CN115149252A

CN115149252A - Antenna assembly, middle frame assembly and electronic equipment

Info

Publication number: CN115149252A
Application number: CN202210875860.4A
Authority: CN
Inventors: 刘池
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-10-04

Abstract

The application discloses antenna module, center subassembly and electronic equipment relates to communication technology field. In the antenna assembly, a first radiator is provided with a first free end, a second free end, a first feeding point located between the first free end and the second free end and an isolation point located between the first feeding point and the first free end, the first feeding point receives a first excitation signal, the first free end is grounded, and the second radiator is provided with a third free end arranged at an interval with the first free end and a second feeding point receiving a second excitation signal; the isolation circuit is connected with the isolation point, and the isolation circuit is in a low impedance state under the working frequency band of the first excitation signal. The isolation circuit is used for adjusting, so that the first excitation signal can work between the second free end and the isolation point, the isolation between the first radiator and the second radiator is improved through the distance between the first free end and the isolation point, and the antenna performance of the antenna assembly is further improved.

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

An antenna assembly in an electronic device is generally provided with at least two radiators, and when the distance between the two radiators is reduced, the isolation between the two radiators when the two radiators work in the same or adjacent frequency bands is also reduced, thereby affecting the antenna performance of the antenna assembly.

Disclosure of Invention

The technical problem that this application will be solved provides an antenna module, includes:

a first radiator having a first free end, a second free end, a first feeding point located between the first free end and the second free end, and an isolation point located between the first feeding point and the first free end, wherein the first feeding point is configured to receive a first excitation signal, and the first free end is grounded;

the second radiator is provided with a third free end arranged at an interval with the first free end and a second feeding point used for receiving a second excitation signal; and

an isolation circuit connected to the isolation point, the isolation circuit configured to exhibit a low impedance state in an operating frequency band of the first excitation signal.

The technical problem that this application will be solved provides a center subassembly, includes:

a substrate;

the frame is connected with the substrate and surrounds the substrate; and

as described above, the first radiator and the second radiator are disposed on the bezel.

The technical problem that this application will solve provides an electronic equipment, its characterized in that includes:

the center, include:

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 sequentially connected end to end and arranged around the substrate in an enclosing mode, 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 that of the second frame and shorter than that of the fourth frame;

according to the antenna assembly, the first radiator is disposed on the first border, and the second radiator is disposed at least on the first border and on a side of the first radiator away from the fourth border;

the battery cover is covered 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, the battery cover is provided with a camera metal decoration part, the camera metal decoration part is positioned at the part of the battery cover connected with the first frame, and the orthographic projection of the first frame is positioned on one side of the first radiator far away from the second radiator; and

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.

Adopt this application technical scheme, the beneficial effect who has does: according to the antenna assembly, the isolation point is arranged between the first feeding point and the first free end to connect the isolation circuit, the isolation circuit is adjusted to enable the first excitation signal to work between the second free end and the isolation point, the isolation degree between the first radiator and the second radiator is improved through the distance between the first free end and the isolation point, and the antenna performance of the antenna assembly is further improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic diagram of an antenna assembly according to an embodiment of the present application;

FIG. 2 is a schematic diagram of another embodiment of the antenna assembly shown in FIG. 1;

FIG. 3 is a schematic diagram of another embodiment of the antenna assembly of FIG. 1;

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

FIG. 5 is a graph comparing return loss of the antenna assembly of FIG. 1 and the antenna assembly of FIG. 2 in one embodiment;

FIG. 6 is a graph comparing return loss of the antenna assembly of FIG. 1 and the antenna assembly of FIG. 2 in one embodiment;

fig. 7 is a return loss curve diagram of the first radiator 10 in fig. 1 in the first resonant mode L1 according to an embodiment;

FIG. 8 is a graph comparing the overall efficiency of the system of FIG. 1 and FIG. 2 in one embodiment;

FIG. 9 is a schematic diagram of an alternative embodiment of the antenna assembly of FIG. 1;

FIG. 10 is an exploded view of an electronic device in an embodiment of the present application;

FIG. 11 is a rear view of the electronic device of the embodiment shown in FIG. 10;

FIG. 12 is a schematic view of the structure of the frame assembly of the embodiment of FIG. 10;

FIG. 13 is a schematic structural view of a frame assembly of the embodiment of FIG. 10 in another embodiment;

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

Detailed Description

The present application will be described in further detail with reference to the accompanying drawings and embodiments. In particular, the following embodiments are merely illustrative of the present application, and do not limit the scope of the present application. Likewise, the following embodiments are only some embodiments of the present application, not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work 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 can be included in at least one embodiment of the application. The appearances of the phrase 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The present application provides an antenna assembly. The antenna assembly can be applied to electronic equipment. The antenna assembly can at least support one of a Global Positioning System (GPS) frequency band, a Wireless-Fidelity (WiFi) frequency band, a medium-high frequency band and a radio frequency Noise (NR) frequency band. In the antenna assembly, the isolation between the two radiators can be adjusted through the isolation circuit, so that the respective working frequency bands of the two radiators are well isolated, and the antenna performance of the antenna assembly is further improved.

