Antenna system and electronic equipment

Abstract

The invention provides an antenna system and electronic equipment, and the antenna system comprises a first antenna and a second antenna which are relatively far away from each other on a frame of the electronic equipment, the first antenna and the second antenna are configured to have working frequency bands at least comprising a Bluetooth frequency band, and the antenna system also comprises at least one third antenna, the third antenna is disposed on a current conduction path of the first antenna and the second antenna, and the third antenna is configured to generate a resonant mode including a Bluetooth frequency band. According to the embodiment of the invention, the third antenna is arranged on the current conduction path of the first antenna and the second antenna, so that a choke effect is formed at the position of the third antenna when the induction current of the Bluetooth frequency band is transmitted along the metal frame, thereby improving the isolation degree of the independent Bluetooth antenna and a traditional Bluetooth / WiFi antenna, and improving the user experience. According to the embodiment of the invention, high-availability coexistence of the independent Bluetooth and the Bluetooth / WiFi antenna is realized, and the independent Bluetooth antenna is added, so that the Bluetooth performance of the electronic equipment can be effectively improved, and the Bluetooth transmission rate and stability are improved.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technologies, and particularly to an antenna system and an electronic device. Background Art

[0002] With the development of wireless communication technologies, the communication frequency bands that mobile terminals need to support are continuously increasing, and the number of antennas is also increasing, which brings great challenges to the antenna design of mobile terminals.

[0003] In related technologies, the Bluetooth frequency band of a mobile terminal usually shares the same antenna with the WiFi 2.4G frequency band, resulting in difficulty in achieving the best Bluetooth performance. An independent Bluetooth antenna can effectively improve the user experience in the Bluetooth scenario, but in the limited space of a mobile terminal, it is difficult to ensure the isolation requirement between the independent Bluetooth antenna and the conventional Bluetooth / WiFi antenna. Summary of the Invention

[0004] To implement an independent Bluetooth antenna in a mobile terminal, embodiments of the present disclosure provide an antenna system and an electronic device having the antenna system.

[0005] In a first aspect, embodiments of the present disclosure provide an antenna system.

[0006] The antenna system includes a first antenna and a second antenna that are arranged relatively far apart on the frame of the electronic device. The first antenna and the second antenna are configured to have a working frequency band that at least includes the Bluetooth frequency band.

[0007] The antenna system further includes at least one third antenna. The third antenna is located on the current conduction path of the first antenna and the second antenna, and the third antenna is configured to generate a resonance mode that includes the Bluetooth frequency band.

[0008] In some embodiments, the third antenna is close to being coupled to the frame of the electronic device, and the coupling frequency band between the third antenna and the frame of the electronic device includes the Bluetooth frequency band.

[0009] In some embodiments, the frame is enclosed by two parallel short sides and two parallel long sides. The first antenna is disposed on the top short side of the electronic device or at a position on any long side close to the top short side, and the second antenna is disposed on the bottom short side of the electronic device or at a position on any long side close to the bottom short side.

[0010] In some embodiments, the third antenna includes a first radiation branch. The length direction of the first radiation branch is parallel to the long side, and the first radiation branch is close to being coupled to at least one of the first long side and the second long side.

[0011] In some embodiments, the antenna system further includes a fourth antenna disposed at the second long side and near the top short side, and the fourth antenna is configured to have an operating frequency band including a medium-high frequency band;

[0012] The fourth antenna includes a second radiation branch formed by a partial border of the second long side, and a first parasitic branch coupled to the second radiation branch through a first gap, and the third antenna is disposed near the first gap.

[0013] In some embodiments, the third antenna further includes a feeding end for feeding the first radiation branch and a grounding end for grounding the first radiation branch. Both the feeding end and the grounding end are disposed near one side of the length direction of the first radiation branch, and the distance between the feeding end and the first gap is less than the distance between the grounding end and the second gap.

[0014] In some embodiments, the antenna system further includes a fifth antenna disposed at the first long side and near the bottom short side, and the fifth antenna is configured to have an operating frequency band including a low frequency band;

[0015] The fifth antenna includes a third radiation branch formed by a partial border of the bottom short side and a partial border of the first long side, and a second parasitic branch coupled to the third radiation branch through a second gap, and the third antenna is disposed near the second gap.

[0016] In some embodiments, the third antenna includes an LDS antenna or an FPC antenna.

[0017] In some embodiments, the first antenna is configured to have an operating frequency band including a Bluetooth band and a WiFi band;

[0018] The second antenna is configured to have an operating frequency band including a medium-high frequency band and the Bluetooth band.

[0019] In a second aspect, embodiments of the present disclosure provide an electronic device including the antenna system according to any embodiment of the first aspect.

