Antenna assembly, middle frame assembly and electronic equipment

Abstract

The utility model relates to an antenna assembly, a middle frame assembly and electronic equipment. The antenna assembly comprises a first antenna and a second antenna, the plurality of grounding points are located between the first antenna and the second antenna, the plurality of grounding points comprise a first grounding point and a second grounding point, the first grounding point is grounded through a first capacitor, the second grounding point is grounded through a second capacitor, and compared with the first grounding point, the second grounding point is closer to the second antenna; and the capacitance value of the first capacitor is greater than that of the second capacitor. According to the invention, the design requirement of the first antenna radiation frequency band is met, and the resonance efficiency of the antenna is optimized, so that the radiation efficiency of the antenna is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic device antennas, and in particular to an antenna assembly, a middle frame assembly and an electronic device. Background Art

[0002] With the gradual development of electronic devices, people pay more and more attention to the radiation effects of electronic devices. Current mobile phone projects will introduce proximity detection mechanisms in the antenna part. By returning the antenna radiator to the ground through a large capacitor, the antenna radiator is suspended, and a proximity sensing chip is used to detect whether a human body is close to the mobile phone. In this way, the RF power of the antenna can be actively reduced when a human body is detected close to the mobile phone, thereby reducing the impact of electromagnetic wave radiation from electronic devices on the human body.

[0003] However, the grounding effect of the antenna radiator through the capacitor is not as good as the grounding effect through the metal. The capacitor grounding points may not be fully grounded, which will lead to a decrease in antenna efficiency and increase the difficulty of the antenna's early design and debugging process. Utility Model Content

[0004] In order to overcome the problems existing in the related art, the present disclosure provides an antenna assembly, a middle frame assembly and an electronic device. According to a first aspect of an embodiment of the present disclosure, an antenna assembly is provided, the antenna assembly comprising: a first antenna and a second antenna; a plurality of grounding points, located between the first antenna and the second antenna, the plurality of grounding points comprising a first grounding point and a second grounding point, the first grounding point being grounded through a first capacitor, the second grounding point being grounded through a second capacitor, and the second grounding point being closer to the second antenna than the first grounding point, wherein the capacitance value of the first capacitor is greater than the capacitance value of the second capacitor.

[0005] In some embodiments, a ratio of a capacitance value of the first capacitor to a capacitance value of the second capacitor is 17:1 to 5:1.

[0006] In some embodiments, the grounding point includes a third grounding point, the third grounding point is grounded via a third capacitor, and compared to the first grounding point, the third grounding point is closer to the first antenna.

[0007] In some embodiments, a capacitance value of the second capacitor is greater than a capacitance value of the third capacitor.

[0008] In some embodiments, a ratio of a capacitance value of the second capacitor to a capacitance value of the third capacitor is 1.5:1 to 2.5:1.

[0009] In some embodiments, the capacitance of the third capacitor is 1 picofarad to 3 picofarads.

[0010] In some embodiments, the capacitance value of the first capacitor is greater than or equal to 22 pF; the capacitance value of the second capacitor is less than or equal to 22 pF, and / or the capacitance value of the third capacitor is less than or equal to 22 pF.

[0011] In some embodiments, the capacitance of the second capacitor is 2 pF to 6 pF.

[0012] In some embodiments, the capacitance of the first capacitor is 31 picofarads to 35 picofarads.

[0013] In some embodiments, the second antenna includes a second feeding point; the distance between the second feeding point and the second grounding point is 30 mm-34 mm, and / or the distance between the second feeding point and the third grounding point is 20 mm-24 mm.

[0014] In some embodiments, the first antenna is an antenna covering the MHB frequency band, the N78 frequency band and the N79 frequency band; and / or the second antenna is an antenna covering the low frequency band.

[0015] According to a second aspect of an embodiment of the present disclosure, a middle frame assembly is provided, comprising: the antenna assembly described in any one of the first aspects; a frame, at least a portion of the frame being a metal part, and at least a portion of the metal part being a radiator of the first antenna and a radiator of the second antenna.

[0016] In some embodiments, the metal portion includes: a first portion and a second portion, the first portion extends in a first direction, and the second portion extends in a second direction.

[0017] In some embodiments, the frame includes: a first break, the first break is arranged in the first part between the first feeding point of the first antenna and the first grounding point; and a second break, the second break is arranged at an end of the second part away from the first part.

[0018] In some embodiments, the frame includes: a fourth grounding point, which is arranged on a side of the first portion away from the second portion; and a fifth grounding point, which is arranged on a side of the second gap opposite to the second portion.

