CN117913507A

CN117913507A - Antenna assembly, middle frame assembly and electronic equipment

Info

Publication number: CN117913507A
Application number: CN202211236196.5A
Authority: CN
Inventors: 周林
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2024-04-19
Also published as: WO2024078166A1

Abstract

The application discloses an antenna assembly, a middle frame assembly and electronic equipment, and relates to the technical field of communication. In the application, the first feed source is used for exciting the radiator to support a first frequency band; the second feed source is used for exciting the radiator to support a second frequency band; the second switching circuit is configured to control the second feed point to be on with the second feed source when the first switching circuit controls the ground point to be on with ground so that the second feed source excites the radiator to support the second frequency band, and to control the second feed point to be off with the second feed source when the first switching circuit controls the ground point to be off with ground so that the first feed source excites the radiator to support the first frequency band. The application effectively reduces the number of the radiators and further reduces the occupation of the antenna assembly to the space of the electronic equipment.

Description

Antenna assembly, middle frame assembly and electronic equipment

Technical Field

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

Background

With more and more communication functions of electronic devices, a single antenna cannot meet the requirement of wireless communication of people. Therefore, many electronic devices are equipped with multiple antennas to receive different wireless signals, such as GSM, WIFI, etc. However, a plurality of antennas occupy a large area, and there is a problem of mutual interference.

Disclosure of Invention

The present application provides an antenna assembly comprising:

The radiator is provided with a first free end, a second free end, a first feeding point, a second feeding point and a grounding point, wherein the first feeding point, the second feeding point and the grounding point are arranged between the first feeding point and the second feeding point, and the grounding point is arranged on one side, away from the second free end, of the second feeding point;

The first feed source is electrically connected with the first feed point and is used for exciting the radiator to support a first frequency band;

the second feed source is used for exciting the radiator to support a second frequency band;

the first switching circuit is electrically connected between the grounding point and the ground so as to enable the grounding point to be grounded through the first switching circuit, and the first switching circuit is used for controlling the grounding point to be connected with the ground or controlling the grounding point to be disconnected with the ground; and

And a second switching circuit electrically connected between the second feed point and the second feed source so that the second feed source is electrically connected with the second feed point through the second switching circuit, wherein the second switching circuit is used for controlling the second feed point to be connected with the second feed source or controlling the second feed point to be disconnected with the second feed source, when the first switching circuit controls the grounding point to be connected with the ground, the second switching circuit is configured to control the second feed point to be connected with the second feed source so that the second feed source excites the radiator to support the second frequency band, and when the first switching circuit controls the grounding point to be disconnected with the ground, the second switching circuit is configured to control the second feed point to be disconnected with the second feed source so that the first feed source excites the radiator to support the first frequency band.

The application provides an antenna assembly comprising:

The radiator is provided with a first free end, a second free end, a first feeding point, a second feeding point, a third feeding point and a grounding point, wherein the first feeding point, the second feeding point, the third feeding point and the grounding point are arranged between the first feeding point and the second feeding point, the grounding point is arranged on one side, away from the second free end, of the second feeding point, and the third feeding point is arranged between the first free end and the first feeding point;

the first feed source is electrically connected with the first feed point and is used for exciting a radiator on the radiator, which is positioned between the first feed point and the second free end, so as to support a low-frequency band;

A second feed for exciting a radiator on the radiator between the ground point and the second free end to support a mid-high frequency band;

The first switching circuit is electrically connected between the grounding point and the ground so as to enable the grounding point to be grounded through the first switching circuit, and the first switching circuit is used for controlling the grounding point to be connected with the ground or controlling the grounding point to be disconnected with the ground;

A second switching circuit electrically connected between the second feed point and the second feed source such that the second feed source is electrically connected to the second feed point through the second switching circuit, the second switching circuit being configured to control the second feed point to be on with the second feed source or to control the second feed point to be off with the second feed source, the second switching circuit being configured to control the second feed point to be on with the second feed source when the first switching circuit controls the ground point to be on with ground so that the second feed source excites a radiator on the radiator between the ground point and the second free end, the second switching circuit being configured to control the second feed point to be off with the second feed source when the first switching circuit controls the ground point to be off with the ground so that the first feed source excites a radiator on the radiator between the first feed point and the second free end; and

And the third feed source is electrically connected with the third feed point and is used for exciting the radiator so as to support a WiFi frequency band or an NR frequency band.

The application provides a middle frame assembly, comprising:

A substrate provided with a ground plane;

the frame is arranged around the substrate in a surrounding mode; and

The antenna assembly as described above, wherein the radiator is disposed on the frame and a gap is disposed between the radiator and the ground plane.

The present application provides an electronic device including:

A middle frame assembly comprising:

A substrate;

The frame is connected with the substrate, and comprises a first frame, a second frame, a third frame and a fourth frame which are connected end to end in sequence and are arranged around the substrate in a surrounding mode, wherein the first frame and the third frame are arranged oppositely, the second frame and the fourth frame are arranged oppositely, and the lengths of the first frame and the third frame are shorter than those of the second frame and shorter than those of the fourth frame;

The antenna assembly as described above, wherein the radiator is disposed on the first frame;

the battery cover is arranged on one side of the middle frame assembly, is respectively connected with the first frame, the second frame, the third frame and the fourth frame, and is arranged opposite to the substrate; and

The display screen is arranged on the other side of the middle frame assembly, is respectively connected with the first frame, the second frame, the third frame and the fourth frame, and is arranged opposite to the substrate.

By adopting the technical scheme of the application, the application has the following beneficial effects: according to the application, the radiator is electrically connected with the two feed sources by utilizing the two feed points, so that the antenna assembly realizes a wireless transmission function through the cooperation of a single radiator and the two feed sources, the number of the radiators is effectively reduced, the occupation of the antenna assembly to the space of the electronic equipment is further reduced, and in addition, the interference when the two feed sources excite the radiator is reduced through the control of the first switching circuit and the second switching circuit.

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 described 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 diagram of an antenna assembly according to some embodiments of the present application;

FIG. 2 is a schematic diagram of the configuration of the second feed and second switching circuit of FIG. 1 in some embodiments;

Fig. 3 is a schematic diagram of a structure of a second switching circuit in another embodiment of the antenna assembly in the embodiment shown in fig. 2;

Fig. 4 is a schematic structural diagram of the antenna assembly shown in fig. 1 in another embodiment;

fig. 5 is a schematic structural diagram of the first feed and the first frequency selection circuit in the embodiment shown in fig. 4 in other embodiments;

Fig. 6 is a schematic structural diagram of the third feed and the second frequency selective circuit in the embodiment shown in fig. 4, in other embodiments;

Fig. 7 is a schematic view of the antenna assembly of fig. 4 in alternative embodiments;

Fig. 8 is a graph of return loss of the antenna assembly of fig. 7 excited by the second and third feeds in another embodiment;

fig. 9 is a graph of the overall efficiency of the system in which the antenna assembly of fig. 7 is excited by the second and third feeds in another embodiment;

fig. 10 is a graph of return loss of the antenna assembly of fig. 7 excited by the first and third feeds in another embodiment;

Fig. 11 is a graph of the overall efficiency of the system in which the antenna assembly of fig. 7 is excited by the first and third feeds in another embodiment;

FIG. 12 is an exploded view of an electronic device according to an embodiment of the present application;

FIG. 13 is a schematic view of the frame assembly of the embodiment of FIG. 12;

Fig. 14 is a schematic structural diagram of an electronic device according to an embodiment of the application.

