Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly and electronic equipment. The antenna assembly comprises a feed source, an antenna radiator, a tuning circuit, a first parasitic branch knot and a second parasitic branch knot, the antenna radiator is provided with a first free end, a second free end and a feeding point, the tuning circuit is electrically connected between the feeding point and the feed source, and the antenna radiator between the feeding point and the first free end is used for supporting a first frequency band. The first parasitic branch comprises a third free end and a first grounding end, a first coupling gap is formed between the third free end and the first free end, the first parasitic branch is used for supporting a second frequency band and a third frequency band, and the second parasitic branch comprises a fourth free end and a second grounding end; a second coupling gap is formed between the fourth free end and the second free end, and the antenna radiator among the second parasitic branch knot, the feeding point and the second free end is used for supporting a fourth frequency band. According to the antenna assembly and the electronic equipment provided by the invention, the deswitching design can be realized, and the bandwidth is relatively wide.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to an antenna assembly and an electronic device. Background Art

[0002] In the related art, in order to achieve multi-frequency and broadband performance, the antenna assembly of the electronic device needs to introduce more switches for switching, and the achievable bandwidth is still relatively narrow. Summary of the invention

[0003] The present application provides a switch-free, wide-band antenna assembly and electronic equipment.

[0004] In one aspect, the present application provides an antenna assembly, comprising:

[0005] An antenna unit, comprising a feed source, an antenna radiator and a tuning circuit, wherein the antenna radiator has a first free end, a second free end and a feeding point located between the first free end and the second free end, the tuning circuit is electrically connected between the feeding point and the feed source, and the antenna radiator between the feeding point and the first free end is used to generate a first resonant mode supporting a first frequency band under the excitation of the feed source;

[0006] a first parasitic branch, located at one side of the antenna radiator, the first parasitic branch comprising a third free end and a first grounding end, a first coupling gap being formed between the third free end and the first free end, the first grounding end being grounded, the first parasitic branch being used to generate a second resonance mode supporting a second frequency band under the excitation of the feed source, and being used to generate a third resonance mode supporting a third frequency band under the excitation of the feed source; and

[0007] A second parasitic branch is located on the other side of the antenna radiator, the second parasitic branch includes a fourth free end and a second ground end, a second coupling gap is formed between the fourth free end and the second free end, the second ground end is grounded, and the antenna radiator between the second parasitic branch, the feeding point and the second free end is used to generate a fourth resonant mode supporting a fourth frequency band under the excitation of the feed source.

[0008] On the other hand, the present application also provides an electronic device, including a middle frame assembly, a circuit board assembly and the antenna assembly, the middle frame assembly includes a frame, the antenna radiator, the first parasitic branch and the second parasitic branch are all arranged on the frame, the circuit board assembly includes at least one circuit board, and the feed source and the tuning circuit are both arranged on the circuit board.

[0009] The antenna assembly provided in the present application includes an antenna unit, a first parasitic branch and a second parasitic branch. The antenna unit includes a feed source, an antenna radiator and a tuning circuit. The antenna radiator has a first free end, a second free end and a feeding point located between the first free end and the second free end. The tuning circuit is electrically connected between the feeding point and the feed source. The first parasitic branch includes a third free end and a first grounding end. A first coupling gap is formed between the third free end and the first free end. The first grounding end is grounded. The second parasitic branch includes a fourth free end and a second grounding end. A second coupling gap is formed between the fourth free end and the second free end. The second grounding end is grounded. The antenna radiator is used to generate a first resonance mode supporting a first frequency band under the excitation of a feed source, the first parasitic branch is used to generate a second resonance mode supporting a second frequency band under the excitation of the feed source, and is used to generate a third resonance mode supporting a third frequency band under the excitation of the feed source, and the antenna radiator between the second parasitic branch, the feeding point and the second free end is used to generate a fourth resonance mode supporting a fourth frequency band under the excitation of the feed source, that is, through the tuning action of a feed source and a tuning circuit, the antenna component can simultaneously generate four resonance modes to simultaneously support four frequency bands, so that the bandwidth of the antenna component can be broadened while the antenna component can achieve a de-switching design. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments are briefly introduced below.

[0011] Figure 1 A schematic diagram of the structure of an antenna assembly provided in an embodiment of the present application;

[0012] Figure 2 for Figure 1 A schematic diagram of a distribution of resonant current when the antenna assembly generates a resonant mode;

[0013] Figure 3 for Figure 1 A schematic diagram of current distribution of the antenna assembly in the first resonance mode;

[0014] Figure 4 for Figure 1 A schematic diagram of current distribution of the antenna assembly shown in the second resonance mode;

[0015] Figure 5 for Figure 1 A schematic diagram of current distribution of the antenna assembly in the third resonance mode;

[0016] Figure 6 for Figure 1 A schematic diagram of current distribution of the antenna assembly shown in the fourth resonance mode;

[0017] Figure 7 for Figure 1 The tuning circuit of the antenna assembly shown includes a schematic diagram of a structure of a first sub-tuning circuit and a second sub-tuning circuit;

[0018] Figure 8 for Figure 1 Another schematic diagram of the distribution of the resonant current when the antenna assembly generates a resonant mode;

[0019] Fig. 9 for Figure 1 A schematic diagram of current distribution of the antenna assembly shown in the fifth resonance mode;

[0020] Fig.10 for Figure 1 The antenna assembly shown also includes a schematic diagram of the structure of the matching circuit;

[0021] Fig.11 A return loss curve (S11) of the antenna assembly provided in an embodiment of the present application;

[0022] Fig.12 An efficiency curve diagram of the antenna assembly provided in an embodiment of the present application;

[0023] Fig.13 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0024] Fig.14 Another schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0025] Description of reference numerals:

[0026] Antenna assembly 100; antenna unit 10; first parasitic branch 20; second parasitic branch 30; feed source 101; antenna radiator 102; tuning circuit 103; first free end A; second free end B; feeding point C; third free end D; first grounding end E; fourth free end F; second grounding end G; first coupling gap 40; second coupling gap 50; first sub-tuning circuit 131; second sub-tuning circuit 132; matching circuit 60; electronic device 1000; frame 70; circuit board 80; first sub-frame 701; second sub-frame 702; third sub-frame 703; fourth sub-frame 704. DETAILED DESCRIPTION

[0027] The technical solution provided by the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments described in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0028] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0029] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish different objects rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device comprising one or more parts is not limited to the one or more parts listed, but may optionally include one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described functions. In addition, the terms "end" and "point" in the specification and claims of the present application may indicate a small section relative to the radiator or branch as a whole, that is, "end" cannot be narrowly understood as the end, and "point" cannot be narrowly understood as a point.

