Antenna assembly and electronic equipment

Abstract

The present application discloses an antenna assembly and an electronic device. On the one hand, the first antenna unit and the second antenna unit of the antenna assembly are co-aperture antennas. On the other hand, by reasonably designing the distance between the connection point where the second feed source included in the second antenna unit is electrically connected to the second radiator and the second ground terminal, the connection point where the second feed source is electrically connected to the second radiator is farther away from the second ground terminal, and the width of the radiator on the side where the second ground terminal returns to the ground is smaller than the width of the second radiator, which significantly improves the performance of the third frequency band, thereby improving the communication performance of the antenna assembly.

Description

Technical Field

[0001] The present application relates to but is not limited to communication technology, and in particular to an antenna assembly and an electronic device. Background Art

[0002] With the development of technology, electronic devices with communication functions such as mobile phones are becoming more and more popular and their functions are becoming more and more powerful. Electronic devices usually include antenna components to realize the communication function of electronic devices. However, the communication performance of antenna components in electronic devices in related technologies is not good enough and there is still room for improvement. Summary of the invention

[0003] The present application provides an antenna assembly and an electronic device, which can improve the communication performance of the antenna assembly.

[0004] The embodiment of the present application provides an antenna assembly, comprising: a first antenna unit and a second antenna unit; wherein:

[0005] The first antenna unit includes a first radiator and a first feed source, wherein the first feed source is electrically connected to the first radiator and is used to excite the first radiator to resonate in the first frequency band and the second frequency band;

[0006] The second antenna unit includes a second radiator and a second feed source, wherein the second feed source is electrically connected to the second radiator and is used to excite the second radiator to resonate in a third frequency band;

[0007] The first radiator includes a first grounding end and a first free end, and the second radiator includes a second grounding end and a second free end; the first free end and the second free end are spaced apart to form a gap, and the first radiator and the second radiator are coupled through the gap; the first grounding end is grounded, and the second grounding end is grounded;

[0008] The distance between the connection point where the second feed source is electrically connected to the second radiator and the second grounding end is greater than a preset distance, and / or the width of the radiator on the ground return side of the second grounding end is smaller than the width of the second radiator.

[0009] An antenna assembly provided in an embodiment of the present application, on the one hand, comprises a first antenna unit and a second antenna unit which are co-aperture antennas; on the other hand, by reasonably designing the distance between the connection point where the second feed source and the second radiator are electrically connected and the second ground terminal included in the second antenna unit, the connection point where the second feed source and the second radiator are electrically connected is farther away from the second ground terminal, and the width of the radiator on the side where the second ground terminal returns to the ground is smaller than the width of the second radiator, thereby significantly improving the performance of the third frequency band, thereby improving the communication performance of the antenna assembly.

[0010] In one embodiment, the antenna assembly provided in the embodiment of the present application further includes: a first isolation capacitor, a second isolation capacitor, a loop inductor, and a near field communication NFC chip; wherein,

[0011] The first isolation capacitor is electrically connected between the first radiator and the first reference ground, and the first isolation capacitor is used to isolate the NFC current;

[0012] The second isolation capacitor is electrically connected between the second radiator and the second reference ground, and the second isolation capacitor is used to isolate the NFC current;

[0013] The loop inductor is electrically connected between a first feeding point where the first matching circuit is connected to the first radiator, and a second feeding point where the second matching circuit is connected to the second radiator, and the loop inductor is used to connect the first radiator and the second radiator to form a current path of the NFC antenna;

[0014] A first differential signal port of the NFC chip is connected to a first connection point of the first ground terminal, a second differential signal port of the NFC chip is connected to a second connection point of the second ground terminal, and the NFC chip is used to provide a differential excitation current; and a conductive path formed by the radiator part between the first connection point and the second connection point is used to transmit the differential excitation current generated by the NFC chip.

[0015] On the one hand, the first antenna unit and the second antenna unit in the antenna assembly are coupled through a gap to form a common-aperture antenna. Moreover, since the connection point where the second feed source included in the second antenna unit is electrically connected to the second radiator is farther away from the second grounding terminal and the radiator on the ground return side of the second grounding terminal is thinned, the performance of the third frequency band is improved, thereby improving the communication performance of the antenna assembly. On the other hand, through the clever setting of the first isolation capacitor, the second isolation capacitor and the loop inductor, the connection with the NFC chip is achieved, the NFC current path is formed, and the NFC antenna co-body is realized. Moreover, since the value of the loop inductance is large, it will not affect the performance of the first antenna unit and the second antenna unit.

