Antenna system and electronic equipment

Abstract

The invention relates to the technical field of wireless communication, and provides an antenna system and electronic equipment, the antenna system comprises a first antenna and a second antenna, a first parasitic branch is arranged between the first antenna and the second antenna and is coupled with the first antenna and the second antenna, and at least one tuning branch of a tuning switch is connected with the first parasitic branch. And other tuning branches are connected with the first antenna or the second antenna. According to the antenna system and the electronic equipment provided by the embodiment of the invention, the first parasitic branch at the bottom data interface position of the electronic equipment is suspended, so that the first parasitic branch can be used as a parasitic structure of a bottom frame antenna, and the state of the first parasitic branch is tuned by using the tuning switch to realize cross intermodulation of the bottom antenna; therefore, the antenna performance of the bottom antenna is improved, and the efficiency of the whole antenna is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technologies, and particularly relates 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. Especially for relatively high-end flagship mobile phone products, it is almost necessary to cover various antenna frequency bands such as 2G, 3G, 4G, 5G, Bluetooth, WiFi, and satellite positioning. However, in the compact space of a mobile phone, it is difficult to ensure the isolation between antennas, resulting in difficulty in improving the antenna performance. Summary of the Invention

[0003] To improve the antenna performance of mobile terminals, embodiments of the present disclosure provide an antenna system and an electronic device.

[0004] In a first aspect, embodiments of the present disclosure provide an antenna system, including:

[0005] A first antenna and a second antenna disposed on the frame of the electronic device;

[0006] A first parasitic stub, the first parasitic stub is disposed between the first antenna and the second antenna, and is coupled to the first antenna and the second antenna through gaps respectively, and the first parasitic stub is grounded through a non-rigid structure;

[0007] At least one tuning switch, the tuning switch includes a plurality of tuning branches, and at least one of the plurality of tuning branches is connected to the first parasitic stub, and the other tuning branches are connected to the first antenna or the second antenna.

[0008] In some embodiments, the at least one tuning switch includes a first tuning switch, and at least one tuning branch of the first tuning switch is connected to the first parasitic stub, and the other tuning branches are connected to the first antenna.

[0009] In some embodiments, the at least one tuning switch includes a second tuning switch, and at least one tuning branch of the second tuning switch is connected to the first parasitic stub, and the other tuning branches are connected to the second antenna.

[0010] In some embodiments, the first antenna includes a first radiation stub and a first feed, and the first feed excites the first radiation stub to generate a resonance mode including a first frequency band, wherein the first radiation stub is grounded through a non-rigid structure.

[0011] In some embodiments, the first antenna further includes a second parasitic stub. One end of the first radiating stub is coupled to the first parasitic stub, and the other end is coupled to the second parasitic stub. The length of the second parasitic stub is 13 mm to 20 mm.

[0012] In some embodiments, the second antenna includes a second radiating stub and a second feed. The second feed excites the second radiating stub to generate a resonance mode including a second frequency band and / or a third frequency band.

[0013] In some embodiments, the first parasitic stub is connected to an SAR detection circuit.

[0014] In some embodiments, a third antenna is further included. The third antenna is disposed on the electronic device away from the second antenna. The third antenna is configured to have a working frequency band including a Bluetooth frequency band and a WiFi frequency band.

[0015] In some embodiments, a fourth antenna is further included. The fourth antenna is disposed on the frame of the electronic device near the second antenna. The fourth antenna is configured to have a working frequency band including a low-frequency band and a part of a medium-high frequency band.

[0016] In a second aspect, embodiments of the present disclosure provide an electronic device, including:

[0017] The antenna system according to any one of the embodiments of the first aspect.

[0018] In some embodiments, the electronic device further includes a data interface, and the data interface is disposed at the position of the first parasitic stub.

[0019] The antenna system of the embodiments of the present disclosure includes a first antenna and a second antenna disposed on the frame of the electronic device. A first parasitic stub is disposed between the first antenna and the second antenna and is coupled to the first antenna and the second antenna through slots respectively. The first parasitic stub is grounded through a non-rigid structure. The tuning switch includes a plurality of tuning branches, and at least one of the plurality of tuning branches is connected to the first parasitic stub. In the embodiments of the present disclosure, by suspending the first parasitic stub at the position of the data interface at the bottom of the electronic device, the first parasitic stub can be used as a parasitic structure of the bottom frame antenna, and the state of the first parasitic stub is tuned by using the tuning switch to achieve the intermodulation of the bottom antenna, thereby improving the natural performance of the bottom antenna and increasing the antenna efficiency of the whole machine. Description of the Drawings

[0020] 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 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, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of an electronic device according to some embodiments of the present disclosure.

[0022] Figure 2 It is a schematic structural diagram of an antenna system according to some embodiments of the present disclosure.

[0023] Figure 3 It is a schematic structural diagram of an antenna system according to some embodiments of the present disclosure.