[0030] like Figure 1 As shown, Figure 1 A schematic diagram of the structure of an antenna assembly 100 provided in an embodiment of the present application. The antenna assembly 100 includes an antenna unit 10, a first parasitic branch 20 and a second parasitic branch 30. The antenna unit 10 includes a feed source 101, an antenna radiator 102 and a tuning circuit 103.

[0031] The feed source 101 is electrically connected to the RF chip and to the antenna radiator 102. The feed source 101 receives the RF current provided by the RF chip to excite the antenna radiator 102 to generate a corresponding resonant current. The feed source 101 and the RF chip can be directly electrically connected, or they can be indirectly electrically connected. For example: the feed source 101 and the RF chip can be directly electrically connected by direct welding, or the feed source 101 and the RF chip can be indirectly electrically connected by at least one electrical connector such as a coaxial line, a microstrip line, a conductive spring, a conductive glue, and a circuit board. In the embodiment of the present application, the RF chip is arranged on the circuit board, and the RF chip is used to provide RF current. The feed source 101 can be understood as a port arranged on the circuit board and close to the antenna radiator 102, and the feed source 101 is indirectly electrically connected to the RF chip. Among them, the way in which the RF chip is arranged on the circuit board includes but is not limited to the RF chip being directly formed on the circuit board, or the RF chip being fixed on the circuit board after being formed. The feed source 101 and the RF chip can be located on the same circuit board, or they can be located on different circuit boards.

[0032] The antenna radiator 102 is a conductor with a specific size. This embodiment does not specifically limit the length of the antenna radiator 102, and it can be designed according to the actual supported frequency band and other environmental factors. The material of the antenna radiator 102 includes but is not limited to metal, or alloy, etc. The shape of the antenna radiator 102 includes but is not limited to strip, or sheet, or rod, or coating, or film, etc. The extension method of the antenna radiator 102 includes but is not limited to straight extension, or curve extension, or bending extension, etc. The width of the antenna radiator 102 can be uniform, or gradual, or abrupt. The antenna radiator 102 can be a built-in radiator, or it can be an external radiator. When the antenna radiator 102 is a built-in radiator, the form of the antenna radiator 102 includes but is not limited to a radiator formed on a flexible printed circuit board (Flexible Printed Circuit board, FPC), or a radiator formed by laser direct structuring (Laser Direct Structuring, LDS), or a radiator formed by printing direct structuring (Print Direct Structuring, PDS), etc. When the antenna radiator 102 is an external radiator, the form of the antenna radiator 102 includes but is not limited to a metal frame radiator.

[0033] The antenna radiator 102 has a first free end A, a second free end B, and a feeding point C located between the first free end A and the second free end B.

[0034] The first free end A is one end of the antenna radiator 102 along its length. The second free end B is the other end of the antenna radiator 102 along its length. The feeding point C is the position where the antenna radiator 102 is electrically connected to the feed source 101, that is, the feeding point C is the position where the antenna radiator 102 receives the excitation signal. It can be understood that the first free end A, the feeding point C and the second free end B are arranged in sequence. The feeding point C being located between the first free end A and the second free end B may include the feeding point C being relatively close to the first free end A, that is, the length of the antenna radiator 102 between the feeding point C and the first free end A is less than the length of the antenna radiator 102 between the feeding point C and the second free end B; or, the feeding point C may be located at the midpoint between the first free end A and the second free end B, that is, the length of the antenna radiator 102 between the feeding point C and the first free end A is equal to the length of the antenna radiator 102 between the feeding point C and the second free end B; or, the feeding point C may be relatively close to the second free end B, that is, the length of the antenna radiator 102 between the feeding point C and the second free end B is less than the length of the antenna radiator 102 between the feeding point C and the first free end A.

[0035] The feeding point C is electrically connected to the feed source 101. In the embodiment of the present application, the feeding point C and the feed source 101 are electrically connected via a tuning circuit 103. In other words, the tuning circuit 103 is electrically connected between the feeding point C and the feed source 101. The tuning circuit 103 includes at least one inductor element and / or at least one capacitive element. Among them, the tuning circuit 103 and the feeding point C can be directly electrically connected, or can be indirectly electrically connected. For example: the tuning circuit 103 and the feeding point C can be directly electrically connected by direct welding, or the tuning circuit 103 and the feeding point C can be indirectly electrically connected by at least one electrical connector such as a conductive wire, a conductive spring, a conductive probe, a conductive glue, etc. The tuning circuit 103 and the feed source 101 can be directly electrically connected, or can be indirectly electrically connected. For example, the tuning circuit 103 and the feed source 101 may be directly electrically connected by direct welding, or the tuning circuit 103 and the feed source 101 may be indirectly electrically connected by at least one electrical connector such as a conductive wire, a conductive spring, a conductive probe, or a conductive glue.

[0036] like Figure 2 As shown, Figure 2 for Figure 1 Schematic diagram of the distribution of the resonant current when the antenna assembly generates a resonant mode. The antenna radiator 102 between the feed point C and the first free end A is used to generate a first resonant mode supporting a first frequency band under the excitation of the feed source 101. It can be understood that the resonant current of the first resonant mode is mainly distributed on the antenna radiator 102 between the feed point C and the first free end A. In the embodiment of the present application, the distribution of the resonant current of the first resonant mode can be referred to in the attached Figure 2 As shown in I1.

