Electronic equipment

Abstract

The invention discloses electronic equipment. The electronic equipment comprises a first shell, a second shell and a matching circuit, the first shell is provided with a first antenna radiator, and the first antenna radiator works at a first frequency band; the second shell is rotationally connected with the first shell, a second antenna radiator is arranged on the second shell, and the second antenna radiator works at a second frequency band; the matching circuit is connected with a first feeding point on the first antenna radiator, and the first antenna radiator is in a low-impedance state through the matching circuit; wherein the low impedance state means that the resistance value and the reactance value in the impedance values are in a preset range close to zero; under the condition that the first shell and the second shell rotate to the folding state, the matching circuit is in a first state; in the first state, the resonant frequency of the first antenna radiator working in the first frequency band is smaller than the resonant frequency of the second antenna radiator working in the second frequency band.

Description

Technical Field

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

[0002] With the development of folding screen technology, folding screen electronic devices are limited by the middle hinge area, and antennas can only be arranged on three sides of the whole machine. With the introduction of satellite communication antennas in electronic devices such as mobile phones, the number of antennas that need to be arranged in electronic devices has increased, which will further compress the space for antenna layout in electronic devices and increase the difficulty of antenna design. For folding screen electronic devices, traditional antenna design generally designs the antenna to the main body side (that is, one of the shells of the folding screen electronic device) where the environment is relatively good, and adds switch tuning on the secondary body side (that is, the other shell of the folding screen electronic device) to ensure the antenna performance on the main body side. Since this method only arranges the antenna on the main body side, the utilization rate of the secondary body side is poor, and it still cannot meet the increasing number of space layout requirements for antennas in folding screen electronic devices.

[0003] In addition, when considering placing antennas on both the main and auxiliary bodies, it is also necessary to consider issues such as antenna frequency deviation, reduced antenna efficiency, and mutual influence between the main and auxiliary body antennas when the folding screen electronic device is in the folded and unfolded states. That is, when placing antennas on the auxiliary body, in addition to ensuring the antenna performance of the auxiliary body and not affecting the antenna performance of the main body, it is also necessary to consider the coexistence of the auxiliary body antenna and the main body antenna when the folding screen electronic device is in the folded state. However, there is currently no corresponding solution to this problem. Summary of the invention

[0004] An embodiment of the present application provides an electronic device to solve the problem that there is currently no solution for foldable screen electronic devices, namely, how to ensure the antenna performance of antennas arranged on two shells and how the antennas arranged on the two shells can coexist.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] An embodiment of the present application provides an electronic device, including:

[0007] A first shell, wherein a first antenna radiator is disposed on the first shell, and the first antenna radiator operates in a first frequency band;

[0008] a second shell, the second shell being rotatably connected to the first shell, the second shell being provided with a second antenna radiator, the second antenna radiator operating in a second frequency band;

[0009] A matching circuit, wherein the matching circuit is connected to a first feeding point on the first antenna radiator, and the first antenna radiator is in a low impedance state through the matching circuit; wherein the low impedance state means that the resistance value and the reactance value in the impedance value are within a preset range close to zero;

[0010] Among them, when the first shell and the second shell are rotated to a folded state, the matching circuit is in a first state; in the first state, the resonant frequency of the first antenna radiator operating in the first frequency band is lower than the resonant frequency of the second antenna radiator operating in the second frequency band.

[0011] Thus, in the above scheme of the present application, when antennas are arranged on both the first shell and the second shell of the electronic device, a matching circuit is arranged at the position of the first feeding point of the first antenna radiator arranged on the first shell to ensure that the antenna impedance of the first antenna radiator can be in a low impedance state, thereby ensuring that the switching state is tuned by the matching circuit to reduce the influence of the first antenna radiator on the antenna performance of the second antenna radiator, that is, while ensuring the antenna performance of the second antenna radiator, it can also avoid the influence on the antenna radiation performance of the first antenna radiator itself due to the matching circuit tuning switching state, that is, the antenna performance of the first antenna radiator is simultaneously ensured. Thus, in this scheme, antennas are arranged on both the first shell and the second shell of the electronic device to improve the utilization rate of the antenna layout space of the electronic device, and it can also ensure that the antennas arranged on the first shell and the second shell can avoid mutual interference between the antennas, whether in the folded state or the unfolded state, while ensuring the antenna performance of the antennas themselves, that is, the antennas arranged on the first shell and the second shell of the electronic device can coexist, thereby solving the problem that there is no solution for how to ensure the antenna performance of the antennas arranged on the two shells and the coexistence of the antennas arranged on the two shells for folding screen electronic devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 One of the schematic diagrams showing the antenna structure of the electronic device according to the embodiment of the present application;

[0013] Figure 2 A second schematic diagram showing the antenna structure of the electronic device according to an embodiment of the present application;

[0014] Figure 3 A third schematic diagram showing the antenna structure of the electronic device according to an embodiment of the present application;

[0015] Figure 4 A schematic diagram showing an initial Smith impedance curve of a first antenna radiator according to an embodiment of the present application;

[0016] Figure 5A schematic diagram showing a matching circuit according to an embodiment of the present application;

[0017] Figure 6 A schematic diagram showing a return loss curve of a first antenna radiator according to an embodiment of the present application;

[0018] Figure 7 A schematic diagram showing the admittance relationship between the positions P1 and P2 in the matching circuit of an embodiment of the present application;

[0019] Figure 8 A schematic diagram of a curve showing changes in system efficiency of the first antenna radiator when the second antenna radiator switches between various frequency bands in a folded state according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0021] like Figures 1 to 3 As shown, an embodiment of the present application provides an electronic device, including:

[0022] The first shell 1 has a first antenna radiator 10 (i.e. Figures 1 to 3 The first antenna radiator 10 operates in a first frequency band;

[0023] A second shell 2, the second shell 2 is rotatably connected to the first shell 1, the second shell 2 is provided with a second antenna radiator 20, and the second antenna radiator 20 operates in a second frequency band;

[0024] A matching circuit M1, wherein the matching circuit M1 is connected to a first feeding point 100 on the first antenna radiator 10, and the first antenna radiator 10 is in a low impedance state through the matching circuit M1; wherein the low impedance state means that the resistance value and the reactance value in the impedance value are within a preset range close to zero;

[0025] Among them, when the first shell 1 and the second shell 2 are rotated to a folded state, the matching circuit M1 is in a first state; in the first state, the resonant frequency of the first antenna radiator 10 operating in the first frequency band is lower than the resonant frequency of the second antenna radiator 20 operating in the second frequency band.

[0026] It should be noted that the resonant frequency of the first antenna radiator 10 operating in the first frequency band is lower than the resonant frequency of the second antenna radiator 20 operating in the second frequency band. When the matching circuit M1 is in the first state, the resonant frequency of the first antenna radiator 10 operating in the half-wave mode is higher than the resonant frequency of the second antenna radiator 20 operating in the second frequency band, so as to assist the resonance and optimize the antenna radiation performance of the second antenna radiator 20 when it is in a folded state between the first shell and the second shell 2.

