CN114552166A

CN114552166A - Antenna assembly and electronic equipment

Info

Publication number: CN114552166A
Application number: CN202210164088.5A
Authority: CN
Inventors: 吴小浦
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-05-27
Also published as: WO2023160131A1

Abstract

The application provides an antenna module and an electronic device. The antenna assembly comprises a first antenna and a second antenna; the first antenna comprises a first radiator, a first matching circuit and a first signal source, and the first signal source is electrically connected to the first radiator through the first matching circuit; the second antenna comprises a second radiator, a second matching circuit and a second signal source, one end of the second radiator is grounded, the other end of the second radiator and one end of the first radiator form a coupling gap, the other end of the first radiator is grounded, the second signal source is electrically connected with the second matching circuit to the second radiator, the second matching circuit comprises a frequency-selecting filter sub-circuit and a band-pass sub-circuit, one end of the frequency-selecting filter sub-circuit is electrically connected with a connection point of the second radiator, and the other end of the frequency-selecting filter sub-circuit is grounded; one end of the band-pass sub-circuit is electrically connected with the connecting point, and the other end of the band-pass sub-circuit is electrically connected with a second signal source; the first antenna supports first and second frequency bands, and the second antenna supports a third frequency band. The antenna assembly of the application has a better communication effect.

Description

Antenna assembly and electronic equipment

Technical Field

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

Background

With the development of technology, electronic devices such as mobile phones and the like having communication functions have higher popularity and higher functions. Antenna assemblies are often included in electronic devices to implement communication functions of the electronic devices. However, the antenna assembly in the electronic device in the related art has not good enough communication performance, and there is room for improvement.

Disclosure of Invention

In a first aspect, the present application provides an antenna assembly. The antenna assembly includes:

the first antenna comprises a first radiating body, a first matching circuit and a first signal source, wherein the first radiating body is provided with a first grounding end and a first free end, the first grounding end is grounded, and the first signal source is electrically connected to the first radiating body through the first matching circuit; and

the second antenna comprises a second radiator, a second matching circuit and a second signal source, wherein the second radiator is provided with a second grounding end and a second free end, the second grounding end is grounded, the second free end and the first free end are arranged at intervals and form a coupling gap, the second radiator is coupled with the first radiator through the coupling gap, the second signal source is electrically connected with the second matching circuit to the second radiator, the second radiator is also provided with a connecting point, the second matching circuit comprises a frequency-selecting filter sub-circuit and a band-pass sub-circuit, one end of the frequency-selecting filter sub-circuit is electrically connected with the connecting point, the other end of the frequency-selecting filter sub-circuit is grounded, and the frequency-selecting filter sub-circuit is a band-stop circuit of a third frequency band and is a band-pass circuit of a second frequency band; one end of the band-pass sub-circuit is electrically connected with the connecting point, the other end of the band-pass sub-circuit is electrically connected with the second signal source, and the band-pass sub-circuit is a band-pass circuit of the third frequency band;

the first antenna is used for supporting a first frequency band and a second frequency band, and the second antenna is used for supporting a third frequency band.

In a second aspect, the present application further provides an electronic device including the antenna assembly of the first aspect, the electronic device having a top and a bottom, the first radiator and the second radiator being disposed on the top.

According to the antenna assembly provided by the embodiment of the application, the second free end and the first free end are arranged at intervals and form a coupling gap, so that the first antenna can be used not only by the first radiator but also by the second radiator during working, and the first antenna can support the first frequency band and the second frequency band, and therefore the antenna assembly has a good communication effect. Accordingly, the second antenna can utilize not only the second radiator but also the first radiator when operating. In other words, the first antenna and the second antenna are common-aperture antennas. In the antenna assembly according to the embodiment of the present invention, when the frequency band of the electromagnetic wave signal received and transmitted by the first antenna is fixed, the length of the first radiator of the first antenna is shorter than that when the first antenna is operated, the first radiator can only be used and the second radiator cannot be used. In addition, under the condition that the frequency band of the electromagnetic wave signal transmitted and received by the second antenna is constant, compared with the condition that the second antenna can only utilize the second radiator when working and cannot utilize the first radiator, the length of the second radiator of the second antenna in the antenna assembly provided by the embodiment of the application is shorter. Therefore, the length of the first radiator and the length of the second radiator in the antenna assembly provided by the embodiment of the application are both shorter, the size of the antenna assembly is smaller, and the occupied space is smaller. When the antenna assembly is applied to electronic equipment, the antenna assembly is convenient to arrange with other devices in the electronic equipment.

Furthermore, the second matching circuit includes a frequency-selective filtering sub-circuit, which is a band-stop circuit of the third frequency band and a band-pass circuit of the second frequency band, so that the second signal source is added to the antenna assembly, which not only enables the second antenna to support the third frequency band, but also does not affect the second frequency band in which the first antenna originally works. The band-pass sub-circuit is a band-pass circuit of the third frequency band, that is, the band-pass sub-circuit presents low impedance to the third frequency band, and presents high impedance to other frequency bands (in this embodiment, the first frequency band and the second frequency band), so as to isolate the other frequency bands. The antenna assembly provided by the embodiment of the application has better communication performance. Therefore, the antenna assembly provided by the embodiment of the application has better communication performance.

Drawings

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

Fig. 1 is a schematic diagram of an antenna assembly provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of a second matching circuit provided in one embodiment of FIG. 1;

FIG. 3 is a circuit diagram of one embodiment of the frequency selective filter sub-circuit shown in FIG. 2;

FIG. 4 is a schematic diagram of a second matching circuit provided in another embodiment of FIG. 1;

FIG. 5 is a schematic diagram of a second matching circuit provided in the further embodiment of FIG. 1;

FIG. 6 is a schematic circuit diagram of the bandpass sub-circuit provided in one embodiment of FIG. 5;

FIG. 7 is a schematic circuit diagram of the band stop sub-circuit provided in one embodiment of FIG. 5;

FIG. 8 is a schematic diagram of a second matching circuit provided in the embodiment of FIG. 1;

FIG. 9 is a schematic diagram of a tuning sub-circuit provided in one embodiment in FIG. 8;

FIG. 10 is a schematic diagram of a tuning sub-circuit provided in the further embodiment of FIG. 8;

FIG. 11 is a schematic diagram of S-parameters of the first antenna and the second antenna when the switch is in an open state in the antenna assembly;

FIG. 12 is a schematic diagram of S parameters of the first antenna and the second antenna when the switch of the antenna assembly is in a closed state;

fig. 13 is a schematic diagram illustrating a current distribution corresponding to a first resonant mode in an antenna assembly according to an embodiment;

fig. 14 is a schematic diagram illustrating a current distribution corresponding to a second resonant mode in an antenna assembly according to an embodiment;

fig. 15 is a schematic diagram illustrating a current distribution corresponding to a third resonant mode in an antenna assembly according to an embodiment;

fig. 16 is a schematic diagram illustrating a current distribution corresponding to a fourth resonant mode in an antenna assembly according to an embodiment;

fig. 17 is a schematic view of an antenna assembly provided in another embodiment of the present application;

fig. 18 is a schematic view of an antenna assembly provided in accordance with yet another embodiment of the present application;

FIG. 19 is a schematic diagram of a current distribution for a fifth mode of resonance for the antenna assembly shown in FIG. 17;

fig. 20 is a schematic current distribution diagram for a fifth mode of resonance for the antenna assembly shown in fig. 18;

fig. 21 is a schematic view of an antenna assembly provided in accordance with yet another embodiment of the present application;

fig. 22 is a perspective view of an electronic device according to an embodiment of the present application;

FIG. 23 is a cross-sectional view taken along line I-I of FIG. 22, according to one embodiment;

FIG. 24 is a top view of a conductive frame according to one embodiment of the present application;

FIG. 25 is a top view of a conductive frame in another embodiment of the present application;

fig. 26 is a schematic diagram illustrating positions of a first radiator and a second radiator on an electronic device according to an embodiment;

figure 27 is a schematic diagram of the upper hemispherical efficiency of the antenna assembly shown in figure 1.

