Antenna assembly and communication device

Abstract

The present application relates to the technical field of wireless communications, and specifically relates to an antenna assembly and a communication device. The present application aims to simplify the wiring, mounting and fabrication of an antenna. Provided in the embodiments of the present application is an antenna assembly, which comprises a first antenna and a second antenna, wherein the first antenna comprises a first metal layer, a second metal layer and a first feed structure, propagates a first signal and generates a magnetic current; and the second antenna comprises a first suspended ridge, the first feed structure, a first opening and a second opening, such that an electric current is generated on the wall of the first metal layer and the wall of the second metal layer, and the electric current generates a second signal. The size of the first opening, the size of the second opening and the position of the first suspended ridge are adjusted, such that the amplitude of the first signal is equal to that of the second signal; and the first antenna and the second antenna share the first feed structure, and an electric current and a magnetic current perform co-directional excitation and have an intrinsic 90° phase difference, such that the phase difference between the first signal and the second signal is 90°, thereby realizing circular polarization, and simplifying the wiring, mounting and fabrication of an antenna.

Description

Antenna assembly and communication equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on March 20, 2024, with application number 202410327587.0 and application name “An antenna assembly and communication device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of wireless communication technology, and more particularly to an antenna assembly and a communication device. Background Art

[0003] In communication systems, both transmitting and receiving antennas are generally circularly polarized to ensure communication performance. In related art, antennas typically have two feed points, simultaneously feeding signals with the same amplitude and a 90° phase difference to both feed points, enabling the antenna to generate a circularly polarized signal. However, the presence of two feed points in related art complicates the wiring connecting the antennas, making installation and manufacturing difficult. Summary of the Invention

[0004] The embodiments of the present application provide an antenna assembly and a communication device that can simplify the wiring, installation, and manufacturing of the antenna.

[0005] In a first aspect, an embodiment of the present application provides an antenna assembly, comprising a first antenna assembly. The first antenna assembly comprises a first metal layer and a second metal layer, the first metal layer being provided with a first opening, the second metal layer being arranged parallel to and spaced apart from the first metal layer, the second metal layer being provided with a second opening, and both the first metal layer and the second metal layer being configured to be grounded. The first antenna assembly further comprises a first suspension ridge, the first suspension ridge being arranged between the first metal layer and the second metal layer, the first suspension ridge being spaced apart from the first metal layer and the second metal layer, and the first suspension ridge being located between the first opening and the second opening; the first suspension ridge is configured to radiate signals outside the first antenna assembly. The first antenna assembly further comprises a first feeding structure, the first feeding structure being arranged between the first metal layer and the second metal layer, and the first feeding structure being used to feed power to the first metal layer and the second metal layer. The first antenna assembly includes a first antenna and a second antenna, the first antenna including: a first metal layer, a second metal layer, and a first feeding structure, the first antenna is used to generate a first signal; the second antenna includes: a first suspended ridge, a first opening, and a second opening, the second antenna is used to generate a second signal, the first signal and the second signal have equal amplitudes and a phase difference of 90°.

[0006] Through the above-mentioned setting, the first antenna includes a first metal layer, a second metal layer and a first feeding structure. The first metal layer, the second metal layer and the first feeding structure together form a propagation structure of a substrate integrated waveguide, which propagates the first signal while generating a magnetic current in a direction perpendicular to the first metal layer; the second antenna includes a first suspended ridge, a first feeding structure, a first opening and a second opening. The first metal layer and the second metal layer near the first opening and the second opening constitute a dipole-like structure, so that the walls of the first metal layer and the second metal layer are oriented in the same direction, and the oriented current generates a second signal; by adjusting the size of the first opening and the second opening and the position of the first suspended ridge, the amplitudes of the first signal and the second signal can be made equal. At the same time, since the first antenna and the second antenna share the first feeding structure, the current and the magnetic current are excited in the same direction, and the oriented current and the magnetic current have a 90° phase difference, so that the phase difference between the first signal and the second signal is 90°, thereby realizing circular polarization of the antenna assembly and simplifying the wiring, installation and production of the antenna.

[0007] In some embodiments that may include the above embodiments, the first antenna assembly further includes a first dielectric layer, the first dielectric layer is disposed between the first metal layer and the second metal layer, and the first suspended ridge is disposed within the first dielectric layer.

[0008] With this arrangement, the first dielectric layer can protect the first suspension ridge and isolate the first suspension ridge, the first metal layer and the second metal layer to prevent them from contacting each other, thereby improving the insulation inside the first antenna component.

[0009] In some embodiments that may include the above embodiments, the first feeding structure includes a first feeding ring, the first feeding ring is arranged in the first dielectric layer, a first via is provided on the first dielectric layer, the center line of the first via is perpendicular to the first metal layer, and the first feeding ring surrounds the outer circumference of the first via.

[0010] With this configuration, the first feeding structure can transmit electromagnetic waves from the first stripline through the first feeding loop to the first via, feeding the first and second metal layers through the first via. Furthermore, the first feeding structure can adjust the filter passband and suppression by adjusting the size distribution, thereby affecting the isolation between different-frequency antenna components and the matching of the antennas.

[0011] In some embodiments that may include the above embodiments, the first antenna assembly further includes a first filter, the first filter is coupled to the first feed loop, and the first filter is configured to allow only radio frequency signals of the first frequency to be transmitted to the first feed loop.

[0012] In this way, the first filter is configured to only allow RF signals of the first frequency to be transmitted to the first feed loop. At the same time, the first filter can act as a reflector for RF signals of other frequencies to prevent interference between RF signals of various frequencies and improve the port isolation of the first antenna assembly.

[0013] In some embodiments that may include the above-mentioned embodiments, there are multiple first antenna components, and the multiple first antenna components are arranged at intervals along a direction parallel to the first metal layer. The first metal layers of each first antenna component are arranged on the same layer, and the second metal layers of each first antenna component are arranged on the same layer.

[0014] With such an arrangement, multiple first antenna components can form an antenna array, thereby increasing the gain of the antenna and enhancing the directivity of the antenna.

[0015] In some embodiments that may include the above embodiments, the antenna assembly further includes a second antenna assembly. The second antenna assembly includes a third metal layer and a fourth metal layer, the third metal layer being provided with a third opening; the fourth metal layer being arranged parallel to and spaced apart from the third metal layer, the fourth metal layer being provided with a fourth opening, and both the third metal layer and the fourth metal layer being configured to be grounded; the second antenna assembly further includes a second suspension ridge, the second suspension ridge being arranged between the third metal layer and the fourth metal layer, the second suspension ridge being spaced apart from both the third metal layer and the fourth metal layer, and the second suspension ridge being located between the third opening and the fourth opening, and the second suspension ridge being configured to radiate signals outward from the second antenna assembly; the second antenna assembly further includes a second feed structure, the second feed structure being arranged between the third metal layer and the fourth metal layer, and the second feed structure being configured to feed power to the third metal layer and the fourth metal layer. The second antenna assembly includes a third antenna and a fourth antenna. The third antenna includes a third metal layer, a fourth metal layer, and a second feed structure. The third antenna is configured to generate a third signal. The fourth antenna includes a second suspended ridge, a third opening, and a fourth opening. The fourth antenna is configured to generate a fourth signal. The third signal and the fourth signal have equal amplitudes and a 90° phase difference. The second metal layer is disposed opposite the third metal layer, and the second and third metal layers are disposed parallel to and spaced apart from each other.