[0027] Optionally, the electronic device may be an electronic device with a foldable screen, for example, a foldable screen is respectively arranged on the first shell 1 and the second shell 2; or, a first screen is arranged on the first shell 1, and a second screen is arranged on the second shell 2, etc. The embodiments of the present application are not limited to this.

[0028] Optionally, the first shell 1 and the second shell 2 can be connected by a hinge structure 3, so that the second shell 2 and the first shell 1 can be connected in a rotational connection through the hinge structure; of course, the embodiment of the present application is not limited to the use of the hinge structure 3 to achieve the rotational connection between the second shell 2 and the first shell 1, and no specific limitation is made here.

[0029] Optionally, the first antenna radiator 10 operating in the first frequency band and the second antenna radiator 20 operating in the second frequency band are respectively arranged on different housings of the electronic device. When the first housing 1 and the second housing 2 are in an unfolded state (for example, the first housing 1 and the second housing 2 are flatly unfolded, or there is a non-zero preset angle between the first housing 1 and the second housing 2), since the distance between the first antenna radiator 10 and the second antenna radiator 20 is relatively far, it can be ensured that the first antenna radiator 10 and the second antenna radiator 20 can both meet the antenna performance.

[0030] When the first shell 1 and the second shell 2 are in the unfolded state, for example Figures 1 to 3 As shown, the distance between the first antenna radiator 10 and the second antenna radiator 20 is relatively close. In order to ensure that both the first antenna radiator 10 and the second antenna radiator 20 have good antenna performance and avoid mutual influence between the first antenna radiator 10 and the second antenna radiator 20, the embodiment of the present application sets a matching circuit M1 on the first feeding point 100 on the first antenna radiator 10. By tuning the state of the matching circuit M1, the influence of the first antenna radiator 10 on the first housing 1 on the antenna performance of the second antenna radiator 20 on the second housing 2 is reduced, that is, the antenna performance of the second antenna radiator 20 is guaranteed. And the first antenna radiator 10 is placed in a low impedance state by the matching circuit M1 to reduce the influence on the antenna performance of the first antenna radiator 10 itself when the matching circuit M1 is tuned, thereby ensuring the antenna performance of the first antenna radiator 10.

[0031] Optionally, the first frequency band includes: at least one of the Global Positioning System (GPS) L5 band and the low frequency (LB) band; the second frequency band includes: at least one of the medium and high frequency (MHB) band, the N78 band, the N79 band, and the ultra-high frequency (UHB) band.

[0032] like Figure 4 As shown, taking the first frequency band as the GPS L5 frequency band as an example, a schematic diagram of the initial Smith impedance curve of the first antenna radiator 10 is given (i.e., the feed path is directly connected to zero ohm resistance (0R), and no matching circuit M1 is added); the frequency point 1.176GHz of the GPS L5 frequency band is located at the Mark1 point, which is in the capacitive area of ​​the Smith chart. When the length of the first antenna radiator 10 is lengthened, the frequency point 1.176GHz of the GPS L5 frequency band can be rotated clockwise to the positions of the Mark2 point and the Mark3 point. Among them, the Mark2 point intersects with the real axis and is located in the low resistance area, and the real part of the impedance tends to 0 (that is, the resistance value in the impedance value is within a preset range close to the zero value). In the embodiment of the present application, the Mark2 point can also be called a low impedance extreme point (that is, the first antenna radiator 10 is in a low impedance state), and the Mark3 point is in the inductive area of ​​the Smith chart. It should be noted that during actual debugging, the length of the first antenna radiator 10 is fixed (for example, less than 1 / 4 wavelength of the GPS L5 frequency band), so the initial impedance of the first antenna radiator 10 is also fixed. In other words, when designing the antenna, it is difficult for the initial impedance of the first antenna radiator 10 itself to accurately fall on the low impedance extreme point (i.e., Mark2 point). Therefore, the embodiment of the present application designs a matching circuit M1 on the first antenna radiator 10 so that the impedance of the first antenna radiator 10 can fall on the low impedance extreme point, that is, the first antenna radiator 10 can be in a low impedance state under the tuning of the matching circuit M1.

[0033] Consider the characteristics of antenna impedance tuning: when the antenna frequency point is close to the low impedance area (non-short-circuit point) of the Smith chart, the series capacitor or inductor is more sensitive to the antenna impedance, while the parallel capacitor or inductor is relatively less sensitive to the antenna impedance. Figure 4As shown, when the antenna frequency moves from the MarK1 point or Mark3 point to the MarK2 point, which is the approximate short-circuit point of the Smith chart, the real part of the impedance tends to 0 ohms. At this time, the series capacitor or inductor is very sensitive to the antenna impedance, while the parallel capacitor or inductor is relatively less sensitive to the antenna impedance. It should be noted that here, the real part of the normalized impedance based on the antenna frequency tends to 0 ohms, and it is difficult to change the real impedance by connecting a capacitor or inductor in parallel (except for large capacitors or small inductors, and approximate short-circuit values). In this case, it can be ensured that the antenna frequency does not change as much as possible with the change of the parallel capacitor or inductor, thereby ensuring that the antenna frequency moves very little, that is, the frequency deviation is small after the antenna is matched with parallel connection. Therefore, in the embodiment of the present application, when the antenna impedance of the first antenna radiator 10 is adjusted to a low impedance state by setting the matching circuit M1, the influence of the matching circuit M1 on the first antenna radiator 10 itself in the tuning switch state (i.e., adjusting the parallel capacitance or inductance) can be reduced. At the same time, based on the first antenna radiator 10, an auxiliary resonance can be constructed to optimize the antenna radiation performance of the second antenna radiator 20 when it is in a folded state between the first shell and the second shell 2.

[0034] In the above scheme, when antennas are arranged on both the first shell 1 and the second shell 2 of the electronic device, a matching circuit M1 is set at the position of the first feeding point 100 of the first antenna radiator 10 set on the first shell 1 to ensure that the antenna impedance of the first antenna radiator 10 can be in a low impedance state, thereby ensuring that the switching state is tuned by the matching circuit M1 to reduce the influence of the first antenna radiator 10 on the antenna performance of the second antenna radiator 20 when it is in a folded state between the first shell and the second shell 2. That is, while ensuring the antenna performance of the second antenna radiator 20, it is also possible to avoid the influence on the antenna radiation performance of the first antenna radiator 10 itself due to the tuning switching state of the matching circuit M1, that is, the antenna performance of the first antenna radiator 10 is guaranteed at the same time. In this scheme, antennas are arranged on both the first shell 1 and the second shell 2 of the electronic device to improve the utilization rate of the antenna layout space of the electronic device, and at the same time, mutual interference between the antennas can be avoided while ensuring the antenna performance of the antennas themselves, whether in a folded state or an unfolded state. That is, the antennas arranged on the first shell 1 and the second shell 2 of the electronic device can coexist, thereby solving the problem of how to ensure the antenna performance of the antennas arranged on the two shells and the coexistence of the antennas arranged on the two shells for foldable screen electronic devices, which currently has no solution.