[0019] According to a third aspect of an embodiment of the present disclosure, an electronic device is provided, comprising: the antenna assembly described in any one of the first aspect or the middle frame assembly described in any one of the second aspect.

[0020] In some embodiments, the first antenna is disposed at a head portion of the electronic device.

[0021] In some embodiments, the electronic device includes: a housing, at least a portion of the housing is a metal portion, and at least a portion of the metal portion is a radiator of the first antenna and a radiator of the second antenna.

[0022] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the present disclosure meets the design requirements of the first antenna radiation frequency band and optimizes the resonance efficiency of the antenna by setting the first capacitor as a large capacitor and setting the capacitance value of the second capacitor to be smaller than the capacitance value of the first capacitor, thereby improving the radiation efficiency of the antenna.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0025] Figure 1 It is a schematic structural diagram of an antenna assembly according to an exemplary embodiment.

[0026] Figure 2 The present invention is a schematic diagram of a current of a first antenna of an antenna assembly according to an embodiment of the related art.

[0027] Figure 3 is a schematic diagram of the current of the antenna assembly when the first antenna radiates according to a related technical embodiment

[0028] Figure 4 The antenna gain diagram of an antenna assembly is shown according to an embodiment of the related art.

[0029] Figure 5 is an antenna gain diagram of another antenna assembly according to an exemplary embodiment.

[0030] Figure 6 yes Figure 5 An enlarged schematic diagram of part E of FIG.

[0031] Figure 7 An antenna gain diagram of an antenna assembly is shown according to an exemplary embodiment.

[0032] Figure 8 An antenna gain diagram of an antenna assembly is shown according to an exemplary embodiment.

[0033] Fig. 9 An antenna gain diagram of an antenna assembly is shown according to an exemplary embodiment.

[0034] Fig.10 An antenna gain diagram of an antenna assembly is shown according to an exemplary embodiment. DETAILED DESCRIPTION

[0035] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0036] In the related art, in order to solve the problem of decreased antenna efficiency caused by insufficient capacitor return to ground, additional switches are required to adjust the length and radiation pattern of the antenna radiator, thereby changing the radiation pattern of the antenna, and through debugging and matching, the antenna can meet the corresponding radiation requirements through a combination of different radiation patterns.

[0037] However, the cost of the antenna assembly increases due to the addition of the switch, and the introduction of the switch increases the types of radiation states of the antenna, thereby increasing the difficulty of debugging the antenna.

[0038] In order to solve the above technical problems, according to an embodiment of the present disclosure, an antenna component is provided, wherein the antenna component includes: a first antenna and a second antenna; a plurality of grounding points, located between the first antenna and the second antenna, the plurality of grounding points including a first grounding point and a second grounding point, the first grounding point is grounded through a first capacitor, the second grounding point is grounded through a second capacitor, and compared with the first grounding point, the second grounding point is closer to the second antenna, wherein the capacitance value of the first capacitor is greater than the capacitance value of the second capacitor.

[0039] The present disclosure satisfies the design requirements of the first antenna radiation frequency band and optimizes the resonance efficiency of the antenna by setting the first capacitor as a large capacitor and setting the capacitance value of the second capacitor to be smaller than the capacitance value of the first capacitor, thereby improving the radiation efficiency of the antenna.

[0040] It can be understood that the antenna assembly involved in the present disclosure can be applicable to any terminal listed below.

[0041] It is understandable that the terminal involved in the present disclosure may also be referred to as a terminal device, a user equipment (User Equipment, UE), a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal, MT), etc., which is a device that provides voice and / or data connectivity to users. For example, the terminal may be a handheld device with a wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: a smart phone (Mobile Phone), a pocket computer (Pocket Personal Computer, PPC), a handheld computer, a personal digital assistant (Personal Digital Assistant, PDA), a laptop computer, a tablet computer, a wearable device, or a vehicle-mounted device, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device may also be a vehicle-mounted device. It should be understood that the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

[0042] Figure 1 It is a schematic structural diagram of an antenna assembly according to an exemplary embodiment.

[0043] In some embodiments, Figure 1 As shown, the antenna assembly includes: an antenna radiator 1, a first antenna 2, a second antenna 3 and a plurality of grounding points.

[0044] Antenna radiator 1, antenna radiator 1 can be an object with the function of radiating wireless signals. Exemplarily, antenna radiator 1 can be a metal radiator.