[0016] In this way, the third antenna includes a third metal layer, a fourth metal layer and a second feeding structure. The third metal layer, the fourth metal layer and the second feeding structure together form a propagation structure of a substrate integrated waveguide, which propagates the third signal while generating a magnetic current in a direction perpendicular to the third metal layer; the fourth antenna includes a second suspended ridge, a second feeding structure, a third opening and a fourth opening. The third metal layer and the fourth metal layer near the third opening and the fourth opening constitute a dipole-like structure, so that the walls of the third metal layer and the fourth metal layer are oriented in the same direction, and the oriented current generates a fourth signal; by adjusting the size of the third opening and the fourth opening and the position of the second suspended ridge, the amplitudes of the third signal and the fourth signal can be made equal. At the same time, since the third antenna and the fourth antenna share the second feeding structure, the current and the magnetic current are excited in the same direction, and the current and the magnetic current of the oriented current have a 90° phase difference, so that the phase difference between the third signal and the fourth signal is 90°, thereby achieving circular polarization of the antenna assembly.

[0017] In some embodiments that may include the above embodiments, the antenna assembly further includes a metal floor, which is arranged between the second metal layer and the third metal layer, and the second metal layer and the third metal layer are both in contact with the metal floor; the metal floor is spaced apart from the second opening and the third opening.

[0018] This arrangement places the metal floor in contact with the second and third metal layers, grounding them. The metal floor also features a retaining hole, reinforcing the connection between the first antenna assembly, the metal floor, and the second antenna assembly, ensuring close contact. Furthermore, the metal floor allows the antenna assembly to increase the amplitude of the vertical polarization of the first and second antenna assemblies, ensuring that the amplitudes of the horizontal and vertical polarizations of the antenna assemblies are equal, thereby improving circular polarization purity.

[0019] In some embodiments that may include the above embodiments, there are multiple second antenna assemblies, and the multiple second antenna assemblies are arranged at intervals in a direction parallel to the third metal layer. The third metal layers of the second antenna assemblies are arranged on the same layer, and the fourth metal layers of the second antenna assemblies are arranged on the same layer.

[0020] With this arrangement, multiple second antenna components can form an antenna array, thereby increasing the gain of the antenna and enhancing the directivity of the antenna.

[0021] In some embodiments that may include the above embodiments, there are multiple first antenna assemblies and multiple second antenna assemblies, and the multiple first antenna assemblies and the multiple second antenna assemblies are alternately arranged along a direction perpendicular to the first metal layer.

[0022] This arrangement, where multiple first antenna assemblies and multiple second antenna assemblies are alternately arranged to form an antenna array, can improve antenna gain and enhance antenna directivity. Furthermore, the metal floor can be used to reflect vertically polarized signals and absorb horizontally polarized signals entering the planar waveguide, thereby compensating for the vertically polarized signals.

[0023] In some embodiments that may include the above embodiments, the second antenna assembly further includes a second dielectric layer, the second dielectric layer is disposed between the third metal layer and the fourth metal layer, and the second suspension ridge is disposed within the second dielectric layer.

[0024] In this configuration, the second dielectric layer can protect the second suspension ridge and isolate the second suspension ridge, the third metal layer and the fourth metal layer to prevent them from contacting each other, thereby improving the insulation inside the second antenna assembly.

[0025] In some embodiments that may include the above embodiments, the second feeding structure includes a second feeding ring, the second feeding ring is arranged in the second dielectric layer, a second via is provided on the second dielectric layer, the center line of the second via is perpendicular to the third metal layer, and the second feeding ring surrounds the outer circumference of the second via.

[0026] With this configuration, the second feeding structure can transmit electromagnetic waves from the second stripline through the second feed loop to the second via, feeding the third and fourth metal layers through the second via. Furthermore, the second feeding structure can adjust the filter passband and suppression by adjusting the size distribution, thereby affecting the isolation between different-frequency antenna components and the matching of the antennas.

[0027] In some embodiments that may include the above embodiments, the second antenna assembly further includes a second filter coupled to the second feed loop, the second filter being configured to allow only radio frequency signals of the second frequency to be transmitted to the second feed loop.

[0028] With this arrangement, the second filter is configured to allow only RF signals of the second frequency to be transmitted to the second feed loop. At the same time, the second filter can act as a reflector for RF signals of other frequencies, preventing crosstalk between RF signals of various frequencies and improving the port isolation of the second antenna assembly.

[0029] In some embodiments that may include the above embodiments, the first antenna assembly signal includes a first signal and a second signal, the second antenna assembly signal includes a third signal and a fourth signal, the first antenna assembly signal includes left-hand circular polarization and the second antenna assembly signal includes right-hand circular polarization, or the first antenna assembly signal includes right-hand circular polarization and the second antenna assembly signal includes left-hand circular polarization.

[0030] Such an arrangement can improve the isolation between the adjacent first antenna components and the second antenna components.

[0031] In a second aspect, an embodiment of the present application provides a communication device, comprising a housing and the antenna assembly of any of the above embodiments, wherein the housing encloses an installation cavity, and the antenna assembly is disposed in the installation cavity.

[0032] The communication device provided in the embodiments of the present application includes the antenna assembly in any of the above embodiments, so the two can solve the same technical problems and achieve the same technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG1 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0034] FIG2 is a first structural diagram of an antenna assembly provided in an embodiment of the present application;

[0035] FIG3 is a structural diagram 1 of a first antenna assembly provided in an embodiment of the present application;

[0036] FIG4 is a schematic structural diagram of a first feeding structure provided in an embodiment of the present application;

[0037] FIG5 is a schematic structural diagram of a first filter provided in an embodiment of the present application;

[0038] FIG6 is a second structural diagram of the first antenna assembly provided in an embodiment of the present application;

[0039] FIG7 is a first structural diagram of a second antenna assembly provided in an embodiment of the present application;

[0040] FIG8 is a second structural diagram of an antenna assembly provided in an embodiment of the present application;

[0041] FIG9 is a schematic structural diagram of a metal floor provided in an embodiment of the present application;

[0042] FIG10 is a second structural diagram of a second antenna assembly provided in an embodiment of the present application;

[0043] FIG11 is a third structural diagram of an antenna assembly provided in an embodiment of the present application;

[0044] FIG12 is a schematic structural diagram of a second feeding structure provided in an embodiment of the present application.

