Electronic device

Abstract

The invention relates to an electronic device. A second grounding point is additionally arranged on a radiating body, a first tuning circuit is arranged between the second grounding point and a metal floor, and under the condition that the radiating body is coupled with the metal floor under excitation of a feed source, current distribution on the radiating body is adjusted based on the tuning effect of the first tuning circuit; the radiator works in any one of a first resonant mode and a second resonant mode of a preset frequency band, current distribution in the first resonant mode is from the feeding point to the second end of the radiator, and current distribution in the second resonant mode is from the first grounding point to a current zero point on the radiator and from the second grounding point to the current zero point; under two different current distributions, the directional diagrams of the first resonant mode and the second resonant mode are complementary, multi-directional communication of a preset frequency band can be realized without adding parasitic branches, and the antenna miniaturization design is considered while the communication quality is ensured.

Description

Technical Field

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

[0002] With the popularization of electronic devices, people have higher and higher requirements for the communication performance of electronic devices. For multiple communication requirements, they are mostly met by setting multiple antennas in the electronic device to meet user needs.

[0003] However, as the batteries of electronic devices are getting larger and the products are getting thinner, the accommodation space left for the antennas is getting smaller, making it difficult to balance the multiple communication requirements of the electronic device and the miniaturized design of the antennas. Summary of the Invention

[0004] Based on this, it is necessary to provide an electronic device that can balance communication performance and the miniaturized design of antennas.

[0005] An embodiment of the present application provides an electronic device, including:

[0006] A metal floor;

[0007] A feed source;

[0008] A radiator having a first end and a second end, with a first grounding point, a feeding point connected to the feed source, and a second grounding point sequentially and spacedly distributed between the first end and the second end of the radiator, and the first grounding point is connected to the metal floor;

[0009] A first tuning circuit connected to the second grounding point and the metal floor respectively;

[0010] When the radiator is coupled with the metal floor under the excitation of the feed source, the first tuning circuit tunes the radiator so that the radiator operates in any one of a first resonance mode and a second resonance mode in a preset frequency band;

[0011] The current distribution in the first resonance mode is from the feeding point to the second end of the radiator, and the current distribution in the second resonance mode is from the first grounding point to the current zero point on the radiator and from the second grounding point to the current zero point, so that the radiation pattern corresponding to the first resonance mode is complementary to the radiation pattern corresponding to the second resonance mode.

[0012] The above-mentioned electronic device has at least the following beneficial effects:

[0013] By adding a second grounding point on the radiator and providing a first tuning circuit between the second grounding point and the metal floor, when the radiator is coupled with the metal floor under the excitation of the feed source, based on the tuning action of the first tuning circuit, the current distribution on the radiator is adjusted so that the radiator operates in any one of the first resonance mode and the second resonance mode of the preset frequency band. The current distribution in the first resonance mode is from the feeding point to the second end of the radiator, and the current distribution in the second resonance mode is from the first grounding point to the current zero point on the radiator, and from the second grounding point to the current zero point. Under the two different current distributions, the directional diagrams of the first resonance mode and the second resonance mode are complementary, and multi-directional communication in the preset frequency band can be achieved without adding parasitic branches. While ensuring the communication quality, the miniaturization design of the antenna is taken into account. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 One of the structural schematic diagrams of an electronic device according to one or more embodiments;

[0016] Figure 2 The second structural schematic diagram of the electronic device according to one or more embodiments;

[0017] Figure 3 The third structural diagram of the electronic device of one or more embodiments;

[0018] Figure 4 A fourth structural diagram of an electronic device according to one or more embodiments;

[0019] Figure 5 A fifth structural diagram of an electronic device according to one or more embodiments;

[0020] Figure 6 is a schematic diagram of the structure of a matching circuit included in a tuning circuit in one or more embodiments;

[0021] Figure 7 S parameters and efficiencies of the first resonant mode and the second resonant mode in one embodiment;

[0022] Figure 8a is a directional diagram of the electronic device in a YZ plane in a first resonance mode in one embodiment;

[0023] Figure 8bFor an embodiment, the radiation pattern of the electronic device in the XZ plane in the first resonance mode;

[0024] Figure 9a For an embodiment, the radiation pattern of the electronic device in the YZ plane in the second resonance mode;

[0025] Figure 9b For an embodiment, the radiation pattern of the electronic device in the XZ plane in the second resonance mode;