[0035] Alternatively, if Figure 5 As shown, the matching circuit M1 includes: a first matching unit M01 and a second matching unit M02;

[0036] The first end of the first matching unit M01 is connected to the first feeding point 100, the second end of the first matching unit M01 is grounded through the second matching unit M02, and the second end of the first matching unit M01 is also connected to the feed source S1;

[0037] Among them, the first antenna radiator 10 is in the low impedance state through the first matching unit M01; when the second matching unit M02 is in the first state, the resonant frequency of the first antenna radiator 10 operating in the first frequency band is lower than the resonant frequency of the second antenna radiator 20 operating in the second frequency band.

[0038] In this embodiment, the first matching unit M01 is used to adjust the antenna impedance of the first antenna radiator 10 to a low impedance state, thereby avoiding the matching circuit M1 tuning the switch state, which affects the antenna radiation performance of the first antenna radiator 10 itself, that is, the antenna performance of the first antenna radiator 10 is guaranteed at the same time. The second matching unit M02 can switch between multiple switch states, that is, by tuning the switch state of the second matching unit M02, the influence of the first antenna radiator 10 on the antenna performance of the second antenna radiator 20 can be reduced, that is, based on the auxiliary resonance constructed by the first antenna radiator 10, the antenna radiation performance of the second antenna radiator 20 when it is in a folded state between the first shell and the second shell 2 is optimized, and the antenna performance of the second antenna radiator 20 is guaranteed.

[0039] Optionally, the first matching unit M01 is a first capacitor or inductor or a zero-ohm resistor.

[0040] If you continue to see Figure 5 The P0 end of the first matching unit M01 is the first end of the first capacitor or inductor or zero-ohm resistor, and the P1 end of the first matching unit M01 is the second end of the first capacitor or inductor or zero-ohm resistor. The first end is used to connect to the first feeding point 100 of the first antenna radiator 10, that is, Figures 1 to 3 On the KL branch of the first housing 1 shown, for example Figure 1 and Figure 2 It can be set close to point K as shown, or as Figure 3 As shown, it can also be arranged close to point L. The second end is used to connect the second matching unit M02 and the feed source S1.

[0041] For example, the first matching unit M01 may be a lumped element, and the first stage of the matching circuit M1 (i.e., the position of the first feeding point 100 closest to the first antenna radiator 10) may be a capacitor, an inductor, or a zero-ohm resistor. Specifically, the first matching unit M01 may select a capacitor, an inductor, or a zero-ohm resistor, which may be determined based on the initial impedance position of the first antenna radiator 10. For example, see Figure 2Taking the first frequency band as GPS L5 as an example, when the initial impedance of the 1.176 GHz frequency point of the first antenna radiator 10 is located at the Mark1 point, the first matching unit M01 can be selected as an inductor; when the initial impedance of the 1.176 GHz frequency point of the first antenna radiator 10 is located at the Mark2 point, the first matching unit M01 can be selected as a zero ohm resistor; when the initial impedance of the 1.176 GHz frequency point of the first antenna radiator 10 is located at the Mark3 point, the first matching unit M01 can be selected as a capacitor, so that the antenna impedance of the first antenna radiator 10 can be first tuned to the low impedance extreme point (that is, it is in a low impedance state at point P1). In this way, when the second matching unit M02 is introduced at the P2 point to switch the parallel capacitor or inductor, the antenna impedance of the first antenna radiator 10 is avoided to change drastically due to the second matching unit M02 tuning each switching state, thereby reducing the impact on the input impedance of the first antenna radiator 10. This better solves the problem that the matching circuit M1 coordinates the switching state to assist in improving the antenna performance of the second antenna radiator 20 while being compatible with the impedance frequency deviation of the first antenna radiator 10, thereby solving the problem of how the antennas of the first shell 1 and the second shell 2 can coexist in the folded state.

[0042] As an implementation method, the length of the first antenna radiator 10 can be set to Wherein, L1 is the length of the first antenna radiator 10, and λ1 is the medium wavelength of the first antenna radiator 10 working in the first frequency band.

[0043] Taking the first frequency band of GPS L5 as an example, the length of the first antenna radiator 10 can be set within the range of 27 mm to 33 mm. At this time, the initial impedance of the first antenna radiator 10 is located in the capacitive region, such as Figure 2 Therefore, in the embodiment of the present application, an inductor of 1nH to 3nH can be selected as the first matching unit M01 to first connect the initial impedance of the first antenna radiator 10 at the 1.176GHz frequency point to the low impedance extreme point (i.e., P1 is in a low impedance state), and then introduce the second matching unit M02 to tune the switch state.

[0044] like Figure 6 As shown, a schematic diagram of a return loss curve of the first antenna radiator 10 is given. It can be seen that when the second matching unit M02 is tuned to different switching states, the resonant frequency of the first antenna radiator 10 does not change substantially, that is, the matching circuit M1 of the embodiment of the present application can solve the problem of impedance frequency deviation of the first antenna radiator 10.

[0045] If you continue to see Figure 5As shown, the sixth tuning switch SW6 can be provided with a combination of multiple capacitors and / or inductors, and based on the above-mentioned solution to the impedance frequency deviation problem of the first antenna radiator 10, the combination of multiple capacitors and / or inductors should be set in parallel (that is, the capacitors and / or inductors connected to the sixth tuning switch SW6 are connected in parallel on the path between the first feeding point 100 and the feed source S1). For the convenience of principle description, based on the need to convert the low impedance extreme point (close to the short circuit point) into admittance, since the impedance and admittance are inversely proportional to each other, it corresponds to the high admittance extreme point (close to the open circuit point), which is referred to as Y0 here. Y0 indicates that the first antenna radiator 10 is in series with the first matching unit M01 and is in a low impedance state, that is, corresponding to the high admittance extreme point (G0 value is relatively large), that is, from Figure 5 The admittance from point P1 looking toward the antenna end P0. Figure 7 As shown, Y1 represents the equivalent admittance corresponding to the switching of different capacitances and / or inductances by the sixth tuning switch SW6, and Y' represents the admittance corresponding to the position of point P2 from the RF end to the antenna end after the switching of the sixth tuning switch SW6 is introduced. When Y'≈Y0, it means that the switching of the sixth tuning switch SW6 has little effect on the admittance (impedance) of the path of the first antenna radiator 10, and basically does not cause the frequency deviation of the first antenna radiator 10. For example: when the sixth tuning switch SW6 is switched as Figure 6 When the capacitance value or inductance value is as shown, the corresponding admittance Y1 is relatively small, and it is difficult to change the admittance value of Y0, that is, the admittance Y'=Y0+Y1≈Y0 after the introduction of the parallel sixth tuning switch SW6 is switched, thereby solving the problem of the coexistence of the first antenna radiator 10 and the second antenna radiator 20 when the first shell 1 and the second shell 2 are in the folded state.