Detailed Description

The present application will be described in further detail with reference to the drawings and embodiments. It is to be noted that the following embodiments are only 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 those skilled 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 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 antenna assembly. The antenna assembly can be applied to electronic equipment. The antenna assembly may support at least one of a WiFi (Wireless-Fidelity) frequency band, a medium-high frequency band, an NR (new air interface) frequency band, or a low frequency band.

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.

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

Referring to fig. 1, fig. 1 is a schematic structural diagram of an antenna assembly according to some embodiments of the application. The antenna assembly 100 may include a radiator 10, a first feed 20 for exciting the radiator 10, a second feed 30 for exciting the radiator 10, a first switching circuit 40 electrically connected between the radiator 10 and ground, and a second switching circuit 50 electrically connected between the radiator 10 and the second feed 30. The antenna assembly 100 can excite the radiator 10 through the first feed source 20 and/or the second feed source 30, so as to realize a wireless transmission function, reduce the number of the radiators 10, and further reduce the occupation of the antenna assembly 100 on the space of the electronic equipment. The antenna assembly 100 is controlled by the first switching circuit 40 and/or the second switching circuit 50, so that mutual interference when the first and second feeds 20 and 30 excite the radiator 10 is reduced.

The terms "first," "second," "third," and the like in this disclosure 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 radiator 10 may be, but is not limited to being, an LDS radiator, or an FPC radiator, or a PDS radiator, or a metal stub radiator. In some embodiments, the radiator 10 may be a structural antenna (MECHANICAL DESIGN ANTENNA, MDA) radiator designed with the electronics' own insert metal.

The shape, structure and material of the radiator 10 are not particularly limited, and the shape of the radiator 10 includes, but is not limited to, a bent shape, a bar shape, a sheet shape, a rod shape, a coating, a film, etc. When the radiator 10 is in a strip shape, the extending track of the radiator 10 is not limited, so the radiator 10 can extend in a straight line, a curve, a multi-section bending track, and the like. The radiator 10 may be a line with a uniform width on the extending track, or may be a line with a gradual width change and a widening area with a different width.

In some embodiments, the total length of the radiator 10 may be 30-70mm. In some embodiments, the total length of the radiator 10 may be 50mm. It will be appreciated that the overall length of the radiator 10 can be adjusted as desired.

The radiator 10 may have a first free end 11, a second free end 12, a first feeding point 13, a ground point 14 and a second feeding point 15. The first feeding point 13, the ground point 14 and the second feeding point 15 may be located between the first free end 11 and the second free end 12. The ground point 14 may be located between the first and second feeding points 13 and 15, and on a side of the second feeding point 15 remote from the second free end 12. That is, the second feeding point 15 may be located between the second free end 12 and the ground point 14.

In some embodiments, the two ends of the radiator 10, such as the first free end 11 and the second free end 12, may each have a gap between the other components. In some scenarios, when the antenna assembly 100 is applied in an electronic device, the first free end 11 and the second free end 12 of the radiator 10 may not be easily held or blocked at the same time with gaps (i.e., two gaps) respectively between other components in the electronic device. Even if one of the two slots is blocked, the radiator 10 can transmit and receive electromagnetic wave signals, so that the antenna assembly 100 can have better communication performance when applied to electronic equipment.

Referring to fig. 1, the radiator 10 may have a linear shape. The first free end 11 and the second free end 12 may be opposite ends of the radiator 10. In other embodiments, the radiator 10 may be bent. The first free end 11 and the second free end 12 may not be opposed in a straight direction. The first free end 11 and the second free end 12 may be both ends of the radiator 10. In some embodiments, the distance between the first free end 11 and the second free end 12 on the extended trajectory of the radiator 10 may be the total length of the radiator 10.

Referring to fig. 1, the first feed 20 may be directly or indirectly connected to the first feeding point 13. The first feed 20 may excite the radiator 10 to support a first frequency band. In some embodiments, the first frequency band may be a medium-high frequency band or a low frequency band. In some embodiments, the first frequency band may be a long term evolution (Long Term Evolution, LTE) frequency band. In some embodiments, the first frequency band may be an LTE low frequency band. In some embodiments, the first frequency band may be the LTE B20 frequency band (791 MHz-861 MHz).

In some embodiments, the first feed 20 may excite a radiating portion of the radiator 10 located between the second free end 12 and the first feed point 13 to produce a first resonant mode supporting the first frequency band.

In some embodiments, the first resonant mode may be an inverted F Antenna (IFA, inverted-F Antenna) mode.

In some embodiments, the current of the first resonant mode may include a current I1 flowing from the first feed point 13 to the second free end 12.

Referring to fig. 1, the second feed 30 may be indirectly connected to the second feeding point 15 through the second switching circuit 50. The second feed 30 may excite the radiator 10 to support a second frequency band. In some embodiments, the second frequency band may be a medium-high frequency band or a low frequency band. In some embodiments, the second frequency band may be an LTE frequency band. In some embodiments, the second frequency band may be a high frequency band in LTE. In some embodiments, the fourth frequency band may be at least one of an LTE B3 frequency band, an LTE B1 frequency band, an LTE B39 frequency band, an LTE B40 frequency band, or an LTE B41 frequency band.

In some embodiments, the second feed 30 may excite a radiating portion of the radiator 10 located between the second free end 12 and the ground point 14 to produce a second resonant mode supporting the second frequency band.

Referring to fig. 1, the first switching circuit 40 is electrically connected to the grounding point 14, so that the grounding point 14 is grounded through the first switching circuit 40. The first switching circuit 40 may be used to promote isolation between the first feed 20 and the second feed 30.

In some embodiments, the first switching circuit 40 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. 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.

In some embodiments, the first switching circuit 40 may comprise a single pole single throw switch. The single pole single throw switch is electrically connected between the grounding point 14 and the ground, so that the grounding point 14 is grounded through the single pole single throw switch, and the grounding point 14 is connected with or disconnected from the ground.