[0026] Figure 10a For an embodiment, when the electronic device is held horizontally in the right hand with one hand, the radiation pattern in the XY plane in the first resonance mode;

[0027] Figure 10b For an embodiment, when the electronic device is held horizontally in the right hand with one hand, the radiation pattern in the XY plane in the second resonance mode;

[0028] Figure 11 A two-dimensional plan view of the enhancement effect of the radiation pattern of the first resonance mode on the radiation pattern of the second resonance mode;

[0029] Figure 12a For an embodiment, when the electronic device is held horizontally with both hands, the radiation pattern in the XY plane in the first resonance mode;

[0030] Figure 12b For an embodiment, when the electronic device is held horizontally with both hands, the radiation pattern in the XY plane in the second resonance mode. Detailed implementation manners

[0031] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0033] It can be understood that the terms "first", "second", etc. used in this application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, the first resistor can be called the second resistor, and similarly, the second resistor can be called the first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0034] It can be understood that for the "connection" in the following embodiments, if there is a transfer of electrical signals or data between the connected circuits, modules, units, etc., it should be understood as "electrically connected", "communicatively connected", etc.

[0035] It can be understood that "at least one" means one or more, and "a plurality" means two or more. "At least a part of an element" means a part or all of the element.

[0036] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprise / include" or "have" etc. specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the related listed items.

[0037] In one embodiment, an electronic device 100 is provided, as Figure 1 shown, including: a metal floor 10, a feed source S, a radiator 20, and a first tuning circuit 30.

[0038] Wherein, the radiator 20 has a first end and a second end, and a first grounding point D1, a feeding point K connected to the feed source S, and a second grounding point D2 are sequentially and spaced apart between the first end and the second end of the radiator 20. The first grounding point D1 is connected to the metal floor 10. The first tuning circuit 30 is respectively connected to the second grounding point D2 and the metal floor 10. When the radiator 20 is coupled to the metal floor 10 under the excitation of the feed source S, the first tuning circuit 30 tunes the radiator 20 so that the radiator 20 operates in any one of a first resonance mode and a second resonance mode in a preset frequency band.

[0039] The current distribution in the first resonance mode is from the feeding point K to the second end of the radiator 20, and the current distribution in the second resonance mode is from the first grounding point D1 to the current zero point on the radiator 20, and from the second grounding point D2 to the current zero point, so that the radiation pattern corresponding to the first resonance mode is complementary to the radiation pattern corresponding to the second resonance mode.

[0040] Among them, the radiator 20 can be one of a flexible printed circuit (FPC) antenna radiator 20, a laser direct structuring (LDS) antenna radiator 20, a print direct structuring (PDS) antenna radiator 20, and a metal radiation stub. The first tuning circuit 30 may include at least one of an inductor, a capacitor, and a resistor, or a combination of multiple ones. In the embodiments of the present application, the device type of the resonant devices included in the first tuning circuit 30 and the connection relationship between the devices are not further limited.

[0041] Specifically, for the electronic device 100 provided in the embodiments of the present application, by adding a second grounding point D2 to the radiator 20 and providing a first tuning circuit 30 between the second grounding point D2 and the metal floor 10, when the radiator 20 is coupled to the metal floor 10 under the excitation of the feed source S, based on the tuning effect of the first tuning circuit 30, the current distribution on the radiator 20 is adjusted so that the radiator 20 operates in any one of the first resonance mode and the second resonance mode in a preset frequency band. The current distribution in the first resonance mode is from the first grounding point D1 to the second grounding point D2, and the current distribution in the second resonance mode is from the first grounding point D1 to the current zero point on the radiator 20, and from the second grounding point D2 to the current zero point. Under the two different current distributions, the radiation patterns of the first resonance mode and the second resonance mode are complementary. Without adding parasitic stubs, multi-directional communication in a preset frequency band can be achieved, while ensuring communication quality and taking into account the miniaturized design of the antenna.

[0042] See Figure 1 , in the first resonance mode, the feeding current provided by the feed source S is fed into the radiator 20 from the feeding point K, and is fed on the radiator 20 in the direction of the second end of the radiator 20. When the feeding current flows to the second grounding point D2, since the first tuning circuit 30 is in a high impedance state in the preset frequency band in the first resonance mode, at this time the first tuning circuit 30 is equivalent to an open circuit, and the feeding current continues to be fed to the end, forming an I1 current distribution as shown in Figure 1 That is, in the first resonance mode, the feeding current provided by the feed source S is from the feeding point K on the radiator 20 to the second end of the radiator 20.