[0024] Figure 4 It is a schematic structural diagram of an antenna system according to some embodiments of the present disclosure.

[0025] Figure 5 It is a block diagram of the structure of an electronic device according to some embodiments of the present disclosure. Specific Embodiments

[0026] The following will clearly and completely describe the technical solutions of the present disclosure in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present disclosure, rather than all embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection 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.

[0027] With the development of wireless communication technology, the communication frequency bands that mobile terminals need to support are constantly increasing. Especially for relatively high-end flagship mobile phone products, almost all antenna frequency bands such as 2G, 3G, 4G, 5G, Bluetooth, WiFi, and satellite positioning need to be covered. Therefore, the number of antennas included in the terminal is also increasing, which poses a great challenge to the antenna design of mobile terminals.

[0028] Taking a smartphone as an example, in the related art, generally, slits are formed in the metal frame of the mobile phone to form each antenna radiator. At the same time, the antenna radiator also serves as the outer side frame of the mobile phone. Therefore, there are many limitations on the antenna design of smartphones. For example, the clearance environment of smartphones is limited, and the antenna layout is crowded. Another example is that smartphones have high appearance requirements, the slit structure is symmetric and beautiful, and the number of slits is as small as possible. For another example, smartphones require a large number of communication frequency bands and have high radiation performance requirements. Still another example is that the SAR (Specific Absorption Ratio) value of smartphones is strictly required; and so on. These factors limit the antenna performance of mobile phones and it is difficult to further improve the antenna performance.

[0029] Therefore, in order to improve the antenna performance of multi-band antennas in a compact space, the embodiments of the present disclosure provide an antenna system and an electronic device having the antenna system.

[0030] In a first aspect, the embodiments of the present disclosure provide an antenna system. The antenna system 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 smartphone, a handheld computer, a wearable device, etc. The present disclosure does not limit this.

[0031] In some embodiments, taking a smartphone as an example, 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 a main board, a sensor, a display module, and a back plate. On the other hand, the edge of the carrier frame serves as the metal frame of the mobile phone. Currently, the antennas of smartphones generally use slits formed in the metal frame to form antenna radiators. At the same time, the antenna radiator also serves as the outer side frame of the mobile phone.

[0032] For example Figure 1 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 plate 300. The frame body 100 serves as the main body support structure of the mobile phone, and various electrical and structural components 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 plate 300 to form the back of the mobile phone.

[0033] The frame body 100 includes a bearing portion 120 and a frame 110 formed around the edge of the bearing portion 120. After the screen assembly 200 and the back plate 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 forming slits in the frame 110 and connecting corresponding radio frequency circuits, signal communication of various frequency bands of the mobile phone can be realized.

[0034] Of course, other various electrical structures may also be included in the smart phone, which are not shown in the embodiments of the present disclosure. For example, a circuit board, various sensors, a battery, etc. are usually disposed between the carrying portion 120 of the housing 100 and the back plate 300. Those skilled in the art can understand this, and the present disclosure will not elaborate further. Figure 1 For ease of understanding and explanation, the frequency bands included in the antenna field for low frequency (LB), medium-high frequency (MHB), and high frequency (HB) are described below.

[0035] 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 N28 band of the 5G standard.

[0036] 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 N1, N3, N7, N38, N41 bands of the 5G standard.

[0037] 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.

[0038] It can be understood that the low frequency band described in the following text of the present disclosure includes at least one of the above-mentioned LB bands, the medium-high frequency band includes at least one of the above-mentioned MHB bands, and the high frequency band includes at least one of the above-mentioned HB bands. Unless otherwise specified, the present disclosure will not elaborate further.

[0039]

[0040] Figure 2 ​The structural schematic diagram of the frame antenna system of a mobile terminal in the related art is shown. Only some antennas in the antenna system are shown in the figure, rather than all antennas, 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, but those skilled in the art can undoubtedly understand and fully implement it with reference to the related art, and the present disclosure will not elaborate on this anymore.

[0041] In Figure 2 the example, the antenna ANT1 is generally a low-frequency (LB) antenna, and the antenna ANT2 is a medium-high-frequency (MHB) antenna. The radiators of the low-frequency antenna ANT1 and the medium-high-frequency antenna ANT2 are generally formed by opening a slit in the metal frame at the bottom of the mobile phone. Moreover, the radiator length of the low-frequency antenna ANT1 is generally longer. In addition, in the related art, the low-frequency antenna is generally used to be compatible with SAR value detection. Therefore, the radiation branches of the low-frequency antenna ANT1 are generally bent L-shaped suspended branches.