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 that are 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 (e.g., 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 arranged to communicate over 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, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an antenna element 100 according to an embodiment of the present application. The antenna assembly 100 may be one or a mixture of Flexible Printed Circuit (FPC) antenna, laser Direct Structuring (LDS) antenna, print Direct Structuring (PDS) antenna, and metal frame antenna. Of course, the antenna assembly 100 may also be other types of antennas, which are not described in detail. The embodiment of the application takes a metal frame antenna as an example for introduction.

The antenna assembly 100 may include a first radiator 10 and a second radiator 20 spaced apart from the first radiator 10. The first radiator 10 and the second radiator 20 may respectively operate at respective operating frequency bands. In some embodiments, the first radiator 10 and the second radiator 20 have better isolation without affecting each other.

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

Referring to fig. 1, the first radiator 10 has a first free end 11 close to the second radiator 20 and a second free end 12 far from the second radiator 20. That is, the first free end 11 and the second free end 12 may be opposite ends of the first radiator 10, and the first radiator 10 is spaced apart from the second radiator 20 at the first free end 11.

In some embodiments, the first free end 11 may be grounded to mention the effect of isolating the first radiator 10 from the second radiator 20. Furthermore, the first free end 11 may also be referred to as "ground".

The first free end 11 is spaced apart from the second radiator 20. I.e. a gap is provided between the first free end 11 and the second radiator 20.

The second free end 12 is located at a side of the first free end 11 away from the second radiator 20.

The first radiator 10 has a first feeding point 13 located between the first free end 11 and the second free end 12 to receive a first excitation signal, so that the first excitation signal excites the first radiator 10.

In some embodiments, the first feeding point 13 may be connected to a first matching circuit 14, and the first matching circuit 14 may be connected to a first feed 15. It will be appreciated that the first matching circuit 14 and the first feed 15 may also be part of the antenna assembly 100.

The first matching circuit 14 may support a GPS frequency band and/or a WiFi frequency band of the antenna assembly 100. The first matching circuit 14 may comprise a switch control unit and/or a load circuit, or a tunable capacitor and/or a tunable inductor, or a tunable capacitor and/or a switch control unit. In an embodiment, the switch control unit may be a switch chip with a switching function, and may also be a single-pole multi-throw switch or a single-pole single-throw switch. In some embodiments, the first matching circuit 14 may be omitted and the first feed point 13 may be connected to the first feed 15.

The first feed 15 may be used to generate a first excitation signal to excite the first radiator 10 to generate a resonant mode supporting a GPS band and/or a WiFi band. The first driving signal may flow to the first radiator 10 through the first matching circuit 14.

The first radiator 10 has an isolation point 16 located between the first feeding point 13 and the first free end 11, and the isolation point 16 is connected to an isolation circuit 17, so that the isolation between the first radiator 10 and the second radiator 20 is improved by setting the isolation point 16 and adjusting with the isolation circuit 17. It is understood that the isolation circuit 17 may be part of the antenna assembly 100.

The isolation circuit 17 may have a low impedance state in the first frequency band supported by the antenna assembly 100, so as to increase the isolation between the first radiator 10 and the second radiator 20 by increasing the length A1 of the isolation ground between the isolation point 16 and the first free end 11. That is, the first free end 11 is grounded via a grounding member 111 (e.g., a wire, a conductive member, etc.). In addition, the isolation circuit 17 and the ground 111 may form an equivalent ground path for the first driving signal when the isolation circuit 17 has a low impedance state. In a direction parallel to the first radiator 10, the width of the equivalent ground path is a length A1 of the isolation ground between the isolation point 16 and the first free end 11, and the equivalent ground path can improve the isolation between the first radiator 10 and the second radiator 20.

Referring to fig. 1 and 2 together, fig. 2 is a schematic structural diagram of the antenna element 100 shown in fig. 1 in another embodiment. The antenna assembly 100 in fig. 2 is not provided with the isolation point 16 and the isolation circuit 17 in fig. 1, and when the first radiator 10 in fig. 1 and the first radiator 10 in fig. 2 are both in the first frequency band, the length A1 of the isolation ground between the isolation point 16 and the first free end 11 in fig. 1, the length A2 of the isolation ground at the first free end 11 in fig. 2, and A1 is greater than A2. Furthermore, the arrangement of the isolation point 16 and the isolation circuit 17 increases the length of the first radiator 10 spaced apart from the second radiator 20 in the first frequency band, thereby increasing the isolation between the first radiator 10 and the second radiator 20 in the first frequency band.

