CN116073108A

CN116073108A - Antenna assembly, middle frame assembly and electronic equipment

Info

Publication number: CN116073108A
Application number: CN202111272346.3A
Authority: CN
Inventors: 胡兴邦
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2023-05-05
Also published as: WO2023071521A1

Abstract

The application discloses an antenna assembly, a middle frame assembly and electronic equipment, and relates to the technical field of communication. The antenna assembly includes a first radiating branch, a second radiating branch, and a parasitic branch. The first radiation branch is provided with a feed point and a first grounding point, the feed point can be electrically connected with a feed source, the first grounding point can be grounded, the first radiation branch is provided with a connecting point, the first radiation branch is used for supporting resonance on a first resonance frequency, and the first resonance frequency is low frequency; the second radiation branch is electrically connected to the connection point, the second radiation branch is used for supporting resonance on a second resonance frequency, the first resonance frequency is smaller than the second resonance frequency, and an electromagnetic field of the first radiation branch at the first resonance frequency and an electromagnetic field of the second radiation branch at the second resonance frequency are overlapped in a far field vector so as to enhance the electromagnetic field intensity in at least part of the far field space, further improve the radiation performance of the antenna assembly and improve the antenna performance of the antenna assembly.

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

In the prior art, when two radiators are capacitively coupled to form an antenna assembly, the antenna assembly can support a low frequency band, and the antenna performance of the antenna assembly is insufficient under a limit clearance.

Disclosure of Invention

The technical problem to be solved in the present application is to provide an antenna assembly, including:

a first radiating branch provided with a first end and a second end, and a feeding point is arranged between the first end and the second end so as to be electrically connected with a feeding source, a first grounding point is arranged between the first end and the second end of the first radiating branch so as to be grounded, a connecting point is arranged between the second end and the first grounding point of the first radiating branch, and the first radiating branch is used for supporting resonance on a first resonance frequency;

the second radiation branch is electrically connected with the connection point so as to be electrically connected with the feed source through the feed point, the second radiation branch is used for supporting resonance at a second resonance frequency, the first resonance frequency is smaller than the second resonance frequency, and an electromagnetic field of the first radiation branch at the first resonance frequency and an electromagnetic field of the second radiation branch at the second resonance frequency are overlapped in a far field vector so as to enhance the electromagnetic field strength in a far field at least partial space; and

and the parasitic branch is arranged at the second end and is in capacitive coupling with the first radiation branch, the parasitic branch is grounded, the parasitic branch is used for supporting resonance at a third resonance frequency, and the second resonance frequency is smaller than the third resonance frequency.

In order to solve the technical problems, the adopted technical scheme is as follows: a midframe assembly comprising:

a substrate;

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

the antenna assembly as described above, wherein the first radiating stub, the second radiating stub, and the parasitic stub are disposed on the frame.

In order to solve the technical problems, the adopted technical scheme is as follows: an electronic device, comprising:

a display screen;

the main shell is used for installing the display screen; and

the antenna assembly as described above, wherein the first radiating stub, the second radiating stub, and the parasitic stub are disposed on the main housing.

By adopting the technical scheme, the beneficial effects that have are: the first radiation branch and the second radiation branch that the electricity is connected together have been set up to this application, and first resonant frequency is less than the second resonant frequency, and the electromagnetic field of first radiation branch at first resonant frequency and the electromagnetic field of second radiation branch at the second resonant frequency are at the far field vector stack to reinforcing is at the electromagnetic field intensity in the at least partial space of far field, and then improves antenna assembly's radiation performance, promotes antenna assembly's antenna performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the drawings needed in the description of the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can 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 an embodiment of the present disclosure;

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

FIG. 3 is a schematic diagram of an antenna assembly according to another embodiment of the embodiment shown in FIG. 1;

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

FIG. 5 is a schematic diagram showing the comparison of antenna performance of the antenna assembly in the embodiment shown in FIG. 1 and the two embodiments shown in FIG. 4;

FIG. 6 is a radiation pattern of a first radiation branch of the antenna assembly in one embodiment of the embodiment of FIG. 4;

FIG. 7 is a radiation pattern of an antenna branch formed by a first radiation branch and a second radiation branch of the antenna assembly of the embodiment shown in FIG. 1 in one embodiment;

FIG. 8 is an exploded view of an electronic device in one embodiment of the present application;

FIG. 9 is a front view of the electronic device of the embodiment of FIG. 8;

FIG. 10 is a schematic diagram of the frame assembly of the embodiment of FIG. 8;

fig. 11 is a schematic structural diagram of the middle frame assembly and the circuit board, antenna assembly in the embodiment shown in fig. 8.