In some embodiments, the first switching circuit 40 may enable the ground point 14 to be switched on or off from ground. In some embodiments, the first switching circuit 40 may enable the ground point 14 to be grounded, thereby enabling the second feed 30 to energize the radiator 10 to support the second frequency band. In some embodiments, the first switching circuit 40 may effect disconnection of the ground point 14 from ground, thereby enabling the first feed 20 to energize the radiator 10 to support the first frequency band. For example, when the ground point 14 is disconnected from ground and the first and second feeds 20, 30 also have isolation between the first and second frequency bands that does not interfere, the first feed 20 may excite the radiator 10 to support the first frequency band.

Referring to fig. 1, the second switching circuit 50 may electrically connect the second feed 30 and the second feeding point 15 indirectly. The second switching circuit 50 can adjust the frequency of the second frequency band.

The second switching circuit 50 may be used to promote isolation between the first feed 20 and the second feed 30.

In some embodiments, the second switching circuit 50 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. 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.

In some embodiments, the second switching circuit 50 may enable the second feed 30 to be switched on or off from the second feed point 15. In some embodiments, the second switching circuit 50 may enable the second feed 30 to be in communication with the second feed point 15, thereby enabling the second feed 30 to excite the radiator 10 to support the second frequency band. For example, where the ground point 14 is connected to ground and the second feed 30 is connected to the second feed point 15, such that the first feed 20 and the second feed 30 also have isolation from interference in the first frequency band and the second frequency band, the second feed 30 may excite the radiator 10 to support the second frequency band. In some embodiments, the second switching circuit 50 may implement the second feed 30 to be disconnected from the second feed point 15, thereby enabling the first feed 20 to excite the radiator 10 to support the first frequency band. For example, the ground point 14 is disconnected from ground and the second feed 30 is disconnected from the second feed point 15, so that the first feed 20 and the second feed 30 also have isolation from interference of the first frequency band and the second frequency band, and the first feed 20 can excite the radiator 10 to support the first frequency band.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating a configuration of the second feed 30 and the second switching circuit 50 shown in fig. 1, which are matched in some embodiments. The second switching circuit 50 may comprise a switch 51 and at least one frequency selective branch 52.

The changeover switch 51 has a common terminal 511 electrically connected to the second feeding point 15, a plurality of connection terminals 512, and a changeover portion 513. The switching part 513 may be electrically connected to the common terminal 511. The switching section 513 may be electrically connected to one connection 512 under control of a control signal (which may be from an electronic device such as a processor or from other electronic devices).

One end of each frequency selective branch 52 is electrically connected to one connecting end 512 in a one-to-one correspondence, the other end of one frequency selective branch 52 is electrically connected to the second feed 30, and the other ends of the remaining frequency selective branches 52 are grounded.

Referring to fig. 2, the switching portion 513 is selectively electrically connected to different connection ends 512, so that one end of each of the frequency selective branches 52 is electrically connected to the second feeding point 15, and the other end is grounded, so that the radiating portion of the radiator 10 between the grounding point 14 and the second free end 12 has different effective electrical lengths in different states.

It should be understood that the illustrated number of frequency selective circuits 52 in the illustrations should not be construed as limiting the number of frequency selective circuits 52 provided by embodiments of the present application.

In some embodiments, each frequency selective branch 52 may include a capacitance, or an inductance, or a combination of capacitance and inductance.

In an embodiment, when frequency selective branches 52 are plural, each frequency selective branch 52 may be different, such that the degree of adjustment to the electrical length of radiator 10 is different when different frequency selective branches 52 are electrically connected to radiator 10. Further, the frequency selection is switched between a plurality of sub-bands in the second band, for example, LTE B3 band, LTE B1 band, LTE B39 band, LTE B40 band, LTE B41 band, and the like.

It should be noted that, the frequency selective branches 52 are different, and the devices included in each frequency selective branch 52 may be different; or the included devices are the same, but the connection relation between the devices is different; or the devices included are identical and the connection relationship is identical, but the parameters (such as capacitance, or inductance) of the devices are different.

In addition, since the radiator 10 supports more sub-bands in the second frequency band, the number of frequency selective branches 52 is generally greater than or equal to two in order to achieve better adjustment of the LB frequency band.

It should be understood that the number of the switches 51 in fig. 2 may be plural, and each frequency selecting branch 52 is electrically connected to one switch 51 in a one-to-one correspondence. Referring to fig. 3, fig. 3 is a schematic diagram of a structure of the second switching circuit 50 in another embodiment of the antenna assembly 100 in the embodiment shown in fig. 2. Each frequency selective branch 52 is electrically connected to one of the switches 51 in a one-to-one correspondence.

In some embodiments, because one frequency selective branch 52 is electrically connected to the second feed 30, the frequency selective branch 52 electrically connected to the second feed 30 may be referred to as a matching circuit.

In some embodiments, frequency selective branch 52 may include a first frequency selective branch 521, a second frequency selective branch 522, a third frequency selective branch 523, and a fourth frequency selective branch 524. Wherein, one end of each of the first frequency-selecting branch 521, the second frequency-selecting branch 522 and the third frequency-selecting branch 523 is electrically connected to one of the connection terminals 512, and the other end is grounded. The fourth frequency selective branch 524 is electrically connected between one of the connection terminals 512 and the second feed 30, such that the second feed 30 is electrically connected to one of the connection terminals 512 through the fourth frequency selective branch 524.

In some embodiments, the first frequency selective branch 521, the second frequency selective branch 522, and the third frequency selective branch 523 may each be an inductor.

In some embodiments, fourth frequency selective branch 524 may be capacitive to enable capacitively coupled feeding of radiator 10 under second feed 30.

In some embodiments, the switch 51 is all open, such that the second feed 30 is disconnected from the second feed point 15, thereby enabling the first feed 20 to energize the radiator 10 to support the first frequency band.

In an embodiment, referring to fig. 2 and 3, taking the LTE B3 band, the LTE B1 band, the LTE B39 band, the LTE B40 band, and the LTE B41 band as examples, when the frequency is selected by the first frequency selecting branch 521, the second frequency selecting branch 522, the third frequency selecting branch 523, and the fourth frequency selecting branch 524, the following table is shown:

Referring to fig. 4, fig. 4 is a schematic structural diagram of the antenna assembly 100 shown in fig. 1 in another embodiment. The radiator 10 may also have a third feeding point 16 located between the first free end 11 and the first feeding point 13. Accordingly, the antenna assembly 100 may also include a third feed 60. The third feed 60 may be indirectly connected to the third feed point 16. The third feed 60 may excite the radiator 10 to support a third frequency band.

In some embodiments, the third frequency band may be a medium-high frequency band or a low frequency band.

In some embodiments, the third frequency band may be a WiFi frequency band, an NR frequency band.

In some embodiments, the third frequency band may comprise the first frequency sub-band.

In some embodiments, the first sub-band is greater than the first band.

In some embodiments, the first sub-band may be an NR band. In some embodiments, the first sub-band may be an NR high frequency band. In some embodiments, the first sub-band may be the N78 band (3.4 GHz-3.6 GHz).

