Antenna devices and electronic devices

Abstract

The present application relates to an antenna device and an electronic device. The antenna device includes: a first radiator, a second radiator, a first feed source, a second feed source, a first tuning circuit, and a second tuning circuit, with a gap provided between the first radiator and the second radiator; wherein the first radiator is provided with a first feeding point, a first grounding point, and a second grounding point; the first end of the first tuning circuit is connected to the first grounding point, and the second end of the first tuning circuit is grounded; the second radiator is provided with a second feeding point, a third grounding point, and a fourth grounding point, the first end of the second tuning circuit is connected to the third grounding point, and the second end of the tuning circuit is grounded; the first feed source feeds a first feeding signal to the first radiator through the first feeding point; the second feed source feeds a second feeding signal to the second radiator through the second feeding point. The above antenna device can achieve ultra-wideband coverage with fewer antenna radiators.

Description

Technical Field

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

[0002] With the development and progress of science and technology, communication technology has developed rapidly and made great progress. With the improvement of communication technology, the popularity of electronic products has reached an unprecedented level, and more and more terminals such as mobile phones, smart TVs and computers have become an indispensable part of people's lives.

[0003] Terminal devices are increasingly moving towards full-screen and ultra-thin designs, and the antenna environment is becoming increasingly harsh, resulting in increasingly unsatisfactory antenna performance. Existing antennas are unable to achieve wide-band coverage. Summary of the Invention

[0004] The embodiments of the present application provide an antenna device and an electronic device, which can achieve ultra-wideband coverage with fewer antenna radiators.

[0005] In a first aspect, the present application provides an antenna device, comprising: a first radiator, a second radiator, a first feed source, a second feed source, a first tuning circuit, and a second tuning circuit, wherein a gap is provided between the first radiator and the second radiator;

[0006] The first radiator is provided with a first feeding point, a first grounding point, and a second grounding point, wherein the first grounding point is located between the first feeding point and the second grounding point and is grounded through the first tuning circuit, the first feeding point is located on a side of the first radiator close to the second radiator, and the second grounding point is located on a side of the second radiator away from the second radiator and is grounded;

[0007] The second radiator is provided with a second feeding point, a third grounding point, and a fourth grounding point, the third grounding point being located between the second feeding point and the fourth grounding point and being grounded through the second tuning circuit, the second feeding point being located on a side of the second radiator close to the first radiator, and the fourth grounding point being located on a side of the second radiator away from the first radiator and being grounded;

[0008] The first feed source feeds a first feed signal to the first radiator through the first feeding point to excite the first radiator to generate a first resonant mode supporting a first frequency band; the second radiator is capacitively coupled to the first radiator through the gap and generates a third resonant mode supporting a second frequency band under the tuning action of the second tuning circuit;

[0009] The second feed source feeds a second feed signal to the second radiator through the second feeding point to excite the second radiator to generate a fourth resonant mode supporting the third frequency band. The first radiator is capacitively coupled with the second radiator through the gap and, under the tuning action of the first tuning circuit, generates a second resonant mode supporting the fourth frequency band.

[0010] In a second aspect, the present application provides an electronic device comprising the antenna device as described above.

[0011] The above-mentioned antenna device and electronic device, by providing a first feeding point on the first radiator, allows the first feed source to feed a first feed signal to the first radiator through the first feeding point. By controlling the operating states of the first tuning circuit and the second tuning circuit, the first radiator can be stimulated to generate a first resonant mode supporting the first frequency band, and the second radiator can act as a parasitic branch to generate a third resonant mode supporting the second frequency band, thereby enabling different radiators to support different frequency bands, thereby expanding the frequency band covered by the antenna device. In addition, by providing a second feeding point on the second radiator, the second feed source can feed a second feed signal to the second radiator through the second feeding point. By controlling the operating states of the first tuning circuit and the second tuning circuit, the second radiator can be stimulated to generate a fourth resonant mode supporting the third frequency band, and the first radiator can act as a parasitic branch to generate a second resonant mode supporting the fourth frequency band, further expanding the frequency band covered by the antenna device. Thus, it is possible to achieve wider bandwidth coverage using fewer antenna radiators, thereby improving the performance of the antenna device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. 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 paying any creative work.