[0045] Explanation of reference numerals: 10: communication device; 11: housing; 20: antenna assembly; 21: first antenna assembly; 22: second antenna assembly; 31: first metal layer; 32: second metal layer; 311: first opening; 321: second opening; 41: first suspended ridge; 51: first feeding structure; 511: first via; 512: first stripline; 513: first feeding loop; 61: first dielectric layer; 71: first filter; 711: first stripline Branch; 712: second stripline branch; 713: third stripline branch; 33: third metal layer; 34: fourth metal layer; 331: third opening; 341: fourth opening; 42: second suspended ridge; 52: second feeding structure; 521: second via; 522: second stripline; 23: metal floor; 231: limiting hole; 24: planar waveguide; 62: second dielectric layer; 523: second feeding loop; 72: second filter. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0047] In the following, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first," "second," etc. may explicitly or implicitly include one or more of the features.

[0048] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left", "right", "horizontal" and "vertical" are defined relative to the orientation of the components 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.

[0049] The following explains the terms that may appear in the embodiments of the present application.

[0050] Connect / connected: should be understood in a broad sense. For example, "connection" can be a fixed connection, an electrical connection, a coupling, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0051] Coupling: can be understood as direct coupling and / 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 board (PCB) copper foil or wires that can transmit electrical signals; "indirect coupling" can be understood as two conductors being electrically conductive in an airless / non-contact manner. In one embodiment, indirect coupling can also be referred to as capacitive coupling, for example, signal transmission is achieved by forming an equivalent capacitance through coupling between the gap between two conductive parts.

[0052] Opposite / oppositely arranged: A and B are arranged opposite to each other, which may mean that A and B are arranged face-to-face. For example, when two radiators are arranged opposite each other, at least a portion of the radiators overlap along a certain direction. In one embodiment, the two oppositely arranged radiators are adjacent to each other, with no other radiators or conductive objects other than antenna structures positioned between them.

[0053] Ground / Floor: This generally refers to at least a portion of any grounding layer, grounding plate, or grounding metal layer within an electronic device (such as a mobile phone), or at least a portion of any combination of any of the above grounding layers, grounding plates, or grounding components. "Ground / Floor" can be used to ground components within the electronic device. In one embodiment, "ground / floor" can include any one or more of the following: the grounding layer of the electronic device's circuit board, the grounding plate formed by the electronic device's midframe, the grounding metal layer formed by the metal film below the screen, the conductive grounding layer of the battery, and conductive or metal parts electrically connected to the above grounding layer / grounding plate / metal layer. In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12-to-14-layer board having 8, 10, 12, 13, or 14 layers of conductive material, or an element separated and electrically insulated by a dielectric layer or insulating layer such as fiberglass, polymer, or the like. In one embodiment, the circuit board includes a dielectric substrate, a grounding layer, and a trace layer, with the trace layer and the grounding layer being electrically connected via vias. In one embodiment, components such as a display, touch screen, input buttons, transmitter, processor, memory, battery, charging circuit, and system-on-chip (SoC) structures can be mounted on or connected to a circuit board, or electrically connected to a trace layer and / or ground layer in the circuit board. For example, a radio frequency source can be located on the trace layer.

[0054] Any of the above-mentioned grounding layers, grounding plates, or grounding metal layers are made of a conductive material. In one embodiment, the conductive material can be any of the following: copper, aluminum, stainless steel, brass, and alloys thereof, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, a graphite-coated substrate, a copper-plated substrate, a brass-plated substrate, and an aluminum-plated substrate. Those skilled in the art will appreciate that the grounding layer / grounding plate / grounding metal layer can also be made of other conductive materials.

[0055] Grounding refers to coupling to the ground / floor in any manner. In one embodiment, grounding can be achieved through physical grounding, such as physical grounding at a specific location on the frame using a portion of the midframe's structural components (or referred to as a physical ground). In one embodiment, grounding can be achieved through device grounding, such as through a series or parallel connection of a capacitor, inductor, or resistor (or referred to as a device ground).

[0056] Referring to Figure 1 , an embodiment of the present application provides a communication device 10 comprising a housing 11 and an antenna assembly 20. The housing 11 defines a mounting cavity, and the antenna assembly 20 is disposed within the mounting cavity. The housing 11 secures the antenna assembly 20 and also protects and seals the antenna assembly 20. The present embodiment of the application does not limit the communication device 10. For example, the communication device 10 may include a mobile phone, a vehicle, an unmanned aerial vehicle, a communication base station, or the like. The communication device 10 receives and transmits signals via the antenna assembly 20. In an implementation where the antenna assembly 20 is disposed on a vehicle, the housing 11 may be disposed on the vehicle body, and the antenna assembly 20 may be connected to the vehicle's onboard host, enabling the onboard host to communicate with user terminals, satellites, communication base stations, and other devices via the antenna assembly 20. Accordingly, the onboard host may utilize the antenna assembly 20 to implement vehicle positioning and navigation functions.

[0057] Referring to FIG2 , an embodiment of the present application provides an antenna assembly 20 including a first antenna assembly 21. Referring to FIG3 , the first antenna assembly 21 includes a first metal layer 31 and a second metal layer 32. The projections of the first metal layer 31 and the second metal layer 32 on a plane parallel to the first metal layer 31 completely overlap. The first metal layer 31 is provided with a first opening 311, which is located at the top of the first metal layer 31. The second metal layer 32 is provided parallel to and spaced apart from the first metal layer 31. The second metal layer 32 is provided with a second opening 321, which is located at the top of the second metal layer 32. The projections of the second opening 321 and the first opening 311 in a direction perpendicular to the first metal layer 31 do not completely overlap. The first metal layer 31 and the second metal layer 32 are both configured to be grounded.

[0058] It is understood that the first opening 311 can be formed on the first metal layer 31 by etching, milling, or laser drilling. Similarly, the second opening 321 can be formed on the second metal layer 32 by etching, milling, or laser drilling. The projections of the first opening 311 and the second opening 321 on a plane parallel to the first metal layer 31 do not completely overlap. In other words, the projections of the first opening 311 and the second opening 321 on a plane parallel to the first metal layer 31 may not overlap, but may partially overlap.

