CN117613543A

CN117613543A - Antenna assembly and electronic equipment

Info

Publication number: CN117613543A
Application number: CN202311644603.0A
Authority: CN
Inventors: 张云帆; 唐海军; 吴小浦; 刘焕红; 闫金锋; 赵嘉城; 李宗尚
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2023-11-30
Filing date: 2023-11-30
Publication date: 2024-02-27

Abstract

The application provides an antenna assembly and electronic equipment. The antenna assembly comprises a first radiator, a first matching circuit, a first feed source, a second radiator and a second matching circuit; the first radiator comprises a first radiation part, the first radiation part comprises a first end, a second end and a first feed point, and the first end is grounded; the first feed source is electrically connected with the first matching circuit to the first feed point so as to enable excitation signals of a first frequency band supporting satellite communication or a second frequency band supporting cellular communication to the first radiator feed source; the second radiator comprises a third end, a fourth end and a first connecting point, and the third end and the second end form a coupling gap; the second matching circuit comprises a first matching sub-circuit, one end of the first matching sub-circuit is electrically connected with the first connecting point, and the other end of the first matching sub-circuit is grounded, and the first matching sub-circuit comprises a first switch and a first matching branch circuit which are connected in series; when the antenna component works in the first frequency band, the first switch is conducted so as to connect the third end to the ground through the first matching sub-circuit; the first switch is turned off when the antenna assembly is operating in the second frequency band.

Description

Antenna assembly and electronic equipment

Technical Field

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

Background

With the development of technology, electronic devices such as mobile phones with communication functions have become more and more popular and more powerful. An antenna assembly is typically included in an electronic device to enable communication functions of the electronic device. However, when the antenna assembly in the electronic device in the related art is in communication with the satellite, energy that is often fed is high, and a device (such as a switch) of the antenna assembly is subjected to a high pressure, so that a risk of damaging the device is caused.

Disclosure of Invention

In a first aspect, the present application provides an antenna assembly comprising:

the first radiator comprises a first radiation part, wherein the first radiation part comprises a first end, a first feed point and a second end, and the first end is grounded;

a first matching circuit;

a first feed source electrically connecting the first matching circuit to the first feed point, the first feed source being configured to feed an excitation signal of a first frequency band supporting satellite communication or an excitation signal of a second frequency band supporting cellular communication to the first radiator;

the second radiator comprises a third end, a first connecting point and a fourth end, and the third end is opposite to the second end and is arranged at intervals to form a coupling gap; and

The second matching circuit comprises a first matching sub-circuit, one end of the first matching sub-circuit is electrically connected to the first connecting point, the other end of the first matching sub-circuit is grounded, and the first matching sub-circuit comprises a first switch and a first matching branch circuit which are connected in series;

when the antenna assembly works in the first frequency band, the first switch is conducted so as to connect the third end of the second radiator to the ground through the first matching sub-circuit; when the antenna assembly works in the second frequency band, the first switch is disconnected.

In a second aspect, an embodiment of the present application provides an electronic device, including an antenna assembly according to the first aspect;

the electronic equipment is provided with a top and a bottom which are arranged in a back-to-back mode, and the first radiator and the second radiator of the antenna assembly are arranged at the top of the electronic equipment.

In summary, in the antenna assembly provided in the embodiment of the present application, since the third end of the second radiator and the second end of the first radiator have a coupling gap therebetween, the second radiator can couple (also referred to as EE coupling) the energy of the first radiator through the electric field of the coupling gap. When the second radiator is coupled with the energy of the first radiator through the coupling gap in an electric field coupling mode, a part of energy is radiated to free space, and a part of energy is coupled to the second radiator. Thus, the energy coupled to the second radiator is attenuated compared to the energy of the first radiator, and therefore the voltage experienced by the first switch in the first matching sub-circuit in the second matching circuit is reduced. On the other hand, when the first switch is turned on, the third end of the second radiator is grounded through the first matching sub-circuit in the second matching circuit, so that a portion between the first connection point and the fourth end in the second radiator is shorted. Since the size between the first connection point and the coupling slot is smaller than the size of the second radiator, the main current when the antenna assembly operates in the first frequency band is basically concentrated on the first radiator instead of the second radiator, and therefore the voltage born by the first switch in the first matching sub-circuit is also reduced. For the reasons described above, when the antenna assembly is operating in a first frequency band for communication with a satellite, the first switch is subjected to a lower voltage, thereby reducing or even eliminating the risk of burning out the first switch.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, 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 a first embodiment of the related art;

FIG. 2 is a schematic diagram of a first matching circuit in FIG. 1 according to an embodiment;

FIG. 3 is a schematic diagram of a current mode of mode one of the antenna assembly shown in FIG. 1 when operating in a first frequency band for communication with a satellite;

FIG. 4 is a schematic diagram of a current mode of mode two of the antenna assembly shown in FIG. 1 when operating in a first frequency band for communication with a satellite;

FIG. 5 is a schematic diagram of a current mode of mode three of the antenna assembly of FIG. 1 operating in a second frequency band for communication with a cell;

FIG. 6 is a schematic diagram of a current mode of mode four when the antenna assembly of FIG. 1 is operating in a second frequency band for communication with a cell;

FIG. 7 is a schematic diagram of S11 and efficiency simulation of the antenna assembly shown in FIG. 1;

Fig. 8 is a directional diagram of the antenna assembly shown in fig. 1 when operating in a transmit frequency band of a first frequency band;

fig. 9 is a directional diagram of the antenna assembly shown in fig. 1 when operating in a receiving band of a first frequency band;

fig. 10 is a schematic diagram of an antenna assembly according to a first embodiment of the present application;

FIG. 11 is a schematic diagram of the second matching circuit of FIG. 10;

FIG. 12 is a schematic diagram of a current mode of the antenna assembly of FIG. 10 when operating in a first frequency band;

FIG. 13 is a graph showing the current intensity of the antenna assembly of FIG. 10 when the antenna assembly is operating in a first frequency band;

fig. 14 (a) is a schematic diagram of an antenna assembly according to another embodiment of the present application;

fig. 14 (b) is a schematic diagram of the second matching circuit in fig. 14 (a);

fig. 15 is a schematic diagram of a current distribution when the antenna assembly of fig. 14 (a) is operated in a transmitting sub-band of a first frequency band;

fig. 16 is a schematic diagram illustrating a current distribution of the antenna assembly of fig. 14 (a) operating in a receiving sub-band of the first frequency band;

FIG. 17 is a schematic diagram of a second matching circuit according to an embodiment of the present disclosure;

fig. 18 is a simulation diagram of voltage received by the first switch and the second switch of the antenna assembly of fig. 14 as a function of frequency;

fig. 19 is a schematic diagram of S11 and efficiency simulation of the antenna assembly shown in fig. 10;

Fig. 20 is a directional diagram of the antenna assembly of fig. 14 operating in a transmit sub-band of a first frequency band;

fig. 21 is a directional diagram of the antenna assembly of fig. 14 operating in a receive sub-band of a first frequency band;

fig. 22 is a schematic diagram of a current distribution of a second resonant mode of the antenna assembly provided in fig. 10;

fig. 23 is a schematic diagram of a current distribution of a third resonant mode of the antenna assembly provided in fig. 10;

FIG. 24 is a schematic diagram of an antenna assembly of an IFA antenna according to the related art;

fig. 25 is a pattern of the antenna assembly provided in fig. 24;

fig. 26 is a comparative schematic diagram of a simulation schematic of the antenna assembly provided in fig. 1 and 14;

fig. 27 is a simulation diagram of efficiency of the antenna assembly shown in fig. 1 and 14 operating in a first frequency band;

fig. 28 is a gain table of the antenna assembly shown in fig. 1 when operating in the first frequency band;

fig. 29 is a gain table of the antenna assembly shown in fig. 14 when operating in the first frequency band;

fig. 30 is a schematic view of the distance between the first connection point of the antenna assembly provided in fig. 14 and the coupling slot;

fig. 31 is a schematic view of an antenna assembly according to another embodiment of the present application;

fig. 32 is an equivalent schematic diagram of the antenna assembly of fig. 31 with the fifth end open;

fig. 33 is a current distribution diagram of a fourth resonant mode of the antenna assembly of fig. 32;

Fig. 34 is a schematic diagram of a current distribution of a fifth resonant mode of the antenna assembly of fig. 32;

fig. 35 is a current distribution diagram of a sixth resonant mode of the antenna assembly of fig. 32;

fig. 36 is a partial structural schematic view of the antenna assembly shown in fig. 31;

fig. 37 is a schematic diagram of a current mode of the antenna assembly of fig. 31 supporting a third frequency band;

fig. 38 is a schematic view of an antenna assembly according to another embodiment of the present disclosure;

fig. 39 is a schematic diagram of an antenna assembly according to another embodiment of the present application;

fig. 40 is a schematic illustration of an identification of another angle of the antenna assembly provided in fig. 10;

FIG. 41 is a schematic diagram of an electronic device according to an embodiment of the present application;

fig. 42 is a partial schematic structural view of the electronic device shown in fig. 41;

fig. 43 is a circuit block diagram of an electronic device according to an embodiment of the present application.

Reference numerals for main elements:

the electronic device 1, the antenna assembly 10, the middle frame 30, the floor 40, the processor 50, the display screen 70 and the shell 90;

the first radiator 110, the first feed source S1, the first radiating part 111, the first end 1111, the first feed point P1, the second end 1112, the second radiating part 112, the fifth end 1121, the second connection point P4, the ground point G0;

A second radiator 120, a third end 121, a second feeding point P2, a first connection point P3, a fourth end 122, a coupling slot 120a, a third radiating portion 120b, and a fourth radiating portion 120c;

a second matching circuit M2, a first matching sub-circuit 131, a first switch 1311, a first connection 131a, a second connection 131b, and a first matching branch 1312;

a second matching sub-circuit 132, a second switch 1321, a third connection 132a, a fourth connection 132b, a second matching branch 1322;

a third matching circuit M3, a third switch 151, a fifth connection 1511, a sixth connection 1512, and a third matching branch 152;

a second feed S2, a third feed S3, and a fourth switch 160;

top 1a, bottom 1b, top 11a, side 11b, preset segment 11c;

the frame body 310, the frame 320, the outer surface 320a, the first slit 320b, the second slit 320c, the third slit 320d;

switch SW0, matching sub-circuit 13a, matching sub-circuit 13b, series unit 13c.

Detailed Description

The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. It is apparent that the embodiments described herein are only some embodiments, not all embodiments. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments provided herein without any inventive effort, are within the scope of the present application.

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

The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example: an assembly or device incorporating one or more components is not limited to the listed one or more components, but may alternatively include one or more components not listed but inherent to the illustrated product, or one or more components that may be provided based on the illustrated functionality.

An embodiment of the present application provides an antenna assembly 10, and before describing the antenna assembly 10 provided in the embodiment of the present application, description and comparative analysis are performed on some antenna structures used in the antenna assembly 10 provided in the embodiment of the present application. These antenna assemblies 10 may be considered as the antenna assemblies 10 of the related art (not prior art) prior to the improvement of the antenna assemblies 10 provided by the embodiments of the present application.

The antenna assembly 10 of the related art is often fed with higher energy (also referred to as energy flow) when the antenna assembly 10 is in communication with a satellite, for example, when the antenna assembly 10 is operating in a first frequency band in communication with the satellite. Typically, the rf end plate level power may reach 37dBm, which may create significant stress on other antennas or devices. The withstand voltage of the low voltage switch commonly used in the antenna assembly 10 is typically only 40V, and the withstand voltage of the high voltage switch is also only 80V at the highest. Therefore, it is a difficult problem how to operate the antenna assembly 10 in the first frequency band for satellite communication without over-voltage of the switch.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, fig. 1 is a schematic diagram of an antenna assembly according to a first embodiment of the related art; FIG. 2 is a schematic diagram of a first matching circuit in FIG. 1 according to an embodiment; FIG. 3 is a schematic diagram of a current mode of mode one of the antenna assembly shown in FIG. 1 when operating in a first frequency band for communication with a satellite; fig. 4 is a schematic diagram of a current mode of mode two when the antenna assembly shown in fig. 1 is operating in a first frequency band for communication with a satellite. In the related art, the antenna assembly 10 includes a first radiator 110, a first matching circuit M1, a first feed source S1, a second radiator 120, and a second matching circuit M2. The first radiator 110 includes a first end 1111, a first feeding point P1, and a second end 1112. The first end 1111 is grounded. The first feed source S1 electrically connects the first matching circuit M1 to the first feed point P1. The first feed source S1 is used for supporting a first frequency band of satellite communication or a second frequency band of cellular communication. The second radiator 120 includes a third end 121, a first connection point P3, and a fourth end 122. The third end 121 is opposite to the second end 1112 and is spaced apart to form a coupling gap 120a. The second matching circuit M2 is electrically connected to the first connection point P3.

The first matching circuit M1 includes a switch SW0, and the switch SW0 of the first matching circuit M1 has an on state (on) and an off state (off). When the switch SW0 of the first matching circuit M1 is in the on state, the antenna assembly 10 supports a first frequency band for satellite communication; when the switch SW0 of the first matching circuit M1 is in an off state, the antenna assembly 10 supports the second frequency band of cellular communication.

