Dual polarized antenna and communication device

Abstract

The application provides a dual-polarized antenna and a communication device. A radiator of the dual-polarized antenna has a central position and comprises a plurality of radiation structures. A first end of any one of the radiation structures is connected to a second end of an adjacent radiation structure, so that the plurality of radiation structures are sequentially connected end to end to form a closed loop. An electrical length of the closed loop is N times a wavelength corresponding to a first resonant frequency, where N is greater than or equal to 1.5 and less than or equal to 2.5. The radiator is provided with a first feed point, a second feed point, a first ground point and a second ground point. The first feed point is used to receive a radio frequency signal and excite the radiator to form a first polarized antenna. The second feed point is used to receive a radio frequency signal and excite the radiator to form a second polarized antenna. The radiator of the dual-polarized antenna has the advantage of small size.

Description

Technical Field

[0001] This application relates to the field of radio frequency antenna technology, and more particularly to a dual-polarized antenna and communication device. Background Technology

[0002] The development trend of communication equipment is towards miniaturization to improve customer experience. With the continuous upgrades of Wi-Fi 7 AP products, the size of communication equipment is getting smaller, but the number of streams is increasing exponentially, posing challenges to antenna system design. Dual-polarized antennas typically use two identical radiating elements arranged at a 90° angle to achieve two polarizations. However, to improve the isolation between the two polarizations, the radiating elements need to be spaced at a certain distance during their cross-arrangement. This approach results in a larger area occupied by the radiating elements, making it difficult to miniaturize the antenna. Utility Model Content

[0003] This application provides a dual-polarized antenna and a communication device, wherein the radiator of the dual-polarized antenna has the advantage of small size.

[0004] In a first aspect, this application provides a dual-polarized antenna, comprising a radiator capable of generating a first resonance, the radiator having a central position and including radiating structures, the radiating structures being a plurality of such structures arranged sequentially around the central position along a circumferential direction, each radiating structure including a first end and a second end, the first end and the second end being located at the end of the radiating structure facing the central position and spaced apart, the first end of any radiating structure being connected to the second end of an adjacent radiating structure to form a connecting end, the radiating structures being sequentially connected end-to-end to form a closed loop, the electrical length of the closed loop being N times the wavelength corresponding to the resonant frequency of the first resonance, where N is greater than or equal to 1.5 and less than or equal to 2.5; the number of connecting ends... The device comprises multiple connection ends, including a first connection end, a second connection end, a third connection end, and a fourth connection end. The first connection end includes a first feed point, the second connection end includes a second feed point, the third connection end includes a first ground point, and the fourth connection end includes a second ground point. The first feed point and the first ground point are arranged opposite each other along a first direction, and the second feed point and the second ground point are arranged opposite each other along a second direction. The first direction and the second direction intersect. The first feed point is used to receive radio frequency signals and excite the radiator to form a first polarized antenna. The second feed point is used to receive radio frequency signals and excite the radiator to form a second polarized antenna. The polarization direction of the first polarized antenna is the first direction, and the polarization direction of the second polarized antenna is the second direction.

[0005] The radiator provided in this application employs a folded dipole antenna structure to form a closed loop connected end to end. By bending the extension path of the radiator, the current path is extended, reducing the overall area occupied by the radiator and facilitating miniaturization. Specifically, from the center of the radiator to its outer edge away from the center, the radiator includes both radially extending branches and circumferentially extending branches. These radially and circumferentially extending branches together form a closed loop. From the center to the edge, all branches participate in the first resonance. Therefore, the winding extension path length of the radiator can achieve the required electrical length of N times the wavelength corresponding to the resonant frequency of the first resonance (N is greater than or equal to 1.5 and less than or equal to 2.5) within a relatively small area, which is beneficial for achieving a small-area design of the radiator. In the dual-polarized antenna provided in this application, the radiators of the first and second polarized antennas are integrated into a single radiating structure. That is, the radiating structure can excite both polarized antennas without separating the two polarized radiators. Therefore, this application facilitates miniaturization of the radiator.

[0006] In one possible implementation, the radiating structure includes a first segment, a connecting segment, and a second segment connected sequentially. The first end is the end of the first segment facing the center position, and the second end is the end of the second segment facing the center position. Both the first and second segments are non-linear. This solution designs the first and second segments as non-linear, ensuring that both segments have extended areas in both the first and second directions, thus preventing current cancellation between the first and second segments. If both segments were linear, the currents would cancel each other out when the branches of the two linear segments extend parallel to each other. This solution, through the design of the non-linear first and second segments, ensures that both segments participate in the radiation of the radio frequency signal in the first resonant state.

[0007] In one possible implementation, the first segment is interconnected with the second segment of the adjacent radiating structure to form an inner ring branch. The number of inner ring branches is the same as the number of radiating structures and they are arranged sequentially around the central position in a circumferential direction. A straight gap is formed between two adjacent inner ring branches. This solution, by constraining the inner ring branches to be arranged circumferentially around the central position and forming a straight gap between adjacent inner ring branches, is beneficial for miniaturizing the overall size of the radiator.

[0008] In one possible implementation, the first segment is interconnected with the second segment of the adjacent radial structure to form an inner ring branch, the inner ring branch being C-shaped. This solution provides a specific morphology of the inner ring branch.

[0009] In one possible implementation, both the number of radiators and the number of inner ring branches are four, and the gaps between the four inner ring branches form a cross-shaped gap structure. This solution provides a specific radiator shape by constraining the number of inner ring branches and forming a cross-shaped gap structure. The symmetrically arranged inner ring branches in a cross shape make it easier to adjust the impedance and bandwidth of the radiator.

[0010] In one possible implementation, two of the four inner ring stubs are arranged along a first direction, and the other two are arranged along a second direction. When the radiator is excited to generate a first resonance and forms the first polarized antenna, the current distribution of the two inner ring stubs arranged along the first direction is in the same direction. When the radiator is excited to generate a first resonance and forms the second polarized antenna, the current distribution of the two inner ring stubs arranged along the second direction is in the same direction. This scheme constrains the arrangement and current distribution of the four inner ring stubs. In the first resonance state of the radiator, all inner ring stubs can participate in the radiation of the first and second polarized antennas. This scheme enables the inner ring stubs to strongly participate in the radiation of the radiator's first resonance.

[0011] In one possible implementation, the inner ring branch is a patch structure with a slit and a through hole. The slit connects the through hole and the edge of the inner ring branch, and forms an opening at the edge of the inner ring branch. The opening separates the connecting segments of adjacent radial structures. This solution provides a specific structural form of the inner ring branch.

[0012] In one possible implementation, the electrical length of each of the radiating structures is half the wavelength corresponding to the resonant frequency of the first resonance.

[0013] In one possible implementation, each of the connecting segments includes a top end located at the midpoint of the connecting segment and at the outer edge of the radiator away from the center, and the electrical length between the top end and the first end is one-quarter of the wavelength corresponding to the resonant frequency of the first resonance.

[0014] In one possible implementation, the connecting segment includes any one or a combination of arc-shaped, L-shaped, straight, wavy, and W-shaped shapes.

[0015] In one possible implementation, each connecting segment includes a third segment and a fourth segment, with the first segment, the third segment, the fourth segment, and the second segment connected sequentially. The connection point between the third segment and the fourth segment is the top of the outer edge of the connecting segment away from the center. This solution provides a specific shape for the connecting segment by constraining the connection point between the third and fourth segments to be the top of the outer edge of the connecting segment away from the center. By adjusting some parameters of the connecting segment, the impedance and electrical length of the radiator can be adjusted to obtain a specific structural shape of the radiator that meets the application requirements.

[0016] In one possible implementation, the number of radiating structures is four and they are evenly distributed around the central position, and the connection between the third segment and the fourth segment is the zero point of the current of the radiator in the first resonant state.

[0017] In one possible implementation, the radiator can be excited to generate a second resonance, and the electrical lengths of the third and fourth segments are both one-quarter of the wavelength corresponding to the resonant frequency of the second resonance. The dual-polarized antenna provided in this application is a dual-band dual-polarized antenna, and the antenna's operating frequency includes a first resonance and a second resonance. In one embodiment, the first resonance is a low-frequency antenna, for example, the range of the first resonance includes a 2GHz frequency band, and the second resonance is a high-frequency antenna, for example, the range of the second resonance includes a 5GHz frequency band. In one embodiment, the resonant frequency of the first resonance is between 2.4GHz and 2.5GHz, and the resonant frequency of the second resonance is between 5.15GHz and 5.85GHz.

[0018] In one possible implementation, the radiator can be excited to generate a second resonance, and the electrical length of the closed loop is M times the wavelength corresponding to the resonant frequency of the second resonance, where M is greater than or equal to 3 and less than or equal to 5.

[0019] In one possible implementation, the resonant frequency of the first resonance is between 2.4 GHz and 2.5 GHz; or, the resonant frequency of the second resonance is between 5.15 GHz and 5.85 GHz.

[0020] In one possible implementation, the radiator can be excited to generate a second resonance, wherein the electrical length of the first segment is one-quarter of the wavelength corresponding to the resonant frequency of the second resonance; or, the electrical length of the second segment is one-quarter of the wavelength corresponding to the resonant frequency of the second resonance.

[0021] In one possible implementation, the electrical length of the connecting segment is half the wavelength corresponding to the resonant frequency of the second resonance.

[0022] In one possible implementation, the radiator can be excited to generate multiple resonant modes, including a second resonance and a third resonance. The resonant frequency of the second resonance is higher than that of the first resonance, and the resonant frequency of the third resonance is higher than that of the second resonance. The radiator provided by this solution can be excited to generate the second and third resonances, which can be used to form a broadband antenna, extending the frequency range covered by the antenna.

[0023] In one possible implementation, the dual-polarized antenna excites the radiator to generate the second and third resonances within the 5150MHz-7150MHz frequency band. This solution provides specific coverage ranges for the second and third resonances; for example, the second resonance can be a double mode of the first resonance, and the third resonance can be a triple mode of the first resonance. The dual-polarized antenna provided by this solution can utilize the second and third resonances excited by the radiator, enabling the antenna to generate a wider bandwidth at high frequencies.

[0024] In one possible implementation, the second resonance and the third resonance are higher-order resonance modes of the radiator, the first resonance is the fundamental mode resonance mode of the radiator, and the higher-order resonance modes and the fundamental mode resonance modes are approximately harmonic in relationship.

[0025] In one possible implementation, the dual-polarized antenna further includes a top plate, a bottom plate, and a vertical plate assembly. The top plate and the bottom plate are disposed opposite each other, and the vertical plate assembly is connected between the top plate and the bottom plate. The radiator is located on the top plate. The vertical plate assembly and the bottom plate are used to house a first feed assembly and a second feed assembly. The first feed assembly is used to transmit radio frequency signals to a first feed point, and the first feed assembly is used to transmit radio frequency signals to the second feed point. The bottom plate has a grounding layer, and the first grounding point and the second grounding point are electrically connected to the grounding layer through a grounding structure on the vertical plate assembly. This application places the radiator on the top plate and connects it between the bottom plate and the top plate via the vertical plate assembly to form a plate assembly structure. The plate assembly structure can be understood as a modular support structure for mounting the antenna. The vertical plate assembly and the bottom plate are used to mount the antenna's feed assembly and grounding structure. Fixing the modular support structure in the communication equipment has the advantages of structural stability and convenient assembly. A structurally stable antenna also helps to ensure stable radiation performance.

[0026] In one possible implementation, the connection between the first end of any of the radiating structures and the second end of the adjacent radiating structures is an integral wire structure disposed on the top plate. The radiator provided by this solution forms a closed loop with its ends connected by an integral wire structure disposed on the top plate. This structure is simple, requires no additional connecting structures, and helps ensure the radiation efficiency of the radiator.

[0027] In one possible implementation, the first end of any one of the radiating structures and the second end of an adjacent radiating structure are two discontinuous wire segments disposed on the top plate. An electrical connection between the first and second ends is achieved through an electrical connection structure on the top plate. This solution provides a method of setting four discontinuous radiating structures on the top plate and then connecting all the radiating structures into a closed loop. Although this structure is complex, the electrical connection structure can be positioned as a matching device or an inductor. This allows for adjustment of the electrical length of the radiator. Even if the electrical length of all the radiating structures does not meet the requirements, an inductor can be placed at the electrical connection structure position to extend its electrical length, which is beneficial for the design of small-sized radiators.

