Antenna assembly and communication equipment

Abstract

The utility model provides an antenna assembly and communication equipment, and the antenna assembly comprises a circuit board and an antenna, the antenna is of an integrated structure, the antenna comprises two body parts and a regulation and control part, and the regulation and control part comprises a differential mode regulation and control part and a common mode regulation and control part; the two body parts are arranged at intervals along a first direction, the body parts are used for radiating or receiving electromagnetic waves, and the body parts are vertically arranged on the circuit board; the differential-mode regulation and control part is connected between the two body parts, one end of the common-mode regulation and control part is connected with the differential-mode regulation and control part, and the other end of the common-mode regulation and control part is connected with the circuit board. The antenna assembly obtains high isolation through the regulation and control part rather than the two body parts, so that the antenna assembly is more compact in structure, the space proportion of the antenna assembly in an application product is reduced, and layout of other types of parts and wiring arrangement in the product are facilitated. The antenna is of an integrally-formed structure and can be vertically arranged on the circuit board in a plug-in mode, and installation is more flexible.

Description

Technical Field

[0001] This application belongs to the technical field of antennas, and more specifically, relates to an antenna assembly and a communication device. Background Art

[0002] As a transducer, an antenna can transform the guided wave (electrical signal) transmitted on a transmission line into an electromagnetic wave propagating in free space or perform the opposite transformation. With the continuous upgrade and iteration of wireless communication technologies, the number of antennas in wireless products increases with each iteration. Arranging a preset number of antennas in a preset limited space will inevitably lead to stronger coupling between the antennas. The level of coupling directly affects the radiation performance and reception performance of the antennas for electromagnetic waves. Therefore, to ensure that wireless products have good performance, it is necessary to have a high isolation degree between the antennas therein to reduce or eliminate the coupling of the antennas.

[0003] As Figure 1 shown, an example of an existing isolation method for metal plug-in antennas is presented. In this isolation method, an isolation strip 20 is used to isolate between two metal plug-in antennas 10, and the isolation strip 20 and any adjacent metal plug-in antenna 10 are arranged at intervals. As Figure 2 shown, another example of an existing isolation method for metal plug-in antennas is presented. In this isolation method, two metal plug-in antennas 10 are set at a preset long distance to reduce the coupling between them.

[0004] As Figure 1 shown in the isolation method, when two metal plug-in antennas 10 and an isolation strip 20 are incorporated, there are 3 metal components in the wireless product. This not only results in high material costs but also large space occupation, which is not conducive to the layout of other various types and quantities of hardware in the product and the routing of wires therein. As Figure 2 shown in the isolation method, setting two metal plug-in antennas 10 at a long distance is difficult to achieve in a housing with limited dimensions, and the application scope of this isolation method is limited. Summary of the Utility Model

[0005] The purpose of the embodiments of this application is to provide an antenna assembly and a communication device to solve the technical problems of high material costs, large space occupation, and small applicable scope caused by the isolation methods adopted by the antennas in existing wireless products.

[0006] To achieve the above purpose, the technical solution adopted in this application is:

[0007] Provide an antenna assembly, the antenna assembly includes a circuit board and an antenna, the antenna is an integrally formed structure, the antenna includes two body parts and a regulation part, and the regulation part includes a differential-mode regulation part and a common-mode regulation part;

[0008] The two body parts are vertically arranged on the circuit board at intervals in the first direction, and the body parts are used for radiating or receiving electromagnetic waves; the differential-mode regulation part is connected between the two body parts, one end of the common-mode regulation part is connected to the differential-mode regulation part, and the other end is connected to the circuit board.

[0009] In some embodiments, the common-mode regulation part includes a longitudinally extending branch and a decoupling element that are electrically connected;

[0010] The longitudinally extending branch is connected to the differential-mode regulation part, and the decoupling element is arranged on the grounding part of the circuit board.

[0011] In some embodiments, the differential-mode regulation part extends linearly in the first direction, the longitudinally extending branch extends linearly in the second direction, and the first direction and the second direction are perpendicular.

