Antenna modules and electronic equipment

Abstract

The present application provides an antenna module and an electronic device, including a radiator, a first feeding system, a first bandpass circuit and a second feeding system. The radiator includes a first radiator and a second radiator. A coupling gap is provided between the first radiator and the second radiator. The first grounding end of the first radiator and the second grounding end of the second radiator are both electrically connected to a reference ground. The first feeding system is electrically connected to a first feeding point of the first radiator, and is used to excite the radiator to receive and transmit electromagnetic wave signals in a first frequency band. The second feeding system is electrically connected to a second feeding point of the second radiator, and is used to excite the radiator to receive and transmit electromagnetic wave signals in a second frequency band, wherein the minimum frequency of the second frequency band is greater than the maximum frequency of the first frequency band. The first bandpass circuit is electrically connected between the first connection point of the first radiator and the reference ground, and is used to conduct electromagnetic wave signals in a third frequency band to the reference ground. The antenna module and the electronic device provided by the present application can improve the coverage rate of electromagnetic wave signals.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an antenna module and an electronic device. Background Art

[0002] With the development of communication technology, electronic devices with communication functions are becoming more and more popular, and the requirements for Internet access speed are getting higher and higher. Therefore, how to improve the coverage of electromagnetic wave signals has become a technical problem that needs to be solved. Summary of the invention

[0003] The present application provides an antenna module and an electronic device for improving the coverage of electromagnetic wave signals.

[0004] In a first aspect, the present application provides an antenna module, comprising:

[0005] A radiator, comprising a first radiator and a second radiator, wherein the first radiator has a first grounding end, a first coupling end, a first feeding point and a first connection point located between the first grounding end and the first coupling end, wherein the first connection point is located between the first feeding point and the first coupling end, and the second radiator has a second coupling end, a second grounding end and a second feeding point located between the second coupling end and the second grounding end, wherein a coupling gap is provided between the first coupling end and the second coupling end, and both the first grounding end and the second grounding end are electrically connected to a reference ground;

[0006] A first feeding system, electrically connected to the first feeding point, for exciting the radiator to transmit and receive electromagnetic wave signals in a first frequency band;

[0007] a second feeding system, electrically connected to the second feeding point, and used to excite the radiator to transmit and receive electromagnetic wave signals in a second frequency band, wherein the minimum frequency of the second frequency band is greater than the maximum frequency of the first frequency band; and

[0008] A first bandpass circuit is electrically connected between the first connection point and the reference ground, and the first bandpass circuit is used to conduct electromagnetic wave signals in a third frequency band to the reference ground, wherein the third frequency band is within the range of the second frequency band, so that the second feeding system excites the radiator to support at least two resonance modes in the third frequency band.

[0009] In a second aspect, the present application provides an electronic device, comprising the antenna module.

[0010] The antenna module and electronic device provided in the present application realize multiplexing of the first radiator by the first feeding system and the second feeding system by setting capacitive coupling between the first radiator and the second radiator, wherein the first feeding system and the second feeding system respectively transmit and receive electromagnetic wave signals of the first frequency band and the second frequency band, and by setting a first bandpass circuit, the first bandpass circuit is used to conduct the electromagnetic wave signal of the third frequency band in the second frequency band to the reference ground, so that the second feeding system adds at least one resonance mode in the third frequency band, and the second feeding system has at least two resonance modes in the third frequency band, thereby performing broadband coverage of the third frequency band and promoting full-frequency coverage in the second frequency band, and also improves the spatial multiplexing rate of the antenna through the common aperture technology of multiple different feeding systems, and can reduce the number and size of radiators as much as possible, which is conducive to integration into electronic equipment with extremely limited space, and at the same time, in the process of multiplexing the first radiator and the second radiator by the first feeding system and the second feeding system, multi-mode simultaneous operation is realized, and the bandwidth of the antenna is widened, thereby improving the coverage rate of the electromagnetic wave signal by the antenna module. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 is a structural schematic diagram of an electronic device provided in the first embodiment of the present application;

[0013] Figure 2 yes Figure 1 A partially exploded schematic diagram of an electronic device is shown;

[0014] Figure 3 is a schematic diagram of an equivalent circuit of the antenna module provided in the first embodiment of the present application;

[0015] Figure 4 yes Figure 3 The structural schematic diagram of the first first bandpass circuit shown;

[0016] Figure 5 yes Figure 3 The structural schematic diagram of the second first bandpass circuit shown;

[0017] Figure 6 yes Figure 3 A schematic diagram of a first structure of an antenna module provided with a second bandpass circuit is shown;

[0018] Figure 7 yes Figure 3A second structural schematic diagram of an antenna module provided with a second bandpass circuit is shown;

[0019] Figure 8 yes Figure 6 and Figure 7 A schematic structural diagram of a second bandpass circuit shown;

[0020] Fig. 9 3 is a schematic diagram of an equivalent circuit for receiving and transmitting electromagnetic wave signals in a first frequency band by a first feeding system in the antenna module;

[0021] Fig.10 yes Fig. 9 An S parameter curve diagram of the first feeding system receiving and transmitting an electromagnetic wave signal in a first frequency band;

[0022] Fig.11 yes Figure 3 The first radiator of the antenna module shown is provided with an equivalent circuit diagram of a first adjustment circuit;

[0023] Fig.12 yes Fig.11 A schematic structural diagram of the first regulating circuit shown;

[0024] Fig.13 yes Figure 3 The antenna module shown is provided with a first adjustment circuit and a second bandpass circuit;

[0025] Fig.14 yes Figure 3 A schematic structural diagram of a first matching circuit in the antenna module shown;

[0026] Fig.15 is a schematic structural diagram of a first regulating circuit provided in an embodiment of the present application as a series branch of a first matching circuit;

[0027] Fig.16 yes Fig.11 The first regulating circuit adjusts the S parameter curve of the electromagnetic wave signal in the first frequency band;

[0028] Fig.17 is a structural schematic diagram of a first filter circuit provided in an embodiment of the present application;

[0029] Fig.18 is a structural schematic diagram of a second filter circuit provided in an embodiment of the present application;

[0030] Fig.19 is a structural schematic diagram of a third filter circuit provided in an embodiment of the present application;

[0031] Fig. 20 is a structural schematic diagram of a fourth filter circuit provided in an embodiment of the present application;

[0032] Fig.21 is a structural schematic diagram of a fifth filter circuit provided in an embodiment of the present application;

[0033] Fig. 22 is a structural schematic diagram of a sixth filter circuit provided in an embodiment of the present application;

[0034] Fig.23 is a structural schematic diagram of a seventh filter circuit provided in an embodiment of the present application;

[0035] Fig.24 is a structural schematic diagram of an eighth filter circuit provided in an embodiment of the present application;

[0036] Fig.25 yes Figure 3 An equivalent circuit diagram of the second feeding system in the antenna module shown to transmit and receive electromagnetic wave signals in the second frequency band;

[0037] Fig.26 yes Fig.25 The S parameter curve diagram of the second feeding system receiving and transmitting electromagnetic wave signals in the second frequency band;

[0038] Fig. 27 yes Figure 3 The S parameter curve diagram of the antenna module for receiving and transmitting electromagnetic wave signals in the first frequency band and the second frequency band;

[0039] Fig.28 is a curve diagram of the isolation between the first signal source and the second signal source provided in the first embodiment of the present application;

[0040] Fig.29 is an efficiency curve diagram of the embodiment of the present application without the first band-pass circuit and with the first band-pass circuit;

[0041] Fig.30 yes Figure 3 A schematic diagram of the circuit structure of the second matching network shown;

[0042] Fig.31 is a schematic diagram of an equivalent circuit of an antenna module provided in the second embodiment of the present application;

[0043] Fig.32 yes Fig.31 The antenna module shown is provided with a third matching circuit.

[0044] Fig.33 yes Fig.32 A schematic diagram of an equivalent circuit for receiving and transmitting electromagnetic wave signals in a second frequency band by a second feeding system in the antenna module shown;

[0045] Fig.34 yes Fig.33An S parameter curve diagram of the second feeding system in the antenna module receiving and transmitting an electromagnetic wave signal in a second frequency band;

[0046] Fig.35 yes Fig.33 A circuit diagram of the first second matching circuit and the third matching circuit shown;

[0047] Fig.36 yes Fig.33 A circuit diagram of the second matching circuit and the third matching circuit shown;

[0048] Fig.37 yes Fig.33 A circuit diagram of a third second matching circuit and a third matching circuit shown;

[0049] Fig.38 is an efficiency curve diagram of an embodiment of the present application in which a third radiator is not provided and a third radiator is provided;

[0050] Fig.39 It is a structural schematic diagram of a first radiator, a second radiator, and a third radiator provided in an electronic device according to an embodiment of the present application.

[0051] Description of the accompanying drawings: electronic device 1000; antenna module 100; display screen 200; housing 300; frame 310; back cover 320; middle plate 330; middle frame 340; radiator 10; first feeding system 20; second feeding system 30; third feeding system 40; first radiator 11; second radiator 12; third radiator 13; first ground terminal 111; first coupling terminal 112; first feeding point A1; second feeding point A2; second coupling terminal 121; second ground terminal 122; coupling gap 113; reference ground GN D; first matching circuit M1; first signal source 21; second matching circuit M2; second signal source 31; third matching circuit M3; first unit 101; second unit 102; first regulating circuit T1; first connection point B1; second connection point B2; first regulating point B3; single-pole double-throw switch 51; first lumped element 52; second lumped element 53; four switches (SW1-SW4); regulating branch (P1-P4); first tuning circuit 22; second bandpass circuit 23; first bandpass circuit 41; second regulating circuit T2;

[0052] The first resonance mode a; the second resonance mode b; the third resonance mode c; the fourth resonance mode d; the fifth resonance mode j;

[0053] a first capacitor C1; a second capacitor C2; a third capacitor C3; a fourth capacitor C4; a fifth capacitor C5; a sixth capacitor C6; a seventh capacitor C7; an eighth capacitor C8; a ninth capacitor C9; a tenth capacitor C10; an eleventh capacitor C11; a twelfth capacitor C12; and a thirteenth capacitor C13;

[0054] The first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, the fifth inductor L5, the sixth inductor L6, the seventh inductor L7, the eighth inductor L8, the ninth inductor L9 and the tenth inductor L10. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. In addition, the reference to "embodiment" or "implementation method" in this article means that the specific features, structures or characteristics described in conjunction with the embodiments or implementation methods may be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] Please refer to Figure 1 , Figure 1 The present invention provides a schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present invention. The electronic device 1000 includes an antenna module 100. The antenna module 100 is used to send and receive electromagnetic wave signals to achieve the communication function of the electronic device 1000. The present invention does not specifically limit the position of the antenna module 100 on the electronic device 1000. Figure 1 The electronic device 1000 further includes a display screen 200 and a housing 300 that cover and connect each other. The antenna module 100 may be disposed inside the housing 300 of the electronic device 1000, or partially integrated with the housing 300, or partially disposed outside the housing 300. Figure 1 The radiator of the antenna module 100 is integrated with the housing 300. Of course, the antenna module 100 can also be arranged on the retractable component of the electronic device 1000. In other words, at least part of the antenna module 100 can also be extended out of the electronic device 1000 along with the retractable component of the electronic device 1000, and retracted into the electronic device 1000 along with the retractable component; or, the overall length of the antenna module 100 is extended along with the extension of the retractable component of the electronic device 1000.

[0057] The electronic device 1000 includes but is not limited to a telephone, a television, a tablet computer, a mobile phone, a camera, a personal computer, a laptop computer, a vehicle-mounted device, a headset, a watch, a wearable device, a base station, a vehicle-mounted radar, a customer premise equipment (Customer Premise Equipment, CPE), and other devices capable of transmitting and receiving electromagnetic wave signals. In this application, the electronic device 1000 is taken as a mobile phone as an example, and other devices can refer to the specific description in this application.