Main element numbers:

the electronic device 1, the antenna assembly 10, the first antenna 110, the first radiator 111, the first ground 1111, the first free end 1112, the first matching circuit M1, the first signal source S1, the third radiator 113, the second antenna 120, the second radiator 121, the second ground 1211, the second free end 1212, the coupling end surface 121a, the second matching circuit M2, the frequency-selective filter sub-circuit 1221, the first inductor L1, the first capacitor C1, the second capacitor C2, the switch 1222, the band-pass sub-circuit 1223, the second capacitor C2, the third inductor L3, the second signal source S2, the tuning sub-circuit 1224, the first tuning unit M1, the second tuning unit M2, the third tuning unit M3, the first sub-current I1, the second sub-current I2, the third sub-current I3, the fourth sub-current I4, the fifth sub-current I5, the sixth sub-current I6, the first conductive frame body 210, the second conductive frame 230, the conductive frame section 230, middle frame 30, screen 40, circuit board 50, battery cover 60, top 1a, bottom 1b, first side 11, second side 12, third side 13, fourth side 14.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present disclosure.

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

The present application provides an antenna assembly 10. The antenna assembly 10 may be applied to an electronic device 1 (see fig. 22), where the electronic device 1 includes, but is not limited to, a device having a communication function, such as a mobile phone, an internet device (MID), an electronic book, a Portable Player Station (PSP), or a Personal Digital Assistant (PDA).

Referring to fig. 1, fig. 1 is a schematic diagram of an antenna element according to an embodiment of the present application. The antenna assembly 10 includes a first antenna 110 and a second antenna 120. The first antenna 110 includes a first radiator 111, a first matching circuit M1, and a first signal source S1. The first radiator 111 has a first ground 1111 and a first free end 1112. The first ground 1111 is grounded, and the first signal source S1 is electrically connected to the first radiator 111 through the first matching circuit M1. The second antenna 120 includes a second radiator 121, a second matching circuit M2, and a second signal source S2. The second radiator 121 has a second ground 1211 and a second free end 1212. The second ground 1211 is grounded, the second free end 1212 and the first free end 1112 are spaced apart from each other to form a coupling slot 120a, the second radiator 121 is coupled to the first radiator 111 through the coupling slot 120a, and the second signal source S2 is electrically connected to the second matching circuit M2 and the second radiator 121. The first antenna 110 is configured to support a first frequency band and a second frequency band, and the second antenna 120 is configured to support a third frequency band.

Furthermore, it should be noted that the terms "first", "second", and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing different objects and are not used for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The first radiator 111 is a Flexible Printed Circuit (FPC) antenna radiator, or a Laser Direct Structuring (LDS) antenna radiator, or a Print Direct Structuring (PDS) antenna radiator, or a metal stub.

The first signal source S1 is used to generate a radio frequency signal, and for convenience of description, the radio frequency signal generated by the first signal source S1 is named as a first radio frequency signal.

One end of the first matching circuit M1 is electrically connected to the first radiator 111, and the other end of the first matching circuit M1 is electrically connected to the first signal source S1, for loading the first rf signal to the first radiator 111. The first radiator 111 has a connection point, and for convenience of description, the connection point of the first radiator 111 is named as a connection point a. One end of the first matching circuit M1 is electrically connected to the connection point a of the first radiator 111. The first matching circuit M1 is configured to adjust an equivalent electrical length of the first antenna 110, so that the first antenna 110 supports transceiving of electromagnetic wave signals in the first frequency band and the second frequency band.

The second radiator 121 is an FPC antenna radiator, or an LDS antenna radiator, or a PDS antenna radiator, or a metal stub. In one embodiment, the type of the first radiator 111 is the same as the type of the second radiator 121; in other embodiments, the type of the first radiator 111 may be different from the type of the second radiator 121, which is not limited in this application.

The second signal source S2 is used to generate a radio frequency signal, and for convenience of description, the radio frequency signal generated by the second signal source S2 is named as a second radio frequency signal.

One end of the second matching circuit M2 is electrically connected to the second radiator 121, and the other end of the second matching circuit M2 is electrically connected to the second signal source S2, so as to load the second radio frequency signal to the second radiator 121. The second radiator 121 has a connection point, and for convenience of description, the connection point of the second radiator 121 is named as a connection point B. One end of the second matching circuit M2 is electrically connected to the connection point B of the second radiator 121. The second matching circuit M2 is configured to adjust an equivalent electrical length of the second antenna 120, so that the second antenna 120 supports transceiving of electromagnetic wave signals in the third frequency band. The specific structure of the second matching circuit M2 will be described in detail later.

In the antenna assembly 10 according to the embodiment of the present application, the second free end 1212 and the first free end 1112 are disposed at an interval and form a coupling slot 120a, so that the first antenna 110 can utilize not only the first radiator 111 but also the second radiator 121 during operation, so that the first antenna 110 can support the first frequency band and the second frequency band, and therefore, the antenna assembly 10 has a better communication effect. Accordingly, the second antenna 120 can utilize not only the second radiator 121 but also the first radiator 111 when operating. In other words, the first antenna 110 and the second antenna 120 are common-aperture antennas. In the antenna assembly 10 according to the present embodiment, when the frequency band of the electromagnetic wave signal transmitted and received by the first antenna 110 is constant, the length of the first radiator 111 of the first antenna 110 is shorter than that when the first antenna 110 is operated, only the first radiator 111 can be used, and the second radiator 121 cannot be used. In addition, when the frequency band of the electromagnetic wave signal transmitted and received by the second antenna 120 is constant, the length of the second radiator 121 of the second antenna 120 in the antenna assembly 10 according to the embodiment of the present invention is shorter than that when the second antenna 120 is operated, only the second radiator 121 is used, and the first radiator 111 cannot be used. Therefore, the length of each of the first radiator 111 and the second radiator 121 in the antenna assembly 10 provided by the embodiments of the present application is shorter, and the volume of the antenna assembly 10 is smaller and the occupied space is smaller. When the antenna assembly 10 is used in an electronic device 1, it is convenient to arrange with other devices in the electronic device 1.

In one embodiment, the dimension d of the coupling gap 120a between the first radiator 111 and the second radiator 121 is: d is more than or equal to 0.5mm and less than or equal to 2.0 mm. The size of the coupling slot 120a refers to a size of the coupling slot 120a in the arrangement direction of the first radiator 111 and the second radiator 121. Referring specifically to fig. 1, the dimension d is illustrated in fig. 1. The size d of the gap between the first radiator 111 and the second radiator 121 is selected to be within the above range, so that a good coupling effect between the first radiator 111 and the second radiator 121 can be ensured. Further optionally, d is greater than or equal to 0.5mm and less than or equal to 1.5mm, so that the coupling between the first radiator 111 and the second radiator 121 is higher and better. It should be understood that the coupling slot 120a between the first radiator 111 and the second radiator 121 may not be the above value, as long as the first radiator 111 and the second radiator 121 can be coupled through the coupling slot 120 a.

In an embodiment, the first frequency Band is a Medium High Band (MHB) frequency Band, the second frequency Band is an Ultra High Band (UHB) frequency Band, and the third frequency Band is a GPS-L5 frequency Band.

In another embodiment, the first Band is a low frequency Band (LB) Band, and the second Band is an MHB Band. In yet another embodiment, the first frequency band is an LB frequency band and the second frequency band is a UHB frequency band.

The range of the LB frequency band is a frequency band lower than 1000 MHz. The range of the MHB frequency band is 1000MHz-3000MHz, and the range of the UHB frequency band is 3000MHz-6000 MHz. It should be noted that the GPS mentioned herein refers to Positioning, including but not limited to Global Positioning System (GPS) Positioning, beidou Positioning, GLONASS Positioning, GALILEO Positioning, and the like. The resonance frequency point of the GPS-L5 frequency band is 1176 MHz.