The second radiator 120 receives the energy of the first feed S1 through the coupling slit 120a by Electric Field coupling (Electric Field-Electric Field, EE) with the first radiator 110. Thus, the antenna assembly 10 is also referred to as an EE form antenna, or E-E antenna, or EE form antenna, or EE antenna.

When the antenna assembly 10 supports a first frequency band for communication with a satellite (such as, but not limited to, an antenna satellite), the current distribution of the first radiator 110 and the second radiator 120 is shown in fig. 3 and 4. For convenience of description, the current mode shown in fig. 3 is simply referred to as mode one (may also be referred to as mode 1); the current mode shown in fig. 4 is referred to as mode two (which may also be referred to as mode 2). Wherein mode one includes a quarter wavelength mode of the first end 1111 to the second end 1112, accompanied by a current of the third end 121 to the fourth end 122. In particular, the method comprises the steps of, The current on the first 1111 to second 1112 terminals is labeled I ₀₁ The current from the third terminal 121 to the fourth terminal 122 is denoted as I ₀₂ Wherein the current I ₀₂ Flow direction and current I of (2) ₀₁ Is the same. In other words, the current of the first radiator 110 is I ₀₁ The current of the second radiator 120 is I ₀₂ Wherein the current I ₀₂ Flow direction and current I of (2) ₀₁ Is the same. From the current distribution of mode one, mode one is also referred to as the radiation mode. Mode two includes a quarter wavelength mode of the first end 1111 to the second end 1112, accompanied by a current flow from the third end 121 to the fourth end 122. Specifically, in mode two, the current on the first 1111 to the second 1112 is labeled I ₀₃ The current from the third terminal 121 to the fourth terminal 122 is denoted as I ₀₄ Wherein the current I ₀₄ Flow direction and current I of (2) ₀₃ Is opposite to the flow direction of the flow. From the current distribution of mode two, mode two is also referred to as the balanced mode. The mode one and the mode two are also referred to as EE dual mode.

Referring to fig. 5 and fig. 6 together, fig. 5 is a schematic diagram of a current mode of a third mode of the antenna assembly shown in fig. 1 when operating in a second frequency band for communication with a cellular; fig. 6 is a schematic diagram of a current mode of mode four when the antenna assembly of fig. 1 is operating in a second frequency band for communication with a cell. When the antenna assembly 10 supports the second frequency band for communication with the cellular, the current distribution of the first radiator 110 and the second radiator 120 is shown in fig. 5 and 6. For convenience of description, the current mode shown in fig. 5 is simply referred to as mode three (may also be referred to as mode 3); the current mode shown in fig. 4 is referred to as mode four (also may be referred to as mode 4). Wherein mode three comprises a quarter wavelength mode of the first end 1111 to the second end 1112, accompanied by a current of the third end 121 to the fourth end 122. Specifically, the current on the first 1111 to the second 1112 is labeled I ₀₅ The current from the third terminal 121 to the fourth terminal 122 is denoted as I ₀₆ Wherein the current I ₀₆ Flow direction and current I of (2) ₀₅ Is the same. In other wordsThe current of the first radiator 110 is I ₀₅ The current of the second radiator 120 is I ₀₆ Wherein the current I ₀₆ Flow direction and current I of (2) ₀₅ Is the same. From the current distribution of mode three, mode three is also referred to as the radiation mode. Mode four includes a quarter wavelength mode of the first end 1111 to the second end 1112, accompanied by a current of the third end 121 to the fourth end 122. Specifically, in mode four, the current on the first end 1111 to the second end 1112 is labeled I ₀₇ The current from the third terminal 121 to the fourth terminal 122 is denoted as I ₀₈ Wherein the current I ₀₈ Flow direction and current I of (2) ₀₇ Is opposite to the flow direction of the flow. From the current distribution of mode four, mode four is also referred to as the balanced mode. The mode three and the mode four are also referred to as EE dual mode.

In one embodiment, the second frequency band includes a first sub-band and a second sub-band. The first sub-band supported by the mode three, and the second sub-band supported by the mode four. In an embodiment, the first sub-band is a B3 band, and the second sub-band is a B41 band.

With continued reference to fig. 2, the first matching circuit M1 includes a switch SW0, and the switch SW0 of the first matching circuit M1 has an on state (on) and an off state (off). When the switch SW0 of the first matching circuit M1 is in the on state, the antenna assembly 10 supports a first frequency band for satellite communication; when the switch SW0 of the first matching circuit M1 is in an off state, the antenna assembly 10 supports the second frequency band of cellular communication.

The first radiator 110 is also referred to as a main radiator or main branch, and the second radiator 120 is also referred to as a parasitic radiator or parasitic branch. In a related embodiment, the first matching circuit M1 is electrically connected to the first feeding point P1, and the first matching circuit M1 includes a switch SW0, and thus, the switch SW0 may also be referred to as a power saving connection with the main branch.

Specifically, referring to fig. 2, in the related embodiment, the first matching circuit M1 includes a matching sub-circuit 13a, a matching sub-circuit 13b, and a switch SW0. The first feed S1 is electrically connected to the first feed point P1 through the matching sub-circuit 13 a. The switch SW0 is connected in series with the matching sub-circuit 13b to form a series unit 13c. One end of the series unit 13c is electrically connected to the first feeding point P1, and the other end of the series unit 13c is grounded. In the schematic diagram of the present embodiment, one end of the switch SW0 is used as the one end of the series unit 13c to be electrically connected to the first feeding point P1; the other end of the switch SW0 is electrically connected to one end of the matching sub-circuit 13b, and the other end of the matching sub-circuit 13b serves as the other end of the series unit 13c to be grounded. In other embodiments, one end of the matching sub-circuit 13b is used as the one end of the series unit 13c to be electrically connected to the first feeding point P1, the other end of the matching sub-circuit 13b is electrically connected to one end of the switch SW0, and the other end of the switch SW0 is used as the other end of the series unit 13c to be grounded.

As can be seen, in the related art antenna assembly 10, the switch SW0 of the first matching circuit M1 is electrically connected to the first radiator 110 (i.e. the main branch), and when the switch SW0 is in the off state, the antenna assembly 10 is operated in the second frequency band of cellular communication, the EE dual mode covers the first sub-band and the second sub-band (for example, the B3 frequency band+b41 frequency band) of the second frequency band. When the antenna assembly 10 needs to operate in the first frequency band for satellite communication, the switch SW0 is turned on, and the first sub-band supported by the mode three of the antenna assembly 10 is switched to the first frequency band (e.g. 2.1 GHz) supported by the mode one of the antenna assembly 10 for satellite communication.

It can be seen that, since the switch SW0 is in the on state when the antenna assembly 10 is operated in the first frequency band for satellite communication, the switch SW0 can be electrically connected to the ground, so that the switch SW0 of the antenna assembly 10 in the related art has no risk of voltage over-voltage. If the switch SW0 is in an off state when the antenna assembly 10 is operating in the first frequency band for satellite communication, there is a risk of voltage over-voltage on the switch SW 0.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating S11 and efficiency simulation of the antenna assembly shown in fig. 1. In the present schematic, the abscissa is Frequency (Frequency) in GHz; the ordinate is in dB. In the present schematic diagram, the curve (1) is an S11 curve when the antenna assembly 10 supports the first frequency band; curve (2) is a System radiation efficiency (System rad. Efficiency) curve when the antenna assembly 10 supports the first frequency band; curve (3) is a System total efficiency (System to. Efficiency) curve when the antenna assembly 10 supports the first frequency band. As can be seen from the present schematic diagram, the first frequency band supported by the antenna assembly 10 is 2.0 GHz-2.2 GHz, and has better system radiation efficiency and overall system efficiency. Curve (4) is an S11 curve of the antenna assembly 10 when operating in the second frequency band; curve (5) is a System radiation efficiency (System rad. Efficiency) curve of the antenna assembly 10 when operating in the second frequency band; curve (6) is a System total efficiency (System to. Efficiency) curve of the antenna assembly 10 when operating in the second frequency band. As can be seen from the present schematic diagram, the second frequency band supported by the antenna assembly 10 includes a B3 frequency band and a B41 frequency band, and has better system radiation efficiency and overall system efficiency.

Referring to fig. 8 and fig. 9 together, fig. 8 is a diagram illustrating the antenna assembly shown in fig. 1 when operating in a transmitting band of a first frequency band; fig. 9 is a diagram illustrating the antenna assembly of fig. 1 operating in a receive band of a first frequency band. In fig. 8, the simulation is performed by taking the example that the related art antenna assembly 10 supports the transmission sub-band (Tx) of the first frequency band as 2.0GHz, and in fig. 9, the simulation is performed by taking the example that the related art antenna assembly 10 operates in the reception sub-band (Rx) of the first frequency band as 2.2 GHz. As can be seen from the two simulation diagrams of fig. 8 and 9, the antenna assembly 10 operates in the transmitting sub-band of the first frequency band and the receiving sub-band of the first frequency band, and the directivity diagram faces upward right (the view of the drawing).

The antenna assembly 10 provided in the embodiments of the present application will be described in detail.

Referring to fig. 10, 11 and 12 together, fig. 10 is a schematic diagram of an antenna assembly according to a first embodiment of the present application; FIG. 11 is a schematic diagram of the second matching circuit of FIG. 10; fig. 12 is a schematic diagram of a current mode of the antenna assembly of fig. 10 when operating in a first frequency band. Embodiments of the present application provide an antenna assembly 10. The antenna assembly 10 includes a first radiator 110, a first matching circuit M1, a first feed source S1, a second radiator 120, and a second matching circuit M2. The first radiator 110 includes a first radiating portion 111. The first radiating portion 111 includes a first end 1111, a first feeding point P1, and a second end 1112, and the first end 1111 is grounded. The first feed source S1 is electrically connected to the first matching circuit M1 to the first feeding point P1, and the first feed source S1 is configured to feed an excitation signal to the first radiator 110 in a first frequency band supporting satellite communication or a second frequency band supporting cellular communication. The second radiator 120 includes a third end 121, a first connection point P3, and a fourth end 122, where the third end 121 is opposite to the second end 1112 and spaced apart to form a coupling slot 120a. The second matching circuit M2 includes a first matching sub-circuit 131, and one end of the first matching sub-circuit 131 is electrically connected to the first connection point P3, and the other end is grounded. The first matching sub-circuit 131 includes a first switch 1311 and a first matching branch 1312 connected in series. When the antenna assembly 10 operates in the first frequency band, the first switch 1311 is turned on to ground the third terminal 121 of the second radiator 120 through the first matching sub-circuit 131. When the antenna assembly 10 is operating in the second frequency band, the first switch 1311 is turned off.

The first radiator 110 may be a laser direct structuring (Laser Direct Structuring, LDS) radiator, or a flexible circuit board (Flexible Printed Circuit, FPC) radiator, or a printed direct structuring (Print Direct Structuring, PDS) radiator, or a metal stub radiator. When the antenna assembly 10 is applied to the electronic device 1 (see fig. 41 to 43), the first radiator 110 may be a structural antenna (Mechanical DesignAntenna, MDA) radiator designed by using the metal of the insert of the electronic device 1 itself. For example, the first radiator 110 may be an antenna radiator designed by using a middle frame 30 formed by plastic and metal of the electronic device 1. In addition, the first radiator 110 may be a metal frame antenna radiator designed for the metal middle frame 30.

It is understood that the shape, structure and material of the first radiator 110 are not particularly limited, and the shape of the first radiator 110 includes, but is not limited to, a bent shape, a straight shape, an L shape, a sheet shape, a rod shape, a coating, a film, etc. When the first radiator 110 is in a strip shape, the extending track of the first radiator 110 is not limited in the present application, so the first radiator 110 can be in a linear, curved, multi-section bending track extension. The first radiator 110 may have a line with a uniform width on the extended track, or may have an irregular shape with a gradual width change and a widened region. In the schematic view of the present embodiment, the first radiator 110 extends along a straight line track, and it should be understood that the first radiator 110 shown in the schematic view of the present embodiment should not be construed as limiting the first radiator 110 provided in the present embodiment.

In one embodiment, the first end 1111 may be electrically connected to the floor 40 (also referred to as a ground pole, or a ground system, or a system ground) through a grounding structure such as a conductive spring, a conductive connecting rib (e.g., a metal connecting rib), or a pin-pin connector (POP-pin), etc. to be grounded. When the antenna assembly 10 is applied to the electronic device 1, the ground electrode may be, but is not limited to, the frame body 310 of the middle frame 30 in the electronic device 1 (see fig. 41 to 43), or the ground in a circuit board, or a shielding member of the display screen 70, or a conductive battery cover, etc. In another embodiment, when the antenna assembly 10 is applied to the electronic device 1 and the first radiator 110 is an MDA radiator or a metal frame antenna radiator, the grounding of the first end 1111 is described in detail below. The electronic device 1 comprises a middle frame 30. The middle frame 30 includes a frame body 310 and a frame 320. The frame body 310 may be used as a ground electrode, and the frame 320 is enclosed on the periphery of the frame body 310 and connected to the frame body 310. The first radiator 110 is formed on the frame 320, and the first end 1111 of the first radiator 110 is connected to the frame body 310 for grounding.

