CN117673754A

CN117673754A - Antenna assembly and electronic equipment

Info

Publication number: CN117673754A
Application number: CN202211042589.2A
Authority: CN
Inventors: 孔德振; 呼延思雷; 闫鑫
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2024-03-08
Also published as: WO2024045965A1

Abstract

The application discloses an antenna assembly and electronic equipment relates to the technical field of communication. An antenna assembly, comprising: the first radiator is provided with a first end, a second end and a first feeding point, the first feeding point is positioned between the first end and the second end, the first feeding point is used for receiving a first excitation signal, the first excitation signal excites the first radiator to generate a first resonance mode, a second resonance mode and a third resonance mode, and the first resonance mode, the second resonance mode and the third resonance mode are all used for supporting a low-frequency LB frequency band, so that more resonance modes can be used for supporting the LB frequency band in the antenna assembly, the frequency of the first LB frequency band is larger than that of the third LB frequency band, and the frequency of the third LB frequency band is larger than that of the second LB frequency band. Therefore, the bandwidth of the antenna component is larger, and better communication performance is achieved.

Description

Antenna assembly and electronic equipment

Technical Field

The application relates to the technical field of communication, in particular to an antenna assembly and electronic equipment.

Background

With the development of technology, electronic devices such as mobile phones with communication functions have become more and more popular and more powerful. An antenna assembly is typically included in an electronic device to enable communication functions of the electronic device. However, the communication performance of the antenna assembly in the electronic device in the related art is not good enough, and there is room for improvement.

Disclosure of Invention

The application provides an antenna assembly, comprising:

the first radiator is provided with a first end, a second end and a first feeding point, the first feeding point is located between the first end and the second end, the first feeding point is used for receiving a first excitation signal, the first excitation signal excites the first radiator to generate a first resonance mode, a second resonance mode and a third resonance mode, the first resonance mode, the second resonance mode and the third resonance mode are all used for supporting a low-frequency LB frequency band, the first resonance mode is used for supporting a first low-frequency LB frequency band, the second resonance mode is used for supporting a second LB frequency band, the third resonance mode is used for supporting a third LB frequency band, the frequency of the first LB frequency band is larger than the frequency of the third LB frequency band, and the frequency of the third LB frequency band is larger than the frequency of the second LB frequency band.

The application provides an antenna assembly, comprising:

the first radiator is provided with a first end, a second end and a first feeding point, wherein the first feeding point is positioned between the first end and the second end, the first feeding point is used for receiving a first excitation signal, and the first excitation signal is used for exciting the first radiator to generate a first resonance mode, a second resonance mode and a third resonance mode; and

The first frequency selection circuit is arranged at the second end and is electrically connected with the first radiator, and the first frequency selection circuit can be configured to control the first excitation signal to excite the first radiator so as to switch among the first resonance mode, the second resonance mode and the third resonance mode, so that the first radiator can generate the first resonance mode and the second resonance mode at the same time, or the first radiator can generate only the third resonance mode, or the first radiator can generate a mixed mode of the first resonance mode and the third resonance mode.

The application provides an electronic device, the electronic device includes:

the first radiator is provided with a first end, a second end and a first feeding point, wherein the first feeding point is positioned between the first end and the second end and is used for receiving a first excitation signal; and

the first frequency selection circuit is arranged at the second end and is electrically connected with the first radiator, the first frequency selection circuit can be configured to control the first excitation signal to excite the first radiator to generate one of a first resonance mode, a second resonance mode and a third resonance mode, the first frequency selection circuit can be configured to control the first excitation signal to excite the first radiator so as to switch between two modes of the first resonance mode, the second resonance mode and the third resonance mode, and the first resonance mode, the second resonance mode and the third resonance mode are all used for supporting a low-frequency LB frequency band;

The second radiator is provided with a first frequency selection point, a third end, a first grounding point and a second feeding point, the first grounding point is grounded, the first grounding point is arranged away from the second end compared with the third end, the second feeding point is positioned between the third end and the first grounding point, the first frequency selection point is positioned between the third end and the first grounding point, and the second feeding point is used for receiving a second excitation signal;

the first parasitic branch is arranged between the second end and the third end, one end of the first parasitic branch forms a first gap with the first radiator, and the other end of the first parasitic branch forms a second gap with the second radiator and is capacitively coupled;

a first circuit board for generating the first excitation signal; and

and the second circuit board is used for generating the second excitation signal.

By adopting the technical scheme, the beneficial effects that have are: in the antenna assembly, the first excitation signal excites the first radiator to generate a first resonant mode, a second resonant mode and a third resonant mode, wherein the first resonant mode, the second resonant mode and the third resonant mode are all used for supporting a low-frequency LB frequency band, so that more resonant modes can be used for supporting the LB frequency band in the antenna assembly, the first resonant mode is used for supporting the first low-frequency LB frequency band, the second resonant mode is used for supporting the second LB frequency band, the third resonant mode is used for supporting the third LB frequency band, the frequency of the first LB frequency band is greater than that of the third LB frequency band, and the frequency of the third LB frequency band is greater than that of the second LB frequency band. Therefore, the bandwidth of the antenna component is larger, and better communication performance is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

FIG. 2 is an exploded view of the electronic device of the embodiment of FIG. 1 from a perspective;

FIG. 3 is an exploded view of the electronic device of the embodiment of FIG. 1 from another perspective;

FIG. 4 is a schematic diagram of an antenna assembly according to the embodiment shown in FIG. 3;

FIG. 5 is a schematic diagram of main current flow directions corresponding to a first resonant mode and a second resonant mode of the first radiator in the embodiment shown in FIG. 4;

FIG. 6 is a schematic diagram illustrating main current flow corresponding to a third resonant mode of the first radiator in the embodiment shown in FIG. 4;

fig. 7 is a schematic structural diagram of the first matching circuit and the first feed source in the embodiment shown in fig. 4;

fig. 8 is a schematic diagram of the structure of the first frequency selective circuit in the antenna assembly in the embodiment shown in fig. 4;

Fig. 9 is a schematic diagram of the structure of the first frequency selection circuit in another embodiment of the antenna assembly in the embodiment shown in fig. 8;

fig. 10 is a schematic structural diagram of the antenna assembly shown in fig. 3 in another embodiment;

FIG. 11 is a schematic diagram of a configuration of a second matching circuit in cooperation with a second feed in the embodiment shown in FIG. 10;

fig. 12 is a schematic diagram of the structure of the second frequency selective circuit in the antenna assembly in the embodiment shown in fig. 10;

fig. 13 is a schematic diagram of a structure of a second frequency selective circuit in another embodiment of the antenna assembly in the embodiment shown in fig. 12;

fig. 14 is a schematic view of the antenna assembly of fig. 10 in another embodiment;

fig. 15 is a schematic diagram of the structure of the third frequency selective circuit in the antenna assembly in the embodiment shown in fig. 14;

fig. 16 is a schematic diagram of the third frequency selective circuit in another embodiment of the antenna assembly in the embodiment shown in fig. 15;

fig. 17 is a schematic diagram of the antenna assembly shown in fig. 10 in another embodiment;

fig. 18 is a schematic diagram of a structure of the first frequency selection circuit shown in fig. 17 in another embodiment of an antenna assembly;

fig. 19 is a graph comparing performance of a second radiator in the antenna assembly of fig. 10 in one embodiment;

FIG. 20 is a schematic diagram of the matching of the inductance and SAR sensors in an embodiment of the present disclosure;

Fig. 21 is a schematic view of an antenna assembly according to another embodiment of the present application;

fig. 22 is a schematic structural diagram of an antenna assembly according to another embodiment of the present disclosure;

fig. 23 is a schematic diagram of main current flow corresponding to the eighth resonant mode in the antenna assembly shown in fig. 22;

fig. 24 is a schematic diagram of main current flow corresponding to the ninth resonant mode in the antenna assembly shown in fig. 22;

fig. 25 is a schematic view of an antenna assembly according to another embodiment of the present disclosure;

fig. 26 is an equivalent circuit schematic diagram of an antenna assembly according to an embodiment of the present disclosure;

fig. 27 is an equivalent circuit schematic diagram of an antenna assembly according to another embodiment of the present disclosure;

fig. 28 is a schematic circuit diagram of the antenna assembly of fig. 27 applied to an electronic device;

FIG. 29 is a schematic view of the spacing between the first radiator and the second radiator in the antenna assembly of the embodiment shown in FIG. 10;

FIG. 30 is a schematic diagram illustrating a structure of the electronic device shown in FIG. 1 in another embodiment of the present application;

FIG. 31 is a schematic view of the middle frame and circuit board assembly of FIG. 30;

FIG. 32 is a schematic diagram of an electronic device according to another embodiment of the present application;

FIG. 33 is a schematic diagram of the middle frame and the first circuit board in FIG. 31;

Fig. 34 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The present application is described in further detail below with reference to the drawings and the embodiments. It is specifically noted that the following embodiments are merely for illustrating the present application, but do not limit the scope of the present application. Likewise, the following embodiments are only some, but not all, of the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

The application provides an electronic device. The electronic device may include, but is not limited to, a device capable of transmitting and receiving electromagnetic wave signals for a mobile phone, a telephone, a television, a tablet personal computer (Pad), a camera, a personal computer, a notebook computer (Personal Computer, PC), a vehicle-mounted device, an earphone, a wristwatch, a wearable device, a base station, a vehicle-mounted radar, a customer premise equipment (Customer Premise Equipment, CPE), and the like.

As used herein, "electronic equipment" (which may also be referred to as a "terminal" or "mobile terminal" or "electronic device") includes, but is not limited to, devices configured to receive/transmit communication signals via a wireline connection, such as via a public-switched telephone network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface, such as for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal. A communication terminal configured to communicate through a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellites or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a PDA that can include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. The mobile phone is the electronic equipment provided with the cellular communication module. In this application, an electronic device is taken as an example of a mobile phone, and other devices can refer to the specific description in this application. Further, the electronic device may be, but is not limited to being, a device with or without a display screen.

Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application, fig. 2 is an exploded schematic diagram of the electronic device according to an embodiment of fig. 1 under a view angle, and fig. 3 is an exploded schematic diagram of the electronic device according to an embodiment of fig. 1 under another view angle. The electronic device 100 may include a device body 10 and an antenna assembly 40 mounted on the device body 10. The device body 10 is used for carrying an antenna assembly 40. The antenna assembly 40 is used for receiving and transmitting electromagnetic wave signals to realize the communication function of the electronic device 100. It will be appreciated that the location of the antenna assembly 40 on the electronic device 100 may not be particularly limited.

Referring to fig. 1, 2 and 3, with reference to the view angle of the electronic device 100 in fig. 1, in the cartesian coordinate system, the width direction of the electronic device 100 is defined as the X-axis direction, that is, the side of the electronic device 100 in the width direction is the short side, and the short side extends in the X-axis direction. The longitudinal direction of the electronic device 100 is defined as the Y-axis direction, that is, the sides of the electronic device 100 in the longitudinal direction are long sides, and the long sides are provided extending in the Y-axis direction. The thickness direction of the electronic device 100 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, and the direction indicated by the arrow is the positive direction.

The device body 10 may include, but is not limited to, a display 11 and a housing 12 that are connected to each other in a covering manner. The housing 12 is provided with a housing space 101, and the antenna assembly 40 can be mounted in the housing space 101. Of course, the mating relationship of the housing 12 and the antenna assembly 40 may also be: the antenna assembly 40 is partially integrated with the housing 12 or partially disposed outside the housing 12.

In one embodiment, the housing 12 may include a center frame 121 for carrying the display screen 11, the antenna assembly 40, and a rear housing 122 disposed opposite the display screen 11 and coupled to the center frame 121. The rear case 122 is located on a side of the middle frame 121 remote from the display screen 11.

The middle frame 121 may be formed of plastic, glass, ceramic, fiber composite, metal, or the like. The middle frame 121 may include a main body 1211 interposed between the display 11 and the rear case 122, and a frame 1212 disposed at a periphery of the main body 1211. The frame 1212 may be connected to the display 11 and the rear case 122. In some embodiments, the bezel portion 1212 may be integrally formed with the rear housing 122. In some embodiments, the body portion 1211 is of unitary construction with the bezel portion 1212.

The frame portion 1212 may include a first edge 1213, a second edge 1214, a third edge 1215, and a fourth edge 1216. First edge 1213, second edge 1214, third edge 1215, and fourth edge 1216 are connected end to end. The first side 1213 is disposed opposite the third side 1215. The second side 1214 is disposed opposite the fourth side 1216. In some embodiments, first edge 1213 and third edge 1215 are long edges, and second edge 1214 and fourth edge 1216 are short edges. It will be appreciated that the length of the long side is longer than the length of the short side.

It can be appreciated that the electronic device 100 may further include a circuit board 13, a battery, a functional device (the functional device may include one or more of a camera module 14, a microphone, a receiver, a speaker, a face recognition module, and a fingerprint recognition module) and the like disposed in the accommodating space 101, which are not described herein. In addition, the above description of the electronic device 100 is merely an illustration of the environment in which the antenna assembly 40 is used, and should not be construed as limiting the antenna assembly 40.

The antenna assembly 40 may be a hybrid of one or more of a flexible circuit board (Flexible Printed Circuit, FPC) antenna, a laser direct structuring (Laser Direct Structuring, LDS) antenna, a printed direct structuring (Print Direct Structuring, PDS) antenna, a metal bezel antenna (also known as a metal stub antenna). Of course, the antenna assembly 40 may be other types of antennas, which will not be described in detail.

The antenna assembly 40 itself has a reference ground, also referred to as ground pole or ground. Specific forms of the reference ground include, but are not limited to, a metal conductive plate, a metal conductive layer molded into the interior of a flexible circuit board, in a rigid circuit board, and the like. When the antenna assembly 40 is disposed within the electronic device 100, the reference of the antenna assembly 40 is electrically connected to the reference ground of the electronic device 100. In some embodiments, the antenna assembly 40 itself may not have a reference ground, and the antenna assembly 40 is electrically connected to the reference ground of the electronic device 100 or the reference ground of the electronics within the electronic device 100, either by direct electrical connection or indirectly through a conductive member.

Referring to fig. 4, fig. 4 is a schematic structural diagram of an antenna assembly 40 in an embodiment of the embodiment shown in fig. 3. The antenna assembly 40 may include a first radiator 50 and a first feed S1 electrically connected to the first radiator 50. The first feed S1 may generate a first excitation signal that is transmitted to the first radiator 50. Further, the antenna assembly 40 may excite the first radiator 50 by the first excitation signal to generate a plurality of resonant modes supporting a low frequency (Low Frequency Band, LB) band, a medium high frequency (Middle Frequency Band and High Frequency Band, MHB) band.

It is understood that the LB frequency band may range from 703MHz to 960MHz. The MHB band may have a band range of 1710MHz to 2690MHz. The MHB frequency band generally includes an intermediate frequency (Middle Frequency band, MB) band and a high frequency (High Frequency Band, HB) band. The MB frequency band may have a frequency band ranging from 1710MHz to 2170MHz. The HB frequency band can range from 2300MHz to 2690MHz. The frequency ranges listed here may not be fixed, and the range may be enlarged based on a predetermined frequency range.

The terms "first," "second," "third," and the like in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", "a third", etc. may include at least one such feature, either explicitly or implicitly.

The first radiator 50 may be, but is not limited to being, an LDS radiator, or an FPC radiator, or a PDS radiator, or a metal branch radiator. In some embodiments, the first radiator 50 may be a structural antenna (Mechanical Design Antenna, MDA) radiator designed with the electronic device 100 itself embedded in metal. For example, the first radiator 50 may be an antenna radiator designed by using a middle frame 121 formed by plastic and metal of the electronic device 100. In addition, the first radiator 50 may be a metal branch antenna radiator designed for the metal middle frame 121.

The shape, structure and material of the first radiator 50 are not particularly limited, and the shape of the first radiator 50 includes, but is not limited to, a bent shape, a strip shape, a sheet shape, a rod shape, a coating, a film, etc. When the first radiator 50 is in a strip shape, the extending track of the first radiator 50 is not limited, so the first radiator 50 can be in a linear, curved, multi-section bent track extension. The first radiator 50 may be a line with a uniform width on the extended track, or may be a bar with a gradual width change and a widening area with an unequal width.