In some embodiments, the third feed 60 may excite the radiating portion between the first feed point 13 and the first free end 11 to produce a third resonant mode supporting the first sub-band.

In some embodiments, the third resonant mode may be a left-hand antenna mode (a mode of a composite left-hand transmission line structure). In some embodiments, the third resonant mode may be a 1/4 wavelength left-hand antenna mode.

In some embodiments, the current of the third resonant mode comprises a current I3 flowing from the first feed point 13 to the first free end 11.

In some embodiments, the third frequency band may include a second frequency sub-band.

In some embodiments, the second sub-band may be a WiFi band. In some embodiments, the second sub-band may be a WiFi5G band.

In some embodiments, the third feed 60 may excite the radiating portion between the third feed point 16 and the first free end 11 to produce a fourth resonant mode supporting the second sub-band.

In some embodiments, the fourth resonant mode is an IFA antenna mode. In some embodiments, the fourth resonant mode is an IFA antenna mode of 1/4 wavelength.

In some embodiments, the current of the fourth resonant mode comprises a current I4 flowing from the third feed point 16 to the first free end 11.

Referring to fig. 4, in the antenna assembly 100, a circuit for electrically connecting the first feed 20 to the first feeding point 13 may be set to a high impedance state when the third feed 60 excites the radiator 10 and to a low impedance state when the first feed 20 excites the radiator 10. Further, the antenna assembly 100 may improve the isolation of the first feed 20 from the third feed 60 when the first feed 20 excites the radiator 10.

In some embodiments, in the antenna assembly 100, circuitry that electrically connects the first feed 20 to the first feed point 13 may be configured to be turned off when the third feed 60 excites the radiator 10 and turned on when the first feed 20 excites the radiator 10.

Referring to fig. 4, the antenna assembly 100 may further include a first frequency selection circuit 70 electrically connected between the first feed 20 and the first feed point 13. The first feed 20 may be electrically connected to the first feed point 13 through a first frequency selective circuit 70. That is, the first frequency selection circuit 70 may serve as a circuit that electrically connects the first feed source 20 to the first feed point 13. Further, the first frequency selective circuit 70 may be in a high impedance state when the third feed 60 excites the radiator 10, and in a low impedance state when the first feed 20 excites the radiator 10. In some embodiments, in the antenna assembly 100, the first frequency selective circuit 70 is turned off when the third feed 60 excites the radiator 10 and turned on when the first feed 20 excites the radiator 10.

In some embodiments, the first frequency selection circuit 70 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 value capacitance) and/or an adjustable inductor. 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.

Referring to fig. 5, fig. 5 is a schematic diagram illustrating a configuration of the first feed 20 and the first frequency selection circuit 70 in the embodiment shown in fig. 4. The first frequency selection circuit 70 may have a first end 71 and a second end 72. The first end 71 may be electrically connected to the first feed 20 and the second end 72 may be electrically connected to the first feed point 13.

The first frequency selection circuit 70 may include a first matching circuit 73 and a first filtering circuit 74. One end of the first matching circuit 73 is electrically connected to one end of the first filter circuit 74 to form a first end 71 and a second end 72. That is, the first matching circuit 73 and the first filtering circuit 74 may be both electrically connected between the first feeding point 13 and the ground, and the first feed 20 may be directly electrically connected with the first feeding point 13, so that the first feeding point 13 may be grounded through the first matching circuit 73 and the first filtering circuit 74, respectively.

In some embodiments, the first filter circuit 74 may control the first frequency selective circuit 70 to be in a high impedance state when the third feed 60 excites the radiator 10 and to be in a low impedance state when the first feed 20 excites the radiator 10. In some embodiments, the first filter circuit 74 may control the first frequency selective circuit 70 to be in an open state when the third feed 60 excites the radiator 10 and to be in a short state when the first feed 20 excites the radiator 10. In some embodiments, the first filter circuit 74 may control the first frequency selective circuit 70 to be off when the third feed 60 excites the radiator 10 and on when the first feed 20 excites the radiator 10.

In some embodiments, the first matching circuit 73 may include a first inductance L1 electrically connected between the second terminal 72 and ground. The second terminal 72 is grounded through the first inductor L1.

In some embodiments, the first filter circuit 74 may include a first capacitance C1 electrically connected between the second terminal 72 and ground. The second terminal 72 is grounded through the first capacitor C1. The first capacitor C1 may form a low-pass high-resistance filter circuit. That is, the first filter circuit 74 may be a low-pass, high-resistance filter circuit that increases the isolation between the first feed 20 and the third feed 60.

In some embodiments, the first capacitor C1 may pass the current I3 when the radiator 10 supports a third frequency band, such as the first sub-band. Specifically, the current I3 may flow from ground through the first capacitor C1 and to the first feeding point 13. The first capacitor C1 can be a virtual ground point.

In some embodiments, the capacitance of the first capacitor C1 is 2.7pF.

Referring to fig. 4, in the antenna assembly 100, the circuit for electrically connecting the third feed 60 to the third feed point 16 may be configured to be in a low impedance state when the third feed 60 excites the radiator 10 and to be in a high impedance state when the first feed 20 excites the radiator 10. Further, the antenna assembly 100 may promote isolation of the third feed 60 from the first feed 20 when the third feed 60 excites the radiator 10.

In some embodiments, in the antenna assembly 100, circuitry electrically connecting the third feed 60 to the third feed point 16 may be configured to be on when the third feed 60 excites the radiator 10 and off when the first feed 20 excites the radiator 10.

Referring to fig. 4, the antenna assembly 100 may further include a second frequency selective circuit 80 electrically connected between the third feed 60 and the third feed point 16. The third feed 60 may be electrically connected to the third feed point 16 through a second frequency selective circuit 80. That is, the second frequency selective circuit 80 may serve as a circuit that electrically connects the third feed 60 to the third feed point 16. Further, the second frequency selective circuit 80 may be in a low impedance state when the third feed 60 excites the radiator 10, and in a high impedance state when the first feed 20 excites the radiator 10. In some embodiments, in the antenna assembly 100, the second frequency selective circuit 80 may be on when the third feed 60 excites the radiator 10 and may be off when the first feed 20 excites the radiator 10.

In some embodiments, the second frequency selection circuit 80 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 value capacitance) and/or an adjustable inductor. 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.

Referring to fig. 6, fig. 6 is a schematic diagram illustrating a configuration of the third feed 60 and the second frequency selection circuit 80 in the embodiment shown in fig. 4. The second frequency selection circuit 80 may include a second matching circuit 81 and a second filtering circuit 82. One end of the second matching circuit 81 is connected to the third feed 60, and the other end is connected to the second filter circuit 82. One end of the second filter circuit 82 is connected to the other end of the second matching circuit 81, and the other end is connected to the third feeding point 16, so as to realize the series connection of the third feed 60, the second matching circuit 81 and the second filter circuit 82.