[0042] At the bottom of the mobile phone, between the low-frequency antenna ANT1 and the medium-high-frequency antenna ANT2 is the charging port frame of the mobile phone. At the position of the charging port frame, holes need to be opened on the frame to accommodate the charging interface of the mobile phone. The charging interface can generally be, for example, a Micro USB or a Type C interface, etc. The charging port frame is generally directly connected to the metal bearing part 120 through a rigid rib position. That is, for the antenna system, the charging port frame is a metal branch with a rigid direct ground return, and it cannot affect the antenna performance of the low-frequency antenna ANT1 and the medium-high-frequency antenna ANT2 on both sides itself.

[0043] In the embodiment of the present disclosure, in order to improve the antenna performance at the bottom of the device and integrate more antenna frequency bands at the bottom of the device, the charging port frame can be suspended and connected across the charging port frame through a tuning switch, so that the charging port frame forms a parasitic branch of the antenna, thereby improving the bottom antenna performance. The structure and principle of the antenna system in the embodiment of the present disclosure will be described below.

[0044] 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 based on the frame of the smart phone.

[0045] For ease of understanding and description below, in combination with Figure 2 as shown, the frame of the smart phone is roughly a rectangular (or rounded rectangle) structure, and its frame is enclosed by two parallel short sides and two parallel long sides. In the embodiment 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 in the embodiment of the present disclosure will be described below in combination with Figure 3 to illustrate.

[0046] As Figure 3 shown, in some embodiments, the antenna system of the present disclosure example includes a first antenna ANT1, a second antenna ANT2, and a first parasitic stub 201.

[0047] The first antenna ANT1 is configured such that its operating frequency band at least includes a first frequency band. For example, the first frequency band can be a low - frequency (LB) band, that is, the first antenna ANT1 is a low - frequency antenna. The second antenna ANT2 is configured such that its operating frequency band at least includes a second frequency band. For example, the second frequency band can be a medium - high - frequency (MHB) band, that is, the second antenna ANT1 is a medium - high - frequency antenna. 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 break in the metal frame of the electronic device, and the corresponding resonant frequency is achieved by feeding and grounding the radiator.

[0048] In the embodiments of the present disclosure, the first antenna ANT1 is disposed at a position on the first long side and near the bottom short side, that is, at the lower - left corner position of the metal frame. The first antenna ANT1 includes a first radiating stub 101. Since the radiator length of a low - frequency antenna is generally long, and it is often necessary to use the low - frequency antenna to be compatible with the SAR detection at the bottom of the mobile phone, the first radiating stub 101 of the first antenna ANT1 is a bent L - shaped floating stub, that is, there is no rigid - structure connection between the first radiating stub 101 and the metal supporting part 120. Those skilled in the art can understand this, and the present disclosure will not elaborate further.

[0049] It should be noted that in some embodiments of the present disclosure, the operating frequency band of the first antenna ANT1 includes the LB band. At the same time, the first antenna ANT1 can also be further compatible with some frequency bands of medium - high - frequency (MHB) and high - frequency (HB). For example, in one example, the operating frequency band of the first antenna ANT1 can include the low - frequency band (LB), N41, and N78 bands. Those skilled in the art can understand this, and the present disclosure will not elaborate further.

[0050] Continuing to refer to Figure 3 shown, the first radiating stub 101 is formed by a part of the frame on the bottom short side and a part of the frame on the first long side. On the bottom short side, the first radiating stub 101 is coupled to the first parasitic stub 201 through a gap. For example, the first radiating stub 101 and the first parasitic stub 201 can be formed by opening a break in the frame on the bottom short side. On the first long side, the first radiating stub 101 is coupled to the second parasitic stub 202 through a gap. For example, the first radiating stub 101 and the second parasitic stub 202 can be formed by opening a break in the frame on the first long side.

[0051] One end of the second parasitic stub 202 is coupled to the first radiating stub 101, and the other end is grounded through a rigid structure, that is, connected to the carrier part 120 through a ground return rib position to achieve grounding.

[0052] Different from the related art, in the embodiment of the present disclosure, the first parasitic stub 201 is a floating stub, that is, there is no rigid structure connection between the first parasitic stub 201 and the metal carrier part 120, so that the first parasitic stub 201 is a floating structure relative to the metal body of the machine.

[0053] Taking a smart phone as an example of the electronic device, the position of the first parasitic stub 201 can be used to set the data interface of the mobile phone by means of a cut-out, and the first parasitic stub 201 is the floating frame at the position of the mobile phone data interface.

[0054] See Figure 3 As shown, the first antenna ANT1 includes a first feed K1, the first feed K1 is electrically connected to the first radiating stub 101, and the electrical connection point of the first feed K1 on the first radiating stub 101 is the feed point of the first antenna, also called feeding. The second antenna ANT2 includes a second feed K2, the second feed K2 is electrically connected to the second radiating stub of the second antenna ANT2, and the electrical connection point of the second feed K2 on the second antenna ANT2 is the feed point of the second antenna ANT2.

