5 GHz band may have a frequency band width of 5.17 GHz to 5.835 GHz. The 6 GHz band may have a frequency band width of 5.925 GHz to 7.125 GHz.

[0134] The performance of the antenna assembly 100 directly affects the communication quality of the network device 10. The antenna assembly 100 provided in the embodiment of the present application has excellent performance, which is beneficial to improving the communication quality of the network device 10.

[0135] Figure 5 This is a schematic diagram of the structure of an antenna assembly 100 provided in an embodiment of the present application. Figure 5 The antenna assembly 100 includes a first substrate 110, a second substrate 120, a first antenna 210 (such as Figure 6 As shown), the second antenna 220 (as shown Figure 6 As shown), a first feeder line 310 and a second feeder line 320.

[0136] The first feeder 310 is used to feed the first antenna 210, and the second feeder 320 is used to feed the second antenna 220. The first substrate 110 and the second substrate 120 are arranged along the thickness direction of the first substrate 110. In other words, the first substrate 110 and the second substrate 120 are stacked.

[0137] The thickness direction of the first substrate 110 is defined as the x-direction, and the thickness direction of the second substrate 120 is also defined as the x-direction.

[0138] The surface of the first substrate 110 closest to the second substrate 120 is the first surface 101, and the surface of the first substrate 110 opposite to the first surface 101 is the third surface 103. The surface of the second substrate 120 closest to the first substrate 110 is the second surface 102. The surface of the second substrate 120 opposite to the second surface 102 is the fourth surface 104.

[0139] In other words, the first substrate 110 includes a first surface 101 and a third surface 103 disposed opposite to each other, and the first surface 101 is closer to the second substrate 120 than the third surface 103. The second substrate 120 includes a second surface 102 and a fourth surface 104 disposed opposite to each other, and the second surface 102 is closer to the first substrate 110 than the fourth surface 104.

[0140] In some embodiments of the present application, the first substrate 110 and the second substrate 120 have the same size. In some embodiments, the first substrate 110 and the second substrate 120 have different sizes.

[0141] Figure 6 A schematic diagram of the exploded structure of an antenna assembly 100 provided in an embodiment of the present application. Figure 6 1 is a schematic diagram illustrating various devices on the first surface 101 , the second surface 102 , the third surface 103 and the fourth surface 104 .

[0142] like Figure 6 As shown, the first feeding end 311 of the first feeding line 310 is used to feed the first antenna 210. A vertical projection of the first feeding end 311 on the first surface 101 is a first area.

[0143] The first feeding end 311 is the end of the first feeding line 310 that is directly connected to the branch of the first antenna 210 or indirectly connected via a conductive adhesive layer, a solder layer, etc. The rest of the description of the feeding end in this document is similar.

[0144] The aforementioned “vertical projection of the first feeding end 311 on the first surface 101 ” refers to the projection of the first feeding end 311 on the first surface 101 along a direction perpendicular to the first surface 101 . The rest of the descriptions of “vertical projection” herein are similar.

[0145] The second feeding end 321 of the second feeding line 320 is used to feed the second antenna 220. A vertical projection of the second feeding line 320 on the first surface 101 is a second area.

[0146] Figure 6 In the example, the first antenna 210 is located on the third surface 103, and the second antenna 220 is located on the fourth surface 104. In this way, the second antenna 220 and the first antenna 210 are located on opposite surfaces of the substrate, which helps to increase the minimum distance between the two antennas and improve the isolation between the two antennas.

[0147] like Figure 6 As shown, the antenna assembly 100 further includes an isolation structure 130 . The isolation structure 130 includes at least one first isolation member 131 . The first isolation member 131 is disposed on the first surface 101 or the second surface 102 .

[0148] When the isolation structure 130 includes a plurality of first isolation members 131, all first isolation members 131 may be disposed on the first surface 101. Alternatively, all first isolation members 131 may be disposed on the second surface 102. Alternatively, a portion of the first isolation members 131 may be disposed on the first surface 101, and a portion of the first isolation members 131 may be disposed on the second surface 102.

[0149] A vertical projection of each first isolation member 131 in the isolation structure 130 covers one of the first region or the second region on the first surface 101 .

[0150] The first substrate 110 and the second substrate 120 are arranged along the thickness direction of the first substrate 110 , so the antenna assembly 100 is arranged compactly, which is beneficial to reducing the volume of the antenna assembly 100 .

[0151] When the vertical projection of the first isolator 131 on the first surface 101 covers the first area, the first isolator 131 can restrict the first feeding terminal 311 from radiating toward components or spaces other than the first antenna 210, thereby restricting the overflow radiation from the first feeding terminal 311 and reducing interference from the end of the first feeding line 310 with the second antenna 220. Similarly, when the vertical projection of the first isolator 131 on the first surface 101 covers the second area, the first isolator 131 can restrict the overflow radiation from the second feeding terminal 321 and reduce interference from the end of the second feeding line 320 with the first antenna 210.

[0152] In addition, the first isolation member 131 is disposed on the first surface 101 or the second surface 102 . The first isolation member 131 can also reduce the influence between the electromagnetic waves radiated by the first antenna 210 and the electromagnetic waves radiated by the second antenna 220 .

[0153] When the first substrate 110 and the second substrate 120 in the antenna component 100 are arranged along the thickness direction, the setting of the isolation structure 130 enables excellent isolation between the first antenna 210 and the second antenna 220, so that the antenna component 100 has the advantage of high integration, and at the same time, the interference between the first antenna 210 and the second antenna 220 is small.

[0154] In addition, improving the isolation between the first antenna 210 and the second antenna 220 is beneficial to reducing the performance requirements of devices such as the RF front-end filter or duplexer connected to the antenna assembly 100, reducing interference in adjacent frequency bands, and improving the performance of the overall RF link to the antenna assembly.

[0155] The aforementioned “vertical projection of the first spacer 131 on the first surface 101” refers to the projection of the outer contour of the first spacer 131 on the first surface 101, along a direction perpendicular to the first surface 101. If the first spacer 131 has a slit or hole, the vertical projection of the slit or hole on the first spacer 131 on the first surface 101 also constitutes part of the vertical projection of the first spacer 131 on the first surface 101.