[0020] The antenna system of the present disclosure embodiment includes a first antenna and a second antenna that are arranged relatively far away on the frame of the electronic device. The first antenna and the second antenna are configured such that the operating frequency band at least includes the Bluetooth frequency band. The antenna system further includes at least one third antenna, which is disposed on the conduction paths of the first antenna and the second antenna. The third antenna is configured to generate a resonance mode including the Bluetooth frequency band. In the present disclosure embodiment, by arranging the third antenna on the current conduction paths of the first antenna and the second antenna, when the induced current in the Bluetooth frequency band propagates along the metal frame, a choke effect is formed at the position of the third antenna, thereby improving the isolation between the independent Bluetooth antenna and the traditional Bluetooth / WiFi antenna, realizing the highly available coexistence of the independent Bluetooth and the Bluetooth / WiFi antenna. Moreover, since an independent Bluetooth antenna is added, the Bluetooth performance of the electronic device can be effectively improved, and the Bluetooth transmission rate and stability can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is a schematic structural diagram of an electronic device according to some embodiments of the present disclosure.

[0023] Figure 2 is a schematic structural diagram of an antenna system according to some embodiments of the present disclosure.

[0024] Figure 3 is a schematic structural diagram of an antenna system according to some embodiments of the present disclosure.

[0025] Figure 4 is a schematic structural diagram of an antenna system according to some embodiments of the present disclosure.

[0026] Figure 5 is a schematic structural diagram of an antenna system according to some embodiments of the present disclosure.

[0027] Figure 6 is a schematic structural diagram of an antenna system according to some embodiments of the present disclosure.

[0028] Figure 7 is a structural block diagram of an electronic device according to some embodiments of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the protection scope of the present disclosure. In addition, the technical features involved in different embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

[0030] With the development of wireless communication technologies, the communication frequency bands that mobile terminals need to support are continuously increasing. Especially for relatively high-end flagship mobile phone products, they almost need to cover various antenna frequency bands such as 2G, 3G, 4G, 5G, Bluetooth, WiFi, and satellite positioning. Therefore, the number of antennas included in the terminal is also increasing, which poses a great challenge to the antenna design of mobile terminals.

[0031] In related technologies, since the Bluetooth frequency band (2.4 GHz - 2.485 GHz) and the WiFi 2.4G frequency band (2.4 GHz - 2.4835 GHz) are almost the same frequency, in the limited space of mobile phones, it is often designed that the Bluetooth frequency band and the WiFi 2.4G frequency band share the same antenna, resulting in the Bluetooth performance being difficult to reach the best. In scenarios with poor anechoic environment, problems such as slow Bluetooth data transmission rate and packet loss often occur.

[0032] Independent Bluetooth, as the name implies, refers to a solution that is different from the conventional scheme of sharing the same antenna with WiFi. Independent Bluetooth can be used only for the Bluetooth frequency band, thereby effectively improving the user experience in Bluetooth scenarios and greatly improving the experience in scenarios such as Bluetooth wireless earphones and Bluetooth mutual transmission.

[0033] However, in a compact space, the isolation between the independent Bluetooth antenna and the conventional Bluetooth / WiFi antenna is a difficult point in antenna design.

[0034] In order to achieve the coexistence of a highly available independent Bluetooth antenna and a conventional Bluetooth / WiFi antenna in a compact device space and improve the Bluetooth performance of mobile terminals, the embodiments of the present disclosure provide an antenna system and an electronic device having the antenna system.

[0035] In a first aspect, the embodiments of the present disclosure provide an antenna system, which can be used in an electronic device. In the embodiments of the present disclosure, the electronic device can be any suitable device type, such as a smart phone, a personal digital assistant, a wearable device, etc., and the present disclosure does not limit this.

[0036] In some embodiments, taking a smartphone as an example of an electronic device, the main body structure of the smartphone often includes a carrier frame made of a metal material. On the one hand, the carrier frame is used as the main body support structure of the mobile phone to assemble various structures such as the main board, sensors, display module, and back panel.

[0037] On the other hand, the edge of the carrier frame serves as the metal frame of the mobile phone. Currently, the antenna of the smartphone generally forms an antenna radiator by opening a slit in the metal frame. At the same time, the antenna radiator also serves as the outer side frame of the mobile phone. Therefore, there are many limitations for the antenna design of the smartphone. For example, the clearance environment of the smartphone is limited, and the antenna layout is crowded; for another example, the appearance requirements of the smartphone are relatively high, the slit structure is symmetric and beautiful, and the number of slits is as small as possible; for another example, the smartphone requires a large number of communication frequency bands and high radiation performance requirements; for another example, the SAR (Specific Absorption Ratio) value of the smartphone is strictly required; and so on.

[0038] For example Figure 1 FIG. shows the structure of a smartphone in some embodiments of the present disclosure. The mobile phone includes a frame body 100, a screen assembly 200, and a back panel 300. The frame body 100 serves as the main body support structure of the mobile phone, and various electrical and structural elements of the mobile phone can be arranged thereon. For example, one side of the frame body 100 is used to install the screen assembly 200 to form the front of the mobile phone, and the other side of the frame body 100 is used to install the back panel 300 to form the back of the mobile phone.