[0055] It can be understood that the first feed K1 and the second feed K2 are connected to the radio frequency circuit of the electronic device, and the radio frequency circuit is, for example, a radio frequency chip, etc. Thus, the first feed K1 and the second feed K2 can be used as radio frequency excitation sources to realize the transceiver of radio frequency signals in corresponding frequency bands by feeding the antenna radiating stubs. Those skilled in the art can understand this, and the present disclosure will not elaborate further.

[0056] In the embodiment of the present disclosure, the first parasitic stub 201 is respectively coupled to the first antenna ANT1 and the second antenna ANT2. Since the first parasitic stub 201 is a floating structure, when the first antenna ANT1 or the second antenna ANT2 is working, due to the coupling effect, the resonant signal generated by the first antenna ANT1 or the second antenna ANT2 will generate an induced current on the first parasitic stub 201, thereby affecting the radiation performance of the first antenna ANT1 or the second antenna ANT2.

[0057] In other words, in the embodiments of the present disclosure, after the first parasitic stub 201 that was originally rigidly grounded is set to a floating structure, the first parasitic stub 201 forms a parasitic structure of the first antenna ANT1 and the second antenna ANT2 and participates in the resonance modes of the first antenna ANT1 and the second antenna ANT2. Therefore, in the embodiments of the present disclosure, a tuning switch can be used to adjust the state of the first parasitic stub 201, thereby improving the antenna performance of the coupled first antenna ANT1 and second antenna ANT2 and achieving cross-intermodulation of the radiation performance of the first antenna ANT1 and the second antenna ANT2.

[0058] In some embodiments of the present disclosure, the antenna system further includes at least one tuning switch. In a conventional antenna system, the function of a tuning switch is generally to switch the operating frequency band of the antenna by matching different tuning branches. For example, taking a mid-high frequency antenna system as an example, by switching the tuning switch, the operating frequency band of the mid-high frequency antenna can be switched between multiple frequency bands such as B40, B41, and N41. Therefore, a tuning switch generally needs to include at least two tuning branches, and a tuning device is provided on each tuning branch. The tuning device can be, for example, a capacitor and / or an inductor.

[0059] In the embodiments of the present disclosure, the number of tuning switches can be at least one. For example Figure 3 as shown, there are a total of two tuning switches, namely the first tuning switch SW1 and the second tuning switch SW2. Of course, those skilled in the art can understand that in other embodiments, the antenna system can include only the first tuning switch SW1 or only the second tuning switch SW2, and the present disclosure does not limit this.

[0060] The tuning switch includes multiple tuning branches. In the embodiments of the present disclosure, at least one tuning branch of the tuning switch is connected to the first parasitic stub 201, and the remaining tuning branches are connected to the first antenna ANT1 or the second antenna ANT2.

[0061] For example, taking the first tuning switch SW1 as an example, among the multiple tuning branches included in the first tuning switch SW1, at least one tuning branch is connected to the first parasitic stub 201, and the remaining tuning branches are connected to the first antenna ANT1. Similarly, taking the second tuning switch SW2 as an example, among the multiple tuning branches included in the second tuning switch SW2, at least one tuning branch is connected to the first parasitic stub 201, and the remaining tuning branches are connected to the second antenna ANT2.

[0062] The purpose of setting at least one tuning branch of the tuning switch to be connected to the first parasitic stub 201 is to be able to adjust the state of the first parasitic stub 201, thereby affecting the radiation performance of the antenna coupled thereto.

[0063] For example, for the second antenna ANT2, the suspended first parasitic stub 201 and the first antenna ANT1 are the body structures. Therefore, by adjusting the state of the first tuning switch SW1 to adjust the first parasitic stub 201, a part of the radiation energy of the second antenna ANT2 can be coupled to the first parasitic stub 201, and then coupled to the first antenna ANT1. When the induced currents are in the same direction, the antenna performance of the second antenna ANT2 can be improved.

[0064] Similarly, for the first antenna ANT1, the suspended first parasitic stub 201 and the second antenna ANT2 are the body structures. Therefore, by adjusting the state of the first parasitic stub 201 by adjusting the second tuning switch SW2, a part of the radiation energy of the first antenna ANT1 can be coupled to the first parasitic stub 201, and then coupled to the second antenna ANT2. When the induced currents are in the same direction, the antenna performance of the first antenna ANT1 can be improved.

[0065] From the above principle, it can be known that in the embodiment of the present disclosure, by suspending the first parasitic stub 201 that was originally grounded by the rigid rib position, the first parasitic stub 201 can be used as the parasitic structure of the first antenna ANT1 and the second antenna ANT2. Therefore, the performance improvement of the second antenna ANT2 can be realized by using the first tuning switch SW1 provided on the first antenna ANT1, and the performance improvement of the first antenna ANT1 can be realized by using the second tuning switch SW2 provided on the second antenna ANT2, realizing the performance cross-intermodulation between the first antenna ANT1 and the second antenna ANT2, thereby improving the antenna performance.