Referring to fig. 1 and fig. 2 together, fig. 2 is a schematic diagram of a second matching circuit provided in one embodiment of fig. 1. The second radiator 121 has a connection point B. The second matching circuit M2 includes a frequency-selecting filter sub-circuit 1221, one end of the frequency-selecting filter sub-circuit 1221 is electrically connected to the connection point B, and the other end is grounded, the frequency-selecting filter sub-circuit 1221 is a band-stop circuit of the third frequency band and is a band-pass circuit of the second frequency band.

The first signal source S1 is loaded to the first radiator 111 through the first matching circuit M1, so that the first antenna 110 supports a first frequency band and a second frequency band. When the antenna assembly 10 is loaded with the second signal source S2, the second antenna 120 is not only enabled to support the third frequency band, but also disabled from affecting at least one of the first frequency band and the second frequency band in which the first antenna 110 is originally operating. Therefore, the second matching circuit M2 needs to be designed.

In the embodiment of the present application, the second matching circuit M2 includes a frequency-selective filtering sub-circuit 1221, the frequency-selective filtering sub-circuit 1221 is a band-stop circuit of the third frequency band, and is a band-pass circuit of the second frequency band, so that the second signal source S2 is added to the antenna assembly 10, which not only enables the second antenna 120 to support the third frequency band, but also does not affect the second frequency band in which the first antenna 110 originally works, so that the antenna assembly 10 provided by the embodiment of the present application has better communication performance. When the first frequency Band is a medium-High frequency (MHB) frequency Band, the second frequency Band is an Ultra High Band (UHB) frequency Band, and the third frequency Band is a GPS-L5 frequency Band, the antenna assembly 10 has a better performance in the MHB + UHB frequency Band and a better performance in the GPS-L5 frequency Band.

Referring to fig. 3, fig. 3 is a schematic circuit diagram of an embodiment of the frequency selective filter sub-circuit shown in fig. 2. In one embodiment, the frequency-selective filter sub-circuit 1221 includes a first inductor L1, a first capacitor C1, and a second inductor L2. One end of the first inductor L1 is electrically connected to the connection point. The first capacitor C1 is connected in parallel with the first inductor L1. One end of the second inductor L2 is electrically connected to the node of the first capacitor C1 connected in parallel with the first inductor L1, and the other end is grounded.

The frequency-selective filter sub-circuit 1221 presents different impedance characteristics to different frequency bands, and the parallel circuit of the first capacitor C1 and the first inductor L1 forms a band stop to the third frequency band, that is, presents a high impedance to the third frequency band. The first inductor L1, the first capacitor C1 and the second inductor L2 form a band pass for the second frequency band, that is, have low impedance to electromagnetic wave signals of the second frequency band. The frequency-selective filter sub-circuit 1221 (in this embodiment, the first inductor L1, the first capacitor C1, and the second inductor L2) presents a capacitance to the first frequency band.

Referring to fig. 1 and 4 together, fig. 4 is a schematic diagram of a second matching circuit according to another embodiment of fig. 1. The second matching circuit M2 further includes a switch 1222. The other end of the frequency-selective filter sub-circuit 1221 is grounded through the switch 1222. In the schematic diagram of the present embodiment, the second matching circuit M2 is exemplified to further include a switch 1222 coupled to the frequency-selective filtering sub-circuit 1221 including the first inductor L1, the first capacitor C1, and the second inductor L2, and it should be understood that the second matching circuit M2 in the antenna assembly 10 provided in the present application should not be limited.

As can be seen from the foregoing description, the frequency-selective filter sub-circuit 1221 (in this embodiment, the first inductor L1, the first capacitor C1, and the second inductor L2) presents a capacitance to the first frequency band. Compared with the second matching circuit M2 without the frequency-selective filter sub-circuit 1221, the frequency-selective filter sub-circuit 1221 is disposed in the second matching circuit M2, and the frequency-selective filter sub-circuit 1221 presents a capacitor to the first frequency band, which may cause a performance degradation of the first frequency band, in order to maintain the performance of the first frequency band, a switch 1222 is disposed in the second matching circuit M2, and the other end of the frequency-selective filter sub-circuit 1221 is grounded through the switch 1222, so as to maintain a small performance degradation or even no performance degradation of the first frequency band.

When the switch 1222 is in an open state, the first antenna 110 supports a first sub-band and a second sub-band in a first frequency band, wherein the frequency of the first sub-band is less than the frequency of the second sub-band. In other words, when the first signal source S1 operates in the first frequency band, the switch 1222 is in an open state.

When the switch 1222 is in a closed state, the first antenna 110 supports the first antenna 110 for at least a first sub-band of the first frequency band.

When the switch 1222 is in the closed state, the first antenna 110 supports the first antenna 110 at least for a first sub-band of the first frequency band, including: the first antenna 110 supports a first sub-band in the first frequency band and does not support a second sub-band in the first frequency band; or, the first antenna 110 supports a first sub-band in the first frequency band, and the first antenna 110 supports a second sub-band in the first frequency band.

The first antenna 110 supports a first sub-band of the first frequency band and does not support a second sub-band of the first frequency band, in other words, the switch 1222 is in a closed state when the first signal source S1 operates in the first sub-band.

In another embodiment, when the switch 1222 is in the closed state, the second radiator 121 enables the first antenna 110 to support the first sub-band in the first frequency band and whether to support the second sub-band in the first frequency band according to a preset size parameter. For example, when the equivalent electrical length of the second radiator 121 is L1, when the switch 1222 is in the closed state, the first antenna 110 supports the first sub-band in the first frequency band and does not support the second sub-band in the first frequency band. When the equivalent electrical length of the second radiator 121 is L2, when the switch 1222 is in a closed state, the first antenna 110 supports a first sub-band in the first frequency band and supports a second sub-band in the first frequency band, where L2 < L1.

In this embodiment, the first sub-Band is a Middle frequency Band (MB) Band, and the second sub-Band is a HB (High Band, HB) Band. The MB is 1000-2200MHz, such as the B3 band or the B1 band. The HB band ranges from 2200-3000MHz, such as the B40 band, or B41.

It should be noted that, no matter the switch 1222 is in the closed state or the open state, the third frequency band exists, and the resonant frequency point of the third frequency band is unchanged or slightly changed, so when the frequency selection filter sub-circuit 1221 includes the first inductor L1, the first capacitor C1, and the second inductor L2, the band rejection circuits of the first capacitor C1 and the first inductor L1 isolate the third frequency band.

Referring to fig. 5, fig. 5 is a schematic diagram of a second matching circuit according to another embodiment of fig. 1. The second matching circuit M2 further comprises a bandpass sub-circuit 1223. The second matching circuit M2 further comprises a band pass sub-circuit 1233 which may be incorporated into any of the previously described embodiments of the second matching circuit M2. In the schematic diagram of this embodiment, the structure of the second matching circuit M2 should not be construed as limiting the second matching circuit M2 provided in the embodiments of the present application. One end of the band-pass sub-circuit 1223 is electrically connected to the connection point B, and the other end of the band-pass sub-circuit 1223 is electrically connected to the second signal source S2, where the band-pass sub-circuit 1223 is a band-pass circuit of the third frequency band.

The band pass sub-circuit 1223 is a band pass circuit of the third frequency band, that is, the band pass sub-circuit presents a low impedance to the third frequency band, and presents a high impedance to other frequency bands (in this embodiment, the first frequency band and the second frequency band), so as to isolate the other frequency bands. The antenna assembly 10 provided by the embodiment of the application has better communication performance.