It can be understood that, in fig. 2, the length A2 of the isolation ground at the first free end 11 is the width of the ground 111 in the direction parallel to the first radiator 10, and in the direction parallel to the first radiator 10, the width of the equivalent ground path (i.e. the length A1 of the isolation ground between the isolation point 16 and the first free end 11 is increased) is greater than the width of the ground (i.e. the length A2 of the isolation ground).

In addition, the isolation between the first radiator 10 and the second radiator 20 in the first frequency band can be adjusted by adjusting the length A1. For example, the length A1 is increased, so that the isolation effect between the first radiator 10 and the second radiator 20 in fig. 1 is further improved. The isolation between the first radiator 10 and the second radiator 20 in other frequency bands can also be achieved by adjusting the isolation circuit 17, which is not described herein.

In some embodiments, the isolation circuit 17 may include a switch control unit and/or an adjustable capacitor and/or an adjustable inductor. In some embodiments, the tunable capacitor in the isolation circuit 17 may be replaced with a fixed value capacitor. In some embodiments, the adjustable inductor in the isolation circuit 17 may be replaced with a fixed value inductor. In an embodiment, the switch control unit may be a switch chip with a switching function, and may also be a single-pole multi-throw switch or a single-pole single-throw switch.

In some embodiments, referring to fig. 3, fig. 3 is a schematic diagram of the antenna assembly 100 shown in fig. 1 in another embodiment. The isolation circuit 17 may include a first capacitor C1 having one end connected to the isolation point 16, a second capacitor C2 having one end connected to the other end of the first capacitor C1 and the other end grounded, and a first inductor L1 having one end connected to the other end of the first capacitor C1 and the other end grounded.

In some embodiments, the capacitance of the first capacitor C1 may be 7.3pF.

In some embodiments, the capacitance of the second capacitor C2 may be 4.6pF.

In some embodiments, the inductance of the first inductor L1 may be 2.4nH.

Referring to fig. 4, fig. 4 is a schematic diagram of the antenna element 100 shown in fig. 1 in another embodiment. The first frequency band may be a portion or all of a WiFi frequency band. The first excitation signal may be used to excite the first radiator 10 to generate a first resonant mode L1 supporting the first frequency band. The first resonant mode L1 is a 1/4 wavelength mode from the second free end 12 to the isolation point 16. The isolation circuit 17 may be configured to have a low impedance state in the first resonant mode L1 so as to improve isolation between the first radiator 10 and the second radiator 20 in the first resonant mode L1.

In an embodiment, the isolation circuit 17 may be configured to be in a short circuit state in the first resonance mode L1.

In one embodiment, the first frequency band may include a wifi2.4g frequency band.

In one embodiment, the first excitation signal may be used to excite the first radiator 10 to generate the second resonant mode L2 supporting the GPS band. The second resonant mode L2 is a 1/4 wavelength mode from the second free end 12 to the first free end 11. In some embodiments, the isolation between the first radiator 10 and the second radiator 20 in the second resonant mode L2 is required for the antenna assembly 100, and the isolation circuit 17 may be configured to have a high impedance state in the second resonant mode L2.

In one embodiment, the isolation circuit 17 may be configured to be open circuit in the GPS frequency band.

In an embodiment, the first excitation signal may be used to excite the first radiator 10 to generate a third resonant mode L3 supporting the second frequency band in the WiFi frequency band. The third resonant mode L3 is a 3/4 wavelength mode from the second free end 12 to the first free end 11. In some embodiments, the isolation between the first radiator 10 and the second radiator 20 in the third resonant mode L3 meets the requirement of the antenna assembly 100, and the isolation circuit 17 can be configured to have a high impedance state in the third resonant mode L3. It will be appreciated that the second frequency band is different from the first frequency band.

In one embodiment, the second frequency band may include a WiFi5G frequency band.

In an embodiment, the isolation circuit 17 may be configured to be in an open state in the third resonant mode L3.

In an embodiment, the first excitation signal may be used to excite the first radiator 10 to generate a fourth resonant mode L4 supporting a third frequency band in the WiFi frequency band. The fourth resonant mode L4 is a 1/4 wavelength mode from the second free end 12 to the first feeding point 13.

In one embodiment, the third frequency band may include a WiFi5G frequency band.

Referring to fig. 1, 2, 3 and 4, the second radiator 20 has a third free end 21 close to one side of the first radiator 10 and a fourth free end 22 far from one side of the first radiator 10. That is, the third free end 21 and the fourth free end 22 can be opposite ends of the second radiator 20,

the second radiator 20 is spaced apart from the first radiator 10 at a third free end 21.

