CN114976600A

CN114976600A - Antenna assembly, middle frame assembly and electronic equipment

Info

Publication number: CN114976600A
Application number: CN202210743400.6A
Authority: CN
Inventors: 罗智杰
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2022-08-30
Also published as: WO2024001069A1

Abstract

The application discloses antenna module, center subassembly and electronic equipment relates to communication technology field. In the antenna assembly, a first feed point of a first radiator receives a first excitation signal, the first radiator is in capacitive coupling with a second radiator, a tuning control point of the second radiator is connected with a tuning control circuit, a second feed point of the second radiator receives a second excitation signal, and the tuning control circuit generates a medium-high frequency band resonance mode by adjusting a medium-high frequency band resonance mode generated by exciting the first radiator and/or the second radiator by the first excitation signal and a low-frequency band resonance mode generated by exciting the first radiator and/or the second radiator by the second excitation signal; the medium-high frequency band resonance mode at least comprises an LTE medium-high frequency band resonance mode and an NR medium-high frequency band resonance mode, and when the low-frequency band resonance mode at least comprises an LTE low-frequency band resonance mode and an NR low-frequency band resonance mode, the antenna performance of the antenna assembly in the application is improved.

Description

Antenna assembly, middle frame assembly and electronic equipment

Technical Field

The application relates to the technical field of communication, in particular to an antenna assembly, a middle frame assembly and electronic equipment.

Background

With the development of technology, electronic devices such as mobile phones and the like with communication functions have higher popularity and higher functions. An antenna assembly is typically included in an electronic device to implement communication functions of the electronic device. However, the communication performance of the antenna assembly in the electronic device in the related art is not good enough, and there is still room for improvement.

Disclosure of Invention

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

the first radiator comprises a grounding point and a first free end, and the first radiator is provided with a first feeding point for receiving a first excitation signal;

a second radiator including a third free end and a second free end, the third free end being spaced apart from the first free end for capacitive coupling, the second radiator having a tuning control point and a second feeding point for receiving a second excitation signal, the second feeding point being disposed between the tuning control point and the second free end; and

a tuning control circuit connected to the tuning control point, the tuning control circuit configured to adjust a middle-high frequency band resonance mode generated by the first radiator and/or the second radiator excited by the first excitation signal and a low-frequency band resonance mode generated by the first radiator and/or the second radiator excited by the second excitation signal;

the medium-high frequency band resonance mode at least comprises a Long Term Evolution (LTE) medium-high frequency band resonance mode and a new air interface (NR) medium-high frequency band resonance mode, and the low frequency band resonance mode at least comprises an LTE low frequency band resonance mode and an NR low frequency band resonance mode.

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

a substrate;

a frame disposed at an edge of the substrate; and

the antenna assembly is arranged on the frame.

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

a display screen;

a housing assembly for mounting the display screen; and

the antenna assembly as described above, disposed in the housing assembly.

Adopt this application technical scheme, the beneficial effect who has does: in the application, a first feed point of a first radiator receives a first excitation signal, the first radiator is capacitively coupled with a second radiator, a tuning control point of the second radiator is connected with a tuning control circuit, a second feed point of the second radiator receives a second excitation signal, and the tuning control circuit adjusts a medium-high frequency band resonance mode generated by exciting the first radiator and/or the second radiator by the first excitation signal and a low-frequency band resonance mode generated by exciting the first radiator and/or the second radiator by the second excitation signal; the medium-high frequency band resonance mode at least comprises an LTE medium-high frequency band resonance mode and an NR medium-high frequency band resonance mode, and the low-frequency band resonance mode at least comprises an LTE low-frequency band resonance mode and an NR low-frequency band resonance mode.

Drawings

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

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

FIG. 2 is a graph illustrating a resonant current distribution for a portion of the resonant modes in the antenna assembly of the embodiment shown in FIG. 1;

FIG. 3 is a graph illustrating a resonant current distribution for a portion of the resonant modes in the antenna assembly of the embodiment shown in FIG. 1;

FIG. 4 is a graph of return loss for four resonant modes in the antenna assembly of the embodiment of FIG. 2;

FIG. 5 is a graph of four resonant modes dynamically adjusted return loss in the antenna assembly of the embodiment of FIG. 4;

FIG. 6 is a graph of return loss for two resonant modes in the antenna assembly of FIG. 3;

FIG. 7 is a graph of two resonant mode dynamically adjusted return loss curves for the antenna assembly of FIG. 6;

FIG. 8 is a schematic diagram of the tuning control circuit in the embodiment of FIG. 1;

FIG. 9 is a schematic diagram of a first matching circuit in cooperation with a first feed in the embodiment of FIG. 1;

FIG. 10 is a schematic diagram of the first matching circuit in the embodiment of FIG. 9 in conjunction with a first feed;

FIG. 11 is a graph illustrating a comparison of antenna performance between the antenna elements of the embodiments shown in FIG. 9 and the embodiment shown in FIG. 10;

FIG. 12 is a schematic diagram of a second matching circuit in cooperation with a second feed in the embodiment of FIG. 1;

fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

FIG. 14 is a schematic view of the antenna assembly of the embodiment of FIG. 13 mounted on a center frame assembly;

fig. 15 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings and embodiments. In particular, the following embodiments are merely illustrative of the present application, and do not limit the scope of the present application. Likewise, the following embodiments are only some embodiments of the present application, not all embodiments, and all other embodiments obtained by those skilled in the art without making any creative effort fall within the protection scope of the present application.