[0013] Figure 1 is a structural schematic diagram of an antenna device in one embodiment;

[0014] Figure 2 is a structural schematic diagram of an antenna device in another embodiment;

[0015] Figure 3 A schematic structural diagram of an antenna device in yet another embodiment;

[0016] Figure 4 is a structural schematic diagram of an antenna device in yet another embodiment;

[0017] Figure 5 is a structural schematic diagram of an antenna device in yet another embodiment;

[0018] Figure 6 is a structural schematic diagram of an antenna device in yet another embodiment;

[0019] Figure 7 is a schematic diagram of S parameters of an antenna device in a low frequency band according to an embodiment;

[0020] Figure 8 is a schematic diagram of S parameters of an antenna device in a medium and high frequency band in one embodiment;

[0021] Figure 9 is a schematic diagram of the antenna efficiency of an antenna device in a low frequency band according to an embodiment;

[0022] Figure 10 is a schematic diagram of the antenna efficiency of an antenna device in a medium and high frequency band according to an embodiment;

[0023] Figure 11 is a schematic structural diagram of an electronic device in one embodiment;

[0024] Figure 12 is a schematic structural diagram of an electronic device in another embodiment;

[0025] Figure 13 FIG. 1 is a block diagram of the internal structure of an electronic device in one embodiment.

[0026] Description of reference numerals:

[0027] 11-first radiator, 12-second radiator, 21-first tuning circuit, 22-second tuning circuit, 221-first tuning switch, 222-second tuning switch, 31-first matching circuit, 32-second matching circuit, 33-third matching circuit, 34-fourth matching circuit, 40-electronic device, 41-conductive frame, 4101-top frame, 4102-first side frame, 4103-bottom frame, 4104-second side frame, 42-display screen, 43-motherboard, 50-mobile phone, 51-memory, 511-operating system, 512-communication module, 513-GPS module, 52-processing circuit, 53-I / O subsystem, 531-button, 54-antenna device, 55-signal line. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0030] It will be understood that the terms "first," "second," and the like used herein may be used to describe various elements herein, but these elements are not limited by these terms. These terms are used solely to distinguish a first element from another element. For example, a first feed may be referred to as a second feed, and similarly, a second feed may be referred to as a first feed, without departing from the scope of this application. The first feed and the second feed are both feeds, but they are not the same feed.

[0031] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0032] When used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0033] The antenna devices involved in the embodiments of the present application can be applied to electronic devices with wireless communication functions, such as handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., mobile phones), mobile stations (MS), etc. For ease of description, the above-mentioned devices are collectively referred to as electronic devices.

[0034] In one embodiment, Figure 1 As shown, the present application provides an antenna device. The antenna device includes: a first radiator 11, a second radiator 12, a first feed S1, a second feed S2, a first tuning circuit 21, and a second tuning circuit 22. A gap is provided between the first radiator 11 and the second radiator 12. The gap can be equivalent to a capacitor to enable capacitive coupling between the first radiator 11 and the second radiator 12. The size of the gap is determined according to actual needs and is not specifically limited here. The first feed S1 and the second feed S2 can be devices that generate feed signals (or excitation signals).

[0035] The first radiator 11 is provided with a first feeding point K1, a first grounding point G1, and a second grounding point G2. The first grounding point G1 is located between the first feeding point K1 and the second grounding point G2. The first feeding point K1 is located on a side of the first radiator 11 that is close to the second radiator 12. The second grounding point G2 is located on a side of the second radiator 12 that is away from the second radiator 12 and is grounded. For example, if the antenna device is used in an electronic device, the first grounding point G1 and the second grounding point G2 can be respectively connected to the ground layer of the motherboard of the electronic device.

[0036] A first end of the first tuning circuit 21 is connected to the first ground point G1 , a second end of the first tuning circuit 21 is grounded, and the first tuning circuit 21 is used to selectively conduct a first tuning path between the first ground point G1 and the common ground.

[0037] It is understood that when the first tuning circuit 21 is turned on, the first grounding point G1 is grounded. In the embodiment of the present application, the antenna device can excite different resonant modes depending on the conduction state of the first tuning path between the first grounding point G1 and the common ground.

[0038] The first tuning circuit 21 may include a first switch unit, which may be a single-pole single-throw switch (SPST) for example, connected to the third ground point G3, and the other end of the first switch unit is connected to the common ground.

