Electronic device

Abstract

Disclosed in the present application is an electronic device. The electronic device comprises: a first housing, a second housing and a matching circuit, wherein the first housing is provided with a first antenna radiator, and the first antenna radiator operates in a first frequency band; the second housing is rotatably connected to the first housing, the second housing is provided with a second antenna radiator, and the second antenna radiator operates in a second frequency band; the matching circuit is connected to a first feed point on the first antenna radiator, and the first antenna radiator is in a low impedance state by means of the matching circuit, wherein the low impedance state refers to a resistance value and a reactance value in an impedance value being within a preset range close to a zero value; when the first housing and the second housing rotate to a folded state, the matching circuit is in a first state; and in the first state, the resonant frequency at which the first antenna radiator operates in the first frequency band is less than the resonant frequency at which the second antenna radiator operates in the second frequency band.

Description

An electronic device

[0001] Cross-reference of related applications

[0002] This application claims priority to Chinese Patent Application No. 202411912764.8, filed in China on December 24, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of electronic product technology, and more particularly to an electronic device. Background Technology

[0004] With the development of foldable screen technology, foldable electronic devices are limited to only three sides per device due to the constraints of the hinge area. The introduction of satellite communication antennas into mobile phones and other electronic devices has led to an increase in the number of antennas required, further compressing the space available for antenna placement and increasing the difficulty of antenna design. Traditional antenna designs for foldable electronic devices typically place the antenna on the main body (one of the foldable device's casings) where the environment is relatively better, while adding a switch and tuning mechanism on the secondary body (the other casing) to ensure antenna performance on the main body. However, this approach, which only places the antenna on the main body, has poor utilization of the secondary body and still cannot meet the increasing space requirements for antenna placement in foldable electronic devices.

[0005] In addition, considering the placement of antennas on both the main and secondary bodies, it is also necessary to consider issues such as antenna frequency deviation, antenna efficiency degradation, and mutual interference between the main and secondary body antennas when the folded and unfolded electronic devices are in different states. In other words, when placing antennas on the secondary body, in addition to ensuring the performance of the secondary body antenna and not affecting the performance of the main body antenna, it is also necessary to consider the coexistence of the secondary body antenna and the main body antenna when the folded electronic device is in a folded state. However, there is currently no corresponding solution for this. Summary of the Invention

[0006] This application provides an electronic device to address the current problem of how to ensure the antenna performance of antennas arranged on two shells and the coexistence of antennas arranged on two shells in foldable screen electronic devices, for which there is still no solution.

[0007] To solve the above-mentioned technical problems, this application is implemented as follows:

[0008] This application provides an electronic device, including:

[0009] A first housing, on which a first antenna radiator is provided, the first antenna radiator operating in a first frequency band;

[0010] A second housing is rotatably connected to the first housing. The second housing is provided with a second antenna radiator, which operates in a second frequency band.

[0011] A matching circuit is connected to a first feed 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 and reactance values ​​in the impedance value are within a preset range close to zero.

[0012] When the first housing and the second housing 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 in the first frequency band is less than the resonant frequency of the second antenna radiator in the second frequency band.

[0013] Thus, in the above-described solution of this application, when antennas are arranged on both the first and second housings of the electronic device, a matching circuit is set at the position of the first feed point of the first antenna radiator on the first housing to ensure that the antenna impedance of the first antenna radiator is in a low impedance state. This ensures that the antenna performance of the first antenna radiator is reduced when the matching circuit is tuned to a switching state, thereby ensuring the antenna performance of the second antenna radiator. In other words, while ensuring the antenna performance of the second antenna radiator, the antenna radiation performance of the first antenna radiator itself is also avoided due to the tuning switching state of the matching circuit. Thus, the antenna performance of the first antenna radiator is simultaneously guaranteed. In this solution, while arranging antennas on both the first and second housings of the electronic device to improve the antenna layout space utilization, it also ensures that the antennas arranged on the first and second housings maintain their own antenna performance and avoid mutual interference between antennas, whether in the folded or unfolded state. This achieves the coexistence of antennas arranged on the first and second housings of the electronic device, thus solving the problem of how to ensure the antenna performance of antennas arranged on two housings and the coexistence of antennas arranged on two housings in foldable screen electronic devices, which currently lacks a solution. Attached Figure Description

[0014] Figure 1 shows one of the schematic diagrams of the antenna structure of the electronic device according to an embodiment of this application;

[0015] Figure 2 shows a second schematic diagram of the antenna structure of the electronic device according to an embodiment of this application;

[0016] Figure 3 shows a third schematic diagram of the antenna structure of the electronic device according to an embodiment of this application;

[0017] Figure 4 is a schematic diagram of the initial Smith impedance curve of the first antenna radiator according to an embodiment of this application;

[0018] Figure 5 shows a schematic diagram of the matching circuit according to an embodiment of this application;

[0019] Figure 6 shows a schematic diagram of the return loss curve of the first antenna radiator in an embodiment of this application;

[0020] Figure 7 is a schematic diagram showing the admittance relationship between positions P1 and P2 in the matching circuit of an embodiment of this application;

[0021] Figure 8 is a schematic diagram showing the change curve of the system efficiency of the first antenna radiator in the folded state when the second antenna radiator switches between different frequency bands in an embodiment of this application. Detailed Implementation

[0022] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0023] As shown in Figures 1 to 3, embodiments of this application provide an electronic device, including:

[0024] A first housing 1 is provided with a first antenna radiator 10 (i.e., the KL branch in Figures 1 to 3), and the first antenna radiator 10 operates in a first frequency band.