[0028] In one possible implementation, the upright plate assembly includes a first upright plate and a second upright plate, which intersect and are both connected between the top plate and the bottom plate; the first power supply assembly includes a first power supply port and a first power supply structure, the first power supply port being disposed on the bottom plate and the first power supply structure being disposed on the first upright plate, the first upright plate also having a first grounding structure, the first grounding structure being connected between the grounding layer and the first grounding point of the radiator, and the first power supply structure being electrically connected between the first power supply point and the first power supply port; the second power supply assembly includes a second power supply port and a second power supply structure, the second power supply port being disposed on the bottom plate and the second power supply structure being disposed on the second upright plate, the second upright plate also having a second grounding structure, the second grounding structure being connected between the grounding layer and the second grounding point of the radiator, and the second power supply structure being electrically connected between the second power supply point and the second power supply port. This solution utilizes the intersecting first and second vertical plates to achieve a stable physical connection between the top and bottom plates. It also serves as the feed structure and grounding structure for the first and second polarized antennas, respectively. This dual-function integration into one structure helps ensure the structural stability and reliable electrical connection of the dual-polarized antenna.

[0029] In one possible implementation, the first power supply component further includes a first power divider circuit, which is disposed on the base plate and electrically connected between the first power supply port and the first power supply structure. The second power supply component further includes a second power divider circuit, which is disposed on the base plate and electrically connected between the second power supply port and the second power supply structure. The number of radiators is at least two. The first power divider circuit is used to distribute the signal from the first power supply port to the first power supply point of each radiator, and the second power divider circuit is used to distribute the signal from the second power supply port to the second power supply point of each radiator. This solution, by setting power divider circuits, allows for the simultaneous placement of multiple radiators, which is beneficial for the design of multiple radiators with small dimensions.

[0030] In one possible implementation, the first feeding structure is a transmission line structure mounted on the first upright plate. The first feeding structure includes a first coupling section, and a capacitor is formed between the first coupling section and the portion of the radiator where the first feeding point is located. Alternatively, the second feeding structure is a transmission line structure mounted on the second upright plate. The second feeding structure includes a second coupling section, and a capacitor is formed between the second coupling section and the portion of the radiator where the second feeding point is located. This solution provides a specific method for coupled feeding, which eliminates the need for a connection between the radiator and the RF cable. Instead, RF signal coupling is achieved through a transmission line structure on the upright plate assembly, which helps reduce the number of cables within the communication equipment, saves space, and promotes neatness of the wiring within the communication equipment.

[0031] In one possible implementation, the first upright plate includes a first insertion portion, and the second upright plate includes a second insertion portion. The first and second insertion portions are used to insert into the insertion holes of the top plate. The insertion holes of the top plate penetrate the first radial structure. The first grounding structure is a grounding layer structure disposed on the first upright plate, extending to the first insertion portion and contacting the first grounding point. The second grounding structure is a grounding layer structure disposed on the second upright plate, extending to the second insertion portion and contacting the second grounding point. This solution, through the cooperation of the first and second insertion portions and the insertion holes on the top plate, not only physically connects the top plate and upright plate assembly but also achieves an electrical grounding connection, which is beneficial to the stability of the connection and the reliability of the grounding.

[0032] In one possible implementation, the first grounding structure and the first power supply structure are respectively disposed on the front and back sides of the first upright plate, or the second grounding structure and the second power supply structure are respectively disposed on the front and back sides of the second upright plate.

[0033] Secondly, this application provides a dual-polarized antenna, which includes a radiator capable of being excited to generate a second resonance and a third resonance. The radiator has a central position and includes multiple radiating structures arranged sequentially around the central position in a circumferential direction. Each radiating structure includes a first end and a second end, and the first end and the second end are both located at the end of the radiating structure facing the central position and are spaced apart. The first end of any radiating structure is connected to the second end of an adjacent radiating structure, so that the multiple radiating structures are connected end to end to form a closed loop. The electrical length of the closed loop is M times the wavelength corresponding to the resonant frequency of the second resonance, where M is greater than or equal to 3 and less than or equal to 5. The electrical length of the closed loop is T times the wavelength corresponding to the resonant frequency of the third resonance, where T is greater than or equal to 5 and less than or equal to 7. The radiator includes a first feed point, a second feed point, a first ground point, and a second ground point, all located at the connection points between adjacent radiating structures. The line connecting the first feed point and the first ground point extends along a first direction, and the line connecting the second feed point and the second ground point extends along a second direction. The first direction and the second direction intersect. The first feed point is used to receive radio frequency signals and excite the radiator to form a first polarized antenna. The second feed point is used to receive radio frequency signals and excite the radiator to form a second polarized antenna. The polarization direction of the first polarized antenna is the first direction, and the direction of the second polarized antenna is the second direction.

[0034] The radiator provided in this application employs a folded dipole antenna structure to form a closed loop connected end to end. By bending the extension path of the radiator, the current path is lengthened, reducing the overall area occupied by the radiator and facilitating miniaturization. Specifically, from the center of the radiator to its outer edge away from the center, the radiator includes both radially extending branches and circumferentially extending branches, which together form a closed loop. By exciting the closed loop-shaped radiator to generate a second and third resonance, and constraining the relationship between the electrical length of the closed loop and the resonant frequency in these two resonance modes, the dual-polarized antenna provided in this solution can achieve a wideband resonant mode, thus expanding the bandwidth of the dual-polarized antenna.

[0035] In one possible implementation, the dual-polarized antenna excites the radiator to generate the second resonance and the third resonance in the 5150MHz-7150MHz frequency band.

[0036] Thirdly, this application provides a communication device, which includes a motherboard, an RF chip, and a dual-polarized antenna provided by any possible implementation of the first or second aspect. The RF chip is disposed on the motherboard and is used to transmit RF signals to the dual-polarized antenna. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of one direction of a communication device provided in one embodiment of this application;

[0038] Figure 2 This is a schematic diagram of another direction of the communication device provided in one embodiment of this application;

[0039] Figure 3 This is a schematic diagram of a communication device with its top cover removed, according to one embodiment of this application.

[0040] Figure 4 This is a schematic diagram of the internal plate stacking structure of the communication device provided in one embodiment of this application with the top cover and base removed.

[0041] Figure 5 This is a schematic diagram of the structure of the radiator of a dual-polarized antenna provided in one embodiment of this application;

[0042] Figure 6 This is a schematic diagram of the radiating structure of a radiator of a dual-polarized antenna provided in one embodiment of this application;

[0043] Figure 7 yes Figure 6 A schematic diagram of the inner ring branches formed by the interconnection of the first segment of the radial structure and the second segment of the adjacent radial structure.

[0044] Figure 8 yes Figure 5 The diagram shows the current direction of the radiator in the first resonant state and under the first polarization direction.

[0045] Figure 9 yes Figure 5 The diagram shows the current direction of the radiator in the first resonant state and under the second polarization direction.

[0046] Figure 10 yes Figure 5 The diagram shows the current direction of the radiator in the second resonant state and under the first polarization direction.

[0047] Figure 11 yes Figure 5 The diagram shows the current direction of the radiator in the second resonant state and under the second polarization direction.

[0048] Figure 12 This is a schematic diagram of the structure of the radiator of a dual-polarized antenna provided in one embodiment of this application;

[0049] Figure 13 This is a schematic diagram of a dual-polarized antenna radiator disposed on a top plate according to one embodiment of this application;

[0050] Figure 14A This is a schematic diagram showing a portion of the radiators of a dual-polarized antenna provided in one embodiment of this application disposed on a top plate;

[0051] Figure 14B yes Figure 14A The schematic diagram of the top plate and all radiators corresponding to the embodiment shown;

[0052] Figure 15 This is a schematic diagram of the radiator of a dual-polarized antenna provided in one embodiment of this application;

[0053] Figure 16 This is a schematic diagram of a dual-polarized antenna provided in one embodiment of this application;

[0054] Figure 17 , Figure 18 , Figure 19 and Figure 20 This is a schematic diagram of the assembly of the vertical plate assembly and the top plate in a dual-polarized antenna according to one embodiment of this application. Figure 17 , Figure 18 , Figure 19 and Figure 20 The structure of the vertical panel assembly is shown from four different angles;

[0055] Figure 21 This is a schematic diagram of the stand plate assembly in a dual-polarized antenna according to one embodiment of this application;

[0056] Figure 22 yes Figure 21 An exploded view of the vertical panel assembly in one direction;

[0057] Figure 23 yes Figure 21 An exploded view of the vertical panel assembly from another direction;

[0058] Figure 24 This is an S-parameter curve of a dual-polarized antenna provided in one embodiment of this application;

[0059] Figure 25 This is a schematic diagram of an antenna array provided in one embodiment of this application;

[0060] Figure 26 This is a schematic diagram of an antenna array provided by another design scheme;

[0061] Figures 27A-27D This is the radiation pattern of the dual-polarized antenna provided in this application.

[0062] Explanation of reference numerals in the attached figures:

[0063] 100. Communication equipment; 101. Base; 102. Top cover; 102S. Top surface; 101S. Back side; 103S. Side side; 104. Main board; 105. Top plate; 1051. Insertion hole; 106. Bottom plate; 1061. Grounding layer; 1062. Mounting hole; 107. Vertical plate assembly; 1072. Bottom end; 71. First vertical plate; 72. Second vertical plate;

[0064] 10. Radiator; 10A. Center position; 11. Radiating structure; 11D. Connecting end; 11D1. First connecting end; 11D2. Second connecting end; 11D3. Third connecting end; 11D4. Fourth connecting end; 111. First end; 112. Second end; 113. Midpoint; L1. First centerline; L2. Second centerline; L3. Third centerline; 12. First feed point; 13. Second feed point; 14. First grounding point; 15. Second grounding point; 115. First segment; 117. Connecting segment; 1171. Third segment; 1172. Fourth segment 1173, Top; 116, Second segment; 1156, Electrical connection structure; C1, First wire; C2, Second wire; 119, Inner ring branch; 118, Gap; 1191, Fragment; 1192, Through hole; 1193, Opening; 1194, Groove; 21, First feed assembly; 211, First feed port; 212, First power divider circuit; 213, First feed structure; 214, First grounding structure; 22, Second feed assembly; 221, Second feed port; 222, Second power divider circuit; 223, Second feed structure; 224, Second grounding structure. Detailed Implementation

[0065] Explanation of some terms

[0066] A wireless AP, or Access Point, is essentially a wireless switch within a wireless network. It serves as the access point for mobile users to connect to a wired network and is widely used for network coverage in various settings, including education, healthcare, and enterprise applications. Wireless APs can be used for home broadband and enterprise intranet deployments, with wireless coverage distances ranging from tens to hundreds of meters. Typical wireless APs also include an access point client mode, allowing APs to wirelessly link with each other, thereby extending the wireless network's coverage area.

[0067] Radiator (or antenna stub): This is the device in an antenna used to receive / transmit electromagnetic wave radiation. In some cases, the term "antenna" in a narrow sense refers to the radiator (or antenna stub), which converts guided wave energy from the transmitter into radio waves, or converts radio waves into guided wave energy, for radiating and receiving radio waves. The modulated high-frequency current energy (or guided wave energy) generated by the transmitter is transmitted to the transmitting radiator (or antenna stub) via a feed line, where it is converted into electromagnetic wave energy of a certain polarization and radiated in the desired direction. The receiving radiator (or antenna stub) converts electromagnetic wave energy of a certain polarization from a specific direction in space into modulated high-frequency current energy, which is then delivered to the receiver input via a feed line.

[0068] The radiator (or antenna stub) may include a conductor with a specific shape and size, such as a wire or a sheet, and this application does not limit the specific shape. In one embodiment, the linear radiator (or antenna stub) may be simply referred to as a wire antenna. In one embodiment, the linear radiator may be implemented by a conductive frame, and may also be referred to as a frame antenna. In one embodiment, the linear radiator (or antenna stub) may be implemented by a support conductor, and may also be referred to as a support antenna.

[0069] Ground / Plane: can refer to at least a portion of any grounding layer, grounding plate, or grounding metal layer in 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 / Plane" can be used for grounding components in electronic devices.

[0070] Grounding: refers to coupling with the aforementioned ground / floor via a grounding structure and / or grounding circuit. In one embodiment, grounding can be achieved through physical grounding, such as through a structural component of the mid-frame to achieve physical grounding at a specific location on the frame (or, physical ground). In another embodiment, grounding can be achieved through device grounding, such as through devices like capacitors / inductors / resistors connected in series or parallel (or, device ground).

