Antenna assembly, and fiber-to-the-room access device

Abstract

Provided in the present application are an antenna assembly, and a fiber-to-the-room (FTTR) access device. The antenna assembly (100) comprises a first dipole antenna (101), a second dipole antenna (102), a first connection structure (010), a second connection structure (020) and a feed line (210), wherein the feed line (210) supplies power to the first dipole antenna (101) and the second dipole antenna (102) by means of the first connection structure (010) and the second connection structure (020); and the first connection structure (010) and the second connection structure (020) are formed in two parallel lines. Signals from the feed line respectively pass through the two parallel lines to reach two slots, and then supply power to realize parallel feeding. The signals reaching the two slots have equal amplitudes and the same phase, such that the stability of a directional diagram of the antenna assembly can be ensured, thereby effectively improving the antenna performance of multiple antennas. The antenna assembly integrates antennas in two or more frequency bands and has a high level of integration, and therefore the antenna assembly can be used in scenarios such as FTTR at various frequency bands of WLAN.

Description

An antenna assembly and a fiber-to-the-room access device

[0001] This application claims priority to Chinese Patent Application No. 202421639504.3, filed on July 11, 2024, entitled "An Antenna Assembly and Fiber to the Room Access Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of antenna technology, and more particularly to an antenna assembly and a fiber-to-the-room access device. Background Technology

[0003] Wireless local area networks (WLANs) are widely used in homes, offices, and other indoor / outdoor environments. In multi-link operation (MLO) scenarios, multiple frequencies operate and connect simultaneously during communication between the wireless communication system and the terminal, greatly improving communication stability and throughput. MLO requires multiple antennas operating in corresponding frequency bands, thus increasing the number and complexity of antennas.

[0004] In multi-antenna structures, the performance of the antennas directly affects the communication performance. Therefore, improving the performance of the antennas in multi-antenna components is an urgent problem to be solved.

[0005] Utility Model Content

[0006] This application provides an antenna assembly and a fiber-to-the-room access device, which aims to improve the performance of antennas in a multi-antenna assembly.

[0007] To achieve the above objectives, this application adopts the following technical solution.

[0008] In a first aspect, embodiments of this application provide an antenna assembly. The antenna assembly includes a substrate, two first dipole antennas, two second dipole antennas, a first connecting structure, a second connecting structure, and a first feed line. The two first dipole antennas are disposed on the substrate, each first dipole antenna including a first stub and a second stub. The two second dipole antennas are disposed on the substrate. Each second dipole antenna includes a third stub and a fourth stub. The two first stubs are connected one-to-one with the two fourth stubs, and the two second stubs are connected one-to-one with the two third stubs. Both the first connecting structure and the second connecting structure are disposed on the substrate. The first stub of one first dipole antenna and the first stub of the other first dipole antenna are respectively connected to opposite ends of the first connecting structure. The second stub of one first dipole antenna and the second stub of the other first dipole antenna are respectively connected to opposite ends of the second connecting structure. The first feed line is used to feed the two first dipole antennas and the two second dipole antennas, and the first connection structure and the second connection structure are both connected to the first feed line.

[0009] Thus, the first feed line feeds two first dipole antennas and two second dipole antennas through the first and second connecting structures. The two branches of the first dipole antennas and the two branches of the second dipole antennas are connected one-to-one. One first dipole antenna and one second dipole antenna share a single slot. The signal transmitted through the first feed line reaches the two slots through the first and second connecting structures respectively, achieving parallel feeding. The signals reaching the two slots have equal amplitude and phase, ensuring the stability of the antenna assembly's radiation pattern and effectively improving the performance of the multi-antenna configuration.

[0010] In conjunction with the first aspect, in some implementable embodiments, the first connection structure includes a connected first L-shaped microstrip line and a connected first straight microstrip line; the second connection structure includes a connected second L-shaped microstrip line and a connected second straight microstrip line. The first L-shaped microstrip line is connected to a first stub of a first dipole antenna; the first straight microstrip line is connected to the first stub of another first dipole antenna. The second L-shaped microstrip line is connected to a second stub of a first dipole antenna, and the second straight microstrip line is connected to the second stub of another first dipole antenna. Thus, the first L-shaped microstrip line and the first straight microstrip line are respectively connected to two first stubs, and the second L-shaped microstrip line and the second straight microstrip line are respectively connected to two second stubs. L-shaped and straight microstrip lines are advantageous for reducing signal loss in the line.

[0011] In conjunction with the first aspect, in some feasible implementations, one straight edge of the first L-shaped microstrip line is parallel to the extending direction of the second straight microstrip line, and the vertical projection of the second straight microstrip line on the substrate overlaps with the vertical projection of the first L-shaped microstrip line on the substrate. Thus, the first L-shaped microstrip line and the second straight microstrip line can be considered as parallel double lines, which is beneficial for improving the integration density of the antenna assembly and reducing its size.

[0012] In conjunction with the first aspect, in some feasible ways, there is a gap between the first branch and the second branch, and the first straight microstrip line is perpendicular to the extension direction of the gap.

[0013] In conjunction with the first aspect, in some achievable embodiments, the substrate includes opposing first and second surfaces; the first L-shaped microstrip line and the second L-shaped microstrip line are located on the first surface, and the first straight microstrip line and the second straight microstrip line are located on the second surface.

[0014] In conjunction with the first aspect, in some feasible embodiments, the antenna assembly further includes: a first antenna and a second feed line, the first antenna being disposed on the substrate; the second feed line being used to feed the first antenna. Thus, the number of antennas integrated in the antenna assembly increases, and the number of operating frequency bands of the antenna assembly increases.

[0015] In conjunction with the first aspect, in some feasible implementations, the first antenna is a monopole antenna or a dipole antenna. Thus, the antenna assembly provided in the embodiments of this application can be adapted to various types of first antennas.

[0016] In conjunction with the first aspect, in some feasible embodiments, the difference between any one of the center frequencies of the first antenna and the second dipole antenna and the center frequency of the first dipole antenna is greater than the difference between the center frequencies of the first antenna and the second dipole antenna. Thus, compared to the first antenna, the second dipole antenna, with its larger center frequency difference, shares the same feed line with the first dipole antenna, resulting in less crosstalk between the two antennas.

[0017] In conjunction with the first aspect, in some feasible embodiments, the second feed line and the first feed line are respectively disposed on opposite sides of the substrate. This provides a larger distribution space for the second dipole antenna, the first dipole antenna, and the third antenna, allowing for the design of antennas with different shapes or wiring configurations.