[0016] An embodiment of the present application also provides an electronic device, comprising the antenna assembly described in any one of the embodiments of the present application.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0019] Figure 1 This is a schematic diagram of the composition structure of the first embodiment of the antenna assembly in the embodiments of the present application;

[0020] FIG. 2( a ) is a schematic diagram of a circuit diagram of a first embodiment of a matching circuit of an antenna assembly in an embodiment of the present application;

[0021] FIG. 2( b ) is a schematic diagram of a circuit diagram of a second embodiment of a matching circuit of an antenna assembly in an embodiment of the present application;

[0022] FIG. 2( c ) is a schematic diagram of a circuit diagram of a third embodiment of a matching circuit of an antenna assembly according to an embodiment of the present application;

[0023] FIG. 2( d ) is a schematic diagram of a circuit diagram of a fourth embodiment of a matching circuit of an antenna assembly according to an embodiment of the present application;

[0024] FIG. 2( e ) is a schematic diagram of a circuit diagram of a fifth embodiment of a matching circuit of an antenna assembly according to an embodiment of the present application;

[0025] FIG2( f ) is a schematic diagram of a sixth embodiment of a matching circuit of an antenna assembly according to an embodiment of the present application;

[0026] FIG. 2( g ) is a schematic diagram of a seventh embodiment of a matching circuit for an antenna assembly according to an embodiment of the present application;

[0027] FIG2(h) is a schematic diagram of a circuit diagram of an eighth embodiment of a matching circuit of an antenna assembly according to an embodiment of the present application;

[0028] Figure 3 This is a schematic diagram of the structure of the second embodiment of the antenna assembly in the embodiments of the present application;

[0029] Figure 4 This is a schematic diagram of the NFC current path in the second embodiment of the antenna assembly in the embodiments of the present application;

[0030] FIG5( a ) is a schematic diagram showing the principle of mode 1 excited by the first antenna unit in an embodiment of the present application;

[0031] FIG5( b ) is a schematic diagram showing the principle of mode 2 excited by the first antenna unit in an embodiment of the present application;

[0032] FIG5( c ) is a schematic diagram showing the principle of mode 3 excited by the first antenna unit in an embodiment of the present application;

[0033] FIG5( d ) is a schematic diagram of the principle of mode 4 excited by the first antenna unit in an embodiment of the present application;

[0034] Figure 6 is an S parameter curve diagram of the first antenna unit in the embodiment of the present application;

[0035] Figure 7 This is a schematic diagram of the principle of mode 5 excited by the second antenna unit in the embodiment of the present application;

[0036] Figure 8 is an S parameter curve diagram of the second antenna unit in the embodiment of the present application;

[0037] Fig. 9 This is an efficiency curve diagram of the second antenna unit in the embodiment of the present application;

[0038] Fig.10 is an efficiency curve diagram of the first antenna unit in an embodiment of the present application;

[0039] Fig.11 It is a schematic diagram of the composition structure of the third embodiment of the antenna assembly in the embodiments of the present application;

[0040] Fig.12 Schematic diagram of the layout of the antenna assembly in the electronic device in the embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0042] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0044] It is understood that the terms "first" and "second" used in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0046] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0047] The present application provides an antenna assembly 10. The antenna assembly 10 can be applied to an electronic device 1, which includes but is not limited to a mobile phone, a mobile internet device (MID), an e-book, a portable player station (Play Station Portable, PSP) or a personal digital assistant (Personal Digital Assistant, PDA) and other electronic devices with communication functions.

[0048] Figure 1 FIG. 1 is a schematic diagram of the structure of the first embodiment of the antenna assembly in the present application. Figure 1 As shown, the antenna assembly 10 in the first embodiment may include: a first antenna unit 110 and a second antenna unit 120; wherein,

[0049] The first antenna unit 110 includes a first radiator 111 and a first feed source 11, wherein the first feed source 11 is electrically connected to the first radiator 111 and is used to excite the first radiator 111 to resonate in the first frequency band and the second frequency band;

[0050] The second antenna unit 120 includes a second radiator 121 and a second feed source 12, wherein the second feed source 12 is electrically connected to the second radiator 121 and is used to excite the second radiator 121 to resonate in a third frequency band;