[0046] When considering the switching state of the sixth tuning switch SW6 to switch the capacitor and / or inductor in parallel, it is not the case that switching to any capacitance value and / or inductance value can achieve the problem of good coexistence between the first antenna radiator 10 and the second antenna radiator 20. For example: the larger the capacitance value or the smaller the inductance value, the larger the corresponding real part of the equivalent admittance G1, and there will be Y'≈Y0, which will easily change the value of Y' and cause a large frequency deviation; or from the perspective of the circuit, the larger the shunt current introduced by the sixth tuning switch SW6, the greater the switching loss introduced to the first antenna radiator 10, which will eventually lead to a significant decrease in the antenna efficiency of the first antenna radiator 10. In order to ensure that the first antenna radiator 10 and the second antenna radiator 20 can coexist well when the sixth tuning switch SW6 is tuned to any switch state, it is necessary to design the capacitor and inductor in parallel with the sixth tuning switch SW6. For example: Taking the first frequency band as the GPS L5 frequency band, the capacitance value of the parallel capacitor of the sixth tuning switch SW6 can be set to be less than 3pF, and the inductance value of the parallel inductor can be set to be greater than 3nH. Similarly, in order to avoid a decrease in the antenna efficiency of the first antenna radiator 10, the sixth tuning switch SW6 should be avoided from switching to a zero ohm resistance state. It should be noted that the value of the parallel capacitor or inductor of the sixth tuning switch SW6 can be designed based on the specific frequency band in which the first antenna radiator 10 operates, and the embodiments of the present application are not limited thereto.

[0047] Considering that the sixth tuning switch SW6 needs to tune the half mode or high-order mode of the first antenna radiator 10 to assist in improving the antenna performance of the second antenna radiator 20 when the first shell 1 and the second shell 2 are in the folded state, that is, when the sixth tuning switch SW6 switches the switch state, the component values ​​corresponding to each state are mainly limited by the second antenna radiator 20. Therefore, in the embodiment of the present application, the type and value of the components in each switch state connected to the sixth tuning switch SW6 (such as capacitance, inductance or a combination thereof) can be designed based on the frequency band in which the second antenna radiator 20 works, and is not based on the type and value of the components in each switch state connected to the sixth tuning switch SW6. Figure 5For example, when the second antenna radiator 20 operates in the B3 frequency band or the B39 frequency band, the sixth tuning switch SW6 can be set to switch to a capacitor (for example, a small capacitor, and the specific capacitance value is not limited here); when the second antenna radiator 20 operates in the B1 frequency band or the N78 frequency band or the N79 frequency band, the sixth tuning switch SW6 can be set to switch to an off state (wherein the off state means that the sixth tuning switch SW6 is in a disconnected state, and all paths of the sixth tuning switch SW6 are not conductive); when the second antenna radiator 20 operates in the B40 frequency band, the sixth tuning switch SW6 can be set to switch to an inductor (for example, the inductor value can be 8.2nH, and the embodiment of the present application is not limited thereto); when the second antenna radiator 20 operates in the B41 frequency band, the sixth tuning switch SW6 can be set to switch to a zero ohm resistor, etc., and the embodiment of the present application is not limited thereto.

[0048] It should be noted here that, considering that the aforementioned embodiment emphasizes that the sixth tuning switch SW6 should avoid switching to a zero-ohm resistance, in order to ensure the antenna performance when the second antenna radiator 20 operates in the B41 frequency band, a series capacitor and inductor can be reserved on the sixth tuning switch SW6, so that the GPS L5 frequency band where the first antenna radiator operates is equivalent to a small capacitor, and the B41 frequency band where the second antenna radiator 20 operates is equivalent to a large capacitor and a small inductor, that is, an approximate short circuit, thereby solving the switching coexistence problem in the folded state and avoiding reducing the antenna efficiency of the first antenna radiator. Optionally, a series capacitor and inductor are reserved on the sixth tuning switch SW6, the inductor can select an inductor with an inductance value in the range of 5nH to 7nH, and the capacitor can select a capacitor with a capacitance value in the range of 0.3pF to 0.7pF. At this time, the GPS L5 frequency band in which the first antenna radiator 10 works is equivalent to a small capacitor with a capacitance value in the range of 0.5pF to 0.7pF, which has little effect on the admittance (impedance) of the GPS L5 frequency band in which the first antenna radiator 10 works.

[0049] Optionally, if you continue to see Figure 5 As shown, the matching circuit M1 further includes: a third matching unit M03;

[0050] The second end of the first matching unit M01 is also connected to the feed source S1 through the third matching unit M03; wherein the first antenna radiator 10 is isolated from the second frequency band through the third matching unit M03.

[0051] Optionally, the third matching unit M03 may include a capacitor and an inductor connected in series and in parallel, such as Figure 5The inductor L1 and the capacitor C3 shown; for example: the inductance value of the inductor L1 can be in the range of 3nH to 5nH, and the capacitance value of the capacitor C3 can be in the range of 0.3pF to 0.7pF. The series-parallel capacitor and inductor present a small inductance for the GPS L5 frequency band in which the first antenna radiator 10 works, and a large inductance for the MHB frequency band in which the second antenna radiator 20 works, thereby achieving good isolation of the first antenna radiator 10 from the second antenna radiator 20.

[0052] Optionally, the third matching unit M03 may also include a plurality of capacitors connected in series and in parallel, such as Figure 5 The capacitors C4 to C7 shown, for example, the capacitance value of capacitor C4 can be in the range of 1pF to 3pF, the capacitance value of capacitor C5 can be in the range of 3pF to 5pF, the capacitance value of capacitor C6 can be in the range of 2pF to 3pF, and the capacitance value of capacitor C7 can be in the range of 2pF to 3pF. The multiple capacitors connected in series and parallel can tune the antenna impedance of the first antenna radiator 10 to near Smith 50 ohms. In this way, when the first antenna radiator 10 operates in the GPS L5 frequency band, the influence on the second antenna radiator 20 operating in the MHB frequency band can be reduced to about 0.2dB.

[0053] See also Figure 8 As shown, a curve of the change of the system efficiency of the first antenna radiator 10 in the folded state when the second antenna radiator 20 switches between various frequency bands is given. It can be seen from the Mark1 to Mark6 points of the curve that the peak value of the system efficiency of the first antenna radiator 10 fluctuates within 1dB as the second antenna radiator 20 switches, and the average system efficiency fluctuation of the first antenna radiator 10 in the band is also basically within 1dB (1.166GHz~1.186GHz), and the overall performance changes little. Therefore, the present application can well realize the coexistence of the first antenna radiator 10 and the second antenna radiator 20 in the folded state.