[0018] In conjunction with the first aspect, in some feasible ways, the openings of the two first dipole antennas face opposite directions; or, the openings of the two second dipole antennas face opposite directions. In this way, equal-radius and in-phase signal distribution can be achieved from the two symmetrically placed first dipole antennas.

[0019] Secondly, embodiments of this application provide a fiber-to-the-room access device. The fiber-to-the-room access device includes a housing and any of the antenna components provided in the first aspect. The housing encloses a mounting cavity, and the antenna component is disposed within the mounting cavity. Due to the high integration and excellent isolation of the antenna component, the size of the fiber-to-the-room access device can be reduced, and its communication performance can be improved. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the structure of the optical communication network provided in an embodiment of this application.

[0021] Figure 2 is a schematic diagram of the structure of an antenna assembly provided in an embodiment of this application.

[0022] Figure 3 is a distribution diagram of various components on the first and second surfaces provided in the embodiments of this application.

[0023] Figure 4 is a schematic diagram of another antenna assembly provided in an embodiment of this application.

[0024] Figure 5 is a schematic diagram of the first feeder line, the first connection structure, and the second connection structure provided in the embodiments of this application.

[0025] Figure 6 is a projection relationship diagram of the first L-shaped microstrip line and the second straight microstrip line provided in the embodiments of this application.

[0026] Figure 7 is another distribution diagram of the components on the first and second surfaces provided in the embodiments of this application.

[0027] Figure 8 shows the S-parameters of the antenna assembly in the 2.3GHz-2.6GHz frequency band.

[0028] Figure 9 shows the S-parameters of the antenna assembly in the 5.0 GHz-6.0 GHz frequency band.

[0029] Figure 10 shows the antenna radiation pattern of the antenna assembly in the 2.4 GHz band.

[0030] Figure 11 shows the antenna radiation pattern of the antenna assembly in the 5.2 GHz band.

[0031] Figure 12 shows the antenna radiation pattern of the antenna assembly in the 5.8 GHz band.

[0032] In the figure: 100 - Antenna assembly; 101 - First dipole antenna; 102 - Second dipole antenna; 103 - First antenna; 210 - First feed line; 211 - Outer conductor; 212 - Inner conductor; 220 - Second feed line; 110 - Substrate; 111 - First surface; 112 - Second surface; 200 - Slot; 230 - Connection end; 201 - First stub; 202 - Second stub; 203 - Third stub; 204 - Fourth stub; 301 - First L-shaped microstrip line; 302 - Second L-shaped microstrip line ; 303-First straight microstrip line; 304-Second straight microstrip line; 401-Feed section; 402-First monopole arm; 403-Inverter; 404-Second monopole arm; 405-First oscillator arm; 406-Second oscillator arm; 407-Third oscillator arm; 408-Fourth oscillator arm; 120-First isolator; 130-Second isolator; 409-First microstrip line; 410-Second microstrip line; 010-First connection structure; 020-Second connection structure; 030-First gap; 001-Conductive via. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0034] In the following description, 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 technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0035] Antenna return loss can be expressed as S 11 To represent by parameters, S 11 It belongs to one type of S-parameter. 11 The reflection coefficient is a parameter that characterizes the efficiency of an antenna's transmission.

[0036] In some embodiments, the characterization S can be... 11 The diagram is interpreted as a schematic representation of the resonance produced by the antenna. In some embodiments, S is characterized 11 The resonance shown in the figure, in the portion less than -10dB, can be interpreted as the resonant frequency range generated by the antenna. 11 The parameter is usually negative, S 11 The smaller the parameter, the lower the antenna return loss, the less energy the antenna reflects back, which means more energy actually enters the antenna, and the higher the system efficiency; S 11 The larger the parameter, the greater the antenna return loss and the lower the antenna system efficiency.

[0037] Communication band / operating band: Regardless of the type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna that supports the B40 band operates within the frequency range of 2300MHz to 2400MHz, or in other words, the antenna's operating band includes the B40 band.

[0038] The resonant frequency range or resonant frequency band may be the same as or may partially overlap with the operating frequency band. In one embodiment, one or more resonant frequency bands of the antenna may cover one or more operating frequency bands of the antenna.

[0039] It should be noted that in engineering, S is generally used. 11 The value is -8dB as the standard, when the S of the line 11 When the value is less than -8dB, the antenna can be considered to be working normally, or its transmission efficiency can be considered to be good. It should be understood that, in engineering practice, S is generally used as a benchmark. 11 A value of -10dB is used as the standard for the S value of the day line. 11 When the value is less than -10dB, the antenna can be considered to be working normally, or the antenna can be considered to have good transmission efficiency.

[0040] Isolation: Isolation is the ratio of the signal received by one antenna through another to the signal received by the transmitting antenna. It's a physical quantity used to measure the degree of mutual coupling between antennas. Assuming two antennas form a two-port network, the isolation between the two antennas is S_interval between them. 21 S 12 Antenna isolation can be expressed as S. 21 S 12 Parameter representation. S 21 S 12 The parameter is usually a negative number. S 21 S 12 The smaller the parameter, the greater the isolation between antennas and the smaller the mutual coupling between antennas; S 21 S 12 A larger parameter indicates lower isolation between antennas and greater mutual coupling. Antenna isolation depends on factors such as antenna radiation pattern, spatial distance between antennas, and antenna gain.

[0041] The feed section is the combination of all components of an antenna used for receiving and transmitting radio frequency (RF) waves. In the case of a receiving antenna, the feed section can be considered the antenna section from the first amplifier to the front-end transmitter. In a transmitting antenna, the feed section can be seen as the section after the last power amplifier. In some cases, the term "feed section" is narrowly interpreted as the RF chip, or the transmission path including the RF chip to the feed point on the radiator or transmission line. The feed unit has the function of converting radio waves into electrical signals and sending them to the receiver components. Generally, it is considered part of the antenna used to convert radio waves into electrical signals and vice versa. Antenna design should consider the maximum power transfer possibility and efficiency. For this purpose, the antenna feed impedance must be matched with the load resistance. The antenna feed impedance is a combination of resistance, capacitance, and inductance. To ensure maximum power transfer conditions, the two impedances (load resistance and feed impedance) should be matched. Matching can be achieved by considering frequency requirements and antenna design parameters such as gain, directivity, and radiation efficiency.

[0042] Antenna pattern: also known as radiation pattern. It refers to the graph showing the relative field strength (normalized modulus) of the antenna radiation field as a function of direction at a fixed distance from the low-frequency antenna. It is usually represented by two mutually perpendicular planar patterns passing through the direction of maximum radiation of the antenna.