[0043] In the second resonance mode, the feeding current provided by the feed source S is fed into the radiator 20 from the feeding point K and is transmitted on the radiator 20. When the feeding current flows to the second grounding point D2, since the first tuning circuit 30 is in a low impedance state in the preset frequency band in the second resonance mode, the feeding current can be fed into the metal floor 10 through the first tuning circuit 30. Since the first grounding point D1 is also connected to the metal floor 10, a current zero point on the radiator 20 is formed, and the current is distributed in the reverse direction. Specifically, as shown inFigure 1 As shown by I2 in [the figure], the feeding current is from the first grounding point D1 to the current zero point on the radiator 20, and from the second grounding point D2 to the current zero point on the radiator 20.

[0044] In one embodiment, the length of the radiator 20 is between 1 / 4 and 1 / 3 of the wavelength corresponding to the preset frequency band.

[0045] Taking the preset frequency band as WIFI 2.4G as an example, when the length of the radiator 20 is between 1 / 4 and 1 / 3 of the wavelength corresponding to the preset frequency band (the wavelength corresponding to WIFI 2.4G is λ = c / f = 3×10 8 m / s ÷ 2.4 GHz = 0.125 m = 125 mm), the length of this radiator 20 can be designed between 30 - 50 mm.

[0046] In one embodiment, the first resonance mode is a quarter - wavelength mode of the current distribution from the feeding point K to the second end of the radiator 20.

[0047] At this time, the electrical length of the radiator 20 matches 1 / 4 of the wavelength corresponding to the preset frequency band. Taking the preset frequency band as WIFI 2.4G as an example, the wavelength λ = c / f = 3×10 8 m / s ÷ 2.4 GHz = 0.125 m = 125 mm, and the electrical length of the radiator 20 should match 1 / 4λ, 1 / 4λ = 125 mm ÷ 4 = 31.25 mm.

[0048] In one embodiment, as Figure 2 shown, the first tuning circuit 30 includes: a first matching circuit 31, a second matching circuit 32, and a switching module 33.

[0049] Among them, the first end of the first matching circuit 31 is connected to the metal floor 10. The first end of the second matching circuit 32 is connected to the metal floor 10, and the resonance parameters of the second matching circuit 32 and the first matching circuit 31 are different. The first end of the switching module 33 is connected to the second grounding point D2, and the second end of the switching module 33 is respectively connected to the second end of the first matching circuit 31 and the second end of the second matching circuit 32.

[0050] Among them, the switching module 33 is used to selectively conduct the second grounding point D2 and the first matching circuit 31 to support the first resonance mode, and the switching module 33 is also used to selectively conduct the second grounding point D2 and the second matching circuit 32 to support the second resonance mode.

[0051] Specifically, when the switching module 33 selects to conduct the second grounding point D2 and the first matching circuit 31, when the feeding current provided by the feed source S is transmitted on the radiator 20 to the second grounding point D2, since the first matching circuit 31 is in a high impedance state in the preset frequency band, at this time the first matching circuit 31 is equivalent to an open circuit, and the feeding current continues to feed the end, forming a current distribution from the feeding point K on the radiator 20 to the second end of the radiator 20, supporting the first resonance mode.

[0052] When the switching module 33 selects to conduct the second grounding point D2 and the second matching circuit 32, when the feeding current provided by the feed source S is transmitted on the radiator 20 to the second grounding point D2, since the second matching circuit 32 is in a low impedance state in the preset frequency band, at this time the feeding current can be fed into the metal floor 10 through the first tuning circuit 30. Since the first grounding point D1 is also connected to the metal floor 10, a circulating current mode between the first grounding point D1 and the second grounding point D2 is formed, and the feeding current is from the first grounding point D1 to the current zero point on the radiator 20, and from the second grounding point D2 to the current zero point on the radiator 20. Under this current distribution, the second resonance mode is supported.

[0053] Due to the difference in the current distributions of the first resonance mode and the second resonance mode, their corresponding radiation patterns in the preset frequency band are also different, and the radiation patterns are complementary to each other. The first resonance mode and the second resonance mode can be switched to match the communication environment in the current communication scenario, for example, to match the incoming wave direction, etc., to ensure the communication quality.