The first radiator 50 has a first end 51, a second end 52 available for grounding, and a first feeding point P1. The second end 52 is electrically connected to ground by, but not limited to, direct electrical connection (e.g., soldering), or indirect electrical connection via coaxial lines, microstrip lines, rf lines, conductive clips, conductive adhesives, insert metals, or a center-frame connection of the electronic device 100. The first feeding point P1 is located between the first end 51 and the second end 52, and a specific position of the first feeding point P1 on the first radiator 50 may not be limited. The first feeding point P1 may receive a first excitation signal. That is, the first feeding point P1 may be directly or indirectly electrically connected to the first feed source S1.

In some embodiments, two ends of the first radiator 50, such as the first end 51 and the second end 52, may each have a gap between the other components. In some scenarios, when the antenna assembly 40 is applied in the electronic device 100, the first end 51 and the second end 52 of the first radiator 50 may not be easily held or blocked at the same time with gaps (i.e., two gaps) respectively provided between other components in the electronic device 100. Even when one of the two slots is blocked, the first radiator 50 can transmit and receive electromagnetic wave signals, and thus the antenna assembly 40 has good communication performance.

In some embodiments, the first radiator 50 may be formed on the middle frame 121, for example, the frame portion 1212. In some embodiments, the first radiator 50 may be formed with a middle frame 121, e.g., body portion 1211, a rim portion 1212, e.g., ground. The ground electrode is connected to the main body 1211 by a connecting material between the main body 1211 and the frame 1212, so as to be grounded.

Referring to fig. 4, the first radiator 50 may be bent. The first end 51 and the second end 52 may not be opposed in a straight direction. The first end 51 and the second end 52 may be both ends of the first radiator 50. In other embodiments, the first end 51 and the second end 52 may be opposite ends of the first radiator 50 having a linear shape.

The first radiator 50 may include a first portion 53 and a second portion 54 connected by a bend. The first portion 53 may have a first end 51, the second portion 54 may have a second end 52, and the first feeding point P1 is located at the first portion 53 or the second portion 54 and is disposed adjacent to a corner where the first portion 53 and the second portion 54 are bent and connected.

It will be appreciated that the first radiator 50 is adapted to the form of the electronic device 100 to which the first radiator 50 is applied. The first portion 53 and the second portion 54 may correspond to two sides (e.g., a long side and a short side, which are connected by bending) of the electronic device 100, respectively. In addition, referring to fig. 3 and 4, when the antenna assembly 40 is applied to the electronic device 100, a portion (e.g., one of the first portion 53 and the second portion 54) of the first radiator 50 may be disposed corresponding to a bottom edge (i.e., a short edge extending in the X direction, e.g., a portion of the frame portion 1212 extending in the X direction, i.e., the second edge 1214) of the electronic device 100, and another portion (e.g., the other of the first portion 53 and the second portion 54) may be disposed corresponding to a side edge (i.e., a long edge extending in the Y direction, e.g., a portion of the frame portion 1212 extending in the Y direction, i.e., the first edge 1213) of the electronic device 100. Therefore, when the antenna assembly 40 is applied to the electronic device 100, in a scene where a long holding time is required such as playing a game using the electronic device 100, the gaps between the first end 51 and the second end 52 of the first radiator 50 and other components may not be easily held by the hand of the user or blocked by the hand of the user at the same time. Accordingly, the antenna assembly 40 has anti-hand, excellent two-hand game handedness performance when applied in the electronic device 100.

In some embodiments, if the first radiator 50 is a straight-bar-shaped or straight-bar-like radiator, the first feeding point P1 may be located at a middle portion of the first radiator 50. For example, the equivalent electrical length of the radiating portion between the first feeding point P1 and the first end 51 is equal to or approximately equal to the equivalent electrical length of the radiating portion between the first feeding point P1 and the second end 52 (for example, the difference is less than or equal to 10 mm).

The first excitation signal generated by the first feed source S1 may excite the first radiator 50 to generate a plurality of resonant modes, such as a first resonant mode, a second resonant mode, and a third resonant mode.

In some embodiments, the first resonant mode may be used to support the LB frequency band or the HB frequency band.

It should be noted that, the first resonant mode supports the LB frequency band, which means that the first resonant mode supports a partial frequency band (sub-frequency band) in the LB frequency band, for example, supports a partial frequency band in 703MHz-960MHz, for example, an LTE (long term evolution ) B8 frequency band, for example, an NR (new air interface) N8 frequency band. Accordingly, the first resonance mode supports the HB band, which means that the first resonance mode supports a partial band (sub-band) of the HB band, for example, 2300MHz-2690MHz, for example, NR (new air interface) N41 band. Therefore, when the other resonance mode supports a certain frequency band, only a partial frequency band (sub-frequency band) in this frequency band is supported.

In some embodiments, the first resonant mode may be used to support an LTE LB band or an NR HB band or an NR LB band.

In some embodiments, the first resonant mode may be used to support an LTE B8 band of the LTE LB bands.

In some embodiments, the first resonant mode may be used to support an N8 band in the NR LB band.

In some embodiments, the first resonant mode may be used to support an N41 band of the NR HB band.

Referring to fig. 5, fig. 5 is a schematic diagram illustrating main current flow directions corresponding to the first resonant mode and the second resonant mode of the first radiator 50 in the embodiment shown in fig. 4. The first resonant mode may be an Inverted-F Antenna (IFA) mode. In some embodiments, the current of the first resonant mode may include a current I1 distributed between the first feed point P1 and the first end 51. In some embodiments, the current I1 may flow from the first feed point P1 to the first end 51.

In some embodiments, the first resonant mode may include a 1/4 wavelength mode from the first feed point P1 to the first end 51 such that the first resonant mode supports LB frequency bands such as LTE LB frequency bands, NR LB frequency bands. The 1/4 wavelength mode is a resonance mode with relatively high efficiency, so that the receiving and transmitting efficiency of the frequency band supported by the first resonance mode can be enhanced.

In some embodiments, the first resonant mode may include a 3/4 wavelength mode from the first feed point P1 to the first end 51 such that the first resonant mode supports HB frequency bands such as NR high frequency bands.

In some embodiments, the second resonant mode may be used to support the HB band to widen the bandwidth of the antenna assembly 40.

In some embodiments, the second resonant mode may be used to support the NR high frequency band. In some embodiments, the second resonant mode may be used to support the N41 band in the NR high frequency band.

Referring to fig. 5, the second resonant mode may be a LOOP antenna (LOOP) mode. The current of the second resonant mode may include a current I2 distributed between the first feed point P1 and the second end 52.

In some embodiments, the second resonant mode may include a 1/2 wavelength mode from the first feed point P1 to the second end 52 such that the second resonant mode supports the NR HB band.

In some embodiments, a third resonant mode may be used to support the LB frequency band. In some embodiments, a third resonant mode may be used to support the LTE LB band. In some embodiments, a third resonant mode may be used to support the NR LB band.

In some embodiments, the third resonant mode may be used to support LTE B28 bands in LTE LB bands. In some embodiments, the third resonant mode may be used to support an N28 band in the NR LB band.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating a main current flow corresponding to a third resonant mode of the first radiator 50 in the embodiment shown in fig. 4. The third resonant mode may be a Monopole (Monopole) mode. In some embodiments, the current of the third resonant mode may include a current I31 distributed between the first feeding point P1 and the first terminal 51 and a current I32 distributed between the first feeding point P1 and the second terminal 52. In some embodiments, current I31 flows from the first feed point P1 to the first end 51 and current I32 flows from the first feed point P1 to the second end 52.

In some embodiments, the third resonant mode is a 1/4 wavelength convection mode of the first feeding point P1 to the first end 51 and 1/4 wavelength of the first feeding point P1 to the second end 52. The 1/4 wavelength mode is a resonance mode with relatively high efficiency, so that the receiving and transmitting efficiency of the frequency band supported by the third resonance mode can be enhanced.

In some embodiments, the frequency band supported by the third resonant mode is less than the frequency band supported by the first resonant mode. In other words, the frequency band supported by the first resonance mode is the higher frequency band of the LB frequency band, and the frequency band supported by the second resonance mode is the lower frequency band of the LB frequency band. Therefore, when the first resonant mode and the third resonant mode are used to support the LB frequency band, more resonant modes can be supported in the antenna assembly 40, and the relatively higher frequency band in the LB frequency band and the relatively lower frequency band in the LB frequency band can be fully utilized. Furthermore, the bandwidth of the LB frequency band supported by the antenna assembly 40 is large, and when the antenna assembly 40 performs communication using the LB frequency band, even if the antenna assembly 40 has a frequency offset in the LB frequency band, the frequency after the frequency offset falls within the range of the LB frequency band supported by the antenna assembly 40 due to the large bandwidth of the LB frequency band supported by the antenna assembly 40, so that the antenna assembly 40 has better communication performance.

In some embodiments, the frequency bands supported by the first resonant mode include an LTE B8 frequency band and an N8 frequency band, and the frequency bands supported by the second resonant mode include an LTE B28 frequency band and an N28 frequency band. Further, when the antenna component 40 communicates with other devices, the LTE B8 band, the N28 band, or the LTE B28 band can be fully utilized to communicate with other devices.

It will be appreciated that, for convenience in describing the main characteristic appearance of each resonant mode, the current corresponding to each resonant mode is individually illustrated in the present application. Although each resonant mode is not completely independent of operation. However, the explanation of the principal characteristic appearance of each resonant mode is not affected. The flow of each current is only schematic, and does not represent the actual current intensity, and does not represent the position of the current zero point where two opposite currents act together.

Referring to fig. 4, when the first feed source S1 is directly or indirectly electrically connected to the first radiator 50, for example, the first feeding point P1, the first feed source S1 is generally electrically connected to the first feeding point P1 through a radio frequency signal line. The equivalent resistance of the radio frequency signal line is typically small (about 50 ohms).

The first feeding point P1 is located at the first portion 53 or the second portion 54, and is disposed adjacent to a corner where the first portion 53 and the second portion 54 are bent and connected, so that the first feeding point P1 is located at a portion of the first radiator 50 where the current is strongest or stronger, so that the equivalent impedance of the first radiator 50 is lower, and further the equivalent impedance of the first radiator 50 is relatively matched with the impedance between the first feed source S1 and the first radiator 50, for example, the first feeding point P1. Therefore, the radiation performance of the first radiator 50 is good. It can be appreciated that when the first feeding point P1 is located at the middle of the first radiator 50, the equivalent impedance of the first radiator 50 is low. And the equivalent impedance of the first radiator 50 is matched with the impedance between the radio frequency signal lines connecting the first feed source S1 to the first radiator 50. Therefore, the antenna unit formed by the first feed source S1 and the first radiator 50 in the antenna assembly 40 has better radiation performance.

The first feed source S1 may be electrically connected to the first feed point P1 by, but not limited to, direct electrical connection (such as soldering); or indirectly and electrically connected by means of coaxial lines, microstrip lines, radio frequency lines, conductive elastic sheets, conductive adhesives, matching circuits and the like. In the present embodiment, the first feed S1 is electrically connected to the first feed point P1 through a matching circuit.

Referring to fig. 4, the antenna assembly 40 may further include a first matching circuit 55 having one end electrically connected to the first feed S1 and the other end electrically connected to the first feed P1. The first excitation signal may be transmitted to the first feeding point P1 through the first matching circuit 55.

In some embodiments, the first matching circuit 55 may be comprised of a switch control circuit and/or a load circuit, or may be comprised of an adjustable capacitance (which may also be replaced by a fixed capacitance) and/or an adjustable inductor (which may also be replaced by a fixed capacitance). The first matching circuit 55 can perform impedance matching to improve the antenna performance of the antenna assembly 40.

Referring to fig. 7, fig. 7 is a schematic structural diagram of the first matching circuit 55 matching with the first feed source S1 in the embodiment shown in fig. 4. The first matching circuit 55 may include a first inductor L1 having one end electrically connected to the first feed source S1 and the other end electrically connected to the first feeding point P1, a second inductor L2 having one end electrically connected to the first feeding point P1 and the other end grounded, and a first capacitor C1 having one end electrically connected to the first feed source S1 and the other end grounded. The first inductor L1, the second inductor L2 and the first capacitor C1 cooperate to perform impedance matching, so as to improve the antenna performance of the antenna assembly 40.

Referring to fig. 4, the antenna assembly 40 may further include a first frequency selection circuit 56 having one end electrically connected to the second end 52 and the other end grounded. That is, the second end 52 may be grounded through the first frequency selective circuit 56, rather than being directly grounded. Of course, in some embodiments, the second end 52 may be directly grounded.

The first frequency selection circuit 56 can tune and decouple the LB frequency band, HB frequency band supported by the resonant modes generated by the first radiator 50, such as the first resonant mode, the second resonant mode, and the third resonant mode, to improve the antenna performance.

The first frequency selection circuit 56 may be comprised of a switch control circuit and/or a load circuit, or may be comprised of an adjustable capacitance (which may be replaced by a fixed capacitance) and/or an adjustable inductor (which may be replaced by a fixed capacitance). In an embodiment, the switch control circuit may be a switch chip with a switch function, or may be a single pole multiple throw switch or a single pole single throw switch.

The first frequency selection circuit 56 can control the effective electrical length of the first radiator 50, so as to adjust the frequency band and the resonance frequency point of the electromagnetic wave signal supported by the first radiator 50, so as to further control the first excitation signal to excite the first radiator 50 to operate in the LB frequency band and/or the HB frequency band.

Referring to fig. 8, fig. 8 is a schematic diagram of the structure of the first frequency selection circuit 56 in the antenna assembly 40 in the embodiment shown in fig. 4. The first frequency selection circuit 56 may include at least one first frequency selection sub-circuit 561 and a first switch 562. The first switch 562 has a first common terminal 5621 grounded, a plurality of first connection terminals 5622, and a first switching portion 5623. The first switching portion 5623 may be electrically connected to the first common terminal 5621. The first switching portion 5623 may be electrically connected to one first connection 5622 under control of a control signal (which may be from the electronic device 100, such as a processor, or from other electronic devices). One end of each first frequency selecting sub-circuit 561 is electrically connected to the second end 52, and the other end is electrically connected to one first connection end 5622 in a one-to-one correspondence. The other first connection end 5622 may be directly electrically connected to the second end 52.

It will be appreciated that the connection sequence of the first frequency selection sub-circuit 561 and the first switch 562 in the first frequency selection circuit 56 may be adjusted, for example, the point of the first frequency selection circuit 56 in fig. 8 that is grounded may be directly electrically connected to the second terminal 52, and the corresponding point of the first frequency selection circuit that is electrically connected to the second terminal 52 may be directly grounded.

Referring to fig. 8, the first switching portion 5623 is selectively electrically connected to different first connection ends 5622, so that one end of the different first frequency selecting sub-circuits 561 is electrically connected to the second end 52, and the other end is grounded, or the second end 52 is directly grounded, so that the first radiator 50 has different effective electrical lengths under different states.

In some embodiments, the first switching portion 5623 may be electrically connected to the first connection end 5622 such that the second end 52 is directly grounded such that a resistance between the second end 52 and ground is, for example, 0 ohms, such that the first excitation signal excites the first radiator 50 to generate the first resonant mode and the second resonant mode.

In some embodiments, the first switching portion 5623 may be electrically connected to the first connection end 5622, such that the second end 52 is connected to the first frequency selective sub-circuit 561, and such that the resistance between the second end 52 and the ground is between 0 ohm and a high impedance state, such as an open state, such that the first excitation signal excites the first radiator 50 to generate a mixed mode of the first resonant mode and the third resonant mode (i.e., a mixed mode of IFA and Monopole).

In some embodiments, the first switching portion 5623 may be electrically connected to the first connection end 5622, such that the first frequency selective sub-circuit 561 is connected between the second end 52 and the ground, or the first switching portion 5623 may be in an off state with respect to the first connection end 5622, such that the resistance between the second end 52 and the ground is in a high impedance state, such as an open state, such that the first excitation signal excites the first radiator 50 to generate the third resonance mode.

It should be understood that the first frequency selection circuit 56 in the above embodiment tunes and decouples the LB frequency band and HB frequency band supported by the first radiator 50 in the resonance modes such as the first resonance mode, the second resonance mode and the third resonance mode, but only some embodiments are possible. As long as the first frequency selection circuit 56 can control the first excitation signal to excite the first radiator 50 to switch among the first resonance mode, the second resonance mode, and the third resonance mode, so that the first radiator 50 generates the first resonance mode and the second resonance mode simultaneously, or so that the first radiator 50 generates only the third resonance mode, or so that the first radiator 50 generates a mixed mode of the first resonance mode and the third resonance mode.

