Multi-band antenna and electronic device

Abstract

A multi-band antenna and an electronic device, which relate to the technical field of antennas. The multi-band antenna comprises a first radiation unit, a second radiation unit and a reflecting plate, wherein the first radiation unit and the second radiation unit operate in different bands. The first radiation unit comprises a first radiation sub-unit and a second radiation sub-unit connected by means of a first metalized via hole, wherein the first radiation sub-unit is located on a first plane, the second radiation sub-unit is located on a second plane, the second radiation unit is located on a third plane, the first plane, the second plane and the third plane are all parallel to the surface of the reflecting plate when horizontally arranged, and the first plane and the third plane are both above the second plane; and the second radiation sub-unit and the second radiation unit are both opposite a hollow area of the first radiation sub-unit. The second radiation sub-unit is provided with a second metallized via hole for connecting the second radiation sub-unit and the reflecting plate. On the basis of the structure, current transmission paths can be increased, thereby reducing the overall size of the multi-band antenna.

Description

A multi-frequency antenna and electronic device

[0001] This application claims priority to Chinese Patent Application No. 202411526962.0, filed on October 29, 2024, entitled "A Multi-Frequency Antenna and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of antenna technology, and more specifically, to a multi-frequency antenna and electronic device. Background Technology

[0003] In satellite communications, ionospheric delay is a major factor affecting satellite positioning. Differential processing using dual-frequency received signals can effectively reduce the ionospheric effect, thereby improving satellite positioning accuracy. In conclusion, multi-frequency antennas are of great significance in the practical application of satellite antennas.

[0004] However, existing multi-frequency antennas employ a coaxial arrangement of high-frequency and low-frequency radiating elements on the same layer to achieve dual-frequency radiation. This structure can result in a large overall size for the multi-frequency antenna, which is not conducive to layout. Therefore, reducing the overall size of multi-frequency antennas is a pressing technical problem that needs to be solved. Summary of the Invention

[0005] This application provides a multi-frequency antenna and electronic device that can reduce the overall size of the multi-frequency antenna.

[0006] In a first aspect, a multi-frequency antenna is provided, comprising: a first radiating element, a second radiating element, and a reflector, wherein the first and second radiating elements operate in different frequency bands. The first radiating element includes a first radiating sub-unit and a second radiating sub-unit, the first radiating sub-unit being located on a first plane, the second radiating sub-unit being located on a second plane, and the second radiating sub-unit being located on a third plane. The first, second, and third planes are all parallel to the surface of the reflector when it is horizontally positioned. The first and third planes are both above the second plane. The hollow regions of the second radiating sub-unit and the first radiating sub-unit are opposite each other. The first and second radiating sub-units are connected through a first metallized via. The second radiating sub-unit is provided with a second metallized via, which connects the second radiating sub-unit and the reflector.

[0007] In the above structure, the first radiating subunit and the second radiating subunit are stacked one on top of the other, and the second radiating unit and the second radiating subunit are stacked one on top of the other. This increases the current path and thus reduces the overall size of the multi-frequency antenna.

[0008] In some implementations of the first aspect, the multi-frequency antenna further includes: a guide plate medium and a support assembly. The surface of the guide plate medium is provided with a first guide plate and a second guide plate, the second guide plate being located within a hollow region of the first guide plate. The support assembly is connected to a reflector and supports the guide plate medium. This allows for an increase in the operating bandwidth of the multi-frequency antenna. Furthermore, the guide plate medium can be fixed and DC grounded through the support assembly.

[0009] In some implementations of the first aspect, the multi-frequency antenna further includes an adjustment structure connected to the support component, the adjustment structure being used to adjust the resonant interference of the support component on the multi-frequency antenna. This reduces the resonant interference of the support component on the multi-frequency antenna.

[0010] In some implementations of the first aspect, the support assembly includes a screw and a fixing structure disposed on the screw. The fixing structure is used to fix the guide plate medium, and the screw is used to connect the reflector and the guide plate medium. This provides support for the guide plate medium.

[0011] In some implementations of the first aspect, the fixing structure includes a metal disk. Thus, the screws and the metal disk effectively discharge current onto the dielectric substrate, preventing micro-discharge effects.

[0012] In some implementations of the first aspect, the adjustment structure includes at least one of the following: an inverted L-shaped structure or an arc-shaped structure.