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

The present application provides an antenna assembly. The antenna assembly can be applied to electronic equipment. The antenna assembly can realize multi-mode switching of a medium-high frequency band, and also can realize multi-mode switching of a low-frequency band in some embodiments. In addition, the antenna assembly may also increase the bandwidth of the medium-high frequency band in some embodiments, so that the antenna assembly supports a Carrier Aggregation (CA) combination of an NR-5G (also referred to as a 5G New Radio, also referred to as a 5G New air interface, also referred to as a 5G-NR, also referred to as an NR-5G (New air interface)) band and/or a CA combination of a Long Term Evolution (Long Term Evolution) band and a 5G-NR Dual Connectivity (E-UTRAN New Radio-Dual Connectivity, abbreviated as endec) combination of a 4G Radio access network and/or a CA combination of a Long Term Evolution (LTE) band.

As used herein, "electronic equipment" (which may also be referred to as a "terminal" or "mobile terminal" or "electronic device") includes, but is not limited to, devices that are configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A cellular phone is an electronic device equipped with a cellular communication module.

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

The antenna assembly 100 may include a first radiator 10 and a second radiator 20 spaced apart by a slot 101. That is, the first radiator 10 and the second radiator 20 are spaced apart to be capacitively coupled. The first radiator 10 and the second radiator 20 cooperate to receive and transmit electromagnetic wave signals, so that multiplexing of the first radiator 10 and the second radiator 20 is realized, spatial multiplexing is also realized, and the size of the antenna assembly 100 is further reduced.

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

Referring to fig. 1, the first radiator 10 has a grounding point 11 far from the slot 101 and a first free end 12 close to the slot 101.

The grounding point 11 may be grounded. In some embodiments, the arrangement that the ground point 11 can coincide with the free end on the side away from the first free end 12 can reduce the length between the ground point 11 and the free end on the side away from the first free end 12 in fig. 1, thereby making the size of the first radiator 10 smaller.

The first free end 12 is spaced apart from the second radiator 20, i.e., the slot 101 is disposed between the first free end 12 and the second radiator 20.

The first radiator 10 has a first feed point 13 located between the ground point 11 and the first free end 12. In some embodiments, the first feeding point 13 may be connected with a first matching circuit 14. The first matching circuit 14 may be connected to a first feed 15.

The first matching circuit 14 is mainly used to meet the requirement of the antenna assembly 100 for the mid-high frequency band. The first matching circuit 14 may comprise a switch control unit and/or a load circuit, or a tunable capacitor and/or a tunable inductor, or a tunable capacitor and/or a switch control unit. In an embodiment, the switch control unit may be a switch chip with a switching function, and may also be a single-pole multi-throw switch or a single-pole single-throw switch.

The first feed 15 may be used to generate a first excitation signal to excite the first radiator 10 and/or the second radiator 20 to generate a middle-high frequency band resonance mode supporting a middle-high frequency band.

Referring to fig. 1, the second radiator 20 has a second free end 21 far from the slot 101 and a third free end 22 close to the slot 101.

The third free end 22 is spaced apart from the first radiator 10, for example the first free end 12, i.e. the slot 101 is arranged between the first free end 12 and the first radiator 10, for example the first free end 12.

The second radiator 20 has a second feeding point 23 located between the second free end 21 and the third free end 22. In some embodiments, the second feeding point 23 is connected to a second matching circuit 24. The second matching circuit 24 may be connected to a second feed 25.

The second matching circuit 24 is mainly used to fulfill the low frequency band requirement of the antenna assembly 100. The second matching circuit 24 may comprise a switch control unit and/or a load circuit, or a tunable capacitor and/or a tunable inductor, or a tunable capacitor and/or a switch control unit. That is, the second matching circuit 24 may be the same as or structurally similar to or functionally similar to or structurally different from the first matching circuit 14.

The second feed 25 may be configured to generate a second excitation signal to excite the first radiator 10 and/or the second radiator 20 to support a low frequency band resonance mode of the low frequency band. In some embodiments, the second excitation signal may also excite the first radiator 10 and/or the second radiator 20 to generate other resonant modes.

The second radiator 20 has a tuning control point 26 located between the third free end 22 and the second feeding point 23, and the tuning control point 26 is connectable to a tuning control circuit 27. The tuning control circuit 27 is grounded.

The tuning control circuit 27 may fulfill the need for the antenna assembly 100 to support low frequency bands. Of course, in some embodiments, the requirement that the antenna assembly 100 support medium and high frequency bands may also be implemented. Thus, the tuning control circuit 27 may comprise a switch control unit and/or a load circuit, or a tunable capacitor and/or a tunable inductor, or a tunable capacitor and/or a switch control unit. In an embodiment, the switch control unit may be a switch chip with a switching function, and may also be a single-pole multi-throw switch or a single-pole single-throw switch.

In some embodiments, the mid-to-high frequency band resonant modes supported by the antenna assembly 100 may be adjusted under the control of the tuning control circuit 27 and/or the first matching circuit 14.

In some embodiments, the mid-high frequency band resonance modes include at least an LTE mid-high frequency band resonance mode and an NR mid-high frequency band resonance mode.

In some embodiments, the low frequency band resonance modes supported by the antenna assembly 100 may be adjusted under the control of the tuning control circuit 27 and/or the second matching circuit 24.

In some embodiments, the low frequency band resonance modes include at least an LTE low frequency band resonance mode and an NR low frequency band resonance mode.

Referring to fig. 2, fig. 2 is a diagram illustrating a resonant current distribution of a portion of the resonant modes in the antenna assembly 100 shown in fig. 1. The first feed 15 may be used to generate a first excitation signal to excite the first radiator 10 and/or the second radiator 20. The first excitation signal excites the first radiator 10 and/or the second radiator 20 to generate medium and high frequency band resonance modes supporting the medium and high frequency bands, for example, a first resonance mode a1, a second resonance mode a2, a third resonance mode a3, and a fourth resonance mode a 4.

