CN210805993U

CN210805993U - Antenna radiator and electronic device

Info

Publication number: CN210805993U
Application number: CN201921896214.6U
Authority: CN
Inventors: 彭致勇; 向元彬
Original assignee: Realme Chongqing Mobile Communications Co Ltd
Current assignee: Realme Chongqing Mobile Communications Co Ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-06-19
Anticipated expiration: 2029-11-05

Abstract

The embodiment of the application provides an antenna radiator and electronic equipment, the antenna radiator includes first radiating part, second radiating part and third radiating part that connects in order, the third radiating part with second radiating part forms an annular structure to be formed with the clearance between the two. The first radiation part is used for radiating radio-frequency signals of a first frequency band, the second radiation part and the third radiation part realize electromagnetic coupling through a gap and are used for radiating radio-frequency signals of a second frequency band, and an annular structure formed by the second radiation part and the third radiation part is used for radiating radio-frequency signals of a third frequency band. According to the antenna radiator and the electronic equipment, the transmission of radio-frequency signals of three frequency bands can be simultaneously realized by feeding on the antenna radiator with a small area, the overall size of the antenna radiator is small, the occupied space inside the electronic equipment is small, and the installation difficulty of the antenna radiator can be reduced.

Description

Antenna radiator and electronic device

Technical Field

The present application relates to the field of antenna technologies, and in particular, to an antenna radiator and an electronic device.

Background

With The rapid development of communication Technology, The 4th Generation mobile communication Technology (4G) has gradually become difficult to meet The user's requirements, especially The user's requirements for higher network speed and lower network delay. With this, The fifth Generation mobile communication Technology (5G) is gradually emerging.

According to the 5G communication protocol standard, the 5G communication band is considered to be defined and divided, including N41(2515 + 2675MHz) band, N78(3400 + 3600MHz) band and N79(4800 + 4900MHz) band. Different frequency bands correspond to different purposes and functions, and therefore, how to design an antenna system with multiple broadband to meet different communication requirements in a limited space becomes a problem to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an antenna radiator and electronic equipment, which can simultaneously realize the transmission of radio frequency signals of three frequency bands.

The antenna radiator that this application embodiment provided, including first ground point, feed point and second ground point, the antenna radiator passes through the feed point realizes the feed, the antenna radiator passes through first ground point with the ground connection is realized to the second ground point, the antenna radiator still includes:

a first radiation section;

the second radiation part comprises a first end and a second end which are oppositely arranged, and the first end is connected with the first radiation part; and

a third radiating part, which includes a third end and a fourth end that are oppositely arranged, the third end is connected with the second end, the fourth end extends towards the first end, so that the third radiating part and the second radiating part form a ring structure, and a gap is formed between the third radiating part and the second radiating part;

the first radiation part is used for radiating radio-frequency signals of a first frequency band, the second radiation part and the third radiation part realize electromagnetic coupling through the gap and are used for radiating radio-frequency signals of a second frequency band, and the annular structure formed by the second radiation part and the third radiation part is used for radiating radio-frequency signals of a third frequency band.

The electronic equipment that this application embodiment provided includes:

an antenna radiator including the antenna radiator; and

the circuit board is provided with a first grounding end, a feeding end and a second grounding end, the first grounding end is connected with the first grounding point, the feeding end is connected with the feeding point, and the second grounding end is connected with the second grounding point.

According to the antenna radiator and the electronic device provided by the embodiment of the application, the antenna radiator comprises the first radiating part, the second radiating part and the third radiating part which are sequentially connected, the third radiating part and the second radiating part form an annular structure, and a gap is formed between the third radiating part and the second radiating part. The first radiation part is used for radiating radio-frequency signals of a first frequency band, the second radiation part and the third radiation part realize electromagnetic coupling through a gap and are used for radiating radio-frequency signals of a second frequency band, and an annular structure formed by the second radiation part and the third radiation part is used for radiating radio-frequency signals of a third frequency band. Furthermore, according to the antenna radiator and the electronic device of the embodiment of the application, the transmission of radio frequency signals of three frequency bands can be simultaneously realized by feeding on the antenna radiator with a small area, the overall size of the antenna radiator is small, the occupied space in the electronic device is small, and the installation difficulty of the antenna radiator can be reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

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

Fig. 2 is a schematic view of a first structure of an antenna radiator according to an embodiment of the present application.

Fig. 3 is a schematic view of a second structure of an antenna radiator according to an embodiment of the present application.

Fig. 4 is a schematic view of a third structure of an antenna radiator according to an embodiment of the present application.

Fig. 5 is a schematic diagram of a fourth structure of an antenna radiator according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a second electronic device according to an embodiment of the present application.

Fig. 7 is a diagram of S11 parameters of an antenna radiator according to an embodiment of the present disclosure.

Fig. 8 is a current distribution diagram of an antenna radiator at 3500MHZ according to an embodiment of the present invention.

Fig. 9 is a current distribution diagram of an antenna radiator at 2620MHZ according to an embodiment of the present invention.

Fig. 10 is a current distribution diagram of an antenna radiator at 4940MHZ according to an embodiment of the present application.

Fig. 11 is a schematic view of a fifth structure of an antenna radiator according to an embodiment of the present application.

Fig. 12 is a schematic view of a sixth structure of an antenna radiator according to an embodiment of the present application.

Fig. 13 is a partial equivalent circuit diagram of an antenna radiator according to an embodiment of the present application when operating.

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

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides an antenna radiator and electronic equipment. The details will be described below separately. Wherein the antenna radiator may be provided in an electronic device. The electronic device may be a smart phone, a tablet computer, or other devices, and may also be a game device, an AR (Augmented Reality) device, an automobile device, a data storage device, an audio playing device, a video playing device, a notebook computer, a desktop computing device, or other devices.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. The electronic device 100 includes a cover plate 10, a display screen 20, a middle frame 30, a circuit board 40, a battery 50, a rear cover 60, and an antenna radiator 70.