[0156] In the embodiment of the present application, the isolation structure 130 includes a first isolation member 131 , and a vertical projection of the first isolation member 131 on the first surface 101 covers the first area or the second area.

[0157] In the embodiment of the present application, the isolation structure 130 includes two first isolation members 131. One first isolation member 131 has a vertical projection covering the first area when viewed from the first surface 101, and the other first isolation member 131 has a vertical projection covering the second area when viewed from the first surface 101. This improves the isolation effect of the isolation structure 130 and improves the isolation between the first antenna 210 and the second antenna 220.

[0158] In the embodiments of the present application, the vertical projection of the first isolator 131 on the first surface 101 covers the first area, allowing for manufacturing errors and assembly errors. For example, if the vertical projection of the first isolator 131 on the first surface 101 covers 95% or more of the first area, it can be considered that the vertical projection of the first isolator 131 on the first surface 101 covers the first area. In some embodiments, the vertical projection of the first isolator 131 on the first surface 101 overlaps with the first area. The vertical projection of the first isolator 131 on the first surface 101 covers the second area in the same manner. The descriptions of covering the third area and covering the fourth area in this article are similar and will not be repeated herein.

[0159] As mentioned above, in the embodiment of the present application, the first isolation member 131 may be disposed on the first surface 101 or the second surface 102 .

[0160] When the vertical projection of the first isolating member 131 on the first surface 101 covers the first area, the first isolating member 131 is disposed on the first surface 101. In this way, the first isolating member 131 is close to the first feeding terminal 311, which can effectively confine the radiation overflowing from the first feeding terminal 311 and improve the isolation effect of the first isolating member 131.

[0161] In some embodiments of the present application, when the vertical projection of the first isolation member 131 on the first surface 101 covers the first area, the first isolation member 131 can be set on the second surface 102 and can be set according to the distribution of devices on the first surface 101 and the second surface 102.

[0162] Similarly, in some embodiments of the present application, when the vertical projection of the first isolating member 131 on the first surface 101 covers the second area, the first isolating member 131 is disposed on the second surface 102. In this way, the first isolating member 131 is close to the second feeding terminal 321, which can effectively confine the radiation overflowing from the second feeding terminal 321 and improve the isolation effect of the first isolating member 131.

[0163] In some embodiments of the present application, when a vertical projection of the first isolation member 131 on the first surface 101 covers the second area, the first isolation member 131 may be disposed on the first surface 101 .

[0164] In the embodiment of the present application, the antenna and the isolation structure are both made of conductive materials, such as copper, aluminum, stainless steel, brass, gold foil, silver-plated copper, etc. The first substrate and the second substrate are both made of dielectric materials.

[0165] In the embodiment of the present application, the first isolating member 131 has various structures. Figure 7 An exemplary description is given.

[0166] Figure 7 This is a schematic structural diagram of the first isolation member 131 provided in an embodiment of the present application. Figure 7 FIG. 1 (a) shows a schematic structural diagram of a first isolation member 131 .

[0167] Figure 7 In Figure (a), the first isolator 131 includes a split ring resonator (SRR). A split ring resonator is also known as a split ring resonator (SRR). A split ring resonator is an open-loop structure made of a conductive material with an opening at the end. In other words, a split ring resonator is a ring structure that is disconnected at both ends. The split ring resonator can be square, circular, elliptical, or an irregular open-loop structure.

[0168] The split ring resonator has an isolation effect, which can reduce the interference of the feeding end used for feeding to other antennas. The split ring resonator can also reduce the interference between two antennas.

[0169] The embodiment of the present application does not limit the opening direction of the first isolation member 131. The opening direction of the first isolation member 131 can be any direction perpendicular to the thickness direction of the first substrate.

[0170] For example Figure 6 The two first isolation members 131 in the embodiment can both be considered as split resonant rings.

[0171] Figure 7 In FIG. 1 , the vertical projection of the first isolator 131 on the first surface includes the opening of the split ring resonator and the vertical projection of the inner ring on the first surface.

[0172] In some embodiments, the circumference of the split resonant ring is a first value, which may be 0.8 to 1.2 times the wavelength λ, which is the dielectric waveguide wavelength of the antenna corresponding to the first isolator 131 .

[0173] The circumference of the aforementioned split resonant ring is: the distance from the beginning to the end of the outer edge of the split resonant ring along the circumference of the split resonant ring.

[0174] For example, the first value may be 0.8 times λ, 0.9 times λ, 1 times λ, 1.1 times λ, 1.15 times λ, or 1.2 times λ, etc.

[0175] For example, when the vertical projection of the first isolator 131 on the first surface covers the first area, λ is the dielectric waveguide wavelength corresponding to the center frequency of the first antenna. In this way, the first isolator 131 can effectively reduce the radiation overflowing from the first feeding end feeding the first antenna.

[0176] In the embodiment of the present application, the aforementioned “center frequency of the first antenna” refers to the median of the operating frequency band of the first antenna. The rest of the description of the center frequency in this document is similar.

[0177] For example, when the vertical projection of the first isolator 131 on the first surface covers the second area, λ is the dielectric waveguide wavelength corresponding to the center frequency of the second antenna. In this way, the first isolator 131 can effectively reduce the radiation overflowing from the second feeding end feeding the second antenna.

[0178] Figure 7 In FIG. 1B , the first isolating member 131 includes a conductive sheet. The conductive performance of the conductive sheet covering the second region or the second region with a vertical projection is conducive to improving the isolation between the first antenna and the second antenna.

[0179] Figure 7 In FIG. 5( b ), the conductive sheet is a quadrilateral sheet structure. In other embodiments of the present application, the conductive sheet may be triangular, pentagonal, hexagonal, circular, or irregular in shape.

[0180] In some embodiments of the present application, the conductive sheet may have holes or gaps, etc. In some embodiments of the present application, the conductive sheet may have a mesh structure.

[0181] The area where the vertical projection of the conductive sheet on the first surface is located is the area enclosed by the vertical projection of the outer contour of the conductive sheet on the first surface.