Referring to fig. 5 and fig. 6 together, fig. 6 is a circuit structure diagram of the bandpass sub-circuit provided in one embodiment of fig. 5. In one embodiment, the band pass sub-circuit 1223 includes a second capacitor C2 and a third inductor L3, and the second capacitor C2 is connected in series with the third inductor L3.

Referring to fig. 5 and 7 together, fig. 7 is a circuit structure diagram of the band-stop sub-circuit provided in one embodiment of fig. 5. The band-pass sub-circuit 1223 comprises a second capacitor C2 and a third inductor L3, and the second capacitor C2 is connected in parallel with the third inductor L3.

Referring to fig. 1 and 8 together, fig. 8 is a schematic diagram of a second matching circuit according to another embodiment of fig. 1. The second matching circuit M2 further comprises a tuning sub-circuit 1224. The tuning subcircuit 1224 is configured to tune a resonance point of the third frequency band.

The second matching circuit M2 further comprises a tuning sub-circuit 1224 that can be incorporated into any of the previously described embodiments of the second matching circuit M2. In the schematic diagram of this embodiment, the structure of the second matching circuit M2 should not be construed as limiting the second matching circuit M2 provided in the embodiments of the present application.

The resonance point is also called a resonance frequency point. The tuning subcircuit 1224 is configured to tune a resonance point of the third frequency band such that the antenna assembly 10 has a better communication quality in the third frequency band.

Referring to fig. 8 and 9 together, fig. 9 is a schematic diagram of a tuning sub-circuit provided in one embodiment of fig. 8. The tuning sub-circuit 1224 includes a first tuning element m 1. One end of the first tuning unit m1 is electrically connected to the second signal source S2, and the other end is electrically connected to the connection point B. In the present embodiment, the other end of the first tuning unit m1 is indirectly electrically connected to the connection point B.

Referring to fig. 8 and 10 together, fig. 10 is a schematic diagram of a tuning sub-circuit according to another embodiment of fig. 8. The tuning subcircuit 1224 also includes at least one of a second tuning unit m2 and a third tuning unit m 3. When the tuning sub-circuit 1224 includes the second tuning unit m2, one end of the second tuning unit m2 is grounded, and the other end is electrically connected to the other end of the first tuning unit m 1. When the tuning sub-circuit 1224 includes the third tuning unit m3, one end of the third tuning unit m3 is grounded, and the other end of the third tuning unit m3 is electrically connected to the second signal source S2.

In other words, the tuning subcircuit 1224 includes at least one of a second tuning unit m2 and a third tuning unit m3, including: the tuning subcircuit 1224 includes a second tuning element m2 and does not include a third tuning element m 3; alternatively, the tuning sub-circuit 1224 includes the third tuning unit m3 and does not include the second tuning unit m 2; alternatively, the tuning sub-circuit 1224 includes a second tuning element m2 and includes a third tuning element m 3. In the schematic diagram of the present embodiment, the tuning sub-circuit 1224 further includes the second tuning unit m2 and the third tuning unit m3, which should not be construed as a limitation to the tuning sub-circuit 1224 provided in the embodiments of the present application.

Specifically, the first tuning element m1 includes a capacitance; when the tuning sub-circuit 1224 includes the second tuning element m2, the second tuning element m2 includes a capacitance or an inductance; when the tuning sub-circuit 1224 includes the third tuning unit m3, the third tuning unit m3 includes a capacitance or an inductance.

Referring to fig. 10, in the present embodiment, the second matching circuit M2 is illustrated as including a frequency-selecting filter sub-circuit 1221, a switch 1222, a band-pass sub-circuit 1223, and a tuning sub-circuit 1224. In addition, the frequency-selecting sub-circuit comprises a first inductor L1, a first capacitor C1 and a second inductor L2; the band-pass sub-circuit 1223 comprises a second capacitor C2 and a third inductor L3 which are connected in series; and the tuning sub-circuit 1224 includes a first tuning unit m1, a second tuning unit m2, and a third tuning unit m 3.

In this embodiment, the inductance value of the first inductor L1 is equal to 30nH, the capacitance value of the first capacitor C1 is equal to 0.8pF, the inductance value of the second inductor L2 is equal to 1.8nH, the inductance value of the third inductor L3 is equal to 12nH, the capacitance value of the second capacitor C2 is equal to 1.5pF, the capacitance value of the first tuning unit m1 is equal to 1.2 pF; the second tuning unit m2 is a capacitor, and the capacitance value is equal to 1.5 pF; the third tuning unit m3 is a capacitor, and the capacitance of the third resting unit m3 is 1.5 pF.

Next, the respective resonance modes of the first antenna 110 will be described. Referring to fig. 11, fig. 11 is a schematic diagram of S-parameters of the first antenna and the second antenna when the switch of the antenna assembly is in an off state. In this diagram, the abscissa is frequency, in GHz; the ordinate is the S parameter in dB. Curve (r) is the S11 curve for the first antenna 110; curve two is the S11 curve for the second antenna 120; curve c is the S21 isolation curve for the first antenna 110 and the second antenna 120. When the switch 1222 is in an off state, the first antenna 110 has a first resonant mode, a second resonant mode and a third resonant mode, wherein the first resonant mode is used for supporting a first sub-band of the first frequency band, the second resonant mode is used for supporting a second sub-band of the first frequency band, and the third resonant mode is used for supporting the second frequency band.

The resonant mode is also called a resonant mode. As can be seen from the curve, the first antenna 110 has a first resonant mode, a second resonant mode, and a third resonant mode. For convenience of illustration in the figure, the first resonance mode is abbreviated as mode 1, the second resonance mode is abbreviated as mode 2, and the third resonance mode is abbreviated as mode 3. As can be seen from the curve (i), the first resonance mode is used to support a first frequency sub-band (in this embodiment, MB, for example, B3 frequency band), the second resonance mode is used to support a second frequency sub-band (in this embodiment, HB, for example, B41 frequency band) of the first frequency band, and the third resonance mode is used to support the second frequency band (in this embodiment, UHB, for example, N78).

It can be seen from the curve (ii), that the second antenna 120 operates in a third frequency band, which is a GPS-L5 frequency band in this embodiment.

As can be seen from the curve c, the first antenna 110 and the second antenna 120 have better isolation.

The length from the first ground terminal 1111 to the coupling slot 120a is 1/4 wavelengths of a resonance frequency point corresponding to the first resonance mode; alternatively, the length from the first ground terminal 1111 to the coupling slot 120a is about 1/4 wavelengths of the resonant frequency point corresponding to the first resonant mode.

In other words, the first resonant mode corresponding to the first sub-band is 1/4 wavelength mode from the first ground terminal 1111 to the coupling slot 120 a; alternatively, the first resonance mode corresponding to the first sub-band is about 1/4 wavelength mode from the first ground terminal 1111 to the coupling slot 120 a.

The length from the second ground terminal 1211 to the coupling slot 120a is 1/4 wavelengths of a resonance frequency point corresponding to the second resonance mode; alternatively, the length from the second ground terminal 1211 to the coupling slot 120a is about 1/4 wavelengths of the resonant frequency point corresponding to the second resonant mode.

In other words, the second resonance mode corresponding to the second sub-band is the 1/4 wavelength mode from the second ground 1211 to the coupling slot 120 a; alternatively, the second resonant mode corresponding to the second sub-band is about 1/4 wavelength mode from the second ground 1211 to the coupling slot 120 a.

The second antenna 120 operates in a third frequency band, which in this embodiment is the GPS-L5 frequency band. The resonant mode corresponding to the third frequency band is 1/8-1/4 wavelength modes from the second ground 1211 to the coupling slot 120 a.

Referring to fig. 12, fig. 12 is a schematic diagram of S parameters of the first antenna and the second antenna when the switch of the antenna assembly is in the closed state. In this diagram, the abscissa is frequency, in GHz; the ordinate is the S parameter in dB. Curve (r) is the S11 curve for the first antenna 110; curve two is the S11 curve for the second antenna 120; curve c is the S21 isolation curve for the first antenna 110 and the second antenna 120.

