Antenna assembly and electronic equipment

Abstract

The utility model provides an antenna assembly and electronic equipment, and belongs to the technical field of antennas. The antenna assembly comprises a first radiator, a second radiator and a first circuit structure. The first radiator comprises a first end and a second end, and the second radiator comprises a third end and a fourth end; the first end and the third end are arranged in an end-to-end manner, a first breaking joint is arranged between the first end and the third end, and the fourth end is grounded; the first circuit structure includes a first switching element and at least one first capacitive element connected in series between the first end and the third end. According to the antenna assembly of the utility model, both a high frequency band and a low frequency band can be realized, good radiation performance can be obtained regardless of the coverage density of a communication base station, and the communication performance of electronic equipment can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to antenna technical field, especially relate to a kind of antenna assembly and electronic equipment. BACKGROUND

[0002] At present, mobile phone, tablet computer and other electronic equipment have become indispensable tool in people's daily life. These electronic equipment usually need to carry communication antenna, to realize wireless communication.

[0003] The electronic equipment in the related art can obtain good communication performance in the environment with high communication base station coverage density, but cannot guarantee sufficient communication performance in the environment with low communication base station coverage density such as subway and parking lot, which affects the normal use of the electronic equipment. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of antenna assembly and electronic equipment, can solve the problem that the environment with low communication base station coverage density cannot guarantee sufficient communication performance, affect the normal use of electronic equipment.

[0005] The technical solution is as follows:

[0006] On the one hand, an antenna assembly is provided, which includes a first radiator, a second radiator and a first circuit structure.

[0007] The first radiator includes a first end and a second end, and the second radiator includes a third end and a fourth end. The first end and the third end are arranged head to head, and a first gap is provided between the first end and the third end. The fourth end is grounded.

[0008] The first circuit structure includes a first switch element and at least one first capacitor element. The first switch element and the at least one first capacitor element are connected in series between the first end and the third end.

[0009] In some embodiments, when the antenna assembly operates in a first frequency band, the first switch element is open, and the first end and the second end are not connected.

[0010] When the antenna assembly operates in a second frequency band, the first switch element is closed, and the first end and the second end are electrically connected through the at least one first capacitor element.

[0011] The center frequency of the first frequency band is greater than the center frequency of the second frequency band.

[0012] In some embodiments, the length of the first radiator is L1, and the length of the second radiator is L2, where L1+L2≥20mm.

[0013] In some embodiments, the first capacitor element is at least two in number; the first switch element comprises a first connection terminal and at least two second connection terminals;

[0014] Each of the first capacitor elements is connected in series with one of the second connection terminals, and the first connection terminal is conductive with at least one of the second connection terminals, so that at least two of the first capacitor elements are electrically connected between the first end and the second end.

[0015] In some embodiments, the first connection terminal is electrically connected with the third end; the second connection terminal is at least four in number;

[0016] The first circuit structure further comprises a second capacitor element and a first inductor element;

[0017] At least four of the second connection terminals are respectively electrically connected with one end of the first capacitor element, one end of the second capacitor element, and one end of the first inductor element, and the other end of the second capacitor element and the other end of the first inductor element are grounded.

[0018] In some embodiments, the antenna assembly further comprises a second circuit structure and a first feed source;

[0019] The first radiator is provided with a first feed point, which is located between the first end and the second end and is close to the second end; the first feed point is electrically connected with the first feed source through the second circuit structure.

[0020] In some embodiments, the second circuit structure comprises a third capacitor element and a second inductor element;

[0021] One end of the third capacitor element is electrically connected with the first feed point, and the other end of the third capacitor element is electrically connected with the first feed source and one end of the second inductor element respectively, and the other end of the second inductor element is grounded.

[0022] In some embodiments, the antenna assembly further comprises a third radiator, a third circuit structure, and a second feed source;

[0023] The third radiator comprises a fifth end and a sixth end;

[0024] The fifth end and the second end head are arranged in head-to-head, and a second break is provided between the fifth end and the second end, and the sixth end is grounded;

[0025] The third radiator is provided with a second feed point, which is electrically connected with the second feed source through the third circuit structure.