[0058] For ease of description, the electronic device 1000 is in Figure 1 The perspective in is used as a reference, the width direction of the electronic device 1000 is defined as the X-axis direction, the length direction of the electronic device 1000 is defined as the Y-axis direction, and the thickness direction of the electronic device 1000 is defined as the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other. The direction indicated by the arrow is the positive direction.

[0059] See also Figure 2 , the housing 300 includes a frame 310 and a back cover 320. A middle plate 330 is formed in the frame 310 by injection molding, and a plurality of mounting grooves for mounting various electronic devices are formed on the middle plate 330. The middle plate 330 and the frame 310 together form a middle frame 340 of the electronic device 1000. After the display screen 200, the middle frame 340 and the back cover 320 are covered, a receiving space is formed on both sides of the middle frame 340. One side (e.g., the back side) of the frame 310 is surrounded by the periphery of the back cover 320, and the other side (e.g., the front side) of the frame 310 is surrounded by the periphery of the display screen 200. The electronic device 1000 also includes a battery, a camera, a microphone, a receiver, a speaker, a face recognition module, a fingerprint recognition module, etc., which are arranged in the receiving space and can realize the basic functions of the mobile phone, which will not be repeated in this embodiment. It can be understood that the above introduction to the electronic device 1000 is merely an illustration of an environment in which the antenna module 100 is used, and the specific structure of the electronic device 1000 should not be understood as a limitation on the antenna module 100 provided in this application.

[0060] The antenna module 100 provided in the present application is described in detail below in conjunction with the accompanying drawings. Of course, the antenna module 100 provided in the present application includes but is not limited to the following implementation methods.

[0061] See also Figure 3 The antenna module 100 at least includes a radiator 10, a first feeding system 20 and a second feeding system 40.

[0062] The radiator 10 at least includes a first radiator 11 and a second radiator 12 .

[0063] See also Figure 3 The first radiator 11 has a first grounding end 111 and a first coupling end 112 , and a first feeding point A1 located between the first grounding end 111 and the first coupling end 112 . Figure 3 The first radiator 11 shown is only an example and does not limit the shape of the first radiator 11 provided in the present application. The first ground end 111 and the first coupling end 112 are opposite ends of the first radiator 11 in a straight bar shape. In other embodiments, the first radiator 11 is bent, and the first ground end 111 and the first coupling end 112 may not be opposite in a straight line direction, but the first ground end 111 and the first coupling end 112 are two ends of the first radiator 11.

[0064] See also Figure 3 The second radiator 12 has a second coupling end 121 and a second grounding end 122, and a second feeding point A2 located between the second coupling end 121 and the second grounding end 122. A coupling gap 113 exists between the second coupling end 121 and the first coupling end 112. The first radiator 11 and the second radiator 12 can generate capacitive coupling through the coupling gap 113. Figure 3 The second radiator 12 shown is only an example and does not limit the shape of the second radiator 12 provided in the present application. The second coupling end 121 and the second free end 122 are two ends of the second radiator 12. Optionally, the first radiator 11 and the second radiator 12 can be arranged in a straight line or approximately in a straight line (that is, there is a smaller tolerance in the design process). Of course, in other embodiments, the first radiator 11 and the second radiator 12 can also be staggered in the extension direction to form an avoidance space, etc.

[0065] See also Figure 3 The first coupling end 112 and the second coupling end 121 are opposite to each other and spaced apart. The coupling gap 113 is a gap between the first radiator 11 and the second radiator 12. For example, the width of the coupling gap 113 may be 0.5 to 2 mm, but is not limited to this size. The first radiator 11 and the second radiator 12 may be regarded as two parts of the radiator 10 separated by the coupling gap 113.

[0066] The first radiator 11 and the second radiator 12 are capacitively coupled through the coupling gap 113. "Capacitive coupling" means that an electric field is generated between the first radiator 11 and the second radiator 12, and the signal of the first radiator 11 can be transmitted to the second radiator 12 through the electric field, and the signal of the second radiator 12 can be transmitted to the first radiator 11 through the electric field, so that the first radiator 11 and the second radiator 12 can achieve electrical signal conduction even when they are not in direct contact or not directly connected.

[0067] It is understandable that the present application does not specifically limit the shape and structure of the first radiator 11 and the second radiator 12. The shapes of the first radiator 11 and the second radiator 12 include but are not limited to strips, sheets, rods, coatings, films, etc. When the first radiator 11 and the second radiator 12 are both in strip shape, the present application does not limit the extension trajectory of the first radiator 11 and the second radiator 12, so the first radiator 11 and the second radiator 12 can be extended in a straight line, a curve, a multi-section bend, etc. The above-mentioned radiator 10 can be a line with uniform width on the extension trajectory, or a strip with different widths such as a gradient width and a widened area.

[0068] Optionally, the radiator 10 is made of a conductive material, and specific materials include but are not limited to metals such as copper, gold, and silver, or alloys formed by copper, gold, and silver, or alloys formed by copper, gold, silver and other materials; graphene, or a conductive material formed by combining graphene with other materials; oxide conductive materials such as indium tin oxide; mixed materials formed by carbon nanotubes and polymers, etc.

[0069] The first ground terminal 111 and the second ground terminal 122 are both electrically connected to the reference ground GND. The reference ground GND described in the present application is a reference ground system. The reference ground system can be a single structure, or a plurality of structures that are independent of each other but electrically connected to each other. The first ground terminal 111 and the second ground terminal 122 are electrically connected to different positions of a reference ground GND structure, or two structures that are electrically connected to each other and are physically independent of each other, and the electrical connection method includes but is not limited to direct welding, or indirect electrical connection through coaxial lines, microstrip lines, conductive springs, conductive adhesives, etc.

[0070] The reference ground GND provided in the present application can be arranged inside the antenna module 100, or outside the antenna module 100 (for example, inside the electronic device 1000, or inside the electronic device of the electronic device 1000). Optionally, the antenna module 100 itself has a reference ground GND. The specific form of the reference ground GND includes but is not limited to a metal conductive plate, a metal conductive layer formed inside a flexible circuit board, or a hard circuit board. When the antenna module 100 is arranged inside the electronic device 1000, the reference ground GND of the antenna module 100 is electrically connected to the reference ground of the electronic device 1000. Optionally, the antenna module 100 itself does not have a reference ground GND, and the first ground terminal 111 and the second ground terminal 122 of the antenna module 100 are directly electrically connected or indirectly electrically connected to the reference ground of the electronic device 1000 or the reference ground of the electronic device in the electronic device 1000 through a conductive member. In this embodiment, the antenna module 100 is provided in the electronic device 1000, and the electronic device 1000 is a mobile phone. The reference ground of the electronic device 1000 is the magnesium-aluminum metal alloy plate of the middle plate 330 of the mobile phone. The first ground terminal 111 and the second ground terminal 122 of the antenna module 100 are electrically connected to the magnesium-aluminum metal alloy plate. The other structures of the antenna module 100 are subsequently electrically connected to the reference ground GND, and any of the above-mentioned embodiments of electrically connecting to the reference ground GND can be referred to.

[0071] See also Figure 3 , one end of the first feeding system 20 is electrically connected to the first feeding point A1 of the first radiator 11. The first feeding system 20 is used to excite the radiator 10 to transmit and receive electromagnetic wave signals in the first frequency band. Optionally, the first feeding system 20 includes a first matching circuit M1 and a first signal source 21. Among them, one end of the first signal source 21 is electrically connected to one end of the first matching circuit M1, and the other end of the first matching circuit M1 is electrically connected to the first feeding point A1 of the first radiator 11. The first signal source 21 includes but is not limited to a radio frequency transceiver chip or a feeding part electrically connected to a radio frequency transceiver chip. The first matching circuit M1 may include a capacitor device, an inductor device, etc. Optionally, the first matching circuit M1 also includes a switching device. The specific structure and function of the first matching circuit M1 will be described in detail later.

[0072] The present application does not limit the specific type of the electromagnetic wave signal in the first frequency band. For example, the signal type includes but is not limited to GPS signals, WiFi signals, 4G / 5G mobile communication signals, etc. Specifically, the electromagnetic wave signal in the first frequency band includes at least one of a GPS-L5 signal and a mobile communication signal with a frequency less than 1000MHz. This embodiment is illustrated by taking the first frequency band as a mobile communication signal with a frequency less than 1000MHz as an example. In this application, a 4G mobile communication signal or a 5G mobile communication signal with a frequency less than 1000MHz is defined as the LB band (i.e., the abbreviation of Low Band, which is interpreted as low frequency in Chinese). Optionally, the first frequency band is part or all of the LB band. In this embodiment, the first frequency band is part of the LB band.

[0073] Optional, see Figure 3 , the second feeding system 40 includes a second matching circuit M2 and a second signal source 31. One end of the second signal source 31 is electrically connected to one end of the second matching circuit M2, and the other end of the second matching circuit M2 is electrically connected to the second feeding point A2 of the second radiator 12. The second signal source 31 includes but is not limited to a RF transceiver chip or a feeding part electrically connected to the RF transceiver chip. The second matching circuit M2 may include a capacitor device, an inductor device, etc. Optionally, the second matching circuit M2 also includes a switch device. The specific structure and function of the second matching circuit M2 will be described in detail later.

[0074] The second feeding system 40 is used to excite the radiator 10 to send and receive electromagnetic wave signals in the second frequency band. Optionally, the electromagnetic wave signals in the first frequency band and the second frequency band are signals of the same type or different types. In this embodiment, the electromagnetic wave signals in the first frequency band and the second frequency band are signals of the same type, for example, both are 4G / 5G mobile communication signals.

[0075] Among them, the minimum frequency of the second frequency band is greater than the maximum frequency of the first frequency band. Exemplarily, the first frequency band is K1~K2, and the second frequency band is K3~K4. Among them, the value of K3 is greater than the value of K2. For example, the first frequency band is the LB frequency band, and the electromagnetic wave signal of the second frequency band includes a mobile communication signal greater than or equal to 1000MHz and less than or equal to 6000MHz. This application defines a 4G mobile communication signal or a 5G mobile communication signal with a frequency greater than or equal to 1000MHz and less than or equal to 3000MHz as the MHB frequency band (i.e., the abbreviation of Middle High Band, which is interpreted as medium and high frequency in Chinese). In this application, a 4G mobile communication signal or a 5G mobile communication signal with a frequency greater than 3000MHz and less than or equal to 6000MHz is defined as the UHB frequency band (i.e., the abbreviation of Ultra High Band, which is interpreted as ultra-high frequency in Chinese). Therefore, the second frequency band is part or all of the MHB+UHB frequency band. Among them, the MHB+UHB frequency band described in the present application is a combined frequency band formed by the MHB frequency band and the UHB frequency band, that is, greater than or equal to 1000 MHz and less than or equal to 6000 MHz.

[0076] When the feeding system (i.e., the first feeding system 20 and the second feeding system 40) are both loaded with mobile communication signals, the feeding system can load 4G mobile communication signals alone, or load 5G mobile communication signals alone, or can also load 4G mobile communication signals and 5G mobile communication signals at the same time, that is, realize dual connection (LTE NR Double Connect, ENDC) between 4G wireless access network and 5G-NR. When the feeding system loads 4G mobile communication signals or 5G mobile communication signals alone, the frequency bands received and transmitted by the feeding system include multiple carriers (carriers are radio waves of specific frequencies) aggregated, that is, carrier aggregation (CA) is realized to increase transmission bandwidth, improve throughput, and improve signal transmission rate.