When the switch 1222 is in a closed state, the first antenna 110 has a first resonant mode, a second resonant mode, a fourth resonant mode and a fifth resonant mode, wherein the first resonant mode and the second resonant mode both support at least a first sub-band (MB in this embodiment) in the first frequency band, and the fourth resonant mode and the fifth resonant mode both support the second frequency band (UHB in this embodiment).

As can be seen from the curve, the first antenna 110 has a first resonant mode, a second resonant mode, a fourth resonant mode and a fifth resonant mode. For convenience of illustration in the figure, the first resonance mode is abbreviated as mode 1, the second resonance mode is abbreviated as mode 2, the fourth resonance mode is abbreviated as mode 4, and the fifth resonance mode is abbreviated as mode 5. As can be seen from the curve, the first resonance mode and the second resonance mode both support the first sub-band in the first frequency band, and the fourth resonance mode and the fifth resonance mode both support the second frequency band (UHB in this embodiment). The supported frequency bands for the fourth and fifth resonant modes are 3.3GHz-4.2GHz, i.e., N77 and N78 in UHB.

The length from the first signal source S1 to the coupling slot 120a is 1/4 wavelengths of a resonance frequency point corresponding to the fourth resonance mode; alternatively, the length from the first signal source S1 to the coupling slot 120a is about 1/4 wavelengths of the resonant frequency band corresponding to the fourth resonant mode.

In other words, the fourth resonant mode is a 1/4 wavelength mode of the first signal source S1 to the coupling slot 120 a; alternatively, the fourth resonant mode is a 1/4 wavelength mode of the first signal source S1 to the coupling slot 120 a.

The length from the second signal source S2 to the coupling slot 120a is 1/4 wavelengths of a resonance frequency point corresponding to the fifth resonance mode; or the length from the second signal source S2 to the coupling slot 120a is about 1/4 wavelengths of the resonance frequency point corresponding to the fifth resonance mode.

In other words, the fifth resonance mode is a 1/4 wavelength mode of the second signal source S2 to the coupling slot 120 a; alternatively, the fifth resonant mode is approximately 1/4 wavelength mode of the second signal source S2 to the coupling slot 120 a.

As can be seen from fig. 11, when the switch 1222 is in the off state, the resonance frequency point of the second resonance mode is 2.6 GHz; as can be seen from fig. 12, when the switch 1222 is in the closed state, the resonant frequency point of the second resonant mode is 2.3GHz, and therefore, compared with the second resonant mode in fig. 11, the resonant frequency point of the resonant mode in fig. 12 is shifted lower, which improves the performance of the first sub-band (in this embodiment, the MB band). Specifically, as can be seen from fig. 11, when the switch 1222 is in the open state, the first resonance mode covers the first sub-band (in this embodiment, the MB band) in the first frequency band, and the second resonance mode covers the second sub-band (in this embodiment, the HB band) in the first frequency band. As can be seen from fig. 12, when the switch 1222 is in the closed state, the first resonance mode and the second resonance mode both cover a first sub-band (in this embodiment, an MB band) in the first frequency band.

In another embodiment, when the switch 1222 is in the closed state, the second radiator 121 enables the first antenna 110 to support the first sub-band in the first frequency band and whether to support the second sub-band in the first frequency band according to a preset size parameter. For example, when the equivalent electrical length of the second radiator 121 is L01, when the switch 1222 is in the closed state, the first antenna 110 supports the first sub-band in the first frequency band and does not support the second sub-band in the first frequency band. When the equivalent electrical length of the second radiator 121 is L02, when the switch 1222 is in a closed state, the first antenna 110 supports a first sub-band in the first frequency band and supports a second sub-band in the first frequency band, where L02 < L01.

The main current distribution in each resonant mode is described below. It should be noted that the main current distribution in each of the following resonant modes does not represent the entire current distribution in each of the resonant modes. The current at the main current distribution in each resonance mode is larger, while in other parts, it does not mean that there is no current distribution, but the current distribution is smaller. In addition, it should be noted that, since the current distribution of the first antenna 110 in the first resonant mode, the second resonant mode, the third resonant mode, the fourth resonant mode and the fifth resonant mode is considered, the electrical connection of the second radiator 121 to the second signal source S2 through the second matching circuit M2 may be equivalent to the electrical connection of the second radiator 121 to the ground through the second matching circuit M2.

Referring to fig. 13, fig. 13 is a schematic diagram of current distribution corresponding to a first resonant mode in an antenna assembly according to an embodiment. The first resonance mode in this embodiment corresponds to a case when the switch 1222 in the second matching circuit M2 is turned on or the switch 1222 is turned off or the second matching circuit M2 does not include the switch 1222. When the first antenna 110 resonates in the first resonant mode, the first resonant mode corresponds to a current: from the second ground 1211 to the second free end 1212, from the second free end 1212 to the first free end 1112 through the coupling slot 120a, and from the first free end 1112 to the first ground 1111.

Referring to fig. 14, fig. 14 is a schematic diagram illustrating a current distribution corresponding to a second resonant mode in an antenna assembly according to an embodiment. The first resonance mode in this embodiment corresponds to a case when the switch 1222 in the second matching circuit M2 is turned on or the switch 1222 is turned off or the second matching circuit M2 does not include the switch 1222. The current corresponding to the second resonance mode is as follows: from the first signal source S1 to the connection point of the first radiator 111 and the first matching circuit M1, and flows to the first free end 1112, from the first free end 1112 to the second free end 1212 through the coupling slot 120a, and from the second free end 1212 to the second ground 1211.

Referring to fig. 15, fig. 15 is a schematic diagram illustrating a current distribution corresponding to a third resonant mode in an antenna element according to an embodiment. The currents corresponding to the third resonant mode include a first sub-current I1 and a second sub-current I2. The first sub-current I1 flows from the first ground terminal 1111 to the first free terminal 1112. The second sub-current I2 flows from the second ground terminal 1211 to the second free terminal 1212.

Referring to fig. 16, fig. 16 is a schematic diagram illustrating a current distribution corresponding to a fourth resonant mode in an antenna assembly according to an embodiment. The current flow direction corresponding to the fourth resonance mode is as follows: flows from the first signal source S1 to the first free end 1112 through the first matching circuit M1, the connection point of the first matching circuit M1 and the first radiator 111, flows to the second free end 1212 through the first free end 1112 and the coupling slot 120a, and flows to the connection point of the second radiator 121, the second matching circuit M2 and the ground through the second free end 1212.

Referring to fig. 17 and 18 in combination with fig. 1, fig. 17 is a schematic diagram of an antenna assembly according to another embodiment of the present application; fig. 18 is a schematic view of an antenna assembly provided in accordance with yet another embodiment of the present application. The distance d1 between the connection point B of the second radiator 121 and the second free end 1212 satisfies: d1 is more than or equal to 0 and less than or equal to L/2. In other words, the second radiator 121 has a coupling end surface 121a facing the first free end 1112, and a distance d1 between the connection point B of the second radiator 121 and the coupling end surface 121a satisfies: d1 is greater than or equal to 0 and less than or equal to L/2, wherein L is the length of the second radiator 121.

In fig. 1, a distance d1 between the connection point B of the second radiator 121 and the coupling end surface 121a satisfies: 0 < d1 < L/2, for example, d1 ═ L/3. In fig. 17, d1 is L/2. In fig. 18, d1 is 0.

Referring to fig. 17 and 19 together, fig. 19 is a schematic diagram illustrating a current distribution of a fifth resonant mode corresponding to the antenna element shown in fig. 17. When the distance d1 between the connection point of the second radiator 121 and the coupling end surface 121a is equal to L/2, the currents corresponding to the fifth resonant mode include a third sub-current I3 and a fourth sub-current I4. The third sub-current I3 flows from the first signal source S1 to the first free end 1112 through the first matching circuit M1, the connection current of the first matching circuit M1 and the first radiator 111. The fourth sub-current I4 flows from the connection point of the second matching circuit M2, the second matching circuit M2 and the second radiator 121 to the second free end 1212.