In some embodiments, the fundamental mode of operation of the antenna assembly 100 between the ground point 11 and the first feed point 13 produces a first resonant mode a 1. That is, the resonant current in the first resonant mode a1 may be distributed between the ground point 11 and the first feeding point 13.

In some embodiments, operation of antenna assembly 100 in the fundamental mode between slot 101 (or third free end 22) and tuning control point 26 produces second resonant mode a 2. That is, the resonant current in the second resonant mode a2 may be distributed between the slot 101 (or the third free end 22) and the tuning control point 26.

In some embodiments, operation of antenna assembly 100 in the fundamental mode between slot 101 (or third free end 22) and second free end 21 produces third resonant mode a 3. That is, the resonant current in the third resonant mode a3 may be distributed between the slot 101 (or the third free end 22) and the second free end 21.

In some embodiments, the antenna assembly 100 operates such that the fundamental mode between the slot 101 (or the first free end 12) and the first feeding point 13 produces a fourth resonant mode a 4. That is, the resonant current in the fourth resonant mode a4 may be distributed between the slot 101 (or the first free end 12) and the first feeding point 13.

Referring to fig. 3, fig. 3 is a diagram illustrating a resonant current distribution of a portion of the resonant modes in the antenna assembly 100 shown in fig. 1. The second feed 25 may be used to generate a second excitation signal to excite the first radiator 10 and/or the second radiator 20. In some embodiments, the second excitation signal excites the first radiator 10 and/or the second radiator 20 to generate a low frequency band resonance mode supporting a low frequency band, for example, a fifth resonance mode a 5. In some embodiments, the second excitation signal may also excite the second radiator 20 to generate a resonant mode, such as a sixth resonant mode a 6.

In some embodiments, the antenna assembly 100 operates such that the fundamental mode between the slot 101 (or the third free end 22) and the second feed point 23 produces a fifth resonant mode a 5. That is, the resonant current in the fifth resonant mode a5 may be distributed between the slot 101 (or the third free end 22) and the second feeding point 23.

In some embodiments, operation of antenna assembly 100 in the fundamental mode between slot 101 (or third free end 22) and second free end 21 produces sixth resonant mode a 6. That is, the resonant current in the sixth resonant mode a6 may be distributed between the slot 101 (or the third free end 22) and the second free end 21.

Referring to fig. 4 and 5, fig. 4 is a graph of return loss for four resonant modes in the antenna assembly 100 of the embodiment shown in fig. 2, and fig. 5 is a graph of return loss for dynamic adjustment for four resonant modes in the antenna assembly 100 of the embodiment shown in fig. 4, with frequency (GHz) on the horizontal axis and return loss (dB) on the vertical axis. Antenna assembly 100 may support a first resonant mode a1, a second resonant mode a2, a third resonant mode a3, and a fourth resonant mode a 4. The frequency band corresponding to the first resonance mode a1 is a middle-high frequency band b1, the frequency band corresponding to the second resonance mode a2 is a middle-high frequency band b2, the frequency band corresponding to the third resonance mode a3 is a middle-high frequency band b3, and the frequency band corresponding to the fourth resonance mode a4 is a middle-high frequency band b 4.

The return loss curve in fig. 4 may be return loss curve c1 in fig. 5. The frequency bands in which the antenna assembly 100 operates, such as the medium and high frequency bands a1, a2, a3, a4, may be tuned by the tuning control circuit 27. While the return loss curve may vary during tuning. For example, return loss curve c1 in fig. 5 translates to return loss curve c 2. For example, return loss curve c2 translates into return loss curve c 3. For example, return loss curve c3 in fig. 5 is transformed into return loss curve c 1.

In the return loss curves c1, c2, and c3 in fig. 5, the middle-high frequency band b1 in the first resonance mode a1, the middle-high frequency band b2 in the second resonance mode a2, the middle-high frequency band b3 in the third resonance mode a3, and the middle-high frequency band b4 in the fourth resonance mode a4 collectively form a wide middle-high frequency band.

When the tuning control circuit 27 is used to tune the frequency bands, such as the middle-high frequency bands a1, a2, a3, and a4, when the antenna assembly 100 operates, the middle-high frequency band b1 under the tunable first resonance mode a1, the middle-high frequency band b2 under the tunable second resonance mode a2, the middle-high frequency band b3 under the tunable third resonance mode a3, and the middle-high frequency band b4 under the tunable fourth resonance mode a4 jointly form a middle-high frequency band bandwidth. In some embodiments, the medium-high frequency bands include at least LTE medium-high frequency bands and NR medium-high frequency bands.

In some embodiments, the CA of the high frequency band in the NR includes at least one of CA of N1 band and N41 band, CA of N1 band and N78 band, CA of N3 band and N41 band, and CA of N3 band and N78 band.

In an embodiment, the LTE high-frequency band includes at least one of an LTE B1 band, an LTE B3 band, an LTE B4 band, an LTE B7 band, an LTE B38 band, an LTE B39 band, an LTE B40 band, and an LTE B41 band, and/or the NR high-frequency band includes at least one of an N1 band, an N3 band, an N40 band, an N41 band, and an N78 band.

The middle-high frequency band of the antenna assembly 100, for example, the middle-high frequency band b1 under the first resonant mode a1, the middle-high frequency band b2 under the second resonant mode a2, the middle-high frequency band b3 under the third resonant mode a3, and the middle-high frequency band b4 under the fourth resonant mode a4, may include CA of the NR middle-high frequency band and/or endec of the LTE middle-high frequency band and the NR middle-high frequency band.