[0077] See also Figure 3, the first radiator 11 is also provided with a first connection point B1 between the first feeding point A1 and the first coupling end 112. The antenna module 100 also includes a first bandpass circuit 41. The first bandpass circuit 41 is electrically connected between the first connection point B1 and the reference ground GND. The first bandpass circuit 41 is used to conduct the electromagnetic wave signal of the third frequency band to the reference ground GND. In other words, the first bandpass circuit 41 realizes a low impedance to the ground for the electromagnetic wave signal of the third frequency band. The low impedance to a certain frequency band described in the present application means that the impedance is close to zero, or is equivalent to the effect of a short circuit, that is, it is in a conducting state for the frequency band. The first bandpass circuit 41 presents a low impedance to the ground for the electromagnetic wave signal in the third frequency band, which means that the first bandpass circuit 41 conducts the electromagnetic wave signal in the third frequency band on the first radiator 11 to the reference ground GND, so that the electromagnetic wave signal in the third frequency band will no longer or less pass through the first ground terminal 111 to the ground, and by increasing the path to the ground for the electromagnetic wave signal in the third frequency band, the second feeding system 40 excites the radiator 10 to add at least one resonance mode in the third frequency band, thereby achieving that the second feeding system 40 excites the radiator 10 to have at least two resonance modes in the third frequency band. Among them, at least one resonance mode is generated by the first bandpass circuit 41 conducting the electromagnetic wave signal in the third frequency band to the reference ground GND, and at least one resonance mode is generated by the second feeding system 40 exciting the second radiator 12.

[0078] The present application does not limit the specific type of the electromagnetic wave signal in the third frequency band. For example, the signal type includes but is not limited to GPS signals, WiFi signals, 4G / 5G mobile communication signals, etc.

[0079] In this embodiment, the third frequency band is located within the range where the second frequency band is located. Optionally, the electromagnetic wave signals of the second frequency band and the third frequency band are signals of the same type, for example, both are 4G / 5G mobile communication signals. In this embodiment, the electromagnetic wave signal of the third frequency band includes a mobile communication signal with a frequency greater than 3000MHz and less than or equal to 6000MHz. Optionally, the third frequency band is part or all of the UHB frequency band. In this embodiment, the third frequency band is a part of the UHB frequency band. Optionally, the electromagnetic wave signal of the third frequency band includes a part of the frequency band of the mobile communication signal with a frequency greater than or equal to 1000MHz and less than or equal to 6000MHz. For example, the electromagnetic wave signal of the third frequency band includes a mobile communication signal of the N78 frequency band. Among them, the frequency band corresponding to N78 is 3300-4100MHz.

[0080] Generally, the frequency band of the electromagnetic wave signal corresponds one-to-one to the length of the radiator 10. In electronic devices with extremely limited space such as mobile phones, it is difficult to achieve the LB+MHB+UHB full-band signal coverage mentioned in the present application. Moreover, the UHB band for mobile communication signals is less developed and utilized. For example, a mode is generated within 3000MHz to 5000MHz, and the bandwidth of a mode is limited. In this way, it is difficult to cover some UHB bands or to achieve high-efficiency coverage in some UHB bands. For example, it is difficult to meet the N78 broadband requirements (3300 to 4100MHz). Among them, the LB+MHB+UHB band described in the present application is a combined band formed by the LB band, the MHB band and the UHB band, that is, greater than 0MHz and less than or equal to 6000MHz.

[0081] In the present application, the first bandpass circuit 41 is used to conduct the electromagnetic wave signal of the third frequency band to the reference ground GND, so that the excitation signal of the second feeding system 40 can be grounded through the first bandpass circuit 41, increase the grounding path of the electromagnetic wave signal of the third frequency band, increase the current path of the electromagnetic wave signal of the third frequency band, and enable the second feeding system 40 to excite the radiator 10 to add at least one resonance mode in the third frequency band, thereby enabling the radiator 10 to have at least two resonance modes in the third frequency band, thereby enabling the antenna module 100 to have broadband coverage in the third frequency band. When the third frequency band is the N78 frequency band, the antenna module 100 provided in the embodiment of the present application can achieve broadband coverage for the N78 frequency band. Of course, the third frequency band can also be other frequency bands in the UHB frequency band.

[0082] The present application sets the first radiator 11 and the second radiator 12 capacitively coupled to realize the first feeding system 20 and the second feeding system 40 multiplexing the first radiator 11, wherein the first feeding system 20 and the feeding system 40 respectively transmit and receive electromagnetic wave signals in the first frequency band and the second frequency band, and sets the first bandpass circuit 41, which is used to conduct the electromagnetic wave signal of the third frequency band in the second frequency band to the reference ground GND, and increases the path to the ground of the electromagnetic wave signal of the third frequency band, so that the second feeding system 40 adds at least one resonant mode in the third frequency band, thereby making The radiator 10 has at least two resonance modes in the third frequency band, thereby providing broadband coverage for the third frequency band and promoting full-frequency coverage in the second frequency band. The common-aperture technology of multiple different feeding systems is also used to improve the spatial multiplexing rate of the antenna, and the number and size of the radiators 10 can be reduced as much as possible, which is conducive to integration into the electronic device 1000 with extremely limited space. At the same time, in the process of multiplexing the first radiator 11 and the second radiator 12 by the first feeding system 20 and the second feeding system 40, multi-mode simultaneous operation is achieved, the bandwidth of the antenna is broadened, and the coverage rate of the antenna module 100 for electromagnetic wave signals is improved.

[0083] The following implementation manner is described by way of example in which the first frequency band is a part of the LB frequency band, the second frequency band is a part of the MHB+UHB frequency band, and the third frequency band is the N78 frequency band.

[0084] The specific structure of the first bandpass circuit 41 is described below with reference to the accompanying drawings. Of course, the specific structure of the first bandpass circuit 41 includes but is not limited to the following implementations.

[0085] The first bandpass circuit 41 includes one or more resonant elements, wherein the resonant element is a capacitor or an inductor.

[0086] In an alternative embodiment, see Figure 4 , the first band-pass circuit 41 includes a first capacitor C1 and a first inductor L1. One end of the first capacitor C1 is electrically connected to the first connection point B1. The other end of the first capacitor C1 is electrically connected to one end of the first inductor L1, and the other end of the first inductor L1 is electrically connected to the reference ground GND. The first band-pass circuit 41 provided in this embodiment is designed by designing the specific values ​​of the first capacitor C1 and the first inductor L1 to form a small number of resonant elements and to have the characteristic of being conductive to the ground in the third frequency band.

[0087] In another alternative embodiment, see Figure 5, the first band-pass circuit 41 includes a second capacitor C2, a second inductor L2 and a third inductor L3. One end of the second capacitor C2 and one end of the third inductor L3 are both electrically connected to the first connection point B1. The other end of the second capacitor C2 is electrically connected to one end of the second inductor L2. The other end of the second inductor L2 and the other end of the third inductor L3 are both electrically connected to the reference ground GND. The first band-pass circuit 41 provided in this embodiment is designed by designing the specific values ​​of the second capacitor C2, the second inductor L2 and the third inductor L3 to form a small number of resonant elements and to have the characteristic of being conductive to the ground in the third frequency band.

[0088] Of course, in other implementations, the first bandpass circuit 41 may also be composed of other three resonant elements or four resonant elements. Figures 19 to 21 , Figure 23 to Figure 24 In other embodiments, the first band-pass circuit 41 may also be composed of five or more resonant elements.

[0089] See also Figure 6 and Figure 7 , the first radiator 11 also includes a second connection point B2. The antenna module 100 also includes a second bandpass circuit 23. The second bandpass circuit 23 is electrically connected between the second connection point B2 and the reference ground GND. The second bandpass circuit 23 is used to conduct the electromagnetic wave signal of the second frequency band to the reference ground GND. In other words, the second bandpass circuit 23 realizes low impedance from the second frequency band to the ground. The low impedance to a certain frequency band described in the present application means that the impedance is close to zero, or equivalent to the effect of a short circuit, that is, it is in a conductive state for this frequency band. The second bandpass circuit 23 has a low impedance to the ground for the second frequency band, which means that the second bandpass circuit 23 conducts the signal of the second frequency band on the first radiator 11 to the reference ground GND, so that the signal of the second frequency band will no longer or less pass through the first ground terminal 111 to the ground, forming a new current path, and then combined with the current distribution at the gap, the radiator 10 is stimulated to form multiple resonances in the second frequency band to achieve wide bandwidth and high efficiency coverage in the second frequency band.

[0090] See also Figure 6 and Fig.14 In one implementation, the second connection point B2 is located at the first feeding point A1, and the second bandpass circuit 23 is a part of the first matching circuit M1.

[0091] The second band-pass circuit 23 is electrically connected to the first feeding point A1, and the second band-pass circuit 23 is configured to conduct the electromagnetic wave signal of the second frequency band to the reference ground GND, so that the electromagnetic wave signal of the second frequency band is returned to the ground through the second band-pass circuit 23 at the first feeding point A1, and will not affect the first feeding system 20 for receiving and transmitting the electromagnetic wave signal of the first frequency band; the number of electrical connection points on the first radiator 11 is also reduced.

[0092] See also Figure 7 In another embodiment, the second connection point B2 is located between the first connection point B1 and the first feeding point A1. By designing the second connection point B2 to be located between the first connection point B1 and the first feeding point A1, the second connection point B2 has a relatively large setting position area, thereby improving the position flexibility of the second connection point B2.

[0093] The specific structure of the second bandpass circuit 23 is described below with reference to the accompanying drawings. Of course, the second bandpass circuit 23 provided in the present application includes but is not limited to the following implementations.

[0094] See also Figure 8 , the second band-pass circuit 23 includes a third capacitor C3 and a fourth inductor L4. One end of the third capacitor C3 is electrically connected to the second connection point B2. The other end of the third capacitor C3 is electrically connected to one end of the fourth inductor L4, and the other end of the fourth inductor L4 is electrically connected to the reference ground GND. The second band-pass circuit 23 provided in this embodiment is designed by designing the specific values ​​of the third capacitor C3 and the fourth inductor L4 to form a small number of resonant elements and to have the characteristic of being conductive to the ground in the second frequency band.

[0095] Of course, in other embodiments, the second bandpass circuit 23 may also be composed of other three resonant elements or four resonant elements. Figures 17 to 22 In other embodiments, the second band-pass circuit 23 may also be composed of five or more resonant elements.

[0096] The present application does not specifically limit the specific configuration of the second bandpass circuit 23. Optionally, the second bandpass circuit 23 can be electrically connected in parallel with the first matching circuit M1 to different points on the first radiator 11, or the second bandpass circuit 23 can be electrically connected in parallel with the first matching circuit M1 to the same point on the first radiator 11, or the second bandpass circuit 23 is a part of the first matching circuit M1 (see Fig.14 ).

[0097] The antenna principle of the first feeding system 20 when working is described below by way of example with reference to the accompanying drawings.

[0098] See also Fig. 9 , Fig. 9 : is an antenna schematic diagram of the first feeding system 20 when it is working. The first feeding system 20 excites the first radiator 11 to generate at least one resonant mode. The frequency band supported by the resonant mode is in the LB frequency band.