[0043] Antenna radiation patterns typically have multiple radiating beams. The beam with the highest radiating intensity is called the main lobe, and the remaining beams are called side lobes. Among the side lobes, the side lobe in the opposite direction to the main lobe is also called the back lobe.

[0044] dB: This stands for decibel, a logarithmic concept with base 10. Decibels are used to evaluate the proportional relationship between two physical quantities; they themselves have no physical dimensions. For every 10-fold increase in the ratio between two quantities, their difference can be expressed as 10 decibels. For example: A = 100, B = 10, C = 5, D = 1, then A / D = 20 dB; B / D = 10 dB; C / D = 7 dB; B / C = 3 dB. In other words, a 10-decibel difference between two quantities is a 10-fold difference, a 20-decibel difference is a 100-fold difference, and so on. A 3-decibel difference is a 2-fold difference between the two quantities.

[0045] dBi: Usually mentioned together with dBd. dBi and dBd are units of power gain, both relative values, but with different reference points. The reference point for dBi is an omnidirectional antenna; the reference point for dBd is a dipole. Generally, dBi and dBd are considered to represent the same gain, but the value expressed in dBi is 2.15 dBi larger than that expressed in dBd. For example, for an antenna with a gain of 16 dBd, its gain converted to dBi is 18.15 dBi, generally ignoring the decimal places, hence 18 dBi.

[0046] 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 called the E-aperture) and the direction of maximum radiation. The electric field, or "E" plane, determines the polarization or direction of 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 the H-plane should be 90 degrees apart.

[0047] Magnetic Plane (H-Plane): Also known as the H-plane, the magnetic plane is the plane containing the magnetic field vector (also called the H-aperture) and the direction of maximum radiation. In a linearly polarized antenna, the magnetizing field, or "H" plane, is perpendicular 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.

[0048] Medium wavelength: Due to the presence of a medium, the electromagnetic parameters of the medium (e.g., dielectric constant and permeability) are different from those in a vacuum. The propagation speed of electromagnetic waves in a medium is different from that in a vacuum, that is, their wavelengths are different. The propagation wavelength in a medium is called the medium wavelength.

[0049] Figure 1 is a schematic diagram of the structure of an optical communication network provided in an embodiment of this application. This optical communication network can also be called an optical transmission network. The optical communication network includes multiple network devices, one or more of which are used to connect to user terminals. A terminal can also be called a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), or station (STA), etc.

[0050] In some embodiments, the terminal may be a mobile phone, tablet computer, computer with wireless transceiver function, personal communication service (PCS) telephone, desktop computer, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in smart home, etc.

[0051] Network devices can be routing and forwarding devices with optical communication capabilities, such as routers or switches. Network devices can also be broadband network gateways (BNGs) or broadband remote access servers (BRASs) with optical communication capabilities.

[0052] Terminals can access the server using network devices. In room 1 as shown in Figure 1, users can use their terminals to establish a communication connection with the network devices using wireless-fidelity (WIFI) technology, enabling the terminals to send data packets to the server. The same applies to room 2 in Figure 1. For example, the network devices communicate with each terminal via WIFI, and the network devices are interconnected via fiber optic cables.

[0053] In some possible scenarios, the terminal may also use optical communication technology to establish a communication connection with the radio access network (RAN) (not shown in Figure 1) and access the server.

[0054] Network devices connect to the server wirelessly or via wired connections. The embodiments of this application do not limit the number of terminal devices, network devices, and servers included in the optical communication network.

[0055] For example, this application can be applied to fiber-to-the-room (FTTR) scenarios.

[0056] This embodiment uses a whole-house fiber optic scenario as an example to illustrate the bandwidth allocation method of the optical communication network provided in this application. A whole-house fiber optic scenario can be achieved through FTTR technology. FTTR refers to using optical fiber instead of network cables, laying optical fiber to every room, deploying optical network equipment to interconnect with the home gateway, and combining wireless technology to ensure whole-house network coverage.

[0057] For example, the network device includes a housing and an antenna assembly, the housing being configured into a mounting cavity, and the antenna assembly being disposed within the mounting cavity. The antenna assembly is used to receive and transmit signals.

[0058] In scenarios where multiple frequencies operate simultaneously, such as in multi-link operation (MLO) scenarios, multiple frequencies work and connect simultaneously during communication between the wireless communication system and the terminal, greatly improving communication stability and throughput.

[0059] To achieve communication across n frequency bands (where n is a natural number greater than or equal to 2), n antennas operating in the corresponding frequency bands are required, significantly increasing the number and complexity of antennas in network equipment. While integrating antennas across multiple frequency bands can improve the integration level of network equipment, the problem of crosstalk between antennas in multiple frequency bands also becomes increasingly apparent.

[0060] The antenna assembly provided in this application integrates antennas of multiple frequency bands, which improves integration and reduces crosstalk between antennas.

[0061] Figure 2 is a schematic diagram of an antenna assembly 100 provided in an embodiment of this application. Referring to Figure 2, the antenna assembly 100 includes a substrate 110, a first dipole antenna 101, a second dipole antenna 102, a first antenna 103, a first feed line 210, and a second feed line 220. The first dipole antenna 101, the second dipole antenna 102, and the first antenna 103 are all disposed on the substrate 110. The first feed line 210 is used to feed the first dipole antenna 101 and the second dipole antenna 102, and the second feed line 220 is used to feed the first antenna 103.

[0062] The number of first dipole antennas 101 is two, and the number of second dipole antennas 102 is also two. This application embodiment does not limit the number of first antennas 103.

[0063] In the embodiments of this application, the first antenna 103 is not necessary, the antenna assembly 100 may not include the first antenna 103, and the antenna assembly 100 may not include the second feed line 220 that feeds the first antenna 103.

[0064] For example, the substrate 110 can be an insulating board or a plate with a certain dielectric constant. In one embodiment, the substrate 110 can be a circuit board, such as a printed circuit board (PCB). For example, the substrate 110 can also include an epoxy glass cloth laminate (FR-4), an epoxy resin board, etc. The shape of the substrate 110 can be arbitrary, such as a square plate, a circular plate, an elliptical plate, and an irregularly shaped plate.

[0065] The substrate 110 has a first surface 111 and a second surface 112 disposed opposite to each other. In the embodiments of this application, the first dipole antenna 101 may be disposed on the first surface 111 or the second surface 112, or a portion of the structure of the first dipole antenna 101 may be disposed on the first surface 111 and a portion of the structure may be disposed on the second surface 112. The second dipole antenna 102 and the first antenna 103 are disposed similarly. In other words, the embodiments of this application do not limit the distribution relationship of the first dipole antenna 101, the second dipole antenna 102, and the first antenna 103 on the first surface 111 and the second surface 112.