[0059] Exemplarily, in an implementation method in which the projections of the first opening 311 and the second opening 321 on a plane parallel to the first metal layer 31 do not overlap, in an embodiment in which the first opening 311 is arranged on the top left side of the first metal layer 31 and the length d1 of the first opening 311 is less than or equal to half of the width L1 of the first metal layer 31, the second opening 321 is arranged on the top right side of the second metal layer 32 and the length d2 of the second opening 321 is less than or equal to half of the width L1 of the second metal layer 32; in an embodiment in which the first opening 311 is arranged on the top right side of the first metal layer 31 and the length d1 of the first opening 311 is less than or equal to half of the width L1 of the first metal layer 31, the second opening 321 is arranged on the top left side of the second metal layer 32 and the length d2 of the second opening 321 is less than or equal to half of the width L1 of the first metal layer 31.

[0060] In an implementation method in which the projections of the first opening 311 and the second opening 321 on a plane parallel to the first metal layer 31 partially overlap, in an embodiment in which the first opening 311 is arranged on the top left side of the first metal layer 31 and the length d1 of the first opening 311 is greater than (1 / 2)L1 and less than L1, the second opening 321 is arranged on the top right side of the second metal layer 32 and the length d2 of the second opening 321 is greater than (1 / 2)L1 and less than L1; in an embodiment in which the first opening 311 is arranged on the top right side of the first metal layer 31 and the length d1 of the first opening 311 is greater than (1 / 2)L1 and less than L1, the second opening 321 is arranged on the top left side of the second metal layer 32 and the length d2 of the second opening 321 is greater than (1 / 2)L1 and less than L1.

[0061] The size of the first opening 311 and the second opening 321 can control the size of the complementary current on the first metal layer wall and the second metal layer wall. The projections of the first opening 311 and the second opening 321 on the plane parallel to the first metal layer 31 do not completely overlap, so that the first metal layer 31 and the second metal layer 32 near the first opening 311 and the second opening 321 form a dipole-like structure. The dipole-like structure can cut off two currents with opposite phases on the first metal layer wall and the second metal layer wall respectively, so that the first metal layer wall and the second metal layer wall have the same direction of current. The smaller the first opening 311 and the second opening 321, the more current is offset.

[0062] Continuing with FIG3 , the first antenna assembly 21 further includes a first suspension ridge 41. The first suspension ridge 41 may include a metal sheet, a non-metallic conductive sheet, or the like. The first suspension ridge 41 is disposed between the first metal layer 31 and the second metal layer 32, and is spaced apart from the first metal layer 31 and the second metal layer 32. The first suspension ridge 41 is located between the first opening 311 and the second opening 321. The first suspension ridge 41 is configured to radiate signals outward from the first antenna assembly 21. The size of the first suspension ridge 41 affects the amount of signal energy emitted from the first opening 311 and the second opening 321. For example, the larger the first suspension ridge 41, the more signal energy is emitted from the first opening 311 and the second opening 321. It is understood that the upper end of the first suspension ridge 41 exceeds the highest ends of the first opening 311 and the second opening 321, and may also exceed the highest ends of the first metal layer 31 and the second metal layer 32. The embodiment of the present application does not limit the lower end of the first suspension ridge 41 . For example, the lower end of the first suspension ridge 41 may be lower than the lowest ends of the first opening 311 and the second opening 321 .

[0063] Continuing with FIG3 , the first antenna assembly 21 further includes a first feeding structure 51, which is disposed between the first metal layer 31 and the second metal layer 32. The first feeding structure 51 is used to feed power to the first metal layer 31 and the second metal layer 32. Referring to FIG4 , the first feeding structure 51 includes a first stripline 512 and a first via 511, wherein the centerline of the first via 511 is perpendicular to the first metal layer 31. Continuing with FIG3 , the first metal layer 31, the second metal layer 32, and the first via 511 form a substrate integrated waveguide (SIW) structure, which can propagate electromagnetic waves. The first stripline 512 is a waveguide structure used to conduct electromagnetic waves. The electromagnetic waves are conducted to the SIW through the first via 511, feeding power to the first metal layer 31 and the second metal layer 32.

[0064] The first antenna assembly 21 includes a first antenna and a second antenna. The first antenna includes: a first metal layer 31, a second metal layer 32 and a first feeding structure 51. The first antenna is used to generate a first signal. The second antenna includes: a first suspended ridge 41, a first feeding structure 51, a first opening 311 and a second opening 321. The second antenna is used to generate a second signal. The first signal and the second signal have equal amplitudes and a phase difference of 90°.

[0065] It is understandable that when the SIW propagates electromagnetic waves, it generates a magnetic current in a direction perpendicular to the first metal layer 31. The first signal generated by the first antenna is the electromagnetic wave propagated by the SIW itself. The electromagnetic wave propagated by the SIW causes current to be generated on the walls of the first metal layer and the second metal layer. The first metal layer 31 and the second metal layer 32 near the first opening 311 and the second opening 321 form a dipole-like structure. The dipole-like structure can cause the walls of the first metal layer and the second metal layer to have the same current direction, and the same current direction generates the second signal. It is understandable that the smaller the first opening 311 and the second opening 321, the more current is offset and the smaller the amplitude of the second signal. In an ideal state, the length d1 of the first opening 311 and the length d2 of the second opening 321 are equal to (1 / 2) L1. However, due to the influence of multiple factors of the common aperture, the horizontal polarization and the vertical polarization cannot achieve the ideal equal amplitude. Therefore, it is necessary to slightly increase or slightly shorten the length of the first opening 311 and the second opening 321 according to the specific antenna design so that the amplitude of the first signal and the second signal are equal.

[0066] If the polarization direction of the second signal is specified as horizontal polarization (the y direction in FIG. 2 ), the polarization direction of the first signal is vertical polarization (the x direction in FIG. 2 ). Since the first antenna and the second antenna share the first feeding structure 51, the magnetic current generated by the first antenna and the current generated by the second antenna are excited in the same direction, and the current and magnetic current excited in the same direction have a 90° phase difference. Therefore, the phase difference between the first signal and the second signal is 90°. By adjusting the size of the first opening 311 and the second opening 321 and the position of the first suspension ridge 41, the amplitudes of the first signal and the second signal can be made equal, thereby achieving circular polarization.

[0067] In this configuration, the first antenna includes a first metal layer 31, a second metal layer 32 and a first feeding structure 51. The first feeding structure 51 generates a magnetic current while transmitting a first signal. The second antenna includes a first suspended ridge 41, a first opening 311 and a second opening 321. The first metal layer 31 and the second metal layer 32 near the first opening 311 and the second opening 321 form a dipole-like structure, so that there is a unidirectional current on the wall of the first metal layer and the wall of the second metal layer, and the unidirectional current generates a second signal. By adjusting the size of the first opening 311 and the second opening 321 and the position of the first suspended ridge 41, the amplitudes of the first signal and the second signal can be equal. The unidirectionally excited current and magnetic current have a 90° phase difference, so that the phase difference between the first signal and the second signal is 90°, so that the antenna assembly 20 achieves circular polarization, which simplifies the wiring, installation and production of the antenna.