[0051] The first radiator 111 includes a first ground end 1111 and a first free end 1112 , and the second radiator 121 includes a second ground end 1211 and a second free end 1212 ;

[0052] The first free end 1112 of the first radiator 111 and the second free end 1212 of the second radiator 121 are spaced apart to form a gap 1122, and the first radiator 111 and the second radiator 121 are coupled through the gap 1122; the first grounding end 1111 of the first radiator 111 is grounded, and the second grounding end 1211 of the second radiator 121 is grounded;

[0053] The distance between the connection point where the second feed source 12 is electrically connected to the second radiator 121 and the second ground terminal 1211 is greater than the preset distance, and / or the radiator 121121 (such as Figure 1 The width of the second radiator 121 is smaller than the width of the second radiator 121.

[0054] In an exemplary embodiment, the preset distance and the width of the radiator 121121 on the side where the second ground terminal 1211 returns to the ground can be determined according to the actual application scenario. The purpose is to improve the performance of the third frequency band by increasing the distance between the connection point where the second feed source 12 is electrically connected to the second radiator 121 and the second ground terminal 1211, and thinning the radiator on the side where the second ground terminal 1211 returns to the ground.

[0055] In the antenna assembly 10 provided in the embodiment of the present application, on the one hand, the second free end 1212 is spaced apart from the first free end 1112 and forms a coupling gap 1122, so that the first antenna unit 110 can not only utilize the first radiator 111 but also utilize the second radiator 121 when working, so that the first antenna unit 110 can support the first frequency band and the second frequency band, and therefore, the antenna assembly 10 has a better communication effect. Correspondingly, when the second antenna unit 120 is working, not only the second radiator 121 but also the first radiator 111 can be utilized. In other words, the first antenna unit 110 and the second antenna unit 120 are co-aperture antennas. On the other hand, by reasonably designing the distance between the connection point where the second feed source 12 is electrically connected to the second radiator 121 and the second ground terminal 1211, the connection point where the second feed source 12 is electrically connected to the second radiator 121 is further away from the second ground terminal 1211, and the radiator 121121 (such as Figure 1 The width of the antenna 120 (shown as the shaded portion) is smaller than the width of the second radiator 121, that is, the radiator on the ground side of the second ground terminal 1211 is thinned, which significantly improves the performance of the third frequency band, thereby improving the communication performance of the antenna assembly 10.

[0056] In an exemplary embodiment, the first frequency band includes a middle high frequency (MHB) band, the second frequency band includes an ultra high frequency (UHB) band, and the third frequency band includes a GPS band or a low frequency (LB) band. It should be noted that the frequency band range of MHB is 1000MHz-3000MHz, the frequency band range of UHB is 3000MHz-6000MHz, the GPS band may include GPS-L1 band, GPS-L5 band, etc., and the range of LB band is less than 1000MHz. Among them, the LB band may include electromagnetic wave signals of all low frequency bands such as 4G (also known as LTE-LB) and 5G (also known as NR-LB). The MHB band may include electromagnetic wave signals of all middle and high frequency bands such as LTE-MHB and NR-MHB.

[0057] In an exemplary embodiment, Figure 1 As shown, the antenna assembly provided in the embodiment of the present application may also include a first matching circuit M1 and / or a second matching circuit M2; the first feed source 11 is electrically connected to the first radiator 111 through the first matching circuit M1, and the second feed source 12 is electrically connected to the second radiator 121 through the second matching circuit M2.

[0058] In an exemplary embodiment, the first matching circuit M1 is disposed between the first feeding point A and the first feed source 11. In an embodiment, the output end of the first feed source 11 is electrically connected to the input end of the first matching circuit M1, and the output end of the first matching circuit M1 is electrically connected to the first feeding point A of the first radiator 111. The first feed source 11 is used to generate an excitation signal (also called a radio frequency signal), and the first matching circuit M1 is used to filter the clutter of the excitation signal transmitted by the first feed source 11 to form a first radio frequency signal in a first frequency band and a second radio frequency signal in a second frequency band, and transmit the first radio frequency signal and the second radio frequency signal to the first radiator 111 to excite the first radiator 111 to resonate in the first frequency band and the second frequency band.