Of course, in some embodiments, the second resonant mode above may be referred to as a "fourth resonant mode", and accordingly, the third resonant mode may be referred to as a "second resonant mode", and the mixed mode of the first resonant mode and the third resonant mode may be referred to as a "third resonant mode". Then in this embodiment there is: the first excitation signal excites the first radiator 50 to produce a first resonant mode, a second resonant mode, and a third resonant mode. Further still: the first resonant mode, the second resonant mode and the third resonant mode are all used for supporting the LB frequency band. Further still: the first resonant mode is used for supporting a first low-frequency LB frequency band, the second resonant mode is used for supporting a second LB frequency band, the third resonant mode is used for supporting a third LB frequency band, the frequency of the first LB frequency band is larger than that of the third LB frequency band, and the frequency of the third LB frequency band is larger than that of the second LB frequency band. Further still: the second resonant mode is a Monopole mode. Further still: the current of the third resonance mode includes a current flowing from the first feeding point P1 to the first terminal 51 and a current flowing from the first feeding point P1 to the second terminal 52. Further still: the first frequency selective circuit 56 may control the first excitation signal to excite the first radiator 50 to generate one of a first resonant mode, a second resonant mode, and a third resonant mode, and may control the first excitation signal to excite the first radiator 50 to switch between two of the first resonant mode, the second resonant mode, and the third resonant mode. Further still: the first frequency selection circuit 56 may be in a low impedance state to control the first excitation signal to excite the first radiator 50 to generate the first resonant mode, may be in a high impedance state to control the first excitation signal to excite the first radiator 50 to generate the second resonant mode, and may be in a state between the low impedance state and the high impedance state to control the first excitation signal to excite the first radiator 50 to generate the third resonant mode. Further still: the first frequency selection circuit 56 may be in a short circuit state to control the first excitation signal to excite the first radiator 50 to generate the first resonant mode, may be in an open circuit state to control the first excitation signal to excite the first radiator 50 to generate the second resonant mode, and may be in a state between the short circuit state and the open circuit state to control the first excitation signal to excite the first radiator 50 to generate the third resonant mode. Further still: the first LB frequency band supported by the first resonance mode and the second LB frequency band supported by the second resonance mode are the same system, and can also be different systems. When the first LB frequency band supported by the first resonance mode and the second LB frequency band supported by the second resonance mode are the same standard: the first resonant mode supports an LTE LB frequency band such as a B8 frequency band, and the second resonant mode supports an LTE LB frequency band such as a B28 frequency band; alternatively, the first resonant mode supports an NR LB frequency band, such as an N8 frequency band, and the second resonant mode supports an NR LB frequency band, such as an N28 frequency band. When the first LB frequency band supported by the first resonance mode and the second LB frequency band supported by the second resonance mode are different systems: the first resonant mode supports an NR LB frequency band, such as an N8 frequency band, and the second resonant mode supports an LTE LB frequency band, such as a B28 frequency band; alternatively, the first resonant mode supports an LTE LB frequency band, e.g., a B8 frequency band, and the second resonant mode supports an NR LB frequency band, e.g., an N28 frequency band.

Referring to fig. 5, when the first radiator 50 is operated in the first resonant mode, the current of the middle frame 121 in the long-side extending direction can be sufficiently excited to improve the free space OTA (over the air) performance, which in some embodiments can be improved by about 1 dB.

Referring to fig. 6, when the first radiator 50 is operated in the third resonant mode, both ends of the first radiator 50, such as the first end 51 and the second end 52, are not grounded, so as to further reduce the influence of being held by the hand and improve the OTA performance in the hand-mold, head-hand-mold scenarios. In some embodiments 2-3dB may be lifted in a head-hand model scenario.

In some embodiments, referring to fig. 5, the first frequency selection circuit 56 is configured such that the first radiator 50 is in a first resonant mode, and the first resonant mode may support a highest frequency band of the LTE LB frequency band, for example, the LTE B8 frequency band, or a highest frequency band of the NR LB frequency band, for example, the N8 frequency band, and the second resonant mode may support the N41 frequency band of the NR HB frequency band. Further, the first radiator 50 may support dual-connection ENDC (4G Radio access network and 5G-NR dual-connection (E-UTRAN New Radio-Dual Connectivity, ENDC for short) combination of LTE LB band and NR HB band. Such as the ENDC of the LTE LB band and the N41 band.

In some embodiments, referring to fig. 6, the first frequency selection circuit 56 is configured such that the first radiator 50 is in a third resonant mode, and the third resonant mode may support a lowest frequency band of the LTE LB frequency band, for example, the LTE B28 frequency band or a lowest frequency band of the NR LB frequency band, for example, the N28 frequency band.

In some embodiments, the first frequency selection circuit 56 is configured such that the first radiator 50 is in a mixed mode of a first resonant mode and a third resonant mode, and the first resonant mode may further support a frequency band between a lowest frequency band and a highest frequency band in the LTE LB frequency band. For example, the first resonant mode may support a frequency band between an LTE B28 frequency band (or N28 frequency band) and an LTE B8 (or N8 frequency band) frequency band, such as an LTE B20 frequency band, an LTE B5 frequency band, or the like.

It should be understood that the number of first frequency selection sub-circuits 561 illustrated in the drawings should not be construed as limiting the number of first frequency selection sub-circuits 561 provided in the embodiments of the present application.

In some embodiments, the first frequency selection sub-circuit 561 may include a capacitance, or an inductance, or a combination of capacitance and inductance.

In an embodiment, when the first frequency selecting sub-circuits 561 are plural, each first frequency selecting sub-circuit 561 may be different, so that the degree of adjustment of the electrical length of the first radiator 50 is different when different first frequency selecting sub-circuits 561 are electrically connected to the first radiator 50.

Note that, the first frequency selection sub-circuits 561 referred to herein are different, and the devices included in each first frequency selection sub-circuit 561 may be different; or the included devices are the same, but the connection relation between the devices is different; alternatively, the devices included are identical and the connection relationship is identical, but the parameters of the devices (such as capacitance, or inductance) are different.

In addition, since the first radiator 50 supports more sub-bands in the LB band, the number of the first frequency selecting sub-circuits 561 is generally greater than or equal to two in order to achieve better adjustment of the LB band.

It is to be understood that the number of the first switches 562 in fig. 8 may be plural, and each first frequency selecting sub-circuit 561 is electrically connected to one first switch 562 in a one-to-one correspondence. Referring to fig. 9, fig. 9 is a schematic diagram of the structure of the first frequency selection circuit 56 in another embodiment of the antenna assembly 40 in the embodiment shown in fig. 8. Each of the first frequency selecting sub-circuits 561 is electrically connected to one of the first switching switches 562 in one-to-one correspondence.

Referring to fig. 10, fig. 10 is a schematic structural diagram of the antenna assembly 40 shown in fig. 3 in another embodiment. The antenna assembly 40 further includes a second radiator 60, a second feed S2 electrically connected to the second radiator 60, and a first parasitic stub 70 capacitively coupled to the second radiator 60. The second feed S2 may generate a second excitation signal that is transmitted to the second radiator 60. Further, the antenna assembly 40 may excite the second radiator 60 and the first parasitic stub 70 by the second excitation signal to generate dual resonances supporting the MHB frequency band. One of the dual resonances of the MHB frequency band is used to support a portion of the frequency band in the MHB frequency band and the other of the dual resonances is used to support another portion of the frequency band in the MHB frequency band. Specifically, the dual resonance of the MHB band includes: one resonance mode is used for supporting an intermediate frequency MB frequency band, and the other resonance mode is used for supporting a high-frequency HB frequency band; alternatively, one resonant mode is used to support the MB frequency band and the other resonant mode is also used to support the MB frequency band; alternatively, one resonant mode is used to support the HB band and the other resonant mode is used to support the HB band.

The second radiator 60 may be, but is not limited to being, an LDS radiator, or an FPC radiator, or a PDS radiator, or a metal branch radiator. When the antenna assembly 40 is applied to the electronic device 100, the second radiator 60 may be a structural antenna radiator designed with the metal of the electronic device 100 itself. For example, the second radiator 60 may be an antenna radiator designed by using a middle frame 121 formed by plastic and metal of the electronic device 100. In addition, the second radiator 60 may be a metal branch antenna radiator designed for the metal middle frame 121.

The shape, structure and material of the second radiator 60 are not particularly limited, and the shape of the second radiator 60 includes, but is not limited to, a bent shape, a strip shape, a sheet shape, a rod shape, a coating, a film, etc. When the second radiator 60 is in a strip shape, the extending track of the second radiator 60 is not limited in the present application, so the second radiator 60 can be in a linear, curved, multi-section bending track. The second radiator 60 may be a line with a uniform width on the extending track, or a bar with a gradual width change and a widening area with unequal widths.

The second radiator 60 has a third end 61, a first ground point 62, a second feeding point P2, and a first frequency selection point 63.

The first ground point 62 is disposed away from the second end 52 as compared to the third end 61. The first ground point 62 is grounded. The first grounding point 62 is electrically connected to the ground by, but not limited to, direct electrical connection (such as soldering), or indirect electrical connection via coaxial lines, microstrip lines, rf lines, conductive clips, conductive adhesives, insert metals, or a middle frame connection of the electronic device 100.

The second feeding point P2 is located between the third end 61 and the first ground point 62, and a specific position of the second feeding point P2 on the second radiator 60 may not be limited. The second feeding point P2 may receive a second excitation signal. That is, the second feeding point P2 may be directly or indirectly electrically connected to the second feed source S2.

The first frequency selection point 63 may be grounded, and the manner in which the first frequency selection point 63 is electrically connected to ground includes, but is not limited to, direct electrical connection (such as soldering), or indirect electrical connection via a coaxial line, a microstrip line, a radio frequency line, a conductive spring, conductive adhesive, insert metal, or a middle frame connection of the electronic device 100. The first frequency selection point 63 may overlap with the second feeding point P2, or may be located between the second feeding point P2 and the first ground point 62.

In some embodiments, the second radiator 60 may have gaps between both ends and other components. In some scenarios, when the antenna assembly 40 is applied in the electronic device 100, gaps between the two ends of the second radiator 60 and other components are not easily held or blocked at the same time. The second radiator 60 can transmit and receive electromagnetic wave signals even when one of the two slots is blocked, and thus the antenna assembly 40 has a good communication performance.

In some embodiments, the second radiator 60 may be formed on the middle frame 121, for example, the frame portion 1212. In some embodiments, the second radiator 60 may have the middle frame 121, e.g., the body portion 1211, the frame portion 1212, as a ground pole. The ground electrode is connected to the main body 1211 by a connecting material between the main body 1211 and the frame 1212, so as to be grounded.

The second excitation signal generated by the second feed S2 excites the second radiator 60 to generate a fifth resonant mode supporting the MHB frequency band. In some embodiments, the fifth resonant mode may support the LTE MHB band and/or the NR MHB band. In some embodiments, the fifth resonant mode may support LTE B32 bands. In some embodiments, the fifth resonant mode may support an N41 band of the high frequency bands in NR.

In some embodiments, the fifth resonant mode may be a composite left-right hand antenna (CRLH) mode (a mode of a composite left-right hand transmission line structure). The current of the fifth resonant mode may be distributed in the current I5 between the third terminal 61 and the first ground point 62. In some embodiments, current I5 may flow from third terminal 61 to first ground point 62.

Referring to fig. 10, the second feed source S2 is electrically connected to the second feeding point P2 by, but not limited to, direct electrical connection (such as soldering); or indirectly and electrically connected by means of coaxial lines, microstrip lines, radio frequency lines, conductive elastic sheets, conductive adhesives, matching circuits and the like. In the present embodiment, the second feed S2 is electrically connected to the second feed point P2 through a matching circuit.

The second feed S2 is electrically connected to the second feed point P2 of the second radiator 60. The second feed S2 is separated from the first feed point P1 when the first feed S1 is electrically connected to the first feed point P1 of the first radiator 50. In other words, the feeds of the LB band and the NR HB band and the MHB band are separate feeds, and thus carrier aggregation of the LB band and the NR HB band with the MHB band, respectively, can be supported better (CarrierAggregation, CA).

Referring to fig. 10, the antenna assembly 40 may further include a second matching circuit 64 having one end electrically connected to the second feed S2 and the other end electrically connected to the second feed point P2. The second excitation signal may be transmitted to the second feeding point P2 through the second matching circuit 64.

In some embodiments, the second matching circuit 64 may be comprised of a switch control circuit and/or a load circuit, or may be comprised of an adjustable capacitance (which may be replaced by a fixed capacitance) and/or an adjustable inductor (which may be replaced by a fixed capacitance). The second matching circuit 64 performs impedance matching to improve the antenna performance of the antenna assembly 40.

Referring to fig. 11, fig. 11 is a schematic structural diagram of the second matching circuit 64 matching with the second feed source S2 in the embodiment shown in fig. 10. The second matching circuit 64 may include a second capacitor C2 having one end electrically connected to the second feed S2 and the other end electrically connected to the second feed point P2. The second capacitor C2 can perform impedance matching, so as to improve the antenna performance of the antenna assembly 40.

Referring to fig. 4, the antenna assembly 40 may further include a second frequency selection circuit 65 having one end electrically connected to the first frequency selection point 63 and the other end grounded. That is, the first frequency selection point 63 may be grounded through the second frequency selection circuit 65, not directly grounded. Of course, in some embodiments, the first frequency bin 63 may be directly grounded.

The second frequency selective circuit 65 may tune and decouple the MHB frequency band supported by the resonance mode generated by the second radiator 60, for example, the fifth resonance mode, to improve the performance of the antenna.

When the second frequency selection circuit 65 is electrically connected to the second feeding point P2, that is, the first frequency selection point 63 is overlapped with the second feeding point P2, the second frequency selection circuit 65 and the second feed source S2 may share one electrical connection (for example, a conductive spring) to be electrically connected to the second radiator 60, without using two separate conductive members.

When the second frequency selection circuit 65 is electrically connected to the first frequency selection point 63, that is, when the first frequency selection point 63 is not overlapped with the second feeding point P2, compared with when the first frequency selection point 63 is overlapped with the second feeding point P2, the switching efficiency of the second frequency selection circuit 65 is higher, meanwhile, the first frequency selection point 63 can realize a certain degree of shunt to the second feeding point P2, the current density is reduced, and meanwhile, the electromagnetic wave absorption ratio (Specific Absorption Rate, SAR) value is also reduced.

The second frequency selection circuit 65 may consist of a switch control circuit and/or a load circuit, or may consist of an adjustable capacitance (which may also be replaced by a fixed capacitance) and/or an adjustable inductor (which may also be replaced by a fixed capacitance). In an embodiment, the switch control circuit may be a switch chip with a switch function, or may be a single pole multiple throw switch or a single pole single throw switch.

The second frequency selection circuit 65 can control the effective electrical length of the second radiator 60, so as to adjust the frequency band and the resonance frequency point of the electromagnetic wave signal supported by the second radiator 60, so as to further control the second radiator 60 to operate in the MHB frequency band.

Referring to fig. 12, fig. 12 is a schematic diagram illustrating a structure of the second frequency selection circuit 65 in the antenna assembly 40 in the embodiment shown in fig. 10. The second frequency selection circuit 65 may include at least one second frequency selection subcircuit 651 and a second switch 652. The second switch 652 has a second common terminal 6521 grounded, a plurality of second connection terminals 6522, and a second switching portion 6523, and the second switching portion 6523 can be electrically connected to the second common terminal 6521. The second switching part 6523 may be electrically connected to one second connection terminal 6522 under the control of a control signal. One end of the partial second frequency selecting sub-circuit 651 is electrically connected with the first frequency selecting point 63, and the other end is electrically connected with one second connecting end 6522 in one-to-one correspondence. The other end of one second frequency selecting sub-circuit 651 in the other part of the second frequency selecting sub-circuits 651 is directly grounded.

It will be appreciated that the connection sequence of the second frequency selection sub-circuit 651 and the second switch 652 in the second frequency selection circuit 65 may be adjusted, for example, the point of the second frequency selection circuit 65 grounded in fig. 12 may be directly electrically connected to the first frequency selection point 63, and the corresponding point of the second frequency selection circuit connected to the first frequency selection point 63 may be directly grounded.