[0099] See also Fig.10 , the current corresponding to the resonance mode n generated by the first feeding system 20 exciting the first radiator 11 is mainly distributed between the first ground terminal 111 and the first coupling terminal 112 of the first radiator 11. It can also be stated that the current density generated by the excitation signal of the first feeding system 20 on the radiator 10 is mainly distributed between the first ground terminal 111 and the first coupling terminal 112 of the first radiator 11. It should be noted that the current corresponding to the resonance mode generated by the first feeding system 20 exciting the radiator 10 is mainly distributed between the first ground terminal 111 and the first coupling terminal 112 of the first radiator 11, which means that a relatively strong current is distributed between the first ground terminal 111 and the first coupling terminal 112 of the first radiator 11, and it does not exclude that due to the coupling effect between the first radiator 11 and the second radiator 12, a small amount of current generated by the excitation signal of the first feeding system 20 on the first radiator 11 is distributed on the second radiator 12. This application does not limit the direction of the resonant current.

[0100] Among them, the resonant mode is characterized by that the antenna module 100 has a higher electromagnetic wave receiving and transmitting efficiency at and near the resonant frequency. The resonant frequency is the resonant frequency of the resonant mode, and the resonant frequency and its vicinity form the frequency band supported or covered by the resonant mode. Optionally, in the return loss curve, the absolute value of the return loss value greater than or equal to 5dB (only for example, and cannot be used as a limitation of the return loss value of higher efficiency in this application) is taken as a reference value with higher electromagnetic wave receiving and transmitting efficiency. The set of frequencies in a resonant mode where the absolute value of the return loss value is greater than or equal to 5dB is taken as the frequency band supported by the resonant mode.

[0101] Optionally, the resonance mode generated by the first feeding system 20 exciting the first radiator 11 is a 1 / 4 wavelength mode in which the resonance current mainly works on the first ground terminal 111 to the first coupling terminal 112 of the first radiator 11. From a perspective of ease of understanding, the 1 / 4 wavelength mode can be understood as the effective electrical length from the first ground terminal 111 to the first coupling terminal 112 of the first radiator 11 is approximately 1 / 4 times the wavelength of the medium (the wavelength in the medium) corresponding to the center frequency of the resonance mode. This description is an explanation for the ease of understanding of the term, but it cannot be used as a limitation on the length from the first ground terminal 111 to the first coupling terminal 112 of the first radiator 11. Of course, in other embodiments, the resonance mode generated by the first feeding system 20 exciting the first radiator 11 can also be a higher-order mode in which the resonance current mainly works on the first radiator 11, such as a 1 / 2 wavelength mode, a 3 / 4 wavelength mode, and the like.

[0102] Optionally, the first matching circuit M1 also includes a circuit having a band-stop characteristic for the electromagnetic wave signal in the second frequency band, thereby filtering the electromagnetic wave signal in the second frequency band while having no effect on the electromagnetic wave signal in the first frequency band, so that the first feeding system 20 excites the first radiator 11 to send and receive electromagnetic wave signals in the first frequency band.

[0103] Optionally, the second connection point B2 is the first feeding point A1, and the second bandpass circuit 23 is a part of the first matching circuit M1 (see Fig.14 ). At this time, the second band-pass circuit 23 can also be used as a circuit to realize the function of the electromagnetic wave signal in the second frequency band.

[0104] Optional, see Figure 6 and Fig.11 , the antenna module 100 also includes a first adjustment circuit T1. One end of the first adjustment circuit T1 is electrically connected to the first radiator 11, and the other end of the first adjustment circuit T1 is electrically connected to the reference ground GND. The first adjustment circuit T1 is used to adjust the frequency band of the electromagnetic wave signal in the first frequency band. The present application does not specifically describe the position where the first adjustment circuit T1 is electrically connected to the first radiator 11. Optionally, a first adjustment point B3 for electrically connecting the first adjustment circuit T1 is defined between the first ground terminal 111 and the first coupling terminal 112 of the first radiator 11.

[0105] Optionally, the first adjustment point B3 is located on the first radiator 11 and close to a current strong point on the first radiator 11. For example, the distance between the first adjustment point B3 and the first ground terminal 111 is greater than the distance between the first adjustment point B3 and the first coupling terminal 112, so that the first adjustment circuit T1 can adjust the position of the frequency band supported by the first radiator 11 within a certain range.

[0106] Specifically, the first regulating circuit T1 includes a variable capacitor and at least one of a plurality of switch selection circuits. The switch selection circuit includes at least one of a combination of a switch and an inductor, a combination of a switch and a capacitor, and a combination of a switch and an inductor and a capacitor. The first regulating circuit T1 switches between different frequency bands by controlling the on and off of a switch or adjusting the variable capacitor to switch different impedances to ground.

[0107] See also Fig.12 The first regulating circuit T1 includes a single-pole double-throw switch 51, a first lumped element 52 electrically connected to the reference ground GND, and a second lumped element 53 electrically connected to the reference ground GND. The first lumped element 52 and the second lumped element 53 both include an inductor, a capacitor, or a combination of an inductor and a capacitor. The combination of the inductor and the capacitor of the lumped element can be Figures 17 to 24 combination.

[0108] The first lumped element 52 and the second lumped element 53 have different impedances to the ground for the electromagnetic wave signal in the first frequency band. Of course, the single-pole double-throw switch 51 and the two lumped elements 52 and 53 are only examples, and the present application is not limited to two lumped elements and a single-pole double-throw switch, which can be two independent switches; in addition, the number of lumped elements can be three, four, etc.

[0109] The antenna module 100 also includes a controller (not shown), which is electrically connected to the first adjustment circuit T1. The controller controls the switch of the first adjustment circuit T1 to electrically connect different lumped elements to achieve different impedances to ground for the electromagnetic wave signal of the first frequency band, thereby achieving position adjustment of the frequency band of the electromagnetic wave signal of the first frequency band. For example, when the switched inductance value is smaller, the frequency band of the electromagnetic wave signal of the first frequency band is more offset toward the high frequency end; when the switched capacitance value is larger, the frequency band of the electromagnetic wave signal of the first frequency band is more offset toward the low frequency end.

[0110] Of course, in other embodiments, the first adjustment point B3 is the first feeding point A1, and one end of the first adjustment circuit T1 is electrically connected to the first feeding point A1 to reduce the electrical connection points on the first radiator 11. In actual products, the number of electrical connectors such as spring clips can be reduced.

[0111] For further information, see Fig.13 and Fig.14 , the first regulating circuit T1 is a part of the first matching circuit M1. Thus, the first regulating circuit T1 can be prepared in the process of preparing the first matching circuit M1. Compared with the independent setting of the first regulating circuit T1, the number of electrical connection points on the first radiator 11 can be reduced, the centralized setting of the circuit can be realized, and the function multiplexing of the first regulating circuit T1 in the first matching circuit M1 can be realized. For example, some capacitors or inductors in the first regulating circuit T1 can also be used for frequency selection or tuning in the first matching circuit M1. The first regulating circuit T1 can be used as a series branch or a parallel branch of the first matching circuit M1. See again Fig.13 and Fig.14 The second bandpass circuit 23 is also a part of the first matching circuit M1, so as to further reduce the number of electrical connection points on the first radiator 11, realize the modular setting of the circuit, and improve the reuse rate of inductors and capacitors in each circuit.

[0112] See also Fig.14 , Fig.14 Schematic diagram of the first regulating circuit T1 as a parallel branch of the first matching circuit M1. The second bandpass circuit 23 also serves as a parallel branch of the first matching circuit M1.

[0113] One end of the first regulating circuit T1 is electrically connected to the first feeding point A1, and the other end of the first regulating circuit T1 is electrically connected to the reference ground GND. For example, the first regulating circuit T1 includes four switches (SW1-SW4) and four regulating branches (P1~P4), and each switch is electrically connected to an regulating branch. Among them, the first regulating branch P1, the second regulating branch P2 and the third regulating branch P3 are all inductors electrically connected to the reference ground GND, and the inductance values ​​in different regulating branches are different. The fourth regulating branch P4 is a capacitor electrically connected to the reference ground GND. The above is only an example of the first regulating circuit T1, and each regulating branch can also refer to Figures 17 to 24 The combination of resonant elements in.

[0114] Please refer to 14, the first adjustment circuit T1 is a part of the first matching circuit M1, and serves as a parallel branch in the first matching circuit M1. The first matching circuit M1 also includes a first tuning circuit 22. One end of the first tuning circuit 22 is electrically connected to the first feeding point A1, and the other end of the first tuning circuit 22 is electrically connected to the first signal source 21. The first tuning circuit 22 is used to tune the resonant frequency and frequency band width of the electromagnetic wave signal in the first frequency band.

[0115] For example, please refer to 14, the first tuning circuit 22 includes a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a fifth inductor L5 and a sixth inductor L6. One end of the fourth capacitor C4 is electrically connected to the first feeding point A1, the other end of the fourth capacitor C4 is electrically connected to one end of the fifth capacitor C5, the other end of the fifth capacitor C5 is electrically connected to one end of the sixth capacitor C6, one end of the fifth inductor L5 and one end of the sixth inductor L6, the other end of the sixth capacitor C6 is electrically connected to the reference ground GND, the other end of the fifth inductor L5 is electrically connected to the reference ground GND, the other end of the sixth inductor L6 is electrically connected to the first signal source 21 and one end of the seventh capacitor C7, and the other end of the seventh capacitor C7 is electrically connected to the reference ground GND. The above is only an example of the first tuning circuit 22, wherein the resonant element in the first tuning circuit 22 can also refer to Figures 17 to 24 The combination of resonant elements in.

[0116] See also Fig.15 , Fig.15 The first regulating circuit T1 is a schematic diagram of a series branch of the first matching circuit M1. The first regulating circuit T1 is a part of the first matching circuit M1. The first regulating circuit T1 includes four switches, wherein three switches are electrically connected to three regulating branches respectively, and the fourth switch connects the above three switches in series with the capacitor in the first matching circuit M1. The three regulating branches are grounding inductors with three different inductance values. By switching the four switches, different combinations of capacitors and inductors (i.e., LC resonant circuits) are formed to form different impedances to the ground for the electromagnetic wave signal in the first frequency band, so as to achieve the electromagnetic wave signal in the first frequency band shifting toward the low frequency end or toward the high frequency end.

[0117] See also Fig.16 , Fig.16 It is a schematic diagram of switching different frequency bands of the electromagnetic wave signal in the first frequency band by the first regulating circuit T1. Fig.16 In the example, the first frequency band is tuned between the B5 frequency band, the B8 frequency band, and the B28 frequency band. Of course, the B5 frequency band, the B8 frequency band, and the B28 frequency band are only examples that the electromagnetic wave signal of the first frequency band can be shifted toward the high frequency end or toward the low frequency end within the low frequency range, and the electromagnetic wave signal of the first frequency band is not limited to the B5 frequency band, or the B8 frequency band, or the B28 frequency band. Of course, the embodiment of the present application can also adjust the electromagnetic wave signal of the first frequency band to cover the B20 frequency band. By Fig.15It can be seen that by setting the first adjustment circuit T1, the electromagnetic wave signal of the first frequency band can be shifted toward the high frequency end or the low frequency end within the low frequency range, thereby achieving broadband coverage of the first frequency band and meeting the low frequency coverage requirements.

[0118] By setting the first adjustment circuit T1 on the first radiator 11, the first adjustment circuit T1 switches the electromagnetic wave signal of the first frequency band within different frequency bands to improve the coverage within the low frequency band, so that the antenna module 100 can support many application frequency bands of the low frequency band, and thus support the use of frequency bands in different places. The antenna module 100 and the electronic device 1000 where the antenna module 100 is located can be used globally and support mobile communication signals of different operators.

[0119] When the first adjustment circuit T1 is provided in the first matching circuit M1, other parts of the first matching circuit M1 may also include the above-mentioned variable capacitor, multiple switch selection circuits, etc. to achieve switching. When the first matching circuit M1 does not include the above-mentioned first adjustment circuit T1, the first matching circuit M1 may include the above-mentioned variable capacitor, multiple switch selection circuits, etc. to achieve switching. The above-mentioned variable capacitor, multiple switch selection circuits, etc. may also be used in the second matching circuit M2 to achieve switching.