[0025] The second housing 2 is rotatably connected to the first housing 1. The second housing 2 is provided with a second antenna radiator 20, which operates in the second frequency band.

[0026] Matching circuit M1 is connected to the first feed point 100 on the first antenna radiator 10. The first antenna radiator 10 is in a low impedance state through the matching circuit M1. The low impedance state means that the resistance and reactance values ​​in the impedance value are within a preset range close to zero.

[0027] When the first housing 1 and the second housing 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 less than the resonant frequency of the second antenna radiator 20 operating in the second frequency band.

[0028] 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. However, when the matching circuit M1 is in the first state, the resonant frequency of the first antenna radiator 10 operating in half-wave mode is higher than the resonant frequency of the second antenna radiator 20 operating in the second frequency band, in order to assist in optimizing the antenna radiation performance of the second antenna radiator 20 when it is folded between the first housing and the second housing 2.

[0029] Optionally, the electronic device may be an electronic device with a foldable screen, such as foldable screens respectively disposed on the first housing 1 and the second housing 2; or, the first screen is disposed on the first housing 1 and the second screen is disposed on the second housing 2, etc., and the embodiments of this application are not limited thereto.

[0030] Optionally, the first housing 1 and the second housing 2 can be connected by a hinge structure 3, so that the second housing 2 and the first housing 1 can be rotated together by the hinge structure. Of course, the embodiments of this application are not limited to using a hinge structure 3 to realize the rotational connection between the second housing 2 and the first housing 1, and no specific limitation is made here.

[0031] 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 disposed 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 laid flat, or the first housing 1 and the second housing 2 are at a non-zero preset angle), since the distance between the first antenna radiator 10 and the second antenna radiator 20 is relatively large, it can be ensured that both the first antenna radiator 10 and the second antenna radiator 20 can meet the antenna performance requirements.

[0032] When the first housing 1 and the second housing 2 are in the unfolded state, as shown in Figures 1 to 3, the distance between the first antenna radiator 10 and the second antenna radiator 20 is relatively short. To ensure that both the first antenna radiator 10 and the second antenna radiator 20 have good antenna performance and to avoid mutual interference between them, this embodiment of the application sets a matching circuit M1 on the first feed point 100 of the first antenna radiator 10. By tuning the state of the matching circuit M1, the influence of the first antenna radiator 10 on the antenna performance of the second antenna radiator 20 on the second housing 2 is reduced, thus ensuring the antenna performance of the second antenna radiator 20. Furthermore, the matching circuit M1 keeps the first antenna radiator 10 in a low-impedance state, reducing the impact of the matching circuit M1 tuning on the antenna performance of the first antenna radiator 10 itself, thereby ensuring the antenna performance of the first antenna radiator 10.

[0033] Optionally, the first frequency band includes at least one of the Global Positioning System (GPS) L5 band and the Low Band (LB) band; the second frequency band includes at least one of the Middle High Band (MHB) band, the N78 band, the N79 band, and the Ultra High Band (UHB) band.

[0034] As shown in Figure 4, taking the GPS L5 band as an example, a schematic diagram of the initial Smith chart of the first antenna radiator 10 is given (i.e., the feed path is through to zero ohmic resistance (OR), without matching circuit M1). The frequency point of the GPS L5 band, 1.176GHz, is located at point Mark1, which is in the capacitive region of the Smith chart. When the length of the first antenna radiator 10 is increased, the frequency point of the GPS L5 band, 1.176GHz, can be rotated clockwise to the positions of points Mark2 and Mark3. Among them, point Mark2 intersects the real axis and is located in the low impedance region, where 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 zero). In this embodiment, point Mark2 can also be called the low impedance extreme point (that is, the first antenna radiator 10 is in a low impedance state). Point Mark3 is located in the inductive region 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 band), so the initial impedance of the first antenna radiator 10 is also fixed. That is to say, when designing the antenna, it is difficult to accurately place the initial impedance of the first antenna radiator 10 at the low impedance extreme point (i.e., Mark2 point). Therefore, this embodiment of the application designs a matching circuit M1 on the first antenna radiator 10 so that the impedance of the first antenna radiator 10 can fall at 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.

[0035] The characteristics of antenna impedance tuning are as follows: when the antenna frequency is close to the low-impedance region (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. Referring to Figure 4, when the antenna frequency moves from the Mark1 or Mark3 point to the Mark2 point, which is the approximate short-circuit point on the Smith chart, the real part of the impedance approaches 0 ohms. At this point, the series capacitor or inductor is very sensitive to the antenna impedance, while the parallel capacitor or inductor is relatively less sensitive. It should be noted that this is based on the fact that the normalized impedance of the antenna frequency approaches 0 ohms, and adding a parallel capacitor or inductor will hardly change its real impedance (except for large capacitors or small inductors, and the value at the approximate short-circuit). In this case, the antenna frequency can be kept as stable as possible with changes in the parallel capacitor or inductor, thus ensuring minimal frequency shift and a smaller frequency deviation after adding parallel matching. Therefore, in this embodiment of the 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 capacitor or inductor) can be reduced. At the same time, the antenna radiation performance of the second antenna radiator 20 when it is in a folded state between the first housing and the second housing 2 can be optimized based on the first antenna radiator 10 to construct auxiliary resonance.