In the present embodiment, the first radiator 110 and the second radiator 120 are both disposed on the top of the floor 40 of the electronic device 1 to which the antenna assembly 10 is applied.

The first feed source S1 and the first matching circuit M1 may be located on a circuit board. The first feed source S1 is used for generating a first excitation signal. The first excitation signal is used to excite the first radiator 110 and the second radiator 120 to support a first frequency band for satellite communication. In an embodiment, the frequency range of the first frequency band may be, but is not limited to, 2.0GHz to 2.2GHz. The first feed source S1 is also used for generating a second excitation signal. The second excitation signal is used to excite a second frequency band in which the first radiator 110 and the second radiator 120 support cellular communication. The first feed source S1 may be electrically connected to the first feed point P1 by, but not limited to, a conductive spring, a conductive connecting rib (such as a metal connecting rib), or an electrical conductive element such as a pin-in-pin connector (POP-pin), etc. which is connected to the first feed point P1.

The second radiator 120 may be a laser direct structuring (Laser Direct Structuring, LDS) radiator, or a flexible circuit board (Flexible Printed Circuit, FPC) radiator, or a printed direct structuring (Print Direct Structuring, PDS) radiator, or a metal stub radiator. When the antenna assembly 10 is applied to the electronic device 1, the second radiator 120 may be a structural antenna (Mechanical DesignAntenna, MDA) radiator designed by using the metal of the electronic device 1 itself. For example, the second radiator 120 may be an antenna radiator designed by using a middle frame 30 formed by plastic and metal of the electronic device 1. In addition, the second radiator 120 may be a metal frame antenna radiator designed for the metal middle frame 30.

It is understood that the shape, structure and material of the second radiator 120 are not particularly limited in this application, and the shape of the second radiator 120 includes, but is not limited to, a bent shape, a straight shape, an L shape, a sheet shape, a rod shape, a coating, a film, etc. When the second radiator 120 is in a strip shape, the extending track of the second radiator 120 is not limited in the present application, so the second radiator 120 can be in a linear, curved, multi-section bending track extension. The second radiator 120 may be a line with a uniform width on the extending track, or may be an irregular shape with a gradual width change and a widened region. In the schematic diagram of the present embodiment, the second radiator 120 includes two portions that are connected by bending, which is taken as an example, and it should be understood that the second radiator 120 shown in the schematic diagram of the present embodiment should not be construed as limiting the second radiator 120 provided in the present embodiment.

The third end 121 is opposite to the second end 1112 and spaced apart to form a coupling slit 120a, and the second radiator 120 may be coupled with the first radiator 110 through the coupling slit 120 a.

In this embodiment, the first radiator 110 is also referred to as a main radiator or a main branch. The second radiator 120 is also referred to as a parasitic radiator or a parasitic stub.

The second matching circuit M2 may be located on a circuit board, and one end of the second matching circuit M2 may be connected to the third end 121 through a conductive elastic sheet, or a conductive connecting rib (such as a metal connecting rib), or a pin connector (POP-pin), etc. The second matching circuit M2 may be connected to the ground electrode by a conductive spring, a conductive connecting rib (such as a metal connecting rib), a thimble connector (POP-pin), or the like.

The fourth terminal 122 may be electrically grounded by, but not limited to, a conductive spring, a conductive connecting bar (such as a metal connecting bar), a pin connector (POP-pin), or the like.

In the present embodiment, one end of the first matching branch 1312 is electrically connected to the first connection point P3 as the one end of the first matching sub-circuit 131, and the other end of the first matching branch 1312 is electrically connected to one end of the first switch 1311; the other end of the first switch 1311 is electrically grounded as the other end of the first matching sub-circuit 131.

It will be appreciated that, in other embodiments, one end of the first switch 1311 is electrically connected to the first connection point P3 as the one end of the first matching sub-circuit 131, and the other end of the first switch 1311 is connected to one end of the first matching branch 1312; the other end of the first matching branch 1312 serves as the other end of the first matching sub-circuit 131 to be grounded.

When the first switch 1311 is turned on, one end of the first switch 1311 is electrically connected to the other end of the first switch 1311, and thus, the third end 121 of the second radiator 120 is grounded through the first matching sub-circuit 131.

Specifically, referring to fig. 11, the first switch 1311 includes a first connection end 131a and a second connection end 131b. The first connection end 131a is electrically connected to the first matching branch 1312 and is electrically connected to the first connection point P3, the second connection end 131b is electrically connected to a ground (in this embodiment, the floor 40), and when the first connection end 131a is electrically connected to the second connection end 131b, the first switch 1311 is turned on.

When the first connection terminal 131a is electrically connected to the second connection terminal 131b, the first switch 1311 is turned on, and the first connection point P3 of the second radiator 120 may be electrically connected to the ground through the first switch 1311 in the first matching sub-circuit 131. When the first connection end 131a and the second connection end 131b are electrically disconnected, the first switch 1311 is turned off, and the first connection point P3 of the second radiator 120 and the ground pole cannot be grounded through the first matching sub-circuit 131.

In this embodiment, the first switch 1311 is simple in structure and easy to implement, so that when the antenna assembly 10 supports the first frequency band, the first switch 1311 is controlled, so that the first switch 1311 is turned on to ground the third end 121 of the second radiator 120 through the first matching sub-circuit 131.

In an embodiment, the first matching branch 1312 includes a short-circuit line; or an inductance, wherein the inductance value of the inductance is less than or equal to 5nH.

In this embodiment, when the first matching branch 1312 includes an inductance, the inductance value of the inductance is small, and in general, the inductance value of the inductance is less than or equal to 5nH. Whether the first matching branch 1312 includes a shorting line or an inductance with an inductance value less than or equal to 5nH, the impedance value of the first matching branch 1312 is small, and the antenna assembly 10 supports less loss in the first frequency band when the first switch 1311 is turned on.

In summary, in the antenna assembly 10 provided in the embodiment of the present application, since the coupling slot 120a is formed between the third end 121 of the second radiator 120 and the second end 1112 of the first radiator 110, the second radiator 120 can couple (also referred to as EE coupling) the energy of the first radiator 110 through the electric field of the coupling slot 120 a. When the second radiator 120 couples the energy of the first radiator 110 through the coupling slot 120a by electric field coupling, a part of the energy is radiated to the free space, and a part of the energy is coupled to the second radiator 120. Accordingly, the energy coupled to the second radiator 120 is attenuated compared to the energy of the first radiator 110, and thus, the voltage received by the first switch 1311 in the first matching sub-circuit 131 in the second matching circuit M2 is reduced. On the other hand, when the first switch 1311 is turned on, the third end 121 of the second radiator 120 is grounded through the first matching sub-circuit 131 in the second matching circuit M2, and therefore, a portion between the first connection point P3 and the fourth end 122 in the second radiator 120 is shorted. Since the dimension from the first connection point P3 to the coupling slot 120a is smaller than the dimension of the second radiator 120, the main current when the antenna assembly 10 supports the first frequency band is substantially concentrated on the first radiator 110, but not on the second radiator 120, so that the voltage borne by the first switch 1311 in the first matching sub-circuit 131 is also reduced. For the two reasons described above, when the antenna assembly 10 is operating in the first frequency band for satellite communications, the voltage experienced by the first switch 1311 is lower, thereby reducing or even eliminating the risk of the first switch 1311 being burned out.

With continued reference to fig. 12, when the antenna assembly 10 supports the first frequency band, the antenna assembly 10 has a first resonant mode. The first resonant mode includes a quarter wavelength mode of the first end 1111 to the second end 1112, and a current having the same flow direction as the current of the first end 1111 to the second end 1112 is formed at the third end 121 to the first connection point P3.

In the present embodiment, the current corresponding to the quarter-wavelength mode from the first end 1111 to the second end 1112 is denoted as the current I ₁₁ The current from the third terminal 121 to the first connection point P3 is denoted as current I ₁₂ It can be seen that the current I ₁₂ And the current I ₁₁ Is the same. The first resonant mode is also referred to as a radiation mode, as is known from the distribution of current over the first radiator 110 and the second radiator 120.

In the schematic diagram of the present embodiment, the current flow direction of the antenna assembly 10 in the current half-wavelength period is taken as an example for illustration, and it is understood that, in the next half-wavelength period, the current flow direction of the first radiator 110 is reversed, and the current flow direction of the second radiator 120 is reversed. For example, in the current half-wavelength period, the current I ₁₁ From the first end 1111 to the second end 1112, and the current I ₁₂ From the third end 121 to the first connection point P3; in the next half wavelength period, the current distribution of the antenna assembly 10 is: from the first connection point P3 to the third end 121 and from the second end 1112 to the first end 1111.

The "the first resonant mode includes a quarter wavelength mode from the first end 1111 to the second end 1112" refers to a wavelength corresponding to a center frequency point of a first frequency band supported by the first resonant mode.

The quarter wavelength mode is also referred to as a fundamental mode, and the antenna assembly 10 has the first resonant mode when supporting the first frequency band, and the first resonant mode includes the fundamental mode of the first radiator 110, so that the antenna assembly 10 has higher efficiency when supporting the first frequency band.

Referring to fig. 13, fig. 13 is a schematic diagram illustrating current intensity when the antenna assembly of fig. 10 operates in a first frequency band. The first resonant mode generates a first resonant current and a second resonant current. Wherein the first resonant current is distributed from the first end 1111 to the second end 1112. The second resonant current is distributed from the third terminal 121 to the first connection point P3 and is grounded from the first matching sub-circuit 131. Wherein, the current intensity J1 of the first resonance current and the current intensity J2 of the second resonance current satisfy: j2 < J1.

As can be seen from the foregoing description, the first resonant current I ₁₁ The current intensity of the second resonance current I is J1 ₁₂ Is J2. Since J2 < J1, the first resonant current I ₁₁ Marked as solid line, the second resonant current I ₁₂ Marked as a dashed line.

In the antenna assembly 10 provided in this embodiment of the present application, since the coupling slot 120a is formed between the third end 121 of the second radiator 120 and the second end 1112 of the first radiator 110, the second radiator 120 can couple (also referred to as EE coupling) the energy of the first radiator 110 through the electric field of the coupling slot 120 a. When the second radiator 120 couples the energy of the first radiator 110 through the coupling slot 120a by electric field coupling, a part of the energy is radiated to the free space, and a part of the energy is coupled to the second radiator 120. Therefore, the energy coupled to the second radiator 120 is attenuated compared to the energy of the first radiator 110, i.e., J2 < J1, and thus the voltage received by the first switch 1311 in the first matching sub-circuit 131 is reduced. Thus, when the antenna assembly 10 is operating in a first frequency band for satellite communications, the voltage experienced by the first switch 1311 is lower, thereby reducing or even eliminating the risk of the first switch 1311 being burned out.

Referring to fig. 14, 15 and 16, fig. 14 (a) is a schematic diagram of an antenna assembly according to another embodiment of the present application; fig. 14 (b) is a schematic diagram of the second matching circuit in fig. 14 (a); fig. 15 is a schematic diagram of a current distribution when the antenna assembly of fig. 14 (a) is operated in a transmitting sub-band of a first frequency band; fig. 16 is a schematic diagram of a current distribution when the antenna assembly of fig. 14 (a) is operated in a receiving sub-band of the first frequency band. The antenna assembly 10 includes a first radiator 110, a first matching circuit M1, a first feed source S1, a second radiator 120, and a second matching circuit M2. The first radiator 110 includes a first radiating portion 111. The first radiating portion 111 includes a first end 1111, a first feeding point P1, and a second end 1112, and the first end 1111 is grounded. The first feed source S1 is electrically connected to the first matching circuit M1 to the first feed point P1, and the first feed source S1 is used for supporting a first frequency band of satellite communication or a second frequency band of cellular communication. The second radiator 120 includes a third end 121, a first connection point P3, and a fourth end 122, where the third end 121 is opposite to the second end 1112 and spaced apart to form a coupling slot 120a. The second matching circuit M2 includes a first matching sub-circuit 131, and one end of the first matching sub-circuit 131 is electrically connected to the first connection point P3, and the other end is grounded. The first matching sub-circuit 131 includes a first switch 1311 and a first matching branch 1312 connected in series. When the antenna assembly 10 supports the first frequency band, the first switch 1311 is turned on to ground the third terminal 121 of the second radiator 120 through the first matching sub-circuit 131.

The first radiator 110, the second radiator 120, the first matching circuit M1, the second matching circuit M2, etc. refer to the foregoing descriptions, and are not repeated here.