[0054] Optionally, if you continue to see Figures 1 to 3 As shown, the first housing 1 is also provided with: a third antenna radiator 11 (i.e. Figures 1 to 3 IJ branch in) and the fourth antenna radiator 12 (i.e. Figures 1 to 3 at least one of the MN branches in ;

[0055] The third antenna radiator 11 and the first end of the first antenna radiator 10 have a first coupling interval JK, and the third antenna radiator 11 is provided with a first grounding point 110 and a second grounding point, the first grounding point 110 is arranged away from the first coupling interval JK, the second grounding point is arranged close to the first coupling interval JK, and the second grounding point is connected to a first tuning switch SW1; wherein the third antenna radiator 11 operates in the first frequency band; when the first shell 1 and the second shell 2 are rotated to a folded state, the first tuning switch SW1 is in a second state; in the second state, the third antenna radiator 11 operates at a resonant frequency in the first frequency band, which is greater than the resonant frequency of the second antenna radiator 20 operating in the second frequency band;

[0056] The fourth antenna radiator 12 has a second coupling interval ML with the second end of the first antenna radiator 10, and a third grounding point 120 and a fourth grounding point are provided on the fourth antenna radiator 12, the third grounding point 120 is arranged away from the second coupling interval ML, the fourth grounding point is arranged close to the second coupling interval ML, and the fourth grounding point is connected to a second tuning switch SW2; wherein the fourth antenna radiator 12 operates in the first frequency band; when the first shell 1 and the second shell 2 are rotated to a folded state, the second tuning switch SW2 is in a third state; in the third state, the fourth antenna radiator 12 operates at a resonant frequency of the first frequency band, which is less than or greater than the resonant frequency of the second antenna radiator 20 operating in the second frequency band;

[0057] The first feeding point 100 is disposed close to the first coupling interval JK, or the first feeding point 100 is disposed far away from the second coupling interval ML.

[0058] For example, the third antenna radiator 11 and the first end of the first antenna radiator 10 have a first coupling interval JK, which means that the third antenna radiator 11 is closer to the first antenna radiator 10 and does not touch it, and interacts with each other through the space electromagnetic field. The fourth antenna radiator 12 and the second end of the first antenna radiator 10 have a second coupling interval ML, which means that the fourth antenna radiator 12 is closer to the second end of the first antenna radiator 10 and does not touch it, and interacts with each other through the space electromagnetic field.

[0059] Optionally, the widths of the first coupling interval JK and the second coupling interval ML may be the same, so as to ensure the symmetry of the overall appearance of the electronic device; for example, the widths of the first coupling interval JK and the second coupling interval ML are in the range of 0.8 mm to 1.5 mm. Optionally, the first coupling interval JK and the second coupling interval ML may be filled with non-metallic materials.

[0060] It should be noted that the third antenna radiator 11 and the fourth antenna radiator 12 can operate in a 1 / 4 wavelength mode to cover the first frequency band. When the first tuning switch SW1 is in the second state, the third antenna radiator 11 operates in a resonant frequency of the 1 / 4 wavelength mode, which is greater than the resonant frequency of the second antenna radiator 20 operating in the second frequency band. When the second tuning switch SW2 is in the third state, the fourth antenna radiator 12 operates in a resonant frequency of the 1 / 4 wavelength mode, which is less than or greater than the resonant frequency of the second antenna radiator 20 operating in the second frequency band, that is, the resonant frequency of the fourth antenna radiator 12 operating in the 1 / 4 wavelength mode is far away from the resonant frequency of the second antenna radiator 20 operating in the second frequency band.

[0061] For example, taking the first antenna radiator 10 working in the GPS L5 frequency band as an example, when the first feeding point 100 is arranged close to the first coupling interval JK, Figure 1 and Figure 3 As shown, the first feeding point 100 can be set in the range of 0 to 3 mm near the K point, and the embodiments of the present application are not limited to this. For example: the first antenna radiator 10 can be used as the main radiator of the GPS L5 frequency band, working in a monopole mode, and tuned by the matching circuit M1; the third antenna radiator 11 and the fourth antenna radiator 12 can be used as parasitic radiators of the GPS L5 frequency band to improve the GPS L5 frequency band antenna performance.

[0062] Optionally, if you continue to see Figure 1 and Figure 3 As shown, the second antenna radiator 20 includes: a main radiator 201 (i.e. Figure 1 and Figure 3 AB branch shown) and parasitic radiator 202 (ie Figure 1 and Figure 3 CF branches shown);

[0063] The main radiator 201 and the first end of the parasitic radiator 202 have a third coupling interval BC, and the main radiator 201 is provided with a second feeding point 2010 and a fifth grounding point 2011, the second feeding point 2010 is arranged close to the third coupling interval BC, and the fifth grounding point 2011 is arranged away from the third coupling interval BC.

[0064] When the first shell 1 and the second shell 2 are rotated to a folded state, the parasitic radiator 202 is disposed opposite to the first antenna radiator 10. Optionally, the main radiator 201 is disposed opposite to the third antenna radiator 11.

[0065] like Figure 1 As shown, the first shell 1 and the second shell 2 are connected by a hinge structure 3; the third antenna radiator 11 is arranged close to the hinge structure 3, that is, the main radiator 201 is arranged close to the hinge structure 3. The second feeding point 2010 is arranged close to the end of the AB branch, 5mm to 7mm away from point B (for example, it can be designed according to the highest frequency band in the operating frequency band of the second antenna radiator 20, such as N79 corresponding to one quarter of the medium wavelength, and the embodiments of the present application are not limited to this). The fifth grounding point 2011 can be set at point A. For example, by grounding the metal connecting material at point A, the entire CF branch can serve as a parasitic branch of the second antenna radiator 20 to improve the antenna performance of the second antenna radiator 20.

[0066] like Figure 3 As shown, the third antenna radiator 11 is arranged away from the hinge structure 3, that is, the main radiator 201 is arranged away from the hinge structure 3. Figure 1 In comparison, the first antenna radiator 10 and the second antenna radiator 20 are mirrored from the hinge on the left to the right, and the problem of coexistence in the folded state can also be solved. The main radiator of the second antenna radiator 20 is still the AB branch, and the second feeding point 2010 is set near the end of the AB branch, 4mm to 6mm away from point B. The fifth grounding point 2011 can be set at point A, such as through the metal connection material at point A. The parasitic branch of the second antenna radiator 20 is still the CF branch, which improves the antenna performance of the second antenna radiator 20. The first feeding point 100 is set near the L point of the KL branch, and the matching circuit M1 is also used to achieve coexistence with the second antenna radiator 20 in the folded state.