[0036] In the above scheme, when antennas are arranged on both the first housing 1 and the second housing 2 of the electronic device, a matching circuit M1 is set at the position of the first feed point 100 of the first antenna radiator 10 set on the first housing 1 to ensure that the antenna impedance of the first antenna radiator 10 can be in a low impedance state. This ensures that when the matching circuit M1 is tuned to the switch state, 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 housing and the second housing 2 is reduced. That is, while ensuring the antenna performance of the second antenna radiator 20, the antenna radiation performance of the first antenna radiator 10 itself can also be avoided due to the tuning switch state of the matching circuit M1. In other words, the antenna performance of the first antenna radiator 10 is guaranteed at the same time. In this solution, antennas are arranged on both the first housing 1 and the second housing 2 of the electronic device. This not only improves the utilization rate of antenna layout space, but also ensures that the antennas arranged on the first housing 1 and the second housing 2 maintain their own antenna performance in both the folded and unfolded states, while avoiding mutual interference between the antennas. In other words, the antennas arranged on the first housing 1 and the second housing 2 of the electronic device can coexist, thus solving the problem that there is currently no solution for foldable screen electronic devices, which is how to ensure the antenna performance of antennas arranged on two housings and the coexistence of antennas arranged on two housings.

[0037] Optionally, as shown in FIG5, the matching circuit M1 includes: a first matching unit M01 and a second matching unit M02;

[0038] The first end of the first matching unit M01 is connected to the first feed 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.

[0039] Wherein, 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 less than the resonant frequency of the second antenna radiator 20 operating in the second frequency band.

[0040] 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 tuning switch state of the matching circuit M1 and preventing any impact on the antenna radiation performance of the first antenna radiator 10 itself, thus ensuring the antenna performance of the first antenna radiator 10. The second matching unit M02 can switch between multiple switching states. That is, by tuning the switching state of the second matching unit M02, the impact of the first antenna radiator 10 on the antenna performance of the second antenna radiator 20 can be reduced. In other words, 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 housing and the second housing 2 is optimized, thus ensuring the antenna performance of the second antenna radiator 20.

[0041] Optionally, the first matching unit M01 is a first capacitor, an inductor, or a zero-ohm resistor.

[0042] Referring again to Figure 5, the P0 terminal of the first matching unit M01 is the first terminal of the first capacitor, inductor, or zero-ohm resistor, and the P1 terminal of the first matching unit M01 is the second terminal of the first capacitor, inductor, or zero-ohm resistor. The first terminal is used to connect to the first feed point 100 of the first antenna radiator 10, i.e., the KL branch of the first housing 1 shown in Figures 1 to 3. For example, it can be positioned near point K as shown in Figures 1 and 2, or near point L as shown in Figure 3. The second terminal is used to connect the second matching unit M02 and the feed source S1.

[0043] For example, the first matching unit M01 can be a lumped element, and the first stage of the matching circuit M1 (i.e., the position closest to the first feed point 100 of the first antenna radiator 10) can be a capacitor, an inductor, or a zero-ohm resistor. Specifically, the selection of a capacitor, inductor, or zero-ohm resistor for the first matching unit M01 can be determined based on the initial impedance position of the first antenna radiator 10. For example, continuing to refer to Figure 2, taking GPS L5 as an example, when the initial impedance of the first antenna radiator 10 at the 1.176GHz frequency point is located at Mark1, the first matching unit M01 can be selected as an inductor; when the initial impedance of the first antenna radiator 10 at the 1.176GHz frequency point is located at Mark2, the first matching unit M01 can be selected as a zero-ohm resistor; when the initial impedance of the first antenna radiator 10 at the 1.176GHz frequency point is located at Mark3, the first matching unit M01 can be selected as a capacitor. This ensures that the antenna impedance of the first antenna radiator 10 is first tuned to the low impedance extreme point (i.e., in a low impedance state at point P1). In this way, when the second matching unit M02 is introduced at point P2 to switch the parallel capacitor or inductor, the large change in the antenna impedance of the first antenna radiator 10 caused by the tuning of various switching states by the second matching unit M02 is avoided. This reduces the impact on the input impedance of the first antenna radiator 10, thus better solving the problem of the matching circuit M1 coordinating the switching states to help improve the antenna performance of the second antenna radiator 20 while being compatible with the impedance frequency deviation of the first antenna radiator 10. This also solves the problem of how the antennas of the first housing 1 and the second housing 2 can coexist in the folded state.

[0044] As one 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 dielectric wavelength of the first antenna radiator 10 operating in the first frequency band.

[0045] Taking GPS L5 as an example, the length of the first antenna radiator 10 can be set in the range of 27mm to 33mm. At this time, the initial impedance of the first antenna radiator 10 is located in the capacitive region, as shown at point Mark2 in Figure 2. Therefore, in this embodiment, 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 switching state.

[0046] Figure 6 shows a schematic diagram of the return loss curve of the first antenna radiator 10. 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 remains essentially unchanged. That is, the matching circuit M1 in this embodiment can solve the impedance frequency offset problem of the first antenna radiator 10.