[0045] The first antenna 2 can be used to radiate signals of a specific frequency band. For example, the first antenna 2 can be used to radiate signals of the MHB frequency band, the N78 frequency band, and the N79 frequency band. The first antenna 2 can include a first feeding point 21 , which is disposed on the antenna radiator 1 .

[0046] The first feeding point 21 may be connected to an electronic circuit inside the electronic device. Exemplarily, the first feeding point 21 may transmit a radio signal received by the antenna radiator 1 to the electronic device or transmit an electrical signal of the electronic device to the antenna radiator 1 .

[0047] The second antenna 3 may be used to radiate a signal of a specific frequency band, and illustratively, the second antenna 3 may be used to radiate a signal of a LB frequency band. The second antenna 3 may include a second feeding point 31 , and the second feeding point 31 of the second antenna 3 is disposed on the antenna radiator 1 .

[0048] The second feeding point 31 may be connected to an electronic circuit inside the electronic device. Exemplarily, the second feeding point 31 may transmit a radio signal received by the antenna radiator 1 to the electronic device or transmit an electrical signal of the electronic device to the antenna radiator 1 .

[0049] like Figure 1 As shown, multiple grounding points can be located between the first antenna 2 and the second antenna 3. By setting multiple grounding points on the antenna radiator 1, the current can be returned to the ground through the grounding points, thereby isolating the first antenna 2 and the second antenna 3, reducing the coupling between the first antenna 2 and the second antenna 3, and improving the antenna efficiency.

[0050] The grounding point may include a first grounding point 4 and a second grounding point 5, and the first grounding point 4 may be grounded through a first capacitor 41, wherein the second grounding point 5 is closer to the second feeding point 31 than the first grounding point 4. The second grounding point 5 may be grounded through a second capacitor 51. By grounding the antenna radiator 1 through the first capacitor 41 and the second capacitor 51, the antenna radiator 1 becomes a suspended radiator, which can block direct current, prevent the signal strength of the antenna assembly from being weakened by the mainboard, and improve the radiation performance of the antenna assembly.

[0051] The larger the capacitance value of the first capacitor 41 is, the better the return effect of the first grounding point 4 is. By allowing most of the current starting from the first feeding point 21 to return to the ground via the first grounding point 4, the current is prevented from returning to the ground from the second grounding point 5, so that the radiation branch of the first antenna 2 is shorter, thereby meeting the radiation design requirements of the first antenna 2. Exemplarily, when the first antenna radiates the N78 frequency band and the N79 frequency band, the capacitance value of the first capacitor 41 can be greater than or equal to 22 pF.

[0052] The capacitance value of the second capacitor 51 can be smaller than the capacitance value of the first capacitor 41. By reducing the capacitance value of the second capacitor 51, the radiation interference caused by the induced current coupled by the second antenna 3 when the first antenna 2 radiates can be reduced, thereby optimizing the radiation efficiency of the antenna assembly.

[0053] In some embodiments, since the larger the capacitance value, the better the ground return effect, by setting the ratio of the capacitance value of the first capacitor 41 to the capacitance value of the second capacitor 51 in the range of 17:1 to 5:1, the ground return effect of the second capacitor 51 can be made smaller than the ground return effect of the first capacitor 41, thereby adjusting the current ratio of the ground return through the first grounding point 4 and the ground return through the second grounding point 5, thereby changing the induced current distribution on the first antenna 2, thereby improving the radiation efficiency of the antenna and enhancing the radiation gain of the first antenna 2.

[0054] In some embodiments, Figure 1 As shown, the grounding point may include a third grounding point 6 .

[0055] The third grounding point 6 may be grounded via a third capacitor 61 , the capacitance of the third capacitor 61 being smaller than the capacitance of the second capacitor 51 , and compared to the second grounding point 5 , the third grounding point 6 may be closer to the second feeding point 31 .

[0056] By setting three return grounding points, namely, the first grounding point 4, the second grounding point 5 and the third grounding point 6, on the antenna radiator 1, the current can be returned to the ground through the three grounding points, thereby further isolating the first antenna 2 and the second antenna 3, further reducing the coupling between the first antenna 2 and the second antenna 3, and improving the antenna efficiency. In addition, the antenna radiator 1 is grounded through the first capacitor 41, the second capacitor 51 and the third capacitor 61, so that the antenna radiator 1 becomes a suspended radiator, which can block the direct current, prevent the signal strength of the antenna component from being weakened by the mainboard, and improve the radiation performance of the antenna component.