Further, the first frequency band includes a transmit sub-band and a receive sub-band. Referring to fig. 14 (a) and (b), the second matching circuit M2 further includes a second matching sub-circuit 132. One end of the second matching sub-circuit 132 is electrically connected to the first connection point P3, and the other end is grounded, and the second matching sub-circuit 132 includes a second switch 1321 and a second matching branch 1322 connected in series. When the antenna assembly 10 is operating in the transmit sub-band of the first frequency band, the first switch 1311 is turned on and the second switch 1321 is turned off; when the antenna assembly 10 supports the receive sub-band of the first band, the first switch 1311 is on and the second switch 1321 is on.

The center frequency point of the transmitting sub-frequency band of the first frequency band is smaller than the center frequency point of the receiving sub-frequency band of the first frequency band. For example, when the range of the first frequency band is 2.0 GHz-2.2 GHz, the center frequency point of the transmitting sub-band of the first frequency band may be 2.0GHz, and the receiving sub-band (Rx) of the first frequency band may be 2.2GHz.

In this embodiment, the second matching sub-circuit 132 is connected in parallel with the first matching sub-circuit 131. Referring to fig. 15, when the first switch 1311 is turned on and the second switch 1321 is turned off, the antenna assembly 10 supports the current in the transmitting sub-band of the first band from the first connection point P3 of the second radiator 120 to the ground of the first matching sub-circuit 131. Referring to fig. 16, when the first switch 1311 is turned on and the second switch 1321 is turned on, a portion of the current in the antenna assembly 10 supporting the receiving sub-band of the first band passes through the first connection point P3 of the second radiator 120 to the ground under the first matching sub-circuit 131; another part of the current passes through the first connection point P3 of the second radiator 120 to the ground of the second matching sub-circuit 132.

It can be seen that the second matching circuit M2 includes the first matching sub-circuit 131 and the second matching sub-circuit 132, and the antenna assembly 10 can support the transmitting sub-band and the receiving sub-band of the first frequency band and can switch between the transmitting sub-band and the receiving sub-band of the first frequency band by controlling the first switch 1311 in the first matching sub-circuit 131 and controlling the second switch 1321 in the second matching sub-circuit 132. It can be seen that the antenna assembly 10 provided in the embodiments of the present application can implement a transmitting sub-band and a receiving sub-band of a first frequency band for communication with a satellite.

In addition, in the antenna assembly 10 provided in the embodiment of the present application, since the coupling slot 120a is formed between the third end 121 of the second radiator 120 and the second end 1112 of the first radiator 110, the second radiator 120 can couple (also referred to as EE coupling) energy of the first radiator 110 through an electric field of the coupling slot 120 a. When the second radiator 120 couples the energy of the first radiator 110 through the coupling slot 120a by electric field coupling, a part of the energy is radiated to the free space, and a part of the energy is coupled to the second radiator 120. Therefore, the energy coupled to the second radiator 120 is attenuated compared to the energy of the first radiator 110, and thus the voltage applied to the first switch 1311 in the first matching sub-circuit 131 and the second switch 1321 in the second matching sub-circuit 132 is reduced. On the other hand, when the first switch 1311 of the first matching sub-circuit 131 in the second matching circuit M2 is turned on, the third terminal 121 of the second radiator 120 is grounded through the first matching sub-circuit 131, and thus, a portion between the first connection point P3 and the fourth terminal 122 in the second radiator 120 is shorted. Since the dimension from the first connection point P3 to the coupling slot 120a is smaller than the dimension of the second radiator 120, the main current when the antenna assembly 10 supports the first frequency band is substantially concentrated on the first radiator 110, but not on the second radiator 120, so that the voltage borne by the first switch 1311 in the first matching sub-circuit 131 is also reduced. In addition, when the second switch 1321 of the second matching sub-circuit 132 in the second matching circuit M2 is turned on, the third terminal 121 of the second radiator 120 is also grounded through the second matching sub-circuit 132, and thus, a portion between the first connection point P3 and the fourth terminal 122 in the second radiator 120 is shorted. Since the dimension from the first connection point P3 to the coupling slot 120a is smaller than the dimension of the second radiator 120, the main current when the antenna assembly 10 supports the first frequency band is substantially concentrated on the first radiator 110 instead of the second radiator 120, and thus the voltage borne by the second switch 1321 in the second matching sub-circuit 132 is also reduced. In addition, when the first switch 1311 of the first matching sub-circuit 131 in the second matching circuit M2 is turned on, and when the second switch 1321 of the second matching sub-circuit 132 in the second matching circuit M2 is turned on, the third terminal 121 may be electrically connected to the ground through two paths of the first matching sub-circuit 131 and the second matching sub-circuit 132. Compared to the third terminal 121 conducting one path to ground (e.g., only conducting the first matching sub-circuit 131), the current flowing from the third terminal 121 to ground is divided into two paths, namely the first matching sub-circuit 131 and the second matching sub-circuit 132, and the voltage applied to the switch on each path is further reduced, thereby further reducing the risk of burning out the first switch 1311 and the second switch 1321. In addition, compared to the third terminal 121 to the ground, the current flowing through the third terminal 121 to the ground is divided into the first matching sub-circuit 131 and the second matching sub-circuit 132, which have lower losses, which are about one half or one half of that of a single path.

Referring to fig. 17, fig. 17 is a schematic diagram of a second matching circuit according to an embodiment of the present application. The second switch 1321 includes a third connection terminal 132a and a fourth connection terminal 132b. The third connection end 132a is electrically connected to the second matching branch 1322 to the first connection point P3, and the fourth connection end 132b is electrically connected to a ground pole (here, the floor 40). When the third connection terminal 132a is electrically connected to the fourth connection terminal 132b, the second switch 1321 is turned on; when the third connection terminal 132a is electrically disconnected from the fourth connection terminal 132b, the second switch 1321 is turned off.

When the third connection terminal 132a is electrically connected to the fourth connection terminal 132b, the second switch 1321 is turned on, and the first connection point P3 of the second radiator 120 may be electrically connected to the ground through the second switch 1321 in the second matching sub-circuit 132. When the third connection end 132a and the fourth connection end 132b are electrically disconnected, the second switch 1321 is turned off, and the connection point P3 of the second radiator 120 and the ground cannot be grounded through the second matching sub-circuit 132. In this embodiment, the second switch 1321 has a simple structure and is easy to implement.

Further, in an embodiment, the second matching branch 1322 includes a short-circuit line; or an inductance, wherein the inductance value of the inductance is less than or equal to 5nH.

In this embodiment, when the second matching branch 1322 includes an inductor, the inductance value of the inductor is smaller, and in general, the inductance value of the inductor is smaller than or equal to 5nH. Whether the second matching branch 1322 includes a shorting line or an inductance with an inductance value less than or equal to 5nH, the impedance value of the second matching branch 1322 is smaller, and when the second switch 1321 is turned on, the antenna assembly 10 supports that the loss of the first frequency band is smaller.

The performance of the antenna assembly 10 provided in the embodiment of the present application will be simulated and described with reference to simulation diagrams.

Referring to fig. 18, fig. 18 is a simulation diagram of voltage variation with frequency of the first switch and the second switch of the antenna assembly in fig. 14. In the simulation diagram, the abscissa is Frequency (Frequency) in GHz; the ordinate is Voltage in Voltage (Voltage) and V. In the simulation, it can be seen that the voltage born by the antenna assembly 10 in the first frequency band (2.0 GHz-2.2 GHz) is less than 40V, so that there is no risk of burning out caused by the over-voltage of both the first switch 1311 and the second switch 1321.

Referring to fig. 19, fig. 19 is a schematic diagram illustrating S11 and efficiency simulation of the antenna assembly shown in fig. 10. In the present schematic, the abscissa is Frequency (Frequency) in GHz; the ordinate is in dB. In the present schematic diagram, the curve (1) is an S-parameter curve of the transmission sub-band (Tx) of the first band; curve (2) is a System radiation efficiency (System rad. Efficiency) curve when the antenna assembly 10 supports the transmit sub-band of the first frequency band; curve (3) is a System total efficiency (System to. Efficiency) curve for the antenna assembly 10 supporting the transmit sub-band of the first frequency band.

As can be seen from the curves (1), (2) and (3), the antenna assembly 10 has relatively good system radiation efficiency and overall system efficiency when operating in the transmitting sub-band of the first frequency band.

Curve (4) is an S-parameter curve of a receiving sub-band (Tx) of the first band; curve (5) is a System radiation efficiency (System rad. Efficiency) curve when the antenna assembly 10 supports the receive sub-band of the first frequency band; curve (6) is a System total efficiency (System to. Efficiency) curve for the antenna assembly 10 supporting the receive sub-band of the first frequency band.

As can be seen from the curves (4), (5) and (6), the antenna assembly 10 has relatively good system radiation efficiency and overall system efficiency when operating in the receiving sub-band of the first frequency band.

The curve (7) is an S parameter curve of the second frequency band; curve (8) is a System radiation efficiency (System rad. Efficiency) curve at the time of receiving sub-band of the second frequency band supported by the antenna assembly 10; the curve (9) is a System total efficiency (System to. Efficiency) curve of the second frequency band supported by the antenna assembly 10.

As can be seen from the curves (7), (8) and (9), the antenna assembly 10 has relatively good system radiation efficiency and overall system efficiency when supporting the second frequency band.

Referring to fig. 20 and 21, fig. 20 is a diagram illustrating the antenna assembly of fig. 14 operating in a transmit sub-band of a first frequency band; fig. 21 is a diagram of the antenna assembly of fig. 14 operating in a receive sub-band of the first frequency band. As can be seen from fig. 20 and 21, the antenna assembly 10 has good directivity of the directivity pattern and a high upper hemispherical duty cycle when supporting the transmitting sub-band and the receiving sub-band of the first band for communication with satellites. Therefore, the antenna assembly 10 provided in the embodiment of the present application has a better communication effect when the transmitting sub-band and the receiving sub-band of the first frequency band are used to communicate with the satellite.

When the antenna assembly 10 operates in the second frequency band, the second matching circuit M2 is disconnected from the ground (here, the ground 40).

When the antenna assembly 10 operates in the second frequency band, the second matching circuit M2 is disconnected from the ground, so that the antenna assembly 10 can use not only the first radiator 110 but also the second radiator 120 when operating in the second frequency band. According to the antenna assembly 10 provided in the embodiment of the present application, the electrical connection relationship between the second matching circuit M2 and the ground electrode can be utilized to support more frequency bands (i.e., the second frequency band is supported in addition to the first frequency band), so that the antenna assembly 10 has better communication performance.

When the second matching circuit M2 includes the first matching sub-circuit 131 and does not include the second matching sub-circuit 132, the second matching circuit M2 is disconnected from the ground, and includes: the first switch 1311 of the first matching sub-circuit 131 is disconnected from the ground; in other words, the first switch 1311 of the first matching sub-circuit 131 is in an off state.

When the second matching circuit M2 includes the first matching sub-circuit 131 and includes the second matching sub-circuit 132, the second matching circuit M2 is disconnected from the ground, and includes: the first switch 1311 of the first matching sub-circuit 131 is disconnected from the ground, and the second matching sub-circuit 132 is disconnected from the ground; in other words, the first switch 1311 of the first matching sub-circuit 131 is in an off state, and the second switch 1321 of the first matching sub-circuit 131 is in an off state.

The second frequency band includes a first sub-band and a second sub-band. The antenna assembly 10 has a second resonant mode and a three resonant mode, wherein the second resonant mode supports the first sub-band and the second resonant mode supports the second sub-band.

When the antenna assembly 10 supports the second frequency band of cellular communication, the second frequency band includes the first sub-frequency band and the second sub-frequency band, so that the antenna assembly 10 has a better communication effect when working in the second frequency band.

Referring to fig. 22 and 23, fig. 22 is a schematic diagram illustrating a current distribution of a second resonant mode of the antenna assembly provided in fig. 10; fig. 23 is a schematic diagram of a current distribution of a third resonant mode of the antenna assembly provided in fig. 10. The second resonant mode includes a quarter wavelength mode of the first end 1111 to the second end 1112, and the same current flow direction as the current flow of the first end 1111 to the second end 1112 is formed at the third end 121 to the fourth end 122. The third resonant mode includes a quarter wavelength mode of the first end 1111 to the second end 1112, and a current flow opposite to a current flow of the first end 1111 to the second end 1112 is formed at the third end 121 to the fourth end 122.

As can be seen in fig. 22, the second resonant mode comprises a quarter wavelength mode of the first end 1111 to the second end 1112, accompanied by a current of the third end 121 to the fourth end 122. Specifically, the current on the first 1111 to the second 1112 is labeled I ₁₃ The current from the third terminal 121 to the fourth terminal 122 is denoted as I ₁₄ Wherein the current I ₁₄ Flow direction and current I of (2) ₁₃ Is the same. In other words, the current of the first radiator 110 is I ₁₃ The current of the second radiator 120 is I ₁₄ Wherein the current I ₁₄ Flow direction and current I of (2) ₁₃ Is the same. From the current distribution of the second resonant mode, the second resonant mode is also referred to as the radiating mode.