[0039] The second radiator 12 is provided with a second feeding point K2, a third grounding point G3, and a fourth grounding point G4. The third grounding point G3 is located between the second feeding point K2 and the fourth grounding point G4. The second feeding point K2 is located on the side of the second radiator 12 closest to the first radiator 11. The fourth grounding point G4 is located on the side of the second radiator 12 away from the first radiator 11 and is grounded. For example, if the antenna device is used in an electronic device, each of the grounding points Gn can be connected to the ground layer of the motherboard of the electronic device.

[0040] The first end of the second tuning circuit 22 is connected to the third ground point G3, and the second end of the tuning circuit is grounded. The tuning circuit is configured to selectively conduct a second tuning path between the third ground point G3 and a common ground. It will be appreciated that when the second tuning circuit 22 is conducting, the third ground point G3 is grounded. In the embodiment of the present application, different resonant modes can be excited by the antenna device depending on the conduction state of the second tuning path between the third ground point G3 and the common ground.

[0041] The second tuning circuit 22 may include a second switch unit, which may be a single-pole single-throw switch SPST, one end of which is connected to the third ground point G3 and the other end of which is connected to the common ground.

[0042] The first feed source S1 feeds a first feed signal to the first radiator 11 through the first feeding point K1 to stimulate the first radiator 11 to generate a first resonant mode supporting the first frequency band. The second radiator 12 is capacitively coupled with the first radiator 11 through the gap, and under the tuning action of the second tuning circuit, generates a third resonant mode supporting the second frequency band. It should be noted that the third resonant mode is mainly contributed by the resonant current on the second radiator, and a small amount of resonant current is also accompanied by the first radiator. In the embodiment of the present application, for the sake of convenience, the antenna corresponding to the first radiator 11 supporting the first frequency band and the second radiator 12 supporting the second frequency band can be referred to as the first antenna. It can be understood that the first antenna can support both the first frequency band and the second frequency band.

[0043] The second feed source S2 feeds a second feed signal to the second radiator 12 through the second feeding point K2 to stimulate the second radiator 12 to generate a fourth resonant mode supporting the third frequency band. The first radiator 11 is capacitively coupled with the second radiator 12 through the gap to generate a second resonant mode supporting the fourth frequency band. It should be noted that the second resonant mode is mainly contributed by the resonant current on the first radiator, and a small amount of resonant current is also accompanied by the second radiator. In the embodiment of the present application, for the sake of convenience, the antenna corresponding to the second radiator 12 supporting the third frequency band and the first radiator 11 supporting the fourth frequency band can be referred to as the second antenna. It can be understood that the second antenna can support both the third frequency band and the fourth frequency band.

[0044] It should be noted that the first radiator 11 supporting the first frequency band can be understood as the first radiator 11 being capable of receiving RF signals in the first frequency band, or the first radiator 11 being capable of transmitting RF signals in the first frequency band, or the first radiator 11 being capable of both receiving and transmitting RF signals in the first frequency band. Similarly, the second radiator 12 capacitively coupling with the first radiator 11 via a slot to support the second frequency band; the second radiator 12 supporting the third frequency band; and the first radiator 11 capacitively coupling with the second radiator 12 via a slot to support the fourth frequency band can also be understood in the same manner and will not be further elaborated here.

[0045] Among them, the first frequency band, the second frequency band, the third frequency band and the fourth frequency band are different. Exemplarily, the frequency range covered by the first frequency band, the frequency range covered by the second frequency band, the frequency range covered by the third frequency band and the frequency range covered by the fourth frequency band are different. In this embodiment, the first frequency band and the second frequency band can be different sub-bands of the low frequency (Low Band, LB) frequency band, and the range of the LB frequency band is lower than 1000MHz. Among them, the radio frequency signal of the low frequency band can include part or all of the radio frequency signals of the low frequency band of 4G-LTE and 5G-NR. The third frequency band and the fourth frequency band are different sub-bands of the middle and high frequency (Middle High Band, MHB) frequency band, and the MHB frequency band range is 1000MHz-3000MHz. Among them, the radio frequency signal of MHB may include radio frequency signals of part or all medium and high frequency bands of 4G Long Term Evolution (LTE) and 5G NR. For example, it may include signals of LTE-1 / 2 / 3 / 4 / 7 / 32 / 34 / 38 / 39 / 40 / 41 frequency bands and radio frequency signals of NR-1 / 3 / 7 / 40 / 41 frequency bands.