[0039] The frame body 100 includes a bearing part 120 and a frame 110 formed around the edge of the bearing part 120. After the screen assembly 200 and the back panel 300 are encapsulated, the frame 110 can serve as the outer side frame of the mobile phone. The frame body 100 can generally be made of a metal material such as aluminum alloy or stainless steel, so that the frame 110 can serve as the metal radiator of the mobile phone antenna system. By opening a slit in the frame 110 and connecting the corresponding radio frequency circuit, signal communication of various frequency bands of the mobile phone can be realized.

[0040] Of course, other various electrical structures can also be included in the smartphone, which are not shown in the embodiments of the present disclosure. Figure 1 For example, a circuit board, various sensors, a battery, etc. are usually arranged between the bearing part 120 of the frame body 100 and the back panel 300. Those skilled in the art can understand this, and the present disclosure will not elaborate further.

[0041] In addition, for the convenience of understanding and description, the frequency bands included in the low frequency (LB), medium-high frequency (MHB), and high frequency (HB) in the antenna field are described below.

[0042] The frequency range of the low - frequency (LB) band is approximately 700 MHz to 960 MHz, which mainly includes B5, B8, B12, B17, B20, B28 of the LTE (Long Term Evolution) standard; GSM850, GSM900 of the GSM (Global System for Mobile Communications) standard; CDMA0, WCDMA5, WCDMA8 of the CDMA (Code Division Multiple Access) standard; and the N28 band of the 5G standard.

[0043] The frequency range of the medium - high - frequency (MHB) band is approximately 1710 MHz to 2690 MHz, which mainly includes B1, B3, B4, B7, B34, B38, B39, B40, B41 of the LTE standard; GSM1800, GSM1900 of the GSM standard; WCDMA1, WCDMA2, WCDMA3, WCDMA4 of the CDMA standard; and the N1, N3, N7, N38, N41 bands of the 5G standard.

[0044] The high - frequency (HB) band mainly includes the N77 band (frequency range 3.3 GHz to 4.2 GHz), N78 band (frequency range 3.3 GHz to 3.8 GHz), and N79 band (frequency range 4.8 GHz to 4.9 GHz) of the 5G standard.

[0045] It can be understood that the low - frequency band described in the following text of this disclosure refers to at least one of the above - mentioned LB bands, the medium - high - frequency band refers to at least one of the above - mentioned MHB bands, and the high - frequency band refers to at least one of the above - mentioned HB bands. Unless otherwise specified, this disclosure will not elaborate further on this.

[0046] Figure 2 The structural schematic diagram of the frame antenna system of a mobile terminal in the related art is shown. Only some of the antennas in the antenna system are shown in the figure, rather than all of them, and only the antenna radiators formed by the frame are shown. Circuits such as feeding, grounding, and tuning included in the antenna are not shown. However, those skilled in the art can undoubtedly understand and fully implement it with reference to the related art, and this disclosure will not elaborate further on this.

[0047] In Figure 2 the example, the antenna ANT1 is generally used as a conventional Bluetooth / WiFi antenna. Since the Bluetooth band and the WiFi band share the same antenna, the Bluetooth performance is poor.

[0048] In order to add an independent Bluetooth antenna on the basis of the original antenna system, a relatively easy-to-think-of solution could be to add an LDS (Laser Direct Structuring) or FPC (Flexible Printed Circuit) antenna inside the mobile terminal as the independent Bluetooth antenna.

[0049] However, for compact space devices such as mobile phones, to ensure that the isolation between the independent Bluetooth antenna and the top Bluetooth / WiFi antenna ANT1 meets the requirement of -30 dB, the antenna efficiency of the independent Bluetooth antenna is only -10 dB to -12 dB, which cannot meet the usage requirements. If the performance of the independent Bluetooth antenna is improved (such as increasing the transmission power, adjusting the radiation direction, etc.), the isolation between the independent Bluetooth antenna and the top Bluetooth / WiFi antenna ANT1 will deteriorate to about -17 dB, and the isolation cannot meet the usage requirements.

[0050] It can be seen that simply increasing the number of antennas through conventional means cannot meet the performance requirements of the independent Bluetooth and Bluetooth / WiFi antennas, and the coexistence of the independent Bluetooth and conventional Bluetooth / WiFi antennas cannot be achieved.

[0051] Therefore, in the embodiments of the present disclosure, as shown in combination with Figure 2 the independent Bluetooth antenna can be set at the position of the bottom ANT2 antenna of the mobile terminal, and by setting a third antenna on the current conduction path between the antenna ANT1 and the antenna ANT2, decoupling of the bottom independent Bluetooth ANT2 and the top Bluetooth / WiFi antenna is achieved, enabling the high-availability coexistence of the two Bluetooth antennas.