In some embodiments, the second matching circuit 81 includes a second capacitor C2 with one end grounded and a third capacitor C3 with one end electrically connected to the other end of the second capacitor C2. The other end of the third capacitor C3 is electrically connected to the second filter circuit 82.

In some embodiments, the second capacitor C2 and the third capacitor C3 can pass the current I4 when the radiator 10 supports the third frequency band, such as the second sub-band. Specifically, the current I4 may flow from ground through the second capacitor C2, the third capacitor C3, the second filter circuit 82 and to the third feeding point 16. The second capacitor C2 can be a virtual ground point.

In some embodiments, the capacitance of the second capacitor C2 may be 1pF.

In some embodiments, the second filter circuit 82 may control the second frequency selective circuit 80 to be in a low impedance state when the third feed 60 excites the radiator 10 and to be in a high impedance state when the first feed 20 excites the radiator 10. In some embodiments, the second filter circuit 82 may control the second frequency selective circuit 80 to be in a short circuit state when the third feed 60 excites the radiator 10 and to be in an open circuit state when the first feed 20 excites the radiator 10. In some embodiments, the second filter circuit 82 may control the second frequency selective circuit 80 to be on when the third feed 60 excites the radiator 10 and to be off when the first feed 20 excites the radiator 10.

Referring to fig. 6, the second filter circuit 82 may include a fourth capacitor C4 electrically connected between the third feeding point 16 and the second matching circuit 81, and a second inductor L2 electrically connected between the third feeding point 16 and the second matching circuit 81. That is, the third feeding point 16 may be electrically connected to the second matching circuit 81 through the fourth capacitor C4 and the second inductor L2, respectively.

In some embodiments, one end of the fourth capacitor C4 and the second inductor L2, which are electrically connected to the second matching circuit 81, are electrically connected to one end of the third capacitor C3. And the fourth capacitor C4 and the second inductor L2 are in parallel resonance to form a low-resistance high-pass filter circuit. That is, the second filter circuit 82 may be a low-resistance high-pass filter circuit, improving isolation between the first feed 20 and the third feed 60.

In some embodiments, the fourth capacitor C4 may circulate a current I4 when the radiator 10 supports a third frequency band, such as a second sub-band. Specifically, the current I4 may flow from ground through the second capacitor C2, the third capacitor C3, the fourth capacitor C4 and to the third feeding point 16.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating an antenna assembly 100 shown in fig. 4 in other embodiments. In the antenna assembly 100, a first resonant mode corresponding to the current I1 may support a first frequency band, such as the LTE B20 frequency band (791 MHz-861 MHz). The second resonant mode corresponding to the current I2 may support a second frequency band such as LTE B1 band, LTE B3 band, LTE B39 band, LTE B40 band, LTE B41 band. A third resonant mode corresponding to current I3 may support a third frequency band, such as a first sub-band (e.g., an N78 band (3.4 GHz-3.6 GHz)). The fourth resonant mode corresponding to current I4 may support a third frequency band, e.g., a second sub-band (such as a WiFi5G band).

Furthermore, the antenna assembly 100 may implement ENDC (dual connectivity (E-UTRAN New radio-Dual Connectivity, ENDC for short) combination of N78 band and WiFi5G band, and ENDC of LTE B20 band and N78 band or WiFi5G band.

When the first feed source 20 excites the radiating part of the radiator 10 located at the second free end 12 and the first feed point 13, the second switching circuit 50 is disconnected relative to the first feed source 20, so that the second feed source 30 does not excite the radiator 10, and the second switching circuit 50 is disconnected relative to the first feed source 20, so that the isolation between the first feed source 20 and the second feed source 30 is good.

When the second feed source 30 excites the radiating portion of the radiator 10 located at the second free end 12 and the ground point 14, the first switching circuit 40 is turned on relative to the second feed source 30, so that the second feed source 30 can excite the radiator 10, and the first feed source 20 cannot excite the radiating portion of the radiator 10 located at the second free end 12 and the ground point 14, and further, the isolation between the first feed source 20 and the second feed source 30 is good.

The third feed 60 may excite the radiator 10 to produce a third resonant mode and a fourth resonant mode. The first frequency selecting circuit 70 and the second frequency selecting circuit 80 are arranged, so that the isolation between the first feed source 20 and the third feed source 60 is good.

The third feed 60 may excite the radiator 10 to produce a third resonant mode and a fourth resonant mode. Under the arrangement of the second frequency selection circuit 80, the distance between the radiating part between the third feed point 16 and the first free end 11 and the radiating part between the grounding point 14 and the second free end 12 are far, and the grounding point 14 at the middle part is grounded, so that the isolation between the third feed source 60 and the second feed source 30 is good.

The first feed source 20, the second feed source 30 and the third feed source 60 have good isolation performance. In addition, good isolation performance exists between the middle-high frequency band and the N78 frequency band, and good isolation performance exists between the middle-high frequency band and the WiFi5G frequency band. Good isolation performance exists between the LTE B20 frequency band and the N78 frequency band, and good isolation performance exists between the LTE B20 frequency band and the WiFi5G frequency band.

The application adopts the scheme of sharing the radiator 10, so that the radiator 10 supports the N78 frequency band+WiFi 5G frequency band, the LTE B20 frequency band, the MHB frequency band and the like, and solves the problem of isolation/coexistence. By sharing the radiator 10, the need for design space for the antenna assembly is reduced.

In some embodiments, referring to fig. 8, fig. 8 is a graph of return loss of the antenna assembly 100 of fig. 7 excited by the second and third feeds 30, 60 in another embodiment, with frequency (GHz) on the horizontal axis and return loss (dB) on the vertical axis. Curve C1 is the return loss curve of the antenna assembly 100 under excitation by the third feed 60. Curve C2 is a return loss curve of the antenna assembly 100 corresponding to the LTE B3 band under excitation of the second feed 30. Curve C3 is a return loss curve of the antenna assembly 100 corresponding to the LTE B1 band under excitation of the second feed 30. Curve C4 is a return loss curve of the antenna assembly 100 corresponding to the LTE B40 band under excitation of the second feed 30. Curve C5 is a return loss curve of the antenna assembly 100 corresponding to the LTE B41 band under excitation of the second feed 30. Wherein the curve C1 is provided with a first mark point (3.6528-14.003) and a second mark point (3.5079-4.2272), the curve C2 is provided with a third mark point (1.7891-12.97), the curve C3 is provided with a fourth mark point (2.022-14.853), the curve C4 is provided with a fifth mark point (2.3557-25.508), and the curve C5 is provided with a sixth mark point (2.5757-20.723). Therefore, the isolation degree of the antenna assembly 100 under the second feed source 30 and the third feed source 60 is good, and the antenna performance on the second frequency band (for example, LTE B3 frequency band, LTE B1 frequency band, LTE B40 frequency band, LTE B41 frequency band) is good, so that the working state is good, and the engineering requirement can be satisfied.