Referring to fig. 12, the second switching portion 6523 is selectively electrically connected to different second connection ends 6522, so that one end of the different second frequency selection sub-circuits 651 is electrically connected to the first frequency selection point 63, and the other end is grounded, or the first frequency selection point 63 is directly grounded, so that the second radiator 60 has different effective electrical lengths in different states, and is switched between different sub-bands in the MHB band.

It will be appreciated that the number of illustrations of the second frequency selective sub-circuit 651 in the illustrations should not be construed as limiting the number of second frequency selective sub-circuits 651 provided by embodiments of the application.

In some embodiments, the second frequency selective subcircuit 651 can include a capacitance, or an inductance, or a combination of capacitance and inductance.

In an embodiment, when the second frequency selecting sub-circuits 651 are plural, each second frequency selecting sub-circuit 651 may be different, so that the degree of adjustment of the electrical length of the second radiator 60 is different when the different second frequency selecting sub-circuits 651 are electrically connected to the second radiator 60.

It should be noted that, the second frequency selection sub-circuits 651 are different, and the devices included in each second frequency selection sub-circuit 651 may be different; or the included devices are the same, but the connection relation between the devices is different; alternatively, the devices included are identical and the connection relationship is identical, but the parameters of the devices (such as capacitance, or inductance) are different.

In addition, since the second radiator 60 supports more sub-bands in the MHB band, the number of the second frequency selection sub-circuits 651 is generally greater than or equal to two in order to achieve better adjustment of the MHB band.

It is to be understood that the number of the second switches 652 in fig. 12 may be plural, and each second frequency selecting sub-circuit 651 is electrically connected to one second switch 652 in a one-to-one correspondence manner. Referring to fig. 13, fig. 13 is a schematic diagram illustrating a structure of the second frequency selection circuit 65 in another embodiment of the antenna assembly 40 in the embodiment shown in fig. 12. The second frequency selecting sub-circuits 651 are directly grounded, and each of the remaining second frequency selecting sub-circuits 651 is electrically connected to one second change-over switch 652 in one-to-one correspondence.

Referring to fig. 10, the first parasitic stub 70 may be, but is not limited to being, an LDS radiator, or an FPC radiator, or a PDS radiator, or a metal stub radiator. When the antenna assembly 40 is applied to the electronic device 100, the first parasitic stub 70 may be a structural antenna radiator designed with the electronic device 100 itself insert metal. For example, the first parasitic branch 70 may be an antenna radiator designed by using a middle frame 121 formed by plastic and metal of the electronic device 100. In addition, the first parasitic branch 70 may also be a metal branch antenna radiator designed for the metal middle frame 121.

The shape, structure and material of the first parasitic branch 70 are not particularly limited, and the shape of the first parasitic branch 70 includes, but is not limited to, a bent shape, a strip shape, a sheet shape, a rod shape, a coating, a film, etc. When the first parasitic branch 70 is in a strip shape, the extending track of the first parasitic branch 70 is not limited in the present application, so the first parasitic branch 70 can be in a track extension such as a straight line, a curve, a multi-section bending, etc. The first parasitic branch 70 may be a line with a uniform width on the extending track, or may be a bar with a gradual width change and a widening area with an unequal width.

The first parasitic branch 70 is disposed between the second end 52 and the third end 61, and the first parasitic branch 70 is capacitively coupled to the third end 61. Further, the first parasitic branch 70 may generate a resonance mode, such as a sixth resonance mode, supporting the MHB frequency band under excitation of the second excitation signal.

One end of the first parasitic stub 70 forms a first gap 401 with the first radiator 50, and the other end of the first parasitic stub 70 forms a second gap 402 with the second radiator 60 and is capacitively coupled.

In some embodiments, the portions of the first parasitic stub 70 where the second end 52 is located (i.e., the second portion 54) may be aligned along a straight line, or substantially aligned along a straight line. The fact that the portion of the first parasitic stub 70 and the second end 52 are generally aligned includes, but is not limited to, the portion of the first parasitic stub 70 and the second end 52 being subject to small tolerances in the design or manufacturing process or being purposely provided.

In some embodiments, the first parasitic stub 70 and the third end 61 can be capacitively coupled through the second slot 402. In some embodiments, the portions of the first parasitic stub 70 and the third terminal 61 may be aligned along a straight line, or substantially aligned along a straight line, provided that the first parasitic stub 70 is capable of capacitively coupling with the third terminal 61. The fact that the portion where the first parasitic stub 70 and the third end 61 are located is generally aligned includes, but is not limited to, the portion where the first parasitic stub 70 and the third end 61 are located being subject to small tolerances in the design or manufacturing process or being purposely provided.

In one embodiment, the width of the second slit 402 may be 0.5-2mm, but is not limited to this size. When the width of the second slot 402 is 0.5-2mm, the first parasitic branch 70 and the third terminal 61 have better capacitive coupling effect.

It should be noted that "capacitive coupling" means that an electric field is generated between two radiators, and a signal of one radiator can be transmitted to the other radiator through the electric field, and accordingly, a signal of the other radiator can be transmitted to the one radiator through the electric field, so that the two radiators can achieve conduction of an electric signal even without direct contact or direct connection. For example, the capacitive coupling of the first parasitic branch 70 and the third end 61 of the second radiator 60 means that the first parasitic branch 70 and the third end 61 of the second radiator 60 generate an electric field, and a signal of the third end 61 of the second radiator 60 can be transmitted to the first parasitic branch 70 through the electric field, and accordingly, a signal of the first parasitic branch 70 can be transmitted to the third end 61 of the second radiator 60 through the electric field, so that the second radiator 60 and the first parasitic branch 70 can realize the conduction of the electric signal even without direct contact or direct connection.

In some embodiments, the first parasitic branch 70 may generate a resonant mode, such as a sixth resonant mode, that supports the MHB frequency band upon excitation by the second excitation signal. Further, since the feed of the LB band, the NR HB band and the feed of the MHB band are separate feeds, carrier aggregation (Carrier Aggregation, CA) between the LB band and the NR HB band and the MHB band can be supported better.

In some embodiments, referring to fig. 10, the second excitation signal may excite the first parasitic branch 70 to generate a sixth resonant mode.

In some embodiments, the sixth resonant mode may support the MHB frequency band. In some embodiments, the sixth resonant mode may support the LTE MHB band.

In some embodiments, the sixth resonant mode may support the 2.2GHz band and the 2.8GHz band in the LTE MHB band, such that the overall system efficiency is improved by about 0.5dB.

In some embodiments, the first parasitic branch 70 may share the first frequency selection circuit 56 with the first radiator 50. That is, the first frequency selective circuit 56 may be electrically connected to the first parasitic branch 70. That is, the first parasitic branch 70 has a second frequency selecting point B1 thereon to be electrically connected to the first frequency selecting circuit 56. The first parasitic branch 70 is grounded through the first frequency selective circuit 56.

In some embodiments, the sixth resonant mode may include distributing the second selected frequency point B1 and the current I6 at the end of the first parasitic branch 70 near the third end 61. The current I6 flows from the second frequency selection point B1 to the end of the first parasitic branch 70 near the third end 61.

In some embodiments, the sixth resonant mode may be a 1/2 wavelength mode from the second selected frequency point B1 to an end of the first parasitic branch 70 near the third end 61.

Accordingly, first frequency selective circuit 56 may tune the MHB frequency band supported by the resonant mode generated by first parasitic branch 70. It can be seen that the first frequency selection circuit 56 can be used for tuning the LB frequency band and the MHB frequency band, and can better consider the performance of the antenna supporting the LB frequency band and the antenna supporting the MHB frequency band. In addition, compared to providing a third frequency selection circuit electrically connected to the second frequency selection point B1 of the first parasitic branch 70, the antenna assembly 40 can achieve a corresponding function by using the first frequency selection circuit 56 when the first frequency selection circuit 56 and the third frequency selection circuit tune the LB frequency band and the MHB frequency band respectively, so that the cost can be saved. Of course, in other embodiments, the first frequency selection circuit 56 and the third frequency selection circuit may be utilized to tune the LB frequency band and the MHB frequency band, respectively.

In some embodiments, the first parasitic branch 70 may generate a resonant mode, such as a sixth resonant mode, that supports the MHB frequency band upon excitation by the second excitation signal. Further, the second radiator 60 and the first parasitic branch 70 are subjected to the combined action of the first frequency selection circuit 56 (or the first frequency selection circuit 56 and the third frequency selection circuit) and the second frequency selection circuit 65, so that the second excitation signal easily excites the double resonance in the MHB frequency band. Therefore, it is advantageous to expand the bandwidth of the MHB band supported by the antenna assembly 40, and to be advantageous for the scenarios of carrier aggregation, dual-card, and single-band.

For example, in the CA scenario, the second feed S2 excites dual resonance of the MHB band, where one resonance mode is used to support the MB band and the other resonance mode is used to support the HB band.

A dual card scenario may include dual card bi-pass (Dual SIM dualactive, DSDA), or dual receive mode dual card bi-standby (Dual Receive Dual SIM Dual Standby, DR-DSDS). The DSDA means that two cards can work simultaneously, however, the frequency bands supported by the two cards are different, in other words, one card of the two cards can support the frequency band a, the other card shell supports the frequency band b, and the frequency band a and the frequency band b do not belong to the same frequency band.

In addition, for DSDA, one of the cards may either transmit or receive signals; the other card may also transmit signals as well as receive signals.

Wherein, DR-DSDS refers to one of two cards that can transmit signals and can receive signals; the other card can only receive signals and can not transmit signals.

In a single-band scenario, the second feed S2 excites dual-resonance in the MHB band, where one resonance mode is used to support the MB band, and the other resonance mode is also used to support the MB band. Or in a single-band scene, the second feed source S2 excites dual resonance of the MHB frequency band, wherein one resonance mode is used for supporting the HB frequency band, and the other resonance mode is also used for supporting the HB frequency band.

In some embodiments, under the combined action of the first frequency selective circuit 56 (or the first frequency selective circuit 56 and the third frequency selective circuit) and the second frequency selective circuit 65, the second excitation signal is easier to form dual resonance of the MHB frequency band at the second radiator 60 and the first parasitic branch 70. Thus, the antenna assembly 40 can support the MHB band, and the antenna assembly 40 has a good communication function. It should be noted that, when the second radiator 60 and the first parasitic branch 70 support the MHB frequency band together, the second radiator 60 is a main radiating branch, and the first parasitic branch 70 is a capacitive coupling branch, that is, a secondary radiating branch.

In addition, the second radiator 60 and the first parasitic branch 70 support the MHB frequency band together, so when the antenna assembly 40 is applied to the electronic device 100, it is difficult to hold or shield the second radiator 60 and the first parasitic branch 70 at the same time, and therefore, when the electronic device 100 to which the antenna assembly 40 is applied is held or shielded by one hand or both hands, the antenna assembly 40 still has better radiation performance in the MHB frequency band when applied to the electronic device 100.

In one embodiment, when the antenna assembly 40 is applied in the electronic device 100, the second radiator 60 and the first parasitic branch 70 are located at the bottom of the electronic device 100 (i.e., a short side such as the second side 1214 or the third side 1215 is close to the second side 1214). The first parasitic branch 70 is generally disposed corresponding to a middle portion of a bottom edge (i.e., a short edge such as the second edge 1214) of the electronic device 100.

Therefore, the electronic device 100 to which the antenna assembly 40 is applied is generally not easy to be held or shielded by a single hand when being held, and thus has a better single-hand effect. In addition, when the second radiator 60 and the first parasitic branch 70 are located at the bottom of the electronic device 100, when the electronic device 100 is used (such as a phone call, etc.), the second radiator 60 and the first parasitic branch 70 are usually far away from the head of the user, and are not easy to cause larger radiation to the head of the user, so when the antenna assembly 40 is applied to the electronic device 100, the second radiator 60 and the first parasitic branch 70 are located at the bottom of the electronic device 100, and the first parasitic branch 70 is usually located corresponding to the middle of the bottom edge of the electronic device 100, so that the antenna assembly 40 has better head-hand performance and head-hand performance. In summary, the antenna assembly 40 has better hand performance, head-hand performance.

In some embodiments, the antenna assembly 40 has two radiators (the second radiator 60 and the first parasitic stub 70) supporting the MHB frequency band, and dual resonance of the MHB frequency band. Thus, the MHB frequency band supported by the antenna assembly 40 has a wide bandwidth. Further, even if the electronic device 100 applied by the antenna assembly 40 is gripped or blocked by a user to cause frequency offset, since the bandwidth of the MHB frequency band supported by the antenna assembly 40 is wider, the resonance frequency point of the MHB frequency band can still fall within the bandwidth range even if the resonance frequency point is shifted, so that the communication performance of using the MHB frequency band to communicate due to the frequency offset caused by the gripping or blocking of one or both hands is ensured.

In some embodiments, the first radiator 50, the second radiator 60 and the first parasitic branch 70 form a whole with a center line M0, the center line M0 passes through the first parasitic branch 70, and the first slit 401 and the second slit 402 are respectively located at two sides of the center line M0.

When the antenna assembly 40 is applied to the electronic device 100, a center line M0 of the whole of the first radiator 50, the first parasitic branch 70, and the second radiator 60 coincides or substantially coincides with a center line M1 (see fig. 31 extending in the length direction and passing through a center of a short side (side in the X direction) of the electronic device 100 (extending in the length direction and passing through a midpoint O of a short side (e.g., a second side 1214) of the electronic device 100).

When a user holds the electronic device 100 with his hand, the user's thumb will typically hold to the center line M0 or a position approximating the center line M0.

According to the antenna assembly 40 provided by the embodiment of the application, the first slot 401 and the second slot 402 are respectively located at two sides of the central line M0, so that the first slot 401 and the second slot 402 are not easy to be blocked or held by the hand of a user, or the central line M0 and the second slot 402 are not easy to be blocked or held by the hand of the user at the same time, and then the radiation performance of the antenna assembly 40 is better. When the electronic device 100 applied by the antenna assembly 40 is used by a flat screen, the first slit 401 and the second slit 402 are not easy to be blocked or held by the hand of the user, or the first slit 401 and the second slit 402 are not easy to be blocked or held by the hand of the user, so that the flat screen effect of the electronic device 100 applied by the antenna assembly 40 is better.

Referring to fig. 14, fig. 14 is a schematic structural diagram of the antenna assembly 40 shown in fig. 10 in another embodiment. The antenna assembly 40 may further include a third frequency selection circuit 71 having one end electrically connected to the second frequency selection point B1 and the other end grounded. That is, the second frequency selection point B1 may be grounded through the third frequency selection circuit 71, not directly grounded. Of course, in some embodiments, the second frequency-selective point B1 may be directly grounded.

The third frequency selective circuit 71 may tune and decouple the MHB frequency band supported by the resonance mode generated by the first parasitic branch 70, for example, the fifth resonance mode, to improve the performance of the antenna.

The third frequency selection circuit 71 may consist of a switch control circuit and/or a load circuit, or of an adjustable capacitance (which may also be replaced by a fixed capacitance) and/or an adjustable inductor (which may also be replaced by a fixed capacitance). In an embodiment, the switch control circuit may be a switch chip with a switch function, or may be a single pole multiple throw switch or a single pole single throw switch.

The third frequency selection circuit 71 can control the effective electrical length of the first parasitic branch 70, so as to adjust the frequency band and the resonance frequency point of the electromagnetic wave signal supported by the first parasitic branch 70, so as to further control the first parasitic branch 70 to operate in the MHB frequency band.

Referring to fig. 15, fig. 15 is a schematic diagram of the structure of the third frequency selection circuit 71 in the antenna assembly 40 in the embodiment shown in fig. 14. The third frequency selection circuit 71 may comprise at least one third frequency selection sub-circuit 711 and a third switch 712. The third switch 712 has a third common terminal 7121 grounded, a plurality of third connection terminals 7122, and a third switching portion 7123. The third switching part 7123 may be electrically connected to the third common terminal 7121. The third switching portion 7123 may be electrically connected to a third connection 7122 under the control of the control signal. One end of the part of the third frequency selecting sub-circuit 711 is electrically connected to the third frequency selecting point B1, and the other end is electrically connected to a third connecting end 7122 in one-to-one correspondence. The other end of one of the third frequency selective sub-circuits 711 is directly grounded.