The display screen 20 may be used to display information such as images, text, and the like. The Display 20 may be a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display.

The cover plate 10 may be mounted on the middle frame 30, and the cover plate 10 covers the display screen 20 to protect the display screen 20 from being scratched or damaged by water. The cover 10 may be a clear glass cover so that a user may view the contents displayed by the display screen 20 through the cover 10. The cover plate 10 may be a glass cover plate of sapphire material.

The display screen 20 may be mounted on the middle frame 30 and connected to the rear cover 60 through the middle frame 30 to form a display surface of the electronic device 100. The display 20 serves as a front case of the electronic apparatus 100, and forms a housing of the electronic apparatus 100 together with the rear cover 60 for accommodating other electronic components of the electronic apparatus 100. For example, the housing may be used to house the electronics of the electronic device 100, such as a processor, memory, one or more sensors, lighting elements, and the like.

The display screen 20 may include a display area as well as a non-display area. Wherein the display area performs the display function of the display screen 20 for displaying information such as images, text, etc. The non-display area does not display information. The non-display area can be used for arranging electronic devices such as a camera and a display screen touch electrode.

The display screen 20 may be a full-face screen. At this time, the display screen 20 may display information in a full screen, so that the electronic apparatus 100 has a large screen occupation ratio. The display screen 20 includes only a display region and does not include a non-display region, or the non-display region has a small area for a user. At this time, electronic devices such as a camera and a proximity sensor in the electronic apparatus 100 may be hidden under the display screen 20, and the fingerprint recognition module of the electronic apparatus 100 may be disposed on the rear cover 60 of the electronic apparatus 100.

The structure of the display screen 20 is not limited to this. For example, the display screen 20 may also be a shaped screen.

The middle frame 30 may have a thin plate-like or sheet-like structure, or may have a hollow frame structure. The middle frame 30 is used to provide support for the electronic components in the electronic device 100 to mount the electronic components in the electronic device 100 together. For example, the camera, the receiver, the circuit board 40, the battery 50, and other electronic components in the electronic apparatus 100 may be mounted on the middle frame 30 to be fixed.

The circuit board 40 may be mounted on the middle frame 30. The circuit board 40 may be a motherboard of the electronic device 100. One, two or more electronic devices such as a microphone, a speaker, a receiver, an earphone interface, a universal serial bus interface (USB interface), a camera assembly, a distance sensor, an ambient light sensor, a gyroscope, and a processor may be integrated on the circuit board 40.

The circuit board 40 may have a radio frequency circuit, a first ground terminal 41, a feeding terminal 42, and a second ground terminal 43. The feeding terminal 42 may be electrically connected to a feeding point of the antenna radiator 70, so as to feed the rf signal transmitted by the rf circuit to the antenna radiator 70. The first ground terminal 41 and the second ground terminal 43 may implement grounding of the antenna radiator 70.

The battery 50 may be mounted on the middle frame 30. Meanwhile, the battery 50 is electrically connected to the circuit board 40 to enable the battery 50 to power the electronic device 100. The circuit board 40 may have a power management circuit disposed thereon. The power management circuit is used to distribute the voltage provided by the battery 50 to the various electronic devices in the electronic apparatus 100. The battery 50 may be a rechargeable battery, among others. For example, the battery 50 may be a lithium ion battery.

The rear cover 60 is located on a side of the circuit board 40 away from the display screen 20, that is, the rear cover 60 is located at an outermost portion of the electronic device 100 and is used to form an outer contour of the electronic device 100. The rear cover 60 may be integrally formed. In the forming process of the rear cover 60, structures such as a rear camera hole and a fingerprint identification module mounting hole can be formed on the rear cover 60.

The rear cover 60 may be made of metal, such as magnesium alloy, stainless steel, etc. When the back cover 60 is a metal back cover, a hole, etc. may be formed in the metal back cover corresponding to the antenna radiator 70 to form a clearance area of the antenna radiator 70 on the metal back cover. Note that the material of the rear cover 60 according to the embodiment of the present application is not limited to this, and other methods may be employed. For example, the rear cover 60 may be made of plastic. For another example, the rear cover 60 may be made of ceramic or glass. For another example, the rear cover 60 may include a plastic portion and a metal portion, wherein the rear cover region corresponding to the antenna radiator 70 may be the plastic portion, and the other rear cover region may be the metal portion.

It can be understood that, as the electronic device 100 has more functions, more devices are mounted inside the electronic device 100, and the size of the electronic device 100 is not changed, the additional devices mounted inside the electronic device 100 occupy additional space of the electronic device 100, and the mountable space left for the antenna radiator 70 is also smaller. In the related art, a plurality of antenna radiators 70 are often required to realize transmission of multi-band radio frequency signals, which undoubtedly makes the installation space of the plurality of antenna radiators 70 narrower, and affects the radio frequency performance of the antenna radiators 70. In the embodiment of the present application, by designing the structure of the antenna radiator 70, transmission of radio frequency signals in three different frequency bands can be realized through one antenna radiator 70, the space occupied by the antenna radiator 70 is small, and the radio frequency performance of the antenna radiator 70 is also better. The antenna radiator 70 will be described in detail below as an example.

Referring to fig. 2, fig. 2 is a schematic view illustrating a first structure of an antenna radiator according to an embodiment of the present disclosure. The antenna radiator 70 may be installed in the electronic device 100, and the electronic device 100 may refer to the electronic device 100, which is not described herein.