In some embodiments, the endec for the LTE and NR midbands includes: at least one of an ENDC of an LTE B1 frequency band and an N41 frequency band, an ENDC of an LTE B3 frequency band and an N41 frequency band, an ENDC of an LTE B39 frequency band and an N41 frequency band, an ENDC of an LTE B1 frequency band and an N78 frequency band, an ENDC of an LTE B3 frequency band and an N78 frequency band, and an ENDC of an LTE B39 frequency band and an N78 frequency band.

In an embodiment, the middle-high frequency band of the antenna assembly 100, such as the middle-high frequency band b1 under the first resonant mode a1, the middle-high frequency band b2 under the second resonant mode a2, the middle-high frequency band b3 under the third resonant mode a3, and the middle-high frequency band b4 under the fourth resonant mode a4, may include CA of the middle-high frequency band in LTE. In some embodiments, the CA of the high frequency band in LTE includes CA of the LTE B1 band and the LTE B3 band and/or CA of the LTE B1 band and the LTE B3 band, the LTE B7 band.

Referring to fig. 5, the horizontal axis represents frequency (GHz) and the vertical axis represents return loss (dB). The return loss curve c1 has d1(1.71, -9.6691) and d2(1.88, -8.3027), and it can be seen that the middle-high frequency band b1 can include the frequency band 1.71-1.88GHz, and the return loss is less than-7.5 dB, so that the antenna assembly 100 can work well in the first resonant mode a 1. The return loss curve c1 has d3(1.92, -7.6373) and d4(2.17, -12.374), and it can be seen that the middle-high frequency band b2 can include the frequency band 1.92-2.17GHz, and the return loss is less than-7.5 dB, so that the antenna assembly 100 can work well in the second resonant mode a 2. The return loss curve c1 has d9(3.4, -6.32) and d10(3.6, -6.1354), and it can be seen that the middle-high frequency band b4 can include the frequency band 3.4-3.6GHz, and the return loss corresponding to part of the frequency bands is less than-7.5 dB, so that the antenna assembly 100 can work well under the fourth resonant mode a 4.

The return loss curve c2 tuned by the tuning control circuit 27 has d5(2.3, -6.3584) and d6(2.4, -28.841), and it can be seen that the medium-high frequency band b2 can include the frequency band 2.3-2.4GHz, and the return loss corresponding to a part of the frequency band is less than-7.5 dB, and even the return loss can be-28.841 dB, so the antenna assembly 100 can work well in the second resonance mode a2, and the antenna performance of the antenna assembly 100 can be changed under the tuning of the tuning control circuit 27.

The return loss curve c3 tuned by the tuning control circuit 27 has d7(2.5, -5.2057) and d8(2.7, -16.357), and it can be seen that the medium-high frequency band b2 can include the frequency band 2.5-2.7GHz, and the return loss corresponding to a part of the frequency band is less than-7.5 dB, and even the return loss can be-16.357 dB, so the antenna assembly 100 can work well in the second resonance mode a2, and the antenna performance of the antenna assembly 100 can be changed under the tuning of the tuning control circuit 27.

Furthermore, when the tuning control circuit 27 is used to tune the frequency bands, such as the middle-high frequency bands a1, a2, a3, and a4, during the operation of the antenna assembly 100, the middle-high frequency band b1 under the first resonant mode a1, the middle-high frequency band b2 under the second resonant mode a2, the middle-high frequency band b3 under the third resonant mode a3, and the middle-high frequency band b4 under the fourth resonant mode a4 may be tuned to jointly form the middle-high frequency band bandwidth.

Referring to fig. 6 and 7, fig. 6 is a graph of return loss for two resonant modes in the antenna assembly 100 shown in fig. 3, and fig. 7 is a graph of return loss for two resonant modes dynamically adjusted in the antenna assembly 100 shown in fig. 6, with frequency (GHz) on the horizontal axis and return loss (dB) on the vertical axis. The return loss curve in fig. 6 may be return loss curve c4 in fig. 7. The antenna assembly 100 may support a fifth resonant mode a5, a sixth resonant mode a 6. The frequency band corresponding to the fifth resonant mode a5 is a low frequency band b5, the frequency band corresponding to the sixth resonant mode a6 is a frequency band b6, wherein the return loss curve c4 has e1(0.744, -6.7083) and e2(1.312, -2.4034), the low frequency band b5 may include 0.744GHz, the frequency band b6 may include 1.312GHz, and-6.7083 dB is smaller than-2.4034 dB, so that the antenna performance of the antenna assembly 100 in the fifth resonant mode a5 is better than that in the sixth resonant mode a 6.

The frequency bands in which the antenna assembly 100 operates, such as the low frequency band b5 and the frequency band b6, can be tuned by the tuning control circuit 27. While the return loss curve may change during tuning. For example, return loss curve c4 in fig. 7 translates to return loss curve c 5. For example, return loss curve c5 in fig. 7 translates to return loss curve c 6. For example, return loss curve c6 in fig. 7 translates to return loss curve c 5.

In the return loss curves c4, c5, c6 in fig. 7, the low frequency band b5 under the fifth resonance mode a5 may be different ones of the low frequency bands. Which in turn may be tuned by the tuning control circuit 27 such that the low frequency band b5 may comprise an LTE low frequency band and/or an NR low frequency band.

In some embodiments, the LTE low frequency band includes at least one of an LTE B5 band, an LTE B8 band, an LTE B12 band, an LTE B17 band, an LTE B18 band, an LTE B19 band, an LTE B20 band, an LTE B26 band, and an LTE B28 band.

In some embodiments, the NR low frequency bands include at least one of an N5 band, an N8 band, an N20 band, and an N28 band.