[0059] In an exemplary embodiment, the second matching circuit M2 is disposed between the second feed point B and the second feed source 12. In an embodiment, the output end of the second feed source 12 is electrically connected to the input end of the second matching circuit M2, and the output end of the second matching circuit M2 is electrically connected to the second feed point B of the second radiator 121. The second feed source 12 is used to generate an excitation signal (also called a radio frequency signal), and the second matching circuit M2 is used to filter the clutter of the excitation signal transmitted by the second feed source 12, form a third radio frequency signal of a third frequency band, and transmit the third radio frequency signal to the second radiator 121, so as to excite the second radiator 121 to resonate in the third frequency band.

[0060] The matching circuits in the embodiments of the present application, such as the first matching circuit M1 and the second matching circuit M2, may include but are not limited to frequency-selective filtering networks such as capacitors, inductors, resistors, etc. arranged in series and / or in parallel. The matching circuit may include branches formed by multiple capacitors, inductors, and resistors connected in series and / or in parallel, and switches for controlling the on and off of multiple branches. By controlling the on and off of different switches, the frequency-selective parameters (such as resistance values, inductance values, and capacitance values) of the matching circuit can be adjusted, and then the filtering range of the matching circuit can be adjusted, so that the matching circuit can obtain the radio frequency signal from the excitation signal emitted by the feed source to which it is connected, and then the antenna transmits the electromagnetic wave signal of the radio frequency signal. Different matching circuits may be different, and their specific circuit implementations are not used to limit the scope of protection of this application. The matching circuit is used to adjust the impedance of the radiator to which it is electrically connected, so that the impedance of the radiator to which it is electrically connected matches the frequency at which it resonates, thereby achieving a larger receiving and transmitting power of the radiator. Therefore, the matching circuit is also called a frequency modulation circuit. By setting a frequency modulation circuit and adjusting the parameters of the frequency modulation circuit, the resonant frequency of each antenna can be moved along the low frequency or high frequency, thereby achieving ultra-wideband of the antenna assembly 10 and increasing the coverage and communication quality of the antenna signal of the antenna assembly 10.

[0061] like Figure 2(a) to Figure 2(h) As shown, they are schematic diagrams of matching circuits in the embodiments of the present application provided in various embodiments.

[0062] As shown in FIG. 2( a ), the matching circuit may include a circuit formed by connecting an inductor L0 and a capacitor C0 in series.

[0063] As shown in FIG. 2( b ), the matching circuit may include a circuit formed by connecting an inductor L0 and a capacitor C0 in parallel.

[0064] As shown in Fig. 2(c), the matching circuit may include an inductor L0, a first capacitor C1 and a second capacitor C2, wherein the inductor L0 is connected in parallel with the first capacitor C1, and the second capacitor C2 is electrically connected to a node where the inductor L0 and the first capacitor C1 are electrically connected.

[0065] As shown in FIG2(d), the matching circuit may include a capacitor C0, a first inductor L1, and a second inductor L2, wherein the capacitor C0 is connected in parallel with the first inductor L1, and the second inductor L2 is electrically connected to a node where the capacitor C0 and the first inductor L1 are electrically connected.

[0066] As shown in FIG2(e), the matching circuit may include an inductor L0, a first capacitor C1 and a second capacitor C2. The inductor L0 is connected in series with the first capacitor C1, and one end of the second capacitor C2 is electrically connected to an end of the inductor L0 that is not connected to the first capacitor C1, and the other end of the second capacitor C2 is electrically connected to an end of the first capacitor C1 that is not connected to the inductor L0.

[0067] As shown in FIG2(f), the matching circuit may include a capacitor C0, a first inductor L1, and a second inductor L2. The capacitor C0 is connected in series with the first inductor L1, one end of the second inductor L2 is electrically connected to an end of the capacitor C0 that is not connected to the first inductor L1, and the other end of the second inductor L2 is electrically connected to an end of the first inductor L1 that is not connected to the capacitor C0.

[0068] As shown in Fig. 2(g), the matching circuit may include a first capacitor C1, a second capacitor C2, a first inductor L1 and a second inductor L2. The first capacitor C1 is connected in parallel with the first inductor L1, the second capacitor C2 is connected in parallel with the second inductor L2, and one end of the whole formed by the second capacitor C2 and the second inductor L2 in parallel is electrically connected to one end of the whole formed by the first capacitor C1 and the first inductor L1 in parallel.

[0069] As shown in Fig. 2(h), the matching circuit may include a first capacitor C1, a second capacitor C2, a first inductor L1 and a second inductor L2. The first capacitor C1 and the first inductor L1 are connected in series to form a first unit circuit, the second capacitor C2 and the second inductor L2 are connected in series to form a second unit circuit, and the first unit circuit and the second unit circuit are connected in parallel.