Detailed Description

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

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

The application provides an antenna assembly. The antenna assembly can be applied to electronic equipment. The antenna assembly may be a low medium high frequency (LMHB) antenna. The antenna assembly can improve the antenna performance in 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.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an antenna assembly 100 according to an embodiment of the present application. The antenna assembly 100 may be a hybrid of one or more of a flexible circuit board (Flexible Printed Circuit, FPC) antenna, a laser direct structuring (Laser Direct Structuring, LDS) antenna, a printed direct structuring (Print Direct Structuring, PDS) antenna, a metal stub antenna. Of course, the antenna assembly 100 may be other types of antennas, which will not be described in detail. In some embodiments, the antenna assembly 100 may be a hybrid of one or more of a strip, sheet, rod, coating, film, etc., but is not limited to the forms listed herein.

The antenna assembly 100 may include a first radiating stub 10 for supporting a first resonant frequency, a second radiating stub 20 connected to the first radiating stub 10 for supporting a second resonant frequency, and a parasitic stub 30 capacitively coupled to the first radiating stub 10. Wherein the first radiating stub 10 is provided with a feed point 13 for electrical connection with a feed source 14. The second radiating stub 20 is connected to the feed point 13 of the first radiating stub 10. The parasitic branch 30 is spaced apart from the first radiating branch 10 to form a gap between the parasitic branch 30 and the first radiating branch 10, the first radiating branch 10 being capacitively coupled to the parasitic branch 30 through the gap. The "capacitive coupling" means that an electric field is generated between the first radiating branch 10 and the parasitic branch 30, and a signal of the first radiating branch 10 can be transmitted to the parasitic branch 30 through the electric field, and a signal of the parasitic branch 30 can be transmitted to the first radiating branch 10 through the electric field, so that the first radiating branch 10 and the parasitic branch 30 can also realize electric signal conduction in a disconnected state.

The first radiating branch 10 may support at least a Low Band (LB), for example, the first radiating branch 10 may support a Low-medium band (LMB). The second radiating branch 20 may support at least a mid-band (MB), for example, the second radiating branch 20 may support a low-mid band. The parasitic branch 30 may support High Band (HB) and Ultra High Band (UHB).

Wherein the first radiating branch 10 may support resonance at a first resonance frequency in the low frequency band, the second radiating branch 20 may support resonance at a second resonance frequency, and the parasitic branch 30 may support resonance at a third resonance frequency. The first resonant frequency is lower than the second resonant frequency, and both the first resonant frequency and the second resonant frequency are lower than the third resonant frequency. The electromagnetic field of the first radiation branch 10 at the first resonant frequency and the electromagnetic field of the second radiation branch 20 at the second resonant frequency are superimposed in a far field vector to enhance the electromagnetic field strength in at least part of the far field space, so that the radiation performance of the antenna assembly 100, for example, the first radiation branch 10 in a low frequency band can be improved, and further, the antenna performance of the antenna assembly 100 in the low frequency band can be improved, so that the antenna assembly 100 can enhance the communication performance of electronic equipment under the condition of extremely small headroom.

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

It will be appreciated that in one embodiment, the electromagnetic field of the first radiating stub 10 at the first resonant frequency and the electromagnetic field of the second radiating stub 20 at the second resonant frequency are superimposed at the far field vector to enhance the electromagnetic field strength in the far field portion space. In one embodiment, the electromagnetic field of the first radiating branch 10 at the first resonant frequency and the electromagnetic field of the second radiating branch 20 at the second resonant frequency are superimposed at a far field vector to enhance the electromagnetic field strength at the far field.