Referring to fig. 7, the horizontal axis represents frequency (GHz) and the vertical axis represents return loss (dB). The return loss curve c4 has e3(0.7, -4.8277), e4(0.79, -4.9648), and the low frequency band b5 may include 0.7-0.79 GHz. The return loss curve c5 has e5 (0.824-6.4661), e6 (0.894-6.609), and the low frequency band b5 may include 0.824-0.894 GHz. The return loss curve c5 has e7(0.88, -7.2099), e8(0.96, -7.2059), and the low frequency band b5 may include 0.88-0.96 GHz. The return loss of the antenna assembly 100 is adjusted by the tuning control circuit 27, and the return loss is changed, and by comparing e3(0.7, -4.8277), e4(0.79, -4.9648), e5(0.824, -6.4661), e6(0.894, -6.609), e7(0.88, -7.2099) and e8(0.96, -7.2059), it can be known that the return loss of the low-frequency band b5 under the fifth resonance mode a5 is better than the return loss of the low-frequency band b5 under the return loss curves c4 and c5 on the return loss curve c6, so that the bandwidth of the low-frequency band can be adjusted after tuning by the tuning control circuit 27, and the antenna performance of the fifth resonance mode a5 can be better.

In one embodiment, the tuning control circuit 27 includes a switch control unit 271 and/or a tunable capacitor. In an embodiment, please refer to fig. 8, fig. 8 is a schematic structural diagram of the tuning control circuit 27 in the embodiment shown in fig. 1. The tuning control circuit 27 may include a first resistor Rfc connected to the tuning control point 26 at a connection end, a first inductor L1 connected to the other connection end of the first resistor Rfc at a connection end and grounded at the other connection end, and a first branch 272, a second branch 273, a third branch 274, and a fourth branch 275 connected to the other connection end of the first resistor Rfc, respectively.

In some embodiments, the inductance of the first inductor L1 is 80 nH.

The first branch 272 may include a first switch SW1 having a connection terminal connected to the other connection terminal of the first resistor Rfc, a second resistor Rf1 having a connection terminal connected to the other connection terminal of the first switch SW1, a second switch SWsh1 having a connection terminal connected to the other connection terminal of the first switch SW1 and the other connection terminal grounded, and a first capacitor C1 having a connection terminal connected to the other connection terminal of the second resistor Rf1 and the other connection terminal grounded.

The second branch 273 may include a first switch SW2 having a connection end connected to the other connection end of the first resistor Rfc, a second resistor Rf2 having a connection end connected to the other connection end of the first switch SW2, a second switch SWsh2 having a connection end connected to the other connection end of the first switch SW2 and the other connection end grounded, and a first capacitor C2 having a connection end connected to the other connection end of the second resistor Rf2 and the other connection end grounded.

It can be seen that the first branch 272 has the same circuit structure as the second branch 273. In some embodiments, the first capacitor C1 has a capacitance of 2.9 pF. In some embodiments, the first capacitor C2 has a capacitance of 1.7 pF.

The third branch 274 may include a third switch SW3 having a connection terminal connected to the other connection terminal of the first resistor Rfc, a third resistor Rf3 having a connection terminal connected to the other connection terminal of the third switch SW3, a fourth switch SWsh3 having a connection terminal connected to the other connection terminal of the third switch SW3 and the other connection terminal grounded, and a second inductor L2 having a connection terminal connected to the other connection terminal of the third resistor Rf3 and the other connection terminal grounded.

The fourth branch 275 may include a third switch SW4 having a connection terminal connected to the other connection terminal of the first resistor Rfc, a third resistor Rf4 having a connection terminal connected to the other connection terminal of the third switch SW4, a fourth switch SWsh4 having a connection terminal connected to the other connection terminal of the third switch SW4 and the other connection terminal grounded, and a second inductor L3 having a connection terminal connected to the other connection terminal of the third resistor Rf4 and the other connection terminal grounded.

It can be seen that the third branch 274 has the same circuit structure as the fourth branch 275. In some embodiments, the inductance of the second inductor L2 is 9.4 nH. In some embodiments, the inductance of the second inductor L3 is 19 nH.

It is understood that the first switch SW1, the second switch SWsh1, the first switch SW2, the second switch SWsh2, the third switch SW3, the fourth switch SWsh3, the third switch SW4, and the fourth switch SWsh4 may constitute the switch control unit 271. Of course, the switch control unit 271 may also include other structures. In some embodiments, the switch control unit 271 may further be modified in structure and control manner based on the first switch SW1, the second switch SWsh1, the first switch SW2, the second switch SWsh2, the third switch SW3, the fourth switch SWsh3, the third switch SW4, and the fourth switch SWsh 4.

In some embodiments, referring to fig. 8, tuning is performed by using the switch control unit 271. During tuning, the switch control unit 271 and the supportable frequency bands are shown in the following table:

in some embodiments, referring to fig. 9, fig. 9 is a schematic structural diagram of the first matching circuit 14 and the first feed 15 in the embodiment shown in fig. 1. The first matching circuit 14 may include a third inductor L4 having a connection terminal connected to the first feeding point 13 and the other connection terminal grounded, a second capacitor C3 having a connection terminal connected to the first feeding point 13, a third capacitor C4 having a connection terminal connected to the other connection terminal of the second capacitor C3 and the other connection terminal connected to the first feed 15, and a fourth inductor L5 having a connection terminal connected to the other connection terminal of the second capacitor C3 and the other connection terminal connected to the first feed 15. In one embodiment, the inductance of the third inductor L4 is 18 nH. In one embodiment, the second capacitor C3 has a capacitance of 0.8 pF. In one embodiment, the third capacitor C4 has a capacitance of 0.8 pF. In one embodiment, the inductance of the fourth inductor L5 is 18 nH.