[0013] In some implementations of the first aspect, the second radiating element is disposed within the hollow region of the first radiating sub-element, and the first plane is the same as the third plane. This allows the second radiating element and the first radiating sub-element to be deployed on the same plane. Furthermore, the second radiating element can be fed through the center of the multi-frequency antenna, achieving high isolation between the multi-frequency antennas.

[0014] In some implementations of the first aspect, the first radiating sub-unit, the second radiating sub-unit, and the second radiating unit are arranged concentrically and coaxially. This allows the first and second radiating units to possess rotational symmetry, eliminating the need for foolproof installation.

[0015] In some implementations of the first aspect, the second radiating element includes at least one slot and at least one pair of rectangular chamfers, and the first radiating sub-element includes at least one slot and at least one pair of rectangular chamfers. This allows for circular polarization.

[0016] In some implementations of the first aspect, the second radiating sub-unit is located within the projection of the hollow region of the first radiating sub-unit onto the second plane. This allows the second radiating sub-unit to function as both part of the first radiating unit and a reflector of the second radiating unit.

[0017] In some implementations of the first aspect, the first and second guide segments are arranged concentrically and coaxially. This allows guide segments 2061 and 2062 to have rotational symmetry characteristics, eliminating the need for foolproof structures during installation.

[0018] In a second aspect, an electronic device is provided, comprising the multi-frequency antenna described in the first aspect and any possible implementation thereof. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the structure of base station 100.

[0020] Figure 2 is a schematic diagram of one structure of the multi-frequency antenna 200.

[0021] Figure 3 is a schematic diagram of the deployment relationship between plane 1, plane 2, plane 3 and reflector 203.

[0022] Figure 4 is a schematic diagram of the hollow region of the radiating subunit 2011.

[0023] Figure 5 is another structural schematic diagram of the multi-frequency antenna 200.

[0024] Figure 6 is a schematic block diagram of an electronic device. Detailed Implementation

[0025] 1. Unless otherwise stated, “multiple” means two or more.

[0026] 2. Unless otherwise specified or in case of logical conflict, the terms and / or descriptions in different embodiments of this application are consistent and can be referenced in each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0027] III. The various numerical designations used in this application are merely for descriptive convenience and are not intended to limit the scope of protection of this application. The magnitude of the serial numbers used in this application does not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic. For example, the terms "first," "second," "third," "fourth," and other various terminology (if present) in the specification, claims, and drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0028] Furthermore, any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner for ease of understanding.

[0029] IV. The terms “comprising” and “having” and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are expressly listed, but may include other steps or units that are not expressly listed or that are inherent to such process, product or device.

[0030] The multi-band antenna and electronic devices of this application can be applied to various communication systems, including but not limited to: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, 5th Generation (5G) systems or New Radio (NR) systems, Device to Device (D2D) systems, Vehicle to Everything (V2X) systems, and future communication networks, etc.

[0031] First, a brief introduction to the terminology used in the embodiments of this application will be given.

[0032] 1. Antenna

[0033] An antenna may include one or more of the following: radiating elements (the number of radiating elements is not limited), a reflector (or base plate, antenna panel), a feed network (or power distribution network), a phase shifter, and a radome. Among these, the antenna element can constitute the radiating element of the antenna. The antenna element, often simply referred to as a vibrator, serves to guide and amplify electromagnetic waves.

[0034] A feed network provides power, which in turn supplies electricity. In the antenna field, feeding can refer to supplying power to the antenna or providing energy. The function of the feed network is to feed signals to the various radiating elements of the antenna with a certain amplitude and phase, or to feed signals received from the various radiating elements to the signal processing unit of the base station with a certain amplitude and phase. A feed network typically consists of controlled impedance transmission lines.

[0035] 2. Base station

[0036] A base station is a device used to communicate with terminal equipment, including but not limited to: base transceiver stations (BTS) in the Global System for Mobile Communications (GSM) system, BTS in code division multiple access (CDMA) system, Node B (NB) in the wideband code division multiple access (WCDMA) system, evolved Node B (eNB or eNodeB) in the LTE system, radio controllers, relay stations, access points, vehicle-mounted equipment, wearable devices, and base stations in 5G and future communication networks, etc., without limitation.