[0182] In some embodiments, the perimeter of the conductive sheet is a first value, in other words, the perimeter of the outer edge of the conductive sheet is a first value. Figure 7 Description of Figure (a).

[0183] Figure 7 In FIG. 1( c ), the first isolating member 131 includes a conductive sheet and an open resonant ring, and the conductive sheet and the open resonant ring are not in contact. Figure 7 For the description of the split ring resonator in Figure (b), please refer to Figure 7 Description of Figure (a).

[0184] In the embodiment of the present application, the first antenna 210 can be a monopole antenna or a dipole antenna. The second antenna 220 can be a monopole antenna or a dipole antenna. In this way, the antenna assembly 100 provided in the embodiment of the present application can be applicable to different types of antenna combinations.

[0185] The embodiment of the present application does not limit the structure of the feeder.

[0186] Figure 8 This is a schematic diagram of the structure of the first feeder 310 provided in the embodiment of the present application. Figure 8The first feeder 310 includes an outer conductor 312 and an inner conductor 313 . The outer conductor 312 is disposed outside the inner conductor 313 . The outer conductor 312 and the inner conductor 313 are electrically isolated.

[0187] Exemplarily, an insulating layer is provided between the outer conductor 312 and the inner conductor 313. One of the outer conductor 312 and the inner conductor 313 is used to transmit signals for the first antenna, while the other is used to ground the first antenna. In other words, one of the outer conductor 312 and the inner conductor 313 is a signal line, and the other is a ground line.

[0188] In some embodiments, the first feed line 310 may be considered a coaxial cable.

[0189] The first feeding terminal 311 includes an outer conductor 312 connected to the first antenna and an inner conductor 313 connected to the first antenna. The first region includes the perpendicular projection of the outer conductor 312 connected to the first antenna and the perpendicular projection of the inner conductor 313 connected to the first antenna on the first surface.

[0190] When the vertical projection of the first isolator on the first surface covers the first area, the first isolator can restrict the radiation overflowing from the end of the outer conductor 312 connected to the first antenna and the end of the inner conductor 313 connected to the first antenna.

[0191] Exemplarily, the outer conductor 312 and the first antenna may be connected via a solder layer, a conductive adhesive, etc. Exemplarily, the inner conductor 313 and the first antenna may be connected via a solder layer, a conductive adhesive, etc.

[0192] For the structure of the second feeder, see Figure 8 The description of the first feeder 310 is omitted here.

[0193] In some embodiments of the present application, the first antenna 210 is a dipole antenna.

[0194] Figure 9 This is a structural diagram of the first antenna 210 and the first substrate 110 provided in an embodiment of the present application. Figure 9 The first antenna 210 includes a first series feed line 201 , a first branch 211 , a second branch 212 , a third branch 213 and a fourth branch 214 .

[0195] A gap is formed between the first branch 211 and the second branch 212, and a gap is formed between the third branch 213 and the fourth branch 214. The first feeding terminal 311 is used to feed power to the first branch 211 and the second branch 212. The first branch 211 and the second branch 212 feed power to the third branch 213 and the fourth branch 214 via the first series feeder 201.

[0196] The first series feeder 201 has two opposing ends. One end of the first series feeder 201 is adjacent to the first branch 211 and the second branch 212, and the other end of the first series feeder 201 is adjacent to the third branch 213 and the fourth branch 214. The vertical projection of the end of the first series feeder 201 adjacent to the third branch 213 on the first surface 101 forms a third region. The vertical projection of the end of the first series feeder 201 adjacent to the first branch 211 on the first surface 101 forms a fourth region.

[0197] The isolation structure 130 further includes a second isolation member 132, which is disposed on the first surface 101 or the second surface 102 (eg, Figure 6 The vertical projection of the second isolation member 132 on the first surface 101 covers the third area.

[0198] In this way, the second isolation member 132 can restrict the radiation overflowing from the end of the first series feed line 201 close to the third branch 213, thereby reducing the radiation from the end of the first series feed line 201 to the second antenna 220 (eg, Figure 6 shown).

[0199] For the structure and size of the second isolation member 132, please refer to Figure 7 131 is described in detail in the accompanying drawings.

[0200] In some embodiments of the present application, the second spacer 132 is disposed on the first surface 101. Thus, the second spacer 132 and the first antenna 210 are both located on the first substrate 110, and the second spacer 132 is relatively close to the first series feed line 201. Therefore, the second spacer 132 has a strong effect on restricting the radiation that overflows from the end of the first series feed line 201.

[0201] In some embodiments of the present application, the second isolator 132 is disposed on the second surface 102. Thus, the second isolator 132 and the second antenna 220 share the second substrate 120, and the second isolator 132 still has the function of restricting the radiation overflowing from the end of the first series feed line 201.

[0202] The embodiment of the present application does not limit the shapes of the first branch 211, the second branch 212, the third branch 213, and the fourth branch 214, and they are arranged according to the space of the first substrate 110 and the electrical length of the first antenna. For example, some of the branches can be balun structures.

[0203] Figure 9 The structure of the first series feeder 201 in the example is the same as Figure 8 The structure of the first feeder 310 is the same as that of the first series feeder 201. Figure 8 The structure of the first feeding end 311 is the same as that of Figure 8 Description in .

[0204] exist Figure 9 In the example, when the vertical projection of the first spacer 131 on the first surface 101 covers the first area, the vertical projection of the first spacer 131 on the first surface also covers the fourth area. In other words, the vertical projection of one first spacer 131 on the first surface in the isolation structure 130 covers the fourth area and the first area.

[0205] In this way, the first isolator 131 can simultaneously restrict the radiation overflowing from the end of the first series feed line 201 close to the first branch 211 and the radiation overflowing from the first feeding end 311, reducing the impact of the first series feed line 201 and the first feed line 310 on the second antenna 220 and improving isolation.

[0206] In some embodiments of the present application, the first antenna 210 , which is a dipole antenna, may further include multiple branches.