The names "first radiation branch", "second radiation branch", and "radiation branch" in the above-described embodiments may be mutually converted, for example, "first radiation branch" may be converted into "second radiation branch", and correspondingly, "second radiation branch" may be converted into "first radiation branch".

The names "first resonance frequency", "second resonance frequency", "third resonance frequency", and "resonance frequency" in the above-described embodiments may be mutually converted, for example, "first resonance frequency" may be converted into "second resonance frequency", and accordingly, "second resonance frequency" may be converted into "first resonance frequency".

The first radiating branch 10 may support a first predetermined frequency band including a first resonant frequency. The first radiation branch 10 is provided with a first end 11 and a second end 12. The first radiating stub 10 is spaced apart from the parasitic stub 30 at the second end 12 to capacitively couple with the parasitic stub 30. In one embodiment, the first end 11 is the end of the first radiating branch 10 remote from the parasitic branch 30.

The first radiating stub 10 may provide a feeding point 13 between the first end 11 and the second end 12 to be electrically connected with a feeding source 14.

The first radiating branch 10 is provided with a first grounding point 15 between the first end 11 and the feed point 13, the first grounding point 15 being electrically connected to a first tuning control circuit 16, the first tuning control circuit 16 being grounded. In one embodiment, the first tuning control circuit 16 may be omitted and the first ground point 15 is directly grounded.

In some embodiments, the first tuning control circuit 16 is primarily for implementing the requirement of supporting a plurality of first preset frequency bands, and thus, the first tuning control circuit 16 may include a switch control circuit and/or a load circuit, or may include a capacitance (e.g., a fixed value capacitor and/or a tunable capacitor) and/or an inductance (e.g., a fixed value inductor and/or a tunable 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.

The first radiating branch 10 is provided with a connection point 17 between the feeding point 13 and the first ground point 15 to be electrically connected with the second radiating branch 20.

In one embodiment, the first radiating stub 10 resonates at the first resonant frequency by a length of 5/4 of the wavelength corresponding to the first resonant frequency.

The second radiating stub 20 may support a second predetermined frequency band including a second resonant frequency. The second radiating stub 20 is provided with a third end 21 and a fourth end 22. The second radiating stub 20 may be electrically connected to the connection point 17 of the first radiating stub 10 at a third end 21. In one embodiment, the fourth end 22 is an end of the second radiating stub 20 remote from the parasitic stub 30.

It will be appreciated that in some embodiments, the first radiating branch 10 may be part of the second radiating branch 20 at the location of the second end 12 to the connection point 17, and the first radiating branch 10 is electrically connected to the second radiating branch 20 at the location of the first end 11 to the connection point 17.

In some embodiments, the second radiating stub 20 resonates at the second resonant frequency by a length of 1/4 of a wavelength corresponding to the second resonant frequency.

The parasitic branch 30 may support a third predetermined frequency band including a third resonant frequency. The parasitic branch 30 may be provided with a fifth end 31 and a sixth end 32. The parasitic branch 30 may be spaced from the second end 12 of the first radiating branch 10 at a fifth end 31 to capacitively couple with the first radiating branch 10. In one embodiment, sixth end 32 is the end of parasitic branch 30 remote from first radiating branch 10.

It will be appreciated that the names "first preset frequency band", "second preset frequency band", "third preset frequency band" and "preset frequency band" in the above embodiments may be mutually converted, for example, "first preset frequency band" may be converted into "second preset frequency band", and correspondingly, "second preset frequency band" may be converted into "first preset frequency band".

In addition, the names "first end", "second end", "third end", "fourth end", "fifth end", "sixth end" and "end" in the above-described embodiments may be mutually converted, for example, "first end" may be converted to "second end", and accordingly, "second end" may be converted to "first end".

The parasitic branch 30 is provided with a second grounding point 33 between the fifth end 31 and the sixth end 32 to be grounded.

In one embodiment, referring to fig. 2, fig. 2 is a schematic diagram of an antenna assembly 100 in another embodiment of the embodiment shown in fig. 1. The first radiation branch 10 may be bent under the requirement of space or electronic equipment in which the first radiation branch 10 is installed. Of course, the second radiating branch 20 and/or the parasitic branch 30 may also be bent, which is not described in detail.