[0052] It is worth noting that the bottom ANT2 antenna is generally the mid-high frequency (MHB) band antenna in the mobile phone. Among them, B40 (frequency range: 2300 MHz to 2400 MHz) is an essential mid-high frequency band for the mobile terminal. The B40 band is the same frequency as Bluetooth 2.4 GHz. Therefore, by using the mid-high frequency band to be compatible with the independent Bluetooth, the design of the independent Bluetooth antenna can be easily achieved without changing the frame structure.

[0053] In addition, as shown in combination with Figure 2 it can be known that the Bluetooth / WiFi antenna ANT1 is located in the upper left corner area of the mobile terminal, while the independent Bluetooth antenna ANT2 is located in the lower right corner area of the mobile terminal. Thus, ANT1 and ANT2 are the farthest apart in the physical space, so the influence of spatial propagation can be reduced to a certain extent, and the isolation between the two antennas can be improved.

[0054] However, it can be understood that, in addition to spatial propagation, the main factor affecting the antenna isolation is the mutual coupling of the antenna current passing through other antennas such as the metal frame and the floor. Due to the coupling effect, the antenna will generate an induced current on the metal frame, thereby deteriorating the isolation between the bottom independent Bluetooth antenna ANT2 and the top Bluetooth / WiFi antenna.

[0055] Therefore, simply increasing the physical space distance between ANT1 and ANT2 cannot meet the isolation requirements of the two Bluetooth antennas. In the embodiments of the present disclosure, by further providing a third antenna and arranging the third antenna on the current conduction path between the first antenna ANT1 and the second antenna ANT2, a choke effect is formed at the position of the third antenna for the induced current in the Bluetooth band, so as to prevent the induced current from propagating along the metal frame and affecting the antenna isolation.

[0056] In the following embodiments of the present disclosure, the electronic device will take a smart phone as an example, and the antenna system is a frame antenna system mainly arranged based on the frame of the smart phone.

[0057] For ease of understanding and description below, in combination with Figure 2 As shown, the frame of the smart phone is generally a rectangular (or rounded rectangle) structure, and its frame is enclosed by two parallel short sides and two parallel long sides. In the embodiments of the present disclosure, the top side of the frame is defined as the "top short side", the bottom side of the frame is defined as the "bottom short side", the left side of the frame is defined as the "first long side", and the right side of the frame is defined as the "second long side". The antenna system of the embodiments of the present disclosure will be described below in combination with Figure 3 to illustrate.

[0058] As Figure 3 shown, in some embodiments, the antenna system of the example of the present disclosure includes a first antenna ANT1, a second antenna ANT2, and a third antenna ANT3.

[0059] The first antenna ANT1 is configured to have a working frequency band including the Bluetooth band and the WiFi band, that is, the first antenna ANT1 is a Bluetooth / WiFi antenna. The second antenna ANT2 is configured to have a working frequency band including at least the Bluetooth band, that is, the second antenna ANT2 is an independent Bluetooth antenna.

[0060] In the embodiments of the present disclosure, both the first antenna ANT1 and the second antenna ANT2 are frame antennas, that is, the radiator of the antenna is formed by opening a slit in the metal frame of the electronic device, and the corresponding resonant frequency is achieved by feeding and grounding the radiator. In the drawings of the embodiments of the present disclosure, only the radiator part of the antenna is shown, and the electrical part of the antenna system is not shown. For example, the circuit structures of circuits such as the feeding, grounding, and tuning of the antenna are not shown. Those skilled in the art can understand this, and the present disclosure will not elaborate further.

[0061] In the embodiments of the present disclosure, the first antenna and the second antenna are arranged relatively far apart on the frame of the electronic device. For example Figure 3 In the example, the first antenna ANT1 is arranged on the short side at the top, and the second antenna ANT2 is arranged on the short side at the bottom. Moreover, the first antenna ANT1 is arranged close to the first long side, and the second antenna ANT2 is arranged close to the second long side. That is, in the length direction of the electronic device, the first antenna ANT1 and the second antenna ANT2 are respectively arranged on the upper and lower sides, and in the width direction of the electronic device, the first antenna ANT1 and the second antenna ANT2 are respectively arranged on the left and right sides.

[0062] It can be understood that in Figure 3 In the example, the first antenna ANT1 and the second antenna ANT2 are arranged diagonally, so that the first antenna ANT1 and the second antenna ANT2 are farthest apart in the physical space, thereby minimizing the influence of spatial propagation and improving the isolation between the two antennas.

[0063] However, as can be seen from the foregoing, increasing only the spatial distance cannot make the isolation between the first antenna ANT1 and the second antenna ANT2 meet the requirements. Therefore, in the embodiments of the present disclosure, the third antenna ANT3 can be arranged on the current conduction path between the first antenna ANT1 and the second antenna ANT2. The resonant frequency of the third antenna ANT3 includes the Bluetooth band, that is, the frequency band of the third antenna ANT3 includes the 2.4 GHz band. For example, the third antenna ANT3 can be a medium-high frequency MHB antenna, and its operating frequency band covers the Bluetooth band.