[0071] Resonance / Resonant Frequency: The resonant frequency is also called the resonance frequency. The resonant frequency can have a frequency range, that is, the frequency range in which resonance occurs.

[0072] Resonant frequency band: The range of resonant frequencies is the resonant frequency band.

[0073] Communication band / operating band: Regardless of the type of antenna, it always operates within a certain frequency range (bandwidth). For example, an antenna supporting 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. The frequency range that meets the specifications can be considered the antenna's operating band.

[0074] The resonant frequency band and the operating frequency band may be the same or different, or their frequency ranges may partially overlap. In one embodiment, one or more resonant frequency bands of the antenna may cover one or more operating frequency bands of the antenna.

[0075] Electrical length: can be the ratio of physical length (i.e., mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave. Electrical length can satisfy the following formula:

[0076]

[0077] Where L is the physical length and λ is the wavelength of the electromagnetic wave.

[0078] Wavelength: or operating wavelength, which can be the wavelength corresponding to the center frequency of the resonant frequency or the wavelength corresponding to the center frequency of the operating frequency band supported by the antenna. "Operating wavelength" can also refer to the wavelength corresponding to the non-center frequency of the resonant frequency or operating frequency band.

[0079] It should be understood that wavelength (operating wavelength) can be understood as the wavelength of an electromagnetic wave in a medium. For example, the wavelength of an electromagnetic wave generated by a radiator propagating in a medium and the wavelength propagating in a vacuum satisfy the following formula:

[0080]

[0081] Wherein, λε is the wavelength of the electromagnetic wave in the medium, λc is the wavelength of the electromagnetic wave in vacuum, and εr is the relative permittivity of the medium in the dielectric layer. For ease of understanding, the dielectric wavelength mentioned in the embodiments of this application can be simply calculated using the relative permittivity of the medium filling one or more sides of the radiator.

[0082] Coupling: can be understood as direct coupling and / or indirect coupling. "Coupled connection" can be understood as a direct coupling connection and / or indirect coupling connection. Direct coupling can also be called "electrical connection," which can be understood as physical contact and electrical conduction between components; it can also be understood as the form of connection between different components in a circuit structure through physical lines that can transmit electrical signals, such as copper foil or wires on a printed circuit board (PCB). "Indirect coupling" can be understood as electrical conduction between two conductors through a gap / non-contact method. In one embodiment, indirect coupling can also be called capacitive coupling, for example, signal transmission is achieved by forming an equivalent capacitance through coupling between the gaps between two conductive components.

[0083] The grounding / feeding structure may include connectors, such as metal springs, and the radiator is coupled to the ground / feeding circuit via the grounding structure. In some embodiments, the feeding structure may include a transmission line / feeding wire, and the grounding structure may include a grounding wire.

[0084] A feed line, also called a transmission line, is the connection line between the antenna transceiver and the radiator. Transmission lines can transmit current waves or electromagnetic waves directly, depending on the frequency and type. The connection point on the radiator where the transmission line connects is usually called the feed point. Transmission lines include conductive transmission lines, coaxial transmission lines, waveguides, and microstrip lines. Depending on their implementation, transmission lines can include antenna supports or glass antenna bodies. Depending on the carrier, transmission lines can be made of liquid crystal polymer (LCP) materials, flexible printed circuit boards (FPCs), or printed circuit boards (PCBs).

[0085] The current unidirectional / reverse distribution mentioned in the embodiments of this application should be understood as the main currents on conductors on the same side being in the same / reverse direction. For example, when a unidirectional current is excited on a bent or looped conductor (e.g., the current path is also bent or looped), it should be understood that, for example, the main currents excited on the conductors on both sides of a looped conductor (e.g., on the conductors on both sides of a gap) are in opposite directions, but still fall under the definition of unidirectional current in this application. In one embodiment, unidirectional current on a conductor can mean that the current on that conductor has no reversal point. In one embodiment, reversible current on a conductor can mean that the current on that conductor has at least one reversal point. In one embodiment, unidirectional current on two conductors can mean that the currents on both conductors have no reversal points and flow in the same direction. In one embodiment, reversible current on two conductors can mean that the currents on both conductors have no reversal points and flow in opposite directions. The unidirectional / reverse current on multiple conductors can be understood accordingly.

[0086] The terms "middle" or "middle position" mentioned in the embodiments of this application refer to certain ranges or distances. For example, the middle (position) of a conductor can be a section of the conductor including the midpoint, or the middle (position) of a conductor can be a section of the conductor that is less than a predetermined threshold (e.g., 1 mm, 2 mm, or 2.5 mm) from the midpoint.

[0087] Antenna system efficiency (total efficiency): refers to the ratio of input power to output power at the antenna port.

[0088] Antenna radiation efficiency refers to the ratio of the power radiated into space by an antenna (i.e., the power effectively converted into electromagnetic waves) to the active power input to the antenna. Active power input to the antenna = antenna input power - loss power; loss power mainly includes return loss power and ohmic loss power of metals and / or dielectric loss power. Radiation efficiency is a measure of an antenna's radiation capability; metal loss and dielectric loss are both factors affecting radiation efficiency.

[0089] Those skilled in the art will understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between it and dB. The closer the efficiency is to 0dB, the better the efficiency of the antenna.

[0090] Antenna return loss: This can be understood as the ratio of the signal power reflected back to the antenna port after passing through the antenna circuit to the transmit power at the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the higher the antenna's radiation efficiency. Conversely, the larger the reflected signal, the smaller the signal radiated into space through the antenna, and the lower the antenna's radiation efficiency.

[0091] Antenna return loss can be represented by the S11 parameter, which is one of the S-parameters. S11 represents the reflection coefficient, and this parameter characterizes the antenna's transmission efficiency. The S11 parameter is usually negative. The smaller the S11 parameter, the smaller the antenna return loss, the less energy the antenna reflects back, which means more energy actually enters the antenna, and the higher the antenna's system efficiency. Conversely, the larger the S11 parameter, the greater the antenna return loss, and the lower the antenna's system efficiency.

[0092] Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism. It allows for situations where the parallelism is not absolute due to factors such as assembly tolerance, design tolerance, and structural flatness. It also allows for errors within a small angular range, such as within 10 degrees of assembly error. These can all be considered as parallel relationships.

[0093] Perpendicularity: The perpendicularity defined in this application is not limited to an absolute perpendicular intersection (with an included angle of 90 degrees). It is permissible for non-absolute perpendicular intersections caused by factors such as assembly tolerances, design tolerances, and structural flatness. It is permissible for errors within a small angular range, such as an assembly error range of 80 to 100 degrees, which can all be understood as a perpendicular relationship.

[0094] 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.

[0095] The possible embodiments of this application are described below with reference to the accompanying drawings.

[0096] This application provides a communication device. In one embodiment, the communication device can be a wireless AP, i.e., a wireless access point (AP). A wireless access point is a core device of a wireless local area network (WLAN), and its components may include hardware modules, software functions, and peripheral interfaces. The hardware modules may include a radio frequency (RF) module, a main control unit, a network interface, a power supply module, peripheral and expansion interfaces, and a heat dissipation structure. The RF module is responsible for transmitting and receiving wireless signals, enabling Wi-Fi communication. The RF module may include a wireless chipset, an RF front-end, and an antenna system.

[0097] Figure 1 This is a schematic diagram of one direction of a communication device provided in one embodiment of this application. Figure 2 This is a schematic diagram of another direction of the communication device provided in one embodiment of this application. (See also...) Figure 1 and Figure 2 The communication device 100 includes a base 101 and a top cover 102, which are interconnected and together constitute the outer casing of the communication device 100. The outer casing includes a top surface 102S, a back surface 101S, and a side surface 103S connecting the top surface 102S and the back surface 101S. The top surface 102S is the surface of the top cover 102 facing away from the base 101. The back surface 101S is the surface of the base 101 facing away from the top cover 102. In one embodiment, the side surface 103S is provided with an antenna interface, a power socket, a network port, a reset button, a status indicator light, etc., and the back surface 101S is provided with heat dissipation fins. In another embodiment, the base 101 is made of metal and has thermal conductivity. Heat-generating components within the communication device are close to the base 101 and can be connected to the base 101 through a thermally conductive structure and medium, allowing heat from the heat-generating components to be dissipated through the heat dissipation fins on the base 101 and the back surface 101S. In one embodiment, the top cover 102 is made of insulating material, and the radiator of the antenna inside the communication device 100 is adjacent to and faces the top surface 102S, so that radio frequency signals can be radiated from the top surface 102S to the outside.

[0098] The communication device 100 has a built-in antenna system that can radiate radio frequency signals. Specifically, the antenna system may include a dual-polarized antenna. The dual-band dual-polarized antenna is a key component of the access point (AP). By simultaneously supporting multiple frequency bands and dual polarization, it helps improve the coverage, transmission rate, and anti-interference capability of the wireless network. Through frequency band division and polarization diversity, the dual-band dual-polarized antenna solves the problems of insufficient coverage, limited capacity, and interference sensitivity of traditional APs. It is particularly suitable for high-density, multi-service concurrent modern wireless networks, and its technological advantages directly translate into improved user experience—faster speeds, more stable connections, and wider compatibility.

[0099] Figure 3 This is a schematic diagram of a communication device provided in one embodiment of this application with its top cover removed. Figure 4 This is a schematic diagram of the internal board stacking structure of the communication device provided in one embodiment of this application, with the top cover and base removed. (See attached diagram.) Figure 3 The communication device 100 has an antenna system, which includes an array of radiators 10 that can be excited to generate dual-frequency dual-polarization resonance.

[0100] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The communication device 100 includes a three-layer board structure. The bottom layer is the main board 104 of the communication device 100, which is located inside the casing of the communication device 100 near the base 101. The top layer is a top plate 105 for mounting the radiator 10, which is located inside the casing of the communication device 100 near the top cover 102. The board structure located between the main board 104 and the top plate 105 includes a base plate 106 for mounting the antenna. The base plate 106 can be equipped with a feed port, power divider circuit, etc. A stand assembly 107 can be provided between the base plate 106 and the top plate 105. A balun structure can be installed on the stand assembly 107. A balun (balanced-unbalanced) is an impedance matching and mode conversion device used to connect balanced transmission lines (such as dipole antennas) and unbalanced transmission lines (such as coaxial cables). Its core function is to solve the signal conversion problem between balanced and unbalanced systems, while suppressing common-mode noise and improving antenna efficiency.

[0101] from Figure 3As can be seen, the size of the communication device 100 affects the number of radiators 10 distributed inside it. A larger internal space in the communication device 100 allows for the distribution of more radiators 10. However, the development trend of the communication device 100 is towards miniaturization, which can improve the customer experience. With the continuous upgrading of Wi-Fi 7AP products, the size of the communication device 100 is getting smaller and smaller, but the number of streams is increasing exponentially, which poses challenges to the design of the antenna system. Therefore, how to design small-sized radiators 10 and reduce the area occupied by multiple radiators 10 in the communication device 100 is the direction of industry research and development.

[0102] This application provides an antenna system in which the radiator has a small size advantage through structural design, enabling the antenna system to achieve a higher flux number in the same area and improving the performance of the antenna system.

[0103] In one embodiment, the antenna system within the communication device includes a dual-polarized antenna. The dual-polarized antenna includes a first polarized antenna with a first polarization direction and a second polarized antenna with a second polarization direction. The first and second directions can be mutually perpendicular. For example, the first direction can be horizontal, and the second direction can be vertical.

[0104] Figure 5 This is a schematic diagram of the radiator structure of a dual-polarized antenna according to one embodiment of this application. (See also...) Figure 5 The radiator 10 can be excited to generate a first resonance. The radiator 10 is arranged around a central position 10A, which is a small area outside the radiator 10. The feed and ground positions of the radiator 10 are both adjacent to the central position 10A. The feed and ground structures of the dual-polarized antenna can be connected to the radiator 10 at the central position 10A. The feed and ground structures can be radio frequency cables, balun structures, or other structural forms.