[0037] A base station can be a device used to communicate with terminal equipment, including a base transceiver station (BTS) in a GSM or CDMA system, a Node B (NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, a radio controller in a cloud radio access network (CRAN) scenario, or a relay station, access point, vehicle-mounted equipment, wearable device, base station in a 5G network, or a base station in a future communication network, etc., and is not limited thereto.

[0038] A base station, also known as an access network device or access node, can be located in a base station subsystem (BBS), a UMTS terrestrial radio access network (UTRAN), or an evolved universal terrestrial radio access network (E-UTRAN). It is used to provide cell coverage for wireless signals to enable communication between terminal devices and the wireless network.

[0039] Specifically, a base station can be a base transceiver station (BTS) in a GSM or CDMA system, a node B (NB) in a wideband code division multiple access (WCDMA) system, an evolved Node B (eNB or eNodeB) in an LTE system, a transmission reception point (TRP), a next-generation Node B (gNB) in a 5G mobile communication system, a next-generation base station in a future communication network, an access network device or module of an access network device in an open RAN (ORAN) system, a base station in a future mobile communication system, or an access node in a wireless fidelity (Wi-Fi) system, etc.

[0040] Base stations can also be the centralized unit (CU), distributed unit (DU), CU-control plane (CP), CU-user plane (UP), or radio unit (RU) as described below. In the ORAN system, CU can also be called O-CU, DU can be called open (O)-DU, CU-CP can be called O-CU-CP, CU-UP can be called O-CUP-UP, and RU can be called O-RU.

[0041] The base station in this application can be a macro base station, micro base station, or indoor station, a relay node or donor node, or a wireless controller in a cloud radio access network (CRAN) scenario. Alternatively, the base station can also be a server, vehicle-mounted equipment, wearable devices, or a g node (gNodeB or gNB) in a new radio (NR) system, or an access network device in a future evolved network. For example, the base station in V2X technology can be a roadside unit (RSU), and this application does not specifically limit this.

[0042] Figure 1 is a structural schematic diagram of base station 100. As shown in Figure 1, base station 100 includes: antenna system 01, antenna adjustment bracket 02, mounting bracket 03, cable 04, radio frequency processing unit 05, baseband processing unit 06, connector seal 07, and grounding device 08.

[0043] In practical applications, the pole 04, antenna adjustment and mounting bracket 05, and other equipment can be provided by the site provider. The antenna 01, radio frequency processing unit 06, and baseband processing unit 20 in the base station 100 can be provided by the base station manufacturer. The base station 100 in this embodiment may also exclude the antenna adjustment and mounting bracket 05; it only needs to include a bracket capable of mounting the antenna to the pole, and this bracket may not have an adjustment function.

[0044] Specifically, the antenna system 01 is mounted on the mounting bracket 03 via the antenna adjustment bracket 02 to facilitate the reception or transmission of signals by the antenna system 01. For example, the mounting bracket 03 can be a pole. In one possible implementation, the antenna system 01 can be directly mounted on the mounting bracket 03.

[0045] The antenna system 01 may include a radome 12. The radome 12 typically houses various components, such as a radiator 11 and a floor (not shown). The radome 12 possesses excellent electromagnetic wave penetration characteristics in terms of electrical performance and can withstand the effects of harsh external environments in terms of mechanical performance, thus protecting the components inside the radome 12 from external environmental influences.

[0046] The components located inside the radome 12 in the antenna system 01 can be connected to the radio frequency (RF) processing unit 05 via cable 04. The baseband processing unit 06 can be connected to the components located inside the radome 12 in the antenna system 01 via the RF processing unit 05. Thus, the RF processing unit 05 can perform frequency selection, amplification, and down-conversion processing on the signal received by the antenna system 01, converting it into an intermediate frequency (IF) signal or a baseband signal and sending it to the baseband processing unit 06; alternatively, the RF processing unit 05 can up-convert and amplify the baseband processing unit 06 or the IF signal, converting it into electromagnetic waves through the antenna system 01 and transmitting it.

[0047] In one possible implementation, the radio frequency processing unit 05 can also be called a remote radio unit (RRU), and the baseband processing unit 06 can also be called a baseband unit (BBU).