When the distance d1 between the connection point of the second radiator 121 and the coupling end surface 121a is L/3, the current corresponding to the fifth resonant mode includes the third sub-current I3 and the fourth sub-current I4, and the description of the third sub-current I3 and the fourth sub-current I4 refers to the foregoing description, which is not repeated herein. In other words, a current distribution corresponding to the fifth resonance mode when the distance d1 between the connection point of the second radiator 121 and the coupling end surface 121a is L/3 is the same as a current distribution corresponding to the fifth resonance mode when the distance d1 between the connection point of the second radiator 121 and the coupling end surface 121a is L/2.

Referring to fig. 18 and 20 together, fig. 20 is a schematic diagram illustrating a current distribution of a fifth resonant mode corresponding to the antenna element shown in fig. 18. When the distance d1 between the connection point of the second radiator 121 and the coupling end surface 121a is equal to 0, the currents corresponding to the fifth resonant mode include a fifth sub-current I5 and a sixth sub-current I6. The fifth sub-current I5 flows from the second matching circuit M2 to the connection point B of the second radiator 121 and flows from the connection point B toward the second ground 1211. The sixth sub-current I6 flows from the second ground 1211 toward the first free end 1112.

For convenience of description, the current corresponding to the fifth resonance mode is named as a first distribution mode by a current distribution mode including a third sub-current I3 and a fourth sub-current I4; the current corresponding to the fifth resonance mode is named as a second distribution mode by a current distribution mode including a fifth sub-current I5 and a sixth sub-current I6.

It can be understood that, when the distance D1 between the connection point of the second radiator 121 and the coupling end surface 121a is D, the switching point is a first distribution mode and a second distribution mode, where 0 < D1 < L/3. When D1 is more than or equal to 0 and less than D, the current distribution of the fifth resonance mode is a second distribution mode; when D is less than or equal to D1 and less than or equal to L/2, the current distribution of the fifth resonance mode is a first distribution mode.

The second radiator 121 has a coupling end surface 121a facing the first free end 1112, and a distance d1 between the connection point B of the second radiator 121 and the coupling end surface 121a satisfies: d1 is greater than or equal to 0 and less than or equal to L/2, so that the position layout of the connection point B of the second signal source S2 and the second matching circuit M2 to the second radiator 121 is more flexible. When the antenna assembly 10 is applied to the electronic device 1, the antenna assembly is convenient to combine with other devices in the electronic device 1 and arrange.

In this embodiment, by setting the position of the connection point B on the second radiator 121, the third frequency sub-band (in this embodiment, the N77 frequency band) and the fourth frequency sub-band (in this embodiment, the N78 frequency band) in the second frequency band (in this embodiment, the UHB frequency band) are realized. In this embodiment, the frequency ranges of the N77 frequency band and the N78 frequency band are: 3.3GHz-4.2 GHz. In other words, the antenna assembly 10 provided in the present embodiment can simultaneously support the N77 band and the N78 band at the same time. In the related art, the active switch 1222 of the antenna assembly 10 is used to switch between the N77 band and the N78 band, but the N77 band and the N78 band cannot be supported at the same time. In addition, in the related art, the full band of N77 cannot be realized, and a part of the N77 band is realized in one time slot and another part of the N77 band is realized in another time slot. Therefore, the antenna assembly 10 in the related art cannot support the N77 band and the N78 band at the same time, and the antenna assembly 10 provided in the embodiment of the present application can simultaneously realize the N77 band and the N78 band by the position of the connection point B, so that a better communication effect is achieved. In addition, the antenna assembly 10 provided by the embodiment of the present application does not need to provide the active switch 1222, the size of the antenna assembly 10 is small, the occupied space is small, and when the antenna assembly 10 is applied to the electronic device 1, the antenna assembly is convenient to combine with other devices and arrange in the electronic device 1. In addition, the antenna assembly 10 provided in the present application can achieve the full frequency bands of the N77 frequency band and the N78 frequency band, and therefore, the antenna assembly 10 provided in the present application has better communication effects in the N77 frequency band and the N78 frequency band.

Referring to fig. 21, fig. 21 is a schematic diagram of an antenna assembly according to another embodiment of the present application. In this embodiment, the first antenna 110 further includes a third radiator 113. The third radiator 113 is electrically connected to the first matching circuit M1, and the third radiator 113 is configured to support the second frequency band or a fourth frequency band, where the fourth frequency band is different from any one of the first frequency band, the second frequency band, and the third frequency band.

The first antenna 110 further includes a third radiator 113, which may be incorporated into the antenna assembly 10 provided in any of the foregoing embodiments, and the schematic diagram of the present embodiment illustrates that the first antenna 110 further includes the third radiator 113 incorporated into the schematic diagram of the antenna assembly 10 provided in the foregoing embodiment, and it should be understood that the present application is not limited to the antenna assembly 10 provided in this application.

The third radiator 113 is a Flexible Printed Circuit (FPC) antenna radiator, or a Laser Direct Structuring (LDS) antenna radiator, or a Print Direct Structuring (PDS) antenna radiator, or a metal stub.

In this embodiment, it is illustrated that the third radiator 113 is configured to support the second frequency band, for example, the third radiator 113 is configured to support an N79 frequency band in the second frequency band (in this embodiment, the UHB frequency band).

In other embodiments, the third radiator 113 is configured to support the fourth frequency band, where the fourth frequency band is different from any one of the first frequency band, the second frequency band, and the third frequency band.

In this embodiment, by providing the third radiator 113, the antenna assembly 10 can support more frequency bands, so that the antenna assembly 10 has better communication performance.

The present application further provides an electronic device 1, where the electronic device 1 includes, but is not limited to, a device having a communication function, such as a mobile phone, an internet device (MID), an electronic book, a Portable Player Station (PSP), or a Personal Digital Assistant (PDA). Referring to fig. 22 and 23, fig. 22 is a perspective structural view of an electronic device according to an embodiment of the present disclosure; FIG. 23 is a cross-sectional view taken along line I-I of FIG. 22, according to one embodiment. The electronic device 1 comprises an antenna assembly 10 according to any of the preceding embodiments.

Referring to fig. 22, 23, 24 and 25 together, fig. 24 is a top view of a conductive frame according to an embodiment of the present disclosure; fig. 25 is a top view of a conductive frame in another embodiment of the present application. The electronic device 1 further comprises a conductive frame 20. The conductive frame 20 includes a frame body 210, a first conductive segment 220, and a second conductive segment 230. The first conductive segment 220 and the second conductive segment 230 are spaced apart from each other, the first conductive segment 220 and the second conductive segment 230 respectively have a gap between the frame body 210, an end of the first conductive segment 220 away from the second conductive segment 230 is connected to the frame body 210, an end of the second conductive segment 230 away from the first conductive segment 220 is connected to the frame body 210, wherein the first radiator 111 includes the first conductive segment 220, and the second radiator 121 includes the second conductive segment 230. In fig. 24, the first conductive segment 220 and the second conductive segment 230 are illustrated as corresponding to the sides of the frame body 210; in fig. 25, the first conductive segment 220 and the second conductive segment 230 are illustrated as corresponding to corners of the frame body 210.

In the present embodiment, the conductive frame 20 is a metal frame, and for example, the material of the conductive frame 20 may include aluminum magnesium alloy, aluminum, copper, or the like. Since a larger piece of metal may constitute a ground, the frame body 210 may constitute the ground, and an end of the first conductive segment 220 away from the second conductive segment 230 is connected to the frame body 210, so that the first conductive segment 220 is grounded; an end of the second conductive segment 230 facing away from the second conductive segment 230 is connected to the frame body 210, so that the second conductive segment 230 is grounded.