[0207] Figure 10 Another structural schematic diagram of the first antenna 210 and the first substrate 110 provided in an embodiment of the present application. Figure 10 and Figure 9 The differences include: the first antenna 210 further includes a second series feed line 202 , a fifth branch 215 and a sixth branch 216 , and a gap between the fifth branch 215 and the sixth branch 216 . The isolation structure 130 further includes a third isolation member 133 .

[0208] The third branch 213 and the fourth branch 214 feed the fifth branch 215 and the sixth branch 216 through the second series feeder 202 . The vertical projection of the end of the second series feeder 202 close to the fifth branch 215 on the first surface 101 is a fifth area.

[0209] The third isolation member 133 is disposed on the first surface 101 or the second surface 102 (eg Figure 6 As shown), the vertical projection of the third isolation member 133 on the first surface 101 covers the fifth area.

[0210] In this way, the third isolation member 133 can restrict the radiation overflowing from the end of the second series feed line 202 close to the fifth branch 215, thereby reducing the radiation of the second series feed line 202 to the second antenna 220 (eg, Figure 6 shown).

[0211] For the structure and size of the third isolation member 133, please refer to Figure 7 For the positional relationship between the third isolator 133 and the second series feeder 202, please refer to the aforementioned description of the second isolator 132 and the first series feeder 201.

[0212] Figure 10 The structure of the second series feeder 202 is similar to Figure 8 The structure of the first feeder 310 is the same.

[0213] In some embodiments, the vertical projection of the second isolator 132 on the first surface also covers the following area: the area where the vertical projection of the end of the second series feeder 202 close to the third branch 213 is located on the first surface 101 .

[0214] In this way, the second isolation member 132 can simultaneously restrict the radiation overflowing from the end of the first series feed line 201 and the end of the second series feed line 202 , thereby improving the isolation.

[0215] In some embodiments of the present application, the first antenna 210 may further include a greater number of branches, for example, eight branches, ten branches, etc.

[0216] In some embodiments of the present application, the first series feeder 201 may not be the aforementioned Figure 8 The structure of the first feeder 310 is shown in FIG.

[0217] Figure 11 This is another structural schematic diagram of the first antenna 210 and the first substrate 110 provided in an embodiment of the present application. Figure 11 and Figure 10 The differences include: the structures of the first series feeder 201 and the second series feeder 202 are different.

[0218] Figure 11 In the embodiment, the first series feed line 201 is a waveguide structure, and the first series feed line 201 can be formed on the first substrate 110 by using a printed circuit board process.

[0219] The first series feed line 201 may be a coplanar waveguide (CPW), which consists of two ground planes and a signal line in the middle. The first branch 211 and the second branch 212 feed the third branch 213 and the fourth branch 214 through the CPW.

[0220] Figure 11 In the embodiment of FIG. 5 , the second series feed line 202 is also a coplanar waveguide.

[0221] Figure 11 In the embodiment of Figure 10 Since the radiation overflowing from the end of the coplanar waveguide is small, when the second isolator is not provided, the interference of the coplanar waveguide on the second antenna is also small.

[0222] same, Figure 11 In the embodiment of Figure 10 Since the radiation overflowing from the end of the coplanar waveguide is small, when the third isolator is not provided, the interference of the coplanar waveguide on the second antenna is also small.

[0223] In some embodiments of the present application, Figure 11 The example shown can also be provided with the aforementioned second isolator, for example, Figure 10 The second isolation member 132 in the.

[0224] Figures 9 to 11 In some embodiments, the first antenna 210 is a dipole antenna. In some embodiments, the first antenna 210 is a monopole antenna.

[0225] Figure 12 This is another structural diagram of the first antenna 210 and the first substrate 110 provided in the embodiment of the present application. Figure 12 The first antenna 210 is a monopole antenna, and the first feeder 310 is connected to the monopole antenna.

[0226] Figure 12 In the embodiment, the first antenna 210 includes two branches, both of which are connected to the first feeder 310. The first feeder 310 is used to transmit signals to one of the two branches, and the first feeder 310 is used to ground the other of the two branches.

[0227] Illustratively, the two branches include a seventh branch 401 and an eighth branch 402 .

[0228] Figure 12 In the embodiment, the seventh branch 401 may be a balun structure. The eighth branch 402 includes a first array branch 403, an inverter 404, and a second array branch 405 connected in sequence.

[0229] In some embodiments, the inverter 404 may also be referred to as an inductive inverter. The inverter 404 enables the currents in the first array of branches 403 and the currents in the second array of branches 405 within corresponding operating frequency bands to be substantially in phase.

[0230] In some embodiments, the first antenna 210 may also be referred to as a dual-element Franklin monopole antenna.

[0231] Figure 12 The structure of the first feeder 310 is similar to Figure 8 The structure of the first feeder 310 is the same as that of Figure 8 Description in . Figure 12 The structure of the first feeding end 311 of the first feeding line 310 is similar to Figure 8 The structure of the first feeding end 311 is the same as that of Figure 8 Description in .

[0232] One of the inner conductor or the outer conductor of the first feeder line 310 is connected to the seventh branch 401 , and the other of the inner conductor or the outer conductor of the first feeder line 310 is connected to an end of the first array branch 403 away from the inverter 404 .

[0233] Figure 12 For the structure and size of the first isolator 131, please refer to Figure 7 Description in .

[0234] Figure 12 In the embodiment, the provision of the first isolation member 131 can constrain the radiation overflowing from the first feeding end 311 of the first feeding line 310 , thereby reducing the influence of the overflowing radiation on the second antenna 220 .

[0235] The positional relationship between the second antenna 220 and the second substrate 120 can be referred to the positional relationship between the first antenna 210 and the first substrate 110 .

[0236] In the embodiment of the present application, the structure of the second antenna 220 can be Figures 9-12 The positional relationship and connection relationship between the second antenna 220 and the isolation structure 130 can be the same as Figures 9-12 The first antenna 210 and the isolation structure 130 shown in FIG are the same and are not described again here.

[0237] It is understood that the structures of the first antenna 210 and the second antenna 220 may be the same or different. For example, the first antenna 210 and the second antenna 220 may both be dipole antennas or monopole antennas. In embodiments where the first antenna 210 and the second antenna 220 are both dipole antennas, the number of branches in the first antenna 210 and the second antenna 220 may be the same or different.