[0067] exist Figure 3 In the illustrated embodiment, by moving the first feeding point 100 to the left of the KL branch, i.e., away from the hinge structure 3, the layout is made more flexible, and the floor current of the first antenna radiator 10 and the current on the KL branch can be better stimulated, thereby further improving the aperture radiation efficiency of the first antenna radiator 10.

[0068] Specifically, in the folded state, the matching circuit M1 and the first tuning switch SW1 and / or the second tuning switch SW2 all participate in the tuning. For example, when the main resonance of the second antenna radiator 20 is in the B3 state, the first tuning switch SW1 is required to tune the resonance f1 frequency of the third antenna radiator 11 operating in the GPS L5 frequency band to fall behind the B3 frequency (for example, f1 is at least not less than 2 GHz), that is, the first tuning switch SW1 is in the second state. In the second state, the third antenna radiator 11 operates at a resonance frequency in the first frequency band, which is greater than the resonance frequency of the second antenna radiator 20 operating in the second frequency band, thereby assisting in improving the folded aperture efficiency with a resonance higher than B3. The second tuning switch SW2 is also required to tune the resonant frequency of the fourth antenna radiator 12 working in the GPS L5 frequency band to lower or raise it, that is, the second tuning switch SW2 is in the third state. In the third state, the resonant frequency of the fourth antenna radiator 12 working in the first frequency band is less than or greater than the resonant frequency of the second antenna radiator 20 working in the second frequency band to ensure that it is far away from the B3 frequency band (for example, the difference between the resonant frequency of the fourth antenna radiator 12 working in the GPS L5 frequency band and the resonant frequency of the B3 frequency band is in the range of 50MHz to 150MHz); for the first antenna radiator 10, the tuning matching circuit M1 is required to adjust the resonant frequency of the first antenna radiator 10 working in the GPS L5 frequency band to a position f2 that is slightly higher than the resonant frequency of the B3 frequency band (for example, f2 should be slightly greater than f1 to ensure the optimal B3 folding performance), that is, the resonant frequency of the first antenna radiator 10 working in the first frequency band is greater than the resonant frequency of the third antenna radiator 11 working in the first frequency band. Here, the matching circuit M1 can also realize auxiliary tuning of the parasitic resonance of the second antenna radiator 20 in the folded state (ie, tuning the resonant frequency of the parasitic radiator 202 ) to optimize the folding derating and improve the folding performance.

[0069] Optionally, if you continue to see Figure 1 and Figure 3 As shown, the second housing 2 is also provided with: a fifth antenna radiator 21 (ie Figure 1 and Figure 3 GH branches shown);

[0070] The fifth antenna radiator 21 and the second end of the parasitic radiator 202 have a fourth coupling interval FG, and the fifth antenna radiator 21 is provided with a third feeding point 210 and a sixth grounding point 211, wherein the third feeding point 210 is arranged close to the fourth coupling interval FG, and the sixth grounding point 211 is arranged far away from the fourth coupling interval FG;

[0071] The fifth antenna radiator 21 operates in the third frequency band, or the fifth antenna radiator 21 and the parasitic radiator 202 operate in the third frequency band.

[0072] For example, in the folded state, the fifth antenna radiator 21 is arranged opposite to the fourth antenna radiator 12. Optionally, the third frequency band includes at least one of a GPS L1 frequency band, a WIFI frequency band, and an N78 frequency band.

[0073] In this embodiment, by providing the fifth antenna radiator 21, the number of antennas in the electronic device is increased, and the utilization rate of the antenna layout space in the electronic device is improved.

[0074] Optionally, the length of the first antenna radiator 10 satisfies: Wherein, L1 is the length of the first antenna radiator 10, and λ1 is the medium wavelength of the first antenna radiator 10 operating in the first frequency band;

[0075] The length of the parasitic radiator 202 satisfies: Wherein, L2 is the length of the parasitic radiator 202, and λ2 is the medium wavelength of the parasitic radiator 202 working in the second frequency band.

[0076] For example, when the first frequency band is the GPS L5 frequency band and the second frequency band is the MB frequency band, by setting as well as The length of the parasitic radiator 202 can be set to be the same as the length of the first antenna radiator 10, so that in the folded state, the parasitic radiator 202 and the first antenna radiator 10 are arranged opposite to each other, so that the electronic device can be symmetrical in appearance, that is, in the folded state, the parasitic radiator 202 and the first antenna radiator 10 are arranged opposite to each other. For example, the length of the parasitic radiator 202 and the length of the first antenna radiator 10 can be in the range of 27 mm to 33 mm.

[0077] Optionally, a seventh grounding point, an eighth grounding point, a ninth grounding point and a tenth grounding point are provided on the parasitic radiator 202;

[0078] The seventh grounding point is arranged close to the third coupling interval BC, and the seventh grounding point is connected to the third tuning switch SW3; the eighth grounding point is arranged close to the fourth coupling interval FG, and the eighth grounding point is connected to the fourth tuning switch SW4; the ninth grounding point and the tenth grounding point are both located between the seventh grounding point and the eighth grounding point, the ninth grounding point is connected to the second capacitor C1, and the tenth grounding point is connected to the third capacitor C2;

[0079] The parasitic radiator 202 operates in the differential mode of the first frequency band through the third tuning switch SW3 and the fourth tuning switch SW4.

[0080] For example, the ninth grounding point is connected to the second capacitor C1, and the tenth grounding point is connected to the third capacitor C2, which can be returned to the ground through the high-frequency capacitor of the Specific Absorption Ratio (SAR) sensor to isolate the second frequency band and the third frequency band; optionally, the width between the eighth grounding point E and the ninth grounding point D is in the range of 3mm to 6mm.

[0081] For another example, the third tuning switch SW3 and the fourth tuning switch SW4 can respectively tune the parasitic resonance of the second antenna radiator 20 to construct the differential mode of the CF branch and improve the aperture radiation efficiency of the second antenna radiator 20 .

[0082] In the embodiment of the present application, through reasonable layout and the use of extreme point impedance tuning design on the first antenna radiator 10, the coexistence of the first antenna radiator 10 and the second antenna radiator 20 in the folded state and the impact of each antenna performance can be cleverly solved. At the same time, the antenna tuning of the second antenna radiator 20 in the folded state (mainly relying on the switch on the first antenna radiator 10 to coordinate the tuning and optimize the performance) has little effect on the antenna performance of the first antenna radiator 10. In addition, there is no need to rely on the complex functions of the coexistence IC to achieve this, which makes the implementation method of the solution of the embodiment of the present application more simple and effective, and is convenient for wide application.