In one embodiment, referring to fig. 3, fig. 3 is a schematic diagram illustrating an antenna assembly 100 according to another embodiment of the embodiment shown in fig. 1. The second radiating branch 20 is provided with a third grounding point 23 between the third end 21 and the fourth end 22, and the third grounding point 23 is electrically connected with the second tuning control circuit 24. In some embodiments, the second tuning control circuit 24 may be omitted and the third ground point 23 is directly grounded.

It will be appreciated that the designations "first ground point", "second ground point", "third ground point" and "ground point" in the above embodiments may be mutually switched, for example, "first ground point" may be switched to "second ground point" and, correspondingly, "second ground point" may be switched to "first ground point".

In one embodiment, the second tuning control circuit 24 is mainly for implementing the requirement of supporting a plurality of second preset frequency bands, and thus, the second tuning control circuit 24 may include a switch control circuit and/or a load circuit, or include a capacitor (e.g., a fixed capacitor and/or a tunable capacitor) and/or an inductor (e.g., a fixed inductor and/or a tunable inductor).

It will be appreciated that the names "first tuning control circuit", "second tuning control circuit", and "tuning control circuit" in the above embodiments may be mutually converted, for example, "first tuning control circuit" may be converted into "second tuning control circuit", and accordingly, "second tuning control circuit" may be converted into "first tuning control circuit".

Referring to fig. 4, fig. 4 is a schematic structural diagram of an antenna assembly 100 in another embodiment in the embodiment shown in fig. 1. Wherein the antenna assembly 100 in the embodiment shown in fig. 4 omits the second radiating stub 20.

The antenna assembly 100 in the embodiment shown in fig. 1 and the antenna assembly 100 in the embodiment shown in fig. 4 are subjected to corresponding performance detection by using simulation software. The antenna performance of the antenna assembly 100 in some embodiments may be referred to in fig. 5, and fig. 5 is a schematic diagram illustrating the antenna performance of the antenna assembly 100 in the embodiment shown in fig. 1 and the embodiment shown in fig. 4. The antenna performance of the antenna branch formed by the first radiating branch 10 and the second radiating branch 20 in the antenna assembly 100 in the embodiment shown in fig. 1 may be referred to as curves A1, A2, A3, etc. in fig. 5, and the antenna performance of the first radiating branch 10 in the antenna assembly 100 in the embodiment shown in fig. 4 may be referred to as curves B1, B2, B3, etc. in fig. 5.

A1 is a return loss curve of an antenna branch formed by the first radiation branch 10 and the second radiation branch 20 in the antenna assembly 100. B1 is the return loss curve of the first radiating stub 10 in the antenna assembly 100. A2 is a radiation efficiency (System Radiation Efficiency) curve of the antenna branch consisting of the first radiation branch 10 and the second radiation branch 20 in the antenna assembly 100. B2 is the radiation efficiency curve of the first radiating stub 10 in the antenna assembly 100. A3 is a graph of the total efficiency (System Total Efficiency, total efficiency = radiation efficiency-return loss) of the antenna branch consisting of the first radiation branch 10 and the second radiation branch 20 in the antenna assembly 100. B3 is a total efficiency (total efficiency = radiation efficiency-return loss) curve of the first radiation branch 10 in the antenna assembly 100.

Wherein, the return loss of the curve A1 corresponding to the first resonant frequency 0.89324GHz in the low frequency band is-5.2913146 dB. Curve B1 corresponds to a return loss of-5.9043064 dB for the first resonant frequency 0.89324GHz in the low band. It can be seen that the antenna assembly 100 of the embodiment shown in fig. 1 has an antenna performance improved by approximately 0.61dB due to the antenna branches consisting of the first radiating branch 10 and the second radiating branch 20.

Curve A2 corresponds to a radiation efficiency of-3.3192888 dB at the first resonant frequency 0.89324GHz in the low frequency band. Curve B2 corresponds to a radiation efficiency of-3.7398522 dB for the first resonant frequency 0.89324GHz in the low frequency band. It can be seen that the radiation efficiency of the antenna branch formed by the first radiation branch 10 and the second radiation branch 20 in the antenna assembly 100 in the embodiment shown in fig. 1 is improved by approximately 0.42dB.