[0068] 3 , in some implementations, the first antenna assembly 21 further includes a first dielectric layer 61, which is disposed between the first metal layer 31 and the second metal layer 32, and the first suspension ridge 41 is disposed within the first dielectric layer 61. It is understood that the first dielectric layer 61 may include two layers. During fabrication, the first metal layer 31 is attached to one side of one first dielectric layer 61, and the first suspension ridge 41 is attached to the other side. Another first dielectric layer 61 is attached to the other side of the first suspension ridge 41, and the second metal layer 32 is attached to the side of the other first dielectric layer 61 not attached to the first suspension ridge 41.

[0069] In this configuration, the first dielectric layer 61 can protect the first suspension ridge 41 and isolate the first suspension ridge 41 , the first metal layer 31 and the second metal layer 32 to prevent them from contacting each other, thereby improving the insulation inside the first antenna assembly 21 .

[0070] 4 , in some implementations, the first feeding structure 51 includes a first feeding loop 513. The first feeding loop 513 is disposed within the first dielectric layer 61 (as shown in FIG3 ). The first dielectric layer 61 is provided with a first via 511, and the first feeding loop 513 surrounds the periphery of the first via 511. The first feeding structure 51 can transmit electromagnetic waves transmitted from the first stripline 512 to the first via 511 through the first feeding loop 513, thereby feeding the first metal layer 31 and the second metal layer 32 through the first via 511.

[0071] It is understandable that the first feeding ring 513 can feed power to the first metal layer 31 and the second metal layer 32 through the first via 511 , or the first feeding ring 513 can be directly connected to the first metal layer 31 and the second metal layer 32 to feed power thereto.

[0072] It is understood that the first feed structure 51 comprises a stripline filter structure, and its size distribution affects the filter passband and suppression, thereby affecting the isolation between different-frequency antenna components and the matching of the antennas. For example, in an implementation in which multiple first feed structures 51 are included, when the spacing between two adjacent first feed structures 51 is 7.5 mm, the first feed structure 51 can allow K-band RF signals to pass through.

[0073] With this configuration, the first feeding structure 51 can transmit the electromagnetic waves transmitted from the first stripline 512 to the first via 511 through the first feeding loop 513, and feed the first metal layer 31 and the second metal layer 32 through the first via 511. At the same time, the first feeding structure 51 can adjust the filter passband and suppression by adjusting the size distribution, thereby affecting the isolation between different frequency antenna components and the matching of the antennas.

[0074] Continuing with reference to FIG4 , in some implementations, the first antenna assembly 21 further includes a first filter 71, which is coupled to the first feed loop 513. The first filter 71 is configured to allow only radio frequency signals of a first frequency to be transmitted to the first feed loop 513. It is understood that coupling can include a physical connection. In the embodiment of the present application, the first filter 71 and the first feed loop 513 include a direct physical connection. It is understood that the first filter 71 can include a branch bandpass filter. Referring to FIG5 , the branch bandpass filter includes a first stripline branch 711, a second stripline branch 712, and a third stripline branch 713. The first stripline branch 711, the second stripline branch 712, and the third stripline branch 713 are all symmetrical about the center line, and the spacing r1 between the first stripline branch 711 and the third stripline branch 713 is equal to the spacing r2 between the second stripline branch 712 and the third stripline branch 713. It is understood that by controlling the lengths of the first stripline branch 711, the second stripline branch 712, and the third stripline branch 713, as well as r1 and r2, the frequency band of the RF signal passing through the first filter 71 can be adjusted. For example, the length of the second stripline branch 712 is 4 mm, the lengths of the first stripline branch 711 and the third stripline branch 713 are 3.2 mm, and r1 = r2 = 0.9 mm. Therefore, the first filter 71 only allows RF signals in the K band to pass through. It is understood that the first filter 71 may also employ other filters that control the passage of specific frequency bands.

[0075] In this way, the first filter 71 is configured to only allow RF signals of the first frequency to be transmitted to the first feeding ring 513. At the same time, the first filter 71 can serve as a reflector for RF signals of other frequencies to prevent interference between RF signals of various frequencies and improve the port isolation of the first antenna assembly 21.

[0076] Referring to Figure 6 , in some implementations, there are multiple first antenna assemblies 21, each spaced apart along a direction parallel to the first metal layer 31 (the y-direction in Figure 2 ). The first metal layer 31 of each first antenna assembly 21 is disposed on the same layer, and the second metal layer 32 of each first antenna assembly 21 is disposed on the same layer. It will be appreciated that there are 32 first antenna assemblies 21, each spaced apart, with the spacing between adjacent first antenna assemblies 21 being 7.5 mm.

[0077] With such configuration, multiple first antenna components 21 can form an antenna array, thereby increasing the gain of the antenna and enhancing the directivity of the antenna.

[0078] Continuing with FIG. 2 , in some implementations, the antenna assembly 20 provided in the embodiments of the present application further includes a second antenna assembly 22. Referring to FIG. 7 , the second antenna assembly 22 includes a third metal layer 33 and a fourth metal layer 34. The projections of the third metal layer 33 and the fourth metal layer 34 on a plane parallel to the third metal layer 33 completely overlap. A third opening 331 is provided in the third metal layer 33 and is located on top of the third metal layer 33. The fourth metal layer 34 is arranged parallel to and spaced apart from the third metal layer 33. A fourth opening 341 is provided in the fourth metal layer 34 and is located on top of the fourth metal layer 34. The projections of the fourth opening 341 and the third opening 331 on a plane parallel to and perpendicular to the third metal layer 33 do not completely overlap. Both the third metal layer 33 and the fourth metal layer 34 are configured to be grounded. The third metal layer 33 faces the second metal layer 32, and the third metal layer 33 and the second metal layer 32 are arranged parallel to and spaced apart from each other.

[0079] It is understandable that the second antenna assembly 22 and the first antenna assembly 21 are spaced apart. The third opening 331 can be formed on the third metal layer 33 by etching, milling, or laser drilling. Similarly, the fourth opening 341 can be formed on the fourth metal layer 34 by etching, milling, or laser drilling. The projections of the third opening 331 and the fourth opening 341 on a plane parallel to the third metal layer 33 do not completely overlap. In other words, the projections of the third opening 331 and the fourth opening 341 on a plane parallel to the third metal layer 33 may not overlap, but may partially overlap. The specific configuration of the third opening 331 and the fourth opening 341 is similar to that of the first opening 311 and the second opening 321, and will not be further described in detail in the embodiments of the present application.