[0070] In one embodiment, the matching circuit in the embodiment of the present application may also include adjustable devices such as switches and variable capacitors.

[0071] In an exemplary embodiment, the first radiator 111 is a flexible printed circuit (FPC) antenna radiator, a laser direct structuring (LDS) antenna radiator, a printed direct structuring (PDS) antenna radiator, or a metal branch. In an exemplary embodiment, the second radiator 121 is an FPC antenna radiator, an LDS antenna radiator, a PDS antenna radiator, or a metal branch. In an embodiment, the type of the first radiator 111 is the same as the type of the second radiator 121. In an embodiment, the type of the first radiator 111 may be different from the type of the second radiator 121.

[0072] Figure 3 FIG. 1 is a schematic diagram of the structure of the second embodiment of the antenna assembly in the present application. Figure 3 As shown, the antenna assembly provided in the embodiment of the present application may also include a first isolation capacitor C11, a second isolation capacitor C22, a loop inductor L12, and a near field communication (NFC) chip 131; wherein,

[0073] The first isolation capacitor C11 is electrically connected between the first radiator 111 and the first reference ground GND1, that is, the first radiator 111 is electrically connected to the first reference ground GND1 through the first isolation capacitor C11, and the first isolation capacitor C11 is used to isolate the NFC current. In one embodiment, the end of the first radiator 111 away from the gap 1122 is the first ground terminal G1, and the first isolation capacitor C11 is electrically connected between the first ground terminal G1 and the first reference ground GND1.

[0074] The second isolation capacitor C22 is electrically connected between the second radiator 121 and the second reference ground GND2, that is, the second radiator 121 is electrically connected to the second reference ground GND2 through the second isolation capacitor C22, and the second isolation capacitor C22 is used to isolate the NFC current. In one embodiment, the end of the second radiator 121 away from the gap 1122 is the second ground terminal G2, and the second isolation capacitor C22 is electrically connected between the second ground terminal G2 and the second reference ground GND2.

[0075] The loop inductor L12 is electrically connected between a first feeding point A where the first matching circuit M1 is connected to the first radiator 111 and a second feeding point B where the second matching circuit M2 is connected to the second radiator 121. The loop inductor L12 is used to connect the first radiator 111 and the second radiator 121 to form a current path of the NFC antenna. Figure 4 Shown by dotted line.

[0076] A first differential signal port of the NFC chip 131 is connected to a first connection point of the first ground terminal 1111 of the first radiator 111, and a second differential signal port of the NFC chip 131 is connected to a second connection point of the second ground terminal 1211 of the second radiator 121. The NFC chip 131 is used to provide a differential excitation current; a conductive path formed by the radiator portion between the first connection point and the second connection point is used to transmit the differential excitation current generated by the NFC chip.

[0077] In one embodiment, the value of the first isolation capacitor C11 is 100 pF. In one embodiment, the value of the second isolation capacitor C22 is 100 pF.

[0078] In one embodiment, the loop inductance L12 is a large inductance. In one embodiment, the value of the loop inductance L12 is not less than 10 nH.

[0079] The antenna assembly provided in the second embodiment of the present application, on the one hand, the first antenna unit 110 and the second antenna unit 120 are coupled through a gap to form a common-aperture antenna, and because the connection point where the second feed source 12 is electrically connected to the second radiator 121 is farther away from the second ground terminal 1211, and the radiator on the side of the second ground terminal 1211 back to the ground is thinned, the third frequency band performance is improved, thereby improving the communication performance of the antenna assembly 10; on the other hand, through the clever setting of the first isolation capacitor C11, the second isolation capacitor C22 and the loop inductor L12, the connection with the NFC chip is achieved, the NFC current path is formed, and the NFC antenna co-body is realized, and because the value of the loop inductor L12 is large, it will not affect the performance of the first antenna unit 110 and the second antenna unit 120.

[0080] In an exemplary embodiment, the first antenna (Ant1) (corresponding to the first feed source 11) operates in the MHB+UHB frequency band, the first reference ground GND1 is the return ground of Ant1, the first isolation capacitor C11 is 100pF, and is used to isolate the NFC current, the second antenna (Ant2) (corresponding to the first feed source 12) operates in the GPS-L5 frequency band, the second reference ground GND2 is the return ground of Ant2, the second isolation capacitor C22 is 100pF, and is used to isolate the NFC current, and the first matching circuit M1 of Ant1 is connected to the second matching circuit M2 of Ant2 through a larger loop inductance L12 such as greater than 10nH to connect Ant1 and Ant12 to form a current path of the NFC antenna.