[0012] In some embodiments, there are radio frequency traces and pads on the circuit board;

[0013] One end of the decoupling element is soldered to the grounding part, and the other end of the decoupling element is soldered to the radio frequency trace;

[0014] The radio frequency trace is electrically connected to the pad, and the longitudinally extending branch is plugged into the pad.

[0015] In some embodiments, the antenna is vertically arranged on the circuit board.

[0016] In some embodiments, the body part includes a first sheet part and a second sheet part that are connected at an angle;

[0017] The first sheet part is arranged parallel to the circuit board, the second sheet part is arranged perpendicular to the circuit board, and the differential-mode regulation part is connected between the two second sheet parts of the two body parts.

[0018] In some embodiments, the two body parts are symmetrically arranged on opposite sides of the differential-mode regulation part.

[0019] In some embodiments, there are two feeding ports on the circuit board;

[0020] The lower ends of the two second sheet parts extend beyond the differential-mode regulation part to form extending parts, and the two extending parts are electrically connected to the two feeding ports respectively.

[0021] In some embodiments, the decoupling element is a decoupling inductor or a decoupling capacitor.

[0022] The beneficial effects of the antenna assembly provided by the embodiments of the present application are as follows:

[0023] Compared with the prior art, the antenna component provided by the embodiment of the present application has an antenna with an integrally formed structure. The antenna includes two body parts and a regulation part, and the body parts can be used to radiate or receive electromagnetic waves. The differential-mode regulation part in the regulation part is connected between the two body parts, one end of the common-mode regulation part is connected to the differential-mode regulation part, and the other end is connected to the circuit board.

[0024] The antenna component provided by the embodiment of the present application has an integrally formed structure, which is beneficial to reducing the manufacturing cost and material cost. The antenna component obtains high isolation through the regulation part instead of separating the two body parts, so its structure is more compact. This not only reduces the space occupied by the antenna component in the application product, but also facilitates the layout of other types of components and the wiring arrangement in the product. The antenna has an integrally formed structure and can be erected on the circuit board by plugging, and its installation is more flexible.

[0025] Another object of the embodiment of the present application is also to provide a communication device, and the communication device includes the antenna component as described above.

[0026] The beneficial effects of the communication device provided by the embodiment of the present application compared with the prior art are the same as those of the antenna component provided by the embodiment of the present application compared with the prior art, and will not be elaborated here. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic diagram of an isolation method of an existing metal plug-in antenna;

[0029] Figure 2 It is a schematic diagram of another isolation method of an existing metal plug-in antenna;

[0030] Figure 3 It is a schematic diagram of the antenna component provided by the embodiment of the present application;

[0031] Figure 4 For Figure 3 The top view of the provided antenna component;

[0032] Figure 5 For Figure 3 The side view of the provided antenna component;

[0033] Figure 6 It is a schematic diagram of the current distribution of the antenna provided by the embodiment of the present application in the common-mode state after introducing the differential-mode regulation part;

[0034] Figure 7 Schematic diagram of current distribution in the differential mode after the differential mode regulation unit is introduced into the antenna provided by the embodiment of the present application;

[0035] Figure 8 Schematic diagram of the antenna provided by the embodiment of the present application introducing a common mode regulation unit and a decoupling capacitor or an inductive decoupler;

[0036] Figure 9 Schematic diagram of current distribution in the common mode after the common mode regulation unit and a decoupling capacitor or an inductive decoupler are introduced into the antenna provided by the embodiment of the present application;

[0037] Figure 10 Schematic diagram of current distribution in the differential mode after the common mode regulation unit and a decoupling capacitor or an inductive decoupler are introduced into the antenna provided by the embodiment of the present application;

[0038] Figure 11 Measured S-parameter curve graph obtained after debugging the antenna assembly provided by the embodiment of the present application through the debugging method provided by the embodiment of the present application;

[0039] Figure 12 Radiation pattern of theta = 75° obtained after debugging the antenna assembly provided by the embodiment of the present application through the debugging method provided by the embodiment of the present application.