Curve A3 corresponds to a total efficiency of-4.9141174 dB for the first resonant frequency 0.89324GHz in the low frequency band. Curve B3 corresponds to a total efficiency of-5.1983856 dB for the first resonant frequency 0.89324GHz in the low frequency band. It can be seen that the overall efficiency of the antenna assembly 100 of the embodiment shown in fig. 1, which is composed of the first radiating branch 10 and the second radiating branch 20, is improved by approximately 0.28dB.

As can be seen, when the resonance direction of the first radiating branch 10 at the first resonant frequency is the same as the resonance direction of the second radiating branch 20 at the second resonant frequency, the radiation performance of the antenna assembly 100, for example, the first radiating branch 10, in the low frequency band is improved, so that the antenna performance of the antenna assembly 100 in the low frequency band can be improved, and thus the communication performance of the electronic device can be enhanced under the condition of extremely small headroom of the antenna assembly 100.

In one embodiment, the first resonant frequency is 0.89GHz.

In one embodiment, the second resonant frequency is 1.12GHz.

In one embodiment, the length of the resonance of the first radiating stub 10 is 5/4 of the wavelength corresponding to the first resonance frequency.

In one embodiment, the second radiating stub 20 resonates by a length of 1/4 of the wavelength corresponding to the second resonant frequency.

Referring to fig. 6 and 7 together, fig. 6 is a radiation pattern of the first radiation branch 10 of the antenna assembly 100 in one embodiment shown in fig. 4, and fig. 7 is a radiation pattern of the antenna branch formed by the first radiation branch 10 and the second radiation branch 20 of the antenna assembly 100 in one embodiment shown in fig. 1. Wherein the first direction X 'is perpendicular to the second direction Z'. The resonant frequencies in fig. 6 and 7 are the same, the radiation efficiency in fig. 6 is less than the radiation efficiency in fig. 7, the overall efficiency in fig. 6 is less than the overall efficiency in fig. 7, the radiation pattern in fig. 6 is significantly current generation in the first direction X ', the radiation pattern in fig. 7 is significantly current generation in the second direction Z ', and fig. 7 is more capable of exciting current in the second direction Z ' relative to fig. 6, improving the performance of the antenna assembly 100.

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 having communication capabilities such as a cell phone, an internet device (mobile internet device, MID), an electronic book, a portable player station (Play Station Portable, PSP), or a personal digital assistant (Personal Digital Assistant, PDA).

Referring to fig. 8 and 9, fig. 8 is an exploded view of the electronic device according to an embodiment of the present application, and fig. 9 is a front view of the electronic device according to the embodiment shown in fig. 8. The electronic device 200 may include a display screen 40 for displaying information, a middle frame assembly 50 for mounting the display screen 40 on one side, a circuit board 60 mounted on the middle frame assembly 50, a battery 70 mounted on the middle frame assembly 50, and a rear cover 80 snap-fit connected to the other side of the middle frame assembly 50.

The display 40 may be a liquid crystal display (Liquid Crystal Display) or an Organic Light-Emitting Diode (OLED) for displaying information and images.

The material of the middle frame assembly 50 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 50 may be interposed between the display screen 40 and the rear cover 80. The middle frame assembly 50 may be used to carry the display screen 40. The middle frame assembly 50 is snap-coupled to the rear cover 80 to form an outer contour of the electronic device 200 and to form a receiving cavity therein. The receiving cavity may be used to receive cameras, circuit boards 60, batteries 70, processors, antenna assemblies 100, and various types of sensors, among other electronic components in electronic device 200. It is understood that the housing assembly may not be limited to the middle frame assembly 50 and the rear cover 80, but may also include other structures, which will not be described in detail.

The circuit board 60 is installed in the accommodating chamber and can be installed at any position in the accommodating chamber. The circuit motherboard 60 may be the motherboard of the electronic device 200. The processor of the electronic device 200 may be disposed on the circuit motherboard 60. One, two or more of the functional components of a motor, microphone, speaker, receiver, earphone interface, universal serial bus interface (USB interface), camera, distance sensor, ambient light sensor, gyroscope, etc. may also be integrated on the circuit board 60. Meanwhile, the display screen 40 may be electrically connected to the circuit board 60.