[0054] In one embodiment, as Figure 3 shown, the electronic device 100 further includes a processing circuit 40.

[0055] Among them, the processing circuit 40 is connected to the switching module 33, and the processing circuit 40 is used to control the switching module 33 to select to conduct the second grounding point D2 and one of the first matching circuit 31 and the second matching circuit 32.

[0056] The processing circuit 40 may include one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, etc. The processing circuit 40 is connected to the switching module 33. The processing circuit 40 can control the switching module 33 to select to conduct the second grounding point D2 and the first matching circuit 31. At this time, the electronic device 100 supports the first resonance mode in the preset frequency band. The processing circuit 40 can also control the switching module 33 to select to conduct the second grounding point D2 and the second matching circuit 32. At this time, the electronic device 100 supports the second resonance mode in the preset frequency band. The processing circuit 40 can control the gating state of the switching module 33 according to the communication requirements of the current communication scenario to switch between the first resonance mode and the second resonance mode to ensure the communication quality.

[0057] In one embodiment, the processing circuit 40 may be a microprocessor, a microcontroller, a digital signal processor, a baseband processor, a power management unit, an audio codec chip, an application specific integrated circuit, etc. that support other functions in the electronic device 100. By reusing the processing circuit 40 to implement the resonant mode switching, the high-quality communication and miniaturized design of the electronic device 100 can be taken into account without adding extra components.

[0058] In one embodiment, the processing circuit 40 is further configured to obtain the incoming wave detection result and control the switching module 33 to select and conduct the second grounding point D2 and the target matching circuit. The target matching circuit is a target matching circuit that matches the incoming wave detection result, and the target matching circuit is the first matching circuit 31 or the second matching circuit 32.

[0059] Wherein, the incoming wave detection result may include, but is not limited to, information such as the type, intensity, and source direction of the incoming wave signal. The incoming wave detection result may be determined by the processing circuit 40 through measurement and analysis of characteristic parameters such as the frequency, amplitude, and phase of the signal. The target resonant mode that matches the incoming wave detection result refers to the resonant mode that can make the communication quality of the electronic device 100 optimal in the current communication environment.

[0060] Specifically, the processing circuit 40 obtains the incoming wave detection result, and then controls the switching module 33 to select and conduct the second grounding point D2 and the target matching circuit. Optionally, a mapping relationship between the first resonant mode and the second resonant mode and the corresponding incoming wave detection results may be established and stored in the processing circuit 40.

[0061] If the target matching circuit is the first matching circuit 31, the switching module 33 connects the second grounding point D2 and the first matching circuit 31. Since the first matching circuit 31 is in a high impedance state in the preset frequency band, when the feeding current provided by the feed source S is transmitted on the radiator 20 to the second grounding point D2, it will not be fed into the metal floor 10 through the first matching circuit 31, but will continue to be transmitted to the second end of the radiator 20, forming a current distribution from the self-feeding point K to the second end of the radiator 20 to support the first resonant mode.

[0062] If the target matching circuit is the second matching circuit 32, the switching module 33 conducts the second ground point D2 to the second matching circuit 32. Since the second matching circuit 32 is in a low-impedance state in the preset frequency band, when the feeding current provided by the feed source S is transmitted to the second ground point D2 on the radiator 20, it is fed into the metal floor 10 through the second matching circuit 32. Affected by the metal floor 10, a current distribution pattern is formed with a current zero point from the first ground point D1 to the radiator 20 and a current zero point from the second ground point D2 to the radiator 20, supporting the radiator 20 to operate in the second resonance mode. Under different current distributions, the radiation patterns are complementary, which can support the electronic device 100 to perform direction matching with signals in different incoming wave directions and improve the communication quality.

[0063] In one embodiment, the switching module 33 is a switching switch, specifically an electronic switching switch. The electronic switching switch has a small volume, which is beneficial for integration into the electronic device 100.

[0064] In one embodiment, the preset frequency band includes the WiFi communication frequency band. The WiFi communication frequency band can be any one or more frequency bands under WiFi7. For example, the WiFi communication frequency band can include the WiFi 2.4G frequency band and the WiFi 5G frequency band.