[0057] Figure 2 The present invention is a schematic diagram of a current of a first antenna of an antenna assembly according to an embodiment of the related art. Figure 3 is a schematic diagram of the current of the antenna assembly when the first antenna radiates according to a related technical embodiment

[0058] In some embodiments, the capacitance value of the first capacitor 41' can be 31 pF to 35 pF. The larger the capacitance value of the first capacitor 41' is, the better the return effect of the first grounding point 4' is. For example, Figure 2 and Figure 3 As shown, by allowing most of the current starting from the first feeding point 21' to return to the ground via the first grounding point 4', the current is prevented from returning to the ground from the second grounding point 5', so that the radiation branches of the first antenna 2' are shorter, thereby meeting the radiation design requirements of the first antenna 2'. For example, when the first antenna 2' radiates, the radiator from the first slit 7' to the first grounding point 4' can be a parasitic branch of the first antenna 2'. By making the parasitic branches of the first antenna 2' as short as possible, the first antenna 2' can achieve coverage of the N78 and N79 frequency bands.

[0059] Exemplarily, the capacitance value of the first capacitor 41 ′ may be 33 pF.

[0060] like Figure 3 As shown, since the antenna radiator 1' adopts a capacitor return to ground solution, but the capacitor return to ground is not sufficient, when the first antenna 2' is working, the second antenna 3' will still couple with the first antenna 2' to generate an induced current, thereby reducing the radiation efficiency of the antenna component, and the induced current will generate corresponding interfering radiation, causing the radiation gain of the first antenna 2' to decrease.

[0061] For example, Figure 2 and Figure 3 As shown, when the first antenna 2' radiates 2.5 Hz frequency, generally speaking, at the 2.5 GHz radiation frequency, the first antenna 2 should have a 1 / 4 wavelength current mode from the first feeding point 21' to the first slit 7' as shown in FIG. Figure 2 shown. Figure 3 It shows that the side of the antenna radiator 1' in the related art couples a 2-wavelength current mode from the second slit 8' to the first slit 7'. According to the antenna length calculation, the two current modes resonate at the same frequency. At this time, part of the antenna efficiency of the first antenna 2' is coupled to the second antenna 3', resulting in a loss of radiation efficiency of the antenna component. Figure 3 In the related art shown, the return grounding point is returned to ground via a capacitor with a large capacitance value. For example, the capacitance values ​​of the second capacitor and the third capacitor can be greater than 22 pF.

[0062] When the second antenna 3 generates an induced current, part of the induced current generated on the second antenna 3 can return to the ground via the third grounding point 6, and the other part can return to the ground via the second grounding point 5, and a current loop may also be generated between the second grounding point 5 and the third grounding point 6.

[0063] Since the larger the capacitance value, the better the ground return effect, by setting the ratio of the capacitance value of the second capacitor 51 to the capacitance value of the third capacitor 61 in the range of 1.5:1 to 2.5:1, the ground return effect of the third capacitor 61 can be made smaller than the ground return effect of the second capacitor 51, thereby adjusting the current ratio of the ground return through the second grounding point 5 and the ground return through the third grounding point 6, thereby changing the induced current distribution on the second antenna 3, so that the induced current generated on the second antenna 3 can merge with the adjacent current and disappear, thereby reducing the induced current intensity on the second antenna 3 and the corresponding interfering radiation, thereby improving the radiation efficiency of the antenna and enhancing the radiation gain of the first antenna 2.

[0064] Exemplarily, the ratio of the capacitance value of the second capacitor 51 to the capacitance value of the third capacitor 61 may be set to 2:1.

[0065] In some embodiments, the capacitance value of the second capacitor 51 and the capacitance value of the third capacitor 61 are less than or equal to 22 pF. Since the larger the capacitance value, the better the ground return effect, when the capacitance value of the third capacitor 61 is greater than or equal to 22 pF, most of the induced current generated by the second antenna 3 will return to the ground through the third grounding point 6, and the induced current on the second antenna 3 will flow in a relatively uniform direction, so that the induced current generated on the second antenna 3 cannot merge with the adjacent currents and disappear.

[0066] When the capacitance value of the third capacitor 61 is less than or equal to 22 pF and the capacitance value of the second capacitor 51 is greater than or equal to 22 pF, most of the induced current generated by the second antenna 3 will return to the ground through the second grounding point 5, and the induced current on the second antenna 3 will flow in a relatively uniform direction, thereby preventing the induced current generated on the second antenna 3 from merging with the adjacent current and disappearing.