[0105] Figure 6 This is a schematic diagram of the radiating structure of a dual-polarized antenna radiator according to one embodiment of this application. (See also...) Figure 5 and Figure 6 The radiator 10 includes multiple radiating structures 11, which are arranged sequentially around the central position 10A in a circumferential direction. Each radiating structure 11 includes a first end 111 and a second end 112, and the first end 111 and the second end 112 are located at the ends of the radiating structure 11 facing the central position 10A and are spaced apart. The first end 111 of any radiating structure 11 is connected to the second end 112 of the adjacent radiating structure 11, so that the multiple radiating structures 11 are connected end to end to form a closed loop. The position where the first end 111 and the second end 112 are connected constitutes the connection end 11D. Figure 5 The portion circled by the dashed line schematically represents the connection end 11D. Connection end 11D is used to set the first feed point 12, the second feed point 13, the first ground point 14, and the second ground point 15 (the specific correspondence between connection end 11D, the feed points, and the ground points is detailed below). The electrical length of the closed loop is N times the wavelength corresponding to the resonant frequency of the first resonance, where N is greater than or equal to 1.5 and less than or equal to 2.5. In one embodiment, the electrical length of the closed loop is twice the wavelength corresponding to the resonant frequency of the first resonance.

[0106] The electric length of the closed ring is the sum of the electric lengths of the multiple radiating structures 11, such as... Figure 6 As shown, the electrical length of each radiating structure 11 is the distance from the first end along the extension path of the radiating structure to the second end, schematically. Figure 6 The dimension of the double-dotted line extension can be understood as the distance of the electrical length extension of the radial structure 11.

[0107] The radiator 10 provided in this application adopts a folded dipole antenna structure to form a closed loop connected end to end. By bending the extension path of the radiator 10, the current path is extended, and the overall area occupied by the radiator 10 can be reduced, which is beneficial to the miniaturization design of the radiator 10. Specifically, from the center position 10A at the center of the radiator 10 to the outer edge of the radiator away from the center position, the radiator 10 includes radially extending branches and circumferentially extending branches. The radial and circumferential extending branches together form a closed loop. From the center position 10A to the edge position, all branches participate in the first resonance. Therefore, the winding extension path length of the radiator 10 can meet the requirement of an electrical length of N times (N is greater than or equal to 1.5 and less than or equal to 2.5) of the wavelength corresponding to the resonant frequency of the first resonance in a smaller area area, which is beneficial to realizing the small area design of the radiator 10.

[0108] In other embodiments, some branches of the antenna element serve as radiators, typically distributed in the peripheral region far from the center of the element. A transmission line is located near the center, transmitting signals. The transmission line essentially does not participate in radiation. Connected to the radiator, it transmits the feed signal. The transmission line usually has parallel lines with opposite and canceling current directions, preventing it from participating in radio frequency signal radiation. Therefore, in other embodiments, the radiator needs to meet electrical length requirements, necessitating a sufficiently large area. Compared to the radiator provided in this embodiment, in other embodiments, the radiator can only extend around the transmission line. The radiator provided in this application, however, is not connected to the transmission line; all branches of the radiator participate in radiation from the center to the outer edge. Therefore, the radiator provided in this application has the advantage of a smaller area.

[0109] See Figure 5 and Figure 6 In one embodiment, the stubs between the first end 111 and the midpoint 113 of the radiating structure 11 are the radial stubs of the radiator. The midpoint 113 of the radiating structure 11 forms the four corner positions of the radiator 10. The electrical length of the radial stubs is approximately 0.25 times the wavelength corresponding to the resonant frequency of the first resonance. The radiator includes eight radial stubs. In one embodiment, the eight radial stubs have the same structural shape, and adjacent radial stubs are arranged in a mirror-symmetric manner. In another embodiment, the radiator 10 has four radiating structures 11. These four radiating structures 11 can have the same shape and are rotationally symmetric about the center point 10A. The electrical length of each radiating structure 11 is half the wavelength corresponding to the resonant frequency of the first resonance. Each radiating structure 11 includes two radial stubs.

[0110] like Figure 5 As shown, the radiators 10 are symmetrically distributed along the second direction with the first center line L1 as the center of symmetry, and the radiators 10 are symmetrically distributed along the first direction with the second center line L2 as the center of symmetry. The first center line L1 extends along the first direction, and the second center line L2 extends along the second direction. The intersection of the first center line L1 and the second center line L2 is located at the center point of the center position 10A. Four radiating structures 11 are respectively arranged in the four quadrant regions between the first center line L1 and the second center line L2.

[0111] See Figure 5 In one embodiment, a first feed point 12, a second feed point 13, a first ground point 14, and a second ground point 15 are arranged sequentially in a circumferential direction surrounding the center position 10A. The number of connection ends 11D is multiple and includes a first connection end 11D1, a second connection end 11D2, a third connection end 11D3, and a fourth connection end 11D4. The first connection end 11D1 includes the first feed point 12, the second connection end 11D2 includes the second feed point 13, the third connection end 11D3 includes the first ground point 14, and the fourth connection end 11D4 includes the second ground point 15. The first feed point 12 and the first ground point 14 are arranged opposite each other along a first direction, and the second feed point 13 and the second ground point 15 are arranged opposite each other along a second direction. The first direction and the second direction intersect. In one embodiment, the first direction and the second direction can be perpendicular to each other. The first feed point 12 is used to receive radio frequency signals and excite the radiator 10 to form a first polarized antenna. The second feed point 13 is used to receive radio frequency signals and excite the radiator 10 to form a second polarized antenna. The polarization direction of the first polarized antenna is the first direction, and the direction of the second polarized antenna is the second direction.

[0112] This scheme forms two polarized antennas by setting two feed points (first feed point 12 and second feed point 13) and two grounding points (first grounding point 14 and second grounding point 15) at the connection position between the first end 111 and the second end 112 of adjacent radiating structures 11. The polarization direction of the first polarized antenna can be perpendicular to the polarization direction of the second polarized antenna. The two polarized antennas are formed on a radiator 10, which effectively utilizes the position near the center position 10A of the radiator 10 for feeding and grounding. The formation of two polarized antennas is beneficial for saving antenna area and for miniaturizing the design of the radiator 10. Moreover, the first polarized antenna and the second polarized antenna have the same resonant frequency, for example, both are the first resonant frequency. However, because their polarization directions are different, although the two polarized antennas are formed on the same radiator, they can still have good isolation.

[0113] See Figure 6 Each of the aforementioned radiating structures 11 includes a first segment 115, a connecting segment 117, and a second segment 116 connected in sequence. The boundary line between the first segment 115 and the connecting segment 117 is designated as the first line C1, and the boundary line between the connecting segment 117 and the second segment 116 is designated as the second line C2. The first end 111 is the end of the first segment 115 facing the center position 10A, and the second end 112 is the end of the second segment 116 facing the center position 10A. Both the first segment 115 and the second segment 116 are non-linear. This design makes the first segment 115 and the second segment 116 non-linear, so that the first segment 115 and the second segment 116 have extended areas in both the first and second directions, which can prevent the current on the first segment 115 and the current on the second segment 116 from completely canceling out. If the first segment 115 and the second segment 116 were both linear, when the two linear branches extend in parallel, the currents on them would be opposite, resulting in current cancellation. This solution, through the design of the non-linear first segment 115 and second segment 116, ensures that even if only a portion of the first segment 115 and a portion of the second segment 116 are parallel to each other, there are still other portions of the first segment 115 and other portions of the second segment 116 that are not parallel to each other. If the currents of the parallel portions can cancel each other out, the non-parallel portions of the first segment 115 and second segment 116 can still participate in radiation. Therefore, this application can guarantee that the first segment 115 and second segment 116 can at least partially participate in the radiation of radio frequency signals in the first resonant state.

[0114] In one embodiment, the average linewidth of the first segment 115 and the second segment 116 is greater than the average linewidth of the connecting segment 117. The average linewidth of the radiator is a key parameter describing its geometry, primarily used to characterize the average width of the radiator along the main current flow path. It refers to the average width of the cross-section of the radiator (such as a metal oscillator, patch, or wire) perpendicular to the current direction within the effective radiation area. Simply put, it is the value obtained by averaging the widths at different locations of the radiator, reflecting the overall "thickness" of the radiator. Linewidth directly affects the current density distribution on the radiator; a wider linewidth can reduce current density and conductor loss. This solution, by constraining the average linewidth of the first segment 115 and the second segment 116 to be greater than the average linewidth of the connecting segment 117, helps ensure the radiation efficiency of the first segment 115 and the second segment 116. The conductor loss of the first segment 115 and the second segment 116 is smaller than that of the connecting segment 117, ensuring their efficiency in radiating radio frequency signals. Furthermore, by constraining the average linewidth of the first segment 115 and the second segment 116 to be greater than the average linewidth of the connecting segment 117, this application also facilitates the adjustment of the input impedance matching and operating bandwidth of the radiator 10.

[0115] See Figure 6 In one embodiment, the radial structure 11 is symmetrically distributed around a third centerline L3, which forms a 45-degree angle with both the first and second directions. The first segment 115 and the second segment 116 are symmetrically distributed on both sides of the third centerline L3, and the midpoint of the connecting segment 117 is located on the third centerline L3. In another embodiment, the connecting segment 117 includes a third segment 1171 and a fourth segment 1172, with the midpoint of the connecting segment 117 being the intersection of the third segment 1171 and the fourth segment 1172. The third segment 1171 and the fourth segment 1172 are symmetrically distributed on both sides of the third centerline L3. The first segment 115, the third segment 1171, the fourth segment 1172, and the second segment 116 are connected sequentially.

[0116] In one embodiment, each of the connecting segments 117 includes a top end 1173, which is located at the midpoint of the connecting segment 117 and at the outer edge of the radiator 10 away from the center position 10A. The connection between the third segment 1171 and the fourth segment 1172 is the top end 1173 of the connecting segment 117, which is located at the outer edge of the connecting segment 117 away from the center position 10A.

[0117] In one embodiment, the electrical length between the top end 1173 of the connecting segment 117 and the first end 111 is one-quarter of the wavelength corresponding to the resonant frequency of the first resonance.

[0118] In one embodiment, the connecting segment 117 has multiple bends, each bend being formed by the intersection of two perpendicular branches. The number of bends is odd, and the bend at the middle position is where the third segment 1171 and the fourth segment 1172 intersect. Both the third segment 1171 and the fourth segment 1172 have at least one bend. Figure 6 In the illustrated embodiment, the third segment 1171 has two bends, and the fourth segment 1172 also has two bends. That is, both the third segment 1171 and the fourth segment 1172 are composed of three sequentially connected and mutually perpendicular straight branches. This design sets the connecting segment 117 to have multiple bends, which is beneficial for setting a longer connecting segment 117 per unit area, and is beneficial for miniaturizing the overall size of the radiator.

[0119] In other embodiments, the connecting segment 117 includes any one or a combination of arc-shaped, L-shaped, straight, wavy, and W-shaped shapes.

[0120] See Figure 5 and Figure 6 In the radiator 10 provided in this application embodiment, each radiating structure 11 is symmetrically distributed with the third center line L3 as the center of symmetry, and adjacent radiating structures 11 are symmetrically distributed with the first center line L1 and the second center line L2 as the centers of symmetry. Such a symmetrical distribution design is beneficial to adjusting the impedance and bandwidth of the radiator 10.

[0121] Figure 7 yes Figure 6 A schematic diagram of the inner ring branches formed by the interconnection of the first segment of the radial structure and the second segment of the adjacent radial structure. (See also...) Figure 5 and Figure 7 The first segment 115 is interconnected with the second segment 116 of the adjacent radiating structure to form inner ring branches 119. The number of inner ring branches 119 is the same as the number of radiating structures 11, and they are arranged sequentially around the center position 10A in a circumferential direction. A straight gap 118 is formed between two adjacent inner ring branches 119. In one embodiment, the number of radiating structures 11 and the number of inner ring branches 119 are both four, and the gaps 118 between the four inner ring branches 119 form a cross-shaped gap structure. In another embodiment, the inner ring branches 119 are C-shaped. This solution, by constraining the inner ring branches 119 to be arranged circumferentially around the center position 10A and forming a straight gap 118 between adjacent inner ring branches 119, is beneficial to the miniaturization of the overall size of the radiator 10.

[0122] In one implementation, see [reference] Figure 7The inner ring branch 119 is a patch structure with a slit 1191 and a through hole 1192. The slit 1191 connects the through hole 1192 and the edge of the inner ring branch 119, and forms an opening 1193 at the edge of the inner ring branch 119. The opening 1193 separates the connecting segments 117 of adjacent radiating structures 11. In one embodiment, the through hole 1192 is octagonal, circular, hexagonal, quadrilateral, triangular, etc. The slit 1191 is straight. This solution can adjust the electrical length and current distribution of the inner ring branch 119 by setting the shape of the slit 1191 and the through hole 1192, which is beneficial for adjusting the impedance and bandwidth of the radiator 10.