In some embodiments, please refer to fig. 10, fig. 10 is a schematic structural diagram illustrating the first matching circuit 14 and the first feed 15 in the embodiment shown in fig. 9 when they are matched. The first matching circuit 14 may further include a fifth switch SW5 having a connection terminal connected to the first feeding point 13 and a fourth capacitor C5 having a connection terminal connected to the other connection terminal of the fifth switch SW5 and the other connection terminal connected to the other connection terminal of the second capacitor C3. It will be appreciated that the fifth switch SW5 is connected in series with the fourth capacitor C5, i.e., the order of the two can be modified, e.g., interchanged. In one embodiment, the capacitance of the fourth capacitor C5 is 1 pF. In some embodiments, the fifth switch SW5 may be a single pole, single throw switch.

In some embodiments, referring to fig. 11, fig. 11 is a graph illustrating antenna performance comparison of the antenna element 100 in the embodiment shown in fig. 9 and the embodiment shown in fig. 10. Where f1 is a System Total Efficiency (System Radiation Efficiency-return loss) curve of the antenna assembly 100 in the embodiment shown in fig. 9. F2 is a system total efficiency curve for antenna assembly 100 in the embodiment shown in fig. 10. Among them, the curves f2 have g1(2.5, -1.9869) and g2(2.7, -1.9291). The curve f1 shows g3(2.5, -2.1193) and g4(2.7, -2.7151). In the frequency band of 2.5-2.7GHz, the total system efficiency of the antenna assembly 100 in the curve f2 is greater than that of the antenna assembly 100 in the curve f1, and further, the combination of the fifth switch SW5 or the fifth switch SW5 and the fourth capacitor C5 can improve the total system efficiency of the antenna assembly 100. In some embodiments, the antenna assembly 100 may be made to have an increased overall system efficiency over carrier aggregation bands, such as the LTE Band 41(LTE B41) Band or the NR-5G N41 Band or the LTE Band 41(LTE B41) Band + NR-5G N41 Band.

In some embodiments, referring to fig. 12, fig. 12 is a schematic structural diagram of the second matching circuit 24 and the second feed 25 in the embodiment shown in fig. 1. The second matching circuit 24 may include a fifth inductor L6 having a connection terminal connected to the second feeding point 23 and the other connection terminal grounded, a sixth inductor L7 having a connection terminal connected to the second feeding point 23 and the other connection terminal connected to the second feed 25, and a fifth capacitor C6 having a connection terminal connected to the other connection terminal of the sixth inductor L7 and the other connection terminal grounded. In some embodiments, the inductance of the fifth inductor L6 is 3.9 nH. In some embodiments, the inductance of the sixth inductance L7 is 6.2 nH. In some embodiments, the capacitance of the fifth capacitor C6 is 2.5 pF.

Next, an electronic device that can mount the antenna assembly 100 in the above-described embodiment will be explained. The electronic device may be any one of a number of electronic devices including, but not limited to, cellular phones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, calculators, programmable remote controllers, pagers, netbook computers, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), moving picture experts group (MPEG-1 or MPEG-2), audio layer 3(MP3) players, portable medical devices, and digital cameras and combinations thereof.

Referring to fig. 13, fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device 200 may include a display screen 30 for displaying information, a middle frame assembly 40 for mounting the display screen 30 on one side, a circuit board 50 mounted on the middle frame assembly 40, a battery 60 mounted on the middle frame assembly 40, and a rear cover 70 snap-coupled to the other side of the middle frame assembly 40.

In some embodiments, the electronic device 200 may include, but is not limited to, an electronic device having a communication function, such as a mobile phone, an internet device (MID), an electronic book, a Portable Player Station (PSP), or a Personal Digital Assistant (PDA).

The Display 30 may be a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display, and the like, for displaying information and pictures.

The material of the middle frame assembly 40 may be a metal such as magnesium alloy, aluminum alloy, stainless steel, etc., but the material is not limited thereto and may be other materials. The center frame assembly 40 may be disposed between the display screen 30 and the rear cover 70. The center frame assembly 40 may be used to carry the display screen 30. The middle frame assembly 40 is snap-fit connected with the rear cover 70 to form an outer contour of the electronic device 200 and an accommodating cavity is formed inside. The housing chamber may be used to house electronic components such as a camera, a circuit board 50, a battery 60, a processor, and various types of sensors in the electronic apparatus 200.

The circuit board 50 is mounted in the receiving cavity, and may be mounted at any position in the receiving cavity. The circuit board 50 may be a main board of the electronic device 200. The processor of the electronic device 200 may be provided on the circuit board 50. One, two or more functional components such as a motor, a microphone, a speaker, a receiver, an earphone interface, a universal serial bus interface (USB interface), a camera, a distance sensor, an ambient light sensor, and a gyroscope may also be integrated on the circuit board 50. Meanwhile, the display screen 30 may be connected to the circuit main board 50.

The battery 60 is mounted in the receiving cavity and may be mounted at any position in the receiving cavity. The battery 60 may be connected to the circuit board 50 to supply power to the electronic device 200 from the battery 60. The circuit board 50 may be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 60 to various electronic components in the electronic device 200, such as the display screen 30.

The back cover 70 may be made of the same material as the center frame assembly 40, although other materials may be used. The rear cover 70 may be integrally formed with the center frame assembly 40. In some embodiments, the back cover 70 may wrap around the center frame assembly 40 and may carry the display screen 30. Rear cover 70 is last to form rear camera hole, fingerprint identification module mounting hole isotructure.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Referring to fig. 14, fig. 14 is a schematic structural diagram illustrating the antenna assembly 100 of fig. 13 mounted on the middle frame assembly 40. The middle frame assembly 40 may include a substrate 41 for carrying the display screen 30 and a bezel 42 surrounding the substrate 41. Wherein the substrate 41 is disposed opposite to the rear cover 70. The bezel 42 may be adapted to snap fit with the rear cover 70. That is, the substrate 41, the frame 42, and the rear cover 70 enclose a housing cavity.