[0120] The matching circuit provided in the present application (for example, at least one of the first matching circuit M1 and the second matching circuit M2) has a frequency-selective filtering circuit electrically connected to the reference ground GND to achieve broadband matching and high isolation of the antenna module 100. The frequency-selective filtering circuit is composed of one resonant device or multiple resonant devices, wherein the resonant device is a capacitor or an inductor. The present application does not limit the number of resonant devices. Multiple resonant devices can be combined in series or in parallel to form different resonant circuits. The following examples are given in conjunction with the accompanying drawings for several combinations of two resonant devices, three resonant devices, and four resonant devices. It should be noted that the following examples cannot limit the frequency-selective filtering circuit to the following resonant circuit. Taking the frequency-selective filtering circuit of the first matching circuit M1 as an example, the frequency-selective filtering circuit of the second matching circuit M2 can adjust the number of resonant devices and the electrical connection method according to actual needs.

[0121] See also Fig.17 The frequency-selective filter circuit of the first matching circuit M1 includes a bandpass circuit formed by an inductor L00 and a capacitor C00 connected in series.

[0122] See also Fig.18 The frequency-selective filter circuit of the first matching circuit M1 includes a band-stop circuit formed by an inductor L00 and a capacitor C00 connected in parallel.

[0123] See also Fig.19 The frequency selection filter circuit of the first matching circuit M1 includes a bandpass or bandstop circuit formed by an inductor L00, a capacitor C01 and a capacitor C02. The inductor L00 is connected in parallel with the capacitor C01, and the capacitor C02 is electrically connected to the node where the inductor L00 and the capacitor C01 are electrically connected.

[0124] See also Fig. 20 The frequency selection filter circuit of the first matching circuit M1 includes a bandpass or bandstop circuit formed by a capacitor C00, an inductor L01 and an inductor L02. The capacitor C00 is connected in parallel with the inductor L01, and the inductor L02 is electrically connected to a node where the capacitor C00 and the inductor L01 are electrically connected.

[0125] See also Fig.21 The frequency selection filter circuit of the first matching circuit M1 includes a bandpass or band-stop circuit formed by an inductor L00, a capacitor C01 and a capacitor C02. The inductor L00 is connected in series with the capacitor C01, and one end of the capacitor C02 is electrically connected to the first end of the inductor L00 that is not connected to the capacitor C01, and the other end of the capacitor C02 is electrically connected to the end of the capacitor C01 that is not connected to the inductor L00.

[0126] See also Fig. 22 The frequency selection filter circuit of the first matching circuit M1 includes a bandpass or band-stop circuit formed by a capacitor C00, an inductor L01 and an inductor L02. The capacitor C00 is connected in series with the inductor L01, one end of the inductor L02 is electrically connected to the end of the capacitor C00 that is not connected to the inductor L01, and the other end of the inductor L02 is electrically connected to the end of the inductor L01 that is not connected to the capacitor C00.

[0127] See also Fig.23 The frequency selection filter circuit of the first matching circuit M1 includes a capacitor C01, a capacitor C02, an inductor L01 and an inductor L02. The capacitor C01 is connected in parallel with the inductor L01, the capacitor C02 is connected in parallel with the inductor L02, and one end of the whole formed by the capacitor C02 and the inductor L02 in parallel is electrically connected to one end of the whole formed by the capacitor C01 and the inductor L01 in parallel.

[0128] See also Fig.24 The frequency selective filtering circuit of the first matching circuit M1 includes a capacitor C01, a capacitor C02, an inductor L01 and an inductor L02. The capacitor C01 and the inductor L01 are connected in series to form a first unit 101, the capacitor C02 and the inductor L02 are connected in series to form a second unit 102, and the first unit 101 and the second unit 102 are connected in parallel.

[0129] The antenna principle of the second feeding system 40 when working is described below by way of example with reference to the accompanying drawings.

[0130] See also Fig.25 and Fig.26 , Fig.25It is a diagram of an equivalent antenna form in which the second feeding system 40 excites the radiator 10 to transmit and receive electromagnetic wave signals in the second frequency band. Fig.26 is an S parameter curve diagram of the second feeding system 40 exciting the radiator 10 to transmit and receive electromagnetic wave signals in the second frequency band. Fig.25 In the antenna form shown, the radiator 10 supports a first resonance mode a, a second resonance mode b, a third resonance mode c and a fourth resonance mode d under the excitation of the second feeding system 40 .

[0131] Among them, the current of the first resonant mode a is at least distributed between the second coupling end 121 and the second grounding end 122 of the second radiator 12. Specifically, the current corresponding to the first resonant mode a generated by the second feeding system 40 exciting the radiator 10 (referred to as the first resonant current in this application) is mainly distributed between the second coupling end 121 and the second grounding end 122 of the second radiator 12, and this application does not specifically limit the direction of the resonant current. It should be noted that the first resonant current is mainly distributed between the second coupling end 121 and the second grounding end 122 of the second radiator 12, which means that a stronger current is distributed between the second coupling end 121 and the second grounding end 122 of the second radiator 12, and it does not exclude that a small amount of the first resonant current is distributed on the first radiator 11 due to the coupling effect between the first radiator 11 and the second radiator 12.

[0132] The first resonance mode a includes a 1 / 4 wavelength mode of the second radiator 12. Specifically, the first resonance mode a includes a 1 / 4 wavelength mode in which the first resonance current mainly works on the second coupling end 121 to the second ground end 122 of the second radiator 12. From an easy-to-understand perspective, the 1 / 4 wavelength mode can be understood as the effective electrical length from the second coupling end 121 to the second ground end 122 of the second radiator 12 is approximately 1 / 4 times the medium wavelength (wavelength in the medium) corresponding to the center frequency of the resonance mode. This description is an explanation for the ease of understanding of the term, but it cannot be used as a limitation on the length of the second radiator 12. Of course, in other embodiments, the resonance mode generated by the second feeding system 40 exciting the radiator 10 can also be a higher-order mode in which the first resonance current mainly works on the second radiator 12, such as a 1 / 2 wavelength mode, a 3 / 4 wavelength mode, and the like.

[0133] The length between the second coupling end 121 and the second grounding end 122 is designed so that the length between the second coupling end 121 and the second grounding end 122 corresponds to the MHB frequency band, thereby generating the first resonance mode a covering the MHB frequency band.

[0134] Among them, the current of the second resonant mode b is at least distributed between the second connection point B2 and the first coupling end 112 and between the second coupling end 121 and the second feeding point A2. Specifically, the current corresponding to the second resonant mode b generated by the second feeding system 40 exciting the radiator 10 (referred to as the second resonant current in this application) is mainly distributed between the second connection point B2 and the first coupling end 112 and between the second coupling end 121 and the second feeding point A2, and this application does not specifically limit the direction of the resonant current. It should be noted that the second resonant current is mainly distributed between the second connection point B2 and the first coupling end 112 and between the second coupling end 121 and the second feeding point A2, which means that a stronger current is distributed between the second connection point B2 and the first coupling end 112 and between the second coupling end 121 and the second feeding point A2, and does not exclude that a small amount of the second resonant current is distributed in other parts of the first radiator 11 and other parts of the second radiator 12.

[0135] The second resonance mode b includes a 1 / 4 wavelength mode between the second connection point B2 of the first radiator 11 and the first coupling end 112. Specifically, the second resonance mode b includes a 1 / 4 wavelength mode in which the second resonance current mainly works on the second connection point B2 of the first radiator 11 to the first coupling end 112. From an easy-to-understand perspective, the 1 / 4 wavelength mode can be understood as the effective electrical length from the second connection point B2 of the first radiator 11 to the first coupling end 112 is approximately 1 / 4 times the wavelength of the medium (the wavelength in the medium) corresponding to the center frequency of the resonance mode. This description is an explanation for the ease of understanding of the term, but it cannot be used as a limitation on the length from the second connection point B2 of the first radiator 11 to the first coupling end 112. Of course, in other embodiments, the resonance mode generated by the second feeding system 40 exciting the radiator 10 can also be a higher-order mode in which the second resonance current mainly works on the radiator 10, such as a 1 / 2 wavelength mode, a 3 / 4 wavelength mode, and the like.

[0136] It can be understood that the present application sets the second bandpass circuit 23 at the second connection point B2 to realize that the electromagnetic wave signal of the second frequency band is transmitted to the reference ground GND through the second bandpass circuit 23 at the second connection point B2, thereby forming a current distribution of the second resonant current, thereby promoting the generation of the second resonant mode b.

[0137] The length between the second connection point B2 and the first coupling end 112 is designed so that the length between the second connection point B2 and the first coupling end 112 corresponds to the MHB frequency band, thereby generating the second resonance mode b covering the MHB frequency band.

[0138] Among them, the current of the third resonant mode c is at least distributed between the second coupling end 121 and the second feeding point A2. Specifically, the current corresponding to the third resonant mode c generated by the second feeding system 40 exciting the radiator 10 (referred to as the third resonant current in this application) is mainly distributed between the second coupling end 121 of the second radiator 12 and the second feeding point A2, and this application does not specifically limit the direction of the resonant current. It should be noted that the third resonant current is mainly distributed between the second coupling end 121 of the second radiator 12 and the second feeding point A2, which means that a stronger current is distributed between the second coupling end 121 of the second radiator 12 and the second feeding point A2, and does not exclude that due to the coupling effect between the first radiator 11 and the second radiator 12, a small amount of the third resonant current is distributed in other positions of the first radiator 11 and the second radiator 12.

[0139] The third resonance mode c includes a 1 / 4 wavelength mode between the second coupling end 121 of the second radiator 12 and the second feeding point A2. Specifically, the third resonance mode c includes a 1 / 4 wavelength mode in which the third resonance current mainly works on the second coupling end 121 of the second radiator 12 to the second feeding point A2. From an easy-to-understand perspective, the 1 / 4 wavelength mode can be understood as the effective electrical length from the second coupling end 121 of the second radiator 12 to the second feeding point A2 is approximately 1 / 4 times the wavelength of the medium (the wavelength in the medium) corresponding to the center frequency of the resonance mode. This description is an explanation for the ease of understanding of the term, but it cannot be used as a limitation on the length from the second coupling end 121 of the second radiator 12 to the second feeding point A2. Of course, in other embodiments, the resonance mode generated by the second feeding system 40 exciting the radiator 10 can also be a higher-order mode in which the third resonance current mainly works on the radiator 10, such as a 1 / 2 wavelength mode, a 3 / 4 wavelength mode, and the like.

[0140] The length between the second feeding point A2 and the second coupling end 121 is designed so that the length 121 from the second feeding point A2 to the second coupling end corresponds to the third frequency band (UHB band), thereby generating the third resonance mode c covering the third frequency band.

[0141] Among them, the current of the fourth resonant mode d is at least distributed between the first connection point B1 and the first coupling end 112 and the second coupling end 121 and the second feeding point A2. Specifically, the current corresponding to the fourth resonant mode d generated by the second feeding system 40 exciting the radiator 10 (referred to as the fourth resonant current in this application) is mainly distributed between the first coupling end 112 and the second coupling end 121 and the second feeding point A2, and this application does not specifically limit the direction of the resonant current. It should be noted that the fourth resonant current is mainly distributed between the first coupling end 112 and the second coupling end 121 and the second feeding point A2, which means that a stronger current is distributed between the first coupling end 112 and the second coupling end 121 and the second feeding point A2, and does not exclude a small amount of the fourth resonant current distributed in other positions of the first radiator 11 and other positions of the second radiator 12.