The antenna radiator 70 may include a first radiation part 71, a second radiation part 72, and a third radiation part 73, which are sequentially connected. The first radiation portion 71 may include two opposite ends, the second radiation portion 72 may include a first end 721 and a second end 722 opposite to each other, and the third radiation portion 73 may also include a third end 731 and a fourth end 732 opposite to each other. The first end 721 of the second radiator 72 is connected to one end of the first radiation portion 71, the other end of the first radiator 71 is a free end 711, the second end 722 of the second radiation portion 72 is connected to the third end 731 of the third spoke portion 73, and the first radiation portion 71, the second radiation portion 72 and the third radiation portion 73 are integrally connected through the second radiation portion 72.

The fourth end 732 of the third radiation part 73 may extend toward the first end 721 of the second radiation part 72 such that the third radiation part 73 and the second radiation part 72 form a ring structure having an opening, and a gap 77 is formed between the third radiation part 73 and the second radiation part 72.

Based on the above structure, the antenna radiator 70 of the present application can transmit radio frequency signals of three frequency bands, where the specific transmission conditions are as follows:

referring to fig. 3, fig. 3 is a schematic view illustrating a second structure of an antenna radiator according to an embodiment of the present disclosure. The first radiation portion 71 may be configured to radiate radio frequency signals of a first frequency band. For example, a feeding point (e.g., feeding point 75 in fig. 3) and a grounding point (e.g., first grounding point 74 in fig. 3) may be disposed on the first radiating portion 71, the grounding point is used for electrically connecting the first radiating portion 71 to a grounding terminal of a circuit board, the feeding point is used for providing electric power to the first radiating portion 71, and when the feeding point and the grounding point are electrically connected to the first radiating portion 71, respectively, the feeding point, the grounding point and the first radiating portion 71 form a first radiating path 101 and form an Inverted-F antenna structure (IFA antenna structure), which may radiate radio frequency signals in a first frequency band outwards.

It can be understood that, when the first radiation portion 71 radiates the radio frequency signal of the first frequency band outwards, the effective length of the first radiation portion 71 is the length of the whole first radiation portion 71.

Referring to fig. 4, fig. 4 is a schematic view illustrating a third structure of an antenna radiator according to an embodiment of the present application. The second radiation portion 72 and the third radiation portion 73 can be electromagnetically coupled through the gap 77 to form an integral body and radiate radio frequency signals of the second frequency band. For example, a feeding point (e.g., a feeding point 75 in fig. 4) and a grounding point (e.g., a second grounding point 76 in fig. 4) may be provided on the whole of the second radiation portion 72 and the third radiation portion 73, which are formed by electromagnetic coupling through the gap 77, the grounding point being used for electrically connecting the whole of the second radiation portion 72 and the third radiation portion 73, which are formed by electromagnetic coupling through the gap 77, with a ground terminal, and the feeding point being used for supplying electric power to the whole of the second radiation portion 72 and the third radiation portion 73, which are formed by electromagnetic coupling through the gap 77.

It is understood that the feeding point may be provided on the second radiation portion 72, and the ground point may be provided on the third radiation portion 73; alternatively, the feeding point is provided on the third radiation portion 73, and the grounding point is provided on the second radiation portion 72; still alternatively, both the feeding point and the ground point are provided on the second radiation portion 72 or the third radiation portion 73.

When the feeding point and the grounding point are respectively electrically connected with the second radiation portion 72 and the third radiation portion 73 through the gap 77, the feeding point, the grounding point, and the second radiation portion 72 and the third radiation portion 73 through the gap 77 can be electromagnetically coupled to form a whole, and the second radiation path 102 can be formed and an inverted F antenna structure can be formed, and the feeding point and the grounding point can radiate radio frequency signals of the second frequency band outwards.

It can be understood that, when the second radiation portion 72 and the third radiation portion 73 are coupled through the gap 77 to form an integral radiator for radiating the radio frequency signal outwards, the effective length of the integral radiator is the length of the longer one of the second radiation portion 72 and the third radiation portion 73. For example, when the length of the second radiation part 72 is greater than the length of the third radiation part 73, the effective length of the entire radiation part is the length of the second radiation part 72. When the length of the second radiation part 72 is smaller than the length of the third radiation part 73, the effective length of the entire radiation part is the length of the third radiation part 73.

Referring to fig. 5, fig. 5 is a schematic view illustrating a fourth structure of an antenna radiator according to an embodiment of the present application. The second radiation portion 72 and the third radiation portion 73 form a ring structure for radiating a radio frequency signal of a third frequency band. For example, a feeding point (e.g., a feeding point 75 in fig. 5) may be disposed on the second radiation portion 72, a grounding point (e.g., a second grounding point 76 in fig. 5) may be disposed on the third radiation portion 73, the grounding point being used to electrically connect the annular structure formed by the second radiation portion 72 and the third radiation portion 73 with the ground, and the feeding point being used to supply electric power to the annular structure formed by the second radiation portion 72 and the third radiation portion 73. When the feeding point and the grounding point are electrically connected to the loop structure formed by the second radiation portion 72 and the third radiation portion 73, respectively, the feeding point, the grounding point, the second radiation portion 72 and the third radiation portion 73 may form a third radiation path 103 and form a loop antenna structure (loop antenna radiator for short), which may radiate a radio frequency signal of a third frequency band outwards.

It can be understood that when the loop structure formed by the second radiation portion 72 and the third radiation portion 73 radiates radio frequency signals outwards, the effective length is the sum of the lengths of the second radiation portion 72 and the third radiation portion 73.

It can be understood that, in the antenna radiator 70 according to the embodiment of the present application, the second radiation path 102 that radiates the radio frequency signals in the second frequency band and the third radiation path 103 that radiates the radio frequency signals in the third frequency band share the second radiation portion 72 and the third radiation portion 73, but since the second radiation portion 72 and the third radiation portion 73 are coupled through a slot in the second radiation path 102, the effective length of radiation is only the length of the second radiation portion 72 or the length of the third radiation portion 73; in the third radiation path 103, the second radiation portion 72 and the third radiation portion 73 form an annular structure, and the effective radiation length of the annular structure is the sum of the lengths of the second radiation portion 72 and the third radiation portion 73, and as a result, the effective radiation length of the second radiation path 102 is different from that of the third radiation path 103, and the antenna radiator 70 can radiate radio frequency signals of two different frequency bands through the second radiation portion 72 and the third radiation portion 73.