[0066] In some embodiments of this application, the difference between the center frequency of the first antenna 103 and the center frequency of the second dipole antenna 102 and the center frequency of the first dipole antenna 101 is greater than the difference between the center frequency of the first antenna 103 and the center frequency of the second dipole antenna 102. In other words, the difference between the center frequency of the first dipole antenna 101 and the center frequency of the first antenna 103 is greater than the difference between the center frequency of the first antenna 103 and the center frequency of the second dipole antenna 102. Furthermore, the difference between the center frequency of the first dipole antenna 101 and the center frequency of the second dipole antenna 102 is greater than the difference between the center frequency of the first antenna 103 and the center frequency of the second dipole antenna 102. It is understood that the aforementioned differences are positive numbers; if the difference is negative, the absolute value of the negative number is taken.

[0067] Thus, the difference in center frequencies between the first dipole antenna 101 and the second dipole antenna 102, which are fed through the same feed line (first feed line 210), is relatively large, and the crosstalk between the first dipole antenna 101 and the second dipole antenna 102 is relatively small.

[0068] The aforementioned "center frequency" refers to the median of the antenna's operating frequency band.

[0069] In this embodiment, the center frequencies of the first dipole antenna 101, the second dipole antenna 102, and the first antenna 103 are not limited, but are set according to the working scenario of the antenna assembly 100.

[0070] For example, the first dipole antenna 101 operates in a communication frequency band including 2.4 GHz. For instance, the operating frequency band of the first dipole antenna 101 can be 2.4 GHz to 2.5 GHz. The second dipole antenna 102 operates in a communication frequency band including 5.2 GHz; for example, the operating frequency band of the second dipole antenna 102 is 5.15 GHz to 5.4 GHz. The first antenna 103 operates in a communication frequency band including 5.8 GHz; for example, the operating frequency band of the first antenna 103 is 5.7 GHz to 5.85 GHz. Thus, the antenna assembly can cover various frequency bands of the WLAN, thereby improving the bandwidth and adaptability of the antenna assembly and communication equipment. This can improve the throughput performance and stability of the antenna assembly 100.

[0071] In some embodiments, the second dipole antenna 102 operates in the frequency band of 5.15 GHz to 5.85 GHz, and the first antenna 103 operates in the frequency band of 5.925 GHz to 7.125 GHz.

[0072] Alternatively, in some embodiments, the operating frequency bands of the second dipole antenna 102 and the first antenna 103 can be interchanged. This application embodiment uses the example of the second dipole antenna 102 operating in a communication frequency band including 5.2 GHz and the first antenna 103 operating in a communication frequency band including 5.8 GHz for illustrative purposes.

[0073] In the example of Figure 2, the first dipole antenna 101 and the second dipole antenna 102 are disposed on the first surface 111, and the first antenna 103 is disposed on the second surface 112. This makes efficient use of both surfaces of the substrate 110, resulting in a more compact antenna assembly 100. Furthermore, both the first dipole antenna 101 and the second dipole antenna 102 are fed by the first feed line 210, and since the first dipole antenna 101 and the second dipole antenna 102 are disposed on the same surface, the wiring of the first feed line 210 is simplified.

[0074] In some embodiments, the first antenna 103 is a dipole antenna. In some embodiments, the first antenna 103 is a monopole antenna.

[0075] Figure 3 is a distribution diagram of various components on the first surface 111 and the second surface 112 provided in an embodiment of this application. Referring to Figure 3, each first dipole antenna 101 includes a first stub 201 and a second stub 202, with a slot 200 between the first stub 201 and the second stub 202. Similarly, each second dipole antenna 102 includes a third stub 203 and a fourth stub 204; the slot 200 extends between the third stub 203 and the fourth stub 204. In other words, the first dipole antenna 101 and the second dipole antenna 102 share the slot 200. Alternatively, the slot 200 can be viewed as follows: a portion is located between the first stub 201 and the second stub 202, and another portion is located between the third stub 203 and the fourth stub 204.

[0076] Two first branches 201 and two fourth branches 204 are connected in a one-to-one correspondence. Two second branches 202 and two third branches 203 are connected in a one-to-one correspondence.

[0077] In embodiments of this application, the antenna assembly 100 further includes a first connection structure 010 and a second connection structure 020. A first branch 201 of one first dipole antenna 101 and a first branch 201 of another first dipole antenna 101 are respectively connected to opposite ends of the first connection structure 010. A second branch 202 of one first dipole antenna 101 and a second branch 202 of another first dipole antenna 101 are respectively connected to the second connection structure 020.

[0078] Thus, the first feed line 210 feeds two first dipole antennas 101 and two second dipole antennas 102 through the first connection structure 010 and the second connection structure 020. The two branches of the first dipole antenna 101 and the two branches of the second dipole antenna 102 are connected one-to-one. One first dipole antenna 101 and one second dipole antenna 102 share a single slot 200. The signal transmitted by the first feed line 210 reaches the two slots 200 through the first connection structure 010 and the second connection structure 020 respectively, achieving parallel feeding. The signals reaching the two slots 200 are of equal amplitude and in phase, ensuring the stability of the antenna assembly's radiation pattern and effectively improving the performance of the multi-antenna configuration.

[0079] The aforementioned "multiple antennas" refers to the number of antennas in antenna assembly 100 being greater than or equal to 2.

[0080] The width of the slit 200 is not limited in this embodiment. The coupling capacitance between the first dipole antenna 101 and the second dipole antenna 102 can be adjusted by setting the width of the slit 200.

[0081] The end of the second feed line 220 that connects to the first antenna 103 is the connection end 230. In other words, the connection end 230 of the second feed line 220 is directly connected to the first antenna 103. In some embodiments, the connection end 230 can be regarded as the feed end of the first antenna 103.

[0082] In some embodiments of this application, the antenna assembly 100 may further include a first isolator 120. The first isolator 120 is disposed on the substrate 110, and the vertical projection of the first isolator 120 on the substrate 110 is located between the slot 200 and the connection end 230.

[0083] The aforementioned "vertical projection of the first spacer 120 on the substrate 110" refers to the projection of the first spacer 120 onto the substrate 110 along a direction perpendicular to the surface of the substrate 110. The other descriptions of "vertical projection" in this document are similar.