[0142] The fourth resonance mode d includes a 1 / 4 wavelength mode between the first connection point B1 of the first radiator 11 and the first coupling end 112. Specifically, the fourth resonance mode d includes a 1 / 4 wavelength mode in which the fourth resonance current mainly works on the first connection point B1 of the first radiator 11 to the first coupling end 112. From an easy-to-understand perspective, the 1 / 4 wavelength mode can be understood as the effective electrical length from the first connection point B1 of the first radiator 11 to the first coupling end 112 is approximately 1 / 4 times the wavelength of the medium (the wavelength in the medium) corresponding to the center frequency of the resonance mode. This description is an explanation for the ease of understanding of the term, but it cannot be used as a limitation on the length from the first connection point B1 of the first radiator 11 to the first coupling end 112. Of course, in other embodiments, the resonance mode generated by the second feeding system 40 exciting the radiator 10 can also be a higher-order mode in which the fourth resonance current mainly works on the radiator 10, such as a 1 / 2 wavelength mode, a 3 / 4 wavelength mode, and the like.

[0143] It can be understood that the present application sets the first bandpass circuit 41 at the first connection point B1 to realize that the electromagnetic wave signal of the third frequency band is transmitted through the first bandpass circuit 41 to the reference ground GND at the first connection point B1, thereby forming a current distribution of the third resonant current, and further promoting the generation of the fourth resonant mode d.

[0144] The length between the first connection point B1 and the first coupling end 112 is designed so that the length between the first connection point B1 and the first coupling end 112 corresponds to the third frequency band, thereby generating the fourth resonance mode d covering the third frequency band.

[0145] As can be seen from the above, by setting the second bandpass circuit 23 to be grounded, multiple resonant modes can be formed in the MHB+UHB frequency band, and by adding the first bandpass circuit 41 to be grounded, at least one resonant mode can be added in the UHB frequency band to achieve efficient broadband coverage of the UHB frequency band. In one application, by setting the length between the first connection point B1 and the first coupling end 112 to correspond to the N78 frequency band, the high-efficiency broadband coverage of the antenna module 100 in the N78 frequency band can be improved.

[0146] The order of the wavelength modes of the first resonance mode a, the second resonance mode b, the third resonance mode c and the fourth resonance mode d is determined according to the length of the radiator 10 where each resonance current mainly works. It can be seen from the wavelength modes of the first resonance mode a, the second resonance mode b, the third resonance mode c and the fourth resonance mode d that the first resonance mode a, the second resonance mode b, the third resonance mode c and the fourth resonance mode d are all 1 / 4 wavelength modes, wherein the 1 / 4 wavelength mode is also called the fundamental mode, which is a high-efficiency mode and can achieve high efficiency and wide coverage in the MHB+UHB frequency band.

[0147] By setting the first band-pass circuit 41 to be electrically connected to the first connection point B1, and setting the first band-pass circuit 41 to conduct the mobile communication signal of the second frequency band to the reference ground GND, combined with the above-mentioned setting of the second band-pass circuit 23 to be electrically connected to the first feeding point A1, and setting the second band-pass circuit 23 to conduct the mobile communication signal of the second frequency band to the reference ground GND, it is achieved that the mobile communication signal of the second frequency band can reach the reference ground GND via the first feeding point A1 and the second band-pass circuit 23, and can also reach the reference ground GND via the first connection point B1 and the first band-pass circuit 41, thereby increasing the return path to the ground; through the above-mentioned current path planning for the electromagnetic wave signal of the second frequency band (MHB+UHB band), the second feeding system 40 can excite the first radiator 11 and the second radiator. 12 generates the above-mentioned first resonance mode a, the second resonance mode b, the third resonance mode c and the fourth resonance mode d, and the second feeding system 40 reuses the mutually coupled first radiator 11 and the second radiator 12 to generate the above-mentioned four resonance modes. For example, it can be clearly seen from the second resonance mode b and the fourth resonance mode d that the resonance current forms a current distribution (or current density distribution) on both the first radiator 11 and the second radiator 12, and the above-mentioned four resonance modes are all located in the MHB+UHB frequency band, achieving full coverage in the MHB+UHB frequency band, wherein two modes are located in the UHB frequency band to improve the coverage rate of the antenna module 100 for the UHB frequency band, and when the UHB frequency band is the N78 frequency band, the broadband coverage requirement of the N78 frequency band (3300-4100MHz) is achieved. Of course, the UHB frequency band can also be other frequency bands, such as the N79 frequency band.

[0148] See also Fig. 27 , Fig. 27 The first feeding system 20 and the second feeding system 40 excite the radiator 10 to generate the resonance mode n covering low frequency, the first resonance mode a covering the MHB+UHB frequency band, the second resonance mode b, the third resonance mode c, and the fourth resonance mode d. S1,1 is the S parameter curve covering the LB frequency band. S2,2 is the S parameter curve of the MHB+UHB frequency band. According to S1,1 and S2,2, it can be seen that the antenna module 100 provided in the present application has a good coverage width in the LB frequency band + MHB+UHB frequency band, especially in the UHB frequency band, forming two resonance modes, realizing the broadband coverage requirement of the N78 frequency band (3300~4100MHz).

[0149] See also Fig.28 , Fig.28This is an isolation curve diagram of the antenna module 100 provided in one of the embodiments of the present application in one state. It can be seen from the figure that the S parameters between two adjacent signal sources are all below -15dB, indicating that there is good isolation between the two adjacent signal sources.

[0150] See also Fig.29 , Fig.29 It is an efficiency diagram of the antenna module 100 provided in an embodiment of the present application. S01 and S02 are efficiency curves of the first bandpass circuit 41 and the first bandpass circuit 41 not being provided, respectively. The antenna module 100 provided with the first bandpass circuit 41 has two resonances, and the bandwidth is increased. The efficiency at the first point of the curve S01 and the second point of the curve S02 is about 4 GHz, and the efficiency of the antenna module 100 provided with the first bandpass circuit 41 at about 4 GHz is greater than the efficiency of the antenna module 100 not provided with the first bandpass circuit 41 at about 4 GHz. Moreover, the efficiency of the antenna module 100 provided with the first bandpass circuit 41 in the frequency band of 3300 to 4100 MHz is greater than the efficiency of the antenna module 100 not provided with the first bandpass circuit 41 in the frequency band of 3300 to 4100 MHz. In other words, the bandwidth increases after the first bandpass circuit 41 is provided, and the efficiency in the frequency band of 3300 to 4100 MHz increases.

[0151] The second matching circuit M2 is used to tune the center frequency and bandwidth of the electromagnetic wave signal of the second frequency band (MHB+UHB frequency band). The structure of the second matching circuit M2 provided in the present application is illustrated below with reference to the accompanying drawings. Of course, the second matching circuit M2 provided in the present application includes but is not limited to the following implementations.

[0152] See also Fig.30The second matching circuit M2 includes a seventh inductor L7, an eighth inductor L8, a ninth inductor L9, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10 and an eleventh capacitor C11. One end of the seventh inductor L7 is electrically connected to the second feeding point A2, the other end of the seventh inductor L7 is electrically connected to one end of the eighth inductor L8, one end of the eighth capacitor C8 and one end of the ninth capacitor C9, the other end of the eighth inductor L8 and the other end of the eighth capacitor C8 are both electrically connected to the reference ground GND, the other end of the ninth capacitor C9 is electrically connected to one end of the tenth capacitor C10, the other end of the tenth capacitor C10 is electrically connected to one end of the ninth inductor L9 and one end of the second signal source 31, the other end of the ninth inductor L9 is electrically connected to one end of the eleventh capacitor C11, and the other end of the eleventh capacitor C11 is electrically connected to the reference ground GND. By designing the above-mentioned second matching circuit M2, the center frequency and bandwidth of the electromagnetic wave signal in the second frequency band are tuned to achieve tuning of the resonant frequency and bandwidth of the first resonant mode a, the second resonant mode b, the third resonant mode c, and the fourth resonant mode d, thereby achieving wide coverage of the antenna module 100 in the MHB+UHB frequency band.

[0153] For further information, see Figure 3 and Fig.25 The antenna module 100 further includes a second adjustment circuit T2 having one end electrically connected to the reference ground GND. The other end of the second adjustment circuit T2 is electrically connected to the second radiator 12 or the second matching circuit M2. The second adjustment circuit T2 is used to adjust the frequency band of the electromagnetic wave signal of the second frequency band (MHB+UHB frequency band).

[0154] Specifically, the second regulating circuit T2 includes at least one of a variable capacitor and a plurality of switch selection circuits. The switch selection circuit includes at least one of a combination of a switch and an inductor, a combination of a switch and a capacitor, and a combination of a switch and an inductor and a capacitor. The second regulating circuit T2 switches between different frequency bands by controlling the on and off of the switch or adjusting the variable capacitor to switch different impedances to ground.

[0155] The second regulating circuit T2 includes a single-pole double-throw switch and a plurality of lumped elements electrically connected to the reference ground. The lumped elements include inductors, capacitors, or a combination of inductors and capacitors. The combination of the inductors and capacitors of the lumped elements can be Figures 17 to 24 Different lumped elements have different impedances to the ground for the electromagnetic wave signal in the second frequency band.

[0156] The antenna module 100 also includes a controller (not shown), which is electrically connected to the second adjustment circuit T2. The controller controls the switch of the second adjustment circuit T2 to electrically connect different lumped elements to achieve different impedances to ground for the electromagnetic wave signal of the second frequency band, thereby achieving position adjustment of the frequency band of the electromagnetic wave signal of the second frequency band. For example, when the switched inductance value is smaller, the frequency band of the electromagnetic wave signal of the second frequency band is more offset toward the high frequency end; when the switched capacitance value is larger, the frequency band of the electromagnetic wave signal of the second frequency band is more offset toward the low frequency end.

[0157] Optionally, one end of the second regulating circuit T2 is electrically connected to the second feeding point A2 to reduce the number of electrical connection points on the second radiator 12. In actual products, the number of electrical connectors such as springs can be reduced.

[0158] Furthermore, the second regulating circuit T2 is a part of the second matching circuit M2. Thus, the second regulating circuit T2 can be prepared in the process of preparing the second matching circuit M2. Compared with the independent setting of the second regulating circuit T2, the number of electrical connection points on the second radiator 12 can be reduced, the centralized setting of the circuit can be realized, and the function multiplexing of the second regulating circuit T2 in the second matching circuit M2 can be realized. For example, some capacitors or inductors in the second regulating circuit T2 can also be used for frequency selection or tuning in the second matching circuit M2. The second regulating circuit T2 can be used as a series branch or a parallel branch of the second matching circuit M2.

[0159] The second regulating circuit T2 has similar functions to the first regulating circuit T1. Moreover, the structure of the second regulating circuit T2 is also similar to that of the first regulating circuit T1, including at least one of a variable capacitor and a plurality of switch selection circuits. The switch selection circuit can refer to the description of the first regulating circuit T1, which will not be repeated here.

[0160] The regulation principle of the second regulation circuit T2 for the electromagnetic wave signal of the second frequency band (MHB+UHB frequency band) is the same as the regulation principle of the first regulation circuit T1 for the electromagnetic wave signal of the first frequency band. By setting the second regulation circuit T2, the second regulation circuit T2 switches the electromagnetic wave signal of the second frequency band (MHB+UHB frequency band) within different frequency bands to improve the coverage within the MHB+UHB frequency band, so that the antenna module 100 can support many application frequency bands of the MHB+UHB frequency band, and thus support the use of frequency bands in different places. The antenna module 100 and the electronic device 1000 where the antenna module 100 is located can be used globally and support mobile communication signals of different operators.