The third frequency selective sub-circuit 711, which is directly grounded, can still tune the MHB frequency band supported by the first parasitic branch 70 and the second radiator 60 when the third switch 712 is all turned off. In addition, since the third frequency selective sub-circuit 711, which is directly grounded, is directly electrically connected to the first parasitic branch 70, rather than being electrically connected to the first parasitic branch 70 through a switch, the third frequency selective sub-circuit 711, which is directly grounded, has less loss when tuning the MHB frequency band supported by the second radiator 60 and the first parasitic branch 70.

When the third switch 712 electrically connects the third frequency selecting sub-circuit 711 to the first parasitic branch 70, the third frequency selecting sub-circuit 711 tunes the MHB frequency band supported by the second radiator 60 and the first parasitic branch 70 together.

It will be appreciated that the connection sequence of the third frequency selection sub-circuit 711 and the third switch 712 in the third frequency selection circuit 71 may be adjusted, for example, a point of the third frequency selection circuit 71 in fig. 12 that is grounded may be directly electrically connected to the third frequency selection point B1, and correspondingly, a point of the third frequency selection point B1 that is electrically connected to the third frequency selection point may be directly grounded.

Referring to fig. 15, the third switching portion 7123 may be selectively electrically connected to different third connection ends 7122, so that one end of the different third frequency-selecting sub-circuits 711 is electrically connected to the third frequency-selecting point B1, and the other end is grounded, or the third frequency-selecting point B1 is directly grounded, so that the first parasitic branch 70 has different effective electrical lengths in different states, and is switched between different sub-bands in the MHB band.

It should be understood that the number of the third frequency selection sub-circuits 711 shown in the drawings should not be construed as limiting the number of the third frequency selection sub-circuits 711 provided in the embodiments of the present application.

In some embodiments, the third frequency selective subcircuit 711 can include a capacitor, or an inductance, or a combination of a capacitor and an inductance.

In an embodiment, when the third frequency selecting sub-circuits 711 are plural, each third frequency selecting sub-circuit 711 may be different, so that the degree of adjustment of the electrical length of the first parasitic branch 70 is different when the different third frequency selecting sub-circuits 711 are electrically connected to the first parasitic branch 70.

Note that, the third frequency selection sub-circuits 711 are different, and the devices included in each third frequency selection sub-circuit 711 may be different; or the included devices are the same, but the connection relation between the devices is different; alternatively, the devices included are identical and the connection relationship is identical, but the parameters of the devices (such as capacitance, or inductance) are different.

In addition, since the first parasitic branch 70 supports more sub-bands in the MHB band, the number of first parasitic branches 70 is generally greater than or equal to two in order to achieve better adjustment of the MHB band.

It is to be understood that the number of the third switches 712 in fig. 15 may be plural, and each third frequency selecting sub-circuit 711 is electrically connected to one third switch 712 in a one-to-one correspondence manner. Referring to fig. 16, fig. 16 is a schematic diagram illustrating a structure of the third frequency selection circuit 71 in another embodiment of the antenna assembly 40 in the embodiment shown in fig. 15. The third frequency selecting sub-circuits 711 are directly grounded, and each of the remaining third frequency selecting sub-circuits 711 is electrically connected to one third switch 712 in one-to-one correspondence.

Referring to fig. 17, fig. 17 is a schematic diagram of an antenna assembly 40 shown in fig. 10 in another embodiment. The first parasitic branch 70 may share the first frequency selective circuit 56 with the first radiator 50. The first frequency selection circuit 56 includes at least one first frequency selection sub-circuit 561, a first switch 562, and at least one third frequency selection sub-circuit 711.

The matching relationship between the at least one first frequency selecting sub-circuit 561 and the first switch 562 can be referred to fig. 8 and the description of the at least one first frequency selecting sub-circuit 561 and the first switch 562 in fig. 8 will not be repeated.

The matching relationship between the at least one third frequency selection sub-circuit 711 and the first switch 562 can be referred to fig. 15, and the description of the at least one third frequency selection sub-circuit 711 and the third switch 712 in fig. 15 is omitted.

Referring to fig. 18, fig. 18 is a schematic diagram of a structure of the first frequency selection circuit 56 shown in fig. 17 in another embodiment of the antenna assembly 40. The first parasitic branch 70 may share the first frequency selective circuit 56 with the first radiator 50. The first frequency selection circuit 56 includes at least one first frequency selection sub-circuit 561, a first switch 562, at least one third frequency selection sub-circuit 711, and a third switch 712.

The matching relationship between the at least one first frequency selecting sub-circuit 561 and the first switch 562 can be seen in fig. 9, and the description of the at least one first frequency selecting sub-circuit 561 and the first switch 562 in fig. 9 is omitted.

The matching relationship between the at least one third frequency selection sub-circuit 711 and the third switch 712 can be referred to fig. 16, and the description of the at least one third frequency selection sub-circuit 711 and the third switch 712 in fig. 16 is omitted.

Referring to fig. 19, fig. 19 is a graph showing performance of the second radiator 60 in the antenna assembly 40 shown in fig. 10 according to an embodiment. Wherein the horizontal axis is frequency (GHz) and the vertical axis is total system efficiency (dB). Curve a is the overall system efficiency curve of the second radiator 60 with the aid of the first parasitic stub 70. Curve B is the overall efficiency curve of the system for the second radiator 60 without the aid of the first parasitic stub 70. The curve A has a first mark point (1.9934, -1.8304) and the curve B has a second mark point (2.0375, -2.306). As can be seen from a comparison of the curves near the first marker points (1.9934, -1.8304) with the curves near the second marker points (2.0375, -2.306), the second radiator 60, with the aid of the first parasitic branch 70, improves the overall system efficiency, and improves the antenna performance of the antenna assembly 40.

In some embodiments, the overall system efficiency of the second radiator 60 with the aid of the first parasitic branch 70 and the overall system efficiency of the second radiator 60 without the aid of the first parasitic branch 70 are compared as shown in the following table:

it can be seen that the arrangement of the first parasitic branch 70 can enhance the overall efficiency of the system for medium and high frequencies, and also highlight the performance of enhancing the overall efficiency of the system for medium and high frequencies in other frequency bands.

Where each of the third frequency selective sub-circuits 711 includes a capacitor, that is, the frequency selective circuit electrically connected to the second frequency selective point B1 by the third frequency selective sub-circuit 711 includes a capacitor through which a current of the sixth resonant mode flows, the antenna assembly 40 may further include an inductor 72 and a SAR sensor (e.g., SAR chip) 73. Referring to fig. 20, fig. 20 is a schematic diagram illustrating the matching of the inductor 72 and the SAR sensor 73 according to an embodiment of the present invention. The inductor 72 is electrically connected to the third frequency selection point B1 of the first parasitic branch 70. The SAR sensor 73 is electrically connected to the inductance 72.

The SAR value is typically high when the antenna assembly 40 is operating in the MHB frequency band, while the SAR is typically not high when the antenna assembly 40 is operating in the LB frequency band. Thus, the antenna assembly 40 is illustrated as being incorporated into a third frequency selective sub-circuit 711 using an inductance 72 and a SAR sensor 73.

Due to the capacitance in the third frequency selection sub-circuit 711, the first parasitic branch 70 is equivalent to a floating state for the SAR sensor 73 operating on direct current, and the influence of direct current in the ground electrode (or ground system) or the second feed source S2 on the detection accuracy of the first parasitic branch 70 can be prevented. Thus, the SAR sensor 73 may be configured to receive and output a change in the capacitance value detected by the first parasitic branch 70.

In some embodiments, the inductance L is used to isolate the SAR sensor 73 from the first parasitic branch 70. The inductance value of the inductor 72 may be, but is not limited to, 68nH, 82nH, or the like.

When the antenna assembly 40 is applied to the electronic device 100, the electronic device 100 may also include a processor 74. The processor 74 is electrically connected to the SAR sensor 73. The SAR sensor 73 can transmit the capacitance value detected by the first parasitic branch 70 to the processor 74, so that the processor 74 can determine whether the power of the second feed source S2 needs to be reduced according to the capacitance value detected by the first parasitic branch 70, or the power of the first feed source S1 can be reduced. That is, the processor 74 may adjust the transmit power of the first radiator 50 and the first parasitic branch 70, the second radiator 60 according to the change in the capacitance value.

Specifically, a capacitance is formed between the first parasitic branch 70 and ground, and the capacitance value between the first parasitic branch 70 and ground is the original capacitance value. When a target organism (e.g., a human body) approaches the first parasitic branch 70, a capacitance is formed between the first parasitic branch 70 and the target organism, and a capacitance value of the capacitance is related to a distance between the first parasitic branch 70 and the target organism. For convenience of description, the capacitance value of the capacitance formed between the first parasitic branch 70 and the target organism is named as a detection capacitance value. The detected capacitance value is greater than the original capacitance value. Accordingly, the SAR sensor 73 can determine whether a target organism is approaching the first parasitic branch 70 based on the capacitance value detected by the first parasitic branch 70.

Also, since the detected capacitance value is related to the distance between the first parasitic branch 70 and the target organism, the processor 74 can determine the distance between the target organism and the first parasitic branch 70 according to the detected capacitance value. When the distance between the target organism and the first parasitic branch 70 is less than or equal to the predetermined distance, it indicates that the MHB frequency band supported by the first parasitic branch 70 and the second radiator 60 is out of standard for the radiation of the target organism. It should be noted that, for radiation safety, the radiation of some countries or regions sets safety standards. The safety standards are different in some countries or regions. The preset distance is the safety distance when the first parasitic branch 70 and the second radiator 60 radiate the electromagnetic wave signal of the MHB frequency band to radiate the safety standard; or, the preset distance is smaller than the safety distance.

In an embodiment, the processor 74 determines whether the distance between the target organism and the first parasitic branch 70 is less than or equal to the preset distance according to the detected capacitance value, and the processor 74 is further configured to reduce the power (also referred to as the conduction power) of the second feed source S2 when it is determined that the distance between the target organism and the first parasitic branch 70 is less than or equal to the preset distance. To reduce the radiation of the target organism by the MHB frequency band supported by the first parasitic branch 70 and the second radiation pattern. Of course, the power of the first feed S1 may also be reduced.

In another embodiment, the processor 74 determines whether the detected capacitance is greater than or equal to a predetermined capacitance, and when the processor 74 determines that the detected capacitance is greater than or equal to the predetermined capacitance, the power (also referred to as the conduction power) of the second feed S2 is reduced to reduce the radiation of the MHB frequency band supported by the first parasitic branch 70 and the second radiation pattern to the target organism. The preset capacitance value is a safety capacitance value when the electromagnetic wave signals of the MHB frequency band radiated by the first parasitic branch 70 and the second radiator 60 meet the safety standard; alternatively, the preset capacitance value is smaller than the Yu Angui capacitance value. Note that, for the same country or region, the safety capacitance value and the safety distance are generally the only correspondence. Of course, the power of the first feed S1 may also be reduced.

The SAR sensor 73 can receive the change in capacitance detected by the first parasitic branch 70, and the SAR sensor 73 transmits the change in capacitance detected by the first parasitic branch 70 to the processor 74, so that the processor 74 can determine whether the power of the first feed source S1 and the second feed source S2 needs to be reduced according to the capacitance of the first parasitic branch 70. Further, the radiation of the MHB frequency band supported by the first parasitic branch 70 and the second radiator 60 to the target organism is reduced or even prevented when the target organism approaches the first parasitic branch 70, and accordingly, the radiation hazard to the target organism is reduced or even prevented.

It should be noted that the schematic diagrams of the foregoing embodiments are schematic illustrations of the antenna assembly 40 provided in some embodiments, and should not be construed as limiting the antenna assembly 40 provided in the embodiments of the present application. The antenna assembly 40 in some embodiments may also be in a mirrored relationship with the antenna assembly 40 provided in the previous embodiments. For example, in the view of the schematic diagram of the previous embodiment, the first radiator 50 is located at the left side of the first parasitic branch 70, and the second radiator 60 is located at the right side of the first parasitic branch 70. In other embodiments of the antenna assembly 40, the first radiator 50 may also be located to the right of the first parasitic stub 70 and the second radiator 60 may also be located to the left of the first parasitic stub 70. Referring to fig. 21, fig. 21 is a schematic diagram of an antenna assembly 40 according to another embodiment of the present application. The antenna assembly 40 shown in fig. 21 is a mirror image of the antenna assembly 40 shown in fig. 10.

Referring to fig. 22, fig. 22 is a schematic structural diagram of an antenna assembly 40 according to another embodiment of the present disclosure. The second radiator 60 further has a third feeding point P3, a second ground point 66 grounded, and a fourth end 67. The third feeding point P3 is spaced apart from the second feeding point P2, and the second grounding point 66 is located between the second feeding point P2 and the third feeding point P3 and between the first grounding point 62 and the third feeding point P3. The fourth end 67 is located on the side of the third feeding point P3 remote from the second ground point 66. The third feeding point P3 is for receiving a third excitation signal. The third excitation signal may excite the second radiator 60 to generate a resonant mode supporting the LB frequency band and/or the wifi2.4g frequency band.

The second grounding point 66 is electrically connected to the ground by, but not limited to, direct electrical connection (such as soldering), or indirect electrical connection via coaxial lines, microstrip lines, rf lines, conductive clips, conductive adhesives, insert metals, or a middle frame connection of the electronic device 100.

The antenna assembly 40 further includes a third feed S3 electrically connected to the second radiator 60, e.g., the third feed point P3, and a second parasitic stub 80 having a third slot 403 between it and the fourth end 67. The second parasitic branch 80 has a third ground point 81 that is grounded. The second parasitic stub 80 has a third gap 403 between the fourth end 67 and is capacitively coupled.

The third feed S3 is used to generate a third stimulus signal. The third feed S3 is disposed between the second ground point 66 and the fourth end 67 at the third feed point P3, and the specific position of the first feed point P1 on the first radiator 50 may not be limited. The third feeding point P3 is for receiving a third excitation signal. That is, the third feeding point P3 may be directly or indirectly electrically connected to the third feed source S3.

The third feed source S3 is electrically connected to the third feeding point P3, so that the second radiator 60 and the second parasitic branch 80 are excited by the third excitation signal to generate a resonant mode supporting the LB frequency band and/or the wifi2.4g frequency band, so that the antenna assembly 40 supports more frequency bands, and the antenna assembly 40 has better communication performance.

In some embodiments, the third excitation signal excites the second radiator 60 and the second parasitic branch 80 to produce a resonant mode that supports the LB frequency band, but not the and/or the wifi2.4g frequency band. In some embodiments, the third excitation signal excites the second radiator 60 and the second parasitic branch 80 to produce a resonant mode that does not support the LB band, but rather supports and/or WiFi2.4G band. In some embodiments, the third excitation signal excites the second radiator 60 and the second parasitic branch 80 to produce resonant modes supporting the LB band and the WiFi2.4G band.

In some embodiments, the first resonant mode and the third resonant mode are used to support LB frequency bands, which corresponds to two LB frequency bands. When the third excitation signal excites the second radiator 60 and the second parasitic branch 80 to generate a resonant mode supporting the LB frequency band, the antenna assembly 40 can support 3 LB frequency bands.

In some embodiments, when the third excitation signal excites the second radiator 60 and the second parasitic branch 80 to produce a resonant mode supporting the LB frequency band. The first radiator 50 and the second radiator 60 are disposed on two sides of the first parasitic branch 70 and are not disposed adjacently, so that the isolation between the first radiator 50 and the second radiator 60 is better.

For the antenna assembly 40 applied to the electronic device 100 in China, three LB frequency bands are not needed, and therefore, the third excitation signal excites the second radiator 60 and the second parasitic branch 80 to generate a resonant mode supporting the WiFi2.4G frequency band instead of the LB frequency band. Of course, for the electronic device 100 in China, the third feed S3 may also support LB frequency bands when three LB frequency bands are required.

Further, in one embodiment, the third excitation signal excites the second radiator 60 and the second parasitic leg 80 to produce a resonant mode that supports GPS L5.

As can be seen from the foregoing description, the first resonant mode and the third resonant mode are used to support the LB frequency band, which corresponds to two LB frequency bands. For example, the first resonant mode supports LB frequency bands (e.g., LTE B8 band, N8 band), and the third resonant mode supports LB frequency bands (e.g., LTE B28 band, N28 band).