[0066] It should be noted that as described above, in the embodiment of the present disclosure, it is not limited that the first tuning switch SW1 and the second tuning switch SW2 must be set at the same time. Theoretically, as long as one of the first tuning switch SW1 and the second tuning switch SW2 exists, the performance improvement of the opposite-side antenna can be realized, which can be understood by those skilled in the art, and the present disclosure will not elaborate.

[0067] In some embodiments, the tuning switch SW may be a switching circuit including multiple tuning branches. For example, the tuning switch SW may be a multi-way SPST (single-pole single-throw) switch, which includes multiple tuning branches, and a tuning device is provided on each tuning branch. The tuning device may be, for example, a capacitor and / or an inductor, etc. The tuning switch SW can control the on / off of each branch, and the combined conduction of the tuning devices on any branch can be realized through the tuning devices, thereby realizing frequency band switching and fine-tuning of the frequency.

[0068] For example Figure 4In the example, the first tuning switch SW1 includes 4 parallel tuning branches, and each tuning branch is provided with a tuning device (inductor or capacitor) and an SPST switch. Among them, the first 3 tuning branches are connected to the first antenna ANT1, and the 4th tuning branch is connected to the first parasitic stub 201. The second tuning switch SW3 also includes 4 parallel tuning branches, and each tuning branch is provided with a tuning device (inductor or capacitor) and an SPST switch. Among them, the first 2 tuning branches are connected to the first parasitic stub 201, and the last two tuning branches are connected to the second antenna ANT2.

[0069] By controlling the on / off states of the respective tuning branches through the tuning switch, the impedance matching of the antenna can be achieved. Thus, on the one hand, the switching of the antenna operating frequency band can be realized, and on the other hand, the antenna performance of the opposite-side antenna can be improved by adjusting the state of the first parasitic stub 201.

[0070] For example, taking the first tuning switch SW1 as an example, the antenna frequency bands corresponding to the switch states of the first tuning switch SW1 can be as shown in Table 1 below:

[0071] Table 1

[0072] Antenna frequency band Switch state Matching value B28 All off 0nH B8 RF1 11nH B5 RF2 18nH B20 RF3 48nH

[0073] In the example of Table 1, the antenna frequency band represents the operating frequency band included in the low-frequency antenna (i.e., the first antenna ANT1). The switch state represents the state of the branch switch of the tuning branch of the first tuning switch SW1. Combining Figure 4 As shown, All off means that all 4 tuning branches are disconnected. At this time, the impedance matching value is 0 nH, and the antenna operates in the B28 frequency band; RF1 means that the first tuning branch is closed and the remaining tuning branches are disconnected. At this time, the impedance matching value is 11 nH, and the antenna operates in the B8 frequency band, and so on.

[0074] Of course, those skilled in the art can understand that the number of tuning branches and the circuit structure of the first tuning switch SW1 and the second tuning switch SW2 are not limited to Figure 4 As shown, and the switching states of the first tuning switch SW1 and the second tuning switch SW2 are not limited to those shown in Table 1 above. Those skilled in the art can undoubtedly implement other suitable implementation manners on the basis of the above, and the present disclosure will not elaborate on this.

[0075] As can be seen from the above, in the embodiment of the present disclosure, by floatingly arranging the first parasitic stub at the position of the bottom data interface of the electronic device, the first parasitic stub can be used as the parasitic structure of the bottom frame antenna, and the state of the first parasitic stub is tuned by using the tuning switch to achieve the cross-intermodulation of the bottom antenna, thereby improving the antenna performance of the bottom antenna and increasing the overall antenna efficiency of the machine.

[0076] The SAR (Specific Absorption Rate) index is used to measure the electromagnetic energy absorbed and consumed by the human body in an electromagnetic exposure environment. If the SAR index of an antenna is too high, it may be harmful to the human body. Therefore, countries have strict regulations on the SAR performance of electronic devices. If the regulations are exceeded, the electronic device will not be able to be sold, and there may even be risks such as fines and delisting. Thus, the SAR detection of antennas in electronic devices is particularly important.

[0077] In related technologies, for SAR detection, generally, a suspended radiator stub is used as an equivalent capacitor for detection. For example Figure 2 In the example, generally, a suspended low-frequency antenna ANT1 is used to be compatible with SAR detection. However, due to the relatively long length of the radiation stub of the low-frequency antenna ANT1, ESD (Electro-Static discharge) problems are likely to occur, which affect the antenna performance. Moreover, SAR detection itself will also cause energy loss of the low-frequency antenna ANT1, resulting in a reduction in low-frequency performance.

[0078] Therefore, in the embodiments of the present disclosure, by setting the first parasitic stub 201 as a suspended structure, the first parasitic stub 201 can be used to be compatible with SAR detection, and there is no need to be compatible with SAR detection on the low-frequency antenna.