[0065] Among them, the WiFi 5G frequency band has a wide bandwidth and can provide a higher data transmission rate, which is suitable for scenarios with extremely high network speed requirements, such as 4K video stream transmission, large file rapid download and other application scenarios.

[0066] In one embodiment, the preset frequency band includes the WiFi 2.4G frequency band. In the WiFi 2.4G frequency band, the signal propagation distance is relatively far, and it can better penetrate obstacles such as walls. It can be applied in complex environments such as homes and offices.

[0067] In one embodiment, the inductance value of the first matching circuit 31 is greater than the inductance value of the second matching circuit 32, and / or the capacitance value of the first matching circuit 31 is less than the capacitance value of the second matching circuit 32.

[0068] Among them, the first matching circuit 31 adopts a large inductor and / or a small capacitor, which can support a high inductive reactance and a low capacitive reactance in the WiFi communication frequency band, so that the grounding path where the first matching circuit 31 is located has a higher impedance in the WiFi communication frequency band, forcing the feeding current to continue feeding the second end of the radiator 20 when flowing through the second ground point D2, so as to form a current distribution from the feeding point K to the second end of the radiator 20 and support the first resonance mode.

[0069] The second matching circuit 32 uses small inductors and / or large capacitors, which can support low inductive reactance and high capacitive reactance in the WiFi communication frequency band, making the grounding path where the second matching circuit 32 is located present low impedance in the WiFi communication frequency band. When the feeding current flows through the second grounding point D2, it is fed into the metal floor 10 through the second matching circuit 32, continues to be transmitted on the metal floor 10 to the first grounding point D1, and is re-fed into the radiator 20 to form a current distribution with a current zero point from the first grounding point D1 to the radiator 20 and a current zero point from the second grounding point D2 to the radiator 20, supporting the second resonance mode.

[0070] In one embodiment, as Figure 1 shown, the first grounding point D1 is located at the first end, the second grounding point D2 is located at the second end, the feeding point K is located between the first end and the second end of the radiator 20, and the feeding point K is close to the first end of the radiator 20.

[0071] Referring to Figure 1 , in the first resonance mode, since the feeding point K is arranged close to the first end of the radiator 20, most of the part between the first end and the second end of the radiator 20 can be used to support the first resonance mode, and the size utilization rate of the radiator 20 is high.

[0072] Referring to Figure 1 , in the second resonance mode, since the first grounding point D1 is located at the first end of the radiator 20 and the second grounding point D2 is located at the second end of the radiator 20, the current zero point from the first grounding point D1 to the radiator 20 is equivalent to the current zero point from the first end of the radiator 20 to the radiator 20, and the current zero point from the second grounding point D2 to the radiator 20 is equivalent to the current zero point from the second end of the radiator 20 to the radiator 20, and the size utilization rate of the radiator 20 is high.

[0073] Therefore, with the above distribution of the first grounding point D1, the second grounding point D2 and the feeding point K, the size utilization rate of the radiator 20 can be improved in both the first resonance mode and the second resonance mode. In the case of realizing communication in the same frequency band, the required size of the radiator 20 is smaller, which is beneficial to the miniaturization design of the electronic device 100.

[0074] In one embodiment, there are multiple preset frequency bands. As Figure 4 shown, the electronic device 100 further includes a second tuning circuit 50.

[0075] Among them, the second tuning circuit 50 is respectively connected to the feed source S and the feeding point K. The second tuning circuit 50 is used to tune the radiator 20 so that the radiator 20 operates in the target frequency band, and the target frequency band is one of the multiple preset frequency bands.

[0076] Specifically, when the feed source S provides the feeding current corresponding to the target frequency band, the second tuning circuit 50 is adjusted to support the passing of the feeding current corresponding to the target frequency band. The feeding current provided by the feed source S is fed into the radiator 20 via the second tuning circuit 50 and propagates on the radiator 20 to support communication in the target frequency band.

[0077] The resonance parameters of the second tuning circuit 50 are adjustable. By adjusting the resonance parameters, it can correspondingly support the passing of the feeding currents corresponding to different preset frequency bands, thereby realizing multi-band communication. Without increasing the radiator 20, not only can multi-resonance mode switching be realized based on the first tuning circuit 30, but also multi-band communication switching can be realized based on the second tuning circuit 50. With the combined action of the two, multi-directional communication in multiple preset frequency bands can be realized.