The third free end 21 is spaced apart from the first radiator 10. I.e. a gap is provided between the third free end 21 and the first radiator 10, e.g. the first free end 11.

The fourth free end 22 may be grounded, and further the fourth free end 22 may also be referred to as "ground". In some embodiments, the fourth free end 22 may not be grounded. In some embodiments, the second radiator 20 may be grounded at a position other than the fourth free end 22.

The fourth free end 22 is located at a side of the third free end 21 away from the first radiator 10.

The second radiator 20 has a second feeding point 23 located between the third free end 21 and the fourth free end 22 to receive a second excitation signal, so that the second excitation signal excites the second radiator 20.

In some embodiments, the second feeding point 23 may be connected to a second matching circuit 24, and the second matching circuit 24 may be connected to a second feed 25. It will be appreciated that the second matching circuit 24 and the second feed 25 may also be part of the antenna assembly 100.

The second matching circuit 24 may support mid-high frequency bands and/or NR frequency bands of the antenna assembly 100. The second matching circuit 24 may comprise a switch control unit and/or a load circuit, or a tunable capacitor and/or a tunable inductor, or a tunable capacitor and/or a switch control unit. In an embodiment, the switch control unit may be a switch chip with a switching function, and may also be a single-pole multi-throw switch or a single-pole single-throw switch. In some embodiments, the second matching circuit 24 may be omitted and the second feed point 23 may be connected to a second feed 25.

The second feed 25 may be used to generate a second excitation signal to excite the second radiator 20 to generate resonant modes supporting the mid-high and/or NR frequency bands. The second driving signal may flow to the second radiator 20 through the second matching circuit 24.

In one embodiment, the second excitation signal excites the second radiator 20 to generate a fifth resonant mode supporting a fourth frequency band in the middle and high frequency bands.

Referring to fig. 4, in the antenna assembly 100, the isolation circuit 17 may be configured to adjust the isolation between the first radiator 10 in the first resonant mode L1 and the second radiator 20 in the fifth resonant mode.

In some embodiments, the fourth frequency band includes LTE (Long Term Evolution) B40 and/or LTE B41 frequency bands. It can be understood that when the first frequency band includes a wifi2.4g frequency band, the LTE B40 or LTE B41 frequency band of the fourth frequency band is relatively adjacent to the wifi2.4g frequency band, and then the isolation between the first radiator 10 in the first resonant mode L1 and the second radiator 20 in the fifth resonant mode needs to be adjusted by the isolation circuit 17, so as to improve the antenna performance of the antenna assembly 100.

Referring to fig. 5, fig. 5 is a graph illustrating an embodiment of return loss of the antenna element 100 of fig. 1 compared to the return loss of the antenna element 100 of fig. 2. The horizontal axis is frequency (GHz), the vertical axis is return loss (dB), curve B1 is the return loss curve of the antenna assembly 100 in fig. 1, and curve C1 is the return loss curve of the antenna assembly 100 in fig. 2. When the first radiator 10 operates in the wifi2.4g frequency band and the second radiator 20 operates in the LTE B40 frequency band, the curve C1 has a point a (2.3963, -8.9101) and the curve B1 has a point B (2.4083, -10.611), where-8.9101 dB- (-10.611 dB) =1.7009dB. It can be seen that the isolation point 16 and the isolation circuit 17 are arranged such that the isolation between the first radiator 10 and the second radiator 20 is virtually increased, which can substantially increase the isolation between the first radiator 10 and the second radiator 20 to 1.7dB.

Referring to fig. 6, fig. 6 is a graph illustrating return loss comparison between the antenna element 100 of fig. 1 and the antenna element 100 of fig. 2 according to an embodiment. The horizontal axis is frequency (GHz), the vertical axis is return loss (dB), curve B2 is the return loss curve of the antenna assembly 100 in fig. 1, and curve C2 is the return loss curve of the antenna assembly 100 in fig. 2. When the first radiator 10 operates in the wifi2.4g frequency band and the second radiator 20 operates in the LTE B41 frequency band, the curve C2 has a point C (2.4764, -8.9713) and the curve B2 has a point B (2.5207, -9.9329), where-8.9713 dB- (-9.9329 dB) =0.9616dB. It can be seen that the isolation point 16 and the isolation circuit 17 are arranged such that the isolation between the first radiator 10 and the second radiator 20 is virtually increased, which can substantially increase the isolation between the first radiator 10 and the second radiator 20 to 1dB.