[0040] Among them, each reference numeral in the figure:

[0041] 100, antenna assembly;

[0042] 101, circuit board; 102, antenna;

[0043] 1021, body part; 1022, regulation part;

[0044] 1011, first board; 1012, main board; 1013, second board; 1014, feed port structure;

[0045] 1011a, pad; 1012a, RF trace;

[0046] 1021a, first piece part; 1021b, second piece part;

[0047] 1022a, differential mode regulation part; 1022b, common mode regulation part;

[0048] a, longitudinal stub; b, decoupling element. Detailed implementation manners

[0049] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0050] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0051] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0052] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0053] Now, the antenna assembly 100 and the communication device provided by the embodiments of the present application will be described.

[0054] Please refer to Figures 3 to 10 As shown, the antenna assembly 100 provided by the embodiments of the present application includes a circuit board 101 and an antenna 102. The antenna 102 is an integrally formed structure. The antenna 102 includes two body parts 1021 and a regulation part 1022. The body parts 1021 are erected on the circuit board 101. The regulation part 1022 includes a differential-mode regulation part 1022a and a common-mode regulation part 1022b. The two body parts 1021 are arranged at intervals in a first direction. The body parts 1021 are used for radiating or receiving electromagnetic waves. The differential-mode regulation part 1022a is connected between the two body parts 1021. One end of the common-mode regulation part 1022b is connected to the differential-mode regulation part 1022a, and the other end of the common-mode regulation part 1022b is connected to the circuit board 101.

[0055] Among them, the antenna 102 refers to a conversion structure that can convert the guided wave propagating on the transmission line into an electromagnetic wave radiated in free space or perform the reverse conversion. The antenna 102 is electrically connected to the circuit board 101. A control circuit is provided on the circuit board 101. The antenna 102 can radiate electromagnetic waves into free space or receive electromagnetic waves from free space under the control of the circuit board 101.

[0056] Among them, the structure of the antenna 102 is not limited, including but not limited to: it can be formed by integrally connecting multiple thin sheets, or formed by integrally connecting multiple plates with a certain thickness, or formed by integrally connecting multiple rods. Generally, the material of the antenna 102 is a pure metal structure.

[0057] Integral molding refers to a process of constructing a predetermined shape through the deformation or extension of a material body, or leaving a predetermined shape by partially removing the material body, including but not limited to the extension of the same material or the sequential extension of different materials, including but not limited to the process of using a stamping machine to stamp a blank material to cause deformation and finally form a predetermined shape, or the process of using a forging tool to forge a blank material to cause deformation and finally form a predetermined shape, or the process of using a cutting device to partially remove the material of a blank material and leave a part with a predetermined shape, or the process of pouring a liquid material into a casting cavity adapted to the shape of the component and obtaining the component after cooling.

[0058] Among them, the process of pouring a liquid material into a casting cavity adapted to the shape of the component to obtain the component can be to obtain a complete component in one cavity, and one or more materials can be cast in the one cavity. Or it can be to obtain a part of the component in one cavity, move the part of the component to another cavity, and obtain another part of the component in the other cavity. By analogy, different parts of the complete component can be formed in different cavities in sequence, and the materials of different parts of the complete component can be the same or different.

[0059] The antenna assembly 100 provided in the embodiment of the present application is an integral molding structure, which is beneficial to reducing the manufacturing cost and material cost. The antenna assembly 100 obtains high isolation through the regulation part 1022 instead of pulling apart the two body parts 1021. Therefore, its structure is more compact, which not only reduces the space occupation ratio of the antenna assembly 100 in the application product, but also is beneficial to the layout of other types of components and the wiring setting in the product. The antenna 102 is an integral molding structure and can be erected on the circuit board 101 by means of plugging, and its installation is more flexible.

[0060] Among them, the isolation principle of the antenna assembly 100 provided in the embodiment of the present application is as follows:

[0061] When the antenna 102 is in the working process, in the common mode state, the potentials of the two ends of the differential mode regulation part 1022a and the two main body parts 1021 are respectively connected are equal, so there is no current distribution in the differential mode regulation part 1022a, and the introduction of the differential mode regulation part 1022a will not change the common mode impedance at this time; in the differential mode state, the potentials of the two ends of the differential mode regulation part 1022a and the two main body parts 1021 are respectively connected are not equal, so there is a stronger current distribution in the differential mode regulation part 1022a, and the introduction of the differential mode regulation part 1022a changes the differential mode impedance.