[0078] In one embodiment, as Figure 5 shown, in the case of including the processing circuit 40, the processing circuit 40 is connected to the second tuning circuit 50, and the processing circuit 40 is used to adjust the resonance parameters of the second tuning circuit 50 so that the radiator 20 operates in the target frequency band.

[0079] Specifically, the processing circuit 40 can adjust the resonance parameters of the second tuning circuit 50 according to the preset frequency band corresponding to the feeding current provided by the feed source S, so that the resonance parameters of the second tuning circuit 50 match the feeding current provided by the feed source S, support the passing of the feeding current, and support the preset frequency band corresponding to the feeding current, realizing multi-band communication.

[0080] For example, in a wireless communication scenario with a high requirement for signal propagation distance, the feed source S can provide the feeding current corresponding to the WiFi 2.4G frequency band, and the processing circuit 40 can adjust the resonance frequency point of the second tuning circuit 50 to 2.4 GHz to support the flowing of the feeding current in this frequency band and feed it into the radiator 20. During the propagation of the feeding current on the radiator 20, communication in the WiFi 2.4G frequency band is supported.

[0081] In the WiFi 2.4G frequency band communication scenario, the processing circuit 40 can further adjust the resonance parameters of the first tuning circuit 30 according to the incoming wave detection result to switch between the first resonance mode and the second resonance mode, ensuring the best communication quality for users in the current communication scenario.

[0082] For another example, in a wireless communication scenario with a high requirement for signal data transmission rate, the feed source S can provide the feeding current corresponding to the WiFi 5G frequency band, and the processing circuit 40 can adjust the resonance frequency point of the second tuning circuit 50 to 5 GHz to support the flowing of the feeding current in this frequency band and feed it into the radiator 20. During the propagation of the feeding current on the radiator 20, communication in the WiFi 5G frequency band is supported.

[0083] In the communication scenario of the WiFi 5G frequency band, the processing circuit 40 can further adjust the resonance parameters of the first tuning circuit 30 according to the incoming wave detection result, so as to switch between the first resonance mode and the second resonance mode, ensuring to provide the optimal communication quality for users in the current communication scenario.

[0084] In one embodiment, the tuning circuit (including the first tuning circuit 30 and the second tuning circuit 50) in the embodiment of the present application has a first end and a second end. The first end of the first tuning circuit 30 is connected to the metal floor 10, and the second end of the first tuning circuit 30 is connected to the second grounding point D2. The first end of the second tuning circuit 50 is connected to the feed source S, and the second end of the second tuning circuit 50 is connected to the feeding point K.

[0085] Between the first end and the second end of the first tuning circuit 30, and between the first end and the second end of the second tuning circuit 50, at least one of the following matching circuits as Figure 6 shown may be included:

[0086] Series-connected capacitor C1 and inductor L1 ( Figure 6 as shown in a);

[0087] Parallel-connected capacitor C2 and inductor L2 ( Figure 6 as shown in b);

[0088] Capacitor C3, capacitor C4 and inductor L3, where capacitor C3 and inductor L3 are in parallel and then in series with capacitor C4 ( Figure 6 as shown in c);

[0089] Capacitor C5, inductor L4 and inductor L5, where capacitor C5 and inductor L4 are in parallel and then in series with inductor L4 ( Figure 6 as shown in d);

[0090] Capacitor C6, capacitor C7 and inductor L6, where capacitor C6 and inductor L6 are in series and then in parallel with capacitor C7 ( Figure 6 as shown in e);

[0091] Capacitor C8, inductor L7 and inductor L8, where inductor L7 and capacitor C8 are in series and then in parallel with inductor L8 ( Figure 6 as shown in f);

[0092] Capacitor C9, capacitor C10, inductor L9, inductor L10, where capacitor C9 and inductor L9 are in parallel, capacitor C10 and inductor L10 are in parallel, and the parallel-connected capacitor C9 and inductor L9 are in series with the parallel-connected capacitor C10 and inductor L10 ( Figure 6 as shown in g);

[0093] Capacitor C11, capacitor C12, inductor L11 and inductor L12. Capacitor C11 and inductor L11 are connected in series, capacitor C12 and inductor L12 are connected in series, and the series-connected capacitor C11 and inductor L11 are in parallel with the series-connected capacitor C12 and inductor L12 ( Figure 6 as shown in h).