[0080] The size of the third opening 331 and the fourth opening 341 can control the size of the complementary current on the third metal layer wall and the fourth metal layer wall. The projections of the third opening 331 and the fourth opening 341 on the plane parallel to the third metal layer 33 do not completely overlap, so that the third metal layer 33 and the fourth metal layer 34 near the third opening 331 and the fourth opening 341 form a dipole-like structure. The dipole-like structure can cut off two currents with opposite phases on the third metal layer wall and the fourth metal layer wall respectively, so that the third metal layer wall and the third metal layer wall have currents in the same direction. The smaller the third opening 331 and the fourth opening 341 are, the more currents are offset.

[0081] Continuing with FIG7 , the second antenna assembly 22 further includes a second suspension ridge 42, which is a metal sheet. The second suspension ridge 42 is disposed between the third metal layer 33 and the fourth metal layer 34, spaced from both the third metal layer 33 and the fourth metal layer 34. The second suspension ridge 42 is located between the third opening 331 and the fourth opening 341. The second suspension ridge 42 is configured to reflect signals toward the third opening 331 and the fourth opening 341, so that the signals are emitted from the third opening 331 and the fourth opening 341. The size of the second suspension ridge 42 affects the amount of signal energy emitted from the third opening 331 and the fourth opening 341. For example, the larger the second suspension ridge 42, the more signal energy is emitted from the third opening 331 and the fourth opening 341. It is understood that the upper end of the second suspension ridge 42 exceeds the highest ends of the third opening 331 and the fourth opening 341, and may also exceed the highest ends of the third metal layer 33 and the fourth metal layer 34. The embodiment of the present application does not limit the lower end of the second suspension ridge 42 . For example, the lower end of the second suspension ridge 42 may be lower than the lowest ends of the third opening 331 and the fourth opening 341 .

[0082] Continuing with FIG7 , the second antenna assembly 22 further includes a second feeding structure 52 disposed between the third metal layer 33 and the fourth metal layer 34. The second feeding structure 52 is configured to feed power to the third and fourth metal layers 33, 34. The second feeding structure 52 includes a second stripline 522 and a second via 521, with the centerline of the second via 521 perpendicular to the third metal layer 33. The third and fourth metal layers 33, 34, and the second via 521 form a SIW structure, which can propagate electromagnetic waves. The second stripline 522 is a waveguide structure configured to conduct electromagnetic waves. The electromagnetic waves are transmitted to the SIW through the second via 521, feeding power to the third and fourth metal layers 33, 34.

[0083] The second antenna assembly 22 also includes a third antenna and a fourth antenna. The third antenna includes: a third metal layer 33, a fourth metal layer 34 and a second feeding structure 52. The third antenna is used to generate a third signal. The fourth antenna includes: a second suspended ridge 42, a third opening 331 and a fourth opening 341. The fourth antenna is used to generate a fourth signal. The third signal and the fourth signal have equal amplitudes and a phase difference of 90°.

[0084] It is understood that the SIW propagates electromagnetic waves and generates magnetic currents, and the third signal generated by the third antenna is the electromagnetic wave propagated by the SIW itself. The electromagnetic wave propagated by the SIW causes currents to be generated on the walls of the third and fourth metal layers. The third metal layer 33 and the fourth metal layer 34 near the third opening 331 and the fourth opening 341 form a dipole-like structure. The dipole-like structure can cause currents to flow in the same direction on the walls of the third and fourth metal layers, and the same direction currents generate the fourth signal. It is understood that the smaller the third opening 331 and the fourth opening 341, the more currents are offset and the smaller the amplitude of the fourth signal. Ideally, the length d3 of the third opening 331 and the length d4 of the fourth opening 341 are equal to (1 / 2)L2. However, due to the influence of multiple factors of the common aperture, the horizontal polarization and vertical polarization cannot achieve the ideal equal amplitude. Therefore, it is necessary to slightly increase or slightly shorten the length of the third opening 331 and the fourth opening 341 according to the specific antenna design so that the amplitudes of the third and fourth signals are equal.

[0085] If the polarization direction of the fourth signal is specified as horizontal polarization (the y direction in Figure 2), the polarization direction of the third signal is vertical polarization (the x direction in Figure 2). Because the current and magnetic current of the same excitation direction have a 90° phase difference, the phase difference between the third signal and the fourth signal is also 90°. By adjusting the size of the third opening 331 and the fourth opening 341 and the position of the second suspension ridge 42, the amplitudes of the third signal and the fourth signal can be made equal, thereby achieving circular polarization.

[0086] In this configuration, the third antenna includes a third metal layer 33, a fourth metal layer 34 and a second feeding structure 52. The second feeding structure 52 generates a magnetic current while transmitting the third signal. The fourth antenna includes a second suspended ridge 42, a third opening 331 and a fourth opening 341. The third metal layer 33 and the fourth metal layer 34 near the third opening 331 and the fourth opening 341 form a dipole-like structure, so that the walls of the third metal layer and the walls of the fourth metal layer are currents in the same direction, and the currents in the same direction generate the fourth signal. By adjusting the size of the third opening 331 and the fourth opening 341 and the position of the second suspended ridge 42, the amplitudes of the third signal and the fourth signal can be made equal. The current and magnetic current excited in the same direction have a 90° phase difference, so that the phase difference between the third signal and the fourth signal is 90°, thereby achieving circular polarization of the antenna assembly 20.

[0087] In some implementations, the first antenna assembly signal includes a first signal and a second signal, and the second antenna assembly signal includes a third signal and a fourth signal, and the first antenna assembly signal and the second antenna assembly signal have orthogonal polarizations. It is understood that the first antenna assembly signal and the second antenna assembly signal are both circularly polarized signals. In implementations where the first antenna assembly signal is left-hand circularly polarized, the second antenna assembly signal is right-hand circularly polarized; and in implementations where the first antenna assembly signal is right-hand circularly polarized, the second antenna assembly signal is left-hand circularly polarized.

[0088] With this configuration, the polarizations of the first antenna component signal and the second antenna component signal are orthogonal, which can improve the isolation between the adjacent first antenna component 21 and the second antenna component 22 .

[0089] Referring to FIG8 , in some implementations, the antenna assembly 20 provided in the embodiments of the present application further includes a metal floor 23 disposed between the second metal layer 32 and the third metal layer 33. The second metal layer 32 and the third metal layer 33 are both in contact with the metal floor 23. The metal floor 23 is spaced apart from the second opening 321 and the third opening 331. For example, the spacing a between the first antenna assembly 21 and the second antenna assembly 22 is 2.5 mm, and the thickness b of the metal floor 23 is 1 mm. Limiting holes 231 are provided at both ends of the metal floor 23 (as shown in FIG9 ). Limiting holes 231 are correspondingly provided on the first antenna assembly 21 (first metal layer 31, first dielectric layer 61, and second metal layer 32) and the second antenna assembly 22 (third metal layer 33, second dielectric layer 62, and fourth metal layer 34) in contact with the metal floor 23. Metal posts can be passed through the limiting holes 231 to secure the first antenna assembly 21, the metal floor 23, and the second antenna assembly 22. It is understandable that the embodiment of the present application does not limit the material of the metal floor 23. For example, the material of the metal floor 23 may include copper, aluminum, stainless steel, brass, and alloys thereof.