[0048] The radio frequency (RF) processing unit 05 can be integrated with the antenna system 01, and the baseband processing unit 06 is located at the far end of the antenna system 01. In this case, the RF processing unit 05 and the antenna system 01 can be collectively referred to as an active antenna unit (AAU). Figure 1 is merely an example of the positional relationship between the RF processing unit 05 and the antenna system 01. Alternatively, the RF processing unit 05 and the baseband processing unit 06 can also be located simultaneously at the far end of the antenna system 01.

[0049] Grounding device 07 is installed on feeder 05. Grounding device 07 can perform functions such as electrical grounding, lightning protection, overvoltage protection, and maintenance of equipment performance, which helps to ensure the stability and safety of base station 1.

[0050] The connector seal 08 is provided at the connection between the antenna radome and the cable 04 of the antenna system 01 and the connection between the grounding device 08 and the cable 04 to provide insulation and sealing. The connector seal 08 can be at least one of insulating sealing tape or polyvinyl chloride (PVC) insulating adhesive. Of course, the connector seal 08 can also have other structures and is not limited to the form of tape.

[0051] Currently, the antenna of antenna system 01 can be a multi-frequency antenna. When the multi-frequency antenna uses a coaxial arrangement of high-frequency and low-frequency radiating elements on the same layer with the low-frequency radiating element grounded to achieve dual-frequency radiation, this structure shortens the current path. To ensure sufficient current path, this requires the multi-frequency antenna to have a larger overall size, which affects the layout of the multi-frequency antenna. In view of this, this application provides a multi-frequency antenna and electronic device that can support a reduction in the overall size of the multi-frequency antenna. See Figure 2 for a detailed description.

[0052] Figure 2 is a schematic diagram of one structure of the multi-frequency antenna 200. As shown in Figure 2, the multi-frequency antenna 200 includes: a radiating element 201, a radiating element 202, and a reflector 203. The radiating elements 201 and 202 operate in different frequency bands. For example, the radiating element 201 operates at a low frequency (or, the radiating element 201 can be a low-frequency radiating element), and the radiating element 202 operates at a high frequency (or, the radiating element 202 can be a high-frequency radiating element). Furthermore, this application does not limit the shape of the radiating elements 201 and 202. For example, the radiating element 201 can be a square radiating element or a ring radiating element, and the radiating element 202 can be a square radiating element or a circular radiating element.

[0053] The radiating unit 201 includes radiating subunits 2011 and 2012 connected by a metallized via 204; in other words, radiating subunits 2011 and 2012 are arranged in a stepped configuration. The radiating subunit 2012 is provided with a metallized via 205 (a hole can be formed inside the radiating subunit 2012 for providing the metallized via 205), which connects the radiating subunit 2012 and the reflector 203. The metallized via 205 can also allow the passage of a feed probe 1, which feeds the radiating unit 202. Additionally, the radiating subunit 2011 can also be provided with a metallized via for the passage of a feed probe 2, which feeds the radiating unit 201.

[0054] Radiation subunit 2011 is located on plane 1, radiation subunit 2012 is located on plane 2, and radiation unit 202 is located on plane 3. Planes 1, 2, and 3 are all parallel to the surface of the reflector 203 when it is horizontally set. Planes 1 and 3 are both above plane 2 (Figure 2 takes the example of plane 3 being above plane 1).

[0055] Figure 3 is a schematic diagram showing the deployment relationship between plane 1, plane 2, plane 3, and reflector 203. Example:

[0056] As shown in Figure 3(a), the reflector 203 is horizontally arranged, and from top to bottom, they are: plane 3, plane 1, plane 2 and reflector 203.

[0057] As shown in Figure 3(b), the reflector 203 is horizontally arranged, and from top to bottom, the following planes are arranged: plane 1, plane 3, plane 2, and reflector 203. Planes 1 and 3 are identical, or planes 1 and 3 are on the same plane.

[0058] As shown in Figure 3(c), the reflector 203 is horizontally arranged, and from top to bottom, they are: plane 1, plane 3, plane 2 and reflector 203.

[0059] In summary, the embodiments of this application do not limit the deployment relationship between plane 3 and plane 1.

[0060] In the multi-frequency antenna 200, the radiating sub-element 2011 includes a hollow region, which can be circular, square, or otherwise, without limitation. The radiating element 202 is opposite to the hollow region of the radiating sub-element 2011, or the radiating element 202 is located above or below the hollow region of the radiating sub-element 2011, depending on the deployment relationship between plane 1 and plane 3. Additionally, the radiating sub-element 2012 is opposite to the hollow region of the radiating sub-element 2011, or the radiating sub-element 2012 is located below the hollow region of the radiating sub-element 2011. A description of the hollow region of the radiating sub-element 2011 can be found in Figure 4.