[0123] See Figure 5 The connecting segments 117 are arranged sequentially along the circumference and form the outer contour of the radiator 10. The outer contour of the radiator 10 can be square, circular, or isocentrically symmetrical.

[0124] In one embodiment, two of the four inner ring branches 119 are arranged along a first direction, and the other two of the four inner ring branches 119 are arranged along a second direction. The inner ring branches 119 participate in the generation of a first resonance by the radiator 10.

[0125] Figure 8 yes Figure 5 The diagram shows the current direction of the radiator in its first resonant state and under its first polarization direction. (See attached diagram.) Figure 8 The radiator 10, which generates the first resonance, receives the radio frequency signal from the first feed point 12 and is excited to form a first polarized antenna. The first polarized antenna can also be understood as horizontally polarized. When the radiator 10 is excited to generate the first resonance and forms the first polarized antenna, the current distribution of the two inner ring branches 119 arranged along the first direction is in the same direction, and the current direction of the connecting segment 117 extending along the first direction is also in the same direction. The currents on the radiator 10 along the first direction are superimposed, and the currents on the radiator 10 along the second direction are canceled out; therefore, the radiator 10 can form the first polarized antenna.

[0126] Figure 8 In the schematic diagram of current direction shown, the current direction of the two inner ring branches 119 arranged along the first direction is from right to left. Specifically, the current direction of these four branches (branch A3-B5, branch A3-B6, branch B7-A4, and branch B8-A4) is from right to left. The current direction of the connecting segments 117 extending along the first direction is from right to left. Specifically, the current direction of the portions extending along the first direction in branches D2-B2, B1-D1, D4-B4, and B3-D3 is from right to left.

[0127] Figure 8 In the schematic diagram of current direction shown, the current direction of the connecting segment 117 extending along the second direction includes the opposite direction. For example, the current direction of the portion extending along the second direction in branch B5-D1 is from bottom to top; the current direction of the portion extending along the second direction in branch B6-D3 is from top to bottom; the current direction of the portion extending along the second direction in branch B7-D2 is from top to bottom; and the current direction of the portion extending along the second direction in branch B8-D4 is from bottom to top. The current directions of the two inner ring branches 119 arranged along the second direction each include two opposite directions. For example, the current directions of branches A1-B1 and A1-B2 are opposite, with the current direction of branch A1-B1 from bottom to top and the current direction of branch A1-B2 from top to bottom; the current directions of branches A2-B3 and A2-B4 are opposite, with the current direction of branch A2-B3 from top to bottom and the current direction of branch A2-B4 from bottom to top. Regarding the overall current direction of the two inner ring branches 119 arranged along the second direction, the current direction of one inner ring branch (B2-A1-B1) is clockwise, and the current direction of the other inner ring branch (B4-A2-B3) is counterclockwise.

[0128] Figure 9 yes Figure 5 The diagram shows the current direction of the radiator in the second polarization direction. (See attached diagram.) Figure 9 The radiator 10, which generates the first resonance, receives the radio frequency signal from the second feed point 13 and is excited to form a second polarized antenna. The second polarized antenna can also be understood as vertically polarized. When the radiator 10 is excited to generate the first resonance and forms the second polarized antenna, the current distribution of the two inner ring branches 119 arranged along the second direction is in the same direction, and the current direction of the connecting segment 117 extending along the second direction is also in the same direction. The currents on the radiator 10 along the second direction are superimposed, and the currents on the radiator 10 along the first direction are canceled out; therefore, the radiator 10 can form a second polarized antenna.

[0129] Figure 9In the schematic diagram of current direction shown, the current direction of the two inner ring branches 119 arranged along the second direction is both from top to bottom. Specifically, the current direction of these four branches (branches B1-A1, B2-A1, A2-B3, and A2-B4) is from top to bottom. The current direction of the connecting segments 117 extending along the second direction is also from top to bottom. Specifically, the current direction of the portions of branches D1-B5, B6-D3, D2-B7, and B8-D4 extending along the second direction is from top to bottom.

[0130] Figure 9 In the schematic diagram of current direction shown, the current direction of the connecting segment 117 extending along the first direction includes the opposite direction. For example, the current direction of the portion extending along the first direction in branch D1-B1 is from left to right; the current direction of the portion extending along the first direction in branch B2-D2 is from right to left; the current direction of the portion extending along the first direction in branch B3-D3 is from right to left; and the current direction of the portion extending along the first direction in branch B4-D4 is from left to right. The current directions of the two inner ring branches 119 arranged along the first direction each include two opposite directions. For example, the current directions of branches A3-B5 and A3-B6 are opposite, with the current direction of branch A3-B5 from left to right and the current direction of branch A3-B6 from right to left; the current directions of branches A4-B7 and A4-B8 are opposite, with the current direction of branch A4-B7 from right to left and the current direction of branch A4-B8 from left to right. Regarding the overall current direction of the two inner ring branches 119 arranged along the second direction, the current direction of one inner ring branch (B5-A3-B6) is clockwise, and the current direction of the other inner ring branch (B7-A4-B8) is counterclockwise.

[0131] See Figure 8 and Figure 9 When the radiator 10 is excited to generate the first resonance, the radiator 10 has four zero current points. Specifically, in one embodiment, the number of radiating structures is four and they are evenly distributed around the central position, and the tops of the connecting segments 117 (the four positions D1, D2, D3, and D4) are the zero current points of the radiator in the first resonance state.

[0132] The dual-polarized antenna provided in this application is a dual-band dual-polarized antenna, and the antenna's operating frequencies include a first resonance and a second resonance. For example, the second resonance is a second harmonic mode of the first resonance. In one embodiment, the first resonance is a low-frequency antenna, for example, the range of the first resonance includes the 2GHz frequency band, and the second resonance is a high-frequency antenna, for example, the range of the second resonance includes the 5GHz frequency band. In one embodiment, the resonant frequency of the first resonance is located between 2.4GHz and 2.5GHz, and the resonant frequency of the second resonance is located between 5.15GHz and 5.85GHz. In one embodiment, the dual-polarized antenna is applied to base station communication; for example, the resonant frequency of the first resonance is close to 900MHz, and the resonant frequency of the second resonance is close to 1800MHz. In addition to these applications, this application can also cover other mobile communication networks.

[0133] In one embodiment, when the radiator is excited to generate a second resonance, the electrical length of the closed loop formed by the radiator is M times the wavelength corresponding to the resonant frequency of the second resonance, where M is greater than or equal to 3 and less than or equal to 5. In a specific embodiment, the electrical length of the closed loop is four times the wavelength corresponding to the resonant frequency of the second resonance.

[0134] In one implementation, see [reference] Figure 6 The electrical length of the first segment 115 is one-quarter of the wavelength corresponding to the resonant frequency of the second resonance. The electrical length of the second segment 116 is one-quarter of the wavelength corresponding to the resonant frequency of the second resonance.

[0135] In one implementation, see [reference] Figure 6 The electrical lengths of the third segment 1171 and the fourth segment 1172 of the connecting segment 117 are both one-quarter of the wavelength corresponding to the resonant frequency of the second resonance. In one embodiment, the electrical length of the connecting segment 117 is half the wavelength corresponding to the resonant frequency of the second resonance.

[0136] The electrical length of the closed loop constrained by this scheme or the electrical length of other branches (such as the first segment, the second segment, etc.) is a value close to it. For example, half of the wavelength corresponding to the resonant frequency of the second resonance can be understood as a range close to half of the wavelength corresponding to the resonant frequency of the second resonance, such as the range between 0.3 times the wavelength and 0.7 times the wavelength.

[0137] In the second resonant state, the radiator of the dual-polarized antenna provided in this application also has polarization in a first direction and polarization in a second direction.

[0138] Figure 10 yes Figure 5The diagram shows the current direction of the radiator in the second resonant state, under the first polarization direction. (See attached diagram.) Figure 10 The radiator that generates the second resonance receives the radio frequency signal from the first feed point 12 and is excited to form a first polarized antenna. The first polarized antenna can also be understood as horizontally polarized. When the radiator 10 is excited to generate the second resonance and forms the first polarized antenna, the current distribution of the two inner ring branches 119 arranged along the first direction is in the same direction, and the current direction of the connecting segment 117 extending along the first direction is also in the same direction.

[0139] Figure 11 yes Figure 5 The diagram shows the current direction of the radiator in the second resonant state and under the second polarization direction. (See attached diagram.) Figure 11 The radiator that generates the second resonance receives the radio frequency signal from the second feed point 13 and is excited to form a second polarized antenna. The second polarized antenna can also be understood as vertically polarized. When the radiator 10 is excited to generate the second resonance and forms the second polarized antenna, the current distribution of the two inner ring branches 119 arranged along the second direction is in the same direction, and the current direction of the connecting section 117 extending along the second direction is also in the same direction. For details on the current distribution of each branch, please refer to [reference needed]. Figure 10 and Figure 11 ,and Figure 8 and Figure 9 The relevant descriptions are similar and will not be repeated here.

[0140] See Figure 10 and Figure 11 When the radiator is excited to produce a second resonance, the radiator 10 has eight zero-current points. Specifically, in one embodiment, the number of radiating structures is four and they are evenly distributed around the central position. The positions where the connecting segment connects to the first segment and the connecting segment connects to the second segment are the zero-current points. Specifically, positions B1, B2, B3, B4, B5, B6, B7, and B8 are the eight zero-current points.

[0141] Figure 5 The radiator shown has a substantially square outer contour and can be formed on a square substrate. The connections between adjacent radiating structures within the radiator are either integral connecting lines or patch structures. In other embodiments, the outer contour of the radiator can have other shapes, and the connections between adjacent radiating structures can be non-integral connection structures, for example... Figure 12 The provided implementation offers a different design approach, which is described in detail below.

[0142] Figure 12 This is a schematic diagram of the radiator structure of a dual-polarized antenna according to one embodiment of this application. (See also...) Figure 12The radiator provided in this embodiment and Figure 5 The differences between the provided radiators are: the overall outer contour shape of the radiators is different, the shape of the connecting segments of the radiating structure is different, the connection structure between the first segment of the radiating structure and the second segment of the adjacent radiating structure is different, and the resonance range of the radiators is different.

[0143] See Figure 12 In one embodiment, the overall outer contour of the radiator 10 can be circular. The radiator 10 includes four radiating structures 11, each including a first segment 115, a connecting segment 117, and a second segment 116, with the connecting segment 117 being arc-shaped. The four connecting segments 117 are four arc-shaped segments that form the outer contour of the radiator 10. The first end 111 of the first segment 115 of the radiating structure 11 and the second end 112 of the second segment 116 of the adjacent radiating structure 11 are connected by an electrical connection structure 1156 independent of the first segment 115 and the second segment 116. In this embodiment, adjacent radiating structures 11 are not directly connected to each other, but are interconnected through the electrical connection structure 1156, which sequentially connects all the radiating structures 11 to form a closed loop.

[0144] Figure 12 The radiator shown is used to excite a dual-polarized antenna. The radiator can be excited to generate multiple resonant modes, including a second resonance and a third resonance. The resonant frequency of the second resonance is higher than that of the first resonance, and the resonant frequency of the third resonance is higher than that of the second resonance. The radiator provided by this solution can be excited to generate the second and third resonances, which can be used to form a broadband antenna, extending the frequency range covered by the antenna.

[0145] This can be understood as, Figure 12 In one embodiment, the radiator can be excited to generate a first resonance, a second resonance, and a third resonance. The dual-polarized antenna excites the radiator to generate the second and third resonances within the 5150MHz-7150MHz frequency band. This solution provides specific coverage ranges for the second and third resonances; for example, the second resonance can be a double mode of the first resonance, and the third resonance can be a triple mode of the first resonance. The dual-polarized antenna provided by this solution can utilize the second and third resonances excited by the radiator, enabling the antenna to generate a wider bandwidth at high frequencies. In one possible implementation, the second and third resonances are higher-order resonance modes of the radiator, and the first resonance is the fundamental mode resonance mode of the radiator. The higher-order resonance modes and the fundamental mode resonance mode exhibit an approximate harmonic relationship.

[0146] Figure 12In the illustrated embodiment, the electrical length of the closed loop formed by the radiator is M times the wavelength corresponding to the resonant frequency of the second resonance, where M is greater than or equal to 3 and less than or equal to 5. In a specific embodiment, the electrical length of the closed loop is four times the wavelength corresponding to the resonant frequency of the second resonance. The electrical length of the closed loop is T times the wavelength corresponding to the resonant frequency of the third resonance, where T is greater than or equal to 5 and less than or equal to 7. In a specific embodiment, the electrical length of the closed loop is six times the wavelength corresponding to the resonant frequency of the third resonance.