Referring to fig. 7, fig. 7 is a graph illustrating a return loss curve of the first radiator 10 in fig. 1 in the first resonant mode L1 according to an embodiment. The horizontal axis represents frequency (GHz), the vertical axis represents return loss (dB), and the curve B3 represents a return loss curve of the first radiator 10 in fig. 1 in the first resonant mode L1. The curve B3 has a point e (1.5469, -0.77979) corresponding to the GPS band, and the curve B3 has a point f (2.895, -19.165) corresponding to the WiFi band. From the fact that the return loss at the point e approaches 0, it can be seen that the isolation circuit 17 is configured in a high impedance state in the GPS frequency band. From the return loss at point f being-19.165 dB, it can be seen that the isolation circuit 17 is configured in a low impedance state in the WiFi band.

Referring to fig. 8, fig. 8 is a graph illustrating a comparison of the Total System Efficiency (System Total Efficiency = System Radiation Efficiency) -return loss of the antenna assembly 100 of fig. 1 and the antenna assembly 100 of fig. 2 according to an embodiment. The horizontal axis is frequency (GHz), the vertical axis is total system efficiency (dB), curve B4 is total system efficiency of the second radiator 20 in fig. 1, curve C3 is total system efficiency of the second radiator 20 in fig. 2, curve B5 is total system efficiency of the first radiator 10 in fig. 1, and curve C4 is total system efficiency of the first radiator 10 in fig. 2. In the curves B4 and C3, it can be seen that the system radiation efficiency and bandwidth of the second radiator 20 on the LTE B40 frequency band are both significantly improved. In the curves B5 and C4, it can be seen that the system radiation efficiency and bandwidth of the first radiator 10 are both significantly improved in the GPS frequency band and the WiFi frequency band.

Referring to fig. 9, fig. 9 is a schematic diagram of the antenna element 100 shown in fig. 1 in another embodiment. In order to detect the Body Specific absorption Rate (Body sar) of the antenna assembly 100, the antenna assembly 100 may include a Body electromagnetic wave absorption detection circuit 30 connected to the isolation point 16, so that the first radiator 10 is used as a Body electromagnetic wave absorption detection sensor, and the Body electromagnetic wave absorption detection circuit 30 cooperates with the first radiator 10 to detect the Body electromagnetic wave absorption Rate of the antenna assembly 100. In some embodiments, the human body electromagnetic wave absorption detection circuit 30 may include a second inductor L2 having one end connected to the isolation point 16 and a control circuit 31 connected to the other end of the second inductor L2. The control circuit 31 may receive a signal generated by the antenna assembly 100 affected by a human body, and may process the signal to generate a detection result. In some embodiments, the control circuit 31 may be a control circuit on an electronic device, such as a circuit board. In some embodiments, the control circuit 31 may control at least one of the first feed 15, the first matching circuit 14, and the isolation circuit 17 according to the detection result to adjust the resonant mode of the first radiator 10 supporting the GPS frequency band and/or the WiFi frequency band. In some embodiments, the second inductor L2 may reduce the influence of the human body electromagnetic wave absorption detection circuit 30 and the GPS frequency band and/or the WiFi frequency band of the first radiator 10. In some embodiments, the inductance of the second inductor L2 may be 68nH.

In some embodiments, in order to reduce the influence of the first feed 15, the first matching circuit 14, the isolation circuit 17 and the ground on the accuracy of the detection result of the human body electromagnetic wave absorption rate of the antenna assembly 100, the antenna assembly 100 may further include a third capacitor C3 connected to the first feeding point 13, a fourth capacitor C4 disposed between the isolation point 16 and the isolation circuit 17, and a fifth capacitor C5 having one end connected to the first free end 11 and the other end grounded.

The third capacitor C3 is disposed between the first feeding point 13 and the first matching circuit 14, that is, the first feeding point 13, the third capacitor C3, the first matching circuit 14 and the first feed 15 are connected in series in sequence. And then the isolation of the human body electromagnetic wave absorption detection sensor is realized through the third capacitor C3. In some embodiments, when the first matching circuit 14 is omitted, the first feeding point 13, the third capacitor C3 and the first feed 15 are connected in series in sequence.

The fourth capacitor C4 is disposed between the isolation point 16 and the isolation circuit 17, that is, the isolation point 16, the fourth capacitor C4 and the isolation circuit 17 are connected in series. And further, the isolation of the human body electromagnetic wave absorption detection sensor is realized through a fourth capacitor C4. In some embodiments, the isolation circuit 17 has a capacitance, such as the first capacitance C1, directly connected to the isolation point 16, and the fourth capacitance C4 may be omitted. It will be appreciated that in some embodiments the fourth capacitance C4 may be retained, while the capacitance in the isolation circuit 17, e.g. the first capacitance C1, is omitted.