[0079] For example Figure 3 As shown, in some embodiments, the first parasitic stub 201 is connected to the SAR detection circuit, so as to use the suspended first parasitic stub 201 to be compatible with the SAR detection function at the bottom of the electronic device. On the one hand, since the length of the first parasitic stub 201 is relatively short, the ESD problem is not obvious, and the ESD problem can be effectively eliminated or alleviated, improving the performance of the bottom antenna. On the other hand, since there is no need to be compatible with SAR detection on the first antenna ANT1, the energy loss caused by SAR detection is eliminated, effectively improving the low-frequency performance of the first antenna ANT1. Through simulation tests, the performance of the first antenna ANT1 can be improved by about 0.2 dB to 0.5 dB.

[0080] 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 of the same frequency, in the limited space of a mobile phone, the Bluetooth frequency band and the WiFi 2.4G frequency band are often designed to share the same antenna, resulting in the Bluetooth performance being difficult to reach the best. In scenarios with a poor anechoic environment, problems such as slow Bluetooth data transmission rate and packet loss often occur.

[0081] Independent Bluetooth, as the name implies, refers to a solution that is different from the conventional one that shares the same antenna with WiFi. Independent Bluetooth can be used only for the Bluetooth frequency band, thus effectively improving the user experience in Bluetooth scenarios and greatly enhancing the experience in scenarios such as Bluetooth wireless headphones and Bluetooth file transfer.

[0082] 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.

[0083] In Figure 2 the example, antenna ANT3 is generally used as the conventional Bluetooth / WiFi antenna. Since the Bluetooth frequency band and the WiFi frequency band share the same antenna, the Bluetooth performance is poor.

[0084] 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.

[0085] 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 ANT3 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 ANT3 will deteriorate to about -17 dB, and the isolation cannot meet the usage requirements.

[0086] It can be seen that simply increasing the number of antennas conventionally cannot meet the performance requirements of independent Bluetooth and Bluetooth / WiFi antennas, and the coexistence of independent Bluetooth and conventional Bluetooth / WiFi antennas cannot be achieved.

[0087] In the embodiments of the present disclosure, as shown in combination with Figure 3 and Figure 4 the antenna system further includes a third antenna ANT3, and the third antenna ANT3 is configured to have a working frequency band including the Bluetooth frequency band and the WiFi frequency band, that is, the third antenna ANT3 is a Bluetooth / WiFi antenna.

[0088] In an embodiment of the present disclosure, an independent Bluetooth antenna may be disposed on the second antenna ANT2 at the bottom of the mobile terminal. The second antenna ANT2 is a medium-high frequency (MHB) band antenna, and B40 (with a frequency range of 2300 MHz to 2400 MHz) is an essential medium-high frequency band of the mobile terminal. The B40 band is the same frequency as Bluetooth 2.4 GHz. Therefore, by using the second antenna ANT2 to be compatible with the independent Bluetooth, the design of the independent Bluetooth antenna can be easily achieved without changing the frame structure.

[0089] The second antenna ANT2 is configured such that its operating frequency band includes a second band and a third band. In one example, the second band is a medium-high frequency band, and the third band is a Bluetooth band, that is, the second antenna ANT2 is a medium-high frequency antenna compatible with an independent Bluetooth.

[0090] In an embodiment of the present disclosure, the third antenna ANT3 and the second antenna ANT2 are arranged relatively far apart on the frame of the electronic device. For example Figure 3 In the example, the third antenna ANT3 is disposed on the short side at the top, the second antenna ANT2 is disposed on the short side at the bottom, and the third antenna ANT3 is close to the first long side, and the second antenna ANT2 is close to the second long side. That is, in the length direction of the electronic device, the third antenna ANT3 and the second antenna ANT2 are respectively disposed on the upper and lower sides, and in the width direction of the electronic device, the third antenna ANT3 and the second antenna ANT2 are respectively disposed on the left and right sides.

[0091] It can be understood that in Figure 3 the example, the third antenna ANT3 and the second antenna ANT2 are arranged diagonally, so that the third antenna ANT3 and the second antenna ANT2 are farthest apart in the physical space, thereby minimizing the influence of spatial propagation and improving the isolation degree between the two Bluetooth antennas.

[0092] However, as can be seen from the foregoing, simply increasing the spatial distance cannot make the isolation degree between the third antenna ANT3 and the second antenna ANT2 meet the requirements. Therefore, in the disclosed embodiment, it is necessary to use the second parasitic branch 202 of the first antenna ANT1 to form a choke effect on the Bluetooth 2.4 GHz band, eliminate or mitigate the propagation of the induced current on the metal frame, and improve the isolation degree between the third antenna ANT3 and the second antenna ANT2.