In some embodiments, referring to fig. 9, fig. 9 is a graph of the overall system efficiency (System Total Efficiency) of the antenna assembly 100 of fig. 7 excited by the second and third feeds 30, 60 in another embodiment, with the horizontal axis being frequency (GHz) and the vertical axis being the overall system efficiency (dB). Curve D1 is the overall efficiency curve of the system for the antenna assembly 100 under excitation by the third feed 60. Curve D2 is the overall system efficiency curve for the antenna assembly 100 corresponding to the LTE B3 band under excitation by the second feed 30. Curve D3 is a system overall efficiency curve of the antenna assembly 100 corresponding to the LTE B1 band under excitation of the second feed 30. Curve D4 is a system overall efficiency curve of the antenna assembly 100 corresponding to the LTE B40 band under excitation of the second feed 30. Curve D5 is the overall system efficiency curve for the antenna assembly 100 corresponding to the LTE B41 band under excitation by the second feed 30. Wherein the curve D1 has a first identification point (3.5394, -4.8538), the curve D2 has a second identification point (1.8, -4.2537), the curve D3 has a third identification point (2.0431, -4.6083), the curve D4 has a fourth identification point (2.3794, -4.3104), and the curve D5 has a fifth identification point (2.5982, -401249). Therefore, the isolation degree of the antenna assembly 100 under the second feed source 30 and the third feed source 60 is good, and the antenna performance on the second frequency band (for example, LTE B3 frequency band, LTE B1 frequency band, LTE B40 frequency band, LTE B41 frequency band) is good, so that the working state is good, and the engineering requirement can be satisfied.

In some embodiments, referring to fig. 10, fig. 10 is a graph of return loss of the antenna assembly 100 of fig. 7 excited by the first feed 20 and the third feed 60 in another embodiment. The horizontal axis is frequency (GHz) and the vertical axis is return loss (dB). Curve A1 is the return loss curve of antenna assembly 100 under excitation by third feed 60. Curve A2 is the return loss curve of the antenna assembly 100 under excitation by the first feed 20. Curve A3 is the isolation curve of the antenna assembly 100 under excitation by the first feed 20 and the third feed 60. Wherein the curve A2 has a first marking point (0.8223-12.718), a second marking point (0.8557-3.1137) and a third marking point (0.79122-3.7022). The curve A1 has a fourth mark point (3.4959-6.8451), a fifth mark point (5.4985-12.045) and a sixth mark point (5.2707-4.5778). It can be seen that the antenna assembly 100 has good antenna performance in the first frequency band near the first identification point, and in particular, the antenna performance in the first frequency band between the second identification point and the third identification point. And, the isolation degree of the curve A3 corresponding to the first frequency band between the second identification point and the third identification point is good. The antenna assembly 100 has good antenna performance on the fifth identification point and the second sub-frequency band of the first sub-frequency band near the sixth identification point, and the isolation between the curve A3 and the fourth identification point and the fifth identification is good, so that the working state of the antenna assembly 100 is good, and the engineering requirement can be met.

In some embodiments, referring to fig. 11, fig. 11 is a graph of the overall efficiency of the system in which the antenna assembly 100 of fig. 7 is excited by the first feed 20 and the third feed 60 in another embodiment. The horizontal axis is frequency (GHz) and the vertical axis is system total efficiency (dB). Curve B1 is the overall efficiency curve of the system for the antenna assembly 100 under excitation by the third feed 60. Curve B2 is the overall efficiency curve of the system for the antenna assembly 100 under excitation by the first feed 20. Wherein the curve B2 has a first marking point (0.82073-6.5118), a second marking point (0.85608-9.4712) and a third marking point (0.78743-9.4249). The curve B1 is provided with a fourth mark point (3.4714-3.5651), a fifth mark point (5.2342-5.0804) and a sixth mark point (5.8686-5.0916). It can be seen that the antenna assembly 100 is on the curve B1, and the overall system efficiency corresponding to the first sub-band and the second sub-band is better, and the overall system efficiency corresponding to the first sub-band is better, and the antenna assembly 100 is on the curve B2. Visible. The antenna performance on the first frequency band and the third frequency band is good, and then the working state is good, so that the engineering requirement can be met.

Next, an electronic device to which the antenna assembly 100 of the above-described embodiment can be mounted will be described. The electronic device may be any of a number of electronic devices including, but not limited to, cellular telephones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, calculators, programmable remote controls, pagers, netbooks, personal Digital Assistants (PDAs), portable Multimedia Players (PMPs), moving picture experts group (MPEG-1 or MPEG-2), audio layer 3 (MP 3) players, portable medical devices, and digital cameras, combinations thereof, and the like.

In some embodiments, the electronic device may include, but is not limited to, an electronic device with communication functions such as a mobile phone, an internet device (MID), an electronic book, a portable play station (Play Station Portable, PSP), or a personal digital assistant (personal DIGITAL ASSISTANT, PDA).

Referring to fig. 12, fig. 12 is an exploded view of an electronic device according to an embodiment of the application, the electronic device 200 may include a middle frame assembly 90 provided with an antenna assembly 100, a display 201 disposed on one side of the middle frame assembly 90 for displaying information, a battery cover 202 connected to the other side of the middle frame assembly 90, a circuit board 203 mounted on the middle frame assembly 90 for controlling the display 201 and the antenna assembly 100, and a battery 204 mounted on the middle frame assembly 90 for supplying power for normal operation of the electronic device 200.

The display 201 may be a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) or an Organic Light-Emitting Diode (OLED) display, etc. for displaying information and images.

The material of the middle frame assembly 90 may be a metal such as magnesium alloy, aluminum alloy, stainless steel, etc., but the material is not limited thereto, and may be other insulating materials such as hard materials. The middle frame assembly 90 may be interposed between the display 201 and the battery cover 202. The middle frame assembly 90 may be used to carry a display screen 201. The middle frame assembly 90 is snap-fit connected with the battery cover 202 to form a main housing 205 of the electronic device 200, and a receiving cavity is formed inside the main housing 205. The receiving cavity may be used to receive electronic components such as a camera, a circuit board 203, a battery 204, a processor (disposed on the circuit board 203 and, therefore, may be part of the circuit board 203 in some embodiments), the antenna assembly 100, and various types of sensors in the electronic device 200.

The circuit board 203 is installed in the accommodating chamber, and can be installed at any position in the accommodating chamber. The circuit motherboard 203 may be a motherboard of the electronic device 200. The processor of the electronic device 200 may be provided on the circuit motherboard 203. One, two or more of the functional components such as a motor, a microphone, a speaker, a receiver, an earphone interface, a universal serial bus interface (USB interface), a camera, a distance sensor, an ambient light sensor, and a gyroscope may be integrated on the circuit board 203. Meanwhile, the display screen 201 may be electrically connected to the circuit board 203.