[0067] Therefore, setting the capacitance value of the second capacitor 51 and the capacitance value of the third capacitor 61 to less than or equal to 22 picofarads can enable the induced current on the second antenna 3 to better merge with the adjacent current and disappear, thereby reducing the induced current intensity and corresponding interfering radiation on the second antenna 3, thereby improving the radiation efficiency of the antenna and enhancing the radiation gain of the first antenna 2.

[0068] In some embodiments, the distance between the second feeding point 31 and the second grounding point 5 can be L2, L2 can be 30 mm-34 mm, and exemplary, L2 can be 32 mm. The distance between the second feeding point 31 and the third grounding point 6 can be L1, L1 can be 20 mm-24 mm, and exemplary, L1 can be 22 mm.

[0069] When the capacitance value of the third capacitor 61 is greater than 22 pF, most of the current transmitted from the second feeding point 31 to the antenna radiator 1 will return to the ground through the third grounding point 6. This results in the radiator length of the second antenna 3 being only L1, that is, 20 mm-24 mm of the distance between the second feeding point 31 and the third grounding point 6, when the second antenna 3 radiates. The shorter radiator length causes the loss of antenna efficiency of the second antenna 3.

[0070] By setting the capacitance value of the third capacitor 61 to be less than or equal to 22 pF, when the second antenna 3 radiates, part of the current can be returned to the ground through the third grounding point 6, and the length of the radiator at this time is L1, that is, 20 mm-24 mm, and the other part of the current can be returned to the ground through the second grounding point 5, and the length of the radiator at this time is L2, that is, 30 mm-34 mm. This increases the equivalent length of the second antenna 3, thereby improving the radiation efficiency of the second antenna 3.

[0071] In some embodiments, the capacitance value of the second capacitor 51 may be 2 picofarads to 6 picofarads, and the capacitance value of the third capacitor 61 may be 1 picofarad to 3 picofarads. Exemplarily, the capacitance value of the second capacitor 51 may be 5 picofarads, and the capacitance value of the third capacitor 61 may be 3 picofarads. By setting the capacitance values ​​of the second capacitor 51 and the third capacitor 61 within the above range, the induced current on the second antenna 3 can be better integrated with the adjacent current and disappear, thereby reducing the induced current intensity and corresponding interfering radiation on the second antenna 3, thereby improving the radiation efficiency of the antenna and enhancing the radiation gain of the first antenna 2.

[0072] By fixing the capacitance value of the first capacitor 41 to 33 pF and placing the third capacitor 61 in an open circuit state, by traversing the capacitance value of the second capacitor 51, it can be found that within the operating frequency of the first antenna 2, there will be two interfering radiations generated by the induced current of the second antenna 3, and the ratio between the frequency bands of the two interfering radiations is 2:1.

[0073] Figure 4 is an antenna gain diagram of an antenna assembly according to an embodiment of the related art. Figure 4 The figure shows the antenna efficiency reflected by the antenna S parameters when the capacitance value of the first capacitor 41 is fixed at 33 pF, the third capacitor 61 is fixed at 3 pF, and the capacitance value of the second capacitor 51 is 1 pF to 4 pF.

[0074] Among them, the capacitance value of the second capacitor 51 is 1 picofarad corresponding to curve 1, the capacitance value of the second capacitor 51 is 2 picofarad corresponding to curve 2, the capacitance value of the second capacitor 51 is 3 picofarad corresponding to curve 3, and the capacitance value of the second capacitor 51 is 4 picofarad corresponding to curve 4.

[0075] Figure 5 is an antenna gain diagram of another antenna assembly according to an exemplary embodiment. Figure 6 yes Figure 5 An enlarged schematic diagram of part E of FIG. Figure 5 and Figure 6 What is shown is the antenna efficiency reflected by the antenna S parameters when the capacitance value of the first capacitor 41 is fixed at 33 pF, the third capacitor 61 is fixed at 3 pF, and the capacitance value of the second capacitor 51 is 4 pF to 10 pF.

[0076] Among them, the capacitance value of the second capacitor 51 is 4 picofarads corresponding to curve 5, the capacitance value of the second capacitor 51 is 5 picofarads corresponding to curve 6, the capacitance value of the second capacitor 51 is 6 picofarads corresponding to curve 7, the capacitance value of the second capacitor 51 is 7 picofarads corresponding to curve 8, the capacitance value of the second capacitor 51 is 8 picofarads corresponding to curve 9, the capacitance value of the second capacitor 51 is 9 picofarads corresponding to curve 10, and the capacitance value of the second capacitor 51 is 10 picofarads corresponding to curve 11.