[0238] In an embodiment of the present application, the antenna assembly 100 may include three, four or more antennas.

[0239] Figure 13 A schematic diagram of the exploded structure of another antenna assembly 100 provided in an embodiment of the present application. Figure 13 1 is a schematic diagram illustrating various devices on the first surface 101 , the second surface 102 , the third surface 103 and the fourth surface 104 .

[0240] Figure 13 and Figure 6 The difference between the two is that the antenna assembly 100 may further include a third antenna 230 and a third feeding line 330 , and the third antenna 230 is located on the second substrate 120 . The third feeding end 331 of the third feeding line 330 is used to feed the third antenna 230 .

[0241] Thus, the antenna assembly 100 includes three antennas disposed on two substrates, which can increase the integration of the antenna assembly 100. Furthermore, due to the provision of the isolation structure 130, crosstalk between the three antennas is minimized, and good isolation is achieved even when the three antennas are close together.

[0242] Figure 13 The rest of the structure can be found in the above Figure 6 Description in .

[0243] In some embodiments of the present application, the isolation structure 130 may also be provided with an isolation member to restrict the radiation overflowing from the third feeding terminal 331 .

[0244] In the embodiment of the present application, the third antenna can be a dipole antenna or a monopole antenna. In this way, the antenna structure in the antenna assembly 100 is diverse, which can adapt to various usage scenarios and enrich the types of antenna assemblies 100.

[0245] The positional relationship between the third antenna 230 and the second substrate 120 can be referred to the positional relationship between the first antenna 210 and the first substrate 110 .

[0246] The structure of the third antenna 230 can be Figures 9-12 The structure of the first antenna 210 is shown in FIG.

[0247] Figure 13 In the embodiment, the vertical projection of the third feeding end 331 on the first surface 101 is the sixth area, and the isolation structure 130 further includes a fourth isolation member 134, which is arranged on the first surface 101 or the second surface 102, and the vertical projection of the fourth isolation member 134 on the first surface 101 covers the sixth area.

[0248] In this way, the fourth isolation member 134 can constrain the radiation overflowing from the third feeding terminal 331 , thereby reducing the influence of the radiation overflowing from the third feeding terminal 331 on the first antenna 210 and the second antenna 220 .

[0249] The connection relationship between the third antenna 230 and the isolation structure 130 can be the same as Figures 9-12 The first antenna 210 and the isolation structure 130 shown in FIG are the same and will not be described in detail here. Figure 8 The structure of the first feeder 310 is the same as that of the first feeder 310. Figure 8 The structure of the first feeding end 311 is the same as that of Figure 8 Description in .

[0250] In some embodiments, the first antenna 210 is a monopole antenna, and the structure of the first antenna 210 is as described above. Figure 12The second antenna 220 and the third antenna 230 are both dipole antennas. The structure of the second antenna 220 or the third antenna 230 is as described above. Figures 9-11 The structure of any of the examples in the figure.

[0251] Figure 13 In the embodiment of FIG. 1 , the fourth spacer 134 covering the sixth region is disposed on the second surface 102, and the first spacer 131 covering the second region is disposed on the first surface 101. The first spacer 131 covering the first region is disposed on the second surface 102. In other embodiments, the first spacer 131 and the fourth spacer 134 may be located on the same surface.

[0252] Figure 13 In the embodiment of the present invention, the first feeder 310, the second feeder 320 and the third feeder 330 all extend in the same direction. For example, the first feeder 310, the second feeder 320 and the third feeder 330 all extend in the same direction. Figure 13 Extending downwards.

[0253] In some embodiments of the present application, the first feeder 310, the second feeder 320, and the third feeder 330 may extend in different directions. For example, some feeders may extend downward, some feeders may extend upward, or the three feeders may extend in opposite directions. This is not a limitation of the present application.

[0254] In some embodiments of the present application, the operating frequency bands of the first antenna 210, the second antenna 220, and the third antenna 230 may be different from each other, or at least two of them may be different, and may be set as required.

[0255] In some embodiments, the center frequency of the first antenna 210 is lower than the center frequency of the second antenna 220 , and the center frequency of the first antenna 210 is lower than the center frequency of the third antenna 230 .

[0256] The lower the center frequency of an antenna, the longer its electrical length and the larger the area it requires. Since the center frequency of first antenna 210 is the lowest among the three antennas, first antenna 210 requires the largest area. The second and third antennas 220 and 230, which occupy smaller areas, are then placed on second substrate 120. Compared to a scenario where the center frequency of first antenna 210 is higher than the center frequency of third antenna 230, this allows for a smaller volume on second substrate 120, reducing the size of antenna assembly 100.

[0257] For example, the center frequencies of the first antenna 210, the second antenna 220 and the third antenna 230 may be 2.4 GHz, 5.1 GHz and 5.2 GHz respectively; or 2.4 GHz, 5.2 GHz and 5.1 GHz respectively; or 2.4 GHz, 6 GHz and 5 GHz respectively.

[0258] In some embodiments of the present application, the difference between the center frequency of the first antenna 210 and the center frequency of either the second antenna 220 or the third antenna 230 is greater than the difference between the center frequency of the second antenna 220 and the center frequency of the third antenna 230. In other words, among the first antenna 210, the second antenna 220, and the third antenna 230, the difference between the center frequency of the second antenna 220 and the center frequency of the third antenna 230 is the smallest.

[0259] The smaller the difference in center frequency, the greater the isolation requirement between the two. Therefore, the second antenna 220 and the third antenna 230, which have the smallest center frequency difference, are placed on the same substrate. In the thickness direction of the substrate, the interference between the second antenna 220 and the third antenna 230 is small.

[0260] In an embodiment where the difference between the center frequency of the second antenna 220 and the center frequency of the third antenna 230 is minimized, the center frequencies of the first antenna 210, the second antenna 220, and the third antenna 230 may be 2.4 GHz, 5.1 GHz, and 5.2 GHz, respectively; or may be 2.4 GHz, 5.2 GHz, and 5.1 GHz, respectively; or may be 2.4 GHz, 6 GHz, and 5 GHz, respectively, etc.