[0062] Among them, in the common mode state, the potentials of the two ends where the common mode regulation part 1022b is connected to the differential mode regulation part 1022a and the circuit board 101 are not equal, so there is a strong current distribution in the common mode regulation part 1022b. At this time, the introduction of the common mode regulation part 1022b will change the common mode impedance; in the differential mode state, the potentials of the two ends where the common mode regulation part 1022b is connected to the differential mode regulation part 1022a and the circuit board 101 are not equal. At this time, there is no current distribution in the common mode regulation part 1022b, so the introduction of the common mode regulation part 1022b will not change the differential mode impedance.

[0063] In the above, by introducing the differential mode control unit 1022a, the independent control of the differential mode is realized, and by introducing the common mode control unit 1022b, the independent control of the common mode is realized. The common mode and differential mode cancellation method is adopted to realize the independent control of the common mode and the differential mode, thereby realizing the high isolation setting between the different ports of the circuit board 101 feeding the antenna 102, and improving the working performance of the antenna 102.

[0064] In some embodiments, the common mode regulating portion 1022b is connected to the side of the differential mode regulating portion 1022a away from the main body portion 1021, and the end of the common mode regulating portion 1022b away from the differential mode regulating portion 1022a is plugged into the circuit board 101. In this way, the main body portion 1021, the differential mode regulating portion 1022a, the common mode regulating portion 1022b and the circuit board 101 can be arranged in sequence, which is more conducive to the layout between the various parts in the antenna 102, and the layout between the antenna 102 and the circuit board 101. The antenna 102 can be supported on the circuit board 101 in an upright state or an inclined state, and within the coverage range of the circuit board 101, the layout space of other components for electrical connection with the circuit board 101 can be avoided.

[0065] In some embodiments, the common mode regulating part 1022a includes a longitudinal branch a and a decoupling element b which are electrically connected, the longitudinal branch a is connected to the differential mode regulating part 1022b, and the decoupling element b is disposed on the grounding part of the circuit board 101. The decoupling element b is a decoupling inductor or a decoupling capacitor.

[0066] In some embodiments, Figure 6 and Figure 7As shown, by introducing the differential-mode regulation unit 1022a, independent regulation of the differential mode is achieved, and its regulation principle is explained by Figure 8 the common-mode (CM) current of the antenna 102 in Figure 9 and the distribution of the differential-mode (DM) current of the antenna 102 in

[0067] As Figure 6 shown, in the common-mode state, the potentials at both ends where the differential-mode regulation unit 1022a is respectively connected to the two body parts 1021 are equal. Therefore, there is no current distribution in the differential-mode regulation unit 1022a, and at this time, the introduction of the differential-mode regulation unit 1022a does not change the common-mode impedance. As Figure 7 shown, in the differential-mode state, the potentials at both ends where the differential-mode regulation unit 1022a is respectively connected to the two body parts 1021 are not equal. Therefore, there is a strong current distribution in the differential-mode regulation unit 1022a, and at this time, the introduction of the differential-mode regulation unit 1022a changes the differential-mode impedance.

[0068] In some embodiments, as Figure 8 shown, by introducing the common-mode regulation unit 1022b and decoupling capacitors or inductors, independent regulation of the common mode is achieved. As Figure 9 and Figure 10 shown, its regulation principle is explained by Figure 9 the common-mode (CM) current of the antenna 102 in Figure 10 and the distribution of the differential-mode (DM) current of the antenna 102 in

[0069] As Figure 9 shown, in the common-mode state, the potentials at both ends where the common-mode regulation unit 1022b is connected to the differential-mode regulation unit 1022a and the circuit board 101 are not equal. Therefore, there is a strong current distribution in the common-mode regulation unit 1022b, and at this time, the introduction of the common-mode regulation unit 1022b changes the common-mode impedance. As Figure 10 shown, in the differential-mode state, the potentials at both ends where the common-mode regulation unit 1022b is connected to the differential-mode regulation unit 1022a and the circuit board 101 are not equal. At this time, there is no current distribution in the common-mode regulation unit 1022b. Therefore, the introduction of the common-mode regulation unit 1022b does not change the differential-mode impedance.