[0084] The vertical projection of the first spacer 120 on the substrate 110 is located between the gap 200 and the connection end 230. This means that, in embodiments where the gap 200 and the connection end 230 are on the same surface of the substrate 110, the projection of the first spacer 120 on that surface of the substrate 110 is located between the gap 200 and the connection end 230. In embodiments where the gap 200 and the connection end 230 are on different surfaces of the substrate 110, on the same surface of the substrate 110, the vertical projection of the first spacer 120 is located between the vertical projection of the gap 200 and the vertical projection of the connection end 230.

[0085] Wherein, along a direction perpendicular to the extension direction of the slot 200, the slot 200 has a region between the vertical projection of the first surface 111 and the vertical projection of the connection end 230 on the first surface 111, and the vertical projection of the first isolator 120 on the first surface 111 is located in this region, so that the first isolator 120 has excellent isolation between the first antenna 103 and the second dipole antenna 102.

[0086] Compared to the center frequency of the first dipole antenna 101, the center frequency of the second dipole antenna 102 is closer to the center frequency of the first antenna 103. Therefore, the signals from the second dipole antenna 102 and the first antenna 103 are more prone to mutual interference. The first isolator 120, with its vertical projection located between the slot 200 and the connection end 230 of the second dipole antenna 102, can effectively reduce the aforementioned interference and improve the isolation between the second dipole antenna 102 and the first antenna 103. This allows the antenna assembly 100 to have three operating frequency bands, while reducing adjacent channel interference and improving antenna performance. Furthermore, compared to setting three antennas independently, integrating the three frequency bands into the antenna assembly 100 is more beneficial for multi-link operation. It also helps reduce the performance requirements of devices such as RF front-end filters and duplexers.

[0087] In the embodiments of this application, the first isolator 120 may be disposed on the first surface 111 of the substrate 110 or on the second surface 112 of the substrate 110. Alternatively, a portion of the first isolator 120 may be located on the first surface 111, and another portion may be located on the second surface 112 of the substrate 110, with the portion on the first surface 111 and the portion on the second surface 112 electrically connected through a conductive via. Furthermore, the first isolator 120 may be located on the same surface of the substrate 110 as the second dipole antenna 102, and the first isolator 120 may be located on the same surface of the substrate 110 as the first antenna 103; this embodiment of the application does not impose any limitations on this.

[0088] In some embodiments of this application, the vertical projection of any one of the first branch 201, the second branch 202, the third branch 203, and the fourth branch 204 onto the substrate 110 does not overlap with the vertical projection of the first spacer 120 onto the substrate 110. Thus, the first spacer 120 provides better isolation.

[0089] It is understood that, in some embodiments of this application, based on the condition that the vertical projection of the first isolation member 120 is located between the vertical projection of the gap 200 and the vertical projection of the connecting end 230, the vertical projections of some branches of the first branch 201, the second branch 202, the third branch 203 and the fourth branch 204 on the substrate 110 may overlap with the vertical projection of the first isolation member 120 on the substrate 110.

[0090] In some embodiments of this application, the first isolator 120 includes a conductive material. For example, the material of the first isolator 120 includes copper, aluminum, stainless steel, brass, gold foil, silver-plated copper, etc. The first dipole antenna 101, the second dipole antenna 102, and the first antenna 103 are all not in contact with the first isolator 120.

[0091] For example, the total length of the first isolator 120 is 0.15 times λ1 to 0.35 times λ1, where λ1 is the dielectric waveguide wavelength corresponding to the center frequency of the first antenna 103. For instance, the total length of the first isolator 120 can be 0.15 times λ1, 0.18 times λ1, 0.19 times λ1, 0.2 times λ1, 0.21 times λ1, 0.22 times λ1, 0.25 times λ1, 0.28 times λ1, 0.3 times λ1, 0.31 times λ1, 0.32 times λ1, or 0.35 times λ1, etc. In this way, the first isolator 120 can effectively reduce the crosstalk between the first antenna 103 and the second dipole antenna 102. The first isolator 120 can be considered as a quarter-wavelength resonator of λ1.

[0092] The embodiments of this application do not limit the extension path of the first isolation member 120. For example, the extension path can be a straight line, a broken line, a curve, or an irregular line. The aforementioned "total length of the first isolation member 120" refers to the total length of the extension path of the first isolation member 120.

[0093] As shown in Figure 3, the extension path of the first isolation member 120 is L-shaped; in other words, the first isolation member 120 is an L-shaped component.

[0094] In some embodiments of this application, the antenna assembly 100 may further include a second isolator 130 disposed on the substrate 110, and the second isolator 130 is not in contact with the first isolator 120. The vertical projection of the second isolator 130 on the substrate 110 is located between the slot 200 and the connection end 230.

[0095] Thus, the second isolator 130 and the first isolator 120 can together improve the isolation between the second dipole antenna 102 and the first antenna 103, and the second isolator 130 and the first isolator 120 have the function of decoupling.

[0096] The phrase "the vertical projection of the second isolator 130 on the substrate 110 is located between the gap 200 and the connection end 230" is similar to the description of "the vertical projection of the first isolator 120 on the substrate 110 is located between the gap 200 and the connection end 230" mentioned above, and will not be repeated here.

[0097] The total length of the second isolator 130 is 0.15 times λ2 to 0.35 times λ2, where λ2 is the dielectric waveguide wavelength corresponding to the center frequency of the second dipole antenna 102.

[0098] For example, the total length of the second isolator 130 can be 0.15 times λ², 0.18 times λ², 0.19 times λ², 0.2 times λ², 0.21 times λ², 0.22 times λ², 0.25 times λ², 0.28 times λ², 0.3 times λ², 0.31 times λ², 0.32 times λ², or 0.35 times λ². In this way, the second isolator 130 can effectively reduce the crosstalk between the first antenna 103 and the second dipole antenna 102. The second isolator 130 can be considered as a quarter-wavelength resonator of λ².

[0099] Similar to the first isolator 120 mentioned above, the extension path of the second isolator 130 is not limited in this embodiment. For example, the extension path can be a straight line, a broken line, a curve, or an irregular line. The aforementioned "total length of the second isolator 130" refers to the total length of the extension path of the first isolator 120. In the example of Figure 3, the second isolator 130 is a U-shaped member, the opening direction of which is perpendicular to the slot 200, and the opening direction of which is opposite to the slot 200. In this way, the second isolator 130 can further improve the isolation between the second dipole antenna 102 and the first antenna 103. The total length of the second isolator 130 mentioned above is the total length of the U-shaped member.

[0100] In an embodiment where the antenna assembly 100 has only one isolator, the isolator can be the structure of the first isolator 120 in FIG3, or it can be the U-shaped part shown in the second isolator 130.