As can be seen in fig. 23, the third resonant mode comprises a quarter wavelength mode of the first end 1111 to the second end 1112, accompanied by a current of the third end 121 to the fourth end 122. Specifically, in the third resonant mode, the current on the first 1111 to the second 1112 ends is labeled I ₁₅ The current from the third terminal 121 to the fourth terminal 122 is denoted as I ₁₆ Wherein the current I ₁₆ Flow direction and current I of (2) ₁₅ Is opposite to the flow direction of the flow. In other words, the current of the first radiator 110 is I ₁₅ The current of the second radiator 120 is I ₁₆ Wherein the current I ₁₆ And current I ₁₅ Is opposite to the direction of the (c). From the current distribution of the third resonant mode, the third resonant mode is also referred to as balanced mode. The second resonant mode and the third resonant mode are also referred to as EE dual mode.

In one embodiment, the second frequency band includes a first sub-band and a second sub-band. Wherein the first sub-band is supported by the second resonant mode and the second sub-band is supported by the third resonant mode. In an embodiment, the first sub-band is a B3 band, and the second sub-band is a B41 band.

In the antenna assembly 10 provided in this embodiment, the first sub-band is a B3 band, and the second sub-band is a B41 band, so as to meet the communication requirements of the B3 band and the B41 band of the antenna assembly 10 during cellular communication.

Next, the performance of the antenna assembly 10 provided in the embodiment of the present application compared to the performance of the antenna assembly 10 provided in the related art described above will be analyzed and described.

In the antenna assembly 10 provided in the related art, the first matching circuit M1 electrically connected to the first radiator 110 includes a switch, and the frequency band supported by the antenna assembly 10 is switched by using the switch. In the antenna assembly 10 provided in the embodiment of the present application, the second matching circuit M2 electrically connected to the second radiator 120 includes a switch (i.e., the first switch 1311, or the first switch 1311 and the second switch 1321), and the frequency band supported by the antenna assembly 10 is switched by the switch in the second matching circuit M2.

In the antenna assembly 10 provided in the related art and the antenna assembly 10 provided in the embodiment of the present application, the mode when supporting the second frequency band of cellular communication is the same. When the second frequency band includes the B1 frequency band+b41 frequency band, the antenna assembly 10 provided in the related art and the antenna assembly 10 provided in the embodiment of the present application support the same mode of the B1 frequency band+b41 frequency band.

The difference is that: the antenna assembly 10 provided in the related art and the antenna assembly 10 provided in the embodiments of the present application have different current paths when supporting the first frequency band for communication with the satellite.

Specifically, in the antenna assembly 10 provided in the related art, the current is distributed between the first end 1111 to the second end 1112, and the third end 121 to the fourth end 122, that is, the current is distributed on the first radiator 110 and the second radiator 120. In general, in the related art antenna assembly 10, the lengths of the first radiator 110 (also referred to as a main branch) and the second radiator 120 (also referred to as a parasitic branch) are equal or are relatively close. Therefore, in the related art antenna assembly 10, the current of the first radiator 110 and the current of the second radiator 120 are relatively close.

In the antenna assembly 10 provided in the present embodiment, as can be seen from the foregoing description, the current when the antenna assembly 10 supports the first frequency band for satellite communication is mainly concentrated on the first radiator 110, so that the risk of burning out the switch in the second matching circuit M2 can be further reduced or even eliminated.

In the Antenna assembly 10 provided in the embodiment of the present application, the first radiator 110 is an Inverted-F Antenna (IFA) radiator. The second radiator 120 includes two radiating portions connected in a bent manner, i.e., shaped like an L, and thus, the second radiator 120 is also called an L-shaped radiator, or an L-branch. The antenna assembly 10 provided in this embodiment of the present application is equivalent to adding the second radiator 120 as a parasitic stub on the basis of the IFA radiator.

Referring to fig. 24, fig. 24 is a schematic diagram of an antenna assembly of an IFA antenna according to the related art. The antenna assembly 10 includes a radiator 170, a matching circuit M0, and a feed source S0. The radiator 170 includes a first end 171, a feeding point P0, and a second end 172. The first end 171 is grounded, and the second end 172 is a free end. The feed source S0 electrically connects the matching circuit M0 to the feed point P0. In this schematic drawing, the radiator 170 is illustrated as being disposed on top of the floor 40 of the electronic device 1 to which the antenna assembly 10 is applied.

Referring to fig. 25, fig. 25 is a diagram of the antenna assembly provided in fig. 24. The radiation of the IFA antenna is mainly dependent on the radiation of the floor 40 (such as the main ground of the PCB), while along the floor 40 the pattern is directed from the phase lead to the phase lag direction, and when the IFA antenna is located at the upper part of the floor 40, the lower part of the floor 40 is the phase lag position, so that the antenna assembly 10 supports the pattern in the second predetermined frequency band to be directed downwards.

The switch provided in the foregoing related art is located in the antenna assembly 10 of the first matching circuit M1, which is equivalent to adding the L-shaped second radiator 120 as a parasitic branch on the basis of the IFA antenna provided in fig. 24. The second radiator 120 of the related art antenna assembly 10 may have a downward component of the pattern. Referring specifically to fig. 26, fig. 26 is a schematic comparison diagram of the simulation of the antenna assembly provided in fig. 1 and 14. Wherein (a) of fig. 26 is a directional diagram of a transmitting sub-band of a first band of frequencies in which the antenna assembly 10 of fig. 1 supports communication with a satellite; fig. 26 (a') is a directional diagram of a transmit sub-band of the first frequency band of the antenna assembly 10 of fig. 14 supporting communication with a satellite; fig. 26 (b) is a directional diagram of a receiving sub-band of the first frequency band in which the antenna assembly 10 of fig. 1 supports communication with a satellite; fig. 26 (b') is a directional diagram of a receiving sub-band of the first band of frequencies in which the antenna assembly 10 of fig. 14 supports communication with satellites; fig. 26 (c) is a schematic diagram illustrating a current distribution of a first frequency band of the antenna assembly 10 in fig. 1 supporting communication with a satellite; fig. 26 (c') is a schematic diagram showing a current distribution of a first frequency band of the antenna assembly 10 in fig. 14 supporting communication with a satellite. As can be seen from the simulation, the upper hemisphere ratio when the antenna assembly 10 provided in the embodiment of the present application supports the first frequency band for communication with the satellite is significantly higher than that when the antenna assembly 10 provided in the related art supports the first frequency band for communication with the satellite.

Referring to fig. 27, fig. 27 is a simulation diagram of efficiency of the antenna assembly shown in fig. 1 and 14 operating in the first frequency band. In the present schematic, the abscissa is Frequency (Frequency) in GHz; the ordinate is in dB. In the present schematic diagram, curve (1) is an S11 curve when the antenna assembly 10 provided in fig. 14 (i.e., the antenna assembly 10 provided in the embodiment of the present application) supports the first frequency band; curve (2) is a System radiation efficiency (System rad. Efficiency) curve when the antenna assembly 10 provided in fig. 14 (i.e., the antenna assembly 10 provided in the embodiment of the present application) supports the first frequency band; curve (3) is a System total efficiency (System to. Efficiency) curve when the antenna assembly 10 provided in fig. 14 (i.e., the antenna assembly 10 provided in the embodiment of the present application) supports the first frequency band. Curve (4) is an S11 curve of the antenna assembly 10 provided in fig. 1 (i.e., the antenna assembly 10 provided in the related art) when operating in the second frequency band; curve (5) is a system radiation efficiency (systemrad. Efficiency) curve of the antenna assembly 10 (i.e., the antenna assembly 10 provided in the related art) provided in fig. 1 when the antenna assembly operates in the second frequency band; curve (6) is a System total efficiency (System to. Efficiency) curve of the antenna assembly 10 provided in fig. 1 (i.e., the antenna assembly 10 provided in the related art) operating in the second frequency band.

As can be seen from the simulation, the efficiency (i.e., the overall system efficiency) of the antenna assembly 10 provided in the related art is improved by about 0.8dB compared to the efficiency (i.e., the overall system efficiency) of the antenna assembly 10 provided in the embodiment of the present application due to the dual mode EE (see the point 3 of the curve (6) and the point 1 of the curve (3) in the simulation).

Referring to fig. 28 and 29 together, fig. 28 is a gain table of the antenna assembly shown in fig. 1 when operating in the first frequency band; fig. 29 is a gain table of the antenna assembly shown in fig. 14 when operating in the first frequency band. As can be seen from these two tables, the gain of the antenna assembly 10 (fig. 1) provided by the related art when operating in the first frequency band is improved by 0.3dBi compared to the gain of the antenna assembly 10 (fig. 14) provided by the embodiment of the present application. Since the gain=the directivity factor d=the efficiency η, the gain of the antenna assembly 10 (fig. 1) provided in the related art when operating in the first frequency band is improved by 0.3dBi compared to the gain of the antenna assembly 10 (fig. 14) provided in the embodiment of the present application, which indicates that the directivity factor of the antenna assembly 10 (fig. 1) provided in the related art when operating in the first frequency band is worse by 0.5dBi compared to the directivity factor of the antenna assembly 10 (fig. 14) provided in the embodiment of the present application. That is, the efficiency of the antenna assembly 10 provided by the related art is improved by 0.8dB, and the left-hand gain is improved by 0.3dB, because the gain is equal to the directivity coefficient multiplied by the efficiency, and the improvement in efficiency by 0.8dB smoothes the decrease in directivity coefficient by 0.5 dB. Therefore, compared with the antenna assembly 10 in the related art, the antenna assembly 10 provided in the embodiment of the present application has better directivity of the upper hemisphere.

In summary, in the antenna assembly 10 provided in the embodiment of the present application, the parasitic branch of the antenna assembly 10, that is, the switch of the second matching circuit M2 electrically connected to the second radiator 120 is utilized, so that the antenna assembly 10 has a better directivity coefficient and an upper hemispherical duty ratio when supporting the first frequency band. Furthermore, as can be seen from the foregoing, when the antenna assembly 10 is operating in the first frequency band for satellite communications, the voltage experienced by the first switch 1311 is lower, thereby reducing or even eliminating the risk of burning out the first switch 1311. When the antenna assembly 10 further comprises a second matching sub-circuit 132, the voltage to which the second switch 1321 is subjected is lower, thereby reducing or even eliminating the risk of burning out the second switch 1321. In addition, as can be seen from the schematic diagram of the current distribution of the foregoing antenna assembly 10, the antenna assembly 10 provided in the embodiment of the present application has no effect on the second frequency band supporting cellular communication.

Referring to fig. 30, fig. 30 is a schematic diagram illustrating a distance between a first connection point of the antenna assembly provided in fig. 14 and a coupling slot. Distance d from first connection point P3 to coupling slot 120a ₁ The method meets the following conditions: d is 0 to or less ₁ ≤d ₂ 2, wherein d ₂ Is the total length of the second radiator 120.

For example, d ₁ May be, but is not limited to, 0, d ₂ /10, or d ₂ /9, or d ₂ /8, or d ₂ /7, or d ₂ /6, or d ₂ /5, or d ₂ /4, or d ₂ 3, or d ₂ And/2, etc.

In the schematic diagram of the present embodiment, the second radiator 120 includes a third radiating portion 120b and a fourth radiating portion 120c that are connected by bending, the third radiating portion 120b has the third end 121, and the fourth radiating portion 120c has the fourth end 122. Total length d of the second radiator 120 ₂ Equal to the length d of the third radiating portion 120b ₃ Length d from the fourth radiation portion 120c ₄ Is the sum of the lengths of (a) and (b). Namely d ₂ ＝d ₃ +d ₄ 。

When the distance d from the first connection point P3 to the coupling slit 120a ₁ The smaller the energy of the first radiating part 111 to which the portion from the third end 121 of the second radiator 120 to the first connection point P3 is coupled is, the lower the voltage to which the first switch 1311 is subjected when the antenna assembly 10 operates in the first frequency band for communication with a satellite is, and thus the risk of burning out the first switch 1311 is reduced or even eliminated, in the case that the length of the first radiating part 111 is fixed and the length of the second radiator 120 is fixed. When the antenna assembly 10 further includes the second matching sub-circuit 132, the voltage applied to the second switch 1321 is lower, thereby reducing or even eliminating the second switch Risk of burnout of the switch 1321. The antenna assembly 10 provided in this embodiment of the present application, the distance d between the first connection point P3 and the coupling slot 120a ₁ The method meets the following conditions: d is 0 to or less ₁ ≤d ₂ The smaller the energy of the first radiating portion 111 to which the portion from the third end 121 of the second radiator 120 to the first connection point P3 is coupled, the lower the voltage to which the first switch 1311 is subjected when the antenna assembly 10 operates in the first frequency band for satellite communication, thereby reducing or even eliminating the risk of burning out the first switch 1311. When the antenna assembly 10 further comprises a second matching sub-circuit 132, the voltage to which the second switch 1321 is subjected is lower, thereby reducing or even eliminating the risk of burning out the second switch 1321.

It will be appreciated that in the schematic diagram of this embodiment, the distance d ₁ The above range of values may be applied to the antenna assembly 10 provided in any of the previous embodiments of the present application, and the antenna assembly 10 shown in the present schematic diagram should not be construed as limiting the antenna assembly 10 provided in the present application.