[0046] Optionally, the first radiator 11 and the second radiator 12 may be one of a flexible printed circuit (FPC) antenna radiator, a laser direct structuring (LDS) antenna radiator, a print direct structuring (PDS) antenna radiator, and a metal radiating branch, respectively. In the embodiment of the present application, there is no further limitation on the radiator type of the first radiator 11 and the second radiator 12, and the types of the first radiator 11 and the second radiator 12 may be the same or different. In the embodiment of the present application, for ease of description, the first radiator 11 and the second radiator 12 are taken as metal radiating branches, such as the conductive frame of an electronic device, for example.

[0047] The antenna device described above provides a first feeding point K1 on the first radiator 11, allowing the first feed source S1 to feed a first feed signal to the first radiator 11 via the first feeding point K1. By controlling the operating states of the first tuning circuit 21 and the second tuning circuit 22, the first radiator 11 can be stimulated to generate a first resonant mode supporting the first frequency band, while the second radiator 12, as a parasitic stub, generates a third resonant mode supporting the second frequency band. This allows different radiators to support different frequency bands, thereby expanding the frequency band covered by the antenna device. Furthermore, by providing a second feeding point K2 on the second radiator 12, the second feed source S2 can be stimulated to feed a second feed signal to the second radiator 12 via the second feeding point K2. By controlling the operating states of the first tuning circuit 21 and the second tuning circuit 22, the second radiator 12 can be stimulated to generate a fourth resonant mode supporting the third frequency band, while the first radiator 11, as a parasitic stub, generates a second resonant mode supporting the fourth frequency band. This further expands the frequency band covered by the antenna device, thereby achieving wider bandwidth coverage with fewer antenna radiators and improving the performance of the antenna device.

[0048] In one embodiment, the first frequency band and the second frequency band are different sub-frequency bands in the low frequency band; the third frequency band and the fourth frequency band are different sub-frequency bands in the middle and high frequency bands.

[0049] It can be understood that since the first feed source S1 feeds a first feed signal to the first radiator 11 through the first feed point K1 to stimulate the first radiator 11 to generate a first resonant mode supporting the first frequency band, the second radiator 12 capacitively couples with the first radiator 11 through the slot to generate a third resonant mode supporting the second frequency band; the second feed source S2 feeds a second feed signal to the second radiator 12 through the second feed point K2 to stimulate the second radiator 12 to generate a fourth resonant mode supporting the third frequency band, and the first radiator 11 capacitively couples with the second radiator 12 through the slot to generate a second resonant mode supporting the fourth frequency band. Since the first and second frequency bands are different sub-bands in the low frequency band, and the third and fourth frequency bands are different sub-bands in the mid-high frequency band, the antenna device of the embodiment of the present application achieves dual-mode coverage in the LB band, and the two modes can be switched completely freely. This can improve the LB band bandwidth and radiation efficiency, and can also achieve the effect of full low-band CA (Carrier Aggregation) coverage. Dual-mode coverage is achieved in the MHB band, and the two modes can be switched completely freely. This can improve the MHB band bandwidth and radiation efficiency, and achieve CA coverage of the entire mid- and high-frequency bands.

[0050] In one embodiment, Figure 2As shown, A is the branch position point corresponding to the second grounding point G2, B is the branch position point corresponding to the first grounding point G1, C is the branch position point corresponding to the first feeding point K1, D is the first free end of the first radiator 11, E is the first free end of the second radiator 12, F is the branch corresponding to the second feeding point K2, G is the branch position point corresponding to the third grounding point G3, and H is the branch position point corresponding to the fourth grounding point G4.

[0051] When the first tuning circuit 21 disconnects the first tuning path between the first ground point G1 and the common ground, the first radiator 11 is excited by the first feeding signal to generate a first resonance mode to radiate a radio frequency signal of the first frequency band.

[0052] It can be understood that when the first tuning circuit 21 disconnects the first tuning path, the first grounding point G1 is disconnected from the common ground, then the first grounding point G1 is not grounded, and the second grounding point G2 is grounded. Therefore, in this case, the second grounding point G2 is the return point of the first feed signal, and the radiation branch between the first free end of the first radiator 11 (the end of the first radiator 11 close to the second radiator 12) and the second grounding point G2, that is, the DA branch, is excited to produce a first resonant mode under the excitation of the first feed signal, and radiates the RF signal of the first frequency band, so that the first radiator 11 can support the first frequency band.