[0101] A gap 200 is provided between a first dipole antenna 101 and a second dipole antenna 102, and the gap closest to the connection end 230 is the first gap 030. The vertical projection of the aforementioned first isolator 120 on the substrate 110 lies between the gap 200 and the connection end 230.

[0102] As stated above, in the embodiments of this application, the first antenna 103 is not necessary. In embodiments where the antenna assembly 100 does not include the first antenna 103, both the first isolator 120 and the second isolator 130 may be omitted.

[0103] Figure 4 is a schematic diagram of another antenna assembly 100 provided in an embodiment of this application. The difference between Figure 4 and Figure 3 is that in the example of Figure 4, the antenna assembly 100 does not include the first antenna 103, the first isolator 120, and the second isolator 130. For the remaining structures in Figure 4, please refer to the description in Figure 3, which will not be repeated here.

[0104] In the example of Figure 3, the openings of the two first dipole antennas 101 are oriented in opposite directions, thus enabling a more uniform signal distribution between the two first dipole antennas 101. The signals from the first dipole antennas 101 can be received well in multiple directions. The aforementioned opening direction of the first dipole antenna 101 refers to the direction in which the slits of the first dipole antenna 101 extend towards the two branches of the dipole (first branch 201 and second branch 202).

[0105] Similarly, in some embodiments, the openings of the two second dipole antennas 102 are oriented in opposite directions.

[0106] The embodiments of this application do not limit the structure of the first connection structure 010 and the second connection structure 020. As shown in FIG3, the first connection structure 010 includes a first L-shaped microstrip line 301 and a first straight microstrip line 303, and the second connection structure 020 includes a second L-shaped microstrip line 302 and a second straight microstrip line 304.

[0107] The aforementioned "microstrip line" is a type of microwave transmission line. This microstrip line is a conductor structure that can be manufactured using thin-film technology.

[0108] Figure 5 is a schematic diagram of the structure of the first feed line 210, the first connection structure 010, and the second connection structure 020 provided in an embodiment of this application. Referring to Figure 5, the first L-shaped microstrip line 301 and the first straight microstrip line 303 are connected. Exemplarily, the first L-shaped microstrip line 301 and the first straight microstrip line 303 are connected through a conductive via 001. The conductive via 001 penetrates the substrate (not shown in Figure 5).

[0109] Similarly, the second L-shaped microstrip line 302 and the second straight microstrip line 304 are connected. For example, the second L-shaped microstrip line 302 and the second straight microstrip line 304 are connected via a conductive via 001.

[0110] This application does not limit the formation process of the first L-shaped microstrip line 301, the second L-shaped microstrip line 302, the first straight microstrip line 303, and the second straight microstrip line 304. For example, the first L-shaped microstrip line 301, the second L-shaped microstrip line 302, the first straight microstrip line 303, and the second straight microstrip line 304 can be formed by printing.

[0111] This application embodiment does not limit the materials of the first L-shaped microstrip line 301, the second L-shaped microstrip line 302, the first straight microstrip line 303, and the second straight microstrip line 304. For example, the materials of the first L-shaped microstrip line 301, the second L-shaped microstrip line 302, the first straight microstrip line 303, and the second straight microstrip line 304 can be nickel, copper, aluminum, copper alloys, or aluminum alloys, etc.

[0112] The first feed line 210 is connected to a first L-shaped microstrip line 301 and a first stub 201 of a first dipole antenna 101 (as shown in Figure 3). The first L-shaped microstrip line 301 is connected to a first straight microstrip line 303 and a first stub 201 of another first dipole antenna 101. Since the first stub 201 and the fourth stub 204 are connected, it is clear that there is also a circuit connection between the first L-shaped microstrip line 301 and the fourth stub 204.

[0113] The first feed line 210 is also connected to a second stub 202 of a first dipole antenna 101 via a second L-shaped microstrip line 302 (as shown in Figure 3). The second L-shaped microstrip line 302 is connected to a second stub 202 of another first dipole antenna 101 via a second straight microstrip line 304. Similarly, since the second stub 202 is connected to the third stub 203, the second L-shaped microstrip line 302 and the fourth stub 204 are also electrically connected. In this way, the first feed line 210 feeds the two first dipole antennas 101 and the two second dipole antennas 102.

[0114] In other words, after the signal from the first feed line 210 is transmitted to the first L-shaped microstrip line 301, it is divided into two parts. One part is transmitted to the first stub 201 of a first dipole antenna 101, and the other part is transmitted through the first straight microstrip line 303 to the second stub 202 of another first dipole antenna 101. Similarly, after the signal from the first feed line 210 is transmitted to the second L-shaped microstrip line 302, it is divided into two parts. One part is transmitted to the second stub 202 of a first dipole antenna 101, and the other part is transmitted through the second straight microstrip line 304 to the first stub 201 of another first dipole antenna 101.

[0115] Thus, the second L-shaped microstrip line 302, the second straight microstrip line 304, the first L-shaped microstrip line 301, and the first straight microstrip line 303 can be regarded as power dividers, distributing the signal of the first feed line 210 to the two first dipole antennas 101 with relatively low signal loss.

[0116] Please refer back to Figure 3. In some embodiments of this application, the first L-shaped microstrip line 301 and the second L-shaped microstrip line 302 are located on the first surface 111. The first straight microstrip line 303 and the second straight microstrip line 304 are located on the second surface 112. Thus, the arrangement space for the first L-shaped microstrip line 301, the second L-shaped microstrip line 302, the first straight microstrip line 303, and the second straight microstrip line 304 is relatively large.

[0117] The first L-shaped microstrip line 301 is L-shaped, meaning it includes two perpendicular straight sides. The first straight microstrip line 303 is straight.

[0118] In some embodiments, one straight edge of the first L-shaped microstrip line 301 is parallel to the slot 200, and the other straight edge is perpendicular to the slot 200.

[0119] For example, one straight edge of the first L-shaped microstrip line 301 and the second straight microstrip line 304 extend in parallel directions. Furthermore, the vertical projection of the straight edge onto the substrate 110 overlaps with the vertical projection of the second straight microstrip line 304 onto the substrate.

[0120] Figure 6 is a projection relationship diagram of the first L-shaped microstrip line and the second straight microstrip line provided in the embodiment of this application. Referring to Figure 6, the vertical projection of one straight edge of the first L-shaped microstrip line on the first surface 111 is located in region C1, and the vertical projection of the second straight microstrip line on the first surface 111 is located in region C2. Regions C1 and C2 overlap.