The substrate 41 may be a conductive metal, but may be other materials. A ground plane and a feed source may be provided on the substrate 41. In some embodiments, the ground plane and the feed source may not be disposed on the substrate 41, but directly disposed on the circuit board 50.

The bezel 42 may be a conductive metal, so the bezel 42 may also be referred to as a "metal bezel". Although the frame 42 may be other materials. The frame 42 may include a first frame 421, a second frame 422, a third frame 423, and a fourth frame 424 connected end to end in sequence. The first frame 421, the second frame 422, the third frame 423, and the fourth frame 424 surround the substrate 41 and can be connected and fixed with the substrate 41.

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

The middle frame assembly 40 and the rear cover 70 may constitute a housing assembly. And the housing assembly may not be limited to the middle frame assembly 40 and the rear cover 70. The housing assembly may be attached, bonded, clamped, snapped, welded, etc. to provide the antenna assembly 100.

In some embodiments, the antenna assembly 100 may be formed from a housing assembly. For example, the antenna assembly 100 may be formed from a bezel 42, such as a first bezel 421 and a second bezel 422.

Referring to fig. 14 again, a gap 43 is disposed between the second frame 422 and the substrate 41. The gap 43 may extend toward the first frame 421 in the extending direction of the second frame 422. The gap 43 may be extended in an extending direction of the first frame 421 to be formed between the first frame 421 and the substrate 41.

The second frame 422 is provided with a slot 431 and a slot 432 communicating with the gap 43, so that the first radiator 10 of the antenna assembly 100 is formed between the slot 431 and the slot 432.

The first frame 421 is provided with a slot 433 communicating with the gap 43, so that the frame 42 forms the second radiator 20 of the antenna assembly 100 between the slot 431 and the slot 433.

In the present application, the first radiator 10 utilizes the second frame 422, and the first frame 421 can be reduced in use, so that the performance loss of the hand to the antenna assembly 100 can be effectively improved, and the length of the first radiator 10 utilizing the second frame 422 can be adjusted according to the model of the hand model and the resonance required length of the required frequency band.

It is understood that the extending length of the gap 43 may be determined as required, and in some embodiments, the gap 43 may not extend in the extending direction of the second rim 422, i.e., may not be disposed between the second rim 422 and the substrate 41. In some embodiments, the gap 43 may not extend in the extending direction of the first frame 421, that is, the gap may not extend between the first frame 421 and the substrate 41.

In addition, the positions of the

slits

431, 432, 433 may be adjusted according to the needs and the length of the frame, and are not described again.

The tuning control circuit 27 in the antenna assembly 100 may be connected to a ground plane on the substrate 41 or the circuit board 50 to be grounded.

The first feed 15 in the antenna assembly 100 may be a feed on the substrate 41 or the circuit board 50.

The grounding point 11 of the antenna assembly 100 can be connected to the ground plane on the substrate 41 or the circuit board 50 for grounding.

The second feed 25 in the antenna assembly 100 may be a feed on the substrate 41 or the circuit board 50.

It is understood that the connection strength between the substrate 41 and the frame 42 is stabilized. An insulating material, such as resin, may be filled between the gap 43, the gap 431, the gap 432, and the gap 433, so that the first radiator 10 and the second radiator 20 in the antenna assembly 100 are part of the frame 42, and the appearance of the electronic device 200 is further improved.

Referring to fig. 15, fig. 15 is a schematic structural diagram of an electronic device 300 according to an embodiment of the present disclosure. The electronic device 300 may be a mobile phone, a tablet computer, a notebook computer, a wearable device, and the like. The embodiment illustrates a mobile phone as an example. The structure of the electronic device 300 may include an RF circuit 310 (such as the antenna assembly 100 in the above-described embodiment), a memory 320, an input unit 330, a display unit 340 (such as the display screen 30 in the above-described embodiment), a sensor 350, an audio circuit 360, a WiFi module 370, a processor 380, a power supply 390 (such as the battery 60 in the above-described embodiment), and the like. The RF circuit 310, the memory 320, the input unit 330, the display unit 340, the sensor 350, the audio circuit 360, and the WiFi module 370 are respectively connected to the processor 380. The power supply 390 is used to provide power to the entire electronic device 300.

Specifically, the RF circuit 310 is used for transmitting and receiving signals. The memory 320 is used to store data instruction information. The input unit 330 is used for inputting information, and may specifically include a touch panel 3301 and other input devices 3302 such as operation keys. The display unit 340 may include a display panel 3401 and the like. The sensor 350 includes an infrared sensor, a laser sensor, a position sensor, etc. for detecting a user approach signal, a distance signal, etc. The speaker 3601 and the microphone (or microphone or receiver set) 3602 are connected to the processor 380 through the audio circuit 360, and are used for receiving and transmitting sound signals. The WiFi module 370 is used for receiving and transmitting WiFi signals. The processor 380 is used for processing data information of the electronic device.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of modules or units is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.

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

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

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

Claims

1. An antenna assembly, comprising:

a second radiator including a second free end and a third free end, the third free end being spaced apart from the first free end for capacitive coupling, the second radiator having a tuning control point and a second feeding point for receiving a second excitation signal, the second feeding point being disposed between the tuning control point and the second free end; and

2. The antenna assembly of claim 1, wherein the tuning control circuit is configured to adjust the mid-high frequency band resonant mode to support at least one of:

carrier aggregation CA of a high-frequency band in NR;

CA of high frequency band in LTE; and

and double connection ENDC of the LTE middle and high frequency band and the NR middle and high frequency band.