[0064] It can be understood that in the embodiments of the present disclosure, the radiation conduction of the first antenna ANT1 and the second antenna ANT2 can be mainly divided into spatial conduction and frame conduction. Spatial conduction means that the radiation energy of one antenna is transmitted through space to another antenna to generate energy coupling, and frame conduction means that the radiation energy of one antenna is transmitted along the metal frame in the form of induced current to another antenna to form current coupling.

[0065] Therefore, in the embodiments of the present disclosure, in order for the third antenna ANT3 to achieve decoupling between the first antenna ANT1 and the second antenna ANT2, the third antenna ANT3 can either decouple the spatial conduction between the first antenna ANT1 and the second antenna ANT2, or decouple the metal frame current conduction path between the first antenna ANT1 and the second antenna ANT2.

[0066] For example, in some embodiments, the third antenna ANT3 can be closely coupled to the metal frame, and the coupling frequency band between the third antenna ANT3 and the frame of the electronic device includes the Bluetooth frequency band, so as to form a choke effect on the Bluetooth 2.4 GHz frequency band between the first antenna ANT1 and the second antenna ANT2, eliminate or mitigate the propagation of the induced current on the metal frame, and improve the isolation between the first antenna ANT1 and the second antenna ANT2.

[0067] Of course, those skilled in the art can understand that the third antenna ANT3 may not be closely coupled to the metal frame, and only decouple the spatial conduction between the first antenna ANT1 and the second antenna ANT2. In theory, the isolation between the first antenna ANT1 and the second antenna ANT2 can also be improved. However, since the energy of the metal frame antenna is mainly propagated through the induced current on the frame, using the third antenna ANT3 to be closely coupled to the frame can further choke the current conducted on the frame between the first antenna and the second antenna, and has a better choke effect on the first antenna ANT1 and the second antenna ANT2.

[0068] In the embodiments of the present disclosure, in combination with the rectangular frame structure of the electronic device, it can be understood that the induced current generated by the second antenna ANT2 at the bottom can reach the first antenna ANT1 at the top along the frames on the left and right sides. Therefore, the third antenna for coupling and choking can be arranged on the first long side, or on the second long side, or one third antenna can be arranged on each of the first long side and the second long side. The following of the present disclosure will explain this.

[0069] In the embodiments of the present disclosure, the role of the third antenna is to be coupled with the metal frame, and form a stop band for the Bluetooth frequency band (2.4 GHz) through the coupling effect. Thus, when the induced current generated by the first antenna ANT1 or the second antenna ANT2 on the metal frame passes through this position, a choke effect on the induced current can be formed to prevent the induced current from continuing to propagate along the metal frame. It can be understood that since it is necessary to use the third antenna to form a stop band for the Bluetooth frequency band, it is necessary to configure the operating frequency band of the third antenna to be at least partially the same as the Bluetooth 2.4 GHz frequency band.

[0070] In some embodiments, the antenna form of the third antenna can adopt an LDS antenna or an FPC antenna, and the present disclosure does not limit this.

[0071] In Figure 3 the embodiments, the third antenna ANT3 is closely coupled to the frame of the second long side. Specifically, the frame antenna system of the electronic device may further include a fourth antenna ANT4. The fourth antenna ANT4 can be a medium-high frequency (MHB) antenna. The fourth antenna ANT4 is arranged on the second long side and near the top short side, that is, at the upper right corner position of the metal frame.

[0072] The fourth antenna ANT4 includes a second radiation branch 102 and a first parasitic branch 201 that is coupled to the second radiation branch 102 through a first gap, so that the third antenna ANT3 can be disposed near the position of the first gap.

[0073] Both the second radiation branch 102 and the first parasitic branch 201 are radiators formed by opening a slit in the metal frame. The second radiation branch 102 and the first parasitic branch 201 are coupled through the first gap. Thus, after feeding the second radiation branch 102, the first parasitic branch 201 on the opposite side can be used as an antenna parasitic structure.

[0074] Combined with the foregoing, the operating frequency band of the fourth antenna ANT4 is the medium and high frequency band. The B40 band in the medium and high frequency band is almost the same frequency as the Bluetooth band. And because the antenna radiation efficiency is the highest at the gap position, coupling the third antenna ANT3 at the first gap position of the fourth antenna ANT4 can form a choke on the induced current in the Bluetooth band better than other positions on the frame, achieving a better stopband effect. Of course, those skilled in the art can understand that coupling the third antenna ANT3 at other positions on the frame can also achieve the stopband effect on the Bluetooth band, not limited to Figure 3 the exemplary position.