[0061] Figure 4 is a schematic diagram of the hollow region of the radiating subunit 2011. Example:

[0062] As shown in Figure 4(a), the hollow region of the radiating subunit 2011 is a circular region, or, in another possible example, the shape of the radiating subunit 2011 is annular. When plane 3 is above plane 1, radiating subunit 2 is above the hollow region of the radiating subunit 2011, and radiating subunit 2012 is below the hollow region of the radiating subunit 2011. When plane 3 is below plane 1, radiating subunit 202 is below the hollow region of the radiating subunit 2011, and radiating subunit 2012 is below the hollow region of the radiating subunit 2011.

[0063] As shown in Figure 4(b), the hollow region of the radiating subunit 2011 is a square region. The overall shape of the radiating subunit 201 can be square or circular, and there is no limitation on this.

[0064] In summary, by deploying the radiating sub-units 2011, 2012, and 202 in a stacked manner, the current path can be increased, thereby reducing the overall size of the multi-frequency antenna 200.

[0065] One possible implementation is that the radiating element 202 is located within the hollow region of the radiating sub-element 2011. Plane 1 is identical to plane 3. This allows the radiating element 202 and the radiating sub-element 2011 to be deployed on the same plane. Furthermore, the radiating element 202 can be fed through the center of the multi-frequency antenna 200, achieving high isolation between the multi-frequency antennas.

[0066] One possible implementation is that the radiating sub-unit 2012 is located within the projection of the hollow region of the radiating sub-unit 2011 onto plane 2. In this way, the radiating sub-unit 2012 can function as part of the radiating unit 201 while also acting as a reflector (or reflective ground) for the radiating unit 202.

[0067] One possible implementation is that the radiating unit 202, radiating subunit 2011, and radiating subunit 2012 are arranged concentrically and coaxially. This allows the radiating unit 201 and radiating unit 202 to have rotational symmetry characteristics, eliminating the need for foolproof installation.

[0068] In one possible implementation, the radiating element 202 includes at least one slot and at least one pair of rectangular chamfers, and the radiating sub-element 2011 includes at least one slot and at least one pair of rectangular chamfers. The shape of the slot can be U-shaped, C-shaped, or arc-shaped, etc., and is not limited thereto. This structure enables circular polarization.

[0069] Figure 5 is a schematic diagram of another structure of the multi-frequency antenna 200. As shown in Figure 5, the multi-frequency antenna 200 also includes a guide plate medium 206 and a support assembly 207. Guide plates 2061 and 2062 are disposed on the surface of the guide plate medium 206. The guide plate 2062 is located within the hollow region of the guide plate 2061. The support assembly 207 is connected to the reflector 203 and is used to support the guide plate medium 206. The hollow region of the guide plate 2061 can be circular or square, and is not limited thereto. Furthermore, the guide plate 2061 corresponds to the radiating element 202, and the guide plate 2062 corresponds to the radiating element 201. By introducing the guide plates, the operating bandwidth of the multi-frequency antenna 200 can be increased.

[0070] One possible implementation is that the guide pieces 2061 and 2062 are arranged concentrically. This allows the guide pieces 2061 and 2062 to have rotational symmetry characteristics, eliminating the need for foolproof structures during installation.

[0071] In one possible implementation, the support assembly 207 includes a screw 2071 and a fixing structure 2072 (see Figure 5). The fixing structure 2072 is disposed on the screw 2071 and is used to fix the guide plate medium 206. The screw 2071 is used to connect the reflector 203 and the guide plate medium 206. In this way, the support function of the guide plate medium can be achieved.

[0072] One possible implementation is that the fixing structure 2072 includes a metal disk. Thus, the screws and the metal disk effectively discharge the current onto the dielectric substrate, preventing micro-discharge effects.

[0073] In one possible implementation, the multi-frequency antenna 200 also includes an adjustment structure 208 (see Figure 5), which is connected to the support component 207. The adjustment structure 208 is used to adjust the resonant interference of the support component 207 on the multi-frequency antenna 200. In this way, the resonant interference of the support component on the multi-frequency antenna can be reduced.