[0037] The first parasitic branch 20 is a conductor with a specific size. The length of the first parasitic branch 20 is not specifically limited in this embodiment, and can be designed according to the frequency band actually supported and other environmental factors. The material of the first parasitic branch 20 includes but is not limited to metal, or alloy, etc. The material of the first parasitic branch 20 can be the same as or different from the material of the antenna radiator 102. The shape of the first parasitic branch 20 includes but is not limited to strip, or sheet, or rod, or coating, or film, etc. The shape of the first parasitic branch 20 can be the same as or different from the shape of the antenna radiator 102. The extension mode of the first parasitic branch 20 includes but is not limited to straight extension, or curve extension, or bending extension, etc. The extension mode of the first parasitic branch 20 can be the same as or different from the extension mode of the antenna radiator 102. The width of the first parasitic branch 20 can be uniform, or gradual, or sudden. The width change of the first parasitic branch 20 can be the same as or different from the width change of the antenna radiator 102. The first parasitic branch 20 may be a built-in branch or an external branch. When the first parasitic branch 20 is a built-in branch, the form of the first parasitic branch 20 includes but is not limited to an FPC branch, or an LDS branch, or a PDS branch, etc. When the first parasitic branch 20 is an external branch, the form of the first parasitic branch 20 includes but is not limited to a metal frame branch. Optionally, when the antenna radiator 102 is a built-in radiator, the first parasitic branch 20 may be a built-in branch; when the antenna radiator 102 is an external radiator, the first parasitic branch 20 may be an external branch.

[0038] The first parasitic branch 20 is located at one side of the antenna radiator 102. The first parasitic branch 20 includes a third free end D and a first grounding end E. A first coupling gap 40 is formed between the third free end D and the first free end A. The first grounding end E is grounded.

[0039] In the present application embodiment, Figure 1 In the perspective shown, the first parasitic branch 20 is located on the left side of the antenna radiator 102. Of course, in other possible embodiments, Figure 1The first parasitic branch 20 may also be located on the right side of the antenna radiator 102 from the perspective shown. The third free end D is one end of the first parasitic branch 20 along its length direction, and the first grounding end E is the other end of the first parasitic branch 20 along its length direction. The third free end D is closer to the antenna radiator 102 than the first grounding end E. The first parasitic branch 20 is coupled to the antenna radiator 102 through the first coupling gap 40. In other words, the first parasitic branch 20 and the antenna radiator 102 can transmit radiation energy through the first coupling gap 40. The size range of the first coupling gap 40 may be 0.5 mm to 3 mm, that is, the spacing range between the third free end D and the first free end A may be 0.5 mm to 3 mm. The grounding of the first grounding end E can be understood as the first grounding end E being electrically connected to the reference ground. The first grounding end E and the reference ground may be directly electrically connected, or may be indirectly electrically connected. For example, the first ground terminal E and the reference ground can be directly electrically connected by direct welding, or the first ground terminal E and the reference ground can be indirectly electrically connected by at least one electrical connection member such as a conductive wire, a conductive spring, a conductive probe, or a conductive glue. The relative potential of the reference ground is zero. The reference ground can be a port, a metal plate, or the like.

[0040] like Figure 2 As shown, the first parasitic branch 20 is used to generate a second resonance mode supporting a second frequency band under the excitation of the feed source 101, and is used to generate a third resonance mode supporting a third frequency band under the excitation of the feed source 101. It can be understood that the resonant current of the second resonance mode is mainly distributed on the first parasitic branch 20 between the third free end D and the first ground end E; the resonant current of the third resonance mode is mainly distributed on the first parasitic branch 20 between the third free end D and the first ground end E. In the embodiment of the present application, the distribution of the resonant current of the second resonance mode can be referred to in the attached Figure 2 As shown in I2, the distribution of the resonant current in the third resonant mode can be referred to in the attached Figure 2 As shown in I3. Among them, the third resonance mode, the second resonance mode, and the first resonance mode exist at the same time, that is, the antenna assembly 100 can support the third frequency band, the second frequency band, and the first frequency band at the same time. The third frequency band, the second frequency band, and the first frequency band are different.

[0041] The second parasitic branch 30 is a conductor with a specific size. The length of the second parasitic branch 30 is not specifically limited in this embodiment, and can be designed according to the actual supported frequency band and other environmental factors. The material of the second parasitic branch 30 includes but is not limited to metal, or alloy, etc. The material of the second parasitic branch 30 can be the same as or different from the material of the antenna radiator 102. The shape of the second parasitic branch 30 includes but is not limited to strip, or sheet, or rod, or coating, or film, etc. The shape of the second parasitic branch 30 can be the same as or different from the shape of the antenna radiator 102. The extension mode of the second parasitic branch 30 includes but is not limited to straight extension, or curve extension, or bending extension, etc. The extension mode of the second parasitic branch 30 can be the same as or different from the extension mode of the antenna radiator 102. The width of the second parasitic branch 30 can be uniform, or gradual, or sudden. The width change of the second parasitic branch 30 can be the same as or different from the width change of the antenna radiator 102. The second parasitic branch 30 may be a built-in branch or an external branch. When the second parasitic branch 30 is a built-in branch, the form of the second parasitic branch 30 includes but is not limited to an FPC branch, or an LDS branch, or a PDS branch, etc. When the second parasitic branch 30 is an external branch, the form of the second parasitic branch 30 includes but is not limited to a metal frame branch. Optionally, when the antenna radiator 102 is a built-in radiator, the second parasitic branch 30 may be a built-in branch; when the antenna radiator 102 is an external radiator, the second parasitic branch 30 may be an external branch.

[0042] The second parasitic branch 30 is located at the other side of the antenna radiator 102. The second parasitic branch 30 includes a fourth free end F and a second ground end G, a second coupling gap 50 is formed between the fourth free end F and the second free end B, and the second ground end G is grounded.