In the antenna radiator 70 according to the embodiment of the present application, the first radiation portion 71 is configured to radiate a radio frequency signal in a first frequency band, the second radiation portion 72 and the third radiation portion 73 realize electromagnetic coupling through the gap 77 and are configured to radiate a radio frequency signal in a second frequency band, and an annular structure formed by the second radiation portion 72 and the third radiation portion 73 is configured to radiate a radio frequency signal in a third frequency band. Furthermore, the antenna radiator 70 according to the embodiment of the present invention can simultaneously transmit radio frequency signals in three frequency bands by feeding power to the antenna radiator 70 with a small area, and the antenna radiator 70 has a small overall size, occupies a small space inside the electronic device 100, and can reduce the difficulty in mounting the antenna radiator 70.

The antenna radiator 70 according to the embodiment of the present application may radiate a radio frequency signal of one frequency band alone, or may radiate the three radio frequency signals simultaneously.

Specifically, when the rf circuit feeds the antenna radiator 70 with the rf signal of a single band, for example, when the rf signal of the N78(3400MHZ to 3600MHZ) band is fed, the feeding point, the grounding point and the first radiator 71 form the first radiation path 101, which can radiate the rf signal of the band to the outside of the electronic device 100. When a radio frequency signal in the N41(2515MHZ to 2675MHZ) band is fed, the feeding point, the grounding point, and the second radiation path 102 formed by the second radiation portion 72 and the third radiation portion 73 together via the gap 77 and the integrated structure formed by electromagnetic coupling can radiate the radio frequency signal in the band to the outside of the electronic device 100. When a radio frequency signal of the N79(4800MHZ to 4900MHZ) band is fed, the feeding point, the grounding point, and the third radiation path 103 in the loop formed by the second radiation portion 72 and the third radiation portion 73 can radiate the radio frequency signal of the band to the outside of the electronic device 100.

When the rf circuit simultaneously feeds rf signals of three bands to the antenna radiator 70, the first radiation path 101 may radiate rf signals of a first band, such as an N78 band, at the same time, the second radiation path 102 may radiate rf signals of a second band, such as an N41 band, and the third radiation path 103 may radiate rf signals of a third band, such as an N79 band. At this time, in the second radiation path 102 and the third radiation path 103, the second radiation portion 72 and the third radiation portion 73 are multiplexed, and the currents in the second radiation portion 72 and the third radiation portion 73 are the superposition of the rf signal current in the second frequency band and the rf signal current in the third frequency band.

It should be noted that the first radiation path 101, the second radiation path 102, and the third radiation path 103 may be provided with their own feeding point and grounding point. The first radiation path 101, the second radiation path 102, and the third radiation path 103 may partially share a feeding point and a grounding point.

Specifically, referring to fig. 6, fig. 6 is a schematic view of a second structure of the electronic device according to the embodiment of the present application. The antenna radiator 70 may also include a first ground point 74, a feed point 75 and a second ground point 76. The first grounding point 74 may be located on the first radiating portion 71, the second grounding point 76 may be located on the third radiating portion 73, and the feeding point 75 may be located on the first radiating portion 71 or the second radiating portion 72.

The first radiation path 101 may include the first ground point 74, the feeding point 75, and the first radiation portion 71. The second radiation path 102 may include the feeding point 75, the second grounding point 76, and an integral structure formed by the second radiation portion 72 and the third radiation portion 73 through the gap 77 for electromagnetic coupling. The third radiation path 103 may include the feeding point 75, the second ground point 76, and a loop-shaped third radiation path formed by the second radiation portion 72 and the third radiation portion 73. That is, the first radiation path 101, the second radiation path 102, and the third radiation path 103 may share one feeding point 75, so that routing of the rf circuit on the circuit board 40 to feed signals to the antenna radiator 70 may be simplified. Meanwhile, the second radiation portion 72 and the third radiation portion 73 may share the second ground point 76, and the routing of the antenna radiator 70 to the circuit board 40 may also be simplified.

The first ground terminal 41 of the circuit board 40 may be electrically connected to the first ground point 74 through a ground wire, a ground spring, etc., the feeding terminal 42 of the circuit board 40 may be electrically connected to the feeding point 75 through a feeding line, a feeding spring, etc., and the second ground terminal 43 of the circuit board 40 may also be electrically connected to the second ground point 76 through a ground wire, a ground spring, etc.

For example, the electronic device 100 may further include a first resilient piece 81, a second resilient piece 82, and a third resilient piece 83. One end of the first elastic sheet 81 is electrically connected to the first ground terminal 41, and the other end of the first elastic sheet 81 is electrically connected to the first ground point 74. One end of the second elastic piece 82 is electrically connected to the feeding end 42, and the other end of the second elastic piece 82 is electrically connected to the feeding point 75. One end of the third elastic piece 83 is electrically connected to the second ground terminal 43, and the other end of the third elastic piece 83 is electrically connected to the second ground point 76.

The three elastic sheets are adopted to realize the electrical connection between the circuit board 40 and the antenna radiator 70, and the antenna radiator 70 and the circuit board 40 are not easy to separate by utilizing the elastic deformation performance of the elastic sheets, so that the reliability of the electrical connection between the antenna radiator 70 and the circuit board 40 is ensured.