Referring to fig. 31, 32 and 33, fig. 31 is a schematic diagram of an antenna assembly according to another embodiment of the present application; fig. 32 is an equivalent schematic diagram of the antenna assembly of fig. 31 with the fifth end open; fig. 33 is a current distribution diagram of a fourth resonant mode of the antenna assembly of fig. 32. Embodiments of the present application provide an antenna assembly 10. The antenna assembly 10 includes a first radiator 110, a first matching circuit M1, a first feed source S1, a second radiator 120, and a second matching circuit M2. The first radiator 110 includes a first radiating portion 111. The first radiating portion 111 includes a first end 1111, a first feeding point P1, and a second end 1112, and the first end 1111 is grounded. The first feed source S1 is electrically connected to the first matching circuit M1 to the first feed point P1, and the first feed source S1 is used for supporting a first frequency band of satellite communication or a second frequency band of cellular communication. The second radiator 120 includes a third end 121, a first connection point P3, and a fourth end 122, where the third end 121 is opposite to the second end 1112 and spaced apart to form a coupling slot 120a. The second matching circuit M2 includes a first matching sub-circuit 131, and one end of the first matching sub-circuit 131 is electrically connected to the first connection point P3, and the other end is grounded. The first matching sub-circuit 131 includes a first switch 1311 and a first matching branch 1312 connected in series. When the antenna assembly 10 supports the first frequency band, the first switch 1311 is turned on to ground the third terminal 121 of the second radiator 120 through the first matching sub-circuit 131.

The first radiator 110, the first matching circuit M1, the first feed source S1, the second radiator 120, and the second matching circuit M2 are described in the foregoing, and are not repeated here.

Further, in the present embodiment, the first radiator 110 further includes a second radiating portion 112. The second radiating portion 112 is connected to the first end 1111 of the first radiating portion 111, and the second radiation has a fifth end 1121 remote from the first end 1111, the second radiating portion 112 having a second connection point P4. The antenna assembly 10 further comprises a third matching circuit M3. The third matching circuit M3 is electrically connected to the second connection point P4, and the third matching circuit M3 may be configured to have the antenna assembly 10 in a first state in which the fifth terminal 1121 is open or a second state in which the fifth terminal 1121 is short-circuited. When the antenna assembly 10 is operating in the first frequency band supporting satellite communication, the third matching circuit M3 is configured to place the antenna assembly 10 in the first state. When the antenna assembly 10 is operating in a frequency band other than the first frequency band, the third matching circuit M3 is configured to place the antenna assembly 10 in the second state. Wherein the antenna assembly 10 has a higher hemispherical duty cycle in the first state than in the second state.

The third matching circuit M3 may be configured to place the antenna assembly 10 in a different state, the third matching circuit M3 being configured to place the antenna assembly 10 in the first state when the antenna assembly 10 is operating in the first frequency band supporting satellite communication, the third matching circuit M3 being configured to place the antenna assembly 10 in the second state when the antenna assembly 10 is operating in a frequency band other than the first frequency band, wherein the antenna assembly 10 has a higher hemispherical duty cycle in the first state than in the second state. Therefore, when the antenna assembly 10 is operating in the first frequency band of satellite communications, it has a high hemispherical duty cycle in the pattern. When the antenna assembly 10 uses the first frequency band to communicate with a satellite, the antenna assembly has better communication performance.

Further, when the antenna assembly 10 operates in the first frequency band and when the third matching circuit M3 is configured such that the antenna assembly 10 is in the first state, the antenna assembly 10 has a fourth resonant mode including a quarter wavelength mode of the first end 1111 to the second end 1112, and the same current as the current flowing from the first end 1111 to the second end 1112 is formed at the third end 121 and the fourth end 122, and the same current as the current flowing from the first end 1111 to the second end 1112 is formed at the fifth end 1121 to the first end 1111.

The second radiation portion 112 may be integrally formed with the first radiation portion 111. In the present embodiment, the second radiation portion 112 and the first radiation portion 111 are illustrated as an example of a unitary structure.

The third matching circuit M3 may be controlled such that the fifth terminal 1121 has different states. For example, the third matching circuit M3 may be controlled to open the fifth terminal 1121, or to short the fifth terminal 1121, or to electrically connect the fifth terminal 1121 to other feeds. When the fifth end 1121 is in different states, the antenna structure of the antenna assembly 10 is different, so that the modes of the antenna assembly 10 when operating in the first frequency band are different, the patterns are different, and the upper hemisphere ratio is different.

When the fifth end 1121 is open (open), the equivalent circuit can be seen in fig. 32. When the first end 1111 is open, the first end 1111 is equivalent to a free end.

Referring to fig. 33, in the present embodiment, the first end 1111 to the second endThe corresponding current for the quarter wavelength mode of 1112 is labeled current I ₂₁ The current at the third and fourth terminals 121 and 122 is denoted as current I ₂₂ The current from the fifth end 1121 to the first end 1111 is denoted as current I ₂₃ . It can be seen that the current I ₂₂ Is in accordance with the current I ₂₁ The current I is the same as the flow direction of ₂₃ Is in accordance with the current I ₂₁ Is the same. Alternatively, when the antenna assembly 10 is operated in the first frequency band and the third matching circuit M3 is configured to make the antenna assembly 10 in the first state, the current from the first end 1111 to the second end 1112 corresponds to the current from the third end 121 to the fourth end 122 being the current corresponding to the EE radiation mode; and the currents from the fifth end 1121 to the first end 1111 and from the first end 1111 to the second end 1112 are currents corresponding to a balanced mode of the T-shaped antenna (abbreviated as a balanced mode of T). It can be seen that when the antenna assembly 10 is operated in the first frequency band and when the third matching circuit M3 is configured such that the antenna assembly 10 is in the first state, the antenna assembly 10 has a fourth resonant mode, wherein the fourth resonant mode includes a current corresponding to the EE radiation mode and the balanced mode of T. It can be seen that when the antenna assembly 10 is operating in the first frequency band and in the first state, the antenna assembly 10 has the fourth resonant mode, wherein the fourth resonant mode includes an EE radiation mode and a balanced mode of T. Since the current corresponding to the balanced mode of T is distributed throughout the first radiator 110, in other words, when the antenna assembly 10 operates in the first frequency band and is in the first state, the antenna assembly 10 has the fourth resonant mode, wherein the fourth resonant mode includes an EE radiation mode and a half current mode accompanied by the entire branch of the first radiator 110. The half-current mode of the entire branch of the first radiator 110 is also referred to as the half-wavelength mode of the first radiator 110. The current corresponding to the half wavelength mode of the first radiator 110 is mainly concentrated on the first radiator 110, whereas the current on the ground electrode (also called the floor 40) is smaller, The main radiation direction is upward, and the presence of this mode greatly promotes the upward radiation when the antenna assembly 10 supports the first frequency band, and therefore has good directivity of the directivity pattern and a higher upper hemispherical duty cycle.

In summary, in the antenna assembly 10 provided in the embodiment of the present application, the third matching circuit M3 may be controlled to make the fifth end 1121 have different states, when the fifth end 1121 is open, the antenna assembly 10 operates in the first frequency band, and the antenna assembly 10 has a first mode, the first mode includes a quarter wavelength mode from the first end 1111 to the second end 1112, and the third end 121 and the fourth end 122 form a current with the same current flow direction from the first end 1111 to the second end 1112, and the fifth end 1121 and the first end 1111 form a current with the same current flow direction from the first end 1111 to the second end 1112. As can be seen, the first radiator 110 has a current corresponding to the half-wavelength mode from the fifth end 1121 to the second end 1112, and the current corresponding to the half-wavelength mode from the fifth end 1121 to the second end 1112 is mainly concentrated on the first radiator 110, and the current on the ground is smaller, so that the antenna assembly 10 supports the first frequency band and has a main radiation direction upwards, good directivity of the directivity pattern and a higher upper hemisphere ratio. Therefore, the antenna assembly 10 provided in the embodiment of the present application has a better communication effect when the first frequency band is used to communicate with a satellite.

Referring to fig. 34 and 35 together, fig. 34 is a schematic diagram of a current distribution of a fifth resonant mode of the antenna assembly in fig. 32; fig. 35 is a current distribution diagram of a sixth resonant mode of the antenna assembly of fig. 32. The second radiating portion 112 also has a ground point G0. The ground point G0 is grounded, and the ground point G0 is adjacent to the first end 1111 as compared to the first feeding point P1. When the antenna assembly 10 is in the first state: the antenna assembly 10 also has a fifth resonant mode and a sixth resonant mode. Wherein the fifth resonant mode comprises a quarter wavelength mode of the first end 1111 to the second end 1112, and forms a current at the third end 121 and the fourth end 122 that is the same as a current flowing from the first end 1111 to the second end 1112; and forming a current flow opposite to a current flow of the first end 1111 to the second end 1112 at the ground point G0 to the fifth end 1121. The sixth resonant mode includes a quarter wavelength mode of the first end 1111 to the second end 1112, and a current flow opposite to that of the first end 1111 to the second end 1112 is formed at the third end 121 and the fourth end 122.

Referring to fig. 34, a current corresponding to a quarter-wavelength mode from the first end 1111 to the second end 1112 is denoted as I ₂₁ The current at the third and fourth terminals 121 and 122 is labeled I ₂₂ The current from the ground point G0 to the fifth terminal 1121 is labeled I ₂₄ . It can be seen that the current I ₂₂ Is in accordance with the current I ₂₁ The current I is the same as the flow direction of ₂₄ Is in accordance with the current I ₂₁ Is opposite to the flow direction of the flow. In other words, in the present embodiment, when the antenna assembly 10 is operated in the first frequency band and is in the first state: in the fifth resonant mode, the current from the first end 1111 to the second end 1112 and the current from the third end 121 to the fourth end 122 are currents corresponding to EE radiation modes. In other words, the fourth resonant mode includes a radiation mode from the first end 1111 to the fourth end 122, and a quarter wavelength current mode from the ground point G0 to the fifth end 1121.

Referring to fig. 35, a current corresponding to a quarter-wavelength mode from the first end 1111 to the second end 1112 is denoted as I ₂₁ The current from the fourth terminal 122 to the third terminal 121 is labeled I ₂₅ Wherein the current I ₂₅ And current I ₂₁ Is opposite to the flow direction of the flow. In other words, in the present embodiment, when the antenna assembly 10 is operated in the first frequency band and is in the first state: in the sixth resonant mode, the current from the first end 1111 to the second end 1112 and the current from the fourth end 122 to the third end 121 are currents corresponding to the EE balanced mode. In other wordsThe sixth resonant mode includes an EE balanced mode from the first end 1111 to the fourth end 122. Therefore, when the antenna assembly 10 is in the first state in which the fifth end 1121 is open, the antenna assembly 10 not only has the fourth resonant mode, but also has the fifth resonant mode and the sixth resonant mode to support the first frequency band together, so that when the antenna assembly 10 is in the first state, the antenna assembly 10 can support the first frequency band by using more modes, so that the antenna assembly 10 has better communication effect in the first frequency band.

Referring to fig. 36, fig. 36 is a schematic view of a portion of the antenna assembly shown in fig. 31. The third matching circuit M3 includes a third matching branch 152 and a third switch 151. The third switch 151 has a fifth connection 1511 and a sixth connection 1512. The antenna assembly 10 also includes a second feed S2. The second feed S2 electrically connects the third matching branch 152 to the fifth connection point 1511, the sixth connection point 1512 is electrically connected to the second connection point P4, and the antenna assembly 10 is in the first state when an open circuit exists between the fifth connection point 1511 and the sixth connection point 1512.

The third matching circuit M3 in this embodiment is simple and easy to implement.

In addition, when the fifth connection 1511 and the sixth connection 1512 are open, the antenna assembly 10 is in the first state, and when the antenna assembly 10 is operating in the first frequency band for satellite communication, the first excitation signal fed by the first feed S1 has higher power and higher energy. At this time, if an open circuit exists between the fifth connection end 1511 and the sixth connection end 1512, the second feed source S2 is electrically disconnected from the second connection point P4, and the first excitation signal fed by the first feed source S1 cannot be injected into the second feed source S2 through the second connection point P4 of the first radiator 110. In case that the first excitation signal fed by the first feed source S1 is fed into the second feed source S2, a risk of damaging the second feed source S2 may occur. According to the antenna assembly 10 provided by the embodiment of the application, the second feed source S2 is electrically connected with the matching branch to the fifth connection end 1511, the sixth connection end 1512 is electrically connected to the second connection point P4, and when an open circuit exists between the fifth connection end 1511 and the sixth connection end 1512, the second feed source S2 is electrically disconnected from the second connection point P4, so that a first excitation signal fed by the first feed source S1 cannot be poured into the second feed source S2 through the second connection point P4 of the first radiator 110, and the risk that the second feed source S2 is damaged due to the fact that the first excitation signal is poured into the second feed source S2 is reduced or even avoided.