[0261] In some embodiments of the present application, among the three antennas, the two antennas with the smallest difference in center frequency can be respectively arranged on different substrates.

[0262] For example, the difference between the center frequency of the first antenna 210 and the center frequency of the third antenna 230, and the center frequency of the second antenna 220, is greater than the difference between the center frequency of the first antenna 210 and the center frequency of the third antenna 230. In other words, among the first antenna 210, the second antenna 220, and the third antenna 230, the difference between the center frequency of the first antenna 210 and the center frequency of the third antenna 230 is the smallest.

[0263] The third antenna 230 is located on the second substrate 120, and the first antenna 210 is located on the first substrate 110. The vertical projections of the third antenna 230 and the first antenna 210 on the first surface 101 do not overlap. This ensures that, even if the two antennas with the smallest center frequency difference are located on different substrates, their vertical projections on the first surface 101 do not overlap, helping to reduce crosstalk between the two antennas. This also minimizes interference between the second antenna 220 and the third antenna 230 along the thickness of the substrate.

[0264] Please return Figure 5 , the first substrate 110 and the second substrate 120 are arranged along the thickness direction (x direction) of the first substrate 110 .

[0265] In some embodiments of the present application, there is a gap between the first surface 101 and the second surface 102 . Figure 5 In the embodiment, along the thickness direction of the first substrate 110, the distance H between the first surface 101 and the second surface 102 is greater than 0. Thus, the gap between the first surface 101 and the second surface 102 can reduce interference between the first antenna 210 and the second antenna 220. The air layer between the first surface 101 and the second surface 102 can reduce the effect of mutual reflection between the first antenna 210 and the second antenna 220, which can reduce the circularity of the radiation pattern.

[0266] For example, the distance H between the first surface 101 and the second surface 102 may be 0.1 mm (millimeter) to 10 mm. For example, the distance H between the first surface 101 and the second surface 102 may be 0.1 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0267] In some embodiments of the present application, there is no gap between the first surface 101 and the second surface 102. In other words, the distance H between the first surface 101 and the second surface 102 is zero, or the first surface 101 and the second surface 102 are in contact. This can further reduce the space occupied by the antenna assembly 100 and increase the integration density of the antenna assembly 100.

[0268] In some embodiments of the present application, other devices may be disposed between the first substrate 110 and the second substrate 120 .

[0269] Figure 14 This is a structural diagram of another antenna assembly 100 provided in an embodiment of the present application. Figure 14 and Figure 5 The differences include: the antenna assembly 100 further includes: a dielectric plate 140 , and the dielectric plate 140 is located between the first surface 101 and the second surface 102 .

[0270] Thus, the first substrate 110 and the second substrate 120 can be separated by the dielectric plate 140. The dielectric plate 140 can also be provided with components, making the antenna assembly 100 applicable to more scenarios. The dielectric plate 140 can improve isolation, and increase the circularity and gain of the antenna assembly 100.

[0271] In some embodiments, the first substrate 110 may be connected to the dielectric plate 140 or spaced apart from the dielectric plate 140. Similarly, the second substrate 120 may be connected to the dielectric plate 140 or spaced apart from the dielectric plate 140.

[0272] The size of the dielectric plate 140 can be set according to requirements and the size of the space between the first substrate 110 and the second substrate 120 .

[0273] Figure 14 For the rest of the structure, please refer to the above Figure 5 The description is not repeated here.

[0274] Please return Figure 2 The network device 10 includes a single board 11 and an antenna assembly 100. The first feeder 310 and the second feeder 320 are electrically connected to the single board 11. The first feeder 310, the second feeder 320, the first substrate 110 and the second substrate 120 are all located in the housing structure 12.

[0275] In the embodiment where the antenna assembly 100 includes a third antenna and a third feeder, the third feeder is electrically connected to the single board 11 .

[0276] Figure 2 In the example, the network device 10 includes two antenna assemblies 100 , and the two antenna assemblies 100 are respectively located on both sides of the single board 11 .

[0277] In some embodiments of the present application, two antenna assemblies 100 may be arranged opposite each other or opposite each other. For example, the first substrate 110 of one antenna assembly 100 may be closer to the single board 11 than the second substrate 120 of the same antenna assembly 100. The first substrate 110 of the other antenna assembly 100 may be farther away from the single board 11 than the second substrate 120 of the same antenna assembly 100.

[0278] Alternatively, both antenna assemblies 100 satisfy that the first substrate 110 is closer to the single board 11 than the second substrate 120 in the same antenna assembly 100. Alternatively, both antenna assemblies 100 satisfy that the first substrate 110 is farther away from the single board 11 than the second substrate 120 in the same antenna assembly 100.

[0279] Figure 3In the example, the single board 11 is located inside the shell structure 12 , and the first substrate 110 and the second substrate 120 are located outside the shell structure 12 .

[0280] exist Figure 2 and Figure 3 In the example, the thickness direction of the first substrate 110 is perpendicular to the thickness direction of the single board 11. In this way, along the thickness direction of the first substrate 110, the overlapping area of the single board 11 and the first substrate 110 is small, which can reduce the impact of the single board 11 on the signal radiated by the antenna assembly 100.

[0281] In the embodiments of the present application, the thickness direction of the first substrate 110 is perpendicular to the thickness direction of the single board 11, and manufacturing and assembly errors are tolerated. For example, the thickness direction of the first substrate 110 is perpendicular to the thickness direction of the single board 11, which means that the angle between the thickness direction of the first substrate 110 and the thickness direction of the single board 11 is 88°-92°. For example, the angle can be 88°, 89°, 90°, 91°, or 92°.

[0282] Figure 15 This is a structural diagram of a single board 11 and an antenna assembly 100 provided in an embodiment of the present application. Figure 15 , the thickness direction (x direction) of the first substrate 110 is parallel to the thickness direction of the single board 11 .

[0283] In the embodiments of the present application, the thickness direction of the first substrate 110 is parallel to the thickness direction of the single board 11, allowing for manufacturing and assembly errors. For example, the thickness direction of the first substrate 110 is parallel to the thickness direction of the single board 11, which means that the angle between the thickness direction of the first substrate 110 and the thickness direction of the single board 11 is 0°-2°. For example, the angle can be 0°, 1°, or 2°.