[0047] Referring to Figure 5, the sixth tuning switch SW6 can be configured with various combinations of capacitors and / or inductors. Based on the aforementioned solution to the impedance frequency deviation problem of the first antenna radiator 10, the combination of various capacitors and / or inductors should be configured in parallel (i.e., the capacitors and / or inductors connected to the sixth tuning switch SW6 are connected in parallel along the path between the first feed point 100 and the feed source S1). For ease of explanation, the low impedance extreme point (near the short-circuit point) needs to be converted to admittance. Since impedance and admittance are reciprocals, the corresponding extreme point is the high admittance extreme point (near the open-circuit point), referred to here as Y0. Y0 indicates that the first antenna radiator 10, in series with the first matching unit M01, is in a low impedance state, corresponding to the high admittance extreme point (G0 value is relatively large), which is the admittance seen from point P1 in Figure 5 towards the antenna end P0. As shown in Figure 7, Y1 represents the equivalent admittance corresponding to the switching of different capacitors and / or inductors by the sixth tuning switch SW6, and Y' represents the admittance at point P2 from the RF end to the antenna end after the introduction of the sixth tuning switch SW6. When Y'≈Y0, it means that the switching of the sixth tuning switch SW6 has little effect on the admittance (impedance) of the first antenna radiator 10 path, and will basically not cause the frequency deviation of the first antenna radiator 10. For example, when the sixth tuning switch SW6 switches the capacitor or inductor value as shown in Figure 6, the corresponding admittance Y1 is relatively small, and it is difficult to change the admittance value of Y0. That is, the admittance Y' after the introduction of the parallel sixth tuning switch SW6 is Y'=Y0+Y1≈Y0, thus solving the problem of the coexistence of the first antenna radiator 10 and the second antenna radiator 20 when the first housing 1 and the second housing 2 are in the folded state.

[0048] When considering the capacitors and / or inductors connected in parallel for the sixth tuning switch SW6, it's not possible to achieve good coexistence between the first antenna radiator 10 and the second antenna radiator 20 regardless of the switching state of the sixth tuning switch SW6. For example, a larger capacitance value or a smaller inductance value results in a larger real part of the equivalent admittance G1, leading to Y'≈Y0. This can easily change the value of Y', causing a significant frequency deviation. Alternatively, from a circuit perspective, a larger shunt current introduced by the sixth tuning switch SW6 results in greater switching losses on the first antenna radiator 10, ultimately leading to a significant decrease in the antenna efficiency of the first antenna radiator 10. To ensure good coexistence between the first antenna radiator 10 and the second antenna radiator 20 regardless of the switching state of the sixth tuning switch SW6, the capacitors and inductors connected in parallel with the sixth tuning switch SW6 need to be designed. For example, taking the first frequency band as the GPS L5 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 to be greater than 3nH. Similarly, to avoid a decrease in the antenna efficiency of the first antenna radiator 10, the sixth tuning switch SW6 should be prevented from switching to a zero-ohm resistance state. It should be noted that the values ​​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 this embodiment is not limited thereto.

[0049] Considering that the sixth tuning switch SW6 needs to tune half a mode or a higher-order mode of the first antenna radiator 10 to help improve the antenna performance of the second antenna radiator 20 in the folded state of the first housing 1 and the second housing 2, it means that when the sixth tuning switch SW6 switches states, the component values ​​corresponding to each state are mainly limited by the second antenna radiator 20. Therefore, in the embodiments of this application, the type and value of the components (such as capacitors, inductors, or combinations thereof) connected to the sixth tuning switch SW6 in each switching state can be designed based on the frequency band in which the second antenna radiator 20 operates, and are not limited to the components shown in Figure 5. For example: when the second antenna radiator 20 operates in the B3 or B39 frequency band, the sixth tuning switch SW6 can be set to switch to a capacitor (e.g., a small capacitor, the specific capacitor value is not limited here); when the second antenna radiator 20 operates in the B1, N78, or N79 frequency band, the sixth tuning switch SW6 can be set to switch to the off state (where the off state means that the sixth tuning switch SW6 is in the open state, and none of the paths of the sixth tuning switch SW6 are 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 (e.g., the inductance value can be 8.2nH, this embodiment 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., this embodiment is not limited thereto.

[0050] It should be noted that, considering the emphasis in the aforementioned embodiments that the sixth tuning switch SW6 should avoid switching to zero-ohm resistance, in order to ensure the antenna performance of the second antenna radiator 20 when it operates in the B41 frequency band, a series capacitor and inductor can be reserved on the sixth tuning switch SW6. This is equivalent to a small capacitor for the GPS L5 frequency band where the first antenna radiator operates, and equivalent to a large capacitor and a small inductor for the B41 frequency band where the second antenna radiator 20 operates, i.e., approximately a short circuit. This can solve the problem of switching coexistence in the folded state and avoid reducing the antenna efficiency of the first antenna radiator. Optionally, in the sixth tuning switch SW6, a capacitor and an inductor are reserved in series. The inductor can be selected with an inductance value in the range of 5nH to 7nH, and the capacitor can be selected with a capacitance value in the range of 0.3pF to 0.7pF. In this case, the GPS L5 frequency band in which the first antenna radiator 10 operates is equivalent to a small capacitor with a capacitance value in the range of 0.5pF to 0.7pF, which has a small impact on the admittance (impedance) of the GPS L5 frequency band in which the first antenna radiator 10 operates.

[0051] Optionally, as shown in FIG5, the matching circuit M1 further includes: a third matching unit M03;

[0052] 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 isolates the second frequency band through the third matching unit M03.

[0053] Optionally, the third matching unit M03 may include a capacitor and an inductor connected in series and parallel, such as inductor L1 and capacitor C3 as shown in FIG5. For example, the inductance value of inductor L1 can be in the range of 3nH to 5nH, and the capacitance value of capacitor C3 can be in the range of 0.3pF to 0.7pF. The capacitor and inductor connected in series and parallel present a small inductance for the GPS L5 frequency band in which the first antenna radiator 10 operates, and a large inductance for the MHB frequency band in which the second antenna radiator 20 operates, thereby effectively isolating the first antenna radiator 10 from the second antenna radiator 20.

[0054] Optionally, the third matching unit M03 may further include multiple capacitors connected in series and parallel, such as capacitors C4 to C7 as shown in Figure 5. 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. These multiple capacitors connected in series and parallel can tune the antenna impedance of the first antenna radiator 10 to around 50 ohms. In this way, when the first antenna radiator 10 operates in the GPS L5 band, the impact on the second antenna radiator 20 operating in the MHB band can be reduced to about 0.2dB.