[0053] In one embodiment, Figure 2 As shown, under the excitation of the first feed signal, the radiating branch (DA branch) between the first free end of the first radiator 11 and the second ground point G2 excites a first resonant mode, and the first resonant mode is a quarter-wavelength mode of the DA branch. The first resonant mode is a quarter-wavelength mode of the first radiator 11 corresponding to the first free end of the first radiator 11 to the second ground point G2, and the first free end of the first radiator 11 is the end close to the second radiator 12. In the first resonant mode, the current of the DA branch mainly flows from A (the branch position corresponding to the second ground point G2) to D (the first free end of the first radiator 11), and the antenna device excites a λ / 4 mode of the first frequency band in the DA branch.

[0054] In addition, the second radiator 12 is capacitively coupled to the first radiator 11 through the gap, serving as a parasitic branch to support the second frequency band. The antenna assembly then excites a parasitic mode in the second frequency band on the second radiator 12, thereby expanding the frequency band covered by the antenna assembly. The second feed source S2 can also feed a second feed signal to the second radiator 12 via the second feed point K2, enabling the second radiator 12 to support the third frequency band and the first radiator 11 to serve as a parasitic branch to support the fourth frequency band. This allows for wider bandwidth coverage to be achieved with fewer antenna radiators, thereby improving the performance of the antenna assembly.

[0055] In one embodiment, Figure 2 As shown, when the first tuning circuit 21 turns on the first tuning path, the first radiator 11 is excited by the second feeding signal to generate a second resonance mode to radiate a radio frequency signal in the fourth frequency band.

[0056] When the first tuning circuit 21 conducts the first tuning path, the first grounding point G1 is grounded, serving as the return point for the second feed signal. Under the stimulation of the second feed signal, the branch (DB branch) between the first free end of the first radiator 11 and the first grounding point G1 is excited to generate a second resonant mode, radiating RF signals in the fourth frequency band. This allows the first radiator 11 to function as a parasitic branch supporting the fourth frequency band, thus expanding the frequency band supported by the second antenna.

[0057] In one embodiment, Figure 2 As shown, the second resonant mode is a parasitic mode of the first radiator 11 corresponding to the first free end of the first radiator 11 to the first ground point G1 , and the first free end of the first radiator 11 is an end close to the second radiator 12 .

[0058] Under the excitation of the second feed signal, the branch (DB branch) between the first free end of the first radiator 11 and the first ground point G1 excites a second resonant mode, which is a parasitic mode of the EG branch. In the second resonant mode, the current in the DB branch primarily flows from B (the branch location corresponding to the first ground point G1) to D (the first free end of the first radiator 11). The second antenna excites a parasitic mode in the fourth frequency band in the DB branch, thereby enabling the first radiator 11 to support the fourth frequency band as a parasitic branch, expanding the frequency band supported by the second antenna.

[0059] In one embodiment, Figure 2 As shown, when the second tuning circuit 22 disconnects the second tuning path between the third ground point G3 and the common ground, the second radiator 12 is excited by the first feeding signal to excite the third resonance mode to radiate the radio frequency signal of the second frequency band.

[0060] When the second tuning circuit 22 disconnects the second tuning path, the third ground point G3 is disconnected from the common ground, and the third ground point G3 is ungrounded. The fourth ground point G4 serves as the return point for the first feed signal. Under the excitation of the first feed signal, the branch (EH branch) between the first free end of the second radiator 12 and the fourth ground point G4 is excited to generate a third resonant mode, radiating RF signals in the second frequency band. This allows the second radiator 12 to function as a parasitic branch supporting the second frequency band, thereby expanding the frequency band supported by the first antenna.

[0061] In one embodiment, Figure 2As shown, the third resonant mode is a parasitic mode of the second radiator 12 corresponding to the first free end of the second radiator 12 to the fourth ground point G4 , and the first free end of the second radiator 12 is an end close to the first radiator 11 .