[0147] Figure 12 In the illustrated embodiment, when the radiator 10 is excited to produce the second and third resonances, the radiator 10 has eight current zero points. Specifically, in one embodiment, the number of radiating structures 11 is four and they are evenly distributed around the central position. The positions where connecting segment 117 and the first segment 115 are connected, and the positions where connecting segment 117 and the second segment 116 are connected, are current zero points. Specifically, positions B1, B2, B3, B4, B5, B6, B7, and B8 are current zero points.

[0148] In one implementation, based on Figure 12 The scheme shown allows for the use of the dual-polarized antenna without using its fundamental frequency mode (which can be understood as the first resonance). The dual-polarized antenna can be tuned to its second and third resonance modes, thus obtaining a dual-polarized antenna with a wider frequency range.

[0149] based on Figure 5 and Figure 12 The radiator shown in this application may also include other forms of the dual-polarized antenna. The shape of the connecting segment can be adjusted, and the shape of the inner ring spurs formed by the first and second segments can also be changed. By adjusting the spurs at different positions of the radiator, such as adjusting their width, extension length, bending angle, etc., the impedance and bandwidth of the radiator can be adjusted.

[0150] The dual-polarized antenna radiator provided in this application can be fed directly by an RF cable. For example, the RF cable can be connected to the center of the radiator, and a first polarized antenna can be formed by connecting the RF cable to a first feed point and a first ground point. A second polarized antenna can be formed by connecting the RF cable to a second feed point and a second ground point. The dual-polarized antenna radiator can also be fed in other ways, such as a balun structure.

[0151] In one embodiment, the radiator is mounted on a top plate, and a plate assembly is formed by connecting the top and bottom plates via a vertical plate assembly. This plate assembly structure can be understood as a modular support structure for mounting the antenna. The vertical plate assembly and the bottom plate are used to mount the antenna's feed assembly and grounding structure. Fixing the modular support structure in the communication equipment offers advantages such as structural stability and ease of assembly. A structurally stable antenna also contributes to stable radiation performance.

[0152] Figure 13 This is a schematic diagram of the radiator of a dual-polarized antenna provided in one embodiment of this application disposed on a top plate. Figure 13 The radiator shown in the figure is Figure 5 The radiator provided in the illustrated embodiment. See also Figure 13 In one embodiment, the radiator 10 is formed on the surface of a top plate 105, which is an insulating dielectric plate and can be square. The center position 10A of the radiator 10 is located near the intersection of the two diagonals of the top surface of the top plate 105. In another embodiment, the center point of the center position 10A of the radiator 10 coincides with the intersection of the two diagonals of the top surface of the top plate 105. The top ends 1173 of the four connecting segments 117 of the radiator 10 are located at the four corners of the top plate 105.

[0153] In one embodiment, the top plate 105 has only one metal layer, which constitutes the radiator 10. The radiator 10 can be disposed on the top surface of the top plate 105, the bottom surface of the top plate 105, or the middle layer of the top plate 105. In another embodiment, the top surface of the top plate 105 is the surface of the top plate 105 facing the top cover of the communication device and away from the motherboard of the communication device. The radiator 10 is disposed on the top surface of the top plate 105. There are no other metal structures or screen radio frequency signal structures between the top surface of the top plate 105 and the top cover of the communication device, which is beneficial to the electrical connection between the radiator 10 and the power supply components and grounding structure, and also ensures the radiation performance of the radiator.

[0154] In other embodiments, the top plate can also be an integral structure with the top cover of the communication device, that is, a portion of the top cover of the communication device constitutes a top plate for mounting the radiator. In this case, the radiator can be disposed on the inner surface of the top cover.

[0155] See Figure 13The top plate 105 is provided with four insertion holes 1051. These four insertion holes 1051 are arranged around the center position 10A of the radiator 10. The arrangement of the insertion holes 1051 causes the area of ​​the inner ring branch 119 of the radiator 10 near the center position 10A to form a groove 1194. The opening of the groove 1194 faces the center position 10A. In one embodiment, the insertion hole 1051 is located on the same side of the first center line L1 or the second center line L2, and the edge of the insertion hole 1051 is adjacent to or located on the first center line L1 or the second center line L2. In this way, the first feed point 12, the second feed point 13, the first ground point 14, and the second ground point 15 of the radiator 10 can be set on the first center line L1 or the second center line L2. This design helps to ensure that the radiation pattern of the radiator 10 is relatively positive, that is, the main lobe of the radiation pattern is clearly pointed, the side lobe is well suppressed, and the symmetry is high. Thus, the dual-polarized antenna can have the following advantages: concentrated energy utilization, improved communication efficiency; reduced interference, improved anti-interference capability; precise directional control, adapting to scenario requirements; optimized system performance, reducing design complexity.

[0156] See Figure 13 In one embodiment, the connection between the first end 111 of any of the radiating structures 11 and the second end 112 of an adjacent radiating structure 11 is an integral wire structure formed on the top plate 105. The insertion hole 1051 does not break the inner ring branch 119; that is, even with the insertion hole 1051, the first end 111 of the radiating structure 11 and the second end 112 of the adjacent radiating structure 11 remain interconnected, and the radiators 10 on the surface of the top plate 105 remain closed loops connected end-to-end. The first feed point 12, the second feed point 13, the first ground point 14, and the second ground point 15 of the radiators 10 are respectively located adjacent to these four insertion holes 1051. Insertion hole 1051 is used to receive structural components for providing feed lines or grounding structures that electrically connect the first feed point 12, the second feed point 13, the first ground point 14, and the second ground point 15. The feed lines or grounding structures can be metal structures formed on an insulating medium. The insulating medium is inserted into insertion hole 1051 such that the feed lines thereon are electrically connected to the first feed point 12 and the second feed point 13, and that the grounding structures thereon are electrically connected to the first ground point 14 and the second ground point 15.

[0157] In one embodiment, the inner wall of the insertion hole 1051 adjacent to the first center line L1 or the second center line L2 is provided with a metal layer, which can be connected to the radiator formed on the surface of the top plate 105. This design is beneficial to improving the reliability of the electrical connection between the feed line or grounding structure and the first feed point 12, the second feed point 13, the first grounding point 14 and the second grounding point 15 of the radiator 10.

[0158] In other embodiments, the first end 111 of any one of the radiating structures 11 and the second end 112 of an adjacent radiating structure 11 are two discontinuous wire segments formed on the top plate. An electrical connection between the first end and the second end is achieved through an electrical connection structure on the top plate. This solution provides a method by setting four discontinuous radiating structures on the top plate and then connecting all the radiating structures into a closed loop. Although this solution has a complex structure, the electrical connection structure can be positioned as a matching device or an inductor. This allows for adjustment of the electrical length of the radiator. Even if the electrical length of all the radiating structures does not meet the requirements, an inductor can be placed at the electrical connection structure position to extend its electrical length, which is beneficial for the design of small-sized radiators.

[0159] Specifically, combined Figure 13 In the scheme shown, in other schemes, the insertion hole 1051 position can also be a slit structure formed on the inner ring branch. The slit makes the inner ring branch 119 discontinuous, or the slit makes it impossible for part of the radiator formed on the top plate surface to form a closed ring. However, an electrical connection structure, such as a conductive sheet or conductive cloth, can be added to the surface of the top plate to connect the inner ring structure at the slit position, so that the radiator forms a closed ring. In this scheme, the radiator includes the patch structure formed on the top plate surface and the electrical connection structure of the electrical connection patch structure.

[0160] Figure 14A This is a schematic diagram of a portion of the radiators of a dual-polarized antenna provided in one embodiment of this application being disposed on a top plate. Figure 14B yes Figure 14A The schematic diagram of the top plate and all radiators corresponding to the embodiment shown. Figure 14A and Figure 14B The radiator shown in the figure is Figure 12 The illustrated embodiment provides a portion of the radiator. See also... Figure 14A and Figure 14B In one embodiment, the top plate 105 is circular, and a portion of the radiators 10 are formed on the top plate 105. Four radiating structures 11 located on the top plate 105 are independent of each other and not interconnected. The first end 111 of the first segment 115 of the radiating structure 11 and the second end 112 of the second segment 116 of the adjacent radiating structure 11 are connected by an electrical connection structure 1156 independent of the first segment 115 and the second segment 116. The electrical connection structure 1156 sequentially connects all the radiating structures 11, forming a closed loop.

[0161] See Figure 14AIn one embodiment, the top plate 105 has four hollow areas 105W extending from the edge of the top plate 105 towards the center position 10A. Each hollow area 105W is located between two adjacent radial structures 11. Each hollow area 105W includes a straight slit W1 and a polygonal through hole W2. The through hole W2 may also be circular. The through hole W2 has straight slits W1 on both sides in the radial direction. The gap W3 between the through hole W2 and the center position 10A is used to install the electrical connection structure 1156.

[0162] See Figure 14A and Figure 14B In one embodiment, the electrical connection structure 1156 includes two first connection portions 561 and a second connection portion 562. The two first connection portions are located on the top surface of the top plate 105, and the two first connection portions 561 respectively cover the first end 111 of the radiating structure 11 and the second end 112 of the adjacent radiating structure 11. Both first connection portions 561 are conductive and contact the first end 111 of the radiating structure 11 and the second end 112 of the adjacent radiating structure 11. The second connection portion 562 passes through the gap W3 between the through hole W2 and the center position 10A, and a portion of the second connection portion 562 is connected between the two first connection portions 561. The surfaces of the second connection portion 562 and the first connection portion 561 that contact each other have a second conductive layer. The second conductive layers of the second connection portion 562 are arranged in pairs on the two surfaces of the second connection portion 562, and the second connection portion 562 is provided with a conductive hole 5621 for electrically connecting the two second conductive layers. This solution achieves electrical connection between two first connecting parts 561 through the cooperation of the second conductive layer on the second connecting part 562 and the conductive hole 5621. The electrical connection between the two first connecting parts 561 is achieved through the electrical connection relationship between the two first connecting parts 561. Therefore, this solution interconnects four electrical connection structures 1156 and four radiation structures 11 formed on the top plate 105 to form a closed ring-shaped radiator.

[0163] Figure 15 This is a schematic diagram of the radiator of a dual-polarized antenna according to one embodiment of this application. (See also...) Figure 15 In one embodiment, the radiator 10 is an antenna with a conductive sheet structure. The radiator 10 is not disposed on an insulating dielectric plate. For example, the radiator 10 can be a metal sheet antenna, and the material of the radiator 10 can be (but is not limited to) steel sheet. Figure 15 The radiator 10 shown and Figure 14A The radiators shown have the same basic components, but some branches have different morphologies. For example... Figure 15As shown, the radiator 10 is generally a square patch, and its outer contour is square. The radiator 10 includes four radiating structures 11. Each radiating structure 11 is approximately square, and the ends (first or second ends) of adjacent radiating structures 11 near their center positions 10A are interconnected, such that all radiating structures 11 are connected sequentially to form a closed loop. Each radiating structure includes a first segment 115, a connecting segment 117, and a second segment 116 connected sequentially. In this embodiment, the connecting segment 117 includes two straight branches that are perpendicularly connected to each other, and all connecting segments 117 constitute the outer contour of the radiator 10. The first segment 115 of one of the radiating structures 11 is connected to the second segment 116 of the adjacent radiating structure 11 to form an inner ring branch 119. The outer contour of the inner ring branch 119 is approximately square.

[0164] The radiator 10 includes a first feed point 12, a second feed point 13, a first ground point 14, and a second ground point 15. The distribution of the first feed point 12, the second feed point 13, the first ground point 14, and the second ground point 15 can be referred to the aforementioned embodiments and will not be repeated here.

[0165] Figure 15 In the illustrated embodiment, the radiator can be directly fed via an RF cable or via a balun structure. The radiator can be assembled and fixed with an insulating support or insulating shell within the communication equipment, or it can be suspended inside the communication equipment.

[0166] Figure 15 The radiator 10 shown has a first polarization and a second polarization, and can be excited to generate a first resonance and a second resonance. The specific parameters of the first polarization and the second polarization, as well as the first resonance and the second resonance, can be found in the foregoing embodiments and will not be repeated here.