In the antenna radiator 70 and the electronic device 100 of the embodiment of the application, the radio frequency signal transmitted by the radio frequency circuit on the circuit board 40 may be fed to the antenna radiator 70 through the feeding terminal 42 and the feeding point 75, and then radiated into the free space through the antenna radiator 70. By feeding at a feeding point 75 on the antenna radiator 70 and grounding the first grounding point 74 and the second grounding point 76, three resonance frequencies can be generated for transmission of radio frequency signals of three frequency bands, respectively.

Referring to fig. 7, fig. 7 is a diagram illustrating S11 parameters of an antenna radiator according to an embodiment of the present disclosure. As can be seen from fig. 7, the antenna radiator 70 can cover three bands of 2515MHZ to 2675MHZ, 3400MHZ to 3600MHZ, and 4800MHZ to 4900MHZ at an impedance bandwidth of-4 db. That is, the antenna radiator 70 according to the embodiment of the present application can implement transmission of radio frequency signals in three different frequency bands.

Specifically, the feeding point 75, the first grounding point 74 and the first radiation portion 71 may form the first radiation path 101 described above to radiate the radio frequency signal of the first frequency band. Also, the feeding point 75, the first ground point 74 and the first radiation portion 71 form an inverted IFA antenna radiator having a mode of a quarter wavelength.

As shown in fig. 8, fig. 8 is a current distribution diagram of an antenna radiator at 3500MHZ according to an embodiment of the present invention. The free end 711 of the first radiation part 71 is an electric field strong point, where the voltage is maximum and the current is minimum; the first ground point 74 is a strong current point (a strong magnetic field point), and the first ground point 74 has the largest current and the smallest voltage.

The feeding point 75, the second grounding point 76, and the integral structure formed by the second radiation portion 72 and the third radiation portion 73 through the gap 77 through electromagnetic coupling may form the second radiation path 102 described above to radiate radio frequency signals of the second frequency band. The feeding point 75, the second ground point 76, and the second and

third radiation portions

72 and 73 are electromagnetically coupled through the gap 77 to form an IFA antenna radiator, which may have a quarter-wavelength mode.

As shown in fig. 9, fig. 9 is a current distribution diagram of an antenna radiator at 2620MHZ according to an embodiment of the present application. The place where the second radiation part 72 and the third radiation part 73 are connected (the place where the second end 722 of the second radiation part 72 and the third end 731 of the third radiation part 73 are connected) is an electric field strong point, where the voltage is maximum and the current is minimum; the second ground point 76 is a current intensity point (magnetic field intensity point), and the second ground point 76 has the largest current and the smallest voltage.

The feeding point 75, the second grounding point 76, and the loop structure formed by the second radiation portion 72 and the third radiation portion 73 together form the third radiation path 103 described above to radiate radio frequency signals of the third frequency band. The feeding point 75, the loop structure formed by the second radiation portion 72 and the third radiation portion 73, and the second ground point 76 form a loop antenna radiator having a mode of one wavelength.

Fig. 10 is a diagram illustrating a current distribution at 4940MHZ of an antenna radiator according to an embodiment of the present invention, as shown in fig. 10. The second grounding point 76, where the second radiation portion 72 and the third radiation portion 73 are connected (where the second end 722 of the second radiation portion 72 and the third end 731 of the third radiation portion 73 are connected) is a current maximum point, and the current can flow between one maximum point and one minimum point at the intermediate portion 723 of the second radiation portion 72 and the intermediate portion 733 of the third radiation portion 73. The current is mainly concentrated at the second grounding point 76 and the connection of the second radiation portion 72 and the third radiation portion 73.

It is understood that, according to the principle of the IFA antenna radiator, the distance between the feeding point 75 and the grounding points (e.g., the first grounding point 74, the second grounding point 76), and the distance between the feeding point 75 and the end of the radiator (e.g., the free end 711 of the first radiating portion 71, the second end 722 of the second radiating portion 72, or the third end 731 of the third radiating portion 73) can affect the effective electrical length of the IFA antenna radiator.

Specifically, as the distance between the feeding point 75 and the ground point and the distance between the feeding point 75 and the end of the radiator increases, the effective electrical length of the antenna radiator 70 increases, and as it is known from the wavelength equal to the wave velocity divided by the frequency, the higher the frequency, the smaller the wavelength, i.e., as the effective electrical length of the antenna radiator 70 increases, the resonant frequency of the antenna radiator 70 decreases whereas as the distance between the feeding point 75 and the ground point and the distance between the feeding point 75 and the end of the radiator decreases, the effective electrical length of the antenna radiator 70 decreases, and the resonant frequency of the antenna radiator 70 increases.

Referring to fig. 2 again, the feeding point 75 in fig. 2 may be located between the first grounding point 74 and the second radiation portion 72. At this time, in the second IFA antenna radiator formed by the feeding point 75, the first grounding point 74, and the first radiating portion 71 forming the first IFA antenna radiator, and the feeding point 75, the second grounding point 76, and the second radiating portion 72 and the third radiating portion 73 implementing electromagnetic coupling through the gap 77, the adjustable ranges of the first distance between the feeding point 75 and the free end 711 of the first radiating portion 71 and the second distance between the feeding point 75 and the second end 722 of the second radiating portion 72 are moderate, so as to facilitate adjustment of the effective electrical lengths of the first IFA antenna radiator and the second IFA antenna radiator.

Referring to fig. 11 in combination with fig. 3, fig. 11 is a schematic diagram of a fifth structure of an antenna radiator according to an embodiment of the present application. As shown in fig. 3, the projection of the second ground point 76 on the radiator branch formed by the first radiating portion 71 and the second radiating portion 72 may be located on the second radiating portion 72 and below the first ground point 74 and the feeding point 75. At this time, the feeding point 75 may be located between the first grounding point 74 and the second grounding point 76. The first distance between the feed point 75 and the first ground point 74 and the second distance between the feed point 75 and the second ground point 76 are adjustable within a moderate range, which facilitates adjustment of the effective electrical lengths of the first IFA antenna radiator and the second IFA antenna radiator.