[0026] In some embodiments, the first radiator has a length of L1, the second radiator has a length of L2, and the third radiator has a length of L3, wherein L3>L1>L2, and the third radiator is used to cover the LB frequency band.

[0027] In another aspect, an electronic device is provided, and the electronic device includes the antenna assembly.

[0028] The technical scheme provided by the utility model has at least the following beneficial effects:

[0029] The antenna assembly has the following advantages: the first radiator and the second radiator are arranged head to head, the antenna assembly can separately use the first radiator and the second radiator to receive and transmit electromagnetic signals, and meet the radiation requirement of a high frequency band; the radiators can be set according to the wavelength of a target frequency band, and the radiation efficiency when working in the target frequency band can be improved; the two radiators are electrically connected through the first circuit structure, the first radiator and the second radiator can be coupled together through the first circuit structure, and a larger radiation length can be obtained, the radiation requirement of a low frequency band can be met, and the radiation performance of the antenna assembly for the low frequency band can be improved; therefore, the antenna assembly can meet the requirements of both the high frequency band and the low frequency band, and good radiation performance can be obtained regardless of the coverage density of a communication base station, and the communication performance of the electronic device can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0031] Figure 1 It is a structural schematic diagram of the antenna assembly provided by the utility model embodiment;

[0032] Figure 2 It is a structural schematic diagram of the antenna assembly provided by another utility model embodiment;

[0033] Figure 3 It is a structural schematic diagram of the antenna assembly provided by another utility model embodiment;

[0034] Figure 4 It is a structural schematic diagram of the electronic device provided by the utility model embodiment.

[0035] The reference signs in the drawings respectively represent:

[0036] 1, first radiator;

[0037] 101 first end; 102 second end;

[0038] 11 first feed point;

[0039] 2 second radiator;

[0040] 201 third end; 202 fourth end;

[0041] 3 first circuit structure;

[0042] 31 first switching element; 311 first connection terminal; 312 second connection terminal; 32 first capacitive element; 33 second capacitive element; 34 first inductive element;

[0043] 4 second circuit structure;

[0044] 41 third capacitive element; 42 second inductive element;

[0045] 5 first feed source;

[0046] 6 first split;

[0047] 7 third radiator;

[0048] 701 fifth end; 702 sixth end;

[0049] 71 second feed point;

[0050] 8 third circuit structure;

[0051] 81 second switching element; 82 fourth capacitive element; 83 fifth capacitive element; 84 third inductive element;

[0052] 9 second feed source;

[0053] 10 second split;

[0054] 001 frame portion; 002 middle plate portion; 003 floating groove. DETAILED DESCRIPTION

[0055] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, like reference numerals refer to like elements, unless the context clearly dictates otherwise. The following exemplary embodiments described herein make no intent to represent all embodiments consistent with the present invention. Rather, they are merely examples consistent with some aspects of the invention as detailed in the appended claims.

[0056] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present embodiments belong.

[0057] With the increasing demand of electronic devices for high screen ratio, long endurance and functional diversification, and the development demand of electronic devices for lightness, thinness and portability, the design difficulty of communication antennas applied to electronic device scenarios is increasing.

[0058] The antenna assembly in the related art generally needs to be designed to fuse the MHB (Middle High Band) frequency band and the LB (LOW Band) frequency band. Among them, the MHB frequency band is realized by a quarter wavelength mode of an inverted F antenna (also known as an IFA, Inverted FAntenna). However, due to the quarter wavelength mode of the IFA antenna, the length of the antenna is generally between 14mm-20mm, which is relatively short, and cannot be used to achieve a balance between B3 and B41 and N78. The reason is that the frequency of the B3 frequency band is relatively low, and the wavelength is relatively long. If the length of the antenna is increased, the half wavelength mode or the three-quarter wavelength mode is used, and the reverse current appears, which further deteriorates the performance of the antenna.