[0055] Referring to Figure 8, the system efficiency variation curves of the first antenna radiator 10 in the folded state when the second antenna radiator 20 switches between different frequency bands are shown. From the Mark1 to Mark6 points of the curve, it can be seen that the peak system efficiency of the first antenna radiator 10 fluctuates within 1 dB with the switching of the second antenna radiator 20, and the fluctuation of the average system efficiency of the first antenna radiator 10 within the band is also basically within 1 dB (1.166 GHz to 1.186 GHz). The overall performance change is small. Therefore, this application can well realize the coexistence of the first antenna radiator 10 and the second antenna radiator 20 in the folded state.

[0056] Optionally, as shown in Figures 1 to 3, the first housing 1 is further provided with at least one of the following: a third antenna radiator 11 (i.e., the IJ branch in Figures 1 to 3) and a fourth antenna radiator 12 (i.e., the MN branch in Figures 1 to 3);

[0057] The third antenna radiator 11 has a first coupling interval JK with the first end of the first antenna radiator 10. The third antenna radiator 11 is provided with a first grounding point 110 and a second grounding point. The first grounding point 110 is located away from the first coupling interval JK, and the second grounding point is located close to the first coupling interval JK. The second grounding point is connected to a first tuning switch SW1. The third antenna radiator 11 operates in the first frequency band. When the first housing 1 and the second housing 2 are rotated to a folded state, the first tuning switch SW1 is in a second state. In the second state, the resonant frequency of the third antenna radiator 11 operating in the first frequency band is greater than the resonant frequency of the second antenna radiator 20 operating in the second frequency band.

[0058] The fourth antenna radiator 12 has a second coupling interval ML with the second end of the first antenna radiator 10. The fourth antenna radiator 12 is provided with a third grounding point 120 and a fourth grounding point. The third grounding point 120 is located away from the second coupling interval ML, and the fourth grounding point is located close to the second coupling interval ML. The fourth grounding point is connected to a second tuning switch SW2. The fourth antenna radiator 12 operates in the first frequency band. When the first housing 1 and the second housing 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 the 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.

[0059] The first feed point 100 is positioned close to the first coupling interval JK, or the first feed point 100 is positioned far away from the second coupling interval ML.

[0060] For example, the third antenna radiator 11 having a first coupling interval JK with the first end of the first antenna radiator 10 means that the third antenna radiator 11 is close to the first antenna radiator 10 but not in contact, and they interact through spatial electromagnetic fields. The fourth antenna radiator 12 having a second coupling interval ML with the second end of the first antenna radiator 10 means that the fourth antenna radiator 12 is close to the second end of the first antenna radiator 10 but not in contact, and they interact through spatial electromagnetic fields.

[0061] Optionally, the widths of the first coupling interval JK and the second coupling interval ML can be the same, thereby ensuring 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 0.8mm to 1.5mm. Optionally, the first coupling interval JK and the second coupling interval ML can be filled with non-metallic material.

[0062] It should be noted that the third antenna radiator 11 and the fourth antenna radiator 12 can operate in 1 / 4 wavelength mode to cover the first frequency band. When the first tuning switch SW1 is in the second state, the resonant frequency of the third antenna radiator 11 in 1 / 4 wavelength mode is greater than the resonant frequency of the second antenna radiator 20 in the second frequency band. When the second tuning switch SW2 is in the third state, the resonant frequency of the fourth antenna radiator 12 in 1 / 4 wavelength mode is either less than or greater than the resonant frequency of the second antenna radiator 20 in the second frequency band, meaning that the resonant frequency of the fourth antenna radiator 12 in 1 / 4 wavelength mode is far from the resonant frequency of the second antenna radiator 20 in the second frequency band.

[0063] For example, taking the first antenna radiator 10 operating in the GPS L5 band as an example, when the first feed point 100 is set close to the first coupling interval JK, as shown in Figures 1 and 3, the first feed point 100 can be set within a range of 0-3mm from point K. This embodiment of the application is not limited to this. For example, the first antenna radiator 10 can serve as the main radiator in the GPS L5 band, operating in monople mode and tuned through the matching circuit M1; the third antenna radiator 11 and the fourth antenna radiator 12 can serve as parasitic radiators in the GPS L5 band, improving the performance of the GPS L5 band antenna.

[0064] Optionally, as shown continuing to refer to Figures 1 and 3, the second antenna radiator 20 includes: a main radiator 201 (i.e., the AB branch shown in Figures 1 and 3) and a parasitic radiator 202 (i.e., the CF branch shown in Figures 1 and 3);

[0065] The main radiator 201 and the first end of the parasitic radiator 202 have a third coupling interval BC. The main radiator 201 is provided with a second feed point 2010 and a fifth ground point 2011. The second feed point 2010 is located close to the third coupling interval BC, and the fifth ground point 2011 is located away from the third coupling interval BC.

[0066] When the first housing 1 and the second housing 2 are rotated to a folded state, the parasitic radiator 202 is positioned opposite to the first antenna radiator 10. Optionally, the main radiator 201 is positioned opposite to the third antenna radiator 11.

[0067] As shown in Figure 1, the first housing 1 and the second housing 2 are connected by a hinge structure 3; the third antenna radiator 11 is located close to the hinge structure 3, that is, the main radiator 201 is located close to the hinge structure 3. The second feed point 2010 is located near 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 of the second antenna radiator 20, such as one-quarter of the dielectric wavelength corresponding to N79, but this embodiment is not limited to this). The fifth grounding point 2011 can be located at point A, for example, by grounding through the metal connecting material at point A. The entire CF branch can serve as a parasitic branch of the second antenna radiator 20, improving the antenna performance of the second antenna radiator 20.