The fifth capacitor C5 is disposed between the first free end 11 and the ground, that is, the first free end 11, the fifth capacitor C5 and the ground are sequentially connected in series. And further, the isolation of the human body electromagnetic wave absorption detection sensor is realized through a fifth capacitor C5. In some embodiments, the capacitance of the fifth capacitor C5 may be 22pF or 33pF in order not to change the boundary conditions of the first radiator 10.

Next, an electronic device that can mount the antenna assembly 100 in the above-described embodiment will be explained. The electronic device may be any one of a number of electronic devices including, but not limited to, cellular phones, 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 controllers, pagers, netbook computers, 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 and combinations thereof.

In some embodiments, the electronic device may include, but is not limited to, an electronic device having a communication function, such as a mobile phone, an internet device (MID), an electronic book, a Portable Player Station (PSP), or a Personal Digital Assistant (PDA).

Referring to fig. 10 and 11, fig. 10 is an exploded view of an electronic device according to an embodiment of the present application, and fig. 11 is a rear view of the electronic device shown in fig. 10. The electronic device 200 may include a middle frame assembly 40 provided with the antenna assembly 100, a display screen 50 disposed at one side of the middle frame assembly 40 for displaying information, a battery cover 60 connected at the other side of the middle frame assembly 40, a circuit board 70 mounted on the middle frame assembly 40 for controlling the display screen 50 and the antenna assembly 100, and a battery 80 mounted on the middle frame assembly 40 for supplying power for normal operation of the electronic device 200.

The Display screen 50 may be a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display screen, and the like, for displaying information and pictures.

The material of the middle frame assembly 40 may be a metal such as magnesium alloy, aluminum alloy, stainless steel, etc., though the material is not limited thereto, and may be other materials such as an insulating material, for example, a hard material. The middle frame assembly 40 may be disposed between the display screen 50 and the battery cover 60. The center frame assembly 40 may be used to carry a display screen 50. The middle frame assembly 40 is snap-fit connected with the battery cover 60 to form an outer contour of the electronic device 200, and a receiving cavity is formed inside. The housing chamber may be used to house electronic components such as a camera, a circuit board 70, a battery 80, a processor (provided on the circuit board 70 and thus may be a part of the circuit board 70 in some embodiments), an antenna assembly 100, and various types of sensors in the electronic apparatus 200.

The circuit board 70 is mounted in the receiving cavity, and may be mounted at any position in the receiving cavity. The circuit board 70 may be a board of the electronic device 200. The processor of the electronic device 200 may be disposed on the circuit board 70. One, two or more 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 also be integrated on the circuit board 70. Meanwhile, the display screen 50 may be electrically connected to the circuit main board 70.

The battery 80 is mounted in the receiving cavity and can be mounted at any position in the receiving cavity. The battery 80 may be electrically connected to the circuit board 70 to supply power to the electronic device 200 by the battery 80. The circuit board 70 may be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 80 to various electronic components in the electronic device 200, such as the display screen 50.

The battery cover 60 may be made of the same material as the center frame assembly 40, although other materials may be used. The battery cover 60 may be integrally formed with the center frame assembly 40. In some embodiments, battery cover 60 may wrap around center frame assembly 40 and may carry display screen 50. The battery cover 60 may have a post-camera hole, a fingerprint recognition module mounting hole, and the like.

It will be understood that when an element is referred to as being "secured 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. 10 and 12, fig. 12 is a schematic structural diagram of the frame assembly 40 in the embodiment shown in fig. 10. The middle frame assembly 40 may include a substrate 41 for carrying the display screen 50 and a bezel 42 surrounding the substrate 41. The substrate 41 is disposed opposite to the battery cover 60. The frame 42 may be adapted to snap fit with the battery cover 60. That is, the substrate 41, the frame 42, and the battery cover 60 surround to form an accommodation chamber.

The substrate 41 may be a conductive metal, but may be other materials. The substrate 41 may be provided with a ground plane and a feed source. The ground plane serves as ground. In some embodiments, the ground plane and the feed source may not be disposed on the substrate 41, but directly disposed on the circuit board 70. In some embodiments, substrate 41 may be omitted.

The bezel 42 may be a conductive metal, so the bezel 42 may also be referred to as a "metal bezel". Of course, the frame 42 may be made of other materials, such as an insulating material. The frame 42 may be made of the same material as the substrate 41. The frame 42 may include a first frame 421, a second frame 422, a third frame 423, and a fourth frame 424 connected end to end in sequence. The first frame 421, the second frame 422, the third frame 423, and the fourth frame 424 surround the substrate 41 and can be connected and fixed with the substrate 41. In some embodiments, the bezel 42 may be a unitary structure with the battery cover 60. For example, the frame 42 extends from the edge of the battery cover 60 to the side of the display screen 50 to be connected with the display screen 50 in a snap-fit manner.