[0059] Therefore, the utility model provides an antenna assembly, which can realize the balance between high and low frequency bands, and can obtain good radiation performance regardless of the coverage density of the communication base station, thereby improving the communication performance of the electronic device.

[0060] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model embodiment will be described in further detail below with reference to the drawings.

[0061] On the one hand, combined with Figure 1 As shown in the figure, the embodiment provides an antenna assembly, which comprises a first radiator 1, a second radiator 2 and a first circuit structure 3.

[0062] The first radiator 1 comprises a first end 101 and a second end 102, and the second radiator 2 comprises a third end 201 and a fourth end 202; the first end 101 and the third end 201 are arranged head to head, and a first gap 6 is arranged between the first end 101 and the third end 201, and the fourth end 202 is grounded.

[0063] The first circuit structure 3 comprises a first switching element 31 and at least one first capacitive element 32, and the first switching element 31 and the at least one first capacitive element 32 are connected in series between the first end 101 and the third end 201.

[0064] The antenna assembly of the embodiment, the first radiator 1 and the second radiator 2 are arranged head to head, the antenna assembly can separately receive and transmit electromagnetic signals by using the first radiator 1 and the second radiator 2 respectively, meet the radiation requirement of a higher frequency band, and the radiators can be set according to the wavelength of the target frequency band, and the radiation efficiency when working in the target frequency band can be improved; the two radiators are electrically connected through the first circuit structure 3, the first radiator 1 and the second radiator 2 can be coupled together by using the first circuit structure 3, so that a larger radiation length can be obtained, the radiation requirement of a lower frequency band can be met, and the radiation performance of the antenna assembly for the lower frequency band is improved; so that the antenna assembly can realize the consideration of the higher frequency band and the lower frequency band, and no matter the communication base station coverage density is high or low, good radiation performance can be obtained, and the communication performance of the electronic equipment is improved.

[0065] In some embodiments, when the antenna assembly works in the first frequency band, the first switch element 31 is open, and the first end 101 and the second end 102 are not connected; when the antenna assembly works in the second frequency band, the first switch element 31 is closed, and the first end 101 and the second end 102 are electrically connected through at least one first capacitor element 32; wherein the center frequency of the first frequency band is greater than the center frequency of the second frequency band.

[0066] Through the above arrangement, the antenna assembly of the embodiment can work in the first frequency band with smaller wavelength when the first switch element 31 is open, and work in the second frequency band with larger wavelength when the first switch element 31 is closed, realizing the consideration of the higher frequency band and the lower frequency band.

[0067] In some possible implementations, when the first switch element 31 is open, the first radiator 1 and the second radiator 2 form a parasitic antenna; when the first switch element 31 is closed, the first radiator 1 and the second radiator 2 form a metamaterial antenna.

[0068] In some possible implementations, when the first radiator 1 and the second radiator 2 form a parasitic antenna, the first radiator 1 serves as an active antenna unit, and the second radiator 2 serves as a parasitic antenna unit, the active antenna unit is responsible for receiving or transmitting signals and generating an excitation electromagnetic field; the parasitic antenna unit is in the electromagnetic field based on electromagnetic induction and coupling effect when the active antenna unit is excited by the feed to generate an electromagnetic field, and an electric current is generated on the parasitic antenna unit through inductive coupling, and then electromagnetic waves are radiated. By using the radiation effect of the parasitic antenna unit, the radiation performance of the active antenna unit can be improved, and it is suitable for some space-limited devices or application scenarios, such as smart phones and the like.

[0069] For example, the second radiator 2 is electrically connected to the first radiator 1 using the first circuit structure 3, so that it serves as a parasitic antenna unit of the first radiator 1. The structure is simple, the structure of the second radiator 2 is simple, and the cost is also low, which is beneficial to improving the production and application of antenna components.