[0161] The first feeding system 20 and the second feeding system 40 excite the radiator 10 to achieve coverage of LB+MHB+UHB mobile communication signals. Subsequently, the first adjustment circuit T1 (including a switch selection circuit or a variable capacitor) with adjustable frequency band movement set in the first feeding system 20 and the second feeding system 40 is combined to adjust the position of the first frequency band in the LB frequency band, and the second adjustment circuit T2 adjusts the position of the second frequency band in the MHB+UHB frequency band, so that the frequency band that can be covered by the antenna module 100 is increased, so as to improve the full-band coverage of the low frequency band, medium and high frequency band and ultra-high frequency band of the mobile communication signal, which can not only ensure the CA / ENDC of the LB+MHB+UHB frequency band, but also further achieve the UHB-N78 frequency band dual-band wideband (3300~4100MHz) coverage.

[0162] The antenna module 100 provided in the embodiment of the present application is configured by arranging the first feeding system 20 and the second feeding system 40 on the mutually coupled first radiator 11 and the second radiator 12, wherein the excitation current of the first feeding system 20 forms a high-efficiency fundamental mode on the first radiator 11 to receive and transmit electromagnetic wave signals in the first frequency band; the first matching circuit M1 is designed to set the second bandpass circuit 23 for conducting electromagnetic wave signals in the second frequency band (MHB+UHB band), and the second matching circuit M2 is designed to set the mobile communication signals for conducting the second frequency band, so that the excitation current of the feeding system is connected to the ground through the first feeding point A1, and the excitation current of the second feeding system 40 is connected to the ground through the first feeding point A1 to form a specific current path, and also excites The first radiator 11 and the second radiator 12 generate the first resonance mode a, the second resonance mode b, the third resonance mode c and the fourth resonance mode d that support the electromagnetic wave signal of the second frequency band. In combination, the first adjustment circuit T1 and the second adjustment circuit T2 are respectively set on the first matching circuit M1 and the second matching circuit M2 to achieve multi-band wide coverage in the LB band and the MHB+UHB band, and can generate multiple modes in the UHB-N78 band to achieve broadband coverage requirements (3300~4100MHz); the common aperture technology is adopted to improve the antenna space utilization rate, effectively save the internal space of the mobile phone, and facilitate better stacking of the whole machine; through the multiple radiators 10, multi-mode simultaneous operation is realized, the antenna bandwidth is widened, and high isolation of each frequency band is achieved by applying different matching circuit forms.

[0163] The antenna module 100 provided in the second embodiment of the present application is exemplified below with reference to the accompanying drawings.

[0164] See also Fig.31The antenna module 100 provided in this embodiment is based on the antenna module 100 provided in the first embodiment, and the antenna module 100 also includes a third radiator 13. The third radiator 13 is electrically connected to the second matching circuit M2. The third radiator 13 is a flexible circuit board radiator, a laser direct forming radiator, or a printed direct forming radiator. The third radiator 13 is used to send and receive electromagnetic wave signals in a fourth frequency band under the excitation of the second feeding system 40, and the fourth frequency band range is within the second frequency band range. Among them, the fourth frequency band is a UHB frequency band. Specifically, the effective electrical length of the third radiator 13 corresponds to the UHB band, so that the third radiator 13 can generate at least one mode in the UHB band, and then combined with the second feeding system 40 to excite the first radiator 11 and the second radiator 12 to generate at least one mode in the N78 band, so that the antenna module 100 generates at least two modes in the UHB band, and the resonant frequencies of the at least two modes have a certain interval to form a wide coverage in the UHB band, thereby improving the coverage of the antenna module 100 in the UHB band. Combined with the entire antenna module 100, by adding the third radiator 13 and feeding it together with the second radiator 12, there is no need to add a new signal source, and it can further provide coverage for the MHB+UHB band. According to the above design ideas, full-band coverage of the MHB+UHB band can be achieved.

[0165] Optionally, the fourth frequency band may be an N78 frequency band. This embodiment is applied to the antenna module 100 provided in the first embodiment, and the addition of the third radiator 13 may enable the second feeding system 40 to excite the three resonance modes generated by the first radiator 11 and the second radiator 12 in the N78 frequency band, further increasing the coverage of the N78 frequency band.

[0166] Of course, this embodiment can be applied to an antenna module that is not equipped with the first bandpass circuit 41. The third radiator 13 combined with the second feeding system 40 excites the first radiator 11 and the second radiator 12 to generate two resonant modes in the N78 frequency band, thereby increasing the coverage of the N78 frequency band.

[0167] As for the antenna form of the third radiator 13, the antenna form of the third radiator 13 may be the same as or different from the antenna forms of the first radiator 11 and the second radiator 12. For example, the first radiator 11 and the second radiator 12 are the metal frame 310 antennas, and the third radiator 13 may be arranged in the housing 300. On the one hand, it is convenient to be close to the second signal source 31, reduce the feeding path, and avoid mutual interference with the installation position of the second radiator 12. On the other hand, since the frequency band supported by the third radiator 13 is relatively high, the size of the third radiator 13 is relatively reduced, so the space occupied by the third radiator 13 in the housing 300 is relatively small. Further, the third radiator 13 may be in the form of FPC (flexible printed circuit) or LDS (laser direct structuring), but not limited to these two forms, so that the thickness of the third radiator 13 is relatively small, thin, and flexible, so as to be arranged in a small space or curved space in the housing 300, thereby improving the compactness of the devices in the electronic device 1000.

[0168] For further information, see Fig.32 The antenna module 100 further includes a third matching circuit M3. The third matching circuit M3 is electrically connected between the second matching circuit M2 and the second signal source 31. The third matching circuit M3 is used to tune the resonant frequency and bandwidth of the electromagnetic wave signal in the fourth frequency band.

[0169] See also Fig.33 The equivalent antenna form of the second signal source 31 obtained by the second radiator 12 and the third radiator 13 under the excitation of the second feeding system 40 is as follows: Fig.33 shown.

[0170] See also Fig.34 , Fig.34 It is an S parameter curve diagram of setting the third radiator 13 in the antenna module without the first bandpass circuit 41. The second signal source 31 excites the third radiator 13 to generate the fifth resonance mode j through the third matching circuit M3 and the second matching circuit M2. Among them, the fifth resonance mode j includes the 1 / 4 wavelength mode of the third radiator 13. The first resonance mode a, the second resonance mode b, the third resonance mode c and the fifth resonance mode j form four resonance modes to achieve full frequency band coverage of the antenna module 100 in the MHB+UHB frequency band. Of course, setting the third radiator 13 in the antenna module with the first bandpass circuit 41 can generate at least five resonance modes, which are not shown in the figure here.

[0171] The present application does not specifically limit the structure of the third matching circuit M3, and several implementations are used as examples below. Of course, the specific structure of the third matching circuit M3 includes but is not limited to the following implementations.

[0172] In an alternative implementation, see Fig.35 The third matching circuit M3 includes a twelfth capacitor C12. One end of the twelfth capacitor C12 is electrically connected to the second signal source 31, and the other end of the twelfth capacitor C12 is electrically connected to the third radiator 13.

[0173] In another optional implementation, please refer to Fig.36 The third matching circuit M3 includes a twelfth capacitor C12 and a thirteenth capacitor C13. One end of the twelfth capacitor C12 is electrically connected to the second signal source 31, the other end of the twelfth capacitor C12 is electrically connected to the third radiator 13 and one end of the thirteenth capacitor C13, and the other end of the thirteenth capacitor C13 is electrically connected to the reference ground GND.

[0174] In another optional implementation, please refer to Fig.37 The third matching circuit M3 includes a twelfth capacitor C12 and the tenth inductor L10. One end of the twelfth capacitor C12 is electrically connected to the second signal source 31, the other end of the twelfth capacitor C12 is electrically connected to the third radiator 13 and one end of the tenth inductor L10, and the other end of the tenth inductor L10 is electrically connected to the reference ground GND.

[0175] The third matching circuit M3 provided in the above embodiments can achieve tuning of the resonant frequency and bandwidth of the electromagnetic wave signal in the fourth frequency band. Of course, in other embodiments, other resonant elements may be added, including capacitors or inductors.

[0176] See also Fig.38 , Fig.38It is an efficiency diagram of the antenna module 100 provided in an embodiment of the present application. S03 and S04 are efficiency curves of the third radiator 13 and the third radiator 13 not being provided, respectively. At the first point of curve S03 and the second point of curve S04, the efficiency is around 3.95 GHz. The efficiency of the antenna module 100 provided with the third radiator 13 at around 3.95 GHz is greater than the efficiency of the antenna module 100 without the third radiator 13 at around 3.95 GHz. Moreover, the efficiency of the antenna module 100 provided with the third radiator 13 in the frequency band of 3300 to 4100 MHz is greater than the efficiency of the antenna module 100 without the third radiator 13 in the frequency band of 3300 to 4100 MHz. In other words, the bandwidth increases after the third radiator 13 is provided, and the efficiency in the frequency band of 3300 to 4100 MHz increases.

[0177] The antenna module 100 provided in the embodiment of the present application is configured by arranging the first feeding system 20 and the second feeding system 40 on the mutually coupled first radiator 11 and the second radiator 12, wherein the excitation current of the first feeding system 20 forms a high-efficiency fundamental mode on the first radiator 11 to receive and transmit electromagnetic wave signals in the first frequency band; the first matching circuit M1 is designed to set the second bandpass circuit 23 for conducting electromagnetic wave signals in the second frequency band (MHB+UHB band), and the second matching circuit M2 is designed to set the mobile communication signals for conducting the second frequency band, so that the excitation current of the feeding system is connected to the ground through the first feeding point A1, and the excitation current of the second feeding system 40 is connected to the ground through the first feeding point A1 to form a specific current path, and also excites The first radiator 11 and the second radiator 12 generate the first resonance mode a, the second resonance mode b, the third resonance mode c and the fourth resonance mode d that support the electromagnetic wave signal of the second frequency band. In combination, the first adjustment circuit T1 and the second adjustment circuit T2 are respectively set on the first matching circuit M1 and the second matching circuit M2 to achieve multi-band wide coverage in the LB band + MHB + UHB band, and can generate multiple modes in the UHB-N78 band to achieve broadband coverage requirements (3300~4100MHz); the common aperture technology is adopted to improve the antenna space utilization rate, effectively save the internal space of the mobile phone, and facilitate better stacking of the whole machine; through the multiple radiators 10, multi-mode simultaneous operation is realized, the antenna bandwidth is widened, and high isolation of each frequency band is achieved by applying different matching circuit forms.

[0178] The electronic device 1000 provided in the present application comprises the antenna module 100 described in any one of the above-mentioned embodiments. The antenna module 100 is arranged in the electronic device 1000, and the electronic device 1000 is taken as a mobile phone as an example. The present application does not limit the specific position where the radiator 10 of the antenna module 100 is installed in the electronic device 1000. The radiator 10 of the antenna module 100 is integrated in the shell 300, or is arranged on the surface of the shell 300, or is arranged in the space surrounded by the shell 300. The first feeding system 20 and the second feeding system 40 are arranged on the circuit board of the electronic device 1000.

[0179] The forming method of the radiator 10 in the electronic device 1000 includes but is not limited to the following embodiments.

[0180] In an optional embodiment, at least part of the radiator 10 is integrated with the frame 310 of the housing 300. Specifically, the housing 300 of the electronic device 1000 has a conductive frame 310 (for example, the metal frame 310). At least part of the first radiator 11 of the antenna module 100 and at least part of the second radiator 12 are integrated with the conductive frame 310. For example, the frame 310 is made of metal. The radiator 10 and the frame 310 are integrated. The coupling gap 113 between the radiators 10 is filled with an insulating material. Of course, in other embodiments, the radiator 10 can also be integrated with the back cover 320. In other words, the radiator 10 is integrated as a part of the housing 300.