With continued reference to fig. 31 and 36, the antenna assembly 10 further has a state in which the third switch 151 is turned on. When the antenna assembly 10 is not operating in the first frequency band for satellite communication, and the third matching circuit M3 is configured to enable the antenna assembly 10 to be in the second state, the second feed source S2 is electrically connected to the second connection point P4 through the third matching circuit M3, and the second feed source S2 is used for supporting a third frequency band.

When the antenna assembly 10 does not work in the first frequency band, the second feed source S2 is configured to support the third frequency band, so that the antenna assembly 10 provided in the embodiment of the present application can support the third frequency band, and therefore, the antenna assembly 10 can support more frequency bands, and has better communication performance.

Referring to fig. 37, fig. 37 is a schematic diagram of a current mode when the antenna assembly in fig. 31 supports a third frequency band. When the antenna assembly 10 supports the third frequency band, the quarter wavelength mode of the second radiating portion 112 supports the third frequency band.

The quarter-wavelength mode is also called a fundamental mode, and when the quarter-wavelength mode of the second radiating portion 112 operates in the second frequency band, that is, the fundamental mode of the second radiating portion 112 operates in the second frequency band, the radiation efficiency is higher.

The "wavelength" in the "quarter-wavelength mode" in the "third frequency band" is supported by the "quarter-wavelength mode of the second radiation portion 112," and refers to a wavelength corresponding to the center frequency point of the second frequency band.

Further, in an embodiment, the third frequency Band includes a Low frequency (LB) Band; or the L1 frequency band (1.575 GHz) of a global positioning system (Global Positioning System, GPS); or GPS-L5 band (1.176 GHz); or LB frequency band + WIFI2.4G frequency band; or GPS-L1 frequency band + WIFI2.4G frequency band (2.4 GHz-2.5 GHz); or the GPS-L5 band + WIFI2.4G band.

In this embodiment, the frequency of the first frequency band is a frequency band supporting satellite communication, and is 2.0 GHz-2.2 GHz, that is, the frequency of the first frequency band is greater than or equal to 2.0GHz and less than or equal to 2.2GHz. The antenna assembly 10 provided in this embodiment can support frequency bands of 2.0GHz to 2.2GHz, and LB frequency bands; or the GPS L1 frequency band; or GPS-L5 frequency band; or LB frequency band + WIFI2.4G frequency band; or the GPS-L1 frequency band + WIFI2.4G frequency band; or the GPS-L5 frequency band + WIFI2.4G frequency band, can meet the communication requirement of the specific frequency band of the antenna assembly 10.

Referring to fig. 38, fig. 38 is a schematic diagram of an antenna assembly according to another embodiment of the present application. In the present embodiment, the second radiator 120 has a second feeding point P2, and the second feeding point P2 is further away from the third end 121 than the first connecting point P3. The antenna assembly 10 also includes a fourth switch 160 and a third feed S3. The third feed source S3 is electrically connected to the second feed point P2 through the fourth switch 160, and the third feed source S3 is used for supporting a fourth frequency band. When the antenna assembly 10 is operating in the first frequency band for satellite communications, the fourth switch 160 is opened. When the antenna assembly 10 is not operating in the first frequency band, the fourth switch 160 is turned on, so that the antenna assembly 10 supports the fourth frequency band.

In the schematic diagram of the present embodiment, the antenna assembly 10 further includes the fourth switch 160 and the third feed source S3 are illustrated as being incorporated into the antenna assembly 10 provided in the previous embodiment, and it should be understood that the schematic diagram of the present embodiment should not be construed as limiting the embodiment of the present application. The antenna assembly 10 further includes a fourth switch 160 and a third feed S3 that may be coupled to the antenna assembly 10 provided in any of the previous embodiments.

As can be seen from the foregoing description, when the antenna assembly 10 is operated in the first frequency band, the first switch 1311 is turned on, the second radiator 120 couples the energy of the first radiator 110, and the current of the second radiator 120 passes through the first connection point P3 to the ground. The second feeding point P2 is further away from the third end 121 than the first connecting point P3, and the first resonant current supporting the first frequency band in communication with the satellite in the first feed source S1 is less or even cannot reach the second feeding point P2, so that the operation of the third feed source S3 is not affected, and there is no risk that the first resonant current supporting the first frequency band in communication with the satellite burns out the third feed source S3.

Further, when the antenna assembly 10 is operating in the first frequency band for satellite communication, the fourth switch 160 is turned off to further secure the third feed S3 and the fourth switch 160.

When the antenna assembly 10 does not operate in the first frequency band, the fourth switch 160 is turned on, so that the antenna assembly 10 supports the fourth frequency band, and therefore, the antenna assembly 10 can support more frequency bands and has better communication effect.

Further, in an embodiment, the fourth frequency band includes: n77 frequency band; or N78 band; or N79 frequency band; or GPS-L5 frequency band; or a WIFI5G frequency band; or an N77 frequency band plus a WIFI5G frequency band; or an N78 frequency band plus a WIFI5G frequency band; or an N79 frequency band plus a WIFI5G frequency band; or GPS-L5 frequency band+WIFI 5G frequency band; or the N77 frequency band plus the GPS-L5 frequency band; or the N78 frequency band plus the GPS-L5 frequency band; or the N79 band + GPS-L5 band.

The fourth frequency band is also a frequency band of cellular communication, and the fourth frequency band is a frequency band of cellular communication, and does not affect the operation of the antenna assembly 10 in the first frequency band of satellite communication.

In this embodiment, the fourth frequency band includes: n77 frequency band; or N78 band; or N79 frequency band; or GPS-L5 frequency band; or a WIFI5G frequency band; or an N77 frequency band plus a WIFI5G frequency band; or an N78 frequency band plus a WIFI5G frequency band; or an N79 frequency band plus a WIFI5G frequency band; or GPS-L5 frequency band+WIFI 5G frequency band; or the N77 frequency band plus the GPS-L5 frequency band; or the N78 frequency band plus the GPS-L5 frequency band; or the N79 frequency band + GPS-L5 frequency band, such that the antenna assembly 10 may meet the requirements of a particular frequency band.

Referring to the drawings of the foregoing embodiments, referring to fig. 39, fig. 39 is a schematic diagram of an antenna assembly according to another embodiment of the present application. For example, fig. 31, etc., in an embodiment, the antenna assembly 10 further includes a second feed S2. The second feed source S2 is electrically connected to the third matching circuit M3 to the fifth connection end 1511. The second radiation portion 112 further has one or a plurality of ground points G0 disposed at intervals, and the ground points G0 are grounded.

In the related schematic drawings, the second radiation portion 112 has a ground point G0 as an example, and it should be understood that the antenna assembly 10 provided in the embodiment of the present application should not be construed as limited. In other embodiments, the second radiating portion 112 further has a plurality of ground points G0 disposed at intervals. The plurality of ground points G0 are each farther from the first feeding point P1 than the ground point of the first end 1111. The spacing between the plurality of ground points G0 is not limited in the present application.

In this embodiment, the ground point G0 may improve the isolation between the first feed source S1 and the second feed source S2. It may be appreciated that, increasing the isolation between the first feed source S1 and the second feed source S2 and increasing the directivity of the pattern and the upper hemisphere duty ratio of the antenna assembly 10 supporting the first frequency band are parameters of two dimensions of the antenna assembly 10, and increasing the isolation between the first feed source S1 and the second feed source S2 does not affect increasing the directivity of the pattern and the upper hemisphere duty ratio of the antenna assembly 10 supporting the first frequency band. In other words, the improvement of the isolation between the first feed S1 and the second feed S2 does not conflict with the improvement of the directivity pattern and the upper hemisphere duty ratio of the antenna assembly 10 supporting the first frequency band.

Referring to fig. 10 and 40 together, fig. 40 is a schematic diagram of an antenna assembly according to another angle of the antenna assembly shown in fig. 10. The first radiator 110 extends in a first direction D1. The second radiator 120 includes a third radiating portion 120b and a fourth radiating portion 120c. The third radiating portion 120b has the third end 121, the third radiating portion 120b extends along the first direction D1, the fourth radiating portion 120c is bent and connected with the third radiating portion 120b, the fourth radiating portion 120c has the fourth end 122, and the fourth radiating portion 120c extends along the second direction D2.

In an embodiment, the first direction D1 is an extending direction of a short side of the electronic device 1 to which the antenna assembly 10 is applied, and the second direction D2 is an extending direction of a long side of the electronic device 1 to which the antenna assembly 10 is applied. The above structures of the first radiator 110 and the second radiator 120 are simple in structure and convenient to implement.

It will be appreciated that in the antenna assembly 10 provided in the foregoing embodiments, the second radiator 120 is illustrated as being located on the right side of the first radiator 110, and it will be appreciated that in other embodiments, the second radiator 120 may be located on the left side of the first radiator 110. The antenna assembly 10 shown in the embodiments of the present application may be mirrored left and right to obtain a new antenna assembly 10 provided in the embodiments.

Referring to fig. 41 and 42, fig. 41 is a schematic diagram of an electronic device according to an embodiment of the present application; fig. 42 is a partial schematic structural view of the electronic apparatus shown in fig. 41. The embodiment of the application also provides the electronic equipment 1. The electronic device 1 includes, but is not limited to, devices capable of transmitting and receiving electromagnetic wave signals such as a mobile phone, a telephone, a television, a tablet personal computer (Pad), a camera, a personal computer, a notebook computer (Personal Computer, PC), a vehicle-mounted device, an earphone, a wristwatch, a wearable device, a base station, a vehicle-mounted radar, a customer premise equipment (CustomerPremise Equipment, CPE), and the like. In this application, the electronic device 1 is taken as an example of a mobile phone, and other devices may refer to the specific description in this application. The electronic device 1 may comprise an antenna assembly 10 as described in any of the previous embodiments. The antenna assembly 10 is described above, and will not be described in detail herein.

In summary, in the antenna assembly 10 of the electronic device 1 provided in the embodiment of the present application, since the coupling slot 120a is formed between the third end 121 of the second radiator 120 and the second end 1112 of the first radiator 110, the second radiator 120 can couple (also referred to as EE coupling) the energy of the first radiator 110 through the electric field of the coupling slot 120 a. When the second radiator 120 couples the energy of the first radiator 110 through the coupling slot 120a by electric field coupling, a part of the energy is radiated to the free space, and a part of the energy is coupled to the second radiator 120. Accordingly, the energy coupled to the second radiator 120 is attenuated compared to the energy of the first radiator 110, and thus, the voltage received by the first switch 1311 in the first matching sub-circuit 131 is reduced. On the other hand, when the first switch 1311 in the second matching circuit M2 is turned on, the third terminal 121 of the second radiator 120 is grounded through the first matching sub-circuit 131, and therefore, a portion between the first connection point P3 and the fourth terminal 122 in the second radiator 120 is shorted. Since the dimension from the first connection point P3 to the coupling slot 120a is smaller than the dimension of the second radiator 120, the main current when the antenna assembly 10 supports the first frequency band is substantially concentrated on the first radiator 110, but not on the second radiator 120, so that the voltage borne by the first switch 1311 in the first matching sub-circuit 131 is also reduced. For the two reasons described above, when the antenna assembly 10 is operating in the first frequency band for satellite communications, the voltage experienced by the first switch 1311 is lower, thereby reducing or even eliminating the risk of the first switch 1311 being burned out.

Further, the electronic device 1 has a top 1a and a bottom 1b disposed opposite to each other, and the first radiator 110 and the second radiator 120 are disposed on the top 1a of the electronic device 1.

In the antenna assembly 10 provided in the foregoing embodiments, the first radiator 110 and the second radiator 120 are both located on the top 1a of the floor 40 (in this embodiment, the frame body 310 of the frame 30 in the floor 40). In an embodiment, the top 1a of the floor 40 is the top 1a of the electronic device 1.

The top 1a of the electronic device 1 is generally referred to as the portion that is located above when the electronic device 1 is in use. Generally, the top 1a of the electronic device 1 occupies one third or less of the whole electronic device 1. Accordingly, the bottom 1b of the electronic device 1 is generally referred to as a portion that is located below when the electronic device 1 is in use. Generally, the bottom 1b of the electronic device 1 occupies one third or less than one third of the whole electronic device 1.

Since the satellite is located on the sky, i.e. the satellite is located above the electronic device 1. In the electronic device 1 provided in this embodiment, the first radiator 110 and the second radiator 120 are disposed at the top 1a of the electronic device 1, so that when the antenna assembly 10 works in the first frequency band for satellite communication, the communication effect is better.

The electronic device 1 has a top edge 11a and a side edge 11b which is connected to the top edge 11a in a bent manner. The top edge 11a is located at the top 1a and the side edge 11b has a predetermined section 11c located at the top 1 a. The first radiator 110 is disposed on the top edge 11a, a portion of the second radiator 120 is disposed on the top edge 11a, and another portion of the second radiating portion 112120c is disposed on the predetermined portion 11c of the side edge 11b.

In this embodiment, the length of the top edge 11a is smaller than the length of the side edge 11b, i.e. the top edge 11a is a short side of the electronic device 1, and the side edge 11b is a long side of the electronic device 1. It should be understood that the antenna assembly 10 provided in the embodiments of the present application should not be construed as limiting.