[0093] Such as Figure 3As shown, the length of the second parasitic stub 202 is L. Through research, it is found that changing the length L of the second parasitic stub 202 has little effect on the low-frequency performance of the first antenna ANT1. However, by setting the appropriate length L of the second parasitic stub 202, a resonant mode in the Bluetooth frequency band can be induced on the second parasitic stub 202. Thus, a stopband for the Bluetooth 2.4 GHz frequency band can be formed at the position of the second parasitic stub 202, realizing a choke effect on the induced current in the Bluetooth frequency band on the metal frame.

[0094] Combined with Figure 3 As shown, when both the top third antenna ANT3 and the bottom second antenna ANT2 operate in the Bluetooth frequency 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 second parasitic stub 202, the resonant mode of the Bluetooth frequency band induced by the second parasitic stub 202 will lock the induced current flowing through the Bluetooth frequency band in the resonant circuit, thus forming a choke effect on the Bluetooth frequency band, preventing the induced current from continuing to propagate upward, and thus not affecting the top third antenna ANT3, improving the isolation between the two Bluetooth antennas.

[0095] In some embodiments of the present disclosure, the length L of the second parasitic stub 202 can be selected by experimental debugging. For example, the real antenna environment can be simulated by simulation software, and by adjusting the length L of the second parasitic stub 202, the resonant mode on the second parasitic stub 202 can be adjusted until the resonant frequency is close to or equal to the Bluetooth frequency band (2.4 GHz frequency band), that is, the debugging of the second parasitic stub 202 is completed.

[0096] Taking the smartphone scenario as an example, in some embodiments, the length L of the second parasitic stub can be 13 mm to 20 mm. Within this length range, the second parasitic stub 202 has a better stopband effect on the Bluetooth frequency band, and can ensure the isolation requirement of -30 dB for the Bluetooth frequency band between the third antenna ANT3 and the second antenna ANT2.

[0097] In an exemplary embodiment, the length L of the second parasitic stub can be 18 mm, which can ensure that the isolation between the third antenna ANT3 and the second antenna ANT2 in the Bluetooth frequency band reaches more than -40 dB, fully meeting the antenna usage requirements.

[0098] In some embodiments, the first radiation stub 101 of the first antenna ANT1 can be set as a floating stub as described in the above embodiments, that is, there is no rigid structure ground connection between the first radiation stub 101 and the carrier part 120.

[0099] In some other embodiments, to ensure the structural strength, the first radiation stub 101 can also be grounded through a rigid rib position. However, to ensure that the induced current of the bottom independent Bluetooth antenna (i.e., the second antenna ANT2) can reach the second parasitic stub 202, the width of the rigid rib position where the first radiation stub 101 is grounded needs to be as small as possible. For example, in some embodiments, the width of the rigid rib position is less than 3 mm.

[0100] As can be seen from the above, in the embodiments of the present disclosure, by using the parasitic stub of the low-frequency antenna, when the induced current in the Bluetooth band propagates along the metal frame, a choke effect is formed at the position of the parasitic stub, 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 improved.

[0101] See Figure 4 As shown, in some embodiments of the present disclosure, the frequency bands of the antenna system at the bottom of the electronic device can include the LB band, N41 band, N78 band generated by the first antenna ANT1, and the MHB band and Bluetooth band generated by the second antenna ANT2. On this basis, in order to integrate more antenna frequency bands at the bottom of the electronic device, the antenna system can further include a fourth antenna ANT4.

[0102] For example Figure 4 As shown, the fourth antenna ANT4 is disposed at a position on the second long side and close to the bottom short side. The fourth antenna ANT4 is configured to have a working frequency band including a low-frequency band and a part of the medium-high frequency band. For example, in one example, the working frequency band of the fourth antenna ANT4 includes the low-frequency LB band, N41 band, and N78 band.

[0103] Since the fourth antenna ANT4 includes a low-frequency band and a medium-high frequency band, the fourth antenna ANT4 can be combined with the first antenna ANT1 or the second antenna ANT2 to implement a MIMO (Multiple in-Multiple Out) antenna system. The MIMO technology allows multiple antennas to transmit and receive signals simultaneously, improving the signal parallelism ability, and thereby improving the antenna efficiency.

[0104] As can be seen from the above, in the embodiments of the present disclosure, by suspending the first parasitic stub at the position of the data interface at the bottom of the electronic device, the first parasitic stub can be used as a parasitic structure of the bottom frame antenna, and the state of the first parasitic stub is tuned by a tuning switch to achieve the cross-intermodulation of the bottom antenna, thereby improving the natural performance of the bottom antenna and the overall antenna efficiency.

[0105] Moreover, the first parasitic stub using the floating setting is compatible with SAR detection. On the one hand, it can effectively eliminate or alleviate the ESD problem and improve the performance of the bottom antenna. On the other hand, it can effectively improve the low-frequency performance of the first antenna ANT1.