The battery 70 is installed in the accommodating chamber and may be installed at any position in the accommodating chamber. The battery 70 may be electrically connected to the circuit motherboard 60 to enable the battery 70 to power the electronic device 200. The circuit board 60 may have a power management circuit disposed thereon. The power management circuit is used to distribute the voltage provided by the battery 70 to various electronic components in the electronic device 200, such as the display 40.

The rear cover 80 may be made of the same material as the middle frame assembly 50, although other materials may be used. The rear cover 80 may be integrally formed with the center frame assembly 50. In some embodiments, the rear cover 80 may wrap around the bezel assembly 50 and may carry the display screen 40. Rear cover 80 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. 10, fig. 10 is a schematic structural diagram of a frame assembly 50 in the embodiment shown in fig. 8. The middle frame assembly 50 may include a substrate 51 for carrying the display 40 and a bezel 52 surrounding the substrate 51. Wherein the base plate 51 is disposed opposite to the rear cover 80. The bezel 52 may be adapted for snap-fit connection with the back cover 80. That is, the base plate 51, the frame 52, and the rear cover 80 define a housing chamber.

The substrate 51 may be a conductive metal, but may be other materials. The substrate 51 may be provided with a ground plane and a power supply. In some embodiments, the ground plane and the power feed may not be disposed on the substrate 51, but may be disposed directly on the circuit board 60. In some embodiments, the substrate 51 may be omitted.

The bezel 52 may be a conductive metal, so the bezel 52 may also be referred to as a "metal bezel". Of course, the frame 52 may be made of other materials, such as an insulating material. The frame 52 may be made of the same material as the substrate 51. The frame 52 may include a first frame 521, a second frame 522, a third frame 523, and a fourth frame 524 connected end to end in sequence. The first frame 521, the second frame 522, the third frame 523, and the fourth frame 524 are disposed around the substrate 51 and can be connected and fixed to the substrate 51. In some embodiments, bezel 52 may be of unitary construction with rear cover 80. For example, the frame 52 extends from the edge of the rear cover 80 to the display 40 to be fastened to the display 40.

It will be appreciated that the names "first frame", "second frame", "third frame", "fourth frame", and "frame" in the above embodiments may be mutually converted, for example, "first frame" may be converted into "second frame", and accordingly, "second frame" may be converted into "first frame".

In some embodiments, the first frame 521, the second frame 522, the third frame 523, and the fourth frame 524 enclose a rounded rectangle. Of course, other shapes such as circular, triangular, etc. are also possible. In some embodiments, the first frame 521 is disposed opposite the third frame 523, and the second frame 522 is disposed opposite the fourth frame 524.

It will be appreciated that the center assembly 50 and the rear cover 80 may comprise a main housing. In some embodiments, the main housing may not be limited to the middle frame assembly 50 and the rear cover 80, but may include other components, which will not be described in detail.

Referring to fig. 11, fig. 11 is a schematic diagram illustrating the cooperation between the middle frame assembly 50 and the circuit board 60, and between the antenna assembly 100 in the embodiment shown in fig. 8. The antenna assembly 100 may be mounted on the center frame assembly 50. In some embodiments, the antenna assembly 100 may be part of the middle frame assembly 50. Of course, in some embodiments, the antenna assembly 100 may also be mounted at other locations on the main housing, such as on the rear cover. In some embodiments, the antenna assembly 100 may be machined from a main housing. 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.

Referring to fig. 10 and 11 together, the first radiating branch 10 is disposed on a frame 52, such as a second frame 522, and the second radiating branch 20 is disposed on a third frame 523. The parasitic branch 30 is disposed on the frame 52, e.g., the first frame 521, the second frame 522. Of course, the first radiating branch 10, the second radiating branch 20 and the parasitic branch 30 may be further disposed on other frames of the frame 52 according to needs, which is not described herein.

The first radiating stub 10 may be disposed on a bezel 52, such as a second bezel 522. In some embodiments, the first radiating stub 10 may be disposed to extend to a side of the frame 52, e.g., the third frame 523, and may be disposed to extend over the frame 52, e.g., the third frame 523.