3. The antenna assembly of claim 2, wherein the CA of the high frequency band in the NR comprises at least one of CA of N1 band and N41 band, CA of N1 band and N78 band, CA of N3 band and N41 band, and CA of N3 band and N78 band.

4. The antenna assembly of claim 2, wherein the ENDC in LTE-HF and NR-HF comprises at least one of ENDC in LTE B1 band and N41 band, ENDC in LTE B3 band and N41 band, ENDC in LTE B39 band and N41 band, ENDC in LTE B1 band and N78 band, ENDC in LTE B3 band and N78 band, ENDC in LTE B39 band and N78 band.

5. The antenna assembly of claim 2, wherein the CA for the high frequency bands in LTE comprises CA for LTE B1 band and LTE B3 band and/or CA for LTE B1 band and LTE B3 band, LTE B7 band.

6. The antenna assembly of claim 1, wherein the LTE-high frequency bands comprise at least one of LTE B1 bands, LTE B3 bands, LTE B4 bands, LTE B7 bands, LTE B38 bands, LTE B39 bands, LTE B40 bands, and LTE B41 bands;

the NR medium-high frequency band includes at least one of an N1 band, an N3 band, an N40 band, an N41 band, and an N78 band.

7. The antenna assembly of claim 1, wherein the middle-high frequency band resonant modes include at least one of a first resonant mode, a second resonant mode, a third resonant mode, and a fourth resonant mode, wherein a resonant current in the first resonant mode is distributed between the ground point and the first feeding point, wherein a resonant current in the second resonant mode is distributed between the third free end and the tuning control point, wherein a resonant current in the third resonant mode is distributed between the third free end and the second free end, and wherein a resonant current in the fourth resonant mode is distributed between the first free end and the first feeding point.

8. The antenna assembly of claim 1, wherein the LTE low frequency band comprises at least one of an LTE B5 band, an LTE B8 band, an LTE B12 band, an LTE B17 band, an LTE B18 band, an LTE B19 band, an LTE B20 band, an LTE B26 band, and an LTE B28 band;

the NR low frequency bands include at least one of an N5 band, an N8 band, an N20 band, and an N28 band.

9. The antenna assembly of claim 1, wherein the low frequency band resonant mode comprises a fifth resonant mode, and wherein a resonant current in the fifth resonant mode is distributed between the third free end and the second feed point.

10. The antenna assembly of claim 1, wherein the low frequency band resonant modes include a sixth resonant mode, and wherein resonant current in the sixth resonant mode is distributed between the third free end and the second free end.

11. The antenna assembly of any one of claims 1-10, wherein the tuning control circuit is grounded, the tuning control circuit comprising a switching control unit and/or an adjustable capacitor.

12. The antenna assembly of any one of claims 1-10, wherein the tuning control circuit comprises:

the first resistor, a connection end is connected with the tuning control point;

the first inductor is connected with the other connecting end of the first resistor through a connecting end, and the other connecting end of the first inductor is grounded;

first branch road and second branch road, every first branch road and second branch road include:

a first switch, one connection end of which is connected with the other connection end of the first resistor;

a second resistor, one connection end of which is connected with the other connection end of the first switch;

a second switch, one connection end of which is connected with the other connection end of the first switch, and the other connection end of which is grounded; and

a first capacitor, one connection end of which is connected with the other connection end of the second resistor, and the other connection end of which is grounded; and

a third branch and a fourth branch, each of the third branch and the fourth branch comprising:

a connection end of the third switch is connected with the other connection end of the first resistor;

a connection end of the third resistor is connected with the other connection end of the third switch;

a connection end of the fourth switch is connected with the other connection end of the third switch, and the other connection end is grounded; and

and one connecting end of the second inductor is connected with the other connecting end of the third resistor, and the other connecting end of the second inductor is grounded.

13. The antenna assembly of any one of claims 1-10, further comprising:

the first matching circuit is connected with the first feed point through a connecting end; and

and the first feed source is connected with the other connecting end of the first matching circuit and is used for generating the first excitation signal.

14. The antenna assembly of claim 13, wherein the first matching circuit comprises:

a third inductor, one connection end is connected with the first feed point, and the other connection end is grounded;

the second capacitor, a connection end is connected with said first feed point;

a third capacitor, one connection end of which is connected with the other connection end of the second capacitor, and the other connection end of which is connected with the first feed source; and

and one connecting end of the fourth inductor is connected with the other connecting end of the second capacitor, and the other connecting end of the fourth inductor is connected with the first feed source.

15. The antenna assembly of claim 14, wherein the first matching circuit comprises:

a connection end of the fourth capacitor is connected with the first feed point; and

and one connection end of the fifth switch is connected with the other connection end of the fourth capacitor, and the other connection end of the fifth switch is connected with the other connection end of the second capacitor.

16. The antenna assembly of any one of claim 1, further comprising:

a second matching circuit, a connection end of which is connected with the second feed point; and

and the second feed source is connected with the other connecting end of the second matching circuit and is used for generating the second excitation signal.

17. The antenna assembly of claim 16, wherein the second matching circuit comprises:

a fifth inductor, wherein one connection end is connected with the second feed point, and the other connection end is grounded;

a connection end of the sixth inductor is connected with the second feed point, and the other connection end of the sixth inductor is connected with the second feed source; and

and one connecting end of the fifth capacitor is connected with the other connecting end of the sixth inductor, and the other connecting end of the fifth capacitor is grounded.

18. A center frame assembly, comprising:

a substrate;

a frame disposed at an edge of the substrate; and

the antenna assembly of any one of claims 1-17, disposed on the rim.

19. An electronic device, comprising:

a display screen;

a housing assembly for mounting the display screen; and

the antenna assembly of any one of claims 1-17, disposed at the housing assembly.