[0070] In some other possible implementations, when the first radiator 1 and the second radiator 2 form a metamaterial antenna, the first radiator 1 forms a conventional antenna element, and the first circuit structure 3 and the second radiator 2 form a metamaterial antenna element. The metamaterial antenna element can positively influence the performance of the conventional antenna element, such as effectively focusing and controlling the propagation direction of electromagnetic waves, thereby improving the gain of the antenna assembly, enhancing the signal transmission distance and coverage. Furthermore, by rationally designing the structural parameters of the metamaterial antenna element, a wider operating bandwidth can be achieved, improving the adaptability and compatibility of the antenna assembly to different frequency signals, reducing the need for multiple antennas due to frequency band switching, and lowering the complexity and cost of the system.

[0071] Combination Figure 1 As shown, in some embodiments, the length of the first radiator 1 is L1, and the length of the second radiator 2 is L2, wherein L1+L2≥20mm.

[0072] When the sum of the length L1 of the first radiator 1 and the length L2 of the second radiator 2 meets the above range, the first radiator 1 and the second radiator 2, after being connected in series by the first switching element 31, have sufficient radiation length and better radiation performance when working in the low frequency band.

[0073] Combination Figure 2 As shown, in some embodiments, the number of first capacitor elements 32 is at least two; the first switching element 31 includes a first connection terminal 311 and at least two second connection terminals 312.

[0074] Each first capacitor element 32 is connected in series with a second connection terminal 312. The first connection terminal 311 is able to conduct with at least one second connection terminal 312, so that at least two first capacitor elements 32 are electrically connected between the first end 101 and the second end 102, respectively.

[0075] With the above arrangement, the number of first capacitor elements 32 is at least two, and different first capacitor elements 32 can be connected between the first end 101 and the second end 102, that is, between the first radiator 1 and the second radiator 2, by using the first connection terminal 311 and the second connection terminal 312. This allows the metamaterial antenna formed by the first radiator 1 and the second radiator 2 in series to have more working states and can meet the radiation requirements of different frequency bands.

[0076] In some possible implementation manners, the number of the first capacitive elements 32 is, for example, two, three, or the like, and the number of the second connection terminals 312 is, for example, two, three, or the like.

[0077] Exemplarily, the capacitance of the first capacitive elements 32 is different.

[0078] Exemplarily, the first switching element 31 is an SPnT switching element, and can also be an nSPST switching element.

[0079] In combination Figure 2 As shown in the drawings, in some embodiments, the first connection terminal 311 is electrically connected with the third end 201, the second connection terminal 312 is at least four, and the first circuit structure 3 further includes a second capacitive element 33 and a first inductive element 34.

[0080] The at least four second connection terminals 312 are respectively electrically connected with one end of the first capacitive element 32, one end of the second capacitive element 33, and one end of the first inductive element 34, and the other end of the second capacitive element 33 and the other end of the first inductive element 34 are grounded.

[0081] Through the above arrangement, the first switching element 31 can not only control the first radiator 1 and the second radiator 2 to be electrically connected by using the first capacitive element 32, but also control the first radiator 1 or the second radiator 2 to be grounded through the second capacitive element 33 and / or the first inductive element 34, so that the antenna assembly can have more current modes in the parasitic antenna and / or metamaterial antenna scheme, increase the resonance mode of the antenna assembly, and further expand the working bandwidth of the antenna assembly and improve the working performance of the antenna assembly.

[0082] In combination Figure 2 As shown in the drawings, in some embodiments, the antenna assembly further includes a second circuit structure 4 and a first feed source 5, the first radiator 1 is provided with a first feeding point 11, the first feeding point 11 is located between the first end 101 and the second end 102 and close to the second end 102, and the first feeding point 11 is electrically connected with the first feed source 5 through the second circuit structure 4.

[0083] Through the above arrangement, the first radiator 1 is electrically connected with the first feed source 5 through the second circuit structure 4, and the feeding connection of the antenna assembly can be realized.

[0084] In combination Figure 1 As shown in the drawings, in some embodiments, the second circuit structure 4 includes a third capacitive element 41 and a second inductive element 42, one end of the third capacitive element 41 is electrically connected with the first feeding point 11, the other end of the third capacitive element 41 is electrically connected with the first feed source 5 and one end of the second inductive element 42 respectively, and the other end of the second inductive element 42 is grounded.