[0075] In some embodiments, the antenna type of the third antenna can be, for example, an IFA antenna or a Loop antenna, and the present disclosure does not limit this. Taking the IFA antenna as an example, as Figure 4 shown, the third antenna ANT3 includes a first radiation branch 101. By feeding and grounding the first radiation branch 101 and adjusting the appropriate length of the first radiation branch 101 and the related matching circuit, the third antenna can be configured to have an operating frequency band including the Bluetooth band, that is, the center frequency of the resonant frequency band is about 2.4 GHz.

[0076] In some embodiments of the present disclosure, to improve the coupling effect between the third antenna ANT3 and the metal frame, the length direction of the first radiation branch 101 can be set parallel to the long side direction of the metal frame. For example Figure 3 in the example, the first radiation branch 101 of the third antenna ANT3 is arranged parallel to the second long side and they are close to each other for coupling.

[0077] As Figure 4 shown, to further ensure the coupling effect of the third antenna ANT3, the feeding end K and the grounding end GND of the third antenna ANT3 can be arranged on the same side of the first radiation branch 101. For example, combined with Figure 3 and Figure 4 shown, the feeding end K and the grounding end GND of the third antenna ANT3 are both arranged close to the upper end of the first radiation branch 101.

[0078] In some embodiments, the distance between the feeding end K of the first radiation stub 101 and the second slot may be set to be less than the distance between the grounding end GND and the second slot. That is, the feeding end K is closer to the first slot than the grounding end GND, thereby further improving the choke effect of the third antenna ANT3 on the Bluetooth frequency band.

[0079] In the embodiments of the present disclosure, the length of the first radiation stub 101 may be 15 mm to 30 mm. Of course, those skilled in the art can understand that for the physical size of the first radiation stub 101 of the third antenna ANT3 and the coupling distance between the first radiation stub 101 and the frame, those skilled in the art can adjust according to the specific application scenario, as long as it is ensured that in the assembly environment, the third antenna ANT3 can generate a resonance mode that is the same frequency as the Bluetooth frequency band. The present disclosure does not limit this.

[0080] See Figure 3 As shown, in the exemplary embodiment, when the top first antenna ANT1 and the bottom second antenna ANT2 both operate in the Bluetooth frequency band, the resonance generated by the bottom independent Bluetooth will generate induced current on the frame and the body. When the induced current propagates upward along the right frame and reaches the position where the third antenna ANT3 is located, due to the coupling effect of the third antenna ANT3, a choke effect on the Bluetooth frequency band is formed at this position, preventing the induced current from continuing to propagate upward, so as not to affect the top first antenna ANT1, and improving the isolation degree of the two Bluetooth antennas.

[0081] As described above, in the embodiments of the present disclosure, the number of the third antennas is not limited to one, and the position of the third antennas is not limited to Figure 3 As shown, for example Figure 5 and Figure 6 respectively show the third antennas with different positions and numbers, which will be described separately below.

[0082] As Figure 5 shown, the third antenna ANT3 is close to the frame of the first long side for coupling. Specifically, the frame antenna system of the electronic device may further include a fifth antenna ANT5. The fifth antenna ANT5 may be a low-frequency (LB) antenna, and the fifth antenna ANT5 is disposed at a position on the first long side and close to the bottom short side, that is, at the lower left corner position of the metal frame.

[0083] The fifth antenna ANT5 is a low-frequency antenna, and its radiator length is generally long. Moreover, in the related art, the SAR value detection is generally compatible with the low-frequency antenna. Therefore, the third radiation stub 103 included in the fifth antenna ANT5 is generally a bent L-shaped floating stub, that is, there is no rigid structure connection between the third radiation stub 103 and the bearing part 120. Those skilled in the art can understand this, and the present disclosure will not elaborate.

[0084] The fifth antenna ANT5 further includes a second parasitic branch 202 coupled to the third radiation branch 103 through a second slot, so that the third antenna ANT3 can also be disposed near the position of the second slot.

[0085] Both the third radiation branch 103 and the second parasitic branch 202 are radiators formed by opening a slit in the metal frame. The third radiation branch 103 is coupled to the second parasitic branch 202 through the second slot. After feeding the third radiation branch 103, the second parasitic branch 202 on the opposite side can be used as an antenna parasitic structure.

[0086] When the fifth antenna ANT5 operates in the low-frequency band, the second parasitic branch 202 will induce a resonance mode with a frequency of 2.4 GHz similar to the Bluetooth band. Therefore, when the decoupling antenna ANT0 is disposed at the position of the second slot, it can also form a choke on the induced current in the Bluetooth band, achieving a better stopband effect.

[0087] For example Figure 5 In the example, when both the top first antenna ANT1 and the bottom second antenna ANT2 operate in the Bluetooth band, the resonance generated by the bottom independent Bluetooth will generate an induced current on the frame and the body. When the induced current propagates upward along the left frame and reaches the position of the third antenna ANT3, due to the coupling effect of the third antenna ANT3, a choke effect on the Bluetooth band is formed at this position, preventing the induced current from continuing to propagate upward, so as not to affect the top first antenna ANT1, and improving the isolation between the two Bluetooth antennas.