The battery 204 is mounted in the receiving cavity and may be mounted anywhere within the receiving cavity. The battery 204 may be electrically connected to the circuit motherboard 203 to enable the battery 204 to power the electronic device 200. The circuit motherboard 203 may have a power management circuit disposed thereon. The power management circuit is used to distribute the voltage provided by the battery 204 to various electronic components in the electronic device 200, such as the display 201.

The battery cover 202 may be made of the same material as the middle frame assembly 90, although other materials may be used. The battery cover 202 may be integrally formed with the middle frame assembly 90. In some embodiments, battery cover 202 may wrap around middle frame assembly 90, and may carry display 201. The battery cover 202 may have a rear camera hole, a fingerprint recognition module mounting hole, and the like.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Referring to fig. 12 and 13, fig. 13 is a schematic structural diagram of a frame assembly 90 in the embodiment shown in fig. 12. The middle frame assembly 90 may include a substrate 91 for carrying a display screen 201 and a bezel 92 surrounding the substrate 91. Wherein the substrate 91 is disposed opposite to the battery cover 202. The bezel 92 may be adapted for snap-fit connection with the battery cover 202. That is, the substrate 91, the frame 92, and the battery cover 202 define a housing chamber.

The substrate 91 may be a conductive metal, but may be other materials. A ground plane and a feed source may be provided on the substrate 91. The ground plane acts as ground. In some embodiments, the ground plane and feed may not be disposed on the substrate 91, but directly on the circuit motherboard 203. In some embodiments, the substrate 91 may be omitted.

The bezel 92 may be a conductive metal, so the bezel 92 may also be referred to as a "metal bezel". Of course, the frame 92 may be made of other materials, such as an insulating material. The frame 92 may be made of the same material as the substrate 91. The frame 92 may include a first frame 921, a second frame 922, a third frame 923, and a fourth frame 924 connected end to end in sequence. The first frame 921, the second frame 922, the third frame 923, and the fourth frame 924 are disposed around the substrate 91 and can be connected and fixed to the substrate 91. In some embodiments, the bezel 92 may be of unitary construction with the battery cover 202. For example, the frame 92 extends from the edge of the battery cover 202 to the display 201 to be fastened to the display 201.

In some embodiments, the first bezel 921, the second bezel 922, the third bezel 923, and the fourth bezel 924 enclose a rounded rectangle. Of course, other shapes such as circular, triangular, etc. are also possible. In some embodiments, the first frame 921 is disposed opposite the third frame 923, and the second frame 922 is disposed opposite the fourth frame 924.

In some embodiments, the lengths of both the first frame 921 and the third frame 923 are shorter than the length of the second frame 922 and shorter than the length of the fourth frame 92.

It will be appreciated that the center assembly 90 and battery cover 202 may comprise a main housing 205. In some embodiments, the main housing may not be limited to the middle frame assembly 90 and the battery cover 202, but may include other components, which are not described in detail.

Please refer to fig. 13. The antenna assembly 100 may be mounted on the center frame assembly 90. In some embodiments, the antenna assembly 100 may be part of the middle frame assembly 90. Of course, in some embodiments, the antenna assembly 100 may also be mounted in other locations of the main housing 205, such as on the battery cover 202. In some embodiments, the antenna assembly 100 may be machined from the main housing 205. For example, the antenna assembly 100 appears as a slot antenna. In some embodiments, the antenna assembly 100 may be directly secured to the main housing 205.

The radiator 10 is arranged at a frame 92, for example a first frame 921. It will be appreciated that the antenna assembly 100 may further include a second radiator 101 and a third radiator 102.

In some embodiments, the second radiator 101 and the third radiator 102 are located at two sides of the radiator 10 and may be spaced apart from the radiator 10.

In some embodiments, the second radiator 101 is disposed on the first frame 921 and the fourth frame 924.

In some embodiments, the third radiator 102 is disposed on the first bezel 921 and the second bezel 922.

In an embodiment, the first feed 20, the second feed 30, and the third feed 60 may be feeds on the substrate 91 or the circuit motherboard 203. The radiator 10 can be connected with the feed source through the antenna spring plate.

In one embodiment, the ground may be a ground plane on the substrate 91 or the circuit motherboard 203. The radiator 10 can be connected with the ground through the antenna spring.

A slit 901 is provided between the first frame 921 and the substrate 91. The slit 901 may be extended toward the second frame 922 and the fourth frame 924 in the extending direction of the first frame 921, so as to be formed between the first frame 921 and the substrate 91, for example, a ground plane, and a part or all of the first frame 921 may serve as the radiator 10.

In some embodiments, the slit 901 may extend toward the second frame 922 in the extending direction of the first frame 921, so as to form between the second frame 922 and the substrate 91, such as a ground plane, and further, a portion of the first frame 921 and a portion of the second frame 922 serve as the third radiator 102.

In some embodiments, the slit 901 may extend to one side of the fourth frame 924 in the extending direction of the first frame 921, so as to form between the fourth frame 924 and the substrate 91, for example, a ground plane, and further, a portion of the first frame 921 and a portion of the fourth frame 924 serve as the second radiator 101.

The radiator 10 of the present application uses the first frame 921, so that the performance loss of the antenna assembly 100 by a human hand can be effectively improved.

It is understood that in order to secure the connection strength between the substrate 91 and the frame 92, for example, the first frame 921, the radiator 10. An insulating material, such as a resin, may be filled between the gaps 901 to realize that the radiator 10 in the antenna assembly 100 is a part of the frame 92, such as the first frame 921, and further improve the appearance of the electronic device 200.

The application adopts the scheme of sharing the radiator, solves the problem of isolation/coexistence, ensures that the total system efficiency of the antenna assembly 100 is good, reduces the requirement of the antenna assembly 100 on the design space of the electronic equipment 200, and has important engineering application benefits.

Next, referring to fig. 14, fig. 14 is a schematic structural diagram of an electronic device 300 according to an embodiment of the 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., the antenna assembly 100 in the above-described embodiments), memory 320, input unit 330, display unit 340 (e.g., the display 201 in the above-described embodiments), sensor 350, audio circuitry 360, wiFi module 370, processor 380, and power supply 390 (e.g., the battery 204 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 in one processing unit, each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The foregoing description is only illustrative of the present application and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present application.

Claims

1. An antenna assembly, comprising:

2. The antenna assembly of claim 1, wherein when the first switching circuit controls the ground point to be disconnected from ground and the second switching circuit controls the second feed point to be disconnected from the second feed, the first feed is configured to excite a radiating portion of the radiator located between the first feed point and the second free end to support the first frequency band.

3. The antenna assembly of claim 1, wherein when the first switching circuit controls the ground point to be on with ground and the second switching circuit controls the second feed point to be on with the second feed, the second feed is configured to excite a radiating portion of the radiator located between the ground point and the second free end to support the second frequency band.

4. An antenna assembly according to any of claims 1-3, wherein the first switching circuit comprises:

A single pole single throw switch electrically connected between the ground point and ground such that the ground point is grounded through the single pole single throw switch.