[0068] As shown in Figure 3, the third antenna radiator 11 is positioned away from the hinge structure 3, meaning the main radiator 201 is also positioned away from the hinge structure 3. Compared to Figure 1, the first antenna radiator 10 and the second antenna radiator 20 are mirrored from the hinge on the left to the right, achieving the same coexistence in the folded state. The main radiator of the second antenna radiator 20 remains the AB branch, with the second feed point 2010 positioned near the end of the AB branch, 4mm to 6mm from point B. The fifth grounding point 2011 can be positioned at point A, for example, by grounding through a metal connector at point A. The parasitic branch of the second antenna radiator 20 remains the CF branch, improving the antenna performance of the second antenna radiator 20. The first feed point 100 is positioned near point L of the KL branch, and a matching circuit M1 is also used to achieve coexistence with the second antenna radiator 20 in the folded state.

[0069] In the embodiment shown in Figure 3, by moving the first feed point 100 to the left of the KL branch, that is, away from the hinge structure 3, the layout is more flexible and the ground current and the current on the KL branch of the first antenna radiator 10 can be better excited, thereby further improving the aperture radiation efficiency of the first antenna radiator 10.

[0070] 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 state B3, the first tuning switch SW1 needs to tune the resonance f1 frequency of the third antenna radiator 11 operating in the GPS L5 band to fall behind the B3 frequency (for example, f1 is at least not lower than 2GHz). That is, the first tuning switch SW1 is in the second state. In the second state, the resonance frequency of the third antenna radiator 11 operating in the first band is greater than the resonance frequency of the second antenna radiator 20 operating in the second band, thereby improving the folding aperture efficiency with a resonance higher than B3. The second tuning switch SW2 is also needed to tune the resonant frequency of the fourth antenna radiator 12 operating in the GPS L5 band, either lowering or raising it. Specifically, the second tuning switch SW2 is in its third state. In this third state, the resonant frequency of the fourth antenna radiator 12 operating in the first band is lower or higher than the resonant frequency of the second antenna radiator 20 operating in the second band, ensuring it is far from the B3 band (e.g., the difference between the resonant frequency of the fourth antenna radiator 12 operating in the GPS L5 band and the resonant frequency of the B3 band is within the range of 50MHz to 150MHz). For the first antenna radiator 10, the tuning matching circuit M1 needs to adjust the resonant frequency of the first antenna radiator 10 operating in the GPS L5 band to a position f2 slightly higher than the resonant frequency of the B3 band (e.g., f2 should be slightly greater than f1 to ensure optimal B3 folding performance). In other words, the resonant frequency of the first antenna radiator 10 operating in the first band is greater than the resonant frequency of the third antenna radiator 11 operating in the first band. Here, the matching circuit M1 can also achieve auxiliary tuning of the parasitic resonance of the second antenna radiator 20 in the folded state (i.e., tuning the resonant frequency of the parasitic radiator 202) to optimize folding derating and improve folding performance.

[0071] Optionally, as shown in Figures 1 and 3, the second housing 2 is further provided with a fifth antenna radiator 21 (i.e., the GH branch shown in Figures 1 and 3);

[0072] The fifth antenna radiator 21 and the second end of the parasitic radiator 202 have a fourth coupling interval FG. The fifth antenna radiator 21 is provided with a third feed point 210 and a sixth ground point 211. The third feed point 210 is located close to the fourth coupling interval FG, and the sixth ground point 211 is located away from the fourth coupling interval FG.

[0073] 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.

[0074] For example, in the folded state, the fifth antenna radiator 21 is positioned opposite to the fourth antenna radiator 12. Optionally, the third frequency band includes at least one of the following: GPS L1 band, WIFI band, and N78 band.

[0075] In this embodiment, by setting a fifth antenna radiator 21, the number of antennas in the electronic device is increased, and the utilization rate of antenna layout space in the electronic device is improved.

[0076] 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 dielectric wavelength of the first antenna radiator 10 operating in the first frequency band.

[0077] The length of parasitic radiator 202 satisfies: Where L2 is the length of the parasitic radiator 202, and λ2 is the medium wavelength of the parasitic radiator 202 when it operates in the second frequency band.

[0078] For example, if the first frequency band is the GPS L5 band and the second frequency band is the MB 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. In this way, since the parasitic radiator 202 and the first antenna radiator 10 are positioned opposite each other in the folded state, symmetry in the appearance of the electronic device can be achieved; that is, in the folded state, the parasitic radiator 202 and the first antenna radiator 10 are directly opposite each other. For example, the lengths of the parasitic radiator 202 and the first antenna radiator 10 can be within the range of 27mm to 33mm.

[0079] Optionally, the parasitic radiator 202 is provided with a seventh grounding point, an eighth grounding point, a ninth grounding point and a tenth grounding point;

[0080] The seventh grounding point is located near the third coupling interval BC and is connected to the third tuning switch SW3; the eighth grounding point is located near the fourth coupling interval FG and is connected to the fourth tuning switch SW4; the ninth and tenth grounding points are both located between the seventh and eighth grounding points, the ninth grounding point is connected to the second capacitor C1, and the tenth grounding point is connected to the third capacitor C2;

[0081] The parasitic radiator 202 operates in differential mode of the first frequency band via the third tuning switch SW3 and the fourth tuning switch SW4.