[0090] It is understood that the black arrow line in FIG8 represents the propagation direction of the electromagnetic wave, and the white arrow line represents the vertical polarization direction of the electromagnetic wave. The metal floor 23 is located between the first antenna component 21 and the second antenna component 22. The outer wall of the second metal layer 32, the outer wall of the third metal layer 33, and the long groove formed by the upper end space of the metal floor 23 are the planar waveguide 24 (Parallel Plate Planar waveguide 24 is a planar waveguide (PPW) with a first suspension ridge 41 separating the first antenna assembly signal and radiating the first antenna assembly signal outward from the first antenna assembly 21. The second suspension ridge 42 separates the second antenna assembly signal and radiates the second antenna assembly signal outward from the second antenna assembly 22. The radiated first antenna assembly signal and the second antenna assembly signal will squeeze into the planar waveguide 24 and propagate along the axis of the planar waveguide 24. Since the propagation direction of the electromagnetic wave is perpendicular to the polarization direction, the polarization direction of the electromagnetic wave radiated by the planar waveguide 24 is the same as the polarization direction of the first signal and the third signal. Therefore, the planar waveguide 24 can transmit the first signal and the third signal to the metal floor 23 and reflect the first signal and the third signal. The second signal and the fourth signal are absorbed by the planar waveguide 24. Therefore, the planar waveguide 24 affects the amplitude of the vertically polarized components of the first antenna assembly signal and the second antenna assembly signal, and affects the amplitude difference between the horizontal polarization and the vertical polarization of the first antenna assembly signal and the second antenna assembly signal, thereby causing the axial ratio of the electromagnetic field ultimately radiated by the antenna assembly 20 to change. It can be understood that the lower end of the planar waveguide 24 is the metal floor 23 , and the metal floor 23 can reflect electromagnetic waves, thereby increasing the amplitude of the vertical polarization signal of the antenna assembly 20 .

[0091] It is understandable that the position and size of the first suspension ridge 41 and the second suspension ridge 42 will affect the amount of signal radiated into the planar waveguide 24 . For example, the larger the first suspension ridge 41 and the second suspension ridge 42 are, the more signal radiated into the planar waveguide 24 .

[0092] With this configuration, the metal floor 23 contacts the second metal layer 32 and the third metal layer 33, grounding the second and third metal layers 32, 33. The provision of limiting holes 231 in the metal floor 23 reinforces the connection between the first antenna assembly 21, the metal floor 23, and the second antenna assembly 22, ensuring close contact. Furthermore, the antenna assembly 20 utilizes the metal floor 23 to increase the amplitude of the vertical polarization of the first and second antenna assemblies 21, 22, ensuring that the horizontal and vertical polarization amplitudes of the antenna assembly 20 are equal, thereby improving the circular polarization purity.

[0093] Referring to FIG. 10 , in some implementations, there are multiple second antenna assemblies 22 , and the multiple second antenna assemblies 22 are spaced apart along a direction parallel to the first metal layer 31 (the y direction in FIG. 2 ). The third metal layers 33 of the second antenna assemblies 22 are arranged on the same layer, and the fourth metal layers 34 of the second antenna assemblies 22 are arranged on the same layer.

[0094] With such configuration, multiple second antenna assemblies 22 can form an antenna array, thereby increasing the gain of the antenna and enhancing the directivity of the antenna.

[0095] Referring to Figure 11 , in some implementations, there are multiple first antenna assemblies 21 and multiple second antenna assemblies 22. For example, there are 32 first antenna assemblies 21 and 32 second antenna assemblies 22. Multiple first antenna assemblies 21 and multiple second antenna assemblies 22 are alternately arranged along a direction perpendicular to the first metal layer 31 (the x-direction in Figure 11 ). It should be understood that a metal floor 23 is provided between each of the first antenna assemblies 21 and the second antenna assemblies 22.

[0096] In this arrangement, multiple first antenna assemblies 21 and multiple second antenna assemblies 22 are alternately arranged to form an antenna array, which can improve antenna gain and enhance antenna directivity. Furthermore, the metal floor 23 can be used to reflect vertically polarized signals and absorb horizontally polarized signals entering the planar waveguide 24 (as shown in Figure 8), thereby compensating for the vertically polarized signals.

[0097] 7 , in some implementations, the second antenna assembly 22 further includes a second dielectric layer 62, which is disposed between the third metal layer 33 and the fourth metal layer 34, and the second suspension ridge 42 is disposed within the second dielectric layer 62. It will be appreciated that the second dielectric layer 62 may include two layers. During fabrication, the third metal layer 33 is attached to one side of one second dielectric layer 62, and the second suspension ridge 42 is attached to the other side. Another second dielectric layer 62 is attached to the other side of the second suspension ridge 42, and the fourth metal layer 34 is attached to the side of the other second dielectric layer 62 not attached to the second suspension ridge 42.

[0098] In this configuration, the second dielectric layer 62 can protect the second suspension ridge 42 and isolate the second suspension ridge 42 , the third metal layer 33 and the fourth metal layer 34 to prevent them from contacting each other, thereby improving the insulation inside the second antenna assembly 22 .

[0099] Referring to FIG. 12 , in some implementations, the second feeding structure 52 includes a second feeding ring 523. The second feeding ring 523 is disposed within the second dielectric layer 62 (as shown in FIG. 7 ). The second dielectric layer 62 is provided with a second via 521. The second feeding ring 523 surrounds the outer circumference of the second via 521. It is understood that the second feeding ring 523 can feed power to the third metal layer 33 and the fourth metal layer 34 through the second via 521. The second feeding ring 523 can also be directly connected to the third metal layer 33 and the fourth metal layer 34 to feed power thereto.

[0100] It is understood that the second feed structure 52 comprises a stripline filter structure, and its size distribution affects the filter passband and suppression, thereby affecting the isolation between different-frequency antenna components and the antenna matching. For example, in an implementation in which multiple second feed structures 52 are included, when the spacing between adjacent second feed structures 52 is 5 mm, the second feed structure 52 can allow Ka-band RF signals to pass.

[0101] With this configuration, the second feeding structure 52 can transmit the electromagnetic waves transmitted from the second stripline 522 to the second via 521 through the second feeding loop 523, and feed the third metal layer 33 and the fourth metal layer 34 through the second via 521. At the same time, the second feeding structure 52 can adjust the filter passband and suppression by adjusting the size distribution, thereby affecting the isolation between different frequency antenna components and the matching of the antennas.