For the antenna assembly 40 of the electronic device 100 applied to other countries (simply referred to as overseas) other than china, three LB frequency bands are generally required, and therefore, the third excitation signal excites the second radiator 60 and the second parasitic branch 80 to generate a resonant mode supporting the LB frequency bands. For the antenna assembly 40 applied to the foreign electronic device 100, the third excitation signal excites the second radiator 60 and the second parasitic stub 80 to generate a resonant mode supporting the LB frequency band and the wifi2.4g frequency band. For example, LTE B20 band and wifi2.4g band, where LTE B20 band is a sub-band in LB band. When the third resonant mode supports an LB frequency band (such as an LTE B28 frequency band), the antenna assembly 40 may support an LTE B28 frequency band, an LTE B20 frequency band, and a wifi2.4g frequency band. In addition, when the second resonant mode in the antenna component 40 supports the N41 band, the antenna component 40 may support the N41 band, the LTE B28 band, the LTE B20 band, and the wifi2.4g band.

Since the third feed S3 is provided on the circuit board 13, it is often referred to as an A1 board for convenience of naming, for compatibility with A1 boards sold to china and abroad or for unified design for cost consideration. The antenna assembly 40 in china may also support three LB bands. That is, in the antenna assembly 40 applied to the electronic device 100 in China, the third excitation signal excites the second radiator 60 and the second parasitic stub 80 to generate the resonant mode supporting the LB band and the WiFi2.4G band.

In some embodiments, the third excitation signal excites the second radiator 60 to produce a seventh resonant mode supporting the LB frequency band. Thus, the antenna assembly 40 is enabled to have better communication performance.

In some embodiments, the current of the seventh resonant mode includes a current I7 distributed between the second ground point 66 and the fourth terminal 67.

In some embodiments, current I7 may flow from the second ground point 66 to the fourth terminal 67.

In some embodiments, the sixth resonant mode is a 1/4 wavelength mode from the second ground point 66 to the fourth terminal 67. The 1/4 wavelength mode is a resonance mode with relatively high efficiency, so that the transceiving efficiency of the frequency band supported by the sixth resonance mode can be enhanced.

In some embodiments, the third excitation signal excites the second radiator 60, the second parasitic branch 80 to produce an eighth resonant mode and a ninth resonant mode supporting the wifi2.4g frequency band. Thus, the antenna assembly 40 is enabled to have better communication performance. The eighth resonance mode and the ninth resonance mode are used for supporting the wifi2.4g band and the bluetooth band.

In some embodiments, the WiFi band and the bluetooth band are closer together when the third excitation signal excites the second radiator 60 and the second parasitic branch 80 to generate the eighth resonance mode and the ninth resonance mode supporting the WiFi2.4g band, and thus the WiFi band and the bluetooth band may share an antenna.

In some embodiments, the eighth resonant mode and the ninth resonant mode support the bluetooth frequency band together and support the wifi2.4g frequency band together, so that the antenna assembly 40 has more communication frequency bands and has better communication effect.

In some embodiments, the eighth and ninth resonant modes support the bluetooth band, which has a wider bandwidth. Further, even if the electronic device 100 applied by the antenna assembly 40 is gripped or blocked by the user to cause frequency offset, the third feed source S3 in the antenna assembly 40, the second radiator 60 and the second parasitic branch 80 cooperate to support the bluetooth frequency band with wider bandwidth, and even if the resonance frequency point of the bluetooth frequency band is offset, the resonance frequency point still can fall within the bandwidth range, so that the communication performance of using the bluetooth frequency band to communicate due to the frequency offset caused by being gripped or blocked by one hand or both hands is ensured. In other words, the antenna assembly 40 has a wide bandwidth and good hand performance, head-to-hand performance when operating in the bluetooth frequency band.

Accordingly, in some embodiments, the wifi2.4g band has a wider bandwidth when the eighth and ninth resonant modes are used to support the wifi2.4g band. Further, even if the electronic device 100 applied by the antenna assembly 40 is gripped or blocked by the user to cause frequency offset, the bandwidth of the wifi2.4g frequency band supported by the third feed source S3, the second radiator 60 and the second parasitic branch 80 in the antenna assembly 40 is wider, and even if the resonance frequency point of the wifi2.4g frequency band is offset, the resonance frequency point still can fall within the bandwidth range, so that the communication performance of using the wifi2.4g frequency band to communicate due to the frequency offset caused by being gripped or blocked by one hand or both hands is ensured. In other words, the antenna assembly 40 has a wide bandwidth and good human hand performance, human head hand performance when applied to the electronic device 100 and operating in the wifi2.4g frequency band.

Referring to fig. 23 and 24, fig. 23 is a schematic diagram of a main current flow corresponding to an eighth resonant mode in the antenna assembly shown in fig. 22, and fig. 24 is a schematic diagram of a main current flow corresponding to a ninth resonant mode in the antenna assembly shown in fig. 22. In some embodiments, the current of the eighth resonant mode includes a current I8 distributed between the second ground point 66 and the fourth terminal 67. In some embodiments, current I8 may flow from the second ground point 66 to the fourth terminal 67. In some embodiments, the eighth resonant mode is a 3/4 wavelength mode from the second ground point 66 to the fourth terminal 67. Therefore, the antenna assembly 40 can fully utilize the higher order mode of the second radiator 60, which is beneficial to reducing the electrical length of the second radiator 60, thereby saving the space of the antenna assembly 40. When the antenna assembly 40 is applied in the electronic device 100, layout in the electronic device 100 is facilitated.

In some embodiments, the current of the ninth resonant mode includes a current I9 distributed between the third slot 403 to the third ground point 81. In some embodiments, current I9 may flow from third slot 403 to third ground point 81. In some embodiments, the ninth resonant mode is a 1/4 wavelength mode of the third slot 403 to the third ground point 81. The 1/4 wavelength mode is a resonance mode with relatively high efficiency, so that the receiving and transmitting efficiency of the frequency band supported by the ninth resonance mode can be enhanced. Since the ninth resonance mode acts on the second parasitic branch 80, the ninth resonance mode is a resonance mode parasitic on the second parasitic branch 80.

Referring to fig. 24, the second parasitic stub 80 may be, but is not limited to being, an LDS radiator, or an FPC radiator, or a PDS radiator, or a metal stub radiator. When the antenna assembly 40 is applied to the electronic device 100, the second parasitic stub 80 may be a structural antenna radiator designed with the electronic device 100 itself insert metal. For example, the second parasitic branch 80 may be an antenna radiator designed by using a middle frame 121 formed by plastic and metal of the electronic device 100. In addition, the second parasitic branch 80 may also be a metal branch antenna radiator designed for the metal middle frame 121.

The second parasitic branch 80 may be a structural antenna radiator designed using the metal center 121 of the electronic device 100. It is to be understood that the shape, structure and material of the second parasitic node 80 are not particularly limited in this application, and the shape of the second parasitic node 80 includes, but is not limited to, a bent shape, a strip shape, a sheet shape, a rod shape, a coating, a film, etc. When the second parasitic branch 80 is in a strip shape, the extending track of the second parasitic branch 80 is not limited in the present application, so the second parasitic branch 80 can be in a track extension such as a straight line, a curve, and a multi-section bending. The second parasitic branch 80 may be a line with a uniform width on the extending track, or may be a bar with a gradual width change and a widening area.

The third ground point 81 is electrically connected to ground in a manner including, but not limited to, a direct electrical connection (such as a weld); or indirectly connected electrically through coaxial lines, microstrip lines, radio frequency lines, conductive spring plates, conductive glue, insert metal, or middle frame connection materials of the electronic device 100, etc. In the present embodiment, the third grounding point 81 is electrically connected to the ground in such a manner that the third grounding point 81 of the second parasitic branch 80 is electrically connected to the middle frame 121 by a middle frame connection.

Referring to fig. 24, when the antenna assembly 40 is applied to the electronic device 100, the second parasitic branch 80 is generally disposed corresponding to the long side (the side in the Y direction) of the electronic device 100, and the second parasitic branch 80 is spaced apart from the corner where the long side and the short side of the electronic device 100 are connected, so that when the electronic device 100 is on a flat screen and the antenna assembly 40 is operating in the wifi2.4g frequency band, the second parasitic branch 80 is generally difficult to be held by a user's hand, and therefore, the electronic device 100 to which the antenna assembly 40 is applied has good flat screen performance.

Referring to fig. 25, fig. 25 is a schematic diagram of an antenna assembly 40 according to another embodiment of the present application. The antenna assembly 40 further includes a third radiator 90 and a fourth feed S4 electrically connected to the third radiator 90. The fourth feed S4 may generate a fourth excitation signal that is transmitted to the third radiator 90. Further, the antenna assembly 40 may excite the third radiator 90 by the fourth excitation signal to generate a plurality of resonance modes supporting the wifi2.4g band and the bluetooth band.

The shape, construction and material of the third radiator 90 can be referred to in the above embodiments with respect to the first radiator 50.

The third radiator 90 has a fourth feeding point P4 to be electrically connected to the fourth feed source S4, and receives a fourth excitation signal.

The WiFi band and the bluetooth band are relatively close, and therefore, the WiFi band and the bluetooth band may share the third radiator 90. Thus, the antenna assembly 40 has more communication frequency bands and better communication effect.

In some embodiments, the fourth excitation signal excites the third radiator 90 to produce a resonant mode supporting the GPS L1 band. Thus, the third radiator 90 may support the GPS L1 band and the WiFi2.4G band.

Further, the third radiator 90 is disposed diagonally to the second radiator 60. The second radiator 60 and the third radiator 90 are both used for supporting the bluetooth frequency band, and the pattern of the third radiator 90 when receiving and transmitting electromagnetic wave signals in the bluetooth frequency band is complementary to the pattern of the second radiator 60 when receiving and transmitting electromagnetic wave signals in the bluetooth frequency band.

The third radiator 90 and the second radiator 60 are diagonally arranged, and thus the third radiator 90 and the second radiator 60 are not easily shielded at the same time. When one of the second radiator 60 and the third radiator 90 is shielded, the other can also work, so that the communication performance of the antenna assembly 40 when communicating by using the bluetooth frequency band and the wifi2.4g frequency band supported by the second radiator 60 and the third radiator 90 can be improved. For example, when the second radiator 60 and the third radiator 90 both support the bluetooth frequency band (or the wifi2.4g frequency band), the second radiator 60 is shielded (for example, placed in a pocket of a user's clothes, and the second radiator 60 is disposed downward), the bluetooth frequency band signal supported by the second radiator 60 is attenuated greatly, and the communication quality of the antenna assembly 40 using the bluetooth frequency band for communication is seriously affected. When the antenna assembly 40 communicates with the bluetooth headset by using the bluetooth frequency band, if the second radiator 60 is shielded, the bluetooth frequency band is continuously used for communication with the bluetooth headset, and the experience of the bluetooth headset is affected. Since the third radiator 90 is diagonally disposed with respect to the second radiator 60 and the patterns are complementary, the third radiator 90 is not easily shielded when the second radiator 60 is shielded, and the third radiator 90 still has a better communication performance.

It should be noted that, since the second radiator 60 and the third radiator 90 both support the bluetooth frequency band, the second radiator 60 and the third feed source S3 may be regarded as one bluetooth antenna (for convenience of description, named as a first bluetooth antenna), and the third radiator 90 and the fourth feed source S4 may be regarded as one bluetooth antenna (for convenience of description, named as a second bluetooth antenna). That is, the antenna assembly 40 includes two bluetooth antennas. From the foregoing, it is apparent that when one bluetooth antenna is blocked, communication can be performed using the other bluetooth antenna. Generally, when the antenna assembly 40 is used in the electronic device 100, the first bluetooth antenna is generally disposed corresponding to the bottom of the electronic device 100, and the second bluetooth antenna is generally disposed corresponding to the top of the electronic device 100. When the electronic device 100 (e.g., a mobile phone) to which the antenna assembly 40 is applied is placed in a pocket of a user, a bluetooth antenna can be better connected to a bluetooth headset, whether the top of the electronic device 100 is facing downward or the bottom of the electronic device 100 is facing downward.

In summary, the antenna assembly 40 provided in the embodiments of the present application may enhance the experience when the applied electronic device 100 is placed in a pocket for communication with a bluetooth headset. It will be appreciated that, conversely, when the Bluetooth headset is placed in a user pocket scenario, the antenna assembly 40 may still be in good communication with the Bluetooth headset. That is, the antenna assembly 40 may enhance the communication experience when communicating with a bluetooth headset placed in a user pocket scenario.

Because wiFi frequency channel and bluetooth frequency channel are comparatively close, therefore wiFi frequency channel and bluetooth frequency channel can share the antenna. Thus, in some embodiments, the second radiator 60 and the third radiator 90 both support the wifi2.4g band. Therefore, the second radiator 60 and the third feed source S3 may be regarded as one WiFi antenna (for convenience of description, named as a first WiFi antenna), and the third radiator 90 and the fourth feed source S4 may be regarded as one WiFi antenna (for convenience of description, named as a second WiFi antenna). That is, the antenna assembly 40 includes two WiFi antennas.

The third radiator 90 is disposed diagonally to the second radiator 60. The second radiator 60 and the third radiator 90 are both used for supporting the WiFi frequency band, and the pattern of the third radiator 90 when receiving and transmitting the electromagnetic wave signal of the WiFi frequency band is complementary to the pattern of the second radiator 60 when receiving and transmitting the electromagnetic wave signal of the WiFi frequency band.

Referring to the analysis of two bluetooth antennas, the antenna assembly 40 of the present embodiment also has better communication performance when it includes two WiFi antennas. When the electronic device 100 is in the landscape mode and plays a game using the wifi2.4g frequency band, a better landscape game experience is provided.

The second radiator 60 includes a third portion 68 and a fourth portion 69 connected in a bent manner. An end of the third portion 68 facing away from the fourth portion 69 is disposed adjacent to the first radiator 50. The third radiator 90 includes a fifth portion 91 and a sixth portion 92 connected by a bend. The fifth portion 91 is disposed adjacent to the first radiator 50 as compared to the sixth portion 92.

As can be seen from the above, the second radiator 60 and the third radiator 90 are disposed diagonally, and the above structural design of the second radiator 60 and the third radiator 90 facilitates the adaptation of the antenna assembly 40 and the electronic device 100 using the antenna assembly 40. A fourth gap 404 is provided between the third radiator 90 and the first radiator 50. The third radiator 90 has a fourth ground point 901 and a fifth ground point 902, the fourth ground point 901 and the fifth ground point 902 are grounded, the fourth ground point 901 is disposed adjacent to the first radiator 50 than the fifth ground point 902, and the fifth ground point 902 is located between the fourth feeding point P4 and the fourth ground point 901.

The fourth ground point 901 is grounded, and the third radiator 90 can be prevented from affecting the first radiator 50. The fifth ground point 902 is located between the fourth feeding point P4 and the fourth ground point 901, and the portion between the fifth ground point 902 and the free end of the third radiator 90 facing away from the fourth ground point 901 is the radiating portion of the third radiator 90 supporting the wifi2.4g band and the bluetooth band.

The fourth feeding point P4 is located at the fifth portion 91 or the sixth portion 92, and the fourth feeding point P4 is disposed adjacent to a corner where the fifth portion 91 is connected to the sixth portion 92.

The fourth feed S4 is electrically connected to the fourth feed P4, typically via a radio frequency signal line. The equivalent resistance of the radio frequency signal line is typically small (50 ohms). The fourth feeding point P4 is located at the fifth portion 91 or the sixth portion 92, and the fourth feeding point P4 is located adjacent to a corner where the fifth portion 91 is connected to the sixth portion 92, so that the fourth feeding point P4 is located at a portion of the third radiator 90 where the current is strongest or stronger. Therefore, the equivalent impedance of the third radiator 90 is low. Thereby matching the equivalent impedance of the third radiator 90 with the impedance of the radio frequency signal line connecting the fourth feed source S4 to the third radiator 90. Therefore, the radiation performance of the antenna unit formed by the fourth feed source S4 and the third radiator 90 in the antenna assembly 40 is better.