In some embodiments, the first frame 421, the second frame 422, the third frame 423, and the fourth frame 424 form a rounded rectangle. Of course, other shapes are possible such as circular, triangular, etc. In some embodiments, the first frame 421 is disposed opposite to the third frame 423, and the second frame 422 is disposed opposite to the fourth frame 424.

In some embodiments, the length of both the first frame 421 and the third frame 423 are shorter than the length of the second frame 422 and shorter than the length of the fourth frame 42.

It will be appreciated that the center frame assembly 40 and the battery cover 60 may constitute a main housing. In some embodiments, the main housing may not be limited to the middle frame assembly 40 and the battery cover 60, but may include other components, which are not described in detail.

Please refer to fig. 12. The antenna assembly 100 may be mounted on the center frame assembly 40. In some embodiments, the antenna assembly 100 may be part of the center frame assembly 40. Of course, in some embodiments, the antenna assembly 100 may also be mounted in other locations on the main housing, such as on the battery cover 60. In some embodiments, the antenna assembly 100 may be machined from the main housing. The antenna assembly 100 appears as a slot antenna, for example. In some embodiments, the antenna assembly 100 may be secured directly to the main housing.

The first radiator 10 is disposed on the frame 42, for example, the first frame 421, and the second radiator 20 is disposed on the first frame 421, and may be located on a side of the first radiator 10 away from the fourth frame 424. In some embodiments, the second radiator 20 may extend toward one side of the second frame 422 and may extend along the length direction of the second frame 422 to be partially disposed on the second frame 422.

In one embodiment, the first feed 15 and the second feed 25 may be feeds on the substrate 41 or the circuit board 70.

In one embodiment, the ground may be a ground plane on the substrate 41 or the circuit board 70.

Referring to fig. 13, fig. 13 is a schematic structural diagram of the frame assembly 40 of the embodiment shown in fig. 10 in another embodiment. A gap 43 is provided between the first frame 421 and the substrate 41. The slit 43 may extend toward the second bezel 422 in the extending direction of the first bezel 421. The gap 43 may be extended in an extending direction of the second rim 422 to be formed between the second rim 422 and the substrate 41.

The first frame 421 is provided with a slot 4211 and a slot 4212 communicating with the slot 43 to form the first radiator 10 of the antenna assembly 100 between the slot 4211 and the slot 4212.

The second frame 422 is provided with a slot 4221 communicating with the slot 43, so that the frame 42 forms the second radiator 20 of the antenna assembly 100 between the slot 4212 and the slot 4221.

In the present application, the first radiator 10 utilizes the first frame 421, and the second radiator 20 utilizes the connection portion of the first frame 421 and the second frame 422 on the first frame 421, so that the performance loss of the human hand to the antenna assembly 100 can be effectively improved.

It is understood that the connection strength between the substrate 41 and the bezel 42 is secured. An insulating material, such as resin, may be filled between the slot 43, the slot 4211, the slot 4212 and the slot 4221, so as to realize that the first radiator 10 and the second radiator 20 in the antenna assembly 100 are part of the frame 42, and further improve the appearance of the electronic device 200.

Referring to fig. 10 and 11 again, the battery cover 60 is disposed on one side of the middle frame assembly 40, and is respectively connected to the frames 42, such as the first frame 421, the second frame 422, the third frame 423, and the fourth frame 424, and disposed opposite to the substrate 41.

In some embodiments, the battery cover 60 is provided with the camera metal decorating part 61, the camera metal decorating part 61 is located at a position where the battery cover 60 is connected to the first frame 421, and an orthographic projection of the first frame 421 is located on a side of the first radiator 10 away from the second radiator 20. Thereby reducing the influence of the camera metal garnish 61 on the antenna performance of the first radiator 10.

Referring to fig. 14, fig. 14 is a schematic structural diagram of an electronic device 300 according to an embodiment of the present disclosure. The electronic device 300 may be a mobile phone, a tablet computer, a notebook computer, a wearable device, and the like. The present embodiment illustrates a mobile phone as an example. The structure of the electronic device 300 may include an RF circuit 310 (such as the antenna assembly 100 in the above-described embodiment), a memory 320, an input unit 330, a display unit 340 (such as the display screen 50 in the above-described embodiment), a sensor 350, an audio circuit 360, a WiFi module 370, a processor 380, a power supply 390 (such as the battery 80 in the above-described embodiment), and the like. 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, the RF circuit 310 is used for transmitting and receiving signals. The 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 approach signal, a distance signal, etc. The speaker 3601 and the microphone (or microphone or receiver set) 3602 are connected to the processor 380 through the audio circuit 360, and are used for receiving and transmitting sound signals. The WiFi module 370 is used for receiving and transmitting 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 apparatus embodiments are merely illustrative, and for example, a division of modules or units is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.