[0070] Therefore, in this embodiment, by introducing the differential-mode regulation unit 1022a, independent regulation of the differential mode is achieved, and by introducing the common-mode regulation unit 1022b and decoupling capacitors or inductors, independent regulation of the common mode is achieved. Using the common-mode and differential-mode cancellation method, independent regulation of the common mode and differential mode is achieved, and further, high isolation is set between different ports through which the circuit board 101 feeds power to the antenna 102.

[0071] The debugging process of the antenna assembly 100 provided by the embodiments of the present application is as follows: First, by adjusting the matching of the feed port structure 1014, the differential-mode impedance is made to fall within a circle with a Voltage Standing Wave Ratio (VSWR) less than 2; by adjusting the ports of the decoupling capacitor or the decoupling inductor, the common-mode impedance and the differential-mode impedance are made to coincide or intersect, so that port matching and decoupling between ports can be achieved simultaneously. Decoupling the debugging of port matching and port decoupling can greatly simplify the debugging difficulty of the antenna 102.

[0072] Finally, after the debugging is completed, the measured S-parameter curve is as Figure 11 , the reflection coefficient at 2.4 - 2.5 GHz is less than -10 dB, and the isolation is 24 dB; the measured radiation pattern at theta = 75° is as Figure 12 shown, and it has good radiation characteristics.

[0073] In some embodiments, the differential-mode control part 1022a extends linearly along the first direction, and the longitudinal stub a extends linearly along the second direction, and the first direction and the second direction are perpendicular.

[0074] Specifically, the differential-mode control part 1022a has a length dimension when extending linearly along the first direction, the longitudinal stub a has a length dimension when extending along the second direction, and the differential-mode control part 1022a and the longitudinal stub a are perpendicularly connected.

[0075] The length directions of the differential-mode control part 1022a and the longitudinal stub a are perpendicular to each other, which is more conducive to the design and shaping of the overall structure of the antenna 102, reduces the design cost, and is also more conducive to the independent control of the common mode and the differential mode. Of course, in other embodiments, the differential-mode control part 1022a and the longitudinal stub a can also be connected at a certain inclination angle.

[0076] In some embodiments, a radio frequency trace 1012a and a pad 1011a are provided on the circuit board 101. One end of the decoupling element b is welded to the grounding part, and the other end of the decoupling element b is welded to the radio frequency trace 1012a. The radio frequency trace 1012a is electrically connected to the pad 1011a, and the longitudinal stub a is inserted into the pad 1011a.

[0077] Among them, the circuit board 101 includes a first board member 1011, a main board member 1012, and a second board member 1013 that are stacked. The pad 1011a is formed by removing the material on a part of the first board member 1011, the longitudinal stub a is inserted into the pad 1011a, and the radio frequency trace 1012a is provided on the main board member 1012.

[0078] Among them, both the first plate member 1011 and the second plate member 1013 are metal plate members. A plate member refers to a structure with a certain extended area and thickness and a relatively large ratio of the extended area to the thickness. A control circuit is provided on the main board member 1012, and the antenna 102 can radiate electromagnetic waves into free space or receive electromagnetic waves from free space under the control of the main board member 1012.

[0079] The antenna 102 provided in the embodiment of the present application belongs to a plug-in antenna, which can be directly plugged on the pad 1011a, and the impedance of the antenna 102 is adjusted through the design of the antenna 102 and the matching network on the RF trace 1012a.

[0080] In some embodiments, the body portion 1021 includes a first piece portion 1021a and a second piece portion 1021b that are angularly connected. The first piece portion 1021a is arranged parallel to the circuit board 101, and the second piece portion 1021b is arranged perpendicular to the circuit board 101. The differential mode control portion 1022a is connected between the two second piece portions 1021b of the two body portions 1021.