[0082] For example, the ninth grounding point is connected to a second capacitor C1, and the tenth grounding point is connected to a third capacitor C2. This can be achieved by returning the high-frequency capacitor of the specific absorption ratio (SAR) sensor to ground to isolate the second and third frequency bands. Optionally, the width between the eighth grounding point E and the ninth grounding point D is in the range of 3mm to 6mm.

[0083] 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, construct the differential mode of the CF branch, and improve the aperture radiation efficiency of the second antenna radiator 20.

[0084] In this embodiment, by means of reasonable layout and extreme point impedance tuning design on the first antenna radiator 10, the problems of coexistence of the first antenna radiator 10 and the second antenna radiator 20 in the folded state and the impact on the performance of each antenna 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 tune and optimize performance) has little impact on the antenna performance of the first antenna radiator 10. In addition, it does not require the complex function implementation of the coexistence IC, making the implementation method of this embodiment simpler and more effective, and easier to widely apply.

[0085] Optionally, as shown in FIG2, the second housing 2 is further provided with at least one of the following: a sixth antenna radiator 22 (i.e., the A'B' branch shown in FIG2) and a seventh antenna radiator 23 (i.e., the C'F' branch shown in FIG2);

[0086] The sixth antenna radiator 22 and the first end of the second antenna radiator 20 have a fifth coupling interval B'C'. The sixth antenna radiator 22 is provided with a fourth feed point 220 and an eleventh ground point 221. The fourth feed point 220 is located close to the fifth coupling interval B'C', and the eleventh ground point 221 is located away from the fifth coupling interval B'C.

[0087] The seventh antenna radiator 23 and the second end of the second antenna radiator 20 have a sixth coupling interval F'G'. The seventh antenna radiator 23 is provided with a fifth feed point 230 and a twelfth ground point 231. The fifth feed point 230 is located close to the sixth coupling interval F'G', and the twelfth ground point 231 is located away from the sixth coupling interval F'G.

[0088] The second antenna radiator 20 is provided with a sixth feed point 200 and a thirteenth ground point. The sixth feed point 200 is located close to the fifth coupling interval B'C', and the thirteenth ground point is located away from the fifth coupling interval B'C.

[0089] The sixth antenna radiator 22 operates in the fourth frequency band, and the seventh antenna radiator 23 operates in the third frequency band; when the first housing 1 and the second housing 2 are rotated to a folded state, the second antenna radiator 20 is arranged opposite to the first antenna radiator 10.

[0090] Optionally, the thirteenth grounding point is connected to a fifth tuning switch SW5; wherein, the second antenna radiator 20 operates in dipole mode of the second frequency band through the fifth tuning switch SW5.

[0091] Compared to the antenna structure shown in Figure 1, this embodiment of the application further adds a sixth antenna radiator 22 by adjusting the feed position of the second antenna radiator 20, for operation in the fourth frequency band. Specifically, the sixth feed point 200 of the second antenna radiator 20 is moved to the C'F' branch as the main radiator. The second antenna radiator 20 and the first antenna radiator 10 are arranged parallel to each other in the folded state, and this layout can also achieve the above-mentioned technical effects of Figure 1.

[0092] Optionally, the second antenna radiator 20 operates in the MHB band; the fourth band includes at least one of the N78 band, N79 band, and WIFI 5G band, for example: the sixth antenna radiator 22 operates in the N78 band, N79 band, or operates in the N78 band and WIFI 5G band.

[0093] 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' floating 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.

[0094] Specifically, the design of the seventh antenna radiator 27 operating in the third frequency band is similar to that of the fifth antenna radiator 21 in Figure 1. The designs of the first antenna radiator 10, the second antenna radiator 20, and the third antenna radiator 11 operating in the first frequency band are also similar to those in Figure 1, and their coexistence principle with the second antenna radiator 20 is the same, which will not be elaborated here. Since the first antenna radiator 10 is a floating branch and is parallel (i.e., relatively positioned) to 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, further optimizing the amplitude reduction of the first antenna radiator 10 in the folded state. Optionally, the third frequency band includes at least one of the following: GPS L1 band, WIFI band, and N78 band.

[0095] It should be noted that the second antenna radiator 20 in this embodiment is not limited to operating in the mid-high frequency (MHB) band, but can also be applied to the ultra-high frequency (UHB) band; similarly, the first antenna radiator 10 is not limited to operating in the GPS L5 band, but can also be applied to 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, N78 band, N79 band, and UHB band, etc., which will not be elaborated here.

[0096] In this embodiment, by moving the second antenna radiator 20 to the floating branch C'F', and not limiting the power supply to the hinge side, the problem of insufficient slot size of the second antenna radiator 20 due to the weak structural strength at the hinge of the whole machine can be well solved. In addition, the second antenna radiator 20 is a floating branch design and is arranged parallel to the first antenna radiator 10 in the folded state, which can also optimize the folding performance of the first antenna radiator 10.

[0097] Optionally, as shown continuing to Figure 2, the length of the first antenna radiator 10 (i.e., the KL branch) satisfies: Wherein, L1 is the length of the first antenna radiator 10, and λ1 is the dielectric wavelength of the first antenna radiator 10 operating in the first frequency band.

[0098] The length of the second antenna radiator 20 (i.e., the C'F' branch) satisfies: Where L2 is the length of the second antenna radiator 20, and λ2 is the medium wavelength of the parasitic radiator 202 when it operates in the second frequency band.