5. The antenna assembly of any of claims 1-3, wherein the first feed is configured to excite a radiating portion of the radiator located between the first feed point and the second free end to produce a first resonant mode supporting the first frequency band, the first resonant mode being an inverted-F antenna IFA antenna mode, a current of the first resonant mode comprising a current flowing from the first feed point to the second free end.

6. The antenna assembly of any of claims 1-3, wherein the second feed is configured to excite a radiating portion of the radiator located between the ground point and the second free end to produce a second resonant mode supporting the second frequency band, the second resonant mode being a left-hand antenna mode, a current of the second resonant mode comprising a current flowing from the ground point to the second free end.

7. An antenna assembly according to any of claims 1-3, wherein the second switching circuit is configured to adjust the frequency of the second frequency band.

8. The antenna assembly of claim 7, wherein the second switching circuit comprises:

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

And one end of each frequency selecting branch is electrically connected with the connecting ends in one-to-one correspondence, the other end of one frequency selecting branch is electrically connected with the second feed source, and the other ends of the rest frequency selecting branches are grounded.

9. The antenna assembly of claim 8, wherein each of the at least one frequency selective branches comprises a capacitance or an inductance.

10. The antenna assembly of claim 1, wherein the radiator has a third feed point located between the first free end and the first feed point, the antenna assembly further comprising:

And the third feed source is electrically connected with the third feed point and is used for exciting the radiator so as to support a third frequency band.

11. The antenna assembly of claim 10, wherein the third frequency band comprises a first sub-band, the third feed configured to excite a radiating portion of the radiator located between the first feed point and the first free end to produce a third resonant mode supporting the first sub-band, the third resonant mode being a left-hand antenna mode, a current of the third resonant mode comprising a current flowing from the first feed point to the first free end.

12. The antenna assembly of claim 11, wherein the first sub-band comprises a new air interface N78 band.

13. The antenna assembly of claim 11, wherein the first feed is configured to excite a radiating portion of the radiator located between the first feed point and the second free end to produce a first resonant mode supporting the first frequency band, the first frequency band being smaller than the first frequency sub-band.

14. The antenna assembly of claim 10, wherein the third frequency band comprises a second frequency sub-band, the third feed configured to excite a radiating portion of the radiator located between the third feed point and the first free end to produce a fourth resonant mode supporting the second frequency sub-band, the fourth resonant mode being an IFA antenna mode, a current of the fourth resonant mode comprising a current flowing from the third feed point to the first free end.

15. The antenna assembly of claim 14, wherein the second sub-band comprises a WiFi5G band.

16. The antenna assembly of any of claims 10-15, wherein the circuitry electrically connecting the first feed to the first feed point is configured to be in a high impedance state when the third feed excites the radiator and to be in a low impedance state when the first feed excites the radiator, and the circuitry electrically connecting the third feed to the third feed point is configured to be in a high impedance state when the first feed excites the radiator and to be in a low impedance state when the third feed excites the radiator.

17. The antenna assembly of claim 16, wherein the circuitry electrically connecting the first feed to the first feed point is configured to be turned off when the third feed excites the radiator and turned on when the first feed excites the radiator, and the circuitry electrically connecting the third feed to the third feed point is configured to be turned off when the first feed excites the radiator and turned on when the third feed excites the radiator.

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

The first frequency selection circuit is electrically connected between the first feed source and the first feed point, so that the first feed source is electrically connected with the first feed point through the first frequency selection circuit, and the first frequency selection circuit is configured to be in a high-impedance state when the third feed source excites the radiator and to be in a low-impedance state when the first feed source excites the radiator.

19. The antenna assembly of claim 18, wherein the first frequency selective circuit comprises:

a first matching circuit;

One end of the first filter circuit is connected with one end of the first matching circuit in a matched mode to form one end of the first frequency selection circuit connected with the first feed source and the other end of the first frequency selection circuit connected with the first feed point, the other end of the first matching circuit and the other end of the first filter circuit are grounded, and the first filter circuit is configured to control the first frequency selection circuit to be in an open circuit state when the third feed source excites the radiator and to be in a short circuit state when the first feed source excites the radiator.

20. The antenna assembly of claim 19, wherein the first matching circuit comprises:

and the first inductor is electrically connected between the first feeding point and the ground so that the first feeding point is grounded through the first inductor.

21. The antenna assembly of claim 19, wherein the first filter circuit comprises:

and the first capacitor is electrically connected between the first feeding point and the ground, so that the first feeding point is grounded through the first capacitor.

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

A first matching circuit electrically connected between the first feeding point and ground so that the first feeding point is grounded through the first matching circuit; and

The first filter circuit is electrically connected between the first feed point and the ground, so that the first feed point is grounded through the first filter circuit, the third feed source is configured to excite a radiation part, located between the first feed point and the first free end, on the radiator to generate a third resonance mode, and current in the third resonance mode comprises current flowing through the first filter circuit, the first feed point and the first free end from the ground.

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

the second frequency selection circuit is electrically connected between the third feed source and the third feed point, so that the third feed source is electrically connected with the third feed point through the second frequency selection circuit, and the second frequency selection circuit is configured to be in a high-impedance state when the first feed source excites the radiator and in a low-impedance state when the third feed source excites the radiator.

24. The antenna assembly of claim 23, wherein the second frequency selective circuit comprises:

one end of the second matching circuit is connected with the third feed source;

And one end of the second filter circuit is electrically connected with the other end of the second matching circuit, the other end of the second filter circuit is electrically connected with the third feed point, and the second filter circuit is configured to be in an open circuit state when the first feed source excites the radiator and in a short circuit state when the third feed source excites the radiator.

25. The antenna assembly of claim 24, wherein the second matching circuit comprises:

a second capacitor electrically connected between the third feed and ground to ground the third feed through the second capacitor; and

And the third capacitor is electrically connected between the third feed source and the second filter circuit, so that the third feed source is electrically connected with the second filter circuit through the second capacitor.

26. The antenna assembly of claim 24, wherein the second filter circuit comprises:

a fourth capacitor electrically connected between the second matching circuit and a third feeding point, so that the second matching circuit is electrically connected with the third feeding point through the fourth capacitor; and

And the second inductor is electrically connected between the second matching circuit and the third feeding point, so that the second matching circuit is electrically connected with the second inductor through the fourth capacitor.

27. An antenna assembly, comprising:

28. A center assembly, comprising:

A substrate provided with a ground plane;

the frame is arranged around the substrate in a surrounding mode; and

An antenna assembly as claimed in any one of claims 1 to 27, wherein the radiator is disposed on the bezel and a gap is provided between the radiator and the ground plane.

29. An electronic device, comprising:

A middle frame assembly comprising:

A substrate;

the antenna assembly of any of claims 1-27, the radiator disposed on the first bezel;