[0043] In the present application embodiment, Figure 1 The second parasitic branch 30 is located on the right side of the antenna radiator 102 in the perspective shown. Of course, in other possible embodiments, Figure 1The second parasitic branch 30 may also be located on the left side of the antenna radiator 102 from the perspective shown. The fourth free end F is one end of the second parasitic branch 30 along its length direction, and the second ground end G is the other end of the second parasitic branch 30 along its length direction. The fourth free end F is closer to the antenna radiator 102 than the second ground end G. The second parasitic branch 30 is coupled to the antenna radiator 102 through the second coupling gap 50. In other words, the second parasitic branch 30 and the antenna radiator 102 can transmit radiation energy through the second coupling gap 50. Among them, the size range of the second coupling gap 50 can be 0.5mm~3mm, that is, the spacing range between the fourth free end F and the second free end B can be 0.5mm~3mm. The size of the second coupling gap 50 can be the same as or different from the size of the first coupling gap 40. The grounding of the second ground end G can be understood as the second ground end G being electrically connected to the reference ground. The second ground end G can be directly electrically connected to the reference ground, or can be indirectly electrically connected. For example: the second ground terminal G can be directly electrically connected to the reference ground by direct welding, or the second ground terminal G can be indirectly electrically connected to the reference ground by at least one electrical connector such as a conductive wire, a conductive spring, a conductive probe, or a conductive glue.

[0044] like Figure 2 As shown, the second parasitic branch 30, the antenna radiator 102 between the feeding point C and the second free end B are used to generate a fourth resonance mode supporting a fourth frequency band under the excitation of the feed source 101. It can be understood that the resonant current of the fourth resonance mode is mainly distributed on the second parasitic branch 30 between the fourth free end F and the second ground end G, and the antenna radiator 102 between the feeding point C and the second free end B. In the embodiment of the present application, the distribution of the resonant current of the fourth resonance mode can be referred to in the attached Figure 2 As shown in I4.

[0045] Among them, the fourth resonance mode, the third resonance mode, the second resonance mode, and the first resonance mode exist at the same time, that is, the antenna assembly 100 can support the fourth frequency band, the third frequency band, the second frequency band, and the first frequency band at the same time. The fourth frequency band, the third frequency band, the second frequency band, and the first frequency band are different.

[0046] The antenna assembly 100 provided in the present application includes an antenna unit 10, a first parasitic branch 20 and a second parasitic branch 30. The antenna unit 10 includes a feed source 101, an antenna radiator 102 and a tuning circuit 103. The antenna radiator 102 has a first free end A, a second free end B and a feeding point C located between the first free end A and the second free end B. The tuning circuit 103 is electrically connected between the feeding point C and the feed source 101. The first parasitic branch 20 includes a third free end D and a first grounding end E. A first coupling gap 40 is formed between the third free end D and the first free end A. The first grounding end E is grounded. The second parasitic branch 30 includes a fourth free end F and a second grounding end G. A second coupling gap 50 is formed between the fourth free end F and the second free end B. The second grounding end G is grounded. The feeding point C is connected to the first free end A. The antenna radiator 102 between the first free end A is used to generate a first resonance mode supporting a first frequency band under the excitation of the feed source 101, the first parasitic branch 20 is used to generate a second resonance mode supporting a second frequency band under the excitation of the feed source 101, and is used to generate a third resonance mode supporting a third frequency band under the excitation of the feed source 101, and the antenna radiator 102 between the second parasitic branch 30, the feed point C and the second free end B is used to generate a fourth resonance mode supporting a fourth frequency band under the excitation of the feed source 101, that is, through the tuning action of a feed source 101 and a tuning circuit 103, the antenna component 100 can simultaneously generate four resonance modes to simultaneously support four frequency bands, so that the bandwidth of the antenna component 100 can be broadened while the antenna component 100 can achieve a de-switching design.

[0047] In a possible embodiment, the first frequency band and the second frequency band are both located at low frequencies, and the second frequency band is higher than the first frequency band; the third frequency band and the fourth frequency band are both located at medium and high frequencies, and the third frequency band is higher than the fourth frequency band.

[0048] Among them, low frequency includes frequency bands less than 1GHz. For example, low frequency can include 4G B5 band (uplink 824MHz ~ 849MHz; downlink 869MHz ~ 894MHz), B8 band (uplink 880MHz ~ 915MHz; downlink 925MHz ~ 960MHz), B20 band (uplink 832MHz ~ 862MHz; downlink 791MHz ~ 821MHz), B28 band (uplink 703MHz ~ 748MHz; downlink 758MHz ~ 803MHz); and 5G N5 band (uplink 824MHz ~ 849MHz; downlink 859MHz ~ 894MHz), N8 band (uplink 880MHz~915MHz; downlink 925MHz~960MHz), N13 band (uplink 777MHz~787MHz; downlink 746MHz~756MHz), N20 band (uplink 832MHz~862MHz; downlink 791MHz~821MHz), N26 band (uplink 814MHz~849MHz; downlink 758MHz~803MHz), N28 band (uplink 703MHz~748MHz; downlink 758MHz~803MHz), etc. Optionally, the first frequency band may include at least one of the B5 band, the B8 band, the B20 band, the B28 band, the N5 band, the N8 band, the N13 band, the N20 band, the N26 band, and the N28 band. Optionally, the second frequency band may include at least one of a B5 band, a B8 band, a B20 band, a B28 band, a N5 band, a N8 band, a N13 band, a N20 band, a N26 band, and a N28 band.

[0049] The second frequency band being higher than the first frequency band can be understood as the center frequency of the second frequency band being higher than the center frequency of the first frequency band; or, the maximum frequency of the second frequency band being higher than the maximum frequency of the first frequency band; or, the minimum frequency of the second frequency band being higher than the maximum frequency of the first frequency band. In the following embodiments, the center frequency of the second frequency band being higher than the center frequency of the first frequency band is taken as an example. In a possible embodiment, the center frequency of the first frequency band may be 0.75 GHz, and the center frequency of the second frequency band may be 0.94 GHz. In this embodiment, the first frequency band may include the B28 frequency band, and the second frequency band may include the B8 frequency band.