[0088] For the structure and principle of the third antenna ANT3, refer to the foregoing Figure 3 and Figure 4 embodiment, and the present disclosure will not elaborate herein.

[0089] As Figure 6 shown, a third antenna can also be provided on each of the first long side and the second long side, for example Figure 6 In an embodiment, the third antenna ANT31 can be provided at the position of the fourth antenna ANT4, and at the same time, the third antenna ANT32 can be provided at the position of the fifth antenna ANT5. The structures and principles of the third antenna ANT31 and the third antenna ANT32 are the same as those of the foregoing Figure 3 and Figure 5 embodiment.

[0090] For example Figure 6In an embodiment, when the top first antenna ANT1 and the bottom second antenna ANT2 both operate in the Bluetooth band, the resonance generated by the bottom independent Bluetooth will generate an induced current on the frame and the body. When the induced current propagates upward along the right frame and reaches the position of the third antenna ANT31, due to the coupling effect of the third antenna ANT31, a choke effect on the Bluetooth band is formed at this position, preventing the induced current from continuing to propagate upward. Similarly, when the induced current propagates upward along the left frame and reaches the position of the third antenna ANT32, due to the coupling effect of the third antenna ANT32, a choke effect on the Bluetooth band is formed at this position, preventing the induced current from continuing to propagate upward. Thus, the bottom independent Bluetooth antenna (ANT2) will not affect the top Bluetooth / WiFi antenna (ANT1), improving the isolation between the two Bluetooth antennas.

[0091] Through simulation tests, for the antenna system of the present disclosure embodiment, the isolation between the first antenna ANT1 and the second antenna ANT2 in the Bluetooth band can reach more than -35 dB, fully meeting the working requirements.

[0092] In some embodiments, the operating band of the second antenna ANT2 may further include the medium-high frequency (MHB) band in addition to the Bluetooth band, that is, the original medium-high frequency antenna can be used to be compatible with the independent Bluetooth antenna, so that the design of the independent Bluetooth antenna can be realized without changing the frame structure.

[0093] As can be seen from the above, in the present disclosure embodiment, by using the coupling between the third antenna and the metal frame, when the induced current in the Bluetooth band propagates along the metal frame, a choke effect is formed at the coupling position of the third antenna, thereby improving the isolation between the independent Bluetooth antenna and the traditional Bluetooth / WiFi antenna, realizing the highly available coexistence of the independent Bluetooth and the Bluetooth / WiFi antenna. Moreover, due to the addition of the independent Bluetooth antenna, the Bluetooth performance of the electronic device can be effectively improved, and the Bluetooth transmission rate and stability can be increased.

[0094] In a second aspect, the present disclosure embodiment provides an electronic device, which includes the antenna system described in any of the above embodiments. In some embodiments, the electronic device of the present disclosure can be any suitable device type, such as a smart phone, a personal digital assistant, a wearable device, etc., and the present disclosure does not limit this.

[0095] In some embodiments, the electronic device includes a housing, and the housing includes a frame, where the frame refers to the external structure on the sides of the electronic device. In the embodiments of the present disclosure, the first antenna ANT1, the second antenna ANT2, the fourth antenna ANT4, and the fifth antenna ANT5 in the above antenna system can be formed by the frame of the electronic device, that is, a part of the frame of the electronic device is used as each radiation branch. Those skilled in the art can understand this and will not be elaborated here.

[0096] In some embodiments, the first radiation branch of the third antenna can be disposed inside the electronic device through an FPC (Flexible Printed Circuit) or an LDS (Laser-Direct-structuring) process. The present disclosure does not limit this.

[0097] Figure 7 shows a block diagram of an electronic device in some embodiments of the present disclosure. The following will be described in conjunction with Figure 7 the electronic device in some embodiments of the present disclosure.

[0098] Refer to Figure 7 , the electronic device 1800 may include one or more of the following components: a processing component 1802, a memory 1804, a power supply component 1806, a multimedia component 1808, an audio component 1810, an input / output (I / O) interface 1812, a sensor component 1816, and a communication component 1818.

[0099] The processing component 1802 generally controls the overall operation of the electronic device 1800, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 1802 may include one or more processors 1820 to execute instructions. In addition, the processing component 1802 may include one or more modules to facilitate the interaction between the processing component 1802 and other components. For example, the processing component 1802 may include a multimedia module to facilitate the interaction between the multimedia component 1808 and the processing component 1802. Also, for example, the processing component 1802 may read executable instructions from the memory to implement functions related to the electronic device.

[0100] The memory 1804 is configured to store various types of data to support the operation of the electronic device 1800. Examples of such data include instructions for any application or method operating on the electronic device 1800, contact data, phone book data, messages, pictures, videos, and the like. The memory 1804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0101] The power supply component 1806 provides power to various components of the electronic device 1800. The power supply component 1806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 1800.