[0085] Through the above arrangement, the second circuit structure 4 can realize impedance matching between the antenna assembly and the transmitter or receiver by using the third capacitive element 41 and the second inductive element 42, so as to reduce signal reflection, improve transmission efficiency, and ensure maximum power transmission of the signal.

[0086] In combination Figure 3 As shown in the figure, in some embodiments, the antenna assembly further comprises a third radiator 7, a third circuit structure 8, and a second feed source 9; the third radiator 7 comprises a fifth end 701 and a sixth end 702; the fifth end 701 and the second end 102 are arranged head to head, and the second gap 10 is arranged between the fifth end 701 and the second end 102, and the sixth end 702 is grounded; the third radiator 7 is provided with a second feeding point 71, and the second feeding point 71 is electrically connected with the second feed source 9 through the third circuit structure 8.

[0087] Through the above arrangement, the antenna assembly can realize more tuning modes by using the third radiator 7, and meet more frequency band requirements.

[0088] In some possible implementation manners, with reference Figure 3 As shown in the figure, the third circuit structure 8 comprises a second switch element 81, a fourth capacitive element 82, two fifth capacitive elements 83, and two third inductive elements 84.

[0089] The second switch element 81 is a 4SPST switch, which comprises four single open single control branches, and controls the grounding of the second feeding point 71 through the two fifth capacitive elements 83 and the two third inductive elements 84; in addition, the fourth capacitive element 82 is connected in series between the second feeding point 71 and the second feed source 9.

[0090] Through the third circuit structure 8, the antenna assembly can realize impedance matching between the third radiator 7 and the transmitter or receiver, so as to reduce signal reflection, improve transmission efficiency, and ensure maximum power transmission of the signal between the second feed source 9 and the third radiator 7.

[0091] In combination Figure 3 As shown in the figure, in some embodiments, the length of the first radiator 1 is L1, the length of the second radiator 2 is L2, and the length of the third radiator 7 is L3, wherein L3>L1>L2, and the third radiator 7 is used to cover the LB frequency band.

[0092] Through the above arrangement, the length of the third radiator 7 is large, which is beneficial to improve the radiation performance of the low-frequency frequency band, and the lengths of the first radiator 1 and the second radiator 2 are moderate, which can take into account the volume of the electronic device, and also improve the radiation performance of the MHB, N78 and N79 frequency bands.

[0093] The gain test of the antenna assembly provided in the embodiment of the utility model in the B3, B1, B40, B41 and N78 frequency bands is as follows:

[0094]

[0095] It can be seen that the antenna assembly provided by the utility model has better radiation performance in multiple frequency bands such as B3 and B1 compared with the prior art, and the gain improvement is generally above 1.3dB.

[0096] On the other hand, in combination with Figure 4 The electronic device provided by the embodiment comprises the antenna assembly of the utility model.

[0097] The electronic device of the embodiment adopts the antenna assembly of the utility model, and has all the beneficial technical effects of the utility model.

[0098] In some possible implementation manners, referring to Figure 4 As shown in the figure, the electronic device further comprises a frame part 001 and a middle plate part 002, the second radiator 2, the first radiator 1 and the third radiator 7 are arranged on the same side frame of the frame part 001 in sequence, and the second radiator 2, the first radiator 1 and the third radiator 7 are separated from the middle plate part 002 by a suspension groove 003.

[0099] In some possible implementation manners, the electronic device can be any one of various types of computer system devices that are mobile or portable and perform wireless communication. Specifically, the electronic device can be a mobile phone or a smart phone (for example, an iPhone TM-based phone, an Android TM-based phone), a portable game device (for example, Nintendo DS TM, PlayStation Portable TM, Gameboy Advance TM, iPhone TM), a laptop, a PDA, a portable Internet device, a music player and a data storage device, other handheld devices and the like such as a headset, and the electronic device can also be other wearable devices that need to be charged (for example, a head-mounted device (HMD) such as an electronic bracelet, an electronic necklace, an electronic device or a smart watch).