[0081] Taking the antenna assembly of the second embodiment of the present application as an example, the working principle of Ant1 is as follows: Figure 5(a) to Figure 5(d) As shown in the figure, they represent the four main modes excited by Ant1, as shown by the thick arrows in the figure. Figure 6 , Figure 6 for Figure 3 The schematic diagram of the return loss curve of the antenna assembly Ant1 transmitting and / or receiving the electromagnetic wave signal of the first frequency band and the second frequency band is shown in FIG. Figure 6 In the figure, the horizontal axis is frequency, in MHz; the vertical axis is return loss (RL), in dB. As shown in Figure 5(a), mode 1 is a quarter-wavelength mode from the first reference ground GND1 to the slot 1122, which is used to support the transmission and / or reception of electromagnetic wave signals in the first sub-band. For the convenience of illustration, Figure 6 5(b), mode 2 is: a one-eighth to a quarter wavelength mode from the second reference ground GND2 to the slot 1122, and a strong current is coupled to the ground under the first reference ground GND1 through the slot 1122, which is used to support the transmission and / or reception of electromagnetic wave signals in the second sub-band. For the convenience of illustration, Figure 65(c), mode 3 is: a quarter-wavelength mode from the first feed source 11 to the slot 1122, and a strong current is connected to the ground from the first reference ground GND1 to support the transmission and / or reception of electromagnetic wave signals in the third sub-band. For the convenience of illustration, Figure 6 5(d), mode 4 is: a quarter-wavelength mode from the second feed source 12 to the slot 1122, and a strong current is sent to the ground from the first feed source 11 to support the transmission and / or reception of electromagnetic wave signals in the fourth sub-band. For the convenience of illustration, Figure 6 In one embodiment, Figure 6 As shown, the four main modes excited by Ant1 in the embodiment of the present application, namely mode 1 to mode 4, can cover the MHB frequency band and the UHB frequency band, such as B1 / B2 / B3 / B4 / B7 / B32 / B39 / B40 / B41, WIFI2.4G, N41 / N 77 / N 78 / N 79 and other frequency bands.

[0082] Taking the antenna assembly of the second embodiment of the present application as an example, the working principle of Ant2 is as follows: Figure 7 As shown, it means that Ant2 excites mode 5, as shown by the thick arrow line in the figure. Figure 8 , Figure 8 for Figure 3 A schematic diagram of a return loss curve of the antenna assembly Ant2 transmitting and / or receiving an electromagnetic wave signal in a third frequency band is shown. Figure 8 In the figure, the horizontal axis is frequency in MHz, and the vertical axis is RL in dB. Figure 7 As shown, mode 5 is Ant2 stimulated by composite right / left-handed (CRLH). Figure 8 In one embodiment, Figure 8 As shown, Mode 5 excited by Ant2 in the embodiment of the present application can cover the GPS-L5 frequency band.

[0083] In an exemplary embodiment, in the antenna assembly provided in the embodiment of the present application, by reasonably designing the distance between the connection point where the second feed source 12 is electrically connected to the second radiator 121 and the second ground terminal 1211, the connection point where the second feed source 12 is electrically connected to the second radiator 121 is further away from the second ground terminal 1211, and the radiator 121121 (such as Figure 1 The width of the antenna 120 is smaller than the width of the second radiator 121, that is, the radiator on the ground side of the second ground terminal 1211 is thinned, which significantly improves the performance of the third frequency band, thereby improving the communication performance of the antenna assembly 10. Fig. 9As shown, taking the third frequency band as the GPS-L5 frequency band as an example, the efficiency of GPS-L5 in the antenna assembly provided in the embodiment of the present application is -6.5dB, which is much higher than -8 to -10dB in the related art.

[0084] In an exemplary embodiment, the efficiency of the first antenna unit 110 in the antenna assembly provided by the embodiment of the present application is as follows: Fig.10 As shown, combined Fig. 9 The efficiency of the second antenna unit 120 in the antenna assembly provided in the embodiment of the present application is shown. The antenna assembly provided in the second embodiment of the present application not only realizes the NFC antenna coexistence, but also does not affect the performance of the first antenna unit 110 and the second antenna unit 120; moreover, since the connection point between the second feed source 12 and the second radiator 121 is electrically connected farther away from the second ground terminal 1211, and the radiator on the side of the second ground terminal 1211 back to the ground is thinned, the performance of the third frequency band is also improved, thereby improving the communication performance of the antenna assembly 10.