[0167] In one embodiment, the dual-polarized antenna provided in this application is mounted on a board assembly architecture. A board assembly is formed by interconnecting a top plate, a bottom plate, and a vertical plate assembly. The radiators, feeding components, and grounding structures are all mounted on the board assembly. This can be understood as the board assembly enabling the dual-polarized antenna to form a modular structure, facilitating assembly. The feeding wires and grounding structure are formed on the board assembly, reducing the complexity of the wiring within the communication equipment. Only the cables connecting to the RF chip on the motherboard need to be connected to the feeding port on the bottom plate. The feeding port on the bottom plate can connect to multiple radiators; one bottom plate can correspond to two, three, four, six, etc., eliminating the need for separate feeding for each radiator. Signal transmission from the feeding port to the radiator requires a microstrip line or transmission line structure mounted on the board assembly, eliminating the need for additional RF cables. Therefore, this design reduces the number of cables inside the communication equipment, facilitating assembly, making the space cleaner, and simplifying maintenance.

[0168] Figure 16 This is a schematic diagram of a dual-polarized antenna provided in one embodiment of this application. In this embodiment, the structure of the radiator of the dual-polarized antenna is similar to... Figure 5 The radiators shown have the same structure. Figure 16 The illustrated implementation provides a Figure 5 A specific power supply and grounding scheme for the radiator shown. Figure 16 include Figure 13 The top plate and the radiators on it are shown.

[0169] In one embodiment, the dual-polarized antenna includes a first feeding component 21 and a second feeding component 22. The first feeding component 21 includes a first feeding port 211, a first power divider circuit 212, and a first feeding structure 213. Figure 16 In the diagram, the portion of the radiator located at the second feed point 13 and the second ground point 15 is indicated by dashed lines due to obstruction. The first feed structure 213 is also obstructed, and the surface where the line indicated by the label is located is schematically represented as the first feed structure 213. The second feed assembly 22 includes a second feed port 221, a second power divider circuit 222, and a second feed structure 223. The first feed assembly 21 and the second feed assembly 22 are used to feed the first feed point 12 and the second feed point 13 of the radiator 10, respectively. In other embodiments, the dual-polarized antenna may not have the first power divider circuit 212 and the second power divider circuit 222; the radio frequency signals input to the first feed port 211 and the second feed port 221 directly feed the radiator 10. The power divider circuit can be used to form a parallel circuit for multiple radiators; when the antenna has only one radiator, the power divider circuit is not required.

[0170] See Figure 16 In one embodiment, the dual-polarized antenna includes a top plate 105, a bottom plate 106, and a vertical plate assembly 107. The top plate 105 and the bottom plate 106 are disposed opposite to each other, and the vertical plate assembly 107 is connected between the top plate 105 and the bottom plate 106. The radiator 10 is located on the top plate 105. The vertical plate assembly 107 and the bottom plate 106 are used to provide a first feed assembly 21 and a second feed assembly 22. The first feed assembly 21 is used to transmit radio frequency signals to the first feed point 12, and the second feed assembly 22 is used to transmit radio frequency signals to the second feed point 13. A first power divider circuit 212, a second power divider circuit 222, a first feed port 211, and a second feed port 221 are disposed on the bottom plate 106. A first feed structure 213 and a second feed structure 223 are disposed on the vertical plate assembly 107.

[0171] In one embodiment, the upright plate assembly 107 is further provided with a first grounding structure. Figure 16The middle section is obscured and cannot be marked; further detailed illustrations will follow. The second grounding structure ( Figure 16 (The image is obscured and cannot be shown; further detailed illustrations will follow). The first grounding structure is connected between the first grounding point 14 of the radiator 10 and the grounding layer 1061 of the base plate 106, and the second grounding structure is connected between the second grounding point 15 of the radiator 10 and the grounding layer 1061 of the base plate 106. In one embodiment, the grounding layer 1061 is located on the surface of the base plate 106 opposite to the top plate 105, and the grounding layer 1061 can cover the entire area of ​​the base plate 106. The grounding layer 1061 is electrically connected to the system ground of the communication equipment.

[0172] In one embodiment, a first power divider circuit 212, a second power divider circuit 222, a first feed port 211, and a second feed port 221 are disposed on the surface of the base plate 106 facing the top plate 105. The first feed port 211 and the second feed port 221 are used to electrically connect to a feed cable. The feed cable transmits the radio frequency signal from the RF chip to the first feed port 211 and the second feed port 221, and then transmits the signal to the radiator 10 via the first power divider circuit 212 and the second power divider circuit 222. The first feed port 211 and the first power divider circuit 212 are used to transmit the signal from the first polarized antenna having a first polarization direction, and the second feed port 221 and the second power divider circuit 222 are used to transmit the signal from the second polarized antenna having a second polarization direction. Both the first power divider circuit 212 and the second power divider circuit 222 have at least two branches, the number of which corresponds to the number of radiators 10. The first power divider circuit 212 and the second power divider circuit 222 are used to transmit the signals from the first polarized antenna and the second polarized antenna to at least two radiators 10, respectively. Figure 16 The diagram illustrates two radiators 10, but this application does not limit the number of radiators.

[0173] In one embodiment, mounting holes 1062 may be provided on the base plate 106, and the shape and size of the mounting holes 1062 match the shape and size of the bottom end of the upright plate assembly 107. Therefore, Figure 16The location of mounting hole 1062 is indicated by the outline of the intersection of the upright plate assembly 107 and the base plate 106. Inserting the bottom end of the upright plate assembly 107 into the mounting hole 1062 interconnects the base plate 106 and the upright plate assembly 107. The connection between the base plate 106 and the upright plate assembly 107 can be fixed by soldering or adhesive. The upright plate assembly 107 connects between the base plate 106 and the top plate 105. In addition to establishing the physical structural connection, it is also necessary to establish grounding and power supply electrical connections. The upright plate assembly 107 is provided with a grounding structure and a power supply structure. The grounding structure is electrically connected between the grounding layer 1061 of the base plate 106 and the first grounding point 14 and the second grounding point 15 of the radiator 10. The power supply structure is electrically connected between the first power divider circuit 212, the second power divider circuit 222 and the first power supply point 12 and the second power supply point 13 of the radiator 10. Signal transmission can be achieved between the power supply structure and the first power supply point 12 and the second power supply point 13 through coupling. Signal transmission can be achieved through direct connection between the power supply structure and the first power divider circuit 212 and the second power divider circuit 222.

[0174] Figure 17 , Figure 18 , Figure 19 and Figure 20 This is a schematic diagram of the assembly of the vertical plate assembly and the top plate in a dual-polarized antenna provided in one embodiment of this application. Figure 17 , Figure 18 , Figure 19 and Figure 20 The structure of the vertical panel assembly is shown from four different angles. (See also...) Figure 17 , Figure 18 , Figure 19 and Figure 20 In these four figures, the section marked with cross-sectional lines represents the bottom end 1072 of the upright plate assembly 107. The bottom end 1072 of the upright plate assembly 107 is used to insert into the mounting hole 1062 of the base plate 106 and connects to the base plate 106. Figure 17 , Figure 18 , Figure 19 and Figure 20 The shape of the bottom end 1072 of the neutral plate assembly 107 clearly defines the shape of the mounting holes 1062 on the base plate 106. The upright plate assembly 107 includes a first upright plate 71 and a second upright plate 72, which intersect and are both connected between the top plate 105 and the base plate 106. In one embodiment, both the first upright plate 71 and the second upright plate 72 are circuit board structures. The first upright plate 71 is used to set the first feed structure 213 and the first ground structure 214 of the first polarized antenna, and the second upright plate 72 is used to set the second feed structure 223 and the second ground structure 224 of the second polarized antenna. In one embodiment, the first upright plate 71 and the second upright plate 72 are perpendicular to each other.

[0175] Figure 21 This is a schematic diagram of the vertical plate assembly in a dual-polarized antenna according to one embodiment of this application. Figure 22 yes Figure 21 An exploded view of the vertical panel assembly in one direction is shown. Figure 23 yes Figure 21 An exploded view of the vertical panel assembly from another direction. (See also...) Figure 21 , Figure 22 and Figure 23 In one embodiment, four insertion portions 1703 protrude from the top of the upright plate assembly 107. Specifically, the first upright plate 71 has two first insertion portions 713, and the second upright plate 72 has two second insertion portions 723. These four insertion portions 1703 are respectively inserted into the four insertion holes 1051 on the top plate 105, realizing not only the physical connection between the upright plate assembly 107 and the top plate 105, but also the electrical connection between the first grounding point 14, the second grounding point 15 of the radiator 10 and the ground. The first upright plate 71 has a first slot 7103 communicating to its bottom end, and the second upright plate 72 has a second slot 7201 communicating to its top end. The opening of the second slot 7201 of the second upright plate 72 is located between the two second insertion portions 723 at the top end of the second upright plate 72. The first upright plate 71 and the second upright plate 72 are assembled by inserting the first slot 7103 and the second slot 7201 together. The portion of the first upright plate 71 from the bottom of the first slot 7103 to the top end of the first upright plate 71 is received in the second slot 7201. The portion of the second upright plate 72 between the bottom of the second slot 7201 and the bottom end of the second upright plate 72 is housed within the first slot 7103.

[0176] See Figure 21 , Figure 22 and Figure 23 In one embodiment, the first upright plate 71 includes a first surface and a second surface disposed opposite to each other, and the second upright plate 72 includes a third surface and a fourth surface disposed opposite to each other. A first power supply structure 213 is disposed on the first surface of the first upright plate 71. A first grounding structure 214 is disposed on the second surface of the first upright plate 71. A second power supply structure 223 is disposed on the third surface of the second upright plate 72, and a second grounding structure 224 is disposed on the fourth surface of the second upright plate 72. In one embodiment, the first grounding structure 214 is a grounding layer structure disposed on the second surface of the first upright plate 71, and the first grounding structure 214 extends to a first insertion portion 713 at the top of the first upright plate 71 and contacts the first grounding point. The second grounding structure 224 is a grounding layer structure disposed on the fourth surface of the second upright plate 72, and the second grounding structure 224 extends to a second insertion portion 723 on the second upright plate 72 and contacts the second grounding point.

[0177] In one embodiment, the first feeding structure 213 is a transmission line structure disposed on the first surface of the first upright plate 71. The first feeding structure 213 includes a first coupling segment 2131, and a capacitor is formed between the first coupling segment 2131 and a portion of the radiator 10 where the first feeding point 12 is located. In one embodiment, the extension direction of the first coupling segment 2131 is a first direction. In another embodiment, the second feeding structure 223 is a transmission line structure disposed on the fourth surface of the second upright plate 72. The second feeding structure 223 includes a second coupling segment 2231, and a capacitor is formed between the second coupling segment 2231 and a portion of the radiator 10 where the second feeding point 13 is located. In one embodiment, the extension direction of the second coupling segment 2231 is a second direction. This application feeds the radiator by coupling feeding.

[0178] like Figure 22 The first coupling segment 2131 shown has partial transmission lines at both ends, ensuring that neither end of the first coupling segment 2131 is an open terminal. This guarantees the strength of the current distribution on the first coupling segment 2131 and improves the signal coupling efficiency of the first polarized antenna. Similarly, the second coupling segment 2231 also has partial transmission lines at both ends, ensuring that neither end of the second coupling segment 2231 is an open terminal. This guarantees the strength of the current distribution on the second coupling segment 2231 and improves the signal coupling efficiency of the second polarized antenna.

[0179] Figures 19 to 23 The board assembly architecture, power supply, and grounding design of any of the provided possible implementations can be applied to... Figure 14B and Figure 16 The radiator shown is not described further.

[0180] Figure 24 This is an S-parameter curve of a dual-polarized antenna provided in one embodiment of this application. (See also...) Figure 24 In one embodiment, the antenna provided in this application is a dual-band dual-polarization antenna. Figure 24 Curve S(1,1) represents the S11 curve of the first polarized antenna, curve S(2,2) represents the S11 curve of the second polarized antenna, and curve S(1,2) represents the isolation curve between the first and second polarized antennas. Figure 24 As can be seen, both the first and second polarized antennas have two resonances, one at 2.4 GHz and the other at 5.25 GHz. The different polarization directions of the first and second polarized antennas result in good isolation between them.

[0181] Figure 25 This is a schematic diagram of an antenna array provided in one embodiment of this application. (See also...) Figure 25Based on the dual-polarized antenna provided in this application, an antenna array includes three radiators (antenna elements). The array with three antenna elements provided in this application has a length of 181 mm and a width of 50 mm.