[0102] Continuing with reference to FIG7 , in some implementations, the second antenna assembly 22 further includes a second filter 72, the second filter 72 being coupled to the second feed loop 523, and the second filter 72 being configured to allow only radio frequency signals of the second frequency to be transmitted to the second feed loop 523. It is understood that the coupling may include a physical connection, and in the embodiment of the present application, the second filter 72 and the second feed loop 523 include a direct physical connection. It is understood that the second filter 72 may include a stripline filtering structure of the second feed structure 52, and may also include other filters that control the passage of specific frequency bands. The embodiment of the present application does not limit the selection of the second filter 72. For example, a branch bandpass filter may be used.

[0103] In this way, the second filter 72 is configured to only allow RF signals of the second frequency to be transmitted to the second feed ring 523. At the same time, the second filter 72 can serve as a reflector for RF signals of other frequencies to prevent interference between RF signals of various frequencies and improve the port isolation of the second antenna component 22.

[0104] The above description is merely a specific embodiment of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art 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, characterized in that: include: A first antenna assembly, the first antenna assembly comprising: a first metal layer, wherein a first opening is provided on the first metal layer; a second metal layer, the second metal layer being arranged parallel to and spaced apart from the first metal layer, the second metal layer being provided with a second opening, and the first metal layer and the second metal layer being configured to be grounded; a first suspension ridge, the first suspension ridge being disposed between the first metal layer and the second metal layer, the first suspension ridge being spaced apart from both the first metal layer and the second metal layer, and the first suspension ridge being located between the first opening and the second opening; The first suspended ridge is configured to reflect a signal toward the first opening and the second opening so that the signal is emitted from the first opening and the second opening; a first feeding structure, the first feeding structure being disposed between the first metal layer and the second metal layer, and being configured to feed power to the first metal layer and the second metal layer; The first antenna assembly includes a first antenna and a second antenna, the first antenna including: the first metal layer, the second metal layer, and the first feeding structure, the first antenna is used to generate a first signal; the second antenna includes: the first suspended ridge, the first opening, and the second opening, the second antenna is used to generate a second signal, the first signal and the second signal have equal amplitudes and a phase difference of 90°.

2. The antenna assembly according to claim 1, wherein: The first antenna assembly further includes a first dielectric layer, the first dielectric layer is disposed between the first metal layer and the second metal layer, and the first suspended ridge is disposed within the first dielectric layer.

3. The antenna assembly according to claim 2, wherein: The first feeding structure includes a first feeding ring, which is arranged in the first dielectric layer. A first via is provided on the first dielectric layer. The center line of the first via is perpendicular to the first metal layer. The first feeding ring surrounds the outer circumference of the first via.

4. The antenna assembly according to claim 3, wherein: The first antenna assembly further includes a first filter coupled to the first feed loop, wherein the first filter is configured to allow only radio frequency signals of a first frequency to be transmitted to the first feed loop.

5. The antenna assembly according to any one of claims 1 to 4, characterized in that: There are multiple first antenna components, and the multiple first antenna components are arranged at intervals along a direction parallel to the first metal layer. The first metal layers of each first antenna component are arranged on the same layer, and the second metal layers of each first antenna component are arranged on the same layer.

6. The antenna assembly according to any one of claims 1 to 5, characterized in that: The antenna assembly further includes a second antenna assembly, the second antenna assembly including: a third metal layer, wherein a third opening is provided on the third metal layer; a fourth metal layer, the fourth metal layer being arranged parallel to and spaced apart from the third metal layer, the fourth metal layer being provided with a fourth opening, and the third metal layer and the fourth metal layer being configured to be grounded; a second suspension ridge, the second suspension ridge being disposed between the third metal layer and the fourth metal layer, the second suspension ridge being spaced apart from both the third metal layer and the fourth metal layer, and the second suspension ridge being located between the third opening and the fourth opening; The second suspended ridge is configured to reflect the signal toward the third opening and the fourth opening so that the signal is emitted from the third opening and the fourth opening; a second feeding structure, the second feeding structure being arranged between the third metal layer and the fourth metal layer, and the second feeding structure being used to feed power to the third metal layer and the fourth metal layer; The second antenna assembly includes a third antenna and a fourth antenna, the third antenna including: a third metal layer, a fourth metal layer, and a second feed structure, the third antenna being configured to generate a third signal; the fourth antenna including: a second suspended ridge, a third opening, and a fourth opening, the fourth antenna being configured to generate a fourth signal, the third signal and the fourth signal having equal amplitudes and a 90° phase difference; The second metal layer is arranged facing the third metal layer, and the second metal layer and the third metal layer are arranged in parallel and spaced apart.

7. The antenna assembly according to claim 6, wherein: The antenna assembly further includes a metal floor, the metal floor being disposed between the second metal layer and the third metal layer, the second metal layer and the third metal layer both being in contact with the metal floor; The metal floor is spaced apart from the second opening and the third opening.

8. The antenna assembly according to claim 6 or 7, characterized in that: There are multiple second antenna components, and the multiple second antenna components are arranged at intervals along a direction parallel to the third metal layer. The third metal layer of each second antenna component is arranged on the same layer, and the fourth metal layer of each second antenna component is arranged on the same layer.

9. The antenna assembly according to any one of claims 6 to 8, characterized in that: There are multiple first antenna components and multiple second antenna components, and the multiple first antenna components and the multiple second antenna components are alternately arranged along a direction perpendicular to the first metal layer.

10. The antenna assembly according to any one of claims 6 to 9, characterized in that: The second antenna assembly further includes a second dielectric layer, the second dielectric layer is disposed between the third metal layer and the fourth metal layer, and the second suspended ridge is disposed within the second dielectric layer.

11. The antenna assembly according to any one of claims 6 to 10, characterized in that: The second feeding structure includes a second feeding ring, which is arranged in the second dielectric layer. A second via is provided on the second dielectric layer. The center line of the second via is perpendicular to the third metal layer. The second feeding ring surrounds the outer circumference of the second via.

12. The antenna assembly according to any one of claims 6 to 11, characterized in that: The second antenna assembly further includes a second filter coupled to the second feed loop, wherein the second filter is configured to allow only radio frequency signals of a second frequency to be transmitted to the second feed loop.

13. The antenna assembly according to any one of claims 6 to 12, characterized in that: The first antenna component signal includes the first signal and the second signal, the second antenna component signal includes the third signal and the fourth signal, the first antenna component signal includes left-hand circular polarization and the second antenna component signal includes right-hand circular polarization or the first antenna component signal includes right-hand circular polarization and the second antenna component signal includes left-hand circular polarization.

14. A communication device, characterized in that: It comprises a housing and the antenna assembly according to any one of claims 1 to 13, wherein the housing encloses a mounting cavity, and the antenna assembly is arranged in the mounting cavity.

Images