[0077] from Figure 4-Figure 6 It can be seen that according to the setting of this solution, curve 5-11 obtains better antenna radiation efficiency than curve 1-4, which is manifested in that the curve is smoother from the S parameter.

[0078] Figure 7 An antenna gain diagram of an antenna assembly is shown according to an exemplary embodiment. Figure 7What is shown is the antenna efficiency reflected by the antenna S parameter when the capacitance value of the first capacitor 41 is fixed at 33 pF, the third capacitor 61 is 1 pF, and the capacitance value of the second capacitor 51 is 2 pF. Circle A is the frequency band where the induced current generated by the second antenna 3 affects the antenna efficiency.

[0079] Figure 8 An antenna gain diagram of an antenna assembly is shown according to an exemplary embodiment. Figure 8 What is shown is the antenna efficiency reflected by the antenna S parameters when the capacitance value of the first capacitor 41 is fixed at 33 pF, the third capacitor 61 is 2 pF, and the capacitance value of the second capacitor 51 is 3 pF. Circle B is the frequency band where the induced current generated by the second antenna 3 affects the antenna efficiency.

[0080] Fig. 9 An antenna gain diagram of an antenna assembly is shown according to an exemplary embodiment. Fig. 9 What is shown is the antenna efficiency reflected by the antenna S parameter when the capacitance value of the first capacitor 41 is fixed at 33 pF, the third capacitor 61 is 2 pF, and the capacitance value of the second capacitor 51 is 4 pF. Circle C is the frequency band where the induced current generated by the second antenna 3 affects the antenna efficiency.

[0081] Fig.10 An antenna gain diagram of an antenna assembly is shown according to an exemplary embodiment. Fig.10 What is shown is the antenna efficiency reflected by the antenna S parameters when the capacitance value of the first capacitor 41 is fixed at 33 pF, the third capacitor 61 is 3 pF, and the capacitance value of the second capacitor 51 is 5 pF. Circle D is the frequency band where the induced current generated by the second antenna 3 affects the antenna efficiency.

[0082] from Figure 7-10 It can be seen that when the ratio of the capacitance value of the second capacitor 51 to the capacitance value of the third capacitor 61 is close to 2:1, the resonance depression of the interfering radiation is shallower from the S parameter, and the impact on efficiency is also less. This is because the frequency relationship between the two interfering radiations is approximately a double frequency relationship, so under this capacitor combination, the interfering radiation and the adjacent current mode merge or even almost disappear, and the current mode of the interfering radiation is destroyed, so that the resonance of the interfering radiation is weakened or disappears. From the S parameter, it is shown that the curve is smoother.

[0083] Exemplarily, the capacitance value of the second capacitor 51 may be 5 pF, and the capacitance value of the third capacitor 61 may be 3 pF.

[0084] In other embodiments, the ratio of the capacitance value of the second capacitor 51 to the capacitance value of the third capacitor 61 can be changed according to the frequency relationship between the interfering radiations. Exemplarily, when the frequency relationship between the two interfering radiations is 4:1, the ratio of the capacitance value of the second capacitor 51 to the capacitance value of the third capacitor 61 can be 4:1.

[0085] In the related art, in order to solve the problem of decreased antenna efficiency caused by insufficient capacitor return to ground, additional switches are required to adjust the length and radiation pattern of the antenna radiator, thereby changing the radiation pattern of the antenna, and through debugging and matching, the antenna can meet the corresponding radiation requirements through a combination of different radiation patterns.

[0086] The present disclosure reduces the cost of the antenna assembly by avoiding adding switches, and reduces the types of radiation states of the antenna, thereby reducing the difficulty of debugging the antenna.

[0087] In some embodiments, the first antenna 2 is an antenna covering the MHB band, the N78 band and the N79 band, wherein the MHB band may be 1000MHz-3000MHz, the N78 band may be 3.3GHz-3.8GHz, and the N79 band may be 4.4GHz-5GHz. The second antenna 3 is an antenna covering the low frequency band, wherein the low frequency band may be 700MHz-960MHz.

[0088] This allows the antenna assembly to meet the signal requirements of the electronic device. For example, this can meet the signal requirements of the electronic device for 3G signals, 4G signals, and 5G signals, thereby allowing the signal frequency band of the electronic device to cover more usage scenarios.

[0089] Based on the same concept, an embodiment of the present disclosure also provides a middle frame assembly.