[0102] The multimedia component 1808 includes a display screen that provides an output interface between the electronic device 1800 and the user. In some embodiments, the multimedia component 1808 includes a front camera and / or a rear camera. When the electronic device 1800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0103] The audio component 1810 is configured to output and / or input audio signals. For example, the audio component 1810 includes a microphone (MIC) that is configured to receive external audio signals when the electronic device 1800 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 1804 or transmitted via the communication component 1818. In some embodiments, the audio component 1810 further includes a speaker for outputting audio signals.

[0104] The I / O interface 1812 provides an interface between the processing component 1802 and a peripheral interface module, and the peripheral interface module can be a keyboard, a click wheel, buttons, and the like. These buttons can include, but are not limited to: a home button, a volume button, a start button, and a lock button.

[0105] The sensor assembly 1816 includes one or more sensors for providing an assessment of various aspects of the electronic device 1800. For example, the sensor assembly 1816 can detect the on / off state of the electronic device 1800, the relative positioning of components, such as the display and keypad of the electronic device 1800. The sensor assembly 1816 can also detect a change in the position of the electronic device 1800 or a component of the electronic device 1800, the presence or absence of user contact with the electronic device 180, the orientation or acceleration / deceleration of the electronic device 1800, and a change in the temperature of the electronic device 1800. The sensor assembly 1816 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 1816 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1816 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0106] The communication component 1818 is configured to facilitate communication between the electronic device 1800 and other devices in a wired or wireless manner. The electronic device 1800 can access a wireless network based on communication standards, such as Wi-Fi, 2G, 3G, 4G, 5G, or 6G, or a combination thereof. In an exemplary embodiment, the communication component 1818 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1818 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0107] In an exemplary embodiment, the electronic device 1800 can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0108] Obviously, the above-described embodiments are merely examples for clear illustration and are not limitations on the embodiments. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the embodiments here. The obvious changes or modifications derived therefrom are still within the protection scope of the present disclosure.

Claims

1. An antenna system, characterized in that, the antenna system includes a first antenna and a second antenna which are arranged relatively far away on the frame of the electronic device, and the first antenna and the second antenna are configured to have a working frequency band including at least the Bluetooth frequency band; it further includes at least one third antenna, the third antenna is located on the conduction path of the first antenna and the second antenna, and the third antenna is configured to generate a resonance mode including the Bluetooth frequency band.

2. The antenna system according to claim 1, characterized in that, the third antenna is closely coupled to the frame of the electronic device, and the coupling frequency band between the third antenna and the frame of the electronic device includes the Bluetooth frequency band.

3. The antenna system according to claim 1 or 2, characterized in that, the frame is enclosed by two parallel short sides and two parallel long sides, the first antenna is arranged on the top short side of the electronic device or at a position on any long side close to the top short side, and the second antenna is arranged on the bottom short side of the electronic device or at a position on any long side close to the bottom short side.

4. The antenna system according to claim 3, characterized in that, the third antenna includes a first radiation branch, the length direction of the first radiation branch is parallel to the long side, and the first radiation branch is closely coupled to at least one of the first long side and the second long side.

5. The antenna system according to claim 3, characterized in that, it further includes a fourth antenna, the fourth antenna is arranged on the second long side and close to the top short side, and the fourth antenna is configured to have a working frequency band including the medium and high frequency bands; the fourth antenna includes a second radiation branch formed by a part of the frame of the second long side, and a first parasitic branch coupled to the second radiation branch through a first gap, and the third antenna is arranged close to the position of the first gap.

6. The antenna system according to claim 5, characterized in that, the third antenna further includes a feeding end for feeding the first radiation branch and a grounding end for grounding the first radiation branch, the feeding end and the grounding end are both arranged close to one side of the length direction of the first radiation branch, and the distance between the feeding end and the first gap is less than the distance between the grounding end and the second gap.

7. The antenna system according to claim 3, characterized in that, it further includes a fifth antenna, the fifth antenna is arranged on the first long side and close to the bottom short side, and the fifth antenna is configured to have a working frequency band including the low frequency band; the fifth antenna includes a third radiation branch formed by a part of the frame of the bottom short side and a part of the frame of the first long side, and a second parasitic branch coupled to the third radiation branch through a second gap, and the third antenna is arranged close to the position of the second gap.

8. The antenna system according to claim 1, characterized in that, the third antenna includes an LDS antenna or an FPC antenna.

9. The antenna system according to claim 1, characterized in that, the first antenna is configured to have a working frequency band including the Bluetooth frequency band and the WiFi frequency band; The second antenna is configured such that the operating frequency band includes a medium-high frequency band and the Bluetooth frequency band.

10. An electronic device, characterized in that, An antenna system according to any one of claims 1 to 9 is included.

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