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

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The above description is only an example of the present application, and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes performed by the present application and the contents of the attached drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. An antenna assembly, comprising:

2. The antenna assembly of claim 1, wherein the isolation circuit is configured to be shorted at an operating frequency band of the first excitation signal.

3. An antenna assembly according to claim 1 or claim 2, wherein the first free end is connected to ground via a ground member, the isolation circuit being arranged to form, in the low impedance state, an equivalent ground path for the first excitation signal with the ground member.

4. The antenna assembly of claim 3, wherein a width of the equivalent ground path is greater than a width of the ground in a direction parallel to the first radiator.

5. The antenna assembly of claim 1, 2 or 4, wherein the first excitation signal is configured to excite the first radiator to generate a first resonant mode supporting a first frequency band of a WiFi frequency band, and wherein the first resonant mode is a 1/4 wavelength mode from the second free end to the isolation point.

6. The antenna assembly of claim 5, wherein the first excitation signal is configured to excite the first radiator to generate a second resonant mode supporting a GPS frequency band, the second resonant mode being a 1/4 wavelength mode from the second free end to the first free end, and wherein the isolation circuit is configured to exhibit a high impedance in the second resonant mode.

7. The antenna assembly of claim 6, wherein the isolation circuit is configured to be open circuit in the GPS frequency band.

8. The antenna assembly of claim 5, wherein the first excitation signal is configured to excite the first radiator to generate a third resonant mode supporting a second frequency band of the WiFi band, the third resonant mode being a 3/4 wavelength mode from the second free end to the first free end, and wherein the isolation circuit is configured to exhibit a high impedance in the third resonant mode, the second frequency band being different from the first frequency band.

9. The antenna assembly of claim 8, wherein the second frequency band comprises a WiFi5G frequency band.

10. The antenna assembly of claim 8 or 9, wherein the isolation circuit is configured to be in an open circuit state in the third resonant mode.

11. The antenna assembly of claim 5, wherein the first excitation signal is configured to excite the first radiator to generate a fourth resonant mode supporting a third frequency band of the WiFi band, and wherein the fourth resonant mode is a 1/4 wavelength mode from the second free end to the first feeding point.

12. The antenna assembly of claim 11, wherein the third frequency band comprises a WiFi5G frequency band.

13. The antenna assembly of claim 5, wherein the first frequency band comprises a WiFi2.4G band.

14. The antenna assembly of claim 5, wherein the second excitation signal is configured to excite the second radiator to generate a resonant mode supporting a middle-high frequency band or excite the second radiator to generate a resonant mode supporting a middle-high frequency band and a new air interface (NR) band.

15. The antenna assembly of claim 13, wherein the second excitation signal is used to excite the second radiator to generate a fifth resonant mode supporting a fourth frequency band of the mid-high frequency band, and wherein the isolation circuitry is configured to adjust a degree of isolation between the first radiator in the first resonant mode and the second radiator in the fifth resonant mode.

16. The antenna assembly of claim 15, wherein the fourth frequency band comprises a Long Term Evolution (LTE) B40 and/or LTE B41 frequency band.

17. The antenna assembly of claim 1, 2 or 4, wherein the isolation circuit comprises:

a first capacitor, one end of which is connected with the isolation point;

one end of the second capacitor is connected with the other end of the first capacitor, and the other end of the second capacitor is grounded; and

and one end of the first inductor is connected with the other end of the first capacitor, and the other end of the first inductor is grounded.

18. The antenna assembly of claim 1, 2 or 4, further comprising:

the human body electromagnetic wave absorption detection circuit is connected with the isolation point;

a third capacitor connected to the first feeding point, so that the first feeding point receives the first excitation signal through the third capacitor;

the fourth capacitor is arranged between the isolation point and the isolation circuit, so that the isolation point is connected with the isolation circuit through the fourth capacitor; and

and one end of the fifth capacitor is connected with the first free end, and the other end of the fifth capacitor is grounded, so that the first free end is grounded through the fifth capacitor.

19. A center frame assembly, comprising:

a substrate;

the frame is connected with the substrate and surrounds the periphery of the substrate; and

the antenna assembly of any one of claims 1-18, the first radiator and the second radiator disposed on the bezel.

20. An electronic device, comprising:

the center, include:

a substrate;

the antenna assembly of any one of claims 1-18, the first radiator being disposed on the first rim, the second radiator being disposed on at least the first rim and on a side of the first radiator remote from the fourth rim;