[0121] Figure 6 is merely an illustration of the relationship between the vertical projection of a straight edge of the first L-shaped microstrip line and the second straight microstrip line onto the first surface 111, and is not intended to limit the size ratio of the vertical projection of the straight edge of the first L-shaped microstrip line and the second straight microstrip line onto the first surface 111.

[0122] Thus, the signal output from the first feed line 210, the first L-shaped microstrip line 301 and the second straight microstrip line 304 can be regarded as a parallel double line, and the second L-shaped microstrip line 302 and the first straight microstrip line 303 can be regarded as another parallel double line. After passing through the two parallel double lines, the signals reach the two slots 200 respectively and are then fed, realizing parallel feeding. The signals reaching the two slots 200 are of equal amplitude and in phase, which can ensure the stability of the antenna assembly pattern.

[0123] Furthermore, in an embodiment where the openings of the two first dipole antennas 101 face opposite directions, the second L-shaped microstrip line 302 and the second straight microstrip line 304, the first L-shaped microstrip line 301 and the first straight microstrip line 303 can realize differential signals. This allows for equal-radius and in-phase signal distribution between the two symmetrically placed first dipole antennas.

[0124] In some embodiments, the width of one straight side of the first L-shaped microstrip line 301 and the width of the second straight microstrip line 304 are the same.

[0125] Similarly, the relationship between the second L-shaped microstrip line 302 and the first straight microstrip line 303 is the same as the relationship between the first L-shaped microstrip line 301 and the second straight microstrip line 304 mentioned above, and will not be repeated here.

[0126] This application does not limit the structure of the first feed line 210. In Figure 5, the first feed line 210 includes an outer conductor 211 and an inner conductor 212. The outer conductor 211 is disposed outside the inner conductor 212, and an insulating layer is provided between the outer conductor 211 and the inner conductor 212. The inner conductor 212 is electrically connected to the first L-shaped microstrip line 301, and the outer conductor 211 is electrically connected to the second L-shaped microstrip line 302. Exemplarily, the inner conductor 212 and the first L-shaped microstrip line 301 can be connected by a solder layer, conductive adhesive, etc. The outer conductor 211 and the second L-shaped microstrip line 302 can be connected by a solder layer, conductive adhesive, etc. In some embodiments, the first feed line 210 can be considered as a coaxial cable.

[0127] In the embodiment shown in Figure 3, the first antenna 103 is a monopole antenna. Exemplarily, the first antenna 103 includes a feed section 401, a first monopole arm 402, an inverter 403, and a second monopole arm 404. The structure of the second feed line 220 is described in the preceding description of the first feed line 210.

[0128] One end of the first monopole arm 402 is connected to the inner conductor of the second feed line 220, and the other end of the first monopole arm 402 is connected to the phase inverter 403. The end of the phase inverter 403 away from the first monopole arm 402 is connected to the second monopole arm 404. The outer conductor of the second feed line 220 is connected to the feed section 401. The feed section 401 has a U-shaped structure, with the opening of the U-shape facing the first isolator 120.

[0129] In the example of Figure 3, the power supply unit 401, the first monopole arm 402, the phase inverter 403, and the second monopole arm 404 are all disposed on the second surface 112.

[0130] In Figure 3, the first feed line 210 at positions G1 and G2 is not in direct electrical contact with the first dipole antenna. Position G3 is the connection point between the outer conductor of the first feed line 210 and the second L-shaped microstrip line 302. Position G4 is the connection point between the inner conductor of the first feed line 210 and the first L-shaped microstrip line 301. The second feed line 220 at position G5 is not in direct electrical contact with the first antenna. Position G6 is the connection point between the outer conductor of the second feed line 220 and the feed section 401. Position G7 is the connection point between the inner conductor of the second feed line 220 and the first monopole arm 402.

[0131] The aforementioned connection end 230 is the end closer to the gap 200 between position G7 and position G6. In Figure 3, the outer conductor of the second feed line 220 is close to the end of the first antenna 103, that is, the second feed line 220 at position G6.

[0132] In some embodiments of this application, the first antenna 103 may be a dipole antenna.

[0133] Figure 7 is another distribution diagram of the various components on the first surface 111 and the second surface 112 provided in the embodiment of this application. The difference between Figure 7 and Figure 3 includes that the structure of the first antenna 103 is different. For the remaining structures, please refer to the description in the example shown in Figure 3 above, and it will not be repeated here.

[0134] In the embodiment shown in Figure 7, the first antenna 103 includes two dipole antennas connected in series. The first antenna 103 includes a first dipole arm 405, a second dipole arm 406, a third dipole arm 407, and a fourth dipole arm 408. The first dipole arm 405 and the second dipole arm 406 can be considered as the first element of a dipole antenna. The third dipole arm 407 and the fourth dipole arm 408 can be considered as the second dipole arm of another dipole antenna.

[0135] The first vibrating arm 405 and the third vibrating arm 407 are disposed on the first surface 111. The second vibrating arm 406 and the fourth vibrating arm 408 are disposed on the second surface 112. The first antenna 103 also includes a first microstrip line 409 and a second microstrip line 410. One end of the fourth vibrating arm 408 is connected to the first microstrip line 409, and the second vibrating arm 406 is not in contact with the first microstrip line 409. The first vibrating arm 405 and the third vibrating arm 407 are connected through the second microstrip line 410; the extension directions of the first microstrip line 409 and the second microstrip line 410 are parallel, and the vertical projections of the first microstrip line 409 and the second microstrip line 410 on the first surface 111 overlap. The aforementioned first microstrip line 409 and the second microstrip line 410 can be regarded as parallel double lines.

[0136] The outer conductor of the second feed line 220 is connected to the second vibrator arm 406. The inner conductor of the second feed line 220 is connected to the first microstrip line 409.

[0137] It is understood that in other embodiments, the first antenna 103 may be other antenna structures, and this application does not limit this.

[0138] The antenna assembly 100 with three operating frequency bands provided in this application has advantages such as high integration, high isolation, and low adjacent channel interference. It can effectively improve the system throughput performance and stability of network devices.

[0139] The performance of the antenna assembly 100 shown in Figure 3 is described below with reference to Figures 8-12.

[0140] Figure 8 shows the S-parameters of the antenna assembly in the 2.3GHz-2.6GHz frequency band. In Figure 8, port 1 is the port connected to the first feed line. Port 2 is the port connected to the second feed line. As can be seen from Figure 8, when S... 11 When the parameter is less than -10dB, it indicates that port 1 is impedance matched; therefore, the operating frequency of the first dipole antenna is 2.38GHz-2.51GHz.22 A parameter greater than -10dB indicates an impedance mismatch at port 2, therefore the first antenna is inoperable in the 2.3GHz-2.6GHz frequency band. 21 A parameter less than -14dB indicates that the isolation between port 1 and port 2 is greater than 14dB within the 2.4GHz-2.5GHz frequency band.