As shown in fig. 11, a projection of the second grounding point 76 on the radiator branch formed by the first radiation portion 71 and the second radiation portion 72 may be located between the first grounding point 74 and the feeding point 75. At this time, the path of the loop antenna radiator formed by the feeding point 75, the second radiating portion 72 and the second grounding point 76 is long, and the selectable position range of the second grounding point 76 is wider, so that the range of the third frequency band can be adjusted conveniently.

Furthermore, as can be seen from comparing fig. 3 and 11, when the projection of the second ground point 76 on the radiator branch formed by the first radiation portion 71 and the second radiation portion 72 is located below the feeding point 75 and the first ground point 74, compared to a scheme in which the projection of the second ground point 76 on the first radiation portion 71 and the second radiation portion 72 is located between the feeding point 75 and the first radiation portion 71, the distance between the third radiation portion 73 and the second radiation portion 72 of the antenna radiator 70 can be appropriately smaller, and the area of the antenna radiator 70 can be reduced.

It will be appreciated that the feeding point 75 and the first ground point 74 may be located on the first radiating portion 71, and that the feeding point 75, the first ground point 74 and the first radiating portion 71 may form a first IFA antenna radiator. By adjusting the length and width of the first radiating portion 71 and the distance between the first grounding point 74 and the feeding point 75, the range of the rf signal of the first frequency band radiated outward by the first IFA antenna radiator can be adjusted.

The second grounding point 76 may be located on the third radiation portion 73, and the feeding point 75, the second grounding point 76, the second radiation portion 72 and the third radiation portion 73 may be electromagnetically coupled through the gap 77 to form an integral body, which may also form the second IFA antenna radiator. By adjusting the lengths and widths of the second and

third radiating portions

72 and 73 and the distance between the second grounding point 76 and the feeding point 75, the range of the rf signal of the second frequency band radiated outward by the second IFA antenna radiator can be adjusted.

Also, a loop antenna radiator may be formed between the feeding point 75, the second radiation part 72, the third radiation part 73, and the second ground point 76. By adjusting the lengths of the second radiation portion 72 and the third radiation portion 73, the range of the radio frequency signal of the third frequency band radiated outward by the loop antenna radiator can be adjusted.

Referring to fig. 12, fig. 12 is a schematic view illustrating a sixth structure of an antenna radiator according to an embodiment of the present application. The first radiation portion 71 may include a first side 711 and a second side 712 disposed opposite to each other, the second radiation portion 72 includes a third side 721 and a fourth side 722 disposed opposite to each other, and the third radiation portion 73 includes a fifth side 731 and a sixth side 732 disposed opposite to each other.

The fourth side 722 and the fifth side 731 can be disposed opposite to each other with a gap 77 therebetween. The first side 711 may be in the same plane as the sixth side 732, and the second side 712 may be in the same plane as the third side 721.

That is, the width B1 of the first radiation part 71 of the antenna radiator 70 may be equal to the sum of the width B2 of the second radiation part 72, the width B3 of the third radiation part 73, and the width B4 of the slot 77 between the second radiation part 72 and the third radiation part 73. At this time, the length of the first radiation portion 71 is short, and the area occupied by the first radiation portion 71, the second radiation portion 72, and the third radiation portion 73 is also small.

It should be noted that the antenna radiator 70 and the electronic device 100 according to the embodiment of the present application can adjust the ranges of the first frequency band, the second frequency band, and the third frequency band by adjusting the shape and size of the antenna radiator 70 and the positions of the feeding point 75, the first grounding point 74, and the second grounding point 76.

That is, the first frequency band, the second frequency band and the third frequency band may be three different frequency bands, so as to realize transmission of multi-band radio frequency signals. At least two of the first frequency band, the second frequency band, and the third frequency band may also be the same, so as to widen the bandwidth of the antenna radiator 70. For example, the first frequency band, the second frequency band or the third frequency band may be any one of radio frequency signals of a medium frequency band, a high frequency band and a low frequency band of a cellular frequency band, radio frequency signals of a wifi frequency band, and radio frequency signals of a GPS frequency band.

Specifically, with continued reference to fig. 7, the first frequency band may be an N78(3400MHZ to 3600MHZ) frequency band, the second frequency band may be an N41(2515MHZ to 2675MHZ) frequency band, and the third frequency band may be an N79(4800MHZ to 4900MHZ) frequency band. Furthermore, the antenna radiator 70 of the embodiment of the present application can implement transmission of radio frequency signals of three different frequency bands for 5G communication by feeding power to the antenna radiator 70 with a small area, and compared with a scheme in which a plurality of antenna radiators 70 are disposed on the electronic device 100 to implement transmission of radio frequency signals of the three different frequency bands, the antenna radiator 70 of the embodiment of the present application has a smaller area.

The first frequency band may also be a Wireless Fidelity (wifi) 2400MHZ frequency band; the second frequency band may also be a satellite signal in an LI (1575.42MHZ) frequency band transmitted by a Global Positioning System (GPS for short) satellite; the third frequency band can also be a wifi-5000MHz frequency band. Furthermore, the antenna radiator 70 of the embodiment of the present application can realize the transmission of the radio frequency signals of three different frequency bands of GPS/wifi2.4g/wifi5g by feeding on the antenna radiator 70 with a small area. Compared with a scheme that a plurality of antenna radiators 70 are disposed on the electronic device 100 to realize the transmission of the radio frequency signals in the three different frequency bands, the antenna radiators 70 according to the embodiment of the present application have a smaller area.