[0050] The medium and high frequencies include the frequency bands between 1 GHz and 3 GHz. For example, the medium and high frequencies may include 4G's B1 band (uplink 1.92GHz ~ 1.98GHz; downlink 2.11GHz ~ 2.17GHz), B2 band (uplink 1.85GHz ~ 1.91GHz; downlink 1.93GHz ~ 1.99GHz), B3 band (uplink 1.71GHz ~ 1.785GHz; downlink 1.805GHz ~ 1.88GHz), B4 band (uplink 1.71GHz ~ 1.755GHz; downlink 2.11GHz ~ 2.155GHz), B7 band (uplink 2.5GHz ~ 2.57GHz; downlink 2.62GHz ~ 2.69GHz), B34 band (2.01GHz ~ 2.025GHz), B38 band (2.57GHz ~ 2.62GHz), B39 band (1.88GHz ~ 1.92GHz), B40 band (2.3GHz ~ 2.4GHz) ), B41 band (2.49GHz ~ 2.69GHz), 5G N1 band (uplink 1.92GHz ~ 1.98GHz; downlink 2.11GHz ~ 2.17GHz), N2 band (uplink 1.85GHz ~ 1.91GHz; downlink 1.93GHz ~ 1.99GHz), N3 band (uplink 1.71GHz ~ 1.785GHz; downlink 1.805GHz ~ 1.88GHz), N7 Frequency bands (uplink 2.5GHz~2.57GHz; downlink 2.62GHz~2.69GHz), N34 band (2.01GHz~2.025GHz), N38 band (2.57GHz~2.62GHz), N39 band (1.88GHz~1.92GHz), N40 band (2.3GHz~2.4GHz), N41 band (2.49GHz~2.69GHz), and WIFI 2.4G band, etc. Optionally, the third frequency band may include at least one of the B1 band, B2 band, B3 band, B4 band, B7 band, B34 band, B38 band, B39 band, B40 band, B41 band, N1 band, N2 band, N3 band, N7 ​​band, N34 band, N38 band, N39 band, N40 band, N41 band, and WIFI 2.4G band. Optionally, the fourth frequency band may include at least one of the B1 band, B2 band, B3 band, B4 band, B7 band, B34 band, B38 band, B39 band, B40 band, B41 band, N1 band, N2 band, N3 band, N7 ​​band, N34 band, N38 band, N39 band, N40 band, N41 band, and WIFI 2.4G band.

[0051] The third frequency band being higher than the fourth frequency band can be understood as the center frequency of the third frequency band being higher than the center frequency of the fourth frequency band; or, the maximum frequency of the third frequency band being higher than the maximum frequency of the fourth frequency band; or, the minimum frequency of the third frequency band being higher than the maximum frequency of the fourth frequency band. In the following embodiments, the center frequency of the third frequency band being higher than the center frequency of the fourth frequency band is taken as an example. In a possible embodiment, the center frequency of the third frequency band may be 2.65 GHz, and the center frequency of the fourth frequency band may be 2.55 GHz. In this embodiment, the third frequency band may include the B41 frequency band, and the fourth frequency band may include the B7 frequency band.

[0052] In this embodiment, by making the first frequency band and the second frequency band both located at low frequency, the coverage range of the antenna component 100 for low frequency can be broadened, and the second frequency band is made higher than the first frequency band, which is beneficial for the antenna component 100 to have good radiation efficiency in the first frequency band and the second frequency band; by making the third frequency band and the fourth frequency band both located at medium and high frequency, the coverage range of the antenna component 100 for medium and high frequency can be broadened, and the third frequency band is made higher than the fourth frequency band, which is beneficial for the antenna component 100 to have good radiation efficiency in the third frequency band and the fourth frequency band.

[0053] Among them, the first resonance mode is a 1 / 4 wavelength mode, the second resonance mode is a 1 / 4 wavelength mode, the third resonance mode is a 3 / 4 wavelength mode, and the fourth resonance mode is a 1 / 2 wavelength mode.

[0054] It can be understood that the first resonant mode is a 1 / 4 wavelength mode of the first frequency band. The second resonant mode is a 1 / 4 wavelength mode of the second frequency band. The third resonant mode is a 3 / 4 wavelength mode of the third frequency band. The fourth resonant mode is a 1 / 2 wavelength mode of the fourth frequency band. In other words, the equivalent electrical length of the antenna radiator 102 between the feeding point C and the first free end A is equal to the 1 / 4 wavelength mode of the first frequency band. The equivalent electrical length of the first parasitic branch 20 between the third free end D and the first ground end E is equal to 1 / 4 wavelength of the second frequency band. The equivalent electrical length of the first parasitic branch 20 between the third free end D and the first ground end E is also equal to 3 / 4 wavelength of the third frequency band. The sum of the equivalent electrical length of the second parasitic branch 30 between the fourth free end F and the second ground end G and the equivalent electrical length of the antenna radiator 102 between the feeding point C and the second free end B is equal to 1 / 2 wavelength of the fourth frequency band.

[0055] The equivalent electrical length described in the embodiments of the present application Satisfies the relationship: Wherein, L is the physical length of the corresponding antenna radiator 102 or parasitic branch, a is the transmission time of the electric or electromagnetic signal in the medium, and b is the transmission time of the electric or electromagnetic signal in the free scene.

[0056] like Figure 3 As shown, Figure 3 for Figure 1 The current distribution diagram of the antenna assembly 100 in the first resonance mode is shown. The resonant current of the first resonance mode is in a strong-weak distribution between the feed point C and the first free end A. The resonant current of the first resonance mode forms a current strong point at the feed point C and a current weak point at the first free end A.

[0057] like Figure 4 As shown, Figure 4 for Figure 1 The schematic diagram of the current distribution of the antenna assembly 100 in the second resonance mode is shown. The resonant current of the second resonance mode is in a strong-weak distribution between the first ground terminal E and the third free terminal D. The resonant current of the second resonance mode forms a current strong point at the first ground terminal E and a current weak point at the third free terminal D.

[0058] like Figure 5 As shown, Figure 5 for Figure 1 Schematic diagram of current distribution of the antenna assembly 100 in the third resonance mode. The resonant current of the third resonance mode is distributed in a strong-weak-strong-weak manner between the first ground terminal E and the third free terminal D. The resonant current of the third resonance mode forms a current strong point at the first ground terminal E, a current weak point at the third free terminal D, and a current strong point and a current weak point between the third free terminal D and the first ground terminal E.

[0059] like Figure 6 As shown, Figure 6 for Figure 1 The schematic diagram of current distribution of the antenna assembly 100 in the fourth resonance mode is shown. The resonant current of the fourth resonance mode is distributed in a strong-weak-strong manner between the second ground terminal G and the feed point C. The resonant current of the fourth resonance mode forms a current strong point at the second ground terminal G, another current strong point at the feed point C, and a current weak point between the second ground terminal G and the feed point C.