[0094] To better illustrate the implementation process of the electronic device 100 provided in the embodiments of the present application, for example, taking the preset frequency band as the WiFi 2.4G frequency band, under the architecture as shown in Figure 4 the electronic device 100 is tested:

[0095] The S-parameters and efficiency of the first resonance mode and the second resonance mode are as shown in Figure 7 It can be seen from the figure that the efficiency in the two modes is basically the same, but due to the different current modes, their radiation patterns will be quite different. The radiation pattern in the first resonance mode is as shown in Figure 8a - Figure 8b and the radiation pattern in the second resonance mode is as shown in Figure 9a - Figure 9b The radiation pattern in the first resonance mode has good coverage in the top area of the electronic device 100 and is weak at the bottom; the radiation pattern in the second resonance mode has good coverage in the bottom area and is weak at the top. The radiation patterns in the two resonance modes can be complementary to ensure communication quality by switching the resonance mode in different communication environments.

[0096] In one embodiment, the electronic device 100 includes a top frame, a first side frame, a bottom frame, and a second side frame connected end to end in sequence; the radiator 20 is disposed on the top frame.

[0097] As shown in Figure 8a - Figure 8b , and Figure 9a - Figure 9b when the radiator 20 is disposed on the top frame of the electronic device 100, the communication quality is high in the top area of the electronic device 100 in the first resonance mode, and the communication quality is good in the bottom area of the electronic device 100 in the second resonance mode. When the incoming wave signal comes from the top direction, it can be switched to the first resonance mode to ensure communication quality. Similarly, when the incoming wave signal comes from the bottom direction, it can be switched to the second resonance mode to ensure communication quality.

[0098] Of course, it can also be default to work in the first resonance mode or the second resonance mode. By detecting the RSRP (Reference Signal Receiving Power) or SINR (Signal to Interference plus Noise Ratio) value, when the detected RSRP is less than the RSRP 阈值 (a threshold value representing poor communication quality) and / or the detected SINR is less than the SINR阈值 When (a threshold value representing poor communication quality) is reached, switch to another mode other than the default resonance mode. For example, if the default operating mode is the first resonance mode, when the detected RSRP is less than the RSRP 阈值 and / or the detected SINR is less than the SINR 阈值 switch to the second resonance mode. Similarly, if the default operating mode is the second resonance mode, then when the detected RSRP is less than the RSRP 阈值 and / or the detected SINR is less than the SINR 阈值 switch to the first resonance mode. By real-time detection of signals, for example, detecting the RSRP or SINR value, real-time adaptive switching of the switching module 33 can be achieved, so as to achieve a larger coverage of the radiation pattern.

[0099] In a test case, as Figure 10a and Figure 10b shown, when the electronic device 100 is held in the right hand, the radiation patterns of the first resonance mode and the second resonance mode still have good complementarity.

[0100] In many environments, the incoming wave of the signal has obvious directivity. When the electronic device 100 is used in landscape mode, for example, in the scenario of holding the mobile phone's USB port in the right hand to watch a video, if the direction of the incoming signal is from the top direction of the mobile phone, the switching module 33 selects the second grounding point D2 and the first matching circuit 31 to make the radiator 20 in the first resonance mode. At this time, the radiation pattern in the top direction is stronger; if the direction of the incoming signal is from the bottom direction of the mobile phone, the switching module 33 selects the second grounding point D2 and the second matching circuit 32 to make the radiator 20 in the second resonance mode. At this time, the radiation pattern at the bottom of the electronic device 100 is stronger.

[0101] Figure 11 The two-dimensional plan view of the enhancement effect of the radiation pattern in the first resonance mode on the radiation pattern in the second resonance mode is given. The upper left figure represents the enhancement effect of the radiation pattern in the first resonance mode on the radiation pattern in the second resonance mode. Based on this figure, it can be seen that the improvement is more than 4 dB in the theta = 0 - 50° region. The first resonance mode is stronger in the theta = 0 - 50° region, while the second resonance mode is stronger in the theta = 120 - 170° region. The lower right figure represents the combined (taking the larger value in all directions) radiation pattern of the two resonance modes. It can be seen that the combined radiation pattern has good omnidirectionality.

[0102] In one embodiment, there are multiple radiators 20, and at least one radiator 20 is also provided on the first side frame or the second side frame.