The following describes in detail the operation process of the antenna radiator 70 according to the embodiment of the present application with reference to fig. 8 to 10 again, by taking the first frequency band as an N78 frequency band, the second frequency band as an N41 frequency band, and the third frequency band as an N79 frequency band as an example:

as shown in fig. 8, when the rf circuit on the control circuit board 40 of the electronic device 100 radiates the first rf signal in the N78 frequency band outwards, the current of the rf circuit flows into the feeding point 75 from the feeding end 42, and the feeding point 75, the first grounding point 74 and the first radiating portion 71 form a first radiating path 101, so that the first rf signal in the N78 frequency band can be radiated outwards.

As shown in fig. 9, when the rf circuit on the control circuit board 40 of the electronic device 100 radiates the second rf signal in the N41 frequency band outwards, the current of the rf circuit flows into the feeding point 75 from the feeding end 42, and at this time, the feeding point 75, the second grounding point 76, and the second radiating portion 72 and the third radiating portion 73 are electromagnetically coupled through the gap 77, so as to form the second radiating path 102, which radiates the second rf signal in the N41 frequency band outwards.

As shown in fig. 10, when the rf circuit on the control circuit board 40 of the electronic device 100 radiates a third rf signal in the N79 frequency band outwards, the current of the rf circuit flows into the feeding point 75 from the feeding end 42, and the feeding point 75, the second grounding point 76, and the loop structure formed by the second radiating portion 72 and the third radiating portion 73 together form a third radiating path 103, so that the third rf signal in the N79 frequency band can be radiated outwards.

In the antenna radiator 70 and the electronic device 100 of the embodiment of the present application, the radio frequency circuit on the circuit board 40 may directly radiate radio frequency signals of different frequency bands through the antenna radiator 70, and compared with a scheme in which three antenna radiators 70 are provided in the electronic device 100 to radiate three different frequency bands, on one hand, the area of the antenna radiator 70 of the embodiment of the present application is small, the difficulty in installing the antenna radiator 70 is low, on the other hand, the antenna radiator 70 of the embodiment of the present application does not need to set a switch to switch between the three antenna radiators, and the structure of the whole antenna radiator 70 is simpler.

It is understood that, according to the principle of the IFA antenna radiator, changing the inductance of the first radiation path 101 may cause the first radiation path 101 to radiate other radio frequency signals different from the first radio frequency signal; changing the inductance of the second radiation path 102 may also cause the second radiation path 102 to radiate other radio frequency signals than the second radio frequency signal.

The second radiation path 102 is taken as an example for detailed description. Referring to fig. 13, fig. 13 is a partial equivalent circuit diagram of an antenna radiator according to an embodiment of the present disclosure when the antenna radiator operates. The electronic device 100 may further comprise an inductive element 84 and a switch 85. The inductive element 84 may be connected in series with the third resilient tab 83, and the switch 85 may be connected in parallel with the inductive element 84.

When the switch 85 is closed, the inductive element 84 is short-circuited by the switch 85, the second ground terminal 43 is conducted with the second ground point 76 through the third elastic sheet 83, and at this time, the second ground point 76, the second ground terminal 43, the feeding terminal 42, the feeding point 75, and the second radiation path 102 formed by the second radiation portion 72 and the third radiation portion 73 through the gap 77 through electromagnetic coupling can radiate the radio frequency signal in the second frequency band.

When the switch 85 is turned off, the inductive element 84 is connected in series with the third elastic piece 83, the second ground terminal 43 and the second ground point 76 are conducted through the inductive element 84 and the third elastic piece 83, at this time, the total inductance of the second radiation path 102 formed by the second ground point 76, the second ground terminal 43, the feeding terminal 42, the feeding point 75, the second radiation portion 72 and the third radiation portion 73 through the gap 77 through electromagnetic coupling changes, and the second radiation path 102 can radiate a radio frequency signal in a fourth frequency band.

Wherein the fourth frequency band may be different from the second frequency band. For example, when the first frequency Band is an N41 frequency Band, the fourth frequency Band may be a Band 40(2300MHZ to 2400MHZ) frequency Band of Long Term Evolution (Long Term Evolution, LTE). Further, the antenna radiator 70 of the embodiment of the present application can cover four bands of Band 40, N41, N78, and N79 by the control of the switch 85.

It is understood that the first radiation path 101 may also be configured to radiate a radio frequency signal different from the first frequency band by connecting an inductive element in series and connecting a switch to the inductive element in parallel. For a specific embodiment, reference may be made to the manner of the second radiation path, which is not described herein again.

It should be noted that the antenna radiator 70 according to the embodiment of the present application may be formed by using a 3D-MID process technology using a three-dimensional laser. For example, the antenna radiator 70 may be formed directly on the substrate medium by laser direct structuring, first, laser-induced modification material is formed, and then, selective metal plating is performed, so that the antenna radiator 70 may not occupy an additional space inside the electronic device 100, and may not increase the thickness of the electronic device 100, and the electronic device 100 may be designed to be light and thin.

It will be appreciated that the antenna radiator 70 may also be formed on the base medium using other processes, such as: the antenna radiator 70 may be laser activated by laser induced general materials and then selectively metal plated to form the antenna radiator. For another example: the antenna radiator 70 may be formed by adhering and fixing the antenna radiator 71 inside the electronic device 100 by using a patch antenna process.

The antenna radiator 70 may be fixed on a plastic frame of the electronic device 100. The plastic bracket is a bracket disposed between the battery 50, the circuit board 40 and the rear cover 60, and is used for fixing and supporting the battery 50 and the circuit board 40. And the antenna radiator 70 may be disposed on the outer surface of the side of the plastic bracket.

The antenna radiator 70 is disposed on the plastic support, the distance between the antenna radiator 70 and the circuit board 40 is moderate, and when the feeding point 75, the first grounding point 74, and the second grounding point 76 are electrically connected to the feeding terminal 42, the first grounding terminal 41, and the second grounding terminal 43, respectively, the number of traces between the antenna radiator 70 and the circuit board 40 can be reduced, and the difficulty in mounting the antenna radiator 70 can be reduced.