[0106] In addition, high-availability coexistence of independent Bluetooth and traditional Bluetooth / WiFi antennas can be achieved in a compact device space. 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.

[0107] Second, the embodiments of the present disclosure provide 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 palm computer, a wearable device, etc., and the present disclosure does not limit this.

[0108] In some embodiments, the electronic device includes a housing, and the housing includes a frame, where the frame refers to the appearance structure on the side of the electronic device. In the embodiments of the present disclosure, the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 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 stub. Those skilled in the art can understand this and will not be elaborated here.

[0109] In some embodiments, the electronic device further includes a data interface, and the data interface is disposed at the position of the first parasitic stub. For example, a hole can be dug on the first parasitic stub as the port of the data interface. In the examples of the present disclosure, the data interface can be any type of interface, such as a Micro USB or a Type C interface, etc., and the present disclosure does not limit this.

[0110] Figure 5 The block diagram of the electronic device in some embodiments of the present disclosure is shown below. Figure 5 The electronic device in some embodiments of the present disclosure will be described below.

[0111] Referring to Figure 5 , the electronic device 1800 may include one or more of the following components: a processing component 1802, a memory 1804, a power 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.

[0112] The processing component 1802 generally controls the overall operation of the electronic device 1800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 1802 may include one or more processors 1820 to execute instructions. Additionally, 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. As another example, the processing component 1802 may read executable instructions from the memory to implement functions related to the electronic device.

[0113] 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 may 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.

[0114] The power component 1806 provides power to the various components of the electronic device 1800. The power 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.

[0115] 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 operation mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each of the front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0116] 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 operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may 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.

[0117] The I / O interface 1812 provides an interface between the processing component 1802 and a peripheral interface module, and the peripheral interface module may be a keyboard, click wheel, buttons, etc. These buttons may include but are not limited to: home button, volume button, power button, and lock button.

[0118] The sensor component 1816 includes one or more sensors for providing status assessments of various aspects of the electronic device 1800. For example, the sensor component 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 component 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 1800, the orientation or acceleration / deceleration of the electronic device 1800, and the temperature change of the electronic device 1800. The sensor component 1816 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor component 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 component 1816 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0119] 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.

[0120] 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.

[0121] 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. And the obvious changes or modifications derived therefrom are still within the protection scope of this disclosure and creation.

Claims

1. An antenna system, characterized in that, Comprising: A first antenna and a second antenna disposed on the frame of the electronic device; A first parasitic stub, the first parasitic stub is disposed between the first antenna and the second antenna, and is coupled to the first antenna and the second antenna respectively through a slot, and the first parasitic stub is grounded through a non-rigid structure; At least one tuning switch, the tuning switch includes a plurality of tuning branches, at least one of the plurality of tuning branches is connected to the first parasitic stub, and the other tuning branches are connected to the first antenna or the second antenna.

2. The antenna system according to claim 1, wherein: The at least one tuning switch includes a first tuning switch, at least one tuning branch of the first tuning switch is connected to the first parasitic stub, and the other tuning branches are connected to the first antenna.

3. The antenna system according to claim 1, wherein: The at least one tuning switch includes a second tuning switch, at least one tuning branch of the second tuning switch is connected to the first parasitic stub, and the other tuning branches are connected to the second antenna.

4. The antenna system according to any one of claims 1 to 3, wherein: The first antenna includes a first radiation stub and a first feed, the first feed excites the first radiation stub to generate a resonance mode including a first frequency band, wherein the first radiation stub is grounded through a non-rigid structure.

5. The antenna system according to claim 4, wherein: The first antenna further includes a second parasitic stub, one end of the first radiation stub is coupled to the first parasitic stub, and the other end is coupled to the second parasitic stub, and the length of the second parasitic stub is 13 mm to 20 mm.

6. The antenna system according to any one of claims 1 to 3, wherein: The second antenna includes a second radiation stub and a second feed, the second feed excites the second radiation stub to generate a resonance mode including a second frequency band and / or a third frequency band.

7. The antenna system according to claim 1, wherein: The first parasitic stub is connected to the SAR detection circuit.

8. The antenna system according to claim 1, wherein: It further includes a third antenna, the third antenna is disposed on the electronic device away from the second antenna, and the third antenna is configured to have a working frequency band including a Bluetooth frequency band and a WiFi frequency band.

9. The antenna system according to claim 1, wherein: It further includes a fourth antenna, the fourth antenna is disposed on the frame of the electronic device close to the second antenna, and the fourth antenna is configured to have a working frequency band including a low frequency band and a part of the medium and high frequency bands.

10. An electronic device, characterized in that, Comprising: The antenna system according to any one of claims 1 to 9.

11. The electronic device according to claim 10, wherein: It further includes a data interface, and the data interface is disposed at the position of the first parasitic stub.

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