[0103] By providing radiators 20 on both the side frame and the top frame, both portrait and landscape application scenarios can be accommodated. In the landscape application scenario, if the electronic device 100 is held with both hands, the hands will block the radiator 20 at the top frame position, which will greatly affect its communication quality. However, at this time, as Figure 12a - Figure 12b shown, when only the radiator 20 on the side frame is working, the radiation patterns in the first resonance mode and the second resonance mode still have good complementarity.

[0104] Taking the position of the radiator 20 provided in the Figure 12a frame shown as an example, it can be seen from Figure 12a and Figure 12b that the radiation pattern in the first resonance mode mainly points to the upper left, while the radiation pattern in the second resonance mode mainly points to the screen side and the back side. The radiation patterns in the two resonance modes have good complementarity, and different communication requirements in different directions can be met by switching the resonance modes.

[0105] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0106] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0107] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An electronic device, characterized in that: include: Metal flooring; Feeds; A radiator, the radiator having a first end and a second end, a first grounding point, a feeding point connected to the feed source, and a second grounding point are sequentially spaced between the first end and the second end of the radiator, and the first grounding point is connected to the metal floor; a first tuning circuit connected to the second grounding point and the metal floor respectively; When the radiator is coupled with the metal floor under the excitation of the feed source, the first tuning circuit tunes the radiator so that the radiator operates in any one of a first resonance mode and a second resonance mode in a preset frequency band; The current distribution in the first resonance mode is from the feeding point to the second end of the radiator, and the current distribution in the second resonance mode is from the first grounding point to the current zero point on the radiator, and from the second grounding point to the current zero point, so that the radiation pattern corresponding to the first resonance mode is complementary to the radiation pattern corresponding to the second resonance mode.

2. The electronic device according to claim 1, characterized in that: The first tuning circuit comprises: a first matching circuit, wherein a first end of the first matching circuit is connected to the metal floor; a second matching circuit, wherein a first end of the second matching circuit is connected to the metal floor, and the second matching circuit and the first matching circuit have different resonance parameters; a switching module, wherein a first end of the switching module is connected to the second grounding point, and a second end of the switching module is respectively connected to a second end of the first matching circuit and a second end of the second matching circuit; The switching module is used to select and conduct the second grounding point and the first matching circuit to support the first resonance mode, and the switching module is also used to select and conduct the second grounding point and the second matching circuit to support the second resonance mode.

3. The electronic device according to claim 2, characterized in that: The electronic device further comprises: A processing circuit is connected to the switching module, and is used to control the switching module to select and conduct the second grounding point with one of the first matching circuit and the second matching circuit.

4. The electronic device according to claim 3, characterized in that: The processing circuit is also used to obtain an incoming wave detection result, and control the switching module to select and conduct the second grounding point and the target matching circuit; the target matching circuit is a target matching circuit that matches the incoming wave detection result, and the target matching circuit is the first matching circuit or the second matching circuit.

5. The electronic device according to claim 2, characterized in that: The preset frequency band includes a WiFi communication frequency band.

6. The electronic device according to claim 5, characterized in that: The inductance value of the first matching circuit is greater than the inductance value of the second matching circuit, and / or the capacitance value of the first matching circuit is less than the capacitance value of the second matching circuit.

7. The electronic device according to claim 1, characterized in that: The first grounding point is located at the first end of the radiator, the second grounding point is located at the second end of the radiator, the feeding point is located between the first end and the second end of the radiator, and the feeding point is close to the first end of the radiator.

8. The electronic device according to any one of claims 1 to 7, characterized in that: There are multiple preset frequency bands, and the electronic device further includes: A second tuning circuit is connected to the feed source and the feeding point respectively, and the second tuning circuit is used to tune the radiator so that the radiator works in a target frequency band, and the target frequency band is one of the multiple preset frequency bands.

9. The electronic device according to claim 8, characterized in that: In the case of including a processing circuit, the processing circuit is connected to the second tuning circuit, and the processing circuit is used to adjust the resonance parameters of the second tuning circuit so that the radiator operates in the target frequency band.

10. The electronic device according to claim 1, characterized in that: The electronic device comprises a top frame, a first side frame, a bottom frame and a second side frame connected end to end in sequence; The radiator is arranged on the top frame.

11. The electronic device according to claim 10, characterized in that: There are multiple radiators, and at least one of the radiators is also arranged on the first side frame or the second side frame.

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