It can be seen that there is a first gap 401 between the first radiator 50 and the first parasitic stub 70 and a fourth gap 404 between the first radiator 50 and the third radiator 90. In other words, the first radiator 50 has slits at both ends, and the first slit 401 and the fourth slit 404 are not easily held or blocked at the same time when the antenna assembly 40 is applied to the electronic device 100. When one of the first slot 130 and the fourth slot 404 is blocked, the first radiator 50 can still transmit and receive electromagnetic wave signals in the LB frequency band, so that better communication performance is achieved.

Referring to fig. 26, fig. 26 is an equivalent circuit schematic diagram of an antenna assembly 40 according to an embodiment of the present application. The third feed source S3 is used for supporting a Bluetooth frequency band, and the fourth feed source S4 is used for supporting the Bluetooth frequency band. The third feed source S3 is electrically connected to the second radiator 60 through a radio frequency path S31, the fourth feed source S4 is electrically connected to the third radiator 90 through a radio frequency path S41, the third feed source S3 is connected to the radio frequency path S31 of the second radiator 60, and the third feed source S4 is different from the radio frequency path S41 connected to the third radiator 90. It can be seen that the antenna assembly 40 provided in the embodiment of the present application has two bluetooth radio frequency paths therein. The antenna assembly 40 has two bluetooth radio frequency paths, so that any one or both of the two bluetooth radio frequency paths can be used when the antenna assembly 40 operates in the bluetooth frequency band, and thus, the antenna assembly 40 has better communication performance.

Referring to fig. 27, fig. 27 is an equivalent circuit schematic diagram of an antenna assembly 40 according to another embodiment of the present application. The third feed source S3 is used for supporting a Bluetooth frequency band, and the fourth feed source S4 is used for supporting the Bluetooth frequency band. The third feed S3 is connected to the rf path S31 of the second radiator 60, which is identical to the rf path S41 of the fourth feed S4 to the third radiator 90, i.e. all with the rf path S43. The antenna assembly 40 further comprises a switching unit S34, the switching unit S34 being configured to electrically connect the third feed S3 to the second radiator 60 via the radio frequency path S43, or to electrically connect the fourth feed S4 to the third radiator 90 via the radio frequency path S43.

It can be seen that the first bluetooth antenna shares the same radio frequency path S43 with the second bluetooth antenna. The switching unit S34 may electrically connect the third feed S3 to the second radiator 60 through the radio frequency path S43, or may electrically connect the fourth feed S4 to the third radiator 90 through the radio frequency path S43, so that only one bluetooth antenna of the antenna assembly 40 operates at the same time.

Since the second radiator 60 and the third radiator 90 both support the bluetooth frequency band, the second radiator 60 and the third feed source S3 can be regarded as one bluetooth antenna (for convenience of description, named as a first bluetooth antenna), and the third radiator 90 and the fourth feed source S4 can be regarded as one bluetooth antenna (for convenience of description, named as a second bluetooth antenna). Specifically, in an embodiment, the switching unit S34 may receive the control signal and electrically connect the third feed source S3 to the second radiator 60 through the radio frequency path S43 or electrically connect the fourth feed source S4 to the third radiator 90 through the radio frequency path S31 under the control of the control signal. It can be seen that the antenna assembly 40 in this embodiment is a single channel bluetooth antenna.

Referring to fig. 28, fig. 28 is a schematic circuit diagram of the antenna assembly 40 shown in fig. 27 applied to the electronic device 100. When the antenna assembly 40 is applied in the electronic device 100, the electronic device 100 further comprises a detector 741 and a processor 74. The detector 741 is for detecting the posture or signal intensity of the electronic device 100 to generate a detection signal. The processor 74 is electrically connected to the detector 741, and the processor 74 is configured to generate a control signal based on the detection signal.

In one embodiment, detector 741 may be, but is not limited to, a gravity sensor. The gravity sensor may detect a gesture of the electronic device 100. In another embodiment, the detector 741 may be a radio frequency front end circuit for detecting the signal strength of the first antenna and the second antenna. The case where the detector 741 includes a gravity sensor will be described below.

When the detector 741 detects that the posture of the electronic device 100 is the first posture, a first sub-detection signal is generated. The processor 74 generates a first sub-control signal based on the first sub-detection signal. The switching unit S34 is configured to electrically connect the third feed source S3 to the second radiator 60 through the radio frequency path S43 under the control of the first sub-control signal. In other words, the first bluetooth antenna operates when the electronic device 100 is in the first posture. The detection signal comprises a first sub-detection signal, and the control signal comprises a first sub-control signal. When the electronic device 100 is in the first posture, the signal intensity of the electromagnetic wave signal of the first bluetooth antenna for receiving and transmitting the electromagnetic wave signal of the bluetooth frequency band is greater than the signal intensity of the electromagnetic wave signal of the second bluetooth antenna for receiving and transmitting the electromagnetic wave signal of the bluetooth frequency band.

When the detector 741 detects that the posture of the electronic device 100 is the second posture, a second sub-detection signal is generated. The processor 74 generates a second sub-control signal based on the second sub-detection signal. The switching unit S34 is configured to electrically connect the fourth feed source S4 to the third radiator 90 through the radio frequency path S43 under the control of the second sub-control signal. The detection signal further comprises a second sub-detection signal, and the control signal comprises a second sub-control signal. The first pose is different from the second pose. When the electronic device 100 is in the second posture, the signal intensity of the electromagnetic wave signal of the second bluetooth antenna for receiving and transmitting the electromagnetic wave signal of the bluetooth frequency band is greater than the signal intensity of the electromagnetic wave signal of the first bluetooth antenna for receiving and transmitting the electromagnetic wave signal of the bluetooth frequency band.

The antenna assembly 40 has better signal strength when operating in the bluetooth frequency band. Therefore, the antenna assembly 40 has a good communication effect when communicating using the bluetooth frequency band.

In some embodiments, the fourth feed S4 is also used to support the GPS L1 band. The fourth feed source S4 is also used for supporting the GPS L1 frequency band, so that the antenna assembly 40 can support more frequency bands and has better communication performance. When the fourth feed S4 is used to support GPS L1, the fourth feed S4 and the third radiator 90 may support the GPS L1 band and the WiFi2.4G band.

Referring further to fig. 25, the antenna assembly 40 further includes a fourth radiator 93 and a fifth feed S5. The fourth radiator 93 is spaced from the sixth portion 92 to form a fifth slit 405, and the fifth slit 405 is disposed adjacent to a corner portion where the fifth portion 91 is bent and connected to the sixth portion 92. In this embodiment, the fifth feed S5 is electrically connected to the fourth radiator 93 to support the WiFi5G band or the N78 band.

The fifth feed source S5 is electrically connected to the fourth radiator 93 to support the WiFi5G band or the N78 band, so that the communication effect of the antenna assembly 40 can be improved.

In the present embodiment, the fourth radiator 93 and the second parasitic stub 80 are bent and connected. In other embodiments, the fourth radiator 93 is spaced apart from the second parasitic branch 80 and is disconnected.

Referring to fig. 29, fig. 29 is a schematic diagram illustrating a distance between the first radiator 50 and the second radiator 60 in the antenna assembly 40 according to the embodiment shown in fig. 10. The closest locations between the first and second radiators 50, 60 are the second end 52 and the third end 61. The distance d1 between the second end 52 and the third end 61 satisfies: d1 is more than or equal to 10mm and less than or equal to 120mm. The distance d1 between the second end 52 and the third end 61 may be, but is not limited to, 10mm, or 15mm, or 20mm, or 25mm, or 30mm, or 35mm, or 40mm, or 45mm, or 50mm, or 55mm, or 60mm, or 70mm, or 80mm, or 90mm, or 100mm, or 110mm, or 120mm. Of course, d1 may be other values of 10mm or more and 120mm or less, as long as d1 of 10mm or less and 120mm or less is satisfied.

When d1 is more than or equal to 10mm and less than or equal to 120mm, the first radiator 50 and the second radiator 60 are far apart, and when the first radiator 50 and the second radiator 60 support LB frequency bands, the first radiator 50 and the second radiator 60 have good isolation effect.

Referring to fig. 25, the antenna assembly 40 has two LB antennas. One first LB antenna supporting LB frequency band comprises a first feed source S1 and a first radiator 50, and a second LB antenna supporting LB frequency band comprises a third feed source S3 and a second radiator 60. Thus, the antenna assembly 40 may achieve dual low frequencies.

The antenna assembly 40 may also include a third LB antenna. For example, the third LB antenna may be disposed on an upper side of the electronic device 100. The third LB antenna may comprise a fourth radiator 93 and a fifth feed S5. Thus, when the antenna assembly 40 includes the first, second and third LB antennas, the antenna assembly 40 can achieve three low frequencies. And in a dual-low-frequency Non-independent Networking (NSA) mode, the NSA combination of LB frequency bands is realized. Furthermore, the antenna assembly 40 may also be suitable in a dual card or a scenario requiring three LB antennas.

Referring to fig. 30 and 31, fig. 30 is a schematic structural diagram of an electronic device 100 shown in fig. 1 in another embodiment of the present application, and fig. 31 is a schematic diagram of the cooperation between the middle frame 121 and the circuit board shown in fig. 30. The electronic device 100 further comprises a first circuit board 55. The first feed S1 in the antenna assembly 40 is disposed on the first circuit board 55. The first circuit board 55 is provided on one side of the middle frame 121 (for example, can be carried by the main body 1211 of the middle frame 121).

Each radiator (the first radiator 50, the second radiator 60, the first parasitic branch 70, the second parasitic branch 80, the third radiator 90, the fourth radiator 93, etc.) in the antenna assembly 40 is illustrated as being formed on the middle frame 121 of the electronic device 100. At least one of respective slits (e.g., first slit 401, second slit 402, third slit 403, fourth slit 404, fifth slit 405) between the respective radiators (first radiator 50, second radiator 60, first parasitic branch 70, second parasitic branch 80, third radiator 90, fourth radiator 93, etc.) is filled with an insulating member 123 to enhance the structural strength of the middle frame 121 and prevent external moisture or dust from entering the inside of the electronic device 100 through the slits or dust.

With continued reference to fig. 30 and 31, when the electronic device 100 further includes the second circuit board 16. The second feed S2 is disposed on the second circuit board 16.

The first circuit board 15 is also called A2 board and the second circuit board 16 is also called A1 board.

Referring to fig. 31, when the user holds the electronic device 100 with his or her hand, the user's thumb is generally held at a short side of the electronic device 100, such as the second side 1214, and corresponds to the central axis M1, and the first radiator 50 is located at one side of the central axis M1. When the electronic device 100 to which the antenna assembly 40 is applied is used by a landscape screen, the first radiator 50 is not easily shielded or held by the hand of the user, and thus the landscape screen effect of the electronic device 100 to which the antenna assembly 40 is applied is good.

When the antenna assembly 40 is applied to the electronic device 100, the center line M0 of the whole of the first radiator 50, the first parasitic branch 70, and the second radiator 60 coincides or substantially coincides with the center line M1 of the electronic device 100 (see fig. 31 extending in the length direction and passing through the midpoint O of the short side of the electronic device 100). In the schematic diagram of the present embodiment, the center line M0 and the center line M1 overlap each other. The specific beneficial effects refer to the foregoing description, and are not repeated here.

In the present embodiment, when the antenna assembly 40 is applied to the electronic device 100, each radiator (the first radiator 50, the second radiator 60, the first parasitic branch 70, the second parasitic branch 80, the third radiator 90, the fourth radiator 93, etc.) of the antenna assembly 40 is formed on the middle frame 121, for example, the frame portion 1212, of the electronic device 100. It will be appreciated that in other embodiments, the individual radiators in the antenna assembly 40 may not be formed on the center frame 121 of the electronic device 100.

The first radiator 50 portion is disposed corresponding to the first edge 1213 and the first radiator 50 portion is disposed corresponding to the second edge 1214. The first radiator 50 can make full use of the length of the two sides to which the electronic device 100 is bent. In addition, the corner formed by bending the first edge 1213 and the second edge 1214 has a relatively good headroom, so as to improve the radiation efficiency of the LB band supported by the first radiator 50 in the antenna assembly 40.

Referring to fig. 32 and 33, fig. 32 is a schematic diagram of an electronic device 100 according to another embodiment of the present application, and fig. 33 is a schematic diagram of a middle frame 121 and a first circuit board 15 in fig. 31. The electronic apparatus 100 further has a first functional device 17, a second functional device 18, and a third functional device 19.

The second functional device 18 is spaced apart from the first functional device 17 to form a gap 16a. The second end 52 of the first radiator 50 of the antenna assembly 40 is disposed in correspondence with the gap 16a.

In this embodiment, the second functional device 18 may be a USB interface, and the first functional device 17 may be a speaker.

In other embodiments, the first functional device 17 is a USB interface and the second functional device 18 is a speaker.

The second functional device 18 is spaced apart from the first functional device 17 to form a gap 16a. The second end 52 of the first antenna assembly 40 is disposed in correspondence with the gap 16a, and thus, the second end 52 can be easily prepared.

In some embodiments, the second functional device 18 is disposed away from the first radiator 50 at a corner of the first portion 53 and the second portion 54 as compared to the first functional device 17. In other words, the second functional device 18 is arranged adjacent to the second radiator 60 compared to the first functional device 17. The second functional device 18 is arranged in correspondence with the first parasitic branch 70.

When the first gap 401 is formed between the second end 52 and the first parasitic branch 70, the first gap 401 may be disposed corresponding to the gap 16a, so that the first gap 401 may avoid shielding of the first functional device 17 and the second functional device 18, and the first radiator 50 has better radiation performance.

The second functional device 18 is spaced apart from the third functional device 19 to form a gap 16b. The third end 61 of the second radiator 60 of the antenna assembly 40 is disposed in correspondence with the gap 16b.

In this embodiment, the third functional device 19 may be an earphone interface.

The second functional device 18 is spaced apart from the third functional device 19 to form a gap 16b. The third end 61 of the first antenna assembly 40 is disposed corresponding to the gap 16b, and thus, the preparation of the third end 61 can be facilitated.

In some embodiments, the second functional device 18 is disposed away from the third portion 68 and the fourth portion 69 of the second radiator 60 at a corner thereof compared to the third functional device 19. In other words, the third functional device 19 is arranged adjacent to the second radiator 60 compared to the second functional device 18.

When the second gap 402 is formed between the third end 61 and the first parasitic branch 70, the second gap 402 may be disposed corresponding to the gap 16b, so that the second gap 402 may avoid shielding of the second functional device 18 and the third functional device 19, and the second radiator 60 has better radiation performance.

It should be noted that, only the components related to the present application are shown in the schematic diagrams of the antenna assembly 40 and the electronic device 100 provided in the various embodiments of the present application, and other components, such as the antenna assembly 40 or other antennas, are not excluded from the antenna assembly 40 and the electronic device 100 provided in the various embodiments of the present application, except for the components included in the foregoing embodiments. The antenna radiator, slot, ground point, etc. in other antennas are not illustrated.

Next, referring to fig. 34, fig. 34 is a schematic structural diagram of an electronic device 300 according to an embodiment of the present application. The electronic device 300 may be a mobile phone, a tablet computer, a notebook computer, a wearable device, etc. The present embodiment is illustrated using a mobile phone as an example. The structure of the electronic device 300 may include RF circuitry 310 (e.g., antenna assembly 40 in the above-described embodiments), memory 320, input unit 330, display unit 340 (e.g., display 50 in the above-described embodiments), sensor 350, audio circuitry 360, wiFi module 370, processor 380, and power supply 390 (e.g., battery 80 in the above-described embodiments), among others. The RF circuit 310, the memory 320, the input unit 330, the display unit 340, the sensor 350, the audio circuit 360, and the WiFi module 370 are respectively connected to the processor 380. The power supply 390 is used to provide power to the entire electronic device 300.

Specifically, RF circuit 310 is used to send and receive signals. Memory 320 is used to store data instruction information. The input unit 330 is used for inputting information, and may specifically include a touch panel 3301 and other input devices 3302 such as operation keys. The display unit 340 may include a display panel 3401 and the like. The sensor 350 includes an infrared sensor, a laser sensor, a position sensor, etc., for detecting a user proximity signal, a distance signal, etc. The speaker 3601 and the microphone (or microphone, or receiver assembly) 3602 are coupled to the processor 380 through the audio circuit 360 for receiving sound signals. The WiFi module 370 is configured to receive and transmit WiFi signals. The processor 380 is used for processing data information of the electronic device.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described device embodiments are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist alone physically, or two or more units may be integrated into one unit. The integrated units may be implemented in hardware or in software functional units.