[0181] In another optional embodiment, the radiator 10 is formed on the surface of the frame 310 (for example, the inner surface or outer surface of the frame 310). Specifically, the basic form of the radiator 10 includes but is not limited to patching the radiator 10, forming it on the inner surface of the frame 310 by laser direct structuring (LDS) and print direct structuring (PDS). In this embodiment, the material of the frame 310 can be a non-conductive material (non-shielding material for electromagnetic wave signals). Of course, the radiator 10 can also be arranged on the surface of the back cover 320.

[0182] In another optional embodiment, the radiator 10 is disposed on a flexible circuit board, a hard circuit board or other supporting board. The radiator 10 can be integrated on a flexible circuit board, and the flexible circuit board is attached to the inner surface of the middle frame 340 by adhesive or the like. In this embodiment, the material of the portion of the frame 310 corresponding to the radiator 10 can be a non-conductive material. Of course, the radiator 10 can also be disposed on the inner surface of the back cover 320.

[0183] In this embodiment, please refer to Fig.39 , the first radiator 11 is integrated with the metal frame 310, and the second radiator 12 is integrated with the metal frame 310. By setting the spatial reuse of the first radiator 11, the second radiator 12 and the frame 310, the occupied space is reduced. The third radiator 13 of the antenna module 100 is located in the shell 300. The third radiator 13 of the antenna module 100 is integrated in a flexible circuit board, or directly formed in the shell 300 by laser, or directly formed in the shell 300 by printing, so that the third radiator 13 is close to the second feeding system 40.

[0184] By setting the first radiator 11 and the second radiator 12 as the metal frame 310 antenna, the third radiator 13 is integrated into a flexible circuit board, or directly formed in the housing 300 by laser, or directly formed in the housing 300 by printing, on the one hand, it is convenient for the third radiator 13 to be close to the second signal source 31, reducing the feeding path, and avoiding the interference between the installation positions of the third radiator 13 and the second radiator 12. On the other hand, since the frequency band supported by the third radiator 13 is relatively high, the size of the third radiator 13 is relatively reduced, so the space occupied by the third radiator 13 in the housing 300 is relatively small. Further, the third radiator 13 is integrated into a flexible circuit board, or directly formed in the housing 300 by laser, or directly formed in the housing 300 by printing, so that the thickness of the third radiator 13 is relatively small, thin, and flexible, so as to be arranged in a narrow space or curved space in the housing 300, thereby improving the compactness of the devices in the electronic device 1000.

[0185] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An antenna module, characterized in that: include: A radiator, comprising a first radiator and a second radiator, wherein the first radiator has a first grounding end, a first coupling end, a first feeding point and a first connection point located between the first grounding end and the first coupling end, wherein the first connection point is located between the first feeding point and the first coupling end, and the second radiator has a second coupling end, a second grounding end and a second feeding point located between the second coupling end and the second grounding end, wherein a coupling gap is provided between the first coupling end and the second coupling end, and both the first grounding end and the second grounding end are electrically connected to a reference ground; A first feeding system, electrically connected to the first feeding point, for exciting the radiator to transmit and receive electromagnetic wave signals in a first frequency band; a second feeding system, electrically connected to the second feeding point, and used to excite the radiator to transmit and receive electromagnetic wave signals in a second frequency band, wherein the minimum frequency of the second frequency band is greater than the maximum frequency of the first frequency band; and A first bandpass circuit is electrically connected between the first connection point and the reference ground, the first bandpass circuit is used to conduct the electromagnetic wave signal of the third frequency band to the reference ground, and the first bandpass circuit is a low impedance to the ground for the third frequency band, wherein the third frequency band is within the range of the second frequency band, so that the second feeding system excites the radiator to support at least two resonance modes in the third frequency band; The radiator supports a third resonance mode and a fourth resonance mode under the excitation of the second feeding system, and the current of the third resonance mode is distributed at least between the second coupling end and the second feeding point; the current of the fourth resonance mode is distributed at least between the first connection point to the first coupling end and between the second coupling end and the second feeding point, wherein the third resonance mode and the fourth resonance mode cover the third frequency band; the electromagnetic wave signal of the third frequency band includes a mobile communication signal with a frequency greater than or equal to 3000MHz and less than or equal to 6000MHz.

2. The antenna module according to claim 1, characterized in that: The first radiator further has a second connection point, and the second connection point is located at the first feeding point or between the first connection point and the first feeding point; The antenna module also includes a second bandpass circuit, which is electrically connected between the second connection point and the reference ground, and is used to conduct the electromagnetic wave signal of the second frequency band to the reference ground.

3. The antenna module according to claim 2, characterized in that: The radiator supports a first resonance mode and a second resonance mode under the excitation of the second feeding system, wherein the current of the first resonance mode is distributed at least between the second coupling end and the second ground end; and the current of the second resonance mode is distributed at least between the second connection point and the first coupling end and between the second coupling end and the second feeding point.

4. The antenna module according to claim 3, characterized in that: The first resonance mode includes a 1 / 4 wavelength mode from the second coupling end to the second ground end of the second radiator; the second resonance mode includes a 1 / 4 wavelength mode between the second connection point and the first coupling end of the first radiator; the third resonance mode includes a 1 / 4 wavelength mode between the second coupling end and the second feeding point of the second radiator; the fourth resonance mode includes a 1 / 4 wavelength mode between the first connection point and the first coupling end of the first radiator.

5. The antenna module according to claim 1, wherein: The electromagnetic wave signal of the first frequency band includes at least one of a GPS-L5 signal and a mobile communication signal with a frequency less than 1000 MHz; the electromagnetic wave signal of the second frequency band includes a mobile communication signal with a frequency greater than or equal to 1000 MHz and less than or equal to 6000 MHz, wherein the mobile communication signal includes at least one of a 4G mobile communication signal and / or a 5G mobile communication signal.

6. The antenna module according to claim 1, characterized in that: The first bandpass circuit includes a first capacitor and a first inductor, one end of the first capacitor is electrically connected to the first connection point, the other end of the first capacitor is electrically connected to one end of the first inductor, and the other end of the first inductor is electrically connected to the reference ground; or, The first band-pass circuit includes a second capacitor, a second inductor and a third inductor, one end of the second capacitor and one end of the second inductor are both electrically connected to the first connection point, the other end of the second capacitor is electrically connected to one end of the second inductor, and the other end of the second inductor and the other end of the third inductor are both electrically connected to the reference ground.

7. The antenna module according to claim 2, characterized in that: The second band-pass circuit includes a third capacitor and a fourth inductor, one end of the third capacitor is electrically connected to the second connection point, the other end of the third capacitor is electrically connected to one end of the fourth inductor, and the other end of the fourth inductor is electrically connected to the reference ground.

8. The antenna module according to claim 2, characterized in that: The first feeding system includes a first matching circuit and a first signal source electrically connected to one end of the first matching circuit, and the other end of the first matching circuit is electrically connected to the first feeding point; The second band-pass circuit is electrically connected between the first feeding point and the reference ground, and the second band-pass circuit is a part of the first matching circuit.

9. The antenna module according to claim 8, characterized in that: The antenna module also includes a first adjustment circuit, one end of which is electrically connected to the first radiator, and the other end of which is electrically connected to the reference ground. The first adjustment circuit includes a variable capacitor and at least one of a plurality of switch selection circuits, wherein the switch selection circuit includes at least one of a combination of a switch and an inductor, a combination of a switch and a capacitor, and a combination of a switch and an inductor and a capacitor; the first adjustment circuit is used to adjust the first frequency band.

10. The antenna module according to claim 9, characterized in that: The first adjustment circuit is a part of the first matching circuit.

11. The antenna module according to claim 8, characterized in that: The first matching circuit also includes a first tuning circuit, one end of the first tuning circuit is electrically connected to the first feeding point, the other end of the first tuning circuit is electrically connected to the first signal source, and the first tuning circuit is used to tune the electromagnetic wave signal in the first frequency band.

12. The antenna module according to claim 11, characterized in that: The first tuning circuit includes a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a fifth inductor and a sixth inductor, one end of the fourth capacitor is electrically connected to the first feeding point, the other end of the fourth capacitor is electrically connected to one end of the fifth capacitor, the other end of the fifth capacitor is electrically connected to one end of the sixth capacitor, one end of the fifth inductor and one end of the sixth inductor, the other end of the sixth capacitor is electrically connected to the reference ground, the other end of the fifth inductor is electrically connected to the reference ground, the other end of the sixth inductor is electrically connected to the first signal source and one end of the seventh capacitor, and the other end of the seventh capacitor is electrically connected to the reference ground.

13. The antenna module according to any one of claims 1 to 12, characterized in that: The second feeding system includes a second matching circuit and a second signal source electrically connected to one end of the second matching circuit, and the other end of the second matching circuit is electrically connected to the second feeding point; The second matching circuit includes a seventh inductor, an eighth inductor, a ninth inductor, an eighth capacitor, a ninth capacitor, a tenth capacitor and an eleventh capacitor, one end of the seventh inductor is electrically connected to the second feeding point, the other end of the seventh inductor is electrically connected to one end of the eighth inductor, one end of the eighth capacitor and one end of the ninth capacitor, the other end of the eighth inductor and the other end of the eighth capacitor are both electrically connected to the reference ground, the other end of the ninth capacitor is electrically connected to one end of the tenth capacitor, the other end of the tenth capacitor is electrically connected to one end of the ninth inductor and one end of the second signal source, the other end of the ninth inductor is electrically connected to one end of the eleventh capacitor, and the other end of the eleventh capacitor is electrically connected to the reference ground.

14. The antenna module according to claim 13, characterized in that: The antenna module also includes a second adjustment circuit having one end electrically connected to the reference ground, the other end of the second adjustment circuit electrically connected to the second radiator or electrically connected to the second matching circuit, and the second adjustment circuit is used to adjust the third frequency band.

15. The antenna module according to claim 13, characterized in that: The antenna module also includes a third radiator, which is electrically connected to the second matching circuit; the third radiator is a flexible circuit board radiator, a laser direct forming radiator, or a printed radiator, and the third radiator is used to send and receive electromagnetic wave signals in a fourth frequency band under the excitation of the second feeding system, and the fourth frequency band range is within the second frequency band range.

16. The antenna module according to claim 15, characterized in that: The antenna module further includes a third matching circuit, one end of the third matching circuit is electrically connected between the second matching circuit and the second signal source, and the other end of the third matching circuit is electrically connected to the third radiator; The third matching circuit comprises a twelfth capacitor, one end of the twelfth capacitor is electrically connected to the second signal source, and the other end of the twelfth capacitor is electrically connected to the third radiator; or, The third matching circuit includes a twelfth capacitor and a thirteenth capacitor, one end of the twelfth capacitor is electrically connected to the second signal source, the other end of the twelfth capacitor is electrically connected to the third radiator and one end of the thirteenth capacitor, and the other end of the thirteenth capacitor is electrically connected to the reference ground; or, The third matching circuit includes a twelfth capacitor and a tenth inductor, one end of the twelfth capacitor is electrically connected to the second signal source, the other end of the twelfth capacitor is electrically connected to the third radiator and one end of the tenth inductor, and the other end of the tenth inductor is electrically connected to the reference ground.

17. An electronic device, characterized in that: Comprising the antenna module as described in any one of claims 1 to 16.

18. The electronic device according to claim 17, characterized in that: The electronic device further comprises a housing having a conductive frame, and at least a portion of the first radiator and at least a portion of the second radiator of the antenna module are integrated with the conductive frame.

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