[0100] It should be noted that, in the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0101] In the description of the present specification, the description referring to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the present application.

[0102] The above only describes the embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. An antenna assembly, characterized by The antenna assembly comprises a first radiator (1), a second radiator (2) and a first circuit structure (3); The first radiator (1) comprises a first end (101) and a second end (102), and the second radiator (2) comprises a third end (201) and a fourth end (202); the first end (101) and the third end (201) are arranged head to head, and a first gap (6) is arranged between the first end (101) and the third end (201); and the fourth end (202) is grounded. The first circuit structure (3) comprises a first switching element (31) and at least one first capacitive element (32); the first switching element (31) and the at least one first capacitive element (32) are connected in series between the first end (101) and the third end (201).

2. The antenna assembly of claim 1, wherein, When the antenna assembly operates in a first frequency band, the first switching element (31) is open, and the first end (101) and the second end (102) are not connected; When the antenna assembly operates in a second frequency band, the first switching element (31) is closed, and the first end (101) and the second end (102) are electrically connected through the at least one first capacitive element (32); The center frequency of the first frequency band is greater than the center frequency of the second frequency band.

3. The antenna assembly of claim 1, wherein, The length of the first radiator (1) is L1, and the length of the second radiator (2) is L2, wherein L1+L2≥20mm.

4. The antenna assembly of claim 1, wherein, The number of the first capacitive elements (32) is at least two; the first switching element (31) comprises a first connection terminal (311) and at least two second connection terminals (312); Each of the first capacitive elements (32) is connected in series with one of the second connection terminals (312); the first connection terminal (311) can be conductive with at least one of the second connection terminals (312), so that at least two of the first capacitive elements (32) are electrically connected between the first end (101) and the second end (102).

5. The antenna assembly of claim 4, wherein, The first connection terminal (311) is electrically connected with the third end (201); and the second connection terminal (312) is at least four. The first circuit structure (3) further comprises a second capacitive element (33) and a first inductive element (34); At least four of the second connection terminals (312) are respectively electrically connected with one end of the first capacitive element (32), one end of the second capacitive element (33) and one end of the first inductive element (34); the other end of the second capacitive element (33) and the other end of the first inductive element (34) are grounded.

6. The antenna assembly of any one of claims 1 to 5, wherein, The antenna assembly further comprises a second circuit structure (4) and a first feed source (5); The first radiator (1) is provided with a first feeding point (11) between the first end (101) and the second end (102) and close to the second end (102); and the first feeding point (11) is electrically connected with the first feed source (5) through the second circuit structure (4).

7. The antenna assembly of claim 6, wherein, The second circuit structure (4) comprises a third capacitive element (41) and a second inductive element (42); One end of the third capacitive element (41) is electrically connected with the first feeding point (11), the other end of the third capacitive element (41) is electrically connected with the first feeding source (5) and one end of the second inductive element (42) respectively, and the other end of the second inductive element (42) is grounded.

8. The antenna assembly of any one of claims 1 to 5, wherein, The antenna assembly further comprises a third radiator (7), a third circuit structure (8) and a second feeding source (9); The third radiator (7) comprises a fifth end (701) and a sixth end (702); The fifth end (701) and the second end (102) are arranged head to head, a second break joint (10) is arranged between the fifth end (701) and the second end (102), and the sixth end (702) is grounded; The third radiator (7) is provided with a second feeding point (71), and the second feeding point (71) is electrically connected with the second feeding source (9) through the third circuit structure (8).

9. The antenna assembly of claim 8, wherein, The length of the first radiator (1) is L1, the length of the second radiator (2) is L2, and the length of the third radiator (7) is L3, wherein L3>L1>L2, and the third radiator (7) is used for covering the LB frequency band.

10. An electronic device, comprising: The electronic device comprises the antenna assembly according to any one of claims 1 to 9.

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