[0141] Figure 9 shows the S-parameters of the antenna assembly in the 5.0 GHz-6.0 GHz frequency band. Port 1 of the S-parameters is the port connected to the first feed line. As mentioned above, the first dipole antenna and the second dipole antenna share the first feed line. Port 2 is the port connected to the second feed line. In Figure 9, the S... 11 This refers to the operating bandwidth curve of the second dipole antenna, within the 5.15GHz-5.4GHz frequency band, S 11 The parameter being less than -10dB indicates that the second dipole antenna operates in the frequency band of 5.15GHz-5.4GHz. 22 This refers to the operating bandwidth curve of the first antenna, within the 5.7GHz-5.85GHz frequency band, S 22 A parameter less than -10dB indicates that the first antenna operates in the 5.7GHz-5.85GHz frequency band. 21 This refers to the isolation curve between the second dipole antenna and the first antenna. Within the 5.0GHz-6.0GHz frequency band, S... 21 The parameter is less than -30dB. Therefore, the isolation between port 1 and port 2 is greater than 30dB in the 5.0GHz-6.0GHz frequency band.

[0142] Figure 10 shows the antenna radiation pattern of the antenna assembly in the 2.4 GHz band. The dashed line represents the magnetic plane (H-plane), and the solid line represents the electric plane (E-plane). In Figure 10, the radial coordinates represent the antenna gain, in dBi. The radial coordinate scales are -25.0 dBi, -20.0 dBi, -15.0 dBi, -10.0 dBi, -5.0 dBi, and 0.0 dBi, as shown in Figure 10. The circumferential coordinates represent the antenna azimuth, in degrees (°). The circumferential coordinate scales are 0°, 30°, 60°, 90°, 120°, 150°, -180°, -150°, -120°, -90°, -60°, and -30°, as shown in Figure 10.

[0143] Figure 11 shows the antenna radiation pattern of the antenna assembly in the 5.2 GHz band. Similarly, in Figure 11, the dashed line represents the magnetic plane (H-plane), and the solid line represents the electric plane (E-plane). The radial coordinates represent the antenna gain, in dBi. The radial coordinate scales are -15 dBi, -10 dBi, -5 dBi, 0 dBi, and 5 dBi, as shown in Figure 11. The circumferential coordinates represent the antenna azimuth, in degrees (°). The circumferential coordinate scales are 0°, 30°, 60°, 90°, 120°, 150°, -180°, -150°, -120°, -90°, -60°, and -30°, as shown in Figure 11.

[0144] Figure 12 shows the antenna radiation pattern of the antenna assembly in the 5.8 GHz band. Similarly, in Figure 12, the dashed line represents the magnetic plane (H-plane), and the solid line represents the electrical plane (E-plane). The radial coordinates represent the antenna gain, in dBi. The radial coordinate scales are -15 dBi, -10 dBi, -5 dBi, 0 dBi, and 5 dBi, as shown in Figure 12. The circumferential coordinates represent the antenna azimuth, in degrees (°). The circumferential coordinate scales are 0°, 30°, 60°, 90°, 120°, 150°, -180°, -150°, -120°, -90°, -60°, and -30°, as shown in Figure 12.

[0145] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An antenna assembly, characterized in that, The antenna assembly includes: substrate; Two first dipole antennas are disposed on the substrate, each of the first dipole antennas including a first stub and a second stub; Two second dipole antennas are disposed on the substrate, each second dipole antenna including a third stub and a fourth stub; the two first stubs are connected to the two fourth stubs in a one-to-one correspondence, and the two second stubs are connected to the two third stubs in a one-to-one correspondence; Both the first connecting structure and the second connecting structure are disposed on the substrate; the first branch of one first dipole antenna and the first branch of another first dipole antenna are respectively connected to the opposite ends of the first connecting structure; the second branch of one first dipole antenna and the second branch of another first dipole antenna are respectively connected to the opposite ends of the second connecting structure; and A first feed line is used to feed the two first dipole antennas and the two second dipole antennas, and both the first connection structure and the second connection structure are connected to the first feed line.

2. The antenna assembly according to claim 1, characterized in that, The first connection structure includes a first L-shaped microstrip line and a first straight microstrip line connected together; the second connection structure includes a second L-shaped microstrip line and a second straight microstrip line connected together. The first L-shaped microstrip line is connected to the first stub of the first dipole antenna; The first straight microstrip line is connected to the first stub of another first dipole antenna; The second L-shaped microstrip line is connected to the second stub of one of the first dipole antennas, and the second straight microstrip line is connected to the second stub of another of the first dipole antennas.

3. The antenna assembly according to claim 2, characterized in that, One straight edge of the first L-shaped microstrip line is parallel to the extension direction of the second straight microstrip line, and the vertical projection of the second straight microstrip line on the substrate overlaps with the vertical projection of the first L-shaped microstrip line on the substrate.

4. The antenna assembly according to claim 2, characterized in that, There is a gap between the first branch and the second branch, and the first straight microstrip line is perpendicular to the extension direction of the gap.

5. The antenna assembly according to claim 2, characterized in that, The substrate includes a first surface and a second surface opposite to each other; the first L-shaped microstrip line and the second L-shaped microstrip line are located on the first surface, and the first straight microstrip line and the second straight microstrip line are located on the second surface.

6. The antenna assembly according to any one of claims 1-5, characterized in that, The antenna assembly further includes: a first antenna and a second feed line, wherein the first antenna is disposed on the substrate; and the second feed line is used to feed power to the first antenna.

7. The antenna assembly according to claim 6, characterized in that, The first antenna is a monopole antenna or a dipole antenna.

8. The antenna assembly according to claim 6, characterized in that, The difference between the center frequency of the first antenna and the center frequency of the second dipole antenna and the center frequency of the first dipole antenna is greater than the difference between the center frequency of the first antenna and the center frequency of the second dipole antenna.

9. The antenna assembly according to claim 6, characterized in that, The second feed line and the first feed line are respectively disposed on opposite sides of the substrate.

10. The antenna assembly according to any one of claims 1-5, characterized in that, The openings of the two first dipole antennas face opposite directions; Alternatively, the openings of the two second dipole antennas may face opposite directions.

11. A fiber-to-the-room access device, characterized in that, The fiber-to-the-room access device includes a housing and an antenna assembly as described in any one of claims 1-10, wherein the housing is configured as a mounting cavity and the antenna assembly is disposed within the mounting cavity.

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