[0099] For example, if the first frequency band is the GPS L5 band and the second frequency band is the MB band, by setting... as well as The length of the second antenna radiator 20 (i.e., the C'F' branch) shown in Figure 2 can be set to be the same as the length of the first antenna radiator 10 (i.e., the KL branch). In this way, since the second antenna radiator 20 (i.e., the C'F' branch) and the first antenna radiator 10 (i.e., the KL branch) are positioned opposite each other in the folded state, symmetry in the appearance of the electronic device can be achieved; that is, in the folded state, the second antenna radiator 20 (i.e., the C'F' branch) and the first antenna radiator 10 (i.e., the KL branch) are directly opposite each other. For example, the lengths of the second antenna radiator 20 and the first antenna radiator 10 shown in Figure 2 can be within the range of 28mm to 32mm.

[0100] Optionally, the antenna radiators on the first housing 1 and the second housing can be disposed on the top of the electronic device, or on the side or bottom, etc., all of which can achieve the above-mentioned technical effects. This application embodiment is not limited thereto.

[0101] It should be noted that the electronic devices in the embodiments of this application are not limited to scenarios such as mobile phones, tablets, laptops, and smartwatches that require solving the problem of coexistence among multiple antennas, and the electronic devices in the embodiments of this application are not limited to these.

[0102] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0103] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0104] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0105] The above describes the preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles described in this application, and these improvements and modifications are also within the protection scope of this application.

Claims

1. An electronic device, comprising: A first housing, on which a first antenna radiator is provided, the first antenna radiator operating in a first frequency band; A second housing is rotatably connected to the first housing. The second housing is provided with a second antenna radiator, which operates in a second frequency band. A matching circuit is connected to a first feed 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 and reactance values ​​in the impedance value are within a preset range close to zero. When the first housing and the second housing 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 in the first frequency band is less than the resonant frequency of the second antenna radiator in the second frequency band. 2.The electronic device of claim 1, wherein, The matching circuit includes: a first matching unit and a second matching unit; The first end of the first matching unit is connected to the first feed 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 the feed source; The first antenna radiator is in a 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 less than the resonant frequency of the second antenna radiator operating in the second frequency band.

3. The electronic device of claim 2, wherein, The first matching unit is a first capacitor, an inductor, or a zero-ohm resistor.

4. The electronic device of claim 2, wherein, The matching circuit further includes: a third matching unit; The second end of the first matching unit is also connected to the feed source through the third matching unit; The first antenna radiator isolates the second frequency band through the third matching unit. 5.The electronic device of claim 1, wherein, The first housing is further 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. The third antenna radiator is provided with a first grounding point and a second grounding point. The first grounding point is located away from the first coupling interval, and the second grounding point is located close to the first coupling interval. The second grounding point is connected to a first tuning switch. The third antenna radiator operates in the first frequency band. When the first housing and the second housing are rotated to a folded state, the first tuning switch is in a second state. In the second state, the resonant frequency of the third antenna radiator operating in the first frequency band 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. The fourth antenna radiator is provided with a third grounding point and a fourth grounding point. The third grounding point is located away from the second coupling interval, and the fourth grounding point is located close to the second coupling interval. The fourth grounding point is connected to a second tuning switch. The fourth antenna radiator operates in the first frequency band. When the first housing and the second housing 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 the resonant frequency of 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. The first power supply point is located close to the first coupling interval.

6. The electronic device of claim 5, wherein, The first housing and the second housing are connected by a hinge structure; The third antenna radiator is disposed close to the hinge structure, or the third antenna radiator is disposed away from the hinge structure. 7.The electronic device of claim 1, wherein 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 feed point and a fifth ground point. The second feed point is located close to the third coupling interval, and the fifth ground point is located away from the third coupling interval. When the first housing and the second housing are rotated to a folded state, the parasitic radiator is positioned opposite to the first antenna radiator.

8. The electronic device of claim 7, wherein, 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 feed point and a sixth ground point. The third feed point is located close to the fourth coupling interval, and the sixth ground point is located 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 of claim 8, wherein, 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 located close to the third coupling interval and is connected to a third tuning switch; the eighth grounding point is located close to the fourth coupling interval and 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 differential mode of the first frequency band via the third and fourth tuning switches.

10. The electronic device of claim 7, wherein, 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: Where L2 is the length of the parasitic radiator, and λ2 is the medium wavelength at which the parasitic radiator operates in the second frequency band. 11.The electronic device of claim 1, wherein, The second housing is also provided with at least one of a sixth antenna radiator and a seventh antenna radiator; The sixth antenna radiator has a fifth coupling interval with the first end of the second antenna radiator. The sixth antenna radiator is provided with a fourth feed point and an eleventh ground point. The fourth feed point is located close to the fifth coupling interval, and the eleventh ground point is located away from the fifth coupling interval. The seventh antenna radiator has a sixth coupling interval with the second end of the second antenna radiator. The seventh antenna radiator is provided with a fifth feed point and a twelfth ground point. The fifth feed point is located close to the sixth coupling interval, and the twelfth ground point is located away from the sixth coupling interval. The second antenna radiator is provided with a sixth feed point and a thirteenth ground point. The sixth feed point is located close to the fifth coupling interval, and the thirteenth ground point is located away from the fifth coupling interval. The sixth antenna radiator operates in the fourth frequency band, and the seventh antenna radiator operates in the third frequency band; when the first housing and the second housing are rotated to a folded state, the second antenna radiator is positioned opposite to the first antenna radiator.

12. The electronic device of claim 11, wherein, The thirteenth grounding point is connected to the fifth tuning switch; The second antenna radiator operates in dipole mode of the second frequency band via the fifth tuning switch.

13. The electronic device of any of claims 1-12, wherein, 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 following: MHB band, N78 band, N79 band, and UHB band.

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

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