[0060] This embodiment makes the first resonant mode a 1 / 4 wavelength mode and the second resonant mode a 1 / 4 wavelength mode, which helps to reduce the size of the antenna assembly 100 while ensuring that the antenna assembly 100 can cover a wider low frequency and has good radiation efficiency. By making the third resonant mode a 3 / 4 wavelength mode and the fourth resonant mode a 1 / 2 wavelength mode, it can be ensured that the antenna assembly 100 can cover a wider medium and high frequency and has good radiation efficiency.

[0061] In a possible embodiment, Figure 7 As shown, Figure 7 for Figure 1The tuning circuit 103 of the antenna assembly 100 shown in the figure includes a structural schematic diagram of a first sub-tuning circuit 131 and a second sub-tuning circuit 132. The tuning circuit 103 includes a first sub-tuning circuit 131 and a second sub-tuning circuit 132, one of the first sub-tuning circuit 131 and the second sub-tuning circuit 132 is capacitive and the other is inductive. In the embodiment of the present application, the first sub-tuning circuit 131 is inductive and the second sub-tuning circuit 132 is capacitive. It can be understood that the first sub-tuning circuit 131 includes at least one inductive element. The second sub-tuning circuit 132 includes at least one capacitive element. In an embodiment where the first frequency band is at a low frequency and the fourth frequency band is at a medium-high frequency, the resonant current of the first resonant mode is transmitted between the feed point C and the feed source 101 through the first sub-tuning circuit 131, and the resonant current of the fourth resonant mode is transmitted between the feed point C and the feed source 101 through the second sub-tuning circuit 132.

[0062] By making the tuning circuit 103 include a first sub-tuning circuit 131 and a second sub-tuning circuit 132, it is beneficial to achieve that the antenna radiator 102 between the feeding point C and the first free end A can generate a 1 / 4 wavelength mode supporting the first frequency band under the excitation of the feed source 101, and the antenna radiator 102 between the second parasitic branch 30, the feeding point C and the second free end B can generate a 1 / 2 wavelength mode supporting the fourth frequency band under the excitation of the feed source 101.

[0063] In a possible embodiment, Figure 8 As shown, Figure 8 for Figure 1 Another schematic diagram of the distribution of the resonant current when the antenna assembly 100 generates a resonant mode is shown. The antenna radiator 102 between the first free end A and the second free end B is used to generate a fifth resonant mode supporting a fifth frequency band under the excitation of the feed source 101 .

[0064] It can be understood that the resonant current of the fifth resonant mode is mainly distributed on the antenna radiator 102 between the first free end A and the second free end B. In this embodiment, the distribution of the resonant current of the fifth resonant mode can be referred to in the attached Figure 8 As shown in I5. Among them, the fifth resonance mode, the fourth resonance mode, the third resonance mode, the second resonance mode, and the first resonance mode exist at the same time, that is, the antenna assembly 100 can support the fifth frequency band, the fourth frequency band, the third frequency band, the second frequency band, and the first frequency band at the same time. The fifth frequency band, the fourth frequency band, the third frequency band, the second frequency band, and the first frequency band are different.

[0065] In this embodiment, the antenna radiator 102 between the first free end A and the second free end B is used to generate a fifth resonance mode supporting the fifth frequency band under the excitation of the feed source 101, thereby increasing the frequency band supported by the antenna assembly 100 and further broadening the bandwidth of the antenna assembly 100.

[0066] In a possible embodiment, the fifth frequency band is located in the middle and high frequency range, and the fifth frequency band is lower than the fourth frequency band.

[0067] Optionally, the fifth frequency band may include at least one of the B1 band, B2 band, B3 band, B4 band, B7 band, B34 band, B38 band, B39 band, B40 band, B41 band, N1 band, N2 band, N3 band, N7 ​​band, N34 band, N38 band, N39 band, N40 band, N41 band, and WIFI 2.4G band.

[0068] The fifth frequency band being lower than the fourth frequency band can be understood as the center frequency of the fifth frequency band being lower than the center frequency of the fourth frequency band; or, the minimum frequency of the fifth frequency band being lower than the minimum frequency of the fourth frequency band; or, the maximum frequency of the fifth frequency band being lower than the minimum frequency of the fourth frequency band. In the following embodiments, the center frequency of the fifth frequency band being lower than the center frequency of the fourth frequency band is taken as an example. In a possible embodiment, the center frequency of the fifth frequency band may be 1.71 GHz, and the center frequency of the fourth frequency band may be 2.55 GHz. In this embodiment, the fifth frequency band may include the B3 frequency band, and the fourth frequency band may include the B7 frequency band.

[0069] By making the fifth frequency band located in the middle and high frequency, the coverage range of the antenna assembly 100 for the middle and high frequency can be broadened, and making the fifth frequency band lower than the fourth frequency band is beneficial for the antenna assembly 100 to have good radiation efficiency in the fifth and fourth frequency bands.

[0070] The fifth resonance mode is a 1 / 2 wavelength mode. It can be understood that the fifth resonance mode is a 1 / 2 wavelength mode of the fifth frequency band. In other words, the equivalent electrical length of the antenna radiator 102 between the first free end A and the second free end B is equal to the 1 / 2 wavelength mode of the fifth frequency band. Fig. 9 As shown, Fig. 9 for Figure 1 The schematic diagram of the current distribution of the antenna assembly 100 in the fifth resonance mode is shown. The resonant current of the fifth resonance mode is weak-strong-weak distribution between the first free end A and the second free end B. The resonant current of the fifth resonance mode forms a current weak point at the first free end A, another current weak point at the second free end B, and a current strong point between the first free end A and the second free end B.

[0071] By making the fifth resonance mode a 1 / 2 wavelength mode, it is ensured that the antenna assembly 100 has good radiation efficiency in the fifth frequency band.

[0072] In a possible embodiment, Fig.10 As shown, Fig.10 for Figure 1 The antenna assembly 100 also includes a structural diagram of a matching circuit 60. The antenna assembly 100 also includes a matching circuit 60, one end of which is electrically connected to the third free end D and the other end is grounded. The matching circuit 60 is used to adjust the impedance of the first parasitic branch 20.