Referring to fig. 23 again, the conductive frame body 20 includes a frame 240, the frame 240 is connected to the periphery of the frame body 210 in a bending manner, and the first conductive segment 220 and the second conductive segment 230 are formed on the frame 240.

In the present embodiment, the conductive housing 20 is the middle frame 30 of the electronic device 1.

The middle frame 30 is made of metal, such as aluminum magnesium alloy. The middle frame 30 generally forms a ground of the electronic device 1, and when the electronic devices in the electronic device 1 need to be grounded, the middle frame 30 can be connected to the ground. In addition, the ground system in the electronic device 1 includes a ground in the circuit board 50 and a ground in the screen 40 in addition to the middle frame 30.

In the present embodiment, the electronic device 1 further includes a screen 40, a circuit board 50, and a battery cover 60. The screen 40 may be a display screen with a display function, or may be a screen integrated with a display function and a touch function. The screen 40 is used for displaying text, images, video and other information. The screen 40 is supported by the middle frame 30 and is located at one side of the middle frame 30. The circuit board 50 is also generally carried by the middle frame 30, and the circuit board 50 and the screen 40 are carried by opposite sides of the middle frame 30. At least one or more of the first signal source S1, the second signal source S2, the first matching circuit M1, and the second matching circuit M2 of the antenna assembly 10 described above may be disposed on the circuit board 50. The battery cover 60 is disposed on a side of the circuit board 50 away from the middle frame 30, and the battery cover 60, the middle frame 30, the circuit board 50, and the screen 40 cooperate with each other to form a complete electronic device 1. It should be understood that the structural description of the electronic device 1 is merely a description of one form of the structure of the electronic device 1, and should not be understood as a limitation on the electronic device 1, nor should it be understood as a limitation on the antenna assembly 10.

In another embodiment, the conductive frame 20 is not the middle frame 30, but may be a conductive frame 20 disposed inside the electronic device 1.

In other embodiments, the first radiator 111 is an FPC antenna radiator, an LDS antenna radiator, a PDS antenna radiator, or a metal branch; the second radiator 121 is an FPC antenna radiator, or an LDS antenna radiator, or a PDS antenna radiator, or a metal stub. The first radiator 111 may be disposed at an edge of the middle frame 30 and electrically connected to the middle frame 30. It is understood that, in other embodiments, the first radiator 111 and the second radiator 121 may be disposed at other positions and electrically connected to a ground system in the electronic device 1 to be grounded. The ground system in the electronic device 1 includes a middle frame 30, a screen 40, and a circuit board 50, and the first radiator 111 and the second radiator 121 are electrically connected to the ground system of the electronic device 1, and include any one or more of the ground of the middle frame 30, the ground of the screen 40, and the ground of the circuit board 50, which are electrically connected to the first radiator 111 and the second radiator 121.

In one embodiment, the first radiator 111 and the second radiator 121 are the same type of antenna radiator and are disposed on the same substrate. The first radiator 111 and the second radiator 121 are of the same type and are disposed on the same substrate, so that the first radiator 111 and the second radiator 121 can be conveniently manufactured and the first radiator 111 and the second radiator 121 can be conveniently assembled with other components in the electronic device 1. In this embodiment, the electronic device 1 further includes a ground system including one or more of the middle frame 30, the ground of the circuit board 50, and the ground of the display screen, the first ground 1111 of the first radiator 111 is electrically connected to the ground system to be grounded, and the second ground 1211 of the second radiator 121 is electrically connected to the ground system to be grounded. In this embodiment, the first radiator 111 is an FPC antenna radiator, or an LDS antenna radiator, or a PDS antenna radiator, or a metal branch; the second radiator 121 is an FPC antenna radiator, or an LDS antenna radiator, or a PDS antenna radiator, or a metal stub, and when the first radiator 111 and the second radiator 121 are not directly formed on the middle frame 30, they need to be electrically connected to a ground system in the electronic device 1.

When the first radiator 111 is electrically connected to the ground of the middle frame 30, the first radiator 111 may be connected to the ground of the middle frame 30 through a connection rib, or the first radiator 111 is electrically connected to the ground of the middle frame 30 through a conductive elastic sheet. Similarly, when the second radiator 121 is electrically connected to the ground of the middle frame 30, the second radiator 121 may be connected to the ground of the middle frame 30 through a connection rib, or the second radiator 121 is electrically connected to the ground of the middle frame 30 through a conductive elastic sheet.

Referring to fig. 26, fig. 26 is a schematic diagram illustrating positions of a first radiator and a second radiator in an electronic device according to an embodiment. In this embodiment, the electronic device 1 includes a top portion 1a and a bottom portion 1b, and the first radiator 111 and the second radiator 121 are both disposed on the top portion 1 a.

The top 1a refers to a portion of the electronic device 1 located above when the electronic device 1 is in use (for example, the electronic device 1 is in a vertical screen state), and the bottom 1b is a portion located below the electronic device 1 opposite to the top 1 a.

The first radiator 111 and the second radiator 121 are disposed on the top portion 1a, and include three conditions: the first radiator 111 and the second radiator 121 are disposed at an upper left corner of the electronic device 1; alternatively, the first radiator 111 and the second radiator 121 are disposed on the top side of the electronic device 1; or the first radiator 111 and the second radiator 121 are disposed at the upper right corner of the electronic device 1.

When the first radiator 111 and the second radiator 121 are disposed at the upper left corner of the electronic device 1, the following situations are included: a portion of the first radiator 111 is located at the left side, another portion of the first radiator 111 is located at the top side, and the second radiators 121 are all located at the top side; or, the second radiator 121 is partially located on the top side, another portion of the second radiator 121 is located on the left side, and the first radiator 111 is located on the left side; alternatively, the first radiator 111 is located at the left side edge, and the second radiator 121 is located at the top edge.

When the first radiator 111 and the second radiator 121 are disposed at the upper right corner of the electronic device 1, the following conditions are included: the first radiator 111 is partially located on the top side, another portion of the first radiator 111 is located on the right side, and the second radiator 121 is located on the right side; alternatively, the second radiator 121 is partially located at the right side, the second radiator 121 is partially located at the top side, and the first radiator 111 is partially located at the top side; alternatively, the first radiator 111 is located on the top side, and the second radiator 121 is located on the right side.

When the electronic device 1 is placed stereoscopically, the top 1a of the electronic device 1 is generally facing away from the ground, while the bottom 1b of the electronic device 1 is generally close to the ground. When the first radiator 111 and the second radiator 121 are disposed on the top portion 1a, the upper hemispherical radiation efficiency of the first antenna 110 and the second antenna 120 is better, so that the first antenna 110 and the second antenna 120 have better communication efficiency. Of course, in other embodiments, the first radiator 111 and the second radiator 121 may be disposed corresponding to the bottom portion 1b of the electronic device 1, and although the upper hemispherical radiation efficiency of the first antenna 110 and the second antenna 120 is not so good when the first radiator 111 and the second radiator 121 are disposed corresponding to the bottom portion 1b of the electronic device 1, the communication effect may be better as long as the upper hemispherical radiation efficiency is greater than or equal to the predetermined efficiency.