In some embodiments, first end 11 may be located opposite first radiating stub 10 from a bezel 52, such as third bezel 523. In some embodiments, first end 11 may be located opposite first radiating stub 10 from a bezel 52, such as second bezel 522.

In an embodiment, the second end 12 may be located opposite the first radiating stub 10 from a bezel 52, such as the second bezel 522.

In one embodiment, the feeding point 13 may be electrically connected to a feeding source on the substrate 51 or the circuit board 60. In an embodiment, the feeding point 13 may be located at a position of the first radiating stub 10 opposite to the frame 52, for example, the second frame 522. In an embodiment, the feeding point 13 may be located at a position of the first radiating stub 10 opposite to the frame 52, for example, the third frame 523.

In one embodiment, the first grounding point 15 may be electrically connected to a grounding plane on the substrate 51 or the circuit board 60. In some embodiments, the first ground point 15 may be located opposite the first radiating stub 10 from a bezel 52, such as the third bezel 523. In some embodiments, the first ground point 15 may be located opposite the first radiating stub 10 from a bezel 52, such as the second bezel 522.

In one embodiment, the first radiation branch 10 is fixed. The first radiation branch 10 is provided with a fixing part 18 extending to the substrate 51 or the circuit main board 60, and the fixing part 18 and the substrate 51 or the circuit main board 60 are fixed by using structures such as screws, bolts, glue and the like so as to avoid loosening and falling of the first radiation branch 10.

In an embodiment, the second radiating stub 20 may be disposed on a bezel 52, such as the second bezel 522. In some embodiments, the second radiating stub 20 may extend to a side of the bezel 52, such as the third bezel 523, and may extend over the bezel 52, such as the third bezel 523.

In an embodiment, the third end 21 may be located opposite the second radiating stub 20 from the bezel 52, such as the second bezel 522. In some embodiments, third end 21 may be located opposite second radiating stub 20 from a bezel 52, such as third bezel 523.

In one embodiment, fourth end 22 may be located opposite second radiating stub 20 from a bezel 52, such as second bezel 522. In some embodiments, fourth end 22 may be located opposite second radiating stub 20 from a bezel 52, such as third bezel 523.

In one embodiment, the second radiation stub 20 is fixed. The second radiation branch 20 is provided with a fixing portion 25 extending to the substrate 51 or the circuit board 60, and the fixing portion 25 and the substrate 51 or the circuit board 60 are fixed by using screws, bolts, glue and other structures to avoid loosening and falling of the second radiation branch 20.

In one embodiment, when the antenna assembly 100 is mounted on the middle frame assembly 50 in the embodiment shown in fig. 3, the third grounding point 23 may be electrically connected to the grounding plane on the substrate 51 or the circuit board 60 directly or through the second tuning control circuit 24. In some embodiments, third ground point 23 may be located at a position of second radiating stub 20 opposite border 52, such as third border 523. In some embodiments, third ground point 23 may be located at a position of second radiating stub 20 opposite bezel 52, such as second bezel 522.

In an embodiment, the parasitic dendrite 30 may be disposed on the frame 52, such as the second frame 522, and in some embodiments, the parasitic dendrite 30 may extend toward one side of the frame 52, such as the first frame 521, and may extend over the frame 52, such as the first frame 521.

In some embodiments, fifth end 31 may be located opposite parasitic branch 30 from bezel 52, such as first bezel 521. In some embodiments, fifth end 31 may be located opposite parasitic branch 30 from bezel 52, such as second bezel 522.

In one embodiment, sixth end 32 may be located opposite parasitic branch 30 from bezel 52, such as second bezel 522.

In an embodiment, the second grounding point 33 may be electrically connected to a grounding plane on the substrate 51 or the circuit board 60. In some embodiments, second ground point 33 may be located opposite parasitic branch 30 from bezel 52, such as second bezel 522. In some embodiments, the second ground point 33 may be located opposite the parasitic stub 30 from the bezel 52, such as the first bezel 521.