[0085] In an exemplary embodiment, in the antenna assembly 10 provided in the embodiment of the present application, in addition to the first antenna unit 110 and the second antenna unit 120, which are two radiators and the NFC body, more antenna units and radiators can be further added to be coexistent with the NFC body. Fig.11 As shown, the third radiator 141 and / or the fourth radiator 151 are added to the outside of the first ground terminal 1111 of the first radiator 111 and / or the second ground terminal 1211 of the second radiator 121. In one embodiment, in order to better ensure the isolation between the first antenna unit 110 and the second antenna unit 120 and the newly added antenna unit, a third ground terminal G3 and / or a fourth ground terminal G4 can be added to the outside of the first ground terminal G1 and / or the second ground terminal G2. The third ground terminal G3 can be electrically connected to the third reference ground GND3 through the third isolation capacitor C33, and the fourth ground terminal G4 can be electrically connected to the fourth reference ground GND4 through the fourth isolation capacitor C44. In one embodiment, the first ground terminal G1 and the third ground terminal G3 can also be directly electrically connected to the first reference ground GND1 and the third reference ground GND3, respectively.

[0086] The embodiment of the present application also provides an electronic device, including any of the antenna components described above. For example, the electronic device may include, but is not limited to: a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a personal digital assistant (PDA), a network attached storage (NAS Network Attached Storage), a personal computer (PC), a television, an ATM or an automatic machine, etc., and the embodiment of the present application does not make specific limitations. Taking the electronic device 1 as a mobile phone as an example, Fig.12 FIG. 1 is a schematic diagram of the layout of the antenna assembly in the electronic device according to an embodiment of the present application. Fig.12 As shown, the first antenna unit 110 is arranged at the top, and the second antenna unit 120 is arranged at the upper corner. Fig.12 In the example, Ant1 corresponds to the first feed source 11, and Ant2 corresponds to the second feed source 12. It should be noted that: Fig.12 This is just an example. The layout of the antenna assembly 10 on the electronic device can be adjusted according to actual conditions. Fig.12 It is not intended to limit the protection scope of this application.

[0087] The electronic device provided in the embodiment of the present application is provided with the antenna assembly 10 provided in any embodiment of the present application, so that the electronic device realizes multi-antenna coexistence, improves the communication quality, and is conducive to the overall miniaturization of the electronic device.

[0088] Although the embodiments disclosed in this application are as above, the contents described are only embodiments adopted to facilitate understanding of this application and are not intended to limit this application. Any technician in the field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application, but the scope of patent protection of this application shall still be based on the scope defined in the attached claims.

Claims

1. An antenna assembly, characterized in that: include: A first antenna unit and a second antenna unit; wherein, The first antenna unit includes a first radiator and a first feed source, wherein the first feed source is electrically connected to the first radiator and is used to excite the first radiator to resonate in the first frequency band and the second frequency band; The second antenna unit includes a second radiator and a second feed source, wherein the second feed source is electrically connected to the second radiator and is used to excite the second radiator to resonate in a third frequency band; The first radiator includes a first grounding end and a first free end, and the second radiator includes a second grounding end and a second free end; the first free end and the second free end are spaced apart to form a gap, and the first radiator and the second radiator are coupled through the gap; the first grounding end is grounded, and the second grounding end is grounded; The distance between the connection point where the second feed source is electrically connected to the second radiator and the second grounding end is greater than a preset distance, and / or the width of the radiator on the ground return side of the second grounding end is smaller than the width of the second radiator; The first radiator has a first feeding point; the first antenna unit further includes: a first matching circuit arranged between the first feeding point and the first feed source; the first matching circuit is used to filter the clutter of the excitation signal transmitted by the first feed source to form a first radio frequency signal in the first frequency band and a second radio frequency signal in the second frequency band, and transmit the first radio frequency signal and the second radio frequency signal to the first radiator to excite the first radiator to resonate in the first frequency band and the second frequency band; The second radiator has a second feeding point; the second antenna unit further includes: a second matching circuit arranged between the second feeding point and the second feed source; the second matching circuit is used to filter the clutter of the excitation signal transmitted by the second feed source, form a third radio frequency signal of the third frequency band and transmit the third radio frequency signal to the second radiator to excite the second radiator to resonate in the third frequency band; It also includes: a second isolation capacitor, a loop inductor, and a near field communication NFC chip; wherein, The second isolation capacitor is electrically connected between the second radiator and the second reference ground, and the second isolation capacitor is used to isolate the NFC current; the second reference ground is the return ground of the second antenna unit; The loop inductor is electrically connected between a first feeding point where the first matching circuit is connected to the first radiator, and a second feeding point where the second matching circuit is connected to the second radiator, and the loop inductor is used to connect the first radiator and the second radiator to form a current path of the NFC antenna; A first differential signal port of the NFC chip is connected to a first connection point of the first ground terminal, a second differential signal port of the NFC chip is connected to a second connection point of the second ground terminal, and the NFC chip is used to provide a differential excitation current; and a conductive path formed by the radiator part between the first connection point and the second connection point is used to transmit the differential excitation current generated by the NFC chip.

2. The antenna assembly according to claim 1, wherein: The first frequency band includes a medium-high frequency MHB frequency band, the second frequency band includes an ultra-high frequency UHB frequency band, and the third frequency band includes a GPS-L5 frequency band or a GPS-L1 frequency band or a low-frequency LB frequency band.

3. The antenna assembly according to claim 1, further comprising: A first isolation capacitor; The first isolation capacitor is electrically connected between the first radiator and the first reference ground, and the first isolation capacitor is used to isolate the NFC current; The first reference ground is the return ground of the first antenna unit.

4. The antenna assembly according to claim 3, wherein: The value of the first isolation capacitor is 100 pF; the value of the second isolation capacitor is 100 pF; and the loop inductance is a large inductance.

5. The antenna assembly according to claim 4, wherein: The value of the loop inductance is not less than 10nH.

6. The antenna assembly according to claim 3, further comprising: a third radiator extending outwardly of the first ground end of the first radiator; and / or, A fourth radiator extends outwardly of the second ground end of the second radiator.

7. The antenna assembly according to claim 6, further comprising: A third grounding terminal for grounding arranged outside the first grounding terminal; and / or a fourth grounding terminal for grounding arranged outside the second grounding terminal.

8. The antenna assembly according to claim 7, in the case of including the fourth radiator, the antenna assembly further comprises: a fourth isolation capacitor; The fourth ground terminal is electrically connected to a fourth reference ground through the fourth isolation capacitor.

9. The antenna assembly according to claim 8, in the case of including the third radiator, the antenna assembly further comprises: The third isolation capacitor; The third ground terminal is electrically connected to a third reference ground through the third isolation capacitor.

10. The antenna assembly according to claim 1, 3 or 6, wherein: The first ground terminal is grounded through a first reference ground; the first antenna unit is used to generate: The quarter-wavelength pattern from the first reference ground to the slot is used to support transmission and / or reception of electromagnetic wave signals in a first sub-frequency band; A one-eighth to a quarter wavelength mode from the second reference ground to the slot, and a current coupled to the first reference ground through the slot, for supporting transmission and / or reception of electromagnetic wave signals in a second sub-frequency band; A quarter wavelength mode from the first feed source to the slot, and a current flowing from the first reference ground to ground, for supporting transmission and / or reception of electromagnetic wave signals in a third sub-band; A quarter-wavelength mode from the second feed source to the slot, and a current flowing from the first feed source to the ground, is used to support the transmission and / or reception of electromagnetic wave signals in a fourth sub-frequency band.

11. The antenna assembly according to claim 10, wherein: The mode covers B1 / B2 / B3 / B4 / B7 / B32 / B39 / B40 / B41, WIFI2.4G, N41 / N 77 / N 78 / N 79 frequency bands.

12. The antenna assembly according to claim 1, 3 or 6, wherein: The second ground terminal is grounded via a second reference ground; and the mode of the second antenna unit is excited in a composite left-right-handed CRLH form.

13. The antenna assembly according to claim 12, wherein: The mode covers the GPS-L5 frequency band or the GPS-L1 frequency band or the LB frequency band.

14. An electronic device, characterized in that: The invention comprises the antenna assembly according to any one of claims 1 to 13.

15. The electronic device according to claim 14, wherein: The first antenna unit in the antenna assembly is arranged at the top of the electronic device, and the second antenna unit in the antenna assembly is arranged at the upper corner of the electronic device.

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