Since the satellite is located on the sky, i.e. the satellite is located above the electronic device 1. In the electronic device 1 provided in the embodiment of the application, the top edge 11a is located at the top 1a, and the side edge 11b has a preset section 11c located at the top 1 a. The first radiator 110 is disposed on the top edge 11a, the second radiator 120 is partially disposed on the top edge 11a, and the other part of the second radiating portion 112120c is disposed on the preset section 11c of the side edge 11b, so that the antenna assembly 10 has better communication effect when operating in the first frequency band for satellite communication.

Referring to fig. 41, in an embodiment, the middle frame 30 includes a frame body 310 and a frame 320. The frame 320 is enclosed around the periphery of the frame body 310. The first radiator 110 and the second radiator 120 are formed on the frame.

The middle frame 30 is generally conductive, such as a metal material (e.g., aluminum, or aluminum magnesium alloy). In the electronic device 1, the middle frame 30 is typically used to carry a display screen 70, as well as to carry a battery cover. Since the middle frame 30 is conductive, the middle frame 30 may also act as a ground. The devices in the electronic apparatus 1 may be directly or indirectly electrically connected to the center 30 to be grounded.

Specifically, in the present embodiment, the frame 320 has an outer surface 320a facing away from the frame body 310. A first gap 320b is formed between the top edge portion of the frame 320 and the frame body 310, and the frame 320 has a second gap 320c (i.e., the coupling gap 120 a) located on the outer surface 320a and communicating with the first gap 320 b. The first slit 320b and the second slit 320c together define the first radiating portion 111 of the first radiator 110. The frame 320 has a third gap 320d between the portion thereof located at the side and the frame body 310. The third slit 320d communicates with the first slit 320b, and the third slit 320d, the first slit 320b, and the second slit 320c together define the second radiator 120. It can be seen that the partial frame 320 is formed as the first radiator 110 and the second radiator 120.

In this embodiment, the frame body 310 may serve as a ground electrode. The ground point G0 of the first radiator 110 is electrically connected to the frame body 310 to be grounded, and the fourth end 122 of the second radiator 120 is electrically connected to the frame body 310 to be grounded.

Compared to the structure in which at least one of the first radiator 110 and the second radiator 120 is independent of the middle frame 30, in the present embodiment, the partial frame 320 of the middle frame 30 of the electronic device 1 is multiplexed into the first radiator 110 and the second radiator 120, so that the electronic device 1 has smaller volume and more convenient assembly.

In other embodiments, the electronic device 1 further includes a display 70, a middle frame 30, and a housing 90 (also referred to as a battery cover). The display 70 and the housing 90 are respectively disposed on two opposite sides of the middle frame 30.

In addition, in an embodiment, the middle frame 30 and at least one of the housing 90 and the display screen 70 further form a receiving space. The electronic device 1 further includes a battery disposed in the accommodating space, and a functional device (the functional device may include one or more of a camera module, a microphone, a receiver, a speaker, a face recognition module, and a fingerprint recognition module) and the like, which are capable of implementing the basic functions of the mobile phone, and will not be described in detail in this embodiment. It should be understood that the foregoing description of the electronic device 1 is merely illustrative of one environment in which the antenna assembly 10 may be used, and the specific structure of the electronic device 1 should not be construed as limiting the antenna assembly 10 provided herein. In other embodiments, the electronic device 1 may not include at least one of the display 70 and the housing 90.

Referring to fig. 43, fig. 43 is a circuit block diagram of an electronic device according to an embodiment of the present application. The electronic device 1 further comprises a processor 50, the processor 50 being electrically connected to the second matching circuit M2 for controlling the state of the second matching circuit M2.

In the schematic diagram of the present embodiment, the electronic device 1 further includes the processor 50 incorporated in the antenna assembly 10 provided in the previous embodiment, and it should be understood that the specific structure of the antenna assembly 10, especially the specific structure of the second matching circuit M2, shown in the present schematic diagram should not be construed as limiting the electronic device 1 provided in the present embodiment. The electronic device 1 further comprises a processor 50 which may be incorporated into the antenna assembly 10 provided in the other embodiments described above.

The second matching circuit M2 is controlled by the processor 50, and when the antenna assembly 10 supports the first frequency band, the processor 50 controls the first switch 1311 in the second matching circuit M2 to be turned on. The third end 121 of the second radiator 120 has a coupling gap 120a with the second end 1112 of the first radiator 110, so that the second radiator 120 can couple (also referred to as EE coupling) energy of the first radiator 110 through an electric field of the coupling gap 120 a. When the second radiator 120 couples the energy of the first radiator 110 through the coupling slot 120a by electric field coupling, a part of the energy is radiated to the free space, and a part of the energy is coupled to the second radiator 120. Accordingly, the energy coupled to the second radiator 120 is attenuated compared to the energy of the first radiator 110, and thus, the voltage received by the first switch 1311 in the first matching sub-circuit 131 is reduced. On the other hand, when the first switch 1311 in the second matching circuit M2 is turned on, the third terminal 121 of the second radiator 120 is grounded through the first matching sub-circuit 131, and therefore, a portion between the first connection point P3 and the fourth terminal 122 in the second radiator 120 is shorted. Since the dimension from the first connection point P3 to the coupling slot 120a is smaller than the dimension of the second radiator 120, the main current when the antenna assembly 10 supports the first frequency band is substantially concentrated on the first radiator 110, but not on the second radiator 120, so that the voltage borne by the first switch 1311 in the first matching sub-circuit 131 is also reduced. For the two reasons described above, when the antenna assembly 10 is operating in the first frequency band for satellite communications, the voltage experienced by the first switch 1311 is lower, thereby reducing or even eliminating the risk of the first switch 1311 being burned out.

When the antenna assembly 10 further comprises a third matching circuit M3, the processor 50 is further electrically connected to the third matching circuit M3 for controlling the state of the third matching circuit M3.

While the foregoing is directed to embodiments of the present application, it will be appreciated by those of ordinary skill in the art that numerous modifications and variations can be made without departing from the principles of the present application, and such modifications and variations are also considered to be within the scope of the present application.

Claims

1. An antenna assembly, the antenna assembly comprising:

a first matching circuit;

2. The antenna assembly of claim 1, wherein the antenna assembly has a first resonant mode when the antenna assembly supports the first frequency band, the first resonant mode including a quarter wavelength mode from the first end to the second end, and forming a current flow at the third end to the first connection point that is the same as a current flow at the first end to the second end.

3. The antenna assembly of claim 2, the first resonant mode generating a first resonant current and a second resonant current, wherein the first resonant current is distributed from the first end to the second end, the second resonant current is distributed from the third end to the first connection point, and from the first matching sub-circuit down, wherein a current intensity J1 of the first resonant current and a current intensity J2 of the second resonant current satisfy: j2 < J1.

4. The antenna assembly of claim 1, wherein the first switch includes a first connection terminal electrically connecting the first matching branch to the first connection point and a second connection terminal electrically connected to ground, the first switch being turned on when the first connection terminal is electrically connected to the second connection terminal.

5. The antenna assembly of claim 1, wherein the first matching branch comprises a shorting line; or an inductance, wherein the inductance value of the inductance is less than or equal to 5nH.

6. The antenna assembly of claim 1, wherein the first frequency band comprises a transmit sub-band and a receive sub-band;

the second matching circuit further includes:

the second matching sub-circuit is electrically connected to the first connecting point at one end and grounded at the other end, and comprises a second switch and a second matching branch circuit which are connected in series;

when the antenna component works in a transmitting sub-frequency band of the first frequency band, the first switch is turned on and the second switch is turned off; when the antenna assembly supports the receiving sub-band of the first band, the first switch is turned on and the second switch is turned on.

7. The antenna assembly of claim 6, wherein the second switch includes a third connection terminal electrically connecting the second matching branch to the first connection point and a fourth connection terminal electrically connected to ground; when the third connecting end is electrically connected with the fourth connecting end, the second switch is conducted; and when the third connecting end and the fourth connecting end are electrically disconnected, the second switch is disconnected.

8. The antenna assembly of claim 6, wherein the second matching branch comprises a shorting line; or an inductance, wherein the inductance value of the inductance is less than or equal to 5nH.

9. The antenna assembly of claim 6 wherein the second switch is open when the antenna assembly is operating in the second frequency band.

10. The antenna assembly of claim 9, wherein the second frequency band comprises a first sub-band and a second sub-band, the antenna assembly having a second resonant mode and a three resonant mode, wherein the second resonant mode supports the first sub-band and the second resonant mode supports the second sub-band.

11. The antenna assembly of claim 10, wherein the second resonant mode comprises a quarter-wave mode from the first end to the second end, and wherein the same current flow is established from the third end to the fourth end as the current flow from the first end to the second end;

the third resonant mode includes a quarter wavelength mode from the first end to the second end, and a current flow opposite to a current flow from the first end to the second end is formed at the third end to the fourth end.

12. The antenna assembly of claim 10, wherein the first sub-band comprises a B3 band and the second sub-band comprises a B41 band.

13. The antenna assembly of claim 1, the first radiator further comprising: a second radiating portion connected to the first end of the first radiating portion, the second radiating portion having a fifth end remote from the first end, the second radiating portion having a second connection point;

the antenna assembly further comprises: a third matching circuit electrically connected to the second connection point, the third matching circuit configurable to have the antenna assembly have a first state with the fifth end open or a second state with the fifth end short;

When the antenna assembly is operated in the first frequency band supporting satellite communication, the third matching circuit is configured to enable the antenna assembly to be in the first state; the third matching circuit is configured to place the antenna assembly in the second state when the antenna assembly is operating in a frequency band other than the first frequency band, wherein the antenna assembly has a higher hemispherical duty cycle in the pattern when in the first state than when in the second state.

14. The antenna assembly of claim 13, wherein when the antenna assembly is operating in the first frequency band and when the third matching circuit is configured such that the antenna assembly is in a first state, the antenna assembly has a fourth resonant mode including a quarter wavelength mode of the first end to the second end, and a current flow in the third end and the fourth end that is the same as a current flow in the first end to the second end, and a current flow in the fifth end to the first end that is the same as a current flow in the first end to the second end.

15. The antenna assembly of claim 14, the second radiating portion further having a ground point, the ground point being grounded and the ground point being adjacent the first end as compared to the first feed point;

When the third matching circuit is configured to cause the antenna assembly to be in the first state: the antenna assembly also has a fifth resonant mode and a sixth resonant mode;

wherein the fifth resonant mode comprises a quarter-wavelength mode from the first end to the second end and forms a current at the third end and the fourth end that is the same as the current flowing from the first end to the second end; and forming a current flow opposite to a current flow of the first end to the second end at the ground point to the fifth end;

the sixth resonant mode includes a quarter wavelength mode from the first end to the second end and a current flow opposite to a current flow from the first end to the second end is formed at the third end and the fourth end.

16. The antenna assembly of claim 14, wherein the third matching circuit comprises a third matching branch and a third switch, the third switch having a fifth connection and a sixth connection; the antenna assembly further comprises:

a second feed;

the second feed source is electrically connected with the third matching branch to the fifth connecting end, the sixth connecting end is electrically connected with the second connecting point, and when an open circuit exists between the fifth connecting end and the sixth connecting end, the antenna assembly is in the first state.

17. The antenna assembly of claim 16, wherein the second feed is electrically connected to the second connection point through the third matching circuit when the antenna assembly is not operating in a first frequency band for communication with a satellite and the third matching circuit is configured to place the antenna assembly in the second state, the second feed for supporting a third frequency band, and the like.

18. The antenna assembly of claim 17 wherein a quarter wavelength mode of the second radiating portion supports the third frequency band.

19. The antenna assembly of claim 17, wherein the third frequency band comprises: LB frequency band; or GPS-L1 frequency band; or GPS-L5 frequency band, or LB frequency band + WIFI2.4G frequency band; or the GPS-L1 frequency band + WIFI2.4G frequency band; or the GPS-L5 band + WIFI2.4G band.

20. The antenna assembly of claim 1, wherein the second radiator has a second feed point that is further from the third end than the first connection point, the antenna assembly further comprising:

a fourth switch;

the third feed source is connected to the second feed point through the fourth switch and is used for supporting a fourth frequency band;

When the antenna assembly works in the first frequency band communicated with a satellite, the fourth switch is turned off; when the antenna component does not work in the first frequency band, the fourth switch is conducted so that the antenna component supports the fourth frequency band.

21. The antenna assembly of claim 20, wherein the fourth frequency band comprises: n77 frequency band; or N78 band; or N79 frequency band; or GPS-L5 frequency band; or a WIFI5G frequency band; or an N77 frequency band plus a WIFI5G frequency band; or an N78 frequency band plus a WIFI5G frequency band; or an N79 frequency band plus a WIFI5G frequency band; or GPS-L5 frequency band+WIFI 5G frequency band; or the N77 frequency band plus the GPS-L5 frequency band; or the N78 frequency band plus the GPS-L5 frequency band; or the N79 band + GPS-L5 band.

22. An electronic device comprising an antenna assembly according to any of claims 1-21;