[0090] like Figure 1 As shown, the middle frame assembly may include an antenna assembly and a frame, wherein at least a portion of the frame may be a metal portion made of a metal material, wherein at least a portion of the metal portion made of a metal material may be an antenna radiator 1. Using the metal portion as the antenna radiator 1 of the antenna assembly may save some of the layout space of the antenna assembly, may provide a larger stacking space for the electronic device, and may contribute to the development of thinner and lighter electronic devices.

[0091] In some embodiments, Figure 1 As shown, the antenna radiator 1 may include a first portion 100 and a second portion 200, the first portion 100 extends in a first direction, and the second portion 200 extends in a second direction. Exemplarily, the antenna radiator 1 may be disposed at a corner of a frame, the first portion 100 may be formed by a portion of a side of the frame, and the second portion 200 may be disposed at a portion of another side of the frame.

[0092] The present disclosure is not limited thereto, and the first portion 100 and the second portion 200 may also be arranged to extend in the same direction, that is, the antenna radiator 1 may be completely arranged on a straight side edge of the frame.

[0093] In some embodiments, Figure 1 As shown, the frame may include: a fourth grounding point 91, which may be disposed on a side of the first portion 100 away from the second portion 200; and a fifth grounding point 92, which may be disposed on a side of the second slit 8 opposite to the second portion 200. The fourth grounding point 91 may provide a grounding position for the first antenna 2, and the fifth grounding point 92 may provide a grounding position for the second antenna 3.

[0094] In some embodiments, Figure 1 As shown, the frame may include: a first break 7 and a second break 8 .

[0095] The first slit 7 can be arranged at the first part 100 between the first feeding point 21 and the first grounding point 4; the second slit 8 can be arranged at the end of the second part 200 away from the first part 100. The first slit 7 and the second slit 8 can prevent the metal part of the frame from continuously forming a conductive loop to affect the signal reception and transmission.

[0096] Based on the same concept, an embodiment of the present disclosure also provides an electronic device.

[0097] The electronic device may be a laptop computer, a desktop computer, a mobile phone, a digital broadcast terminal, a message transceiver device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, a translator, and a wearable device such as a watch or a bracelet, and may be any electronic device having an antenna assembly. In the following description, a mobile phone is used as an example, but the present disclosure is not limited thereto.

[0098] In some embodiments, the electronic device may include an antenna assembly. The antenna assembly may be used to provide the electronic device with the functions of transmitting and receiving wireless signals, so that the electronic device can transmit and receive wireless signal information to and from the outside.

[0099] The antenna assembly can be electrically connected to the mainboard of the electronic device, and the mainboard of the electronic device can transmit an electric current of a specific frequency to the antenna assembly, so that the antenna assembly generates a radiation signal of a specific frequency band, thereby enabling the electronic device to transmit specific wireless signal information to the outside world.

[0100] When the antenna assembly receives a radiation signal, the antenna assembly can generate an electric current of a corresponding frequency and transmit it to the mainboard of the electronic device, thereby enabling the electronic device to receive specific wireless signal information transmitted from the outside world.

[0101] In some embodiments, the electronic device may include a middle frame assembly, and the first section of the frame of the middle frame assembly may be the antenna radiator 1 of the antenna assembly. Exemplarily, the first section of the frame may be made of metal, wherein at least a portion of the first section of the metal material may be the antenna radiator 1 of the antenna assembly.

[0102] In some embodiments, the first antenna 2 can be disposed on the head of the electronic device. Since the mainboard of the electronic device is generally disposed on the head of the electronic device, placing the first antenna 2 on the top of the electronic device can shorten the distance between the antenna assembly and the electronic device, avoiding the need to set up an additional signal transmission line and affecting the signal quality. The head of the electronic device can be the upper half of the electronic device in the length direction.

[0103] In some embodiments, the electronic device may include: a housing, the first section of which may be an antenna radiator 1 of an antenna assembly, and illustratively, the first section of the housing may be made of metal, and the first section of the housing may be the antenna radiator 1. The housing may be used to protect and shield internal components of the electronic device.

[0104] Since the shell can conduct electricity, that is, the shell can allow current of a specific frequency to flow through the metal part, at least a portion of the shell can be constructed as the antenna radiator 1 of the antenna assembly. Using a portion of the shell as the antenna radiator 1 can save some layout space of the antenna assembly, provide a larger stacking space for the electronic device, and contribute to the development of lighter and thinner electronic devices.