[0062] In particular, under the excitation of the first feed signal, the branch (EH branch) between the first free end of the second radiator 12 and the fourth ground point G4 excites a third resonant mode, which is a parasitic mode of the EH branch. In the third resonant mode, the current in the EH branch primarily flows from H (the branch location corresponding to the fourth ground point G4) to E (the first free end of the second radiator 12). The second antenna excites a parasitic mode of the second frequency band in the EH branch, thereby enabling the second radiator 12 to serve as a parasitic branch to support the second frequency band, thereby expanding the frequency band supported by the second antenna.

[0063] In one embodiment, Figure 2 As shown, when the second tuning circuit 22 turns on the second tuning path, the second radiator 12 is excited by the second feeding signal to generate a fourth resonance mode to radiate a radio frequency signal in the third frequency band.

[0064] It can be understood that when the second tuning circuit 22 conducts the second tuning path, the third ground point G3 is grounded, and the third ground point G3 serves as the return point for the second feed signal. Under the stimulation of the second feed signal, the branch (EG branch) between the first free end of the second radiator 12 and the third ground point G3 is excited to generate a fourth resonant mode, radiating RF signals in the third frequency band, thereby enabling the second radiator 12 to support the third frequency band.

[0065] In one embodiment, Figure 2 As shown, the fourth resonance mode is a quarter-wavelength mode of the second radiator 12 corresponding to the first free end of the second radiator 12 to the third ground point G3 , and the first free end of the second radiator 12 is an end close to the first radiator 11 .

[0066] Under the excitation of the second feed signal, a branch (EG branch) between the first free end of the second radiator 12 and the third ground point G3 excites a fourth resonant mode, which is a quarter-wavelength mode of the EG branch. In the fourth resonant mode, the current in the EG branch primarily flows from G (the branch location corresponding to the third ground point G3) to E (the first free end of the second radiator 12). The second antenna excites a quarter-wavelength mode in the third frequency band in the EG branch, thereby enabling the second radiator 12 to support the third frequency band and expand the frequency band supported by the second antenna.

[0067] In one embodiment, Figure 3As shown, the second tuning circuit 22 includes: a first tuning switch 221 and a first tuning inductor L1.

[0068] The first end of the first tuning switch 221 is connected to the third ground point G3, and the second end of the first tuning switch 221 is connected to the common ground. The first end of the first tuning inductor L1 is connected to the second end of the first tuning switch 221, and the second end of the first tuning inductor L1 is connected to the common ground.

[0069] It can be understood that, due to the impedance characteristics of the inductor, higher-frequency signals are easily blocked by the inductor, while lower-frequency signals are more likely to pass through the inductor and reach the output terminal. Therefore, the first tuning inductor L1 can block higher-frequency signals from returning to ground. When the first tuning switch 221 connects the third ground point G3 to the common ground, higher-frequency signals can return to the common ground via the third ground point G3, and the second radiator 12 can support mid- and high-frequency bands. When the first tuning switch 221 connects the third ground point G3 to the first tuning inductor L1, lower-frequency signals can return to ground via the first tuning inductor L1, and the second radiator 12 can support low-frequency bands. Furthermore, based on the first tuning inductor L1's ability to block higher-frequency signals from returning to ground, the parasitic resonance excited by the second radiator 12 under the excitation of the first feed signal will shift toward higher frequencies, which helps improve the LB band bandwidth and radiation efficiency. Based on the foregoing, the second radiator 12 can support both mid- and high-frequency bands, thereby facilitating wider bandwidth coverage with fewer antenna radiators and improving the performance of the antenna device.

[0070] In one embodiment, Figure 3 As shown, when the first tuning switch 221 opens the path between the third ground point G3 and the common ground, the second radiator 12 is excited by the second feeding signal to excite the fourth resonance mode to radiate the radio frequency signal of the third frequency band.

[0071] When the second feed source S2 feeds a second feed signal to the second radiator 12 via the second feed point K2, the first tuning switch 221 connects the third ground point G3 to the common ground, and the second feed signal returns to ground via the third ground point G3. In this case, the second radiator 12, stimulated by the second feed signal, exhibits a fourth resonant mode, radiating radio frequency signals in the third frequency band, thereby enabling the second antenna to support the third frequency band.

[0072] When the first tuning switch 221 switches on the path between the first tuning inductor L1 and the third ground point G3 , the second radiator 12 is excited by the first feeding signal to generate a third resonance mode to radiate radio frequency signals in the second frequency band.