[0083] Optionally, if you continue to see Figure 2 As shown, the second housing 2 is also provided with: a sixth antenna radiator 22 (ie Figure 2 A'B' branch shown) and the seventh antenna radiator 23 (ie Figure 2 at least one of the C'F' branches shown;

[0084] The sixth antenna radiator 22 and the first end of the second antenna radiator 20 have a fifth coupling interval B'C', and the sixth antenna radiator 22 is provided with a fourth feeding point 220 and an eleventh grounding point 221, wherein the fourth feeding point 220 is arranged close to the fifth coupling interval B'C', and the eleventh grounding point 221 is arranged far away from the fifth coupling interval B'C';

[0085] The seventh antenna radiator 23 and the second end of the second antenna radiator 20 have a sixth coupling interval F'G', and the seventh antenna radiator 23 is provided with a fifth feeding point 230 and a twelfth grounding point 231, the fifth feeding point 230 is arranged close to the sixth coupling interval F'G', and the twelfth grounding point 231 is arranged away from the sixth coupling interval F'G';

[0086] The second antenna radiator 20 is provided with a sixth feeding point 200 and a thirteenth grounding point, the sixth feeding point 200 is arranged close to the fifth coupling interval B'C', and the thirteenth grounding point is arranged away from the fifth coupling interval B'C';

[0087] Among them, the sixth antenna radiator 22 works in the fourth frequency band, and the seventh antenna radiator 23 works in the third frequency band; when the first shell 1 and the second shell 2 are rotated to a folded state, the second antenna radiator 20 is arranged opposite to the first antenna radiator 10.

[0088] Optionally, the thirteenth grounding point is connected to a fifth tuning switch SW5; wherein the second antenna radiator 20 operates in a dipole mode of the second frequency band through the fifth tuning switch SW5.

[0089] and Figure 1 Compared with the antenna structure shown in FIG. 1 , the embodiment of the present application further adds a sixth antenna radiator 22 by adjusting the feeding position of the second antenna radiator 20, so as to work in the fourth frequency band. Specifically, the sixth feeding point 200 of the second antenna radiator 20 is moved to the C'F' branch to serve as the main radiator. The second antenna radiator 20 is arranged parallel to the first antenna radiator 10 in the folded state. This layout scheme can also achieve Figure 1 The above technical effects.

[0090] Optionally, the second antenna radiator 20 operates in the MHB frequency band; the fourth frequency band includes: at least one of: the N78 frequency band, the N79 frequency band, and the WIFI 5G frequency band, for example: the sixth antenna radiator 22 operates in the N78 frequency band, the N79 frequency band, or operates in the N78 frequency band and the WIFI 5G frequency band.

[0091] For example: the length of the sixth antenna radiator 22 is in the range of 7mm to 9mm; the length of the second antenna radiator 20 is in the range of 28mm to 32mm, and its excitation mode is the dipole mode of the C'F' suspended branch. At this time, the C'F' branch can be better excited and the tuning length can be switched by the fifth tuning switch SW5.

[0092] Specifically, the design of the seventh antenna radiator 27 operating in the third frequency band is Figure 1 Similar to the fifth antenna radiator 21 in FIG. 1 , the design of the first antenna radiator 10, the second antenna radiator 20 and the third antenna radiator 11 working in the first frequency band is the same as that of the fifth antenna radiator 21 in FIG. Figure 1Similarly, the coexistence principle with the second antenna radiator 20 is the same, which will not be repeated here. Since the first antenna radiator 10 is a suspended branch and is arranged in parallel (i.e., relatively arranged) with the second antenna radiator 20 in the folded state, the influence of the second antenna radiator 20 on the first antenna radiator 10 in the folded state can be reduced, and the reduction of the first antenna radiator 10 in the folded state can be further optimized. Optionally, the third frequency band includes: at least one of the GPS L1 frequency band, the WIFI frequency band, and the N78 frequency band.

[0093] It should be noted that the second antenna radiator 20 in the embodiment of the present application is not limited to working in the MHB band, but can also be used in the UHB band; similarly, the first antenna radiator 10 is not limited to working in the GPS L5 band, but can also be used in the LB band. For example: the first frequency band includes: at least one of the GPS L5 band and the LB band; the second frequency band includes: at least one of the MHB band, the N78 band, the N79 band, and the UHB band, etc., which will not be repeated here.

[0094] In this embodiment, by moving the second antenna radiator 20 to the suspended branch C'F', it is not limited to the hinge side feeding, and the problem of insufficient slot size of the second antenna radiator 20 due to the weak structural strength of the hinge of the whole machine can be well solved; in addition, the second antenna radiator 20 is designed as a suspended branch and is arranged in parallel with the first antenna radiator 10 in the folded state, which can also optimize the folding performance of the first antenna radiator 10.

[0095] Optionally, if you continue to see Figure 2 As shown, the length of the first antenna radiator 10 (ie, the KL branch) satisfies: Wherein, L1 is the length of the first antenna radiator 10, and λ1 is the medium wavelength of the first antenna radiator 10 operating in the first frequency band;

[0096] The length of the second antenna radiator 20 (ie, the C'F' branch) satisfies: Wherein, L2 is the length of the second antenna radiator 20, and λ2 is the medium wavelength of the parasitic radiator 202 operating in the second frequency band.

[0097] For example, when the first frequency band is the GPS L5 frequency band and the second frequency band is the MB frequency band, by setting as well as Can be set Figure 2 The length of the second antenna radiator 20 (ie, the C'F' branch) is the same as the length of the first antenna radiator 10 (ie, the KL branch). Figure 2The second antenna radiator 20 (i.e., C'F' branch) and the first antenna radiator 10 (i.e., KL branch) are arranged opposite to each other, so that the electronic device can be symmetrical in appearance, that is, in the folded state, the second antenna radiator 20 (i.e., C'F' branch) and the first antenna radiator 10 (i.e., KL branch) are arranged opposite to each other. For example: Figure 2 The length of the second antenna radiator 20 and the length of the first antenna radiator 10 shown may be in the range of 28 mm to 32 mm.

[0098] Optionally, the antenna radiators on the first shell 1 and the second shell can be set on the top of the electronic device, or can also be set on the side or bottom, etc., all of which can achieve the above-mentioned technical effects, and the embodiments of the present application are not limited to this.

[0099] It should be noted that the electronic devices in the embodiments of the present application are not limited to scenarios such as mobile phones, tablet computers, laptop computers, smart watches, etc. that need to solve the coexistence problem between multiple antennas, and the electronic devices in the embodiments of the present application are not limited to this.

[0100] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0101] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0102] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0103] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary personnel in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications are also within the scope of protection of the present application.

Claims

1. An electronic device, characterized in that: include: A first shell, wherein a first antenna radiator is disposed on the first shell, and the first antenna radiator operates in a first frequency band; a second shell, the second shell being rotatably connected to the first shell, the second shell being provided with a second antenna radiator, the second antenna radiator operating in a second frequency band; A matching circuit, wherein the matching circuit is connected to a first feeding point on the first antenna radiator, and the first antenna radiator is in a low impedance state through the matching circuit; wherein the low impedance state means that the resistance value and the reactance value in the impedance value are within a preset range close to zero; Among them, when the first shell and the second shell are rotated to a folded state, the matching circuit is in a first state; in the first state, the resonant frequency of the first antenna radiator operating in the first frequency band is lower than the resonant frequency of the second antenna radiator operating in the second frequency band.