[0182] Figure 26 This is a schematic diagram of an antenna array provided by another design scheme; please refer to [link / reference]. Figure 26 , Figure 26 The provided antenna array is a dual-polarized antenna, with a first polarized antenna and a second polarized antenna separately arranged. The radiators of the first and second polarized antennas are spaced apart along the width direction. The first polarized antenna has four radiators spaced apart along the length direction, and the second polarized antenna also has four radiators spaced apart along the length direction. The overall dimensions of this antenna array are 181 mm in length and 98 mm in width. In one specific embodiment... Figure 26 The radiator of the antenna shown is a dipole antenna. Figure 26 In the illustrated scheme, the two polarized antennas are arranged separately, with a gap between them. If one polarized antenna has four radiators, then two polarized antennas would require eight radiators. This scheme of separately arranging the radiators of different polarized antennas makes it difficult to achieve antenna miniaturization.

[0183] contrast Figure 25 and Figure 26 The two diagrams show schemes based on the same (or similar) length dimensions. Figure 25 The scheme shown has an oscillator group consisting of three radiators. Figure 26 The illustrated scheme features an oscillator assembly consisting of four radiating elements. Given similar length dimensions, it is evident that... Figure 25 The width dimension of the dual-polarized antenna shown is close to Figure 26 The width of the dual-polarized antenna shown is half that of the antenna in this application. This clearly demonstrates that the dual-polarized antenna provided in this application can simultaneously form two polarized antennas through a radiator with a closed ring shape, thereby reducing the width dimension of the antenna array.

[0184] Furthermore, Figure 26In the illustrated scheme, the antenna radiator and power divider circuit are both mounted on the same circuit board. The circuit board and the main board within the communication equipment are fixed together by a mounting bracket, and a gap needs to be maintained between the circuit board and the main board. Because the antenna radiator and power divider circuit are both mounted on the same circuit board, it is difficult to miniaturize the board area of ​​the dual-polarized antenna. In contrast, the dual-polarized antenna provided in this application has the power divider circuit and radiator mounted on two parallel substrates, connected by a vertical plate assembly. The vertical plate assembly has feed lines and a grounding structure. The power divider circuit is mounted on a base plate, which is connected to the main board of the communication equipment. The distance between the base plate and the main board can be set closer. Therefore, the dual-polarized antenna provided in this application easily achieves miniaturization of the board area and does not require increasing the height of the communication equipment. Thus, the dual-polarized antenna provided in this application can still achieve miniaturization while maintaining a high current density.

[0185] Figure 27A , Figure 27B , Figure 27C , Figure 27D This is the radiation pattern of the dual-polarized antenna provided in this application. Figure 27A This is the radiation pattern of the first polarized antenna in the first resonant state. Figure 27B The radiation pattern of the first polarized antenna in the second resonant state is shown. Figure 27C This is the radiation pattern of the second polarized antenna in the first resonant state. Figure 27D The radiation pattern of the second polarized antenna in the second resonant state is shown. The polarization direction of the first polarized antenna is horizontal, and the polarization direction of the second polarized antenna is vertical. The first resonance includes resonances near 2 GHz, and the second resonance includes resonances near 5 GHz. These radiation patterns show that the dual-polarized antenna provided in this application has a relatively positive radiation pattern.

[0186] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology 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. A dual-polarized antenna, characterized in that, The device includes a radiator capable of being excited to generate a first resonance. The radiator has a central position and includes a radiating structure. The number of radiating structures is multiple and they are arranged sequentially around the central position in a circumferential direction. Each radiating structure includes a first end and a second end, and the first end and the second end are both located at the ends of the radiating structure facing the central position and are spaced apart. The first end of any one of the radiating structures is connected to the second end of the adjacent radiating structure to form a connection end. The radiating structures are connected end to end in sequence to form a closed loop. The electrical length of the closed loop is N times the wavelength corresponding to the resonant frequency of the first resonance, where N is greater than or equal to 1.5 and less than or equal to 2.

5. The number of connection ends is multiple, including a first connection end, a second connection end, a third connection end, and a fourth connection end. The first connection end includes a first feed point, the second connection end includes a second feed point, the third connection end includes a first ground point, and the fourth connection end includes a second ground point. The first feed point and the first ground point are arranged opposite each other along a first direction, and the second feed point and the second ground point are arranged opposite each other along a second direction. The first direction and the second direction intersect. The first feed point is used to receive radio frequency signals and excite the radiator to form a first polarized antenna. The second feed point is used to receive radio frequency signals and excite the radiator to form a second polarized antenna. The polarization direction of the first polarized antenna is the first direction, and the polarization direction of the second polarized antenna is the second direction.

2. The dual-polarized antenna according to claim 1, characterized in that, The radial structure includes a first segment, a connecting segment, and a second segment connected in sequence. The first end is the end of the first segment facing the center position, and the second end is the end of the second segment facing the center position. Both the first segment and the second segment are non-linear.

3. The dual-polarized antenna according to claim 2, characterized in that, The first segment is interconnected with the second segment of the adjacent radial structure and forms an inner ring branch. The number of inner ring branches is the same as the number of radial structures and they are arranged sequentially around the center position in a circular direction. A straight gap is formed between two adjacent inner ring branches.

4. The dual-polarized antenna according to claim 2, characterized in that, The first segment is interconnected with the second segment of the adjacent radial structure and forms an inner ring branch, the inner ring branch being C-shaped.

5. The dual-polarized antenna according to claim 3 or 4, characterized in that, The number of inner ring branches is four, and the inner ring branches form a cross-shaped gap.

6. The dual-polarized antenna according to claim 5, characterized in that, Two of the inner ring stubs are arranged along the first direction, and the other two inner ring stubs are arranged along the second direction; when the radiator is excited to generate a first resonance and forms the first polarized antenna, the current distribution of the two inner ring stubs arranged along the first direction is in the same direction; when the radiator is excited to generate a first resonance and forms the second polarized antenna, the current distribution of the two inner ring stubs arranged along the second direction is in the same direction.

7. The dual-polarized antenna according to any one of claims 3-6, characterized in that, The inner ring branch is a patch structure with a slit and a through hole. The slit connects the through hole and the edge of the inner ring branch and forms an opening at the edge of the inner ring branch. The opening separates the connecting segments of the adjacent radial structures.

8. The dual-polarized antenna according to any one of claims 2-7, characterized in that, The connecting segment includes any one or a combination of arc-shaped, L-shaped, straight, wavy, and W-shaped shapes.

9. The dual-polarized antenna according to any one of claims 2-7, characterized in that, Each of the connecting segments includes a third segment and a fourth segment, and the first segment, the third segment, the fourth segment, and the second segment are connected in sequence. The connection point between the third segment and the fourth segment is the top of the outer edge of the connecting segment away from the center position.

10. The dual-polarized antenna according to claim 9, characterized in that, The number of the radiating structures is four and they are evenly distributed around the central position. The connection between the third segment and the fourth segment is the zero point of the current of the radiator in the first resonant state.

11. The dual-polarized antenna according to claim 9 or 10, characterized in that, The radiator can be excited to generate a second resonance, and the electrical lengths of the third segment and the fourth segment are both one-quarter of the wavelength corresponding to the resonant frequency of the second resonance.

12. The dual-polarized antenna according to any one of claims 1-11, characterized in that, The radiator can be excited to generate a second resonance, and the electrical length of the closed ring is M times the wavelength corresponding to the resonant frequency of the second resonance, where M is greater than or equal to 3 and less than or equal to 5.

13. The dual-polarized antenna according to claim 12, characterized in that, The resonant frequency of the first resonance is between 2.4 GHz and 2.5 GHz; or, the resonant frequency of the second resonance is between 5.15 GHz and 5.85 GHz.

14. The dual-polarized antenna according to any one of claims 1-11, characterized in that, The radiator can be excited to generate multiple resonant modes, including a second resonance and a third resonance, wherein the resonant frequency of the second resonance is higher than the resonant frequency of the first resonance, and the resonant frequency of the third resonance is higher than the resonant frequency of the second resonance.

15. The dual-polarized antenna according to claim 14, characterized in that, The dual-polarized antenna excites the radiator to produce the second resonance and the third resonance in the 5150MHz-7150MHz frequency band.

16. The dual-polarized antenna according to claim 14 or 15, characterized in that, The second resonance and the third resonance are higher-order resonance modes of the radiator, and the first resonance is the fundamental mode resonance mode of the radiator. The higher-order resonance modes and the fundamental mode resonance modes are approximately harmonic in relationship.

17. The dual-polarized antenna according to any one of claims 1-16, characterized in that, The dual-polarized antenna further includes a top plate, a bottom plate, and a vertical plate assembly. The top plate and the bottom plate are disposed opposite to each other, and the vertical plate assembly is connected between the top plate and the bottom plate. The radiator is located on the top plate. The vertical plate assembly and the bottom plate are used to set a first feed assembly and a second feed assembly. The first feed assembly is used to transmit radio frequency signals to the first feed point, and the first feed assembly is used to transmit radio frequency signals to the second feed point. The bottom plate is provided with a grounding layer, and the first grounding point and the second grounding point are electrically connected to the grounding layer through a grounding structure on the vertical plate assembly.

18. The dual-polarized antenna according to claim 17, characterized in that, The connection between the first end of any of the radiating structures and the second end of the adjacent radiating structures is an integral wire structure provided on the top plate. or, The first end of any one of the radiating structures and the second end of an adjacent radiating structure are two discontinuous wires disposed on the top plate, and the electrical connection between the first end and the second end is achieved by an electrical connection structure connected to the top plate.

19. The dual-polarized antenna according to claim 18, characterized in that, The upright plate assembly includes a first upright plate and a second upright plate, the first upright plate and the second upright plate intersect and are both connected between the top plate and the bottom plate; The first power supply component includes a first power supply port and a first power supply structure. The first power supply port is disposed on the base plate, and the first power supply structure is disposed on the first vertical plate. The first vertical plate is also provided with a first grounding structure. The first grounding structure is connected between the grounding layer and the first grounding point of the radiator. The first power supply structure is electrically connected between the first power supply point and the first power supply port. The second power supply component includes a second power supply port and a second power supply structure. The second power supply port is located on the base plate, and the second power supply structure is located on the second vertical plate. The second vertical plate is also provided with a second grounding structure. The second grounding structure is connected between the grounding layer and the second grounding point of the radiator. The second power supply structure is electrically connected between the second power supply point and the second power supply port.

20. The dual-polarized antenna according to claim 19, characterized in that, The first power supply component further includes a first power divider circuit, which is disposed on the base plate and electrically connected between the first power supply port and the first power supply structure. The second power supply component further includes a second power divider circuit, which is disposed on the base plate and electrically connected between the second power supply port and the second power supply structure. The number of radiators is at least two. The first power divider circuit is used to distribute the signal from the first power supply port to the first power supply point of each of the radiators. The second power divider circuit is used to distribute the signal from the second power supply port to the second power supply point of each of the radiators.

21. The dual-polarized antenna according to claim 19 or 20, characterized in that, The first power supply structure is a transmission line structure disposed on the first upright plate. The first power supply structure includes a first coupling section, and a capacitor is formed between the first coupling section and the portion of the radiator where the first power supply point is located; or, the second power supply structure is a transmission line structure disposed on the second upright plate. The second power supply structure includes a second coupling section, and a capacitor is formed between the second coupling section and the portion of the radiator where the second power supply point is located.

22. The dual-polarized antenna according to claim 21, characterized in that, The first upright plate includes a first insertion part, and the second upright plate includes a second insertion part. The first insertion part and the second insertion part are used to be inserted into the insertion hole of the top plate. The insertion hole of the top plate penetrates the radiation structure. The first grounding structure is a grounding layer structure provided on the first upright plate. The first grounding structure extends to the first insertion part and contacts the first grounding point. The second grounding structure is a grounding layer structure provided on the second upright plate. The second grounding structure extends to the second insertion part and contacts the second grounding point.

23. The dual-polarized antenna according to claim 22, characterized in that, The first grounding structure and the first power supply structure are respectively disposed on the front and back sides of the first upright plate, or the second grounding structure and the second power supply structure are respectively disposed on the front and back sides of the second upright plate.

24. A communication device, characterized in that, The device includes a motherboard, an RF chip, and a dual-polarized antenna as described in any one of claims 1-23, wherein the RF chip is disposed on the motherboard and is used to transmit RF signals to the dual-polarized antenna.

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