[0073] Optionally, the matching circuit 60 is capacitive, or the matching circuit 60 is inductive. In an embodiment where the matching circuit 60 is capacitive, the antenna assembly 100 further includes at least one capacitive element electrically connected between the third free end D and the reference ground. In an embodiment where the matching circuit 60 is inductive, the antenna assembly 100 further includes at least one inductive element electrically connected between the third free end D and the reference ground.

[0074] By making the antenna component 100 also include a matching circuit 60, one end of the matching circuit 60 is electrically connected to the third free end D, and the other end is grounded, which is helpful to adjust the impedance of the first parasitic branch 20, thereby changing the second frequency band and the third frequency band of the antenna component 100, that is, the design of the matching circuit 60 can make the second frequency band and the third frequency band shift to a lower frequency band, or make the second frequency band and the third frequency band shift to a higher frequency band.

[0075] Please refer to Fig.11 and Fig.12 , Fig.11 The return loss curve (S11) of the antenna assembly 100 provided in the embodiment of the present application is shown in FIG. Fig.12 This is an efficiency curve diagram of the antenna assembly 100 provided in an embodiment of the present application. Fig.12 The middle curve a1 is the radiation efficiency of the antenna assembly 100 under the excitation of the feed source 101, and the curve a2 is the system efficiency of the antenna assembly 100 under the excitation of the feed source 101. Fig.11 It can be seen from the curve that the antenna assembly 100 can support multiple low-frequency bands and multiple medium-high frequency bands. Specifically, the antenna assembly 100 can support Fig.11 The frequency points shown include the low frequency bands of point 1, point 11, point 12, point 2, point 10, and point 3, that is, it can support 0.7GHz to 0.96GHz, basically covering all the commonly used low frequency bands; and the antenna assembly 100 can support Fig.11 The frequency points shown include the mid-high frequency bands of point 4, point 9, point 5, point 8, point 6, point 13, and point 7, which can support 1.71GHz to 2.73GHz, basically covering all commonly used mid-high frequency bands. Fig.12 It can be seen from the curve a1 that the antenna assembly 100 has a better radiation efficiency at low frequency, which is basically above -9dB. Fig.12 It can be seen from the curve a1 that the antenna assembly 100 has a good radiation efficiency at medium and high frequencies, which is basically above -8dB. Fig.12 It can be seen from the curve a2 that the antenna assembly 100 has better system efficiency at low frequencies and medium and high frequencies.

[0076] In addition, please refer to Fig.13 and Fig.14 , Fig.13 A schematic diagram of the structure of an electronic device 1000 provided in an embodiment of the present application is shown in FIG. Fig.14 Another structural schematic diagram of an electronic device 1000 provided in an embodiment of the present application. The present application also provides an electronic device 1000. The electronic device 1000 may be a mobile phone, a tablet computer, a laptop computer, a wearable device (such as a watch, a bracelet, etc.), etc. In the embodiment of the present application, a mobile phone is taken as an example. The electronic device 1000 includes a middle frame assembly, a circuit board assembly, and an antenna assembly 100 described in any of the above embodiments. The middle frame assembly includes a frame 70, and the antenna radiator 102, the first parasitic branch 20, and the second parasitic branch 30 are all arranged on the frame 70. The circuit board assembly includes at least one circuit board 80, and the feed source 101, the tuning circuit 103, and the matching circuit 60 are all arranged on the circuit board 80.

[0077] In a possible embodiment, Fig.13 As shown, the frame 70 may be a conductive frame, that is, the material of the frame 70 is a conductive material such as metal, alloy, etc. In this embodiment, the antenna radiator 102 is arranged on the frame 70, and the antenna radiator 102 may be integrated on the frame 70, that is, a part of the frame 70 forms the antenna radiator 102, the first parasitic branch 20 is arranged on the frame 70, and the first parasitic branch 20 is integrated on the frame 70, that is, another part of the frame 70 forms the first parasitic branch 20, and the second parasitic branch 30 is arranged on the frame 70, and the second parasitic branch 30 is integrated on the frame 70, that is, another part of the frame 70 forms the second parasitic branch 30.

[0078] In another possible embodiment, Fig.14 As shown, the frame 70 may be a non-conductive frame, that is, the material of the frame 70 may be plastic, glass or other non-conductive materials. In this embodiment, the antenna radiator 102 is arranged on the frame 70, which may be the antenna radiator 102 fixed to the inner side of the frame 70, the first parasitic branch 20 is arranged on the frame 70, which may be the first parasitic branch 20 fixed to the inner side of the frame 70, and the second parasitic branch 30 is arranged on the frame 70, which may be the second parasitic branch 30 fixed to the inner side of the frame 70.

[0079] The present application does not specifically limit the number of circuit boards 80. For example, the circuit board assembly may include a main circuit board and at least one auxiliary circuit board. The feed source 101, the tuning circuit 103, and the matching circuit 60 may be arranged on the same circuit board 80. Optionally, the RF chip, the feed source 101, the tuning circuit 103, and the matching circuit 60 are all arranged on the main circuit board; or, the RF chip is arranged on the main circuit board, and the feed source 101, the tuning circuit 103, and the matching circuit 60 are all arranged on the auxiliary circuit board.

[0080] The electronic device 1000 provided in the present application includes the antenna assembly 100 described in any of the above embodiments, and thus has a wider communication bandwidth and can achieve a de-switching design to reduce costs.

[0081] In a possible embodiment, the frame 70 includes a first sub-frame 701, a second sub-frame 702, a third sub-frame 703, and a fourth sub-frame 704 connected end to end in sequence. The antenna radiator 102 includes a first sub-antenna radiator and a second sub-antenna radiator connected in a bent manner, the first sub-antenna radiator is arranged on the first sub-frame 701, and the second sub-antenna radiator is arranged on the fourth sub-frame 704. The first parasitic branch 20 includes a first sub-parasitic branch and a second sub-parasitic branch connected in a bent manner, the first sub-parasitic branch is arranged on the first sub-frame 701, and the second sub-parasitic branch is arranged on the second sub-frame 702. The second parasitic branch 30 is arranged on the fourth sub-frame 704.