2. The electronic device according to claim 1, characterized in that: The matching circuit comprises: a first matching unit and a second matching unit; The first end of the first matching unit is connected to the first feeding point, the second end of the first matching unit is grounded through the second matching unit, and the second end of the first matching unit is also connected to a feed source; Wherein, the first antenna radiator is in the low impedance state through the first matching unit; When the second matching unit is in the first state, the resonant frequency of the first antenna radiator operating in the first frequency band is lower than the resonant frequency of the second antenna radiator operating in the second frequency band.

3. The electronic device according to claim 2, characterized in that: The first matching unit is a first capacitor or an inductor or a zero-ohm resistor.

4. The electronic device according to claim 2, characterized in that: The matching circuit further includes: a third matching unit; The second end of the first matching unit is also connected to a feed source through the third matching unit; Wherein, the first antenna radiator is isolated from the second frequency band by the third matching unit.

5. The electronic device according to claim 1, characterized in that: The first housing is also provided with: at least one of a third antenna radiator and a fourth antenna radiator; The third antenna radiator has a first coupling interval with the first end of the first antenna radiator, and a first grounding point and a second grounding point are provided on the third antenna radiator, the first grounding point is arranged away from the first coupling interval, the second grounding point is arranged close to the first coupling interval, and the second grounding point is connected to a first tuning switch; wherein the third antenna radiator operates in the first frequency band; when the first shell and the second shell are rotated to a folded state, the first tuning switch is in a second state; in the second state, the third antenna radiator operates at a resonant frequency in the first frequency band, which is greater than the resonant frequency of the second antenna radiator operating in the second frequency band; The fourth antenna radiator has a second coupling interval with the second end of the first antenna radiator, and a third grounding point and a fourth grounding point are provided on the fourth antenna radiator, the third grounding point is arranged away from the second coupling interval, the fourth grounding point is arranged close to the second coupling interval, and the fourth grounding point is connected to a second tuning switch; wherein the fourth antenna radiator operates in the first frequency band; when the first shell and the second shell are rotated to a folded state, the second tuning switch is in a third state; in the third state, the fourth antenna radiator operates at a resonant frequency in the first frequency band, which is less than or greater than the resonant frequency of the second antenna radiator operating in the second frequency band; Wherein, the first feeding point is arranged close to the first coupling interval.

6. The electronic device according to claim 5, characterized in that: The first shell and the second shell are connected by a hinge structure; The third antenna radiator is disposed close to the hinge structure, or the third antenna radiator is disposed far away from the hinge structure.

7. The electronic device according to claim 1, characterized in that: The second antenna radiator includes: a main radiator and a parasitic radiator; The main radiator and the first end of the parasitic radiator have a third coupling interval, the main radiator is provided with a second feeding point and a fifth grounding point, the second feeding point is arranged close to the third coupling interval, and the fifth grounding point is arranged away from the third coupling interval; Wherein, when the first shell and the second shell are rotated to a folded state, the parasitic radiator is arranged opposite to the first antenna radiator.

8. The electronic device according to claim 7, characterized in that: The second housing is also provided with: a fifth antenna radiator; The fifth antenna radiator and the second end of the parasitic radiator have a fourth coupling interval, the fifth antenna radiator is provided with a third feeding point and a sixth grounding point, the third feeding point is arranged close to the fourth coupling interval, and the sixth grounding point is arranged away from the fourth coupling interval; The fifth antenna radiator operates in the third frequency band, or the fifth antenna radiator and the parasitic radiator operate in the third frequency band.

9. The electronic device according to claim 8, characterized in that: The parasitic radiator is provided with a seventh grounding point, an eighth grounding point, a ninth grounding point and a tenth grounding point; The seventh grounding point is arranged close to the third coupling interval, and the seventh grounding point is connected to a third tuning switch; the eighth grounding point is arranged close to the fourth coupling interval, and the eighth grounding point is connected to a fourth tuning switch; the ninth grounding point and the tenth grounding point are both located between the seventh grounding point and the eighth grounding point, the ninth grounding point is connected to a second capacitor, and the tenth grounding point is connected to a third capacitor; The parasitic radiator operates in a differential mode of the first frequency band through the third tuning switch and the fourth tuning switch.

10. The electronic device according to claim 7, characterized in that: The length of the first antenna radiator satisfies: Wherein, L1 is the length of the first antenna radiator, and λ1 is the medium wavelength of the first antenna radiator operating in the first frequency band; The length of the parasitic radiator satisfies: Wherein, L2 is the length of the parasitic radiator, and λ2 is the medium wavelength of the parasitic radiator working in the second frequency band.

11. The electronic device according to claim 1, characterized in that: The second housing is also provided with: at least one of a sixth antenna radiator and a seventh antenna radiator; The sixth antenna radiator and the first end of the second antenna radiator have a fifth coupling interval, the sixth antenna radiator is provided with a fourth feeding point and an eleventh grounding point, the fourth feeding point is arranged close to the fifth coupling interval, and the eleventh grounding point is arranged away from the fifth coupling interval; The seventh antenna radiator and the second end of the second antenna radiator have a sixth coupling interval, the seventh antenna radiator is provided with a fifth feeding point and a twelfth grounding point, the fifth feeding point is arranged close to the sixth coupling interval, and the twelfth grounding point is arranged away from the sixth coupling interval; The second antenna radiator is provided with a sixth feeding point and a thirteenth grounding point, the sixth feeding point is arranged close to the fifth coupling interval, and the thirteenth grounding point is arranged far away from the fifth coupling interval; Among them, the sixth antenna radiator works in the fourth frequency band, and the seventh antenna radiator works in the third frequency band; when the first shell and the second shell are rotated to a folded state, the second antenna radiator is arranged opposite to the first antenna radiator.

12. The electronic device according to claim 11, characterized in that: The thirteenth grounding point is connected to a fifth tuning switch; Wherein, the second antenna radiator operates in a dipole mode of a second frequency band through the fifth tuning switch.

13. The electronic device according to any one of claims 1 to 12, characterized in that: The first frequency band includes: at least one of the GPS L5 frequency band and the LB frequency band; The second frequency band includes: at least one of: an MHB frequency band, an N78 frequency band, an N79 frequency band, and an UHB frequency band.

14. The electronic device according to claim 8 or 11, characterized in that: The third frequency band includes: at least one of the GPS L1 frequency band, the WIFI frequency band, and the N78 frequency band; The fourth frequency band includes: at least one of the N78 frequency band, the N79 frequency band, and the WIFI 5G frequency band.

Images