[0081] Among them, both the first piece portion 1021a and the second piece portion 1021b are sheet-like structures. A sheet-like structure refers to a structure with a certain extended area and thickness, and a relatively large ratio of its extended area to its thickness.

[0082] In some embodiments, the first piece portion 1021a and the second piece portion 1021b are perpendicularly connected, and the two form an L-shaped structure.

[0083] In other embodiments, the body portion 1021 can also be other bent structures, such as an I-shaped, H-shaped, C-shaped structure with a right angle, and so on.

[0084] In some embodiments, the two body portions 1021 are symmetrically arranged on opposite sides of the differential mode control portion 1022a, and their structures and sizes are exactly the same.

[0085] In other embodiments, the structures and / or sizes of the two body portions 1021 can be set differently according to specific requirements.

[0086] In some embodiments, two feeding port structures 1014 are provided on the circuit board 101. The lower ends of the two second piece portions 1021b exceed the differential mode control portion 1022a to form extending portions, and the two extending portions are electrically connected to the two feeding port structures 1014 respectively to achieve feeding respectively.

[0087] Another object of the embodiments of the present application is also to provide a communication device, which includes the antenna assembly 100 as described above. Among them, the communication device includes, but is not limited to, a ceiling-mounted AP or a router. The antenna assembly 100 and the communication device can operate in the 2G frequency band, and can also be migrated to the 5G frequency band or other frequency bands according to this design concept.

[0088] The beneficial effects of the communication device provided by the embodiments of the present application compared with the prior art are the same as those of the antenna assembly 100 provided by the embodiments of the present application compared with the prior art, and will not be elaborated here.

[0089] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An antenna assembly, characterized in that: The antenna assembly includes a circuit board and an antenna, the antenna is an integrated structure, the antenna includes two main body parts and a regulating part, and the regulating part includes a differential mode regulating part and a common mode regulating part; The two main bodies are arranged vertically on the circuit board at intervals along a first direction, and the main bodies are used to radiate or receive electromagnetic waves; the differential mode regulating part is connected between the two main bodies, and one end of the common mode regulating part is connected to the differential mode regulating part 、 The other end is connected to the circuit board.

2. The antenna assembly according to claim 1, wherein: The common mode regulating part includes electrically connected longitudinal branches and decoupling elements; The longitudinal branch is connected to the differential mode regulating portion, and the decoupling element is arranged on the grounding portion of the circuit board.

3. The antenna assembly according to claim 2, wherein: The differential mode regulating portion extends linearly along the first direction, and the longitudinal branches extend linearly along the second direction, and the first direction is perpendicular to the second direction.

4. The antenna assembly according to claim 3, wherein: The circuit board is provided with radio frequency traces and pads; One end of the decoupling element is welded to the ground portion, and the other end of the decoupling element is welded to the RF trace; The radio frequency wiring is electrically connected to the pad, and the longitudinal branch is plugged into the pad.

5. The antenna assembly according to any one of claims 1 to 4, characterized in that: The antenna is vertically arranged on the circuit board.

6. The antenna assembly according to claim 5, characterized in that: The main body portion includes a first sheet portion and a second sheet portion connected at an angle; The first sheet portion is arranged parallel to the circuit board, the second sheet portion is arranged perpendicular to the circuit board, and the differential mode regulating portion is connected between the two second sheet portions of the two main bodies.

7. The antenna assembly according to claim 6, wherein: The two main bodies are symmetrically arranged on opposite sides of the differential mode regulating portion.

8. The antenna assembly according to claim 6, wherein: The circuit board is provided with two feeding port structures; The lower ends of the two second pieces exceed the differential mode regulating portion to form a protruding portion, and the two protruding portions are electrically connected to the two feeding port structures respectively.

9. The antenna assembly according to claim 2, wherein: The decoupling element is a decoupling inductor or a decoupling capacitor.

10. A communication device, characterized in that: The communication device comprises the antenna assembly according to any one of claims 1-9.

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