[0074] One possible implementation is that the adjustment structure 208 includes at least one of the following: an inverted L-shaped structure or an arc-shaped structure. Based on the above structure, this can reduce the deteriorating effect of the screw on the radiation pattern of the multi-frequency antenna.

[0075] Figures 2 to 5 illustrate the structural schematic diagram of the multi-frequency antenna 200. The electronic device of the present application embodiment is described below with reference to Figure 6.

[0076] Figure 6 is a schematic block diagram of an electronic device. The electronic device shown in Figure 6 can be a base station or radar, etc. As shown in Figure 6, the electronic device includes a multi-frequency antenna 200 and a radio frequency (RF) module 300, which are connected together. The RF module 300 converts the baseband signal into a high-frequency current and transmits the signal as electromagnetic waves through the radiating element of the multi-frequency antenna 200. Additionally, the RF module 300 can also convert the high-frequency current transmitted from the radiating element in the multi-frequency antenna 200 (the radiating element converts the received electromagnetic wave signal into a high-frequency current signal) into a baseband signal.

[0077] Those skilled in the art will recognize that the units of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0078] In the embodiments provided in this application, it should be understood that the disclosed electronic devices and apparatuses can be implemented in other ways. For example, the base station apparatus embodiments described above are merely illustrative. For instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0079] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0080] In addition, the functional modules in the embodiments of this application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one module.

[0081] 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 multi-frequency antenna, characterized in that, include: A first radiating element, a second radiating element, and a reflector; the first radiating element and the second radiating element operate in different frequency bands. The first radiating unit includes a first radiating subunit and a second radiating subunit. The first radiating subunit is located on a first plane, the second radiating subunit is located on a second plane, and the second radiating subunit is located on a third plane. The first plane, the second plane, and the third plane are all parallel to the surface of the reflector when it is horizontally set. The first plane and the third plane are both above the second plane. The hollow area of ​​the second radiating subunit is opposite to the hollow area of ​​the first radiating subunit. The first radiating subunit and the second radiating subunit are connected through a first metallized via; The second radiating subunit is provided with a second metallized via, which connects the second radiating subunit and the reflector.

2. The multi-frequency antenna according to claim 1, characterized in that, The multi-frequency antenna also includes: The guide plate medium and the support assembly are provided. The surface of the guide plate medium is provided with a first guide plate and a second guide plate. The second guide plate is located within the hollow area of ​​the first guide plate. The support assembly is connected to the reflector and is used to support the guide plate medium.

3. The multi-frequency antenna according to claim 2, characterized in that, The multi-frequency antenna also includes: An adjustment structure is provided, which is connected to the support assembly, and is used to adjust the resonant interference of the support assembly on the multi-frequency antenna.

4. The multi-frequency antenna according to claim 3, characterized in that, The support assembly includes screws and a fixing structure. The fixing structure is disposed on the screws and is used to fix the guide plate medium. The screws are used to connect the reflector plate and the guide plate medium.

5. The multi-frequency antenna according to claim 4, characterized in that, The fixing structure includes a metal disk.

6. The multi-frequency antenna according to any one of claims 3 to 5, characterized in that, The adjustment structure includes at least one of the following: Inverted L-shaped structure or arc-shaped structure.

7. The multi-frequency antenna according to any one of claims 1 to 6, characterized in that, The second radiating element is disposed within the hollow region of the first radiating sub-unit, and the first plane is the same as the third plane.

8. The multi-frequency antenna according to any one of claims 1 to 7, characterized in that, The first radiating subunit, the second radiating subunit, and the second radiating unit are arranged in a concentric and coaxial manner.

9. The multi-frequency antenna according to any one of claims 1 to 8, characterized in that, The second radiating unit includes at least one slot and at least one pair of rectangular chamfers, and the first radiating subunit includes at least one slot and at least one pair of rectangular chamfers.

10. The multi-frequency antenna according to any one of claims 1 to 9, characterized in that, The second radiating subunit is located within the projection of the hollow region of the first radiating subunit onto the second plane.

11. The multi-frequency antenna according to any one of claims 2 to 10, characterized in that, The first guide piece and the second guide piece are arranged concentrically and coaxially.

12. An electronic device, characterized in that, The electronic device includes the multi-frequency antenna according to any one of claims 1 to 11.

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