[0284] In this way, along the thickness direction of the first substrate 110 , the overlapping area between the single board 11 and the first substrate 110 is small, which can reduce the influence of the single board 11 on the signal radiated by the antenna assembly 100 .

[0285] In some embodiments of the present application, the thickness direction of the first substrate 110 and the thickness direction of the single board 11 may not be perpendicular to each other, nor may they be parallel to each other.

[0286] Figure 15 For a description of the remaining structures, see Figure 5 .

[0287] The following combination Figures 16-21 right Figure 13 The performance of the antenna assembly 100 is described.

[0288] Figure 16 This is the S-parameter diagram of the antenna component in the 5GHz-6GHz frequency band. Figure 16 In the figure, curve s1 is the S11 parameter curve for an antenna operating in the 5.8 GHz band. Curve s2 is the S22 parameter curve for an antenna operating in the 5.2 GHz band. Curve s3 is the isolation curve between the 5.8 GHz and 5.2 GHz antennas, and can also be called the S21 parameter curves for the two antennas.

[0289] When the S11 parameter is less than -10dB, it indicates that the antenna impedance is matched. The operating frequency of the antenna in the 5.8GHz band is: 5.735GHz-5.835GHz.

[0290] When the S22 parameter is less than -10dB, it indicates that the antenna impedance is matched. The operating frequency of the antenna in the 5.2GHz band is: 5.17GHz-5.33GHz.

[0291] In the 5GHz-6GHz frequency band, the S21 parameter is less than -20dB, indicating that the isolation between the two antennas in the 5GHz-6GHz frequency band is greater than 20dB.

[0292] Figure 17 This is an S-parameter diagram of the antenna component in the 2.2GHz-2.7GHz frequency band. Figure 17 In the figure, curve s4 is the S22 parameter curve for the antenna operating in the 5.2 GHz band. Curve s5 is the S33 parameter curve for the antenna operating in the 2.4 GHz band. Curve s6 is the isolation curve between the antenna operating in the 5.2 GHz band and the antenna operating in the 2.4 GHz band. Curve s6 can also be called the S32 parameter curve for the two antennas.

[0293] If the S33 parameter is less than -10dB, the antenna impedance is matched. This indicates that the antenna's operating frequency is in the 2.4-GHz to 2.5-GHz band.

[0294] In the 2.4 GHz-2.5 GHz frequency band, the S32 parameter is less than -20 dB, indicating that the isolation between the two antennas in the 2.4 GHz-2.5 GHz frequency band is greater than 20 dB.

[0295] Figure 18 This is another S-parameter diagram of the antenna component in the 2.2GHz-2.7GHz frequency band. Figure 18In the figure, curve s7 is the S11 parameter curve for the antenna operating in the 5.8 GHz band. Curve s8 is the S33 parameter curve for the antenna operating in the 2.4 GHz band. Curve s9 is the isolation curve between the antenna operating in the 5.8 GHz band and the antenna operating in the 2.4 GHz band. Curve s9 can also be called the S31 parameter curve for the two antennas.

[0296] If the S33 parameter is less than -10dB, the antenna impedance is matched. This indicates that the antenna's operating frequency is in the 2.4-GHz to 2.5-GHz band.

[0297] In the 2.4 GHz-2.5 GHz frequency band, the S31 parameter is less than -20 dB, indicating that the isolation between the two antennas in the 2.4 GHz-2.5 GHz frequency band is greater than 20 dB.

[0298] Figure 19 It is the antenna pattern of the antenna assembly in the 2.45GHz frequency band. Figure 20 It is the antenna pattern of the antenna assembly in the 5.2GHz frequency band. Figure 21 It is the antenna pattern of the antenna assembly in the 5.8 GHz frequency band.

[0299] Figures 19-21 In the figure, the solid line is the horizontal plane pattern, also known as the magnetic plane (H-plane) pattern. The dashed line is the vertical plane pattern, also known as the electric plane (E-plane) pattern. The circumferential coordinate is the antenna azimuth, in degrees (°). The circumferential coordinate scale is 0°, 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, and 330°, respectively. The vertical coordinate is the gain, in dBi.

[0300] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An antenna assembly (100), characterized in that: The antenna assembly (100) comprises: A first substrate (110) and a second substrate (120), wherein the first substrate (110) and the second substrate (120) are arranged along a thickness direction of the first substrate (110); a surface of the first substrate (110) close to the second substrate (120) is a first surface (101); and a surface of the second substrate (120) close to the first substrate (110) is a second surface (102); A first antenna (210), disposed on the first substrate (110); A second antenna (220), disposed on the second substrate (120); a first feeding line (310), wherein a first feeding end (311) of the first feeding line (310) is used to feed the first antenna (210); a vertical projection of the first feeding end (311) on the first surface (101) is a first area; a second feeding line (320), wherein a second feeding end (321) of the second feeding line (320) is used to feed the second antenna (220); a vertical projection of the second feeding end (321) on the first surface (101) is a second area; and An isolation structure (130), the isolation structure (130) comprising at least one first isolation member (131), the first isolation member (131) being arranged on the first surface (101) or the second surface (102); a vertical projection of each first isolation member (131) in the isolation structure (130) on the first surface (101) covering one of the first area or the second area.

2. The antenna assembly (100) according to claim 1, characterized in that The first isolation member (131) includes an open resonant ring; and / or the first isolation member (131) includes a conductive sheet.

3. The antenna assembly (100) according to claim 2, characterized in that The circumference of the split resonant ring or the circumference of the conductive sheet is: 0.8 times λ-1.2 times λ; When the vertical projection of the first isolator (131) on the first surface (101) covers the first area, λ is the dielectric waveguide wavelength corresponding to the center frequency of the first antenna (210); When the vertical projection of the first isolating member (131) on the first surface (101) covers the second area, λ is the dielectric waveguide wavelength corresponding to the center frequency of the second antenna (220).