The foregoing description is only exemplary embodiments of the present application, and is not intended to limit the scope of the patent application, but rather, the present application is intended to cover any equivalents of the structures or equivalent processes described in the specification and drawings, or any other related technical field, directly or indirectly, as may be included in the scope of the present application.

Claims

1. An antenna assembly, comprising:

2. The antenna assembly of claim 1, wherein the first resonant mode is an inverted F antenna IFA mode, and wherein the current of the first resonant mode comprises a current flowing from the first feed point to the first end.

3. The antenna assembly of claim 1 or 2, wherein the first resonant mode comprises a 1/4 wavelength mode from the first feed point to the first end.

4. The antenna assembly of claim 1 or 2, wherein the first excitation signal is configured to excite the first radiator to generate the first resonant mode and to also excite the first radiator to generate a fourth resonant mode, the fourth resonant mode being a LOOP antenna LOOP mode, a current of the fourth resonant mode comprising a current distributed between the first feed point and the second end.

5. The antenna assembly of claim 4, wherein the fourth resonant mode comprises a 1/2 wavelength mode from the first feed point to the second end.

6. The antenna assembly of claim 4, wherein the frequency band supported by the fourth resonant mode comprises a new air interface NR high frequency band.

7. The antenna assembly of claim 1, wherein the second resonant mode is a Monopole mode, and wherein the current in the second resonant mode includes a current flowing from the first feed point to the first end and a current flowing from the first feed point to the second end.

8. The antenna assembly of claim 1 or 2 or 7, wherein the second resonant mode comprises a 1/4 wavelength convection mode of the first feed point to the first end and a 1/4 wavelength convection mode of the first feed point to the second end.

9. The antenna assembly of claim 1, wherein the third resonant mode is a hybrid mode of IFA and Monopole, and wherein the current in the third resonant mode comprises a current flowing from the first feed point to the first end and a current flowing from the first feed point to the second end.

10. The antenna assembly according to claim 1 or 2 or 7 or 9, wherein the frequency band supported by the first resonant mode comprises a long term evolution, LTE, B8, frequency band or an N8 frequency band, and the frequency band supported by the second resonant mode comprises a LTE, B28, frequency band or an N28 frequency band.

11. The antenna assembly of claim 1 or 2 or 7 or 9, wherein the first radiator comprises a first portion and a second portion connected by a bend, the first portion having the first end and the second portion having the second end, the first feed point being located at the first portion or the second portion and disposed adjacent a corner of the first portion connected by the bend to the second portion.

12. The antenna assembly of claim 1 or 2 or 7 or 9, further comprising:

a first feed for producing the first excitation signal; and

and one end of the first matching circuit is electrically connected with the first feed source, and the other end of the first matching circuit is electrically connected with the first feed point.

13. The antenna assembly of claim 1, wherein the antenna assembly further comprises:

the first frequency selection circuit is arranged at the second end and is electrically connected with the first radiator, the first frequency selection circuit can be configured to control the first excitation signal to excite the first radiator to generate one of a first resonance mode, a second resonance mode and a third resonance mode, and the first frequency selection circuit can be configured to control the first excitation signal to excite the first radiator so as to switch between the first resonance mode, the second resonance mode and the third resonance mode.

14. The antenna assembly of claim 13, wherein the first frequency selective circuit is configurable to a low impedance state to control the first excitation signal to excite the first radiator to produce the first resonant mode, to a high impedance state to control the first excitation signal to excite the first radiator to produce the second resonant mode, and to a state intermediate between the low impedance state and the high impedance state to control the first excitation signal to excite the first radiator to produce the third resonant mode.

15. The antenna assembly of claim 13 or 14, wherein the first frequency selection circuit comprises:

the first switching switch is provided with a first common terminal which is grounded, a plurality of first connection terminals and a first switching part, wherein the first switching part is electrically connected with the first common terminal and is configured to be electrically connected to one first connection terminal of the plurality of first connection terminals under the control of a control signal; and

and one end of the at least one first frequency selecting sub-circuit is electrically connected with the second end, the other end of the at least one first frequency selecting sub-circuit is electrically connected with the first connecting ends of the plurality of first connecting ends in a one-to-one correspondence manner, and the remaining first connecting ends of the plurality of first connecting ends are electrically connected with the second end.

16. The antenna assembly of claim 13, wherein the antenna assembly further comprises:

The first parasitic branch is arranged between the second end and the third end, one end of the first parasitic branch forms a first gap with the first radiator, and the other end of the first parasitic branch forms a second gap with the second radiator and is capacitively coupled; and

the second frequency selecting circuit is electrically connected with the first frequency selecting point, the second excitation signal is used for exciting the second radiator and the first parasitic branch to generate double resonances of a middle-high frequency MHB band, and the double resonances of the MHB band comprise: one resonance mode is used for supporting an intermediate frequency MB frequency band, and the other resonance mode is used for supporting a high-frequency HB frequency band; alternatively, one resonant mode is used to support the MB frequency band and the other resonant mode is also used to support the MB frequency band; alternatively, one resonant mode is used to support the HB band and the other resonant mode is used to support the HB band.

17. The antenna assembly of claim 16, wherein the first radiator, the first parasitic stub, and the second radiator form a unitary body having a centerline, the centerline intersecting the first parasitic stub, and the first slot and the second slot are located on either side of the centerline, respectively.

18. The antenna assembly of claim 16, wherein the first frequency selective point is located between the second feed point and the first ground point or coincides with the second feed point.

19. The antenna assembly according to any of claims 16-18, wherein the dual resonance of the MHB frequency band comprises a fifth resonance mode, the fifth resonance mode being a composite left-right hand antenna CRLH mode, the current of the fifth resonance mode comprising the current flowing from the third terminal to the first ground point.

20. The antenna assembly according to claim 19, characterized in that the fifth resonance mode is used for supporting long term evolution, LTE, MHB, band and/or new air interface, NR, MHB, band.

21. The antenna assembly of claim 16, wherein the antenna assembly further comprises:

a second feed for producing the second excitation signal; and

and one end of the second matching circuit is electrically connected with the second feed source, and the other end of the second matching circuit is electrically connected with the second feed point.

22. The antenna assembly of claim 16, wherein the second frequency selective circuit comprises:

the second switching switch is provided with a second public end, a plurality of second connecting ends and a second switching part, wherein the second public end is grounded, and the second switching part is electrically connected with the second public end and is configured to be electrically connected to one of the second connecting ends under the control of a control signal; and

And one end of each second frequency selecting sub-circuit is electrically connected with the first frequency selecting point, the other end of each second frequency selecting sub-circuit is grounded, and the other ends of the other second frequency selecting sub-circuits are electrically connected with the first connecting ends in the plurality of second connecting ends in a one-to-one correspondence manner.

23. The antenna assembly of claim 16, wherein the first parasitic stub has a second frequency bin;

the first frequency selecting circuit is electrically connected with the second frequency selecting point; or, the antenna assembly further comprises a third frequency selecting circuit, and the third frequency selecting circuit is electrically connected with the second frequency selecting point.

24. The antenna assembly of claim 23, wherein the dual resonance of the MHB frequency band includes a sixth resonance mode, the frequency selective circuits of the first frequency selective circuit and the third frequency selective circuit electrically connected to the second frequency selective point and the second frequency selective circuit are configured to cooperatively control the second excitation signal to excite the first parasitic branch to generate the sixth resonance mode, and a current of the sixth resonance mode includes a current flowing from the second frequency selective point to an end of the first parasitic branch near the third end.

25. The antenna assembly of claim 24, wherein the sixth resonant mode is a 1/2 wavelength mode from the second selected frequency point to an end of the first parasitic stub near the third end.

26. The antenna assembly of any one of claims 23-25, wherein the third frequency selection circuit comprises:

the third switching switch is provided with a third common terminal which is grounded, a plurality of third connecting terminals and a third switching part, wherein the third switching part is electrically connected with the third common terminal and is configured to be electrically connected to one third connecting terminal of the plurality of third connecting terminals under the control of a control signal; and

and one end of each third frequency selecting sub-circuit is electrically connected with the second frequency selecting point, the other end of each third frequency selecting sub-circuit is grounded, and the other ends of the other third frequency selecting sub-circuits are electrically connected with the third connecting ends in a one-to-one correspondence manner.

27. The antenna assembly of any one of claims 24-25, wherein a frequency selective circuit of the first frequency selective circuit and the third frequency selective circuit that is electrically connected to the second frequency selective point comprises a capacitance that circulates a current of the sixth resonant mode;

The antenna assembly further comprises:

one end of the third inductor is electrically connected to a second frequency selection point of the first parasitic branch; and

And the SAR sensor is electrically connected with the other end of the third inductor and is used for outputting the change of the capacitance value detected by the first parasitic branch.

28. The antenna assembly of claim 16, wherein the second radiator further has a third feed point, a fourth end, and a second ground point, the third feed point being spaced apart from the second feed point, the second ground point being located between the second feed point and the third feed point and between the first ground point and the third feed point, the fourth end being located on a side of the third feed point remote from the second ground point, the antenna assembly further comprising:

the second parasitic branch is provided with a third grounding point which is grounded, and a third gap is arranged between the second parasitic branch and the fourth end; and

and the third feed source is electrically connected to the third feed point so as to support an LB frequency band and/or a wireless fidelity WiFi2.4G frequency band.

29. The antenna assembly of claim 28, wherein when the third feed supports LB frequency band, the third feed is configured to excite the second radiator to generate a seventh resonant mode, the seventh resonant mode being a 1/4 wavelength mode from the second ground point to the fourth end.

30. The antenna assembly of claim 28 wherein when the third feed supports wifi2.4g, the third feed is for exciting the second radiator to produce an eighth resonant mode and exciting the second parasitic branch to produce a ninth resonant mode, the eighth resonant mode and the ninth resonant mode being for supporting wifi2.4g and bluetooth frequency bands.

31. The antenna assembly of claim 30, wherein the eighth resonant mode is a 3/4 wavelength mode from the second ground point to the fourth end and the ninth resonant mode is a 1/4 wavelength mode from the third slot to the third ground point.

32. The antenna assembly of claim 28, wherein the antenna assembly further comprises:

a third radiator having a fourth feeding point; and

And the fourth feed source is electrically connected with the fourth feed point, so that the third radiator supports the WiFi2.4G frequency band and the Bluetooth frequency band.

33. The antenna assembly of claim 32, wherein the third radiator is disposed diagonally to the second radiator, the second radiator and the third radiator are each configured to support a bluetooth frequency band, and a pattern of the third radiator when transmitting and receiving electromagnetic signals in the bluetooth frequency band is complementary to a pattern of the second radiator when transmitting and receiving electromagnetic signals in the bluetooth frequency band.

34. The antenna assembly of claim 33, wherein the second radiator includes a third portion and a fourth portion connected in a bent configuration, an end of the third portion facing away from the fourth portion being disposed adjacent to the first radiator, the third radiator including a fifth portion and a sixth portion connected in a bent configuration, the fifth portion being disposed adjacent to the first radiator as compared to the sixth portion.

35. The antenna assembly of claim 34, wherein the fourth feed point is located at the fifth or sixth portion and the fourth feed point is located adjacent a corner of the fifth portion that connects with the sixth portion.

36. The antenna assembly of any one of claims 32-35, wherein a fourth gap is provided between the third radiator and the first radiator, the third radiator having a fourth ground point and a fifth ground point, both of which are grounded, the fourth ground point being disposed adjacent the first radiator as compared to the fifth ground point, the fifth ground point being located between the fourth feed point and the fourth ground point.

37. The antenna assembly of any one of claims 32-35 wherein the third feed is for supporting bluetooth frequencies and the fourth feed is for supporting bluetooth frequencies, the third feed being electrically connected to a different radio frequency path of the second radiator than the radio frequency path of the fourth feed being electrically connected to the third radiator.

38. The antenna assembly of any one of claims 32-33, wherein the third feed is configured to support bluetooth frequencies and the fourth feed is configured to support bluetooth frequencies, the third feed being electrically connected to a radio frequency path of the second radiator, the same radio frequency path as the fourth feed being electrically connected to the third radiator, the antenna assembly further comprising a switching unit configured to cause the third feed to be electrically connected to the second radiator through the radio frequency path or to cause the fourth feed to be electrically connected to the third radiator through the radio frequency path.

39. The antenna assembly of any one of claims 32-35, wherein the fourth feed is further configured to support a GPS L1 band.

40. The antenna assembly of any one of claims 34-35, wherein the antenna assembly further comprises:

a fourth radiator disposed at an interval from the sixth portion to form a fifth slit disposed adjacent to a corner portion where the fifth portion is bent and connected with the sixth portion; and

And the fifth feed source is electrically connected to the fourth radiator so as to support a WiFi5G frequency band or an N78 frequency band.

41. The antenna assembly of claim 17, wherein a distance d1 between the second end and the third end satisfies: d1 is more than or equal to 10mm and less than or equal to 120mm.

42. An antenna assembly, comprising:

43. The antenna assembly of claim 42, further comprising:

the second radiator is provided with a third end, a first grounding point and a second feeding point, the first grounding point is grounded, the first grounding point is arranged away from the second end compared with the third end, the second feeding point is positioned between the third end and the first grounding point, and the second feeding point is used for receiving a second excitation signal;

the first parasitic branch is arranged between the second end and the third end, one end of the first parasitic branch forms a first gap with the first radiator, the other end of the first parasitic branch forms a second gap with the second radiator and is capacitively coupled, the second excitation signal is used for exciting the second radiator and the first parasitic branch to generate double resonances of a middle-high frequency MHB band, and the double resonances of the MHB band comprise: one resonance mode is used for supporting an intermediate frequency MB frequency band, and the other resonance mode is used for supporting a high-frequency HB frequency band; alternatively, one resonant mode is used to support the MB frequency band and the other resonant mode is also used to support the MB frequency band; alternatively, one resonant mode is for supporting the HB band and the other resonant mode is for supporting the HB band, and the first frequency selective circuit may be configured to tune the resonant mode in the MHB band supported by the first parasitic branch.

44. An antenna assembly as in claim 42 wherein the first resonant mode and the third resonant mode are configured to support a low frequency LB band and the frequency of the band supported by the first resonant mode is greater than the frequency of the band supported by the third resonant mode.

45. The antenna assembly of claim 42 or 44 wherein the first resonant mode comprises a 1/4 wavelength mode from the first feed point to the first end or a 3/4 wavelength mode from the first feed point to the first end.

46. An electronic device, comprising:

a first circuit board for generating the first excitation signal; and

47. The electronic device of claim 46, further comprising a center frame, wherein the first radiator, the second radiator, and the first parasitic branch are formed on the center frame.

48. The electronic device of claim 46, further comprising first and second sides connected by a bend, wherein the first radiator is disposed partially corresponding to the first side and partially corresponding to the second side.

49. The electronic device of claim 48, wherein the first side is a long side of the electronic device and the second side is a short side of the electronic device, the electronic device having a central axis parallel to the first side and intersecting the second side at a midpoint of the second side, the first radiator being located on one side of the central axis and the second radiator being located on the other side of the central axis, the first parasitic branch intersecting the central axis.

50. The electronic device of claim 46, wherein the electronic device further comprises:

a first functional device; and

A second functional device spaced apart from the first functional device to form a gap;

the first end is disposed in correspondence with a gap between the first functional device and the second functional device.

51. The electronic device of claim 50, wherein the electronic device further comprises:

a third functional device spaced apart from the second functional device to form a gap;

the third end is arranged corresponding to a gap between the second functional device and the third functional device.

52. The electronic device of claim 46, wherein the first parasitic branch is provided with a second frequency-selective point, the first frequency-selective circuit is electrically connected to the second frequency-selective point, and the frequency-selective circuit electrically connected to the second frequency-selective point comprises a capacitor that transmits current on the first parasitic branch;

The electronic device further includes:

one end of the inductor is electrically connected to the second frequency selection point; and

The SAR sensor is electrically connected with the other end of the inductor and is used for outputting the change of the capacitance value detected by the first parasitic branch;

and the processor is electrically connected with the SAR sensor, is used for receiving the change of the capacitance value transmitted by the SAR sensor, and is used for adjusting the transmitting power of the first radiator, the first parasitic branch and the second radiator according to the change of the capacitance value.