[0073] In the application, when the first feed source S1 feeds the first feed signal to the first radiator 11 through the first feed point K1, the second radiator 12 is capacitively coupled with the first radiator 11 through the gap, and the second radiator 12 excites the third resonant mode under the excitation of the first feed signal to radiate the radio frequency signal of the second frequency band. In this case, the first tuning switch 221 connects the third grounding point G3 and the first tuning inductor L1. Based on the characteristic that the first tuning inductor L1 can block the return of higher frequency signals to the ground, the parasitic resonance excited by the second radiator 12 under the excitation of the first feed signal shifts to the high frequency. The second radiator 12, under the excitation of the first feed signal, excites the third resonant mode as a parasitic branch to radiate the radio frequency signal of the second frequency band. In this way, the first resonant mode as the main mode can not only improve the LB band bandwidth and radiation efficiency, but also achieve the effect of full low-frequency band CA coverage.

[0074] In one embodiment, Figure 4 As shown, the second tuning circuit 22 includes: a second tuning switch 222, a second tuning inductor L2 and a tuning capacitor C1.

[0075] A first end of the second tuning switch 222 is connected to the third ground point G3. A first end of the second tuning inductor L2 is connected to a second end of the second tuning switch 222, and a second end of the second tuning inductor L2 is connected to a common ground. A first end of the tuning capacitor C1 is connected to the other second end of the second tuning switch 222, and a second end of the tuning capacitor C1 is connected to a common ground.

[0076] According to the impedance characteristics of the capacitor, lower frequency signals are easily blocked by the capacitor, while higher frequency signals are easily passed through the capacitor to the output terminal. Therefore, the tuning capacitor C1 can block lower frequency signals from returning to ground, while the second tuning inductor L2 can block higher frequency signals from returning to ground.

[0077] It can be understood that when the second tuning switch 222 connects the third ground point G3 and the second tuning inductor L2, based on the characteristics of the second tuning inductor L2, lower frequency signals can be returned to the common ground via the second tuning inductor L2, allowing the second radiator 12 to support the low frequency band. Simultaneously, the parasitic resonance on the second radiator 12 is shifted toward the high frequency band, thereby facilitating improved LB band bandwidth and radiation efficiency. When the first tuning switch 221 connects the third ground point G3 and the tuning capacitor C1, based on the characteristics of the tuning capacitor C1, higher frequency signals can be returned to the ground via the tuning capacitor C1, allowing the second radiator 12 to support the mid- and high-frequency bands. The second radiator 12 can thus support both the mid- and high-frequency bands and the low-frequency bands, thereby facilitating achieving wider bandwidth coverage with fewer antenna radiators and improving the performance of the antenna device.

[0078] It should be noted that, according to actual needs, the tuning path of the first tuning circuit 21 may also include at least one of a capacitor, a resistor, and an inductor, or a combination of multiple thereof, without further limitation herein.

[0079] In one embodiment, Figure 4 As shown, when the second tuning switch 222 opens the path between the third ground point G3 and the tuning capacitor C1, the second radiator 12 is excited by the second feeding signal to excite the fourth resonance mode to radiate the radio frequency signal of the third frequency band.

[0080] In an application, when the second feed source S2 feeds a second feed signal to the second radiator 12 via the second feed point K2, the second radiator 12 is stimulated by the second feed signal to generate a fourth resonant mode, radiating RF signals in the third frequency band. In this case, the second tuning switch 222 connects the third ground point G3 to the tuning capacitor C1, allowing the second feed signal to be returned to ground via the tuning capacitor C1. Based on the characteristics of the tuning capacitor C1, the resonant position of the fourth resonant mode can be fine-tuned, enabling the second radiator 12 to support mid- and high-frequency bands.

[0081] When the second tuning switch 222 opens the path between the second tuning inductor L2 and the third ground point G3 , the second radiator 12 is excited by the first feeding signal to generate a third resonance mode to radiate radio frequency signals in the second frequency band.