4. The antenna assembly (100) according to claim 1, characterized in that In a case where a vertical projection of the first isolating member (131) on the first surface (101) covers the first area, the first isolating member (131) is arranged on the first surface (101); In a case where a vertical projection of the first isolating member (131) on the first surface (101) covers the second area, the first isolating member (131) is arranged on the second surface (102).

5. The antenna assembly (100) according to claim 1, characterized in that There is a gap between the first surface (101) and the second surface (102); or, the first surface (101) and the second surface (102) are in contact.

6. The antenna assembly (100) according to claim 1, characterized in that The antenna assembly (100) further comprises a dielectric plate, wherein the dielectric plate is located between the first surface (101) and the second surface (102).

7. The antenna assembly (100) according to claim 1, characterized in that The first antenna (210) is located on a surface of the first substrate (110) opposite to the first surface (101); and the second antenna (220) is located on a surface of the second substrate (120) opposite to the second surface (102).

8. The antenna assembly (100) according to claim 1, characterized in that The first antenna (210) comprises a first series feed line (201), a first branch (211), a second branch (212), a third branch (213) and a fourth branch (214); a gap is provided between the first branch (211) and the second branch (212), and a gap is provided between the third branch (213) and the fourth branch (214); The first feeding end (311) is used to feed the first branch node (211) and the second branch node (212), and the first branch node (211) and the second branch node (212) feed the third branch node (213) and the fourth branch node (214) through the first series feeding line (201); the vertical projection of the end of the first series feeding line (201) close to the third branch node (213) on the first surface (101) is a third area; The isolation structure (130) further includes: a second isolation member (132), the second isolation member (132) being arranged on the first surface (101) or the second surface (102); and a vertical projection of the second isolation member (132) on the first surface (101) covering the third area.

9. The antenna assembly (100) according to claim 8, characterized in that A vertical projection of an end portion of the first series feeder (201) close to the first branch (211) on the first surface (101) is a fourth area; In the case where the vertical projection of the first isolating member (131) on the first surface (101) covers the first area, the vertical projection of the first isolating member (131) on the first surface (101) also covers the fourth area.

10. The antenna assembly (100) according to claim 8, characterized in that The first antenna (210) further includes a second series feed line (202), a fifth branch (215), and a sixth branch (216), wherein a gap is provided between the fifth branch (215) and the sixth branch (216); The third branch node (213) and the fourth branch node (214) feed the fifth branch node (215) and the sixth branch node (216) via the second series feeder (202); a vertical projection of an end of the second series feeder (202) close to the fifth branch node (215) on the first surface (101) is a fifth area; The isolation structure (130) further includes: a third isolation member (133), wherein the third isolation member (133) is arranged on the first surface (101) or the second surface (102); and a vertical projection of the third isolation member (133) on the first surface (101) covers the fifth area.

11. The antenna assembly (100) according to any one of claims 1-10, characterized in that The second antenna (220) is a monopole antenna or a dipole antenna.

12. The antenna assembly (100) according to any one of claims 1-10, characterized in that The antenna assembly (100) further comprises: a third antenna (230) and a third feeder (330), wherein the third antenna (230) is arranged on the second substrate (120); A third feeding line (330), wherein a third feeding end (331) of the third feeding line (330) is used to feed the third antenna (230).

13. The antenna assembly (100) according to claim 12, characterized in that A vertical projection of the third feeding end (331) on the first surface (101) is a sixth area; The isolation structure (130) further includes a fourth isolation member (134), wherein the fourth isolation member (134) is arranged on the first surface (101) or the second surface (102); a vertical projection of the fourth isolation member (134) on the first surface (101) covers the sixth area.

14. The antenna assembly (100) according to claim 12, characterized in that The third antenna (230) is a monopole antenna or a dipole antenna.

15. The antenna assembly (100) according to claim 12, characterized in that The center frequency of the first antenna (210) is less than the center frequency of the second antenna (220), and the center frequency of the first antenna (210) is less than the center frequency of the third antenna (230).

16. The antenna assembly (100) according to claim 12, characterized in that The difference between the center frequency of the first antenna (210) and the center frequency of any one of the center frequencies of the second antenna (220) and the center frequency of the third antenna (230) is greater than the difference between the center frequency of the second antenna (220) and the center frequency of the third antenna (230).

17. The antenna assembly (100) according to claim 12, characterized in that The difference between the center frequency of the second antenna (220) and the center frequency of any one of the center frequencies of the first antenna (210) and the third antenna (230) is greater than the difference between the center frequency of the first antenna (210) and the center frequency of the third antenna (230); The vertical projections of the third antenna (230) and the first antenna (210) on the first surface (101) do not overlap.

18. The antenna assembly (100) according to any one of claims 1-10, characterized in that The first feed line (310) includes an inner conductor and an outer conductor that are electrically isolated, one of the inner conductor and the outer conductor being used for transmitting signals for the first antenna (210), and the other being used for grounding the first antenna (210), and the first feed end (311) including an end of the inner conductor connected to the first antenna (210) and an end of the outer conductor connected to the first antenna (210).

19. A network device (10), characterized in that The network device (10) comprises: a single board (11) and the antenna assembly (100) according to any one of claims 1 to 18, wherein the first feed line (310) and the second feed line (320) are both electrically connected to the single board (11).

20. The network device (10) according to claim 19, characterized in that The network device (10) further comprises a housing structure (12), wherein the antenna assembly (100) and the single board (11) are both located in the housing structure (12).

21. The network device (10) according to claim 19, characterized in that The network device (10) further comprises: a housing structure (12), the single board (11) is located inside the housing structure (12), and the first substrate (110) and the second substrate (120) are both located outside the housing structure (12).

22. The network device (10) according to claim 20, characterized in that The network device (10) further comprises a protective shell (13), wherein the protective shell (13) is located outside the housing structure (12), and the first substrate (110) and the second substrate (120) are both located inside the protective shell (13).

23. The network device (10) according to any one of claims 19 to 22, characterized in that The thickness direction of the first substrate (110) is perpendicular to the thickness direction of the single board (11), or the thickness direction of the first substrate (110) is parallel to the thickness direction of the single board (11).

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