[0105] In some embodiments, the housing can be made entirely of metal, so that the electronic device forms a full metal housing electronic device. The metal housing has a good grip feel and the aesthetics brought by the metal texture and metal luster, which can improve the appearance quality of the electronic product and enhance the user experience.

[0106] The embodiment of the present disclosure satisfies the design requirements of the radiation frequency band of the first antenna 2 and optimizes the resonance efficiency of the antenna, thereby improving the radiation efficiency of the antenna, by setting the first capacitor 41 as a large capacitor and setting the capacitance value of the second capacitor 51 to be smaller than the capacitance value of the first capacitor 41.

[0107] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0108] It is further understood that the terms "second", "secondary", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other and do not indicate a specific order or degree of importance. In fact, the expressions "secondary", "secondary", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the second information may also be referred to as the second information, and similarly, the second information may also be referred to as the second information.

[0109] It will be further understood that the terms “center”, “longitudinal”, “lateral”, “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0110] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

[0111] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0112] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following scope of rights.

[0113] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. An antenna assembly, characterized in that: The antenna assembly comprises: a first antenna and a second antenna; a plurality of grounding points, located between the first antenna and the second antenna, the plurality of grounding points including a first grounding point and a second grounding point, the first grounding point being grounded via a first capacitor, the second grounding point being grounded via a second capacitor, and the second grounding point being closer to the second antenna than the first grounding point, The capacitance value of the first capacitor is greater than the capacitance value of the second capacitor.

2. The antenna assembly according to claim 1, characterized in that: A ratio of a capacitance value of the first capacitor to a capacitance value of the second capacitor is 17:1 to 5:

1.

3. The antenna assembly according to claim 1, characterized in that: The grounding point includes a third grounding point, the third grounding point is grounded via a third capacitor, and compared to the first grounding point, the third grounding point is closer to the first antenna.

4. The antenna assembly according to claim 3, characterized in that: The capacitance value of the third capacitor is smaller than the capacitance value of the second capacitor.

5. The antenna assembly according to claim 3, characterized in that: A ratio of a capacitance value of the second capacitor to a capacitance value of the third capacitor is 1.5:1 to 2.5:

1.

6. The antenna assembly according to claim 3, characterized in that: The capacitance value of the third capacitor is 1 pF to 3 pF.

7. The antenna assembly according to claim 3, characterized in that: The capacitance value of the first capacitor is greater than or equal to 22 pF; The capacitance value of the second capacitor is less than or equal to 22 pF, and / or The capacitance value of the third capacitor is less than or equal to 22 pF.

8. The antenna assembly according to claim 3, characterized in that: The capacitance of the second capacitor is 2 pF to 6 pF.

9. The antenna assembly according to claim 3, characterized in that: The capacitance value of the first capacitor is 31 pF to 35 pF.

10. The antenna assembly according to claim 7, characterized in that: The second antenna includes a second feed point; The distance between the second feeding point and the second grounding point is 30 mm to 34 mm, and / or The distance between the second feeding point and the third grounding point is 20 mm-24 mm.

11. The antenna assembly according to claim 7, characterized in that: The first antenna is an antenna covering the MHB frequency band, the N78 frequency band and the N79 frequency band; and / or The second antenna is an antenna covering a low frequency band.

12. A middle frame assembly, characterized in that: include: The antenna assembly according to any one of claims 1 to 11; A frame, at least a first section of which is a radiator of the first antenna and a radiator of the second antenna.

13. The middle frame assembly according to claim 12, characterized in that: The first section of the frame includes a first portion and a second portion, the first portion extends in a first direction, and the second portion extends in a second direction.

14. The middle frame assembly according to claim 13, characterized in that: The frame includes: a first break, the first break being provided in the first portion between the first feeding point and the first grounding point of the first antenna; A second break is provided at an end of the second portion away from the first portion.

15. The middle frame assembly according to claim 14, characterized in that: The frame includes: a fourth grounding point, the fourth grounding point being arranged on a side of the first portion away from the second portion; A fifth grounding point is disposed on a side of the second slit opposite to the second portion.

16. An electronic device, characterized in that: include: The antenna assembly as claimed in any one of claims 1 to 11 or the middle frame assembly as claimed in any one of claims 12 to 15.

17. The electronic device according to claim 16, characterized in that: The first antenna is arranged on the head of the electronic device.

18. The electronic device according to claim 16, characterized in that: The electronic device comprises: A shell, at least a first section of which is a radiator of the first antenna and a radiator of the second antenna.

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