[0082] In the application, when the first feed source S1 feeds the first feed signal to the first radiator 11 through the first feed point K1, the second radiator 12 is capacitively coupled with the first radiator 11 through the gap, and the second radiator 12 excites the third resonant mode under the excitation of the first feed signal to radiate the radio frequency signal of the second frequency band. In this case, the second tuning switch 222 connects the third grounding point G3 and the second tuning inductor L2. Based on the characteristic that the second tuning inductor L2 can block the return of higher frequency signals to the ground, the parasitic resonance excited by the second radiator 12 under the excitation of the first feed signal shifts to the high frequency. The second radiator 12 excites the third resonant mode as a parasitic branch under the excitation of the first feed signal to radiate the radio frequency signal of the second frequency band. In this way, the first resonant mode as the main mode can not only improve the LB band bandwidth and radiation efficiency, but also achieve the effect of full low-frequency band CA coverage.

[0083] In one embodiment, Figure 5 As shown, the antenna device further includes: a first matching switch 301 , a first matching circuit 31 and a second matching circuit 32 .

[0084] A first end of the first matching switch 301 is connected to the first feeding point K1 .

[0085] The first end of the first matching circuit 31 is connected to a second end of the first matching switch 301, and the second end of the first matching circuit 31 is connected to the first feed point K1. The first matching circuit 31 is used to tune the resonant frequency of the RF signal in the first frequency band. The first matching circuit 31 can include at least one of a capacitor, a resistor, and an inductor, or a combination of multiple capacitors. In the embodiments of the present application, the device type of the frequency modulation device included in the first matching circuit 31 and the connection relationship between the devices are not further limited.

[0086] A first end of the second matching circuit 32 is connected to the other second end of the first matching switch 301 , and a second end of the second matching circuit 32 is connected to the second feeding point K2 . The second matching circuit 32 is used to tune the resonant frequency of the RF signal in the second frequency band.

[0087] It can be understood that when the first matching switch 301 connects the first feeding point K1 and the first matching circuit 31, the first feed signal provided by the first feed source S1 can be fed into the first radiator 11 via the first matching circuit 31 and the first feeding point K1. In this embodiment, by adjusting the frequency selection parameters of the first matching circuit 31 (for example, including resistance, inductance, and capacitance values), the resonant frequency of the first frequency band can be adjusted to radiate radio frequency signals in the second frequency band.

[0088] When the first matching switch 301 connects the first feeding point K1 and the second matching circuit 32, the first feed signal provided by the first feed source S1 can be fed into the first radiator 11 via the second matching circuit 32 and the first feeding point K1. The first radiator 11 then capacitively couples with the second radiator 12 through the gap, allowing the first feed signal to be fed into the second radiator 12. By adjusting the frequency selection parameters of the second matching circuit 32 (for example, which may include resistance, inductance, and capacitance values), the resonant frequency of the second frequency band can be adjusted to radiate RF signals in the second frequency band. Based on the coordination of the first matching switch 301, the first matching circuit 31, and the second matching circuit 32, the first antenna can radiate RF signals in the low-frequency band, thereby improving the communication performance of the antenna device for low-frequency RF signals.

[0089] In one embodiment, Figure 6 As shown, the antenna device further includes: a second matching switch 302 , a third matching circuit 33 and a fourth matching circuit 34 .

[0090] The second matching switch 302 has a first end connected to the second feeding point K2.

[0091] The third matching circuit 33 has a first end connected to a second end of the second matching switch 302 and a second end connected to the second feeding point K2 for tuning the resonant frequency of the RF signal in the third frequency band.

[0092] The fourth matching circuit 34 has a first end connected to the other second end of the second matching switch 302 and a second end connected to the second feeding point K2 for tuning the resonant frequency of the RF signal in the fourth frequency band.

[0093] It can be understood that when the second matching switch 302 connects the second feeding point K2 and the third matching circuit 33, the second feed signal provided by the second feed source S2 can be fed into the second radiator 12 via the third matching circuit 33 and the second feeding point K2. In this embodiment, the resonant frequency of the third frequency band can be adjusted by adjusting the frequency selection parameters of the third matching circuit 33 (for example, including resistance, inductance, and capacitance values), thereby radiating radio frequency signals in the third frequency band.

[0094] When the second matching switch 302 connects the second feed point K2 and the fourth matching circuit 34, the second feed signal provided by the second feed source S2 can be fed into the second radiator 12 via the fourth matching circuit 34 and the second feed point K2. The second radiator 12 then capacitively couples with the first radiator 11 through the gap, allowing the second feed signal to be fed into the first radiator 11. By adjusting the frequency selection parameters of the fourth