Referring to fig. 26, the electronic device 1 of the present embodiment includes a first side 11, a second side 12, a third side 13, and a fourth side 14 connected end to end. The first edge 11 and the third edge 13 are short edges of the electronic device 1, and the second edge 12 and the fourth edge 14 are long edges of the electronic device 1. The first edge 11 and the third edge 13 are arranged back to back at intervals, the second edge 12 and the fourth edge 14 are arranged back to back at intervals, the second edge 12 is respectively connected with the first edge 11 and the third edge 13 in a bent mode, and the fourth edge 14 is respectively connected with the first edge 11 and the third edge 13 in a bent mode. The connection between the first side 11 and the second side 12, the connection between the second side 12 and the third side 13, the connection between the third side 13 and the fourth side 14, and the connection between the fourth side 14 and the first side 11 all form corners of the electronic device 1. In this embodiment, the first side 11 is a top side of the electronic device 1, the second side is a right side of the electronic device 1, the third side is a bottom side of the electronic device 1, and the fourth side is a left side of the electronic device 1. It should be understood that, in this embodiment, the first side 11 and the third side 13 are short sides of the electronic device 1, and the second side 12 and the fourth side 14 are long sides of the electronic device 1, which are taken as an example, and in other embodiments, the first side 11, the second side 12, the third side 13, and the fourth side 14 are equal in length.

Referring to fig. 1 and 27 together, fig. 27 is a schematic diagram of an upper hemispherical efficiency of the antenna assembly shown in fig. 1. The upper hemisphere efficiency ratio in the antenna assembly 10 is above 50%, and in the schematic diagram of the present embodiment the upper hemisphere efficiency ratio in the antenna assembly 10 is 53%. In other words, the upper hemispherical radiation efficiency of the first antenna 110 and the second antenna 120 is better, so that the first antenna 110 and the second antenna 120 have better communication efficiency.

Although embodiments of the present application have been shown and described, it should be understood that they have been presented by way of example only, and not limitation, and that various changes, modifications, substitutions and alterations can be made by those skilled in the art without departing from the scope of the present application, and such improvements and modifications are to be considered as within the scope of the present application.

Claims

1. An antenna assembly, characterized in that the antenna assembly comprises:

the second antenna comprises a second radiator, a second matching circuit and a second signal source, wherein the second radiator is provided with a second grounding end and a second free end, the second grounding end is grounded, the second free end and the first free end are arranged at intervals and form a coupling gap, the second radiator is coupled with the first radiator through the coupling gap, the second signal source is electrically connected with the second matching circuit to the second radiator, the second radiator is also provided with a connecting point, the second matching circuit comprises a frequency-selecting filter sub-circuit and a band-pass sub-circuit, one end of the frequency-selecting filter sub-circuit is electrically connected with the connecting point, the other end of the frequency-selecting filter sub-circuit is grounded, and the frequency-selecting filter sub-circuit is a band-stop circuit of a third frequency band and is a band-pass circuit of a second frequency band; one end of the band-pass sub-circuit is electrically connected with the connection point, the other end of the band-pass sub-circuit is electrically connected with the second signal source, and the band-pass sub-circuit is a band-pass circuit of the third frequency band;

2. The antenna assembly of claim 1, wherein the frequency selective filtering sub-circuit comprises:

one end of the first inductor is electrically connected with the connection point;

a first capacitor connected in parallel with the first inductor; and

and one end of the second inductor is electrically connected with a node of the first capacitor connected with the first inductor in parallel, and the other end of the second inductor is grounded.

3. The antenna assembly of claim 1, wherein the second matching circuit further comprises:

the other end of the frequency-selective filter sub-circuit is grounded through the switch;

when the switch is in an off state, the first antenna supports a first sub-band and a second sub-band in a first frequency band, wherein the frequency of the first sub-band is less than the frequency of the second sub-band;

when the switch is in a closed state, the first antenna supports the first antenna to support at least a first sub-band of the first frequency band.

4. The antenna assembly of claim 1, wherein the bandpass sub-circuit includes a second capacitor and a third inductor, the second capacitor being connected in series with the third inductor; or,

the band-pass sub-circuit comprises a second capacitor and a third inductor, and the second capacitor is connected with the third inductor in parallel.

5. The antenna assembly of claim 1, wherein the second matching circuit further comprises:

a tuning sub-circuit to tune a resonance point of the third frequency band.

6. The antenna assembly of claim 5, wherein the tuning sub-circuit comprises:

and one end of the first tuning unit is electrically connected with the second signal source, and the other end of the first tuning unit is electrically connected with the connecting point.

7. The antenna assembly of claim 6, wherein the tuning sub-circuit further comprises at least one of a second tuning unit and a third tuning unit;

when the tuning sub-circuit comprises a second tuning unit, one end of the second tuning unit is grounded, and the other end of the second tuning unit is electrically connected to the other end of the first tuning unit;

when the tuning sub-circuit comprises a third tuning unit, one end of the third tuning unit is grounded, and the other end of the third tuning unit is electrically connected with the second signal source.

8. The antenna assembly of claim 7, wherein the first tuning element comprises a capacitor; when the tuning sub-circuit comprises the second tuning unit, the second tuning unit comprises a capacitance or an inductance; when the tuning sub-circuit comprises a third tuning element, the third tuning element comprises capacitance or inductance.

9. The antenna assembly of claim 3, wherein the first antenna has a first resonant mode, a second resonant mode, and a third resonant mode when the switch is in the off state, wherein the first resonant mode is to support a first sub-band of the first frequency band, wherein the second resonant mode is to support a second sub-band of the first frequency band, and wherein the third resonant mode is to support the second frequency band.

10. The antenna assembly of claim 9, wherein the first antenna has a first resonant mode, a second resonant mode, a fourth resonant mode, and a fifth resonant mode when the switch is in a closed state, wherein the first resonant mode and the second resonant mode each support at least a first frequency sub-band of the first frequency band, and wherein the fourth resonant mode and the fifth resonant mode each support the second frequency band.

11. An antenna assembly according to claim 9 or 10, wherein the first resonant mode corresponds to a current flow direction of: from the second ground to the second free end, from the second free end to the first free end via the coupling gap, and from the first free end to the first ground.

12. An antenna assembly according to claim 9 or claim 10, wherein the second mode of resonance is characterised by a current flow direction:

the first free end is connected to the second free end through the coupling gap, and the second free end flows to the second ground end.

13. The antenna assembly of claim 9, wherein the current corresponding to the third resonant mode comprises:

a first sub-current flowing from the first ground terminal to the first free terminal; and

a second sub-current flowing from the second ground terminal to the second free terminal.

14. The antenna assembly of claim 10, wherein the fourth resonant mode corresponds to a current flow direction that is:

the first signal source flows to the first free end through the first matching circuit and the connection point of the first matching circuit and the first radiator, flows to the second free end through the first free end and the coupling gap, and flows to the connection point of the second radiator and the ground through the second free end.

15. The antenna assembly of claim 10, wherein a distance d1 between the connection point of the second radiator and the second free end satisfies: d1 is more than or equal to 0 and less than or equal to L/2, wherein L is the length of the second radiator.

16. The antenna assembly according to claim 15, wherein when a distance d1 between the connection point of the second radiator and the coupling end surface is L/2, the current corresponding to the fifth resonance mode includes:

a third sub-current from the first signal source to the first free end via the first matching circuit, and the connection current of the first radiator; and

a fourth sub-current from a connection point of the second matching circuit, and the second radiator to the second free end.

17. The antenna assembly of claim 15, wherein when a distance d1 between the connection point of the second radiator and the coupling end face is 0, the current corresponding to the fifth resonant mode includes:

a fifth sub-current, which flows from the second matching circuit to the connection point of the second radiator and flows from the connection point of the second radiator toward the second ground; and

a sixth sub-current flowing from the second grounded end toward the first free end.

18. The antenna assembly of claim 1, wherein the first antenna further comprises:

and a third radiator electrically connected to the first matching circuit, the third radiator being configured to support the second frequency band or a fourth frequency band, wherein the fourth frequency band is different from any one of the first frequency band, the second frequency band, and the third frequency band.

19. The antenna assembly of claim 1, wherein the first frequency band is an MHB band, the second frequency band is a UHB band, and the third frequency band is a GPS-L5 band.

20. An electronic device comprising the antenna assembly of any one of claims 1-19, the electronic device having a top and a bottom, the first radiator and the second radiator each disposed on the top.