Of course, the antenna radiator 70 may also be fixed to other components of the electronic device 100, such as the inner surface of the plastic rear cover 60 and the non-metal portion of the middle frame 30. The embodiment of the present application does not limit the specific position of the antenna radiator 71.

In order to make the rf performance of the antenna radiator 70 more excellent, a clearance area may be disposed around the antenna radiator 70, that is, no metal member is disposed in certain areas of the upper, lower, left, and right sides of the antenna radiator 70, so as to avoid the influence of the metal member on the rf performance of the antenna radiator 70. Specifically, a clearance area of 2 mm may be provided between the edge of the middle frame 30 of the electronic device 100 and the outer edge of the antenna radiator 70, and a clearance area of 4 mm may be provided between the circuit board 40 and the antenna radiator 70.

It can be understood that the electronic device 100 according to the embodiment of the present disclosure may also include a plurality of antenna radiators 70, the antenna radiators 70 may be located at different positions of the electronic device 100, and correspondingly, the circuit board 40 may be provided with a plurality of sets of radio frequency circuits, a feeding terminal, and a grounding terminal, and further, when each set of antenna radiators 70 is electrically connected to the feeding terminal, the grounding terminal, and the radio frequency circuit on the circuit board 40, radio frequency signals in three frequency bands may be radiated.

When at least two antenna radiators 70 of the plurality of antenna radiators 70 are used for radiating wireless signals in the same frequency band, the antenna radiators 70 of the present application may form a Multiple-Input Multiple-Output (MIMO) antenna combination of a high frequency combination in a cellular frequency band, a MIMO antenna combination of a high frequency combination in a cellular frequency band, and a MIMO antenna combination of a wifi frequency band.

For example, as shown in fig. 14, fig. 14 is a third schematic structural diagram of an electronic device provided in the embodiment of the present application. The electronic device 100 of the embodiment of the application may include four antenna radiators 70, and the four antenna radiators 70 may be disposed at four corners of the electronic device 100. Each antenna radiator 70 may radiate radio frequency signals of N41 frequency band, N78 frequency band, and N79 frequency band, and further, the four antenna radiators 70 may form a 4 × 4MIMO5G antenna system covering the N41 frequency band, the N78 frequency band, and the N79 frequency band.

For another example, the antenna radiator 200 and the electronic device 100 in the embodiment of the present application may include four antenna radiators 70, each antenna radiator 70 may radiate radio frequency signals in a GPS frequency band, a wifi2.4G frequency band, and a wifi5G frequency band, and then, the four antenna radiators 70 may form a 4 × 4MIMO5G antenna system covering the GPS frequency band, the wifi2.4G frequency band, and the wifi5G frequency band.

It should be noted that the multiple antenna radiators 70 may also radiate radio frequency signals of different frequency bands, for example, one antenna radiator 70 may radiate radio frequency signals of the N41 frequency band, the N78 frequency band, and the N79 frequency band, and another antenna radiator 70 may radiate radio frequency signals of the GPS frequency band, the wifi2.4g frequency band, and the wifi5g frequency band, and further, radio frequency signals of more frequency bands may be covered by the multiple antenna radiators 70.

In the description of the present application, it is to be understood that terms such as "first", "second", and the like are used merely to distinguish one similar element from another, and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated.

The antenna radiator and the electronic device provided by the embodiments of the present application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. An antenna radiator, comprising a first ground point, a feed point, and a second ground point, wherein the antenna radiator realizes feeding through the feed point, and the antenna radiator realizes grounding through the first ground point and the second ground point, the antenna radiator further comprising:

a first radiation section;

2. The antenna radiator of claim 1, wherein the first grounding point is located on the first radiating portion, the second grounding point is located on the third radiating portion, and the feeding point is located on the first radiating portion or the second radiating portion.

3. The antenna radiator of claim 2 wherein the feed point is located between the first ground point and the second ground point.

4. The antenna radiator of claim 1, wherein the first radiating portion includes first and second oppositely disposed side surfaces, the second radiating portion includes third and fourth oppositely disposed side surfaces, the third radiating portion includes fifth and sixth oppositely disposed side surfaces, and the fourth and fifth side surfaces form the gap;

the first side face and the sixth side face are in the same plane, and the second side face and the third side face are in the same plane.

5. An antenna radiator as claimed in claim 1, wherein the first, second and third frequency bands are different from each other.

6. An antenna radiator as claimed in claim 1, wherein at least two of the first, second and third frequency bands are the same.

7. An electronic device, comprising:

an antenna radiator comprising the antenna radiator of any one of claims 1 to 6; and

8. The electronic device of claim 7, further comprising:

the first elastic sheet is connected with the first grounding end through the first elastic sheet;

the feed end is connected with the feed point through the second elastic sheet; and

and the second grounding end is connected with the second grounding point through the third elastic sheet.

9. The electronic device of claim 8, further comprising:

the inductive element is connected with the third elastic sheet in series; and

a switch connected in parallel with the inductive element;

when the switch is closed, the second grounding end is conducted with the second grounding point through the third elastic sheet, and the second radiation part and the third radiation part realize electromagnetic coupling through the gap and are used for radiating the radio-frequency signal of the second frequency band;

when the switch is turned off, the second grounding end is conducted with the second grounding point through the inductance element and the third elastic sheet, and the second radiation part and the third radiation part realize electromagnetic coupling through a gap and are used for radiating a radio frequency signal of a fourth frequency band;

the fourth frequency band and the second frequency band are different frequency bands.

10. The electronic device of claim 7, wherein the number of the antenna radiators is plural, and the plural antenna radiators are used for implementing multiple-input multiple-output transmission of radio frequency signals.