In one embodiment, to yield functional holes such as microphone holes, speaker holes, earphone interface mounting holes, universal Serial Bus (USB) interface mounting holes, etc. formed in the frame 52, the antenna assembly 100 such as the first radiating stub 10, the second radiating stub 20, and the parasitic stub 30 may be disposed on one side of the functional holes, i.e., bypass from one side of the functional holes, and form a crossing portion at the bypass portion. In some embodiments, the orthographic projection of the crossover onto the substrate 51 may be on the substrate 51, or the orthographic projection of the crossover onto the circuit board 60 may be on the circuit board 60.

It will be appreciated that the functional holes on the frame 52 may also be located wholly or partially on the portion of the frame 52 opposite the first radiating branch 10, such as the second frame 522 or the third frame 523, and the functional holes on the frame 52 may also be located wholly or partially on the portion of the frame 52 opposite the second radiating branch 20, such as the second frame 522 or the third frame 523. Accordingly, the first radiation branch 10 and/or the second radiation branch 20 may also be provided with a spanning portion. The function, structure of the spans in a particular first radiating branch 10 and/or second radiating branch 20 may be substantially the same in the spans in the parasitic branch 30. The function and structure of the spans in the first radiating branch 10 and/or the second radiating branch 20 may be referred to as spans in the parasitic branch 30.

In some embodiments, the sixth end 32 of the parasitic stub 30 may be located on the span. In an embodiment, the second end 12 of the first radiating stub 10 may also be located on the span. Accordingly, ground points, feed points, ends, and the like in the antenna assembly 100 may also be located on the crossover.

See fig. 7 and 11 together. The first direction X 'may be consistent with an extending direction of the frame 52, for example, the second frame 522, and the second direction Z' may be consistent with an extending direction of the frame 52, for example, the first frame 521. In the electronic device 200, the current in the second direction Z' may enhance the antenna performance of the antenna assembly 100 in the electronic device 200.

The foregoing description is only exemplary embodiments of the present application and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application, 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:

the second radiation branch is electrically connected with the connection point so as to be electrically connected with the feed source through the feed point, the second radiation branch is used for supporting resonance at a second resonance frequency, the first resonance frequency is smaller than the second resonance frequency, and an electromagnetic field of the first radiation branch at the first resonance frequency and an electromagnetic field of the second radiation branch at the second resonance frequency are overlapped in a far field vector so as to enhance the electromagnetic field strength in at least part of a far field space; and

2. The antenna assembly of claim 1, wherein the first radiating stub resonates at the first resonant frequency by a length of 5/4 of a wavelength corresponding to the first resonant frequency.

3. An antenna assembly according to claim 1 or 2, wherein the first resonant frequency is a low frequency.

4. The antenna assembly of claim 3, wherein the first resonant frequency is 0.89GHz.

5. An antenna assembly according to claim 1 or 2, characterized in that the length of the second radiating stub resonating at the second resonance frequency is 1/4 of the wavelength corresponding to the second resonance frequency.

6. The antenna assembly of claim 5, wherein the second resonant frequency is 1.12GHz.

7. An antenna assembly according to claim 1 or 2, characterized in that the third resonance frequency is high frequency and/or ultra high frequency.

8. The antenna assembly of claim 1, wherein the first ground point is electrically connected to a first tuning control circuit, the first tuning control circuit being coupled to ground, the first tuning control circuit being configured to cause the first radiating stub to support a plurality of first preset frequency bands, the plurality of first preset frequency bands including the first resonant frequency.

9. The antenna assembly of claim 8, wherein the first tuning control circuit comprises a capacitance and/or an inductance.

10. The antenna assembly according to any of claims 1-2, 4, 6, 8-9, wherein the second radiating branch is provided with a second ground point, the second ground point being electrically connected to a second tuning control circuit, the second tuning control circuit being grounded, the second tuning control circuit being configured to cause the second radiating branch to support a plurality of second preset frequency bands, the plurality of second preset frequency bands comprising the second resonant frequency.

11. A center assembly, comprising:

a substrate;

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

the antenna assembly of any of claims 1-10, the first radiating stub, the second radiating stub, and the parasitic stub being disposed on the bezel.

12. An electronic device, comprising:

a display screen;

the main shell is used for installing the display screen; and

the antenna assembly of any of claims 1-10, the first radiating stub, the second radiating stub, and the parasitic stub being disposed on the main housing.