[0082] The present application does not make any specific limitation on the bending shape between the first sub-antenna radiator and the second sub-antenna radiator. Exemplarily, the first sub-antenna radiator and the second sub-antenna radiator can be bent at a right angle, or the first sub-antenna radiator and the second sub-antenna radiator can be bent in an arc shape. The present application does not make any specific limitation on the bending shape between the first sub-parasitic branch and the second sub-parasitic branch. Exemplarily, the first sub-parasitic branch and the second sub-parasitic branch can be bent at a right angle, or the first sub-parasitic branch and the second sub-parasitic branch can be bent in an arc shape.

[0083] It can be understood that in this embodiment, part of the antenna radiator 102 is arranged on the first sub-frame 701, and another part of the antenna radiator 102 is arranged on the fourth sub-frame 704, part of the first parasitic branch 20 is arranged on the first sub-frame 701, and another part of the first parasitic branch 20 is arranged on the second sub-frame 702, and all the second parasitic branches 30 are arranged on the fourth sub-frame 704. In a possible embodiment, taking the back side perspective of the electronic device 1000 as an example, the first sub-frame 701 can be understood as the bottom frame 70 of the electronic device 1000, the second sub-frame 702 can be understood as the left side frame 70 of the electronic device 1000, the third sub-frame 703 can be understood as the top frame 70 of the electronic device 1000, and the fourth sub-frame 704 can be understood as the right side frame 70 of the electronic device 1000.

[0084] By locating at least part of the antenna radiator 102 in the first sub-frame 701, at least part of the first parasitic branch 20 in the second sub-frame 702, and the second parasitic branch 30 in the fourth sub-frame 704, it is possible to support the above-mentioned low frequency, medium and high frequency in a conventional mobile phone size, and it is beneficial to arrange antennas such as GPS in the third sub-frame 703, the end of the second sub-frame 702 close to the third sub-frame 703, and the end of the fourth sub-frame 704 close to the third sub-frame 703, so as to ensure the positioning performance of the electronic device 1000.

[0085] The features mentioned in the description, claims and drawings can be combined with each other as desired as long as they are meaningful within the scope of the present application. The advantages and features described for the antenna assembly 100 apply to the electronic device 1000 in a corresponding manner.

[0086] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also regarded as the scope of protection of the present application.

Claims

1. An antenna assembly, characterized in that: include: An antenna unit, comprising a feed source, an antenna radiator and a tuning circuit, wherein the antenna radiator has a first free end, a second free end and a feeding point located between the first free end and the second free end, the tuning circuit is electrically connected between the feeding point and the feed source, and the antenna radiator between the feeding point and the first free end is used to generate a first resonant mode supporting a first frequency band under the excitation of the feed source; a first parasitic branch node, located at one side of the antenna radiator, the first parasitic branch node comprising a third free end and a first grounding end, a first coupling gap being formed between the third free end and the first free end, the first grounding end being grounded, the first parasitic branch node being used to generate a second resonance mode supporting a second frequency band under the excitation of the feed source, and being used to generate a third resonance mode supporting a third frequency band under the excitation of the feed source; and A second parasitic branch is located on the other side of the antenna radiator, the second parasitic branch includes a fourth free end and a second ground end, a second coupling gap is formed between the fourth free end and the second free end, the second ground end is grounded, and the antenna radiator between the second parasitic branch, the feeding point and the second free end is used to generate a fourth resonant mode supporting a fourth frequency band under the excitation of the feed source.

2. The antenna assembly according to claim 1, characterized in that: The first frequency band and the second frequency band are both located at low frequencies, and the second frequency band is higher than the first frequency band; the third frequency band and the fourth frequency band are both located at medium and high frequencies, and the third frequency band is higher than the fourth frequency band.

3. The antenna assembly according to claim 1, characterized in that: The first resonance mode is a 1 / 4 wavelength mode, the second resonance mode is a 1 / 4 wavelength mode, the third resonance mode is a 3 / 4 wavelength mode, and the fourth resonance mode is a 1 / 2 wavelength mode.

4. The antenna assembly according to claim 1, characterized in that: The tuning circuit includes a first sub-tuning circuit and a second sub-tuning circuit, wherein one of the first sub-tuning circuit and the second sub-tuning circuit is capacitive and the other is inductive.

5. The antenna assembly according to any one of claims 1 to 4, characterized in that: The antenna radiator between the first free end and the second free end is used to generate a fifth resonance mode supporting a fifth frequency band under the excitation of the feed source.

6. The antenna assembly according to claim 5, characterized in that: The fifth frequency band is located in the middle and high frequency range, and the fifth frequency band is lower than the fourth frequency band.

7. The antenna assembly according to claim 5, characterized in that: The fifth resonance mode is a 1 / 2 wavelength mode.

8. The antenna assembly according to any one of claims 1 to 4, characterized in that: The antenna assembly further includes a matching circuit, one end of which is electrically connected to the third free end, and the other end of which is grounded, and the matching circuit is used to adjust the impedance of the first parasitic branch.

9. An electronic device, characterized in that: It comprises a middle frame component, a circuit board component and an antenna component according to any one of claims 1 to 8, wherein the middle frame component comprises a frame, the antenna radiator, the first parasitic branch and the second parasitic branch are all arranged on the frame, the circuit board component comprises at least one circuit board, and the feed source and the tuning circuit are both arranged on the circuit board.

10. The electronic device according to claim 9, characterized in that: The frame includes a first sub-frame, a second sub-frame, a third sub-frame and a fourth sub-frame connected in sequence end to end; the antenna radiator includes a first sub-antenna radiator and a second sub-antenna radiator connected in a bent manner, the first sub-antenna radiator is arranged in the first sub-frame, and the second sub-antenna radiator is arranged in the fourth sub-frame; the first parasitic branch includes a first sub-parasitic branch and a second sub-parasitic branch connected in a bent manner, the first sub-parasitic branch is arranged in the first sub-frame, the second sub-parasitic branch is arranged in the second sub-frame, and the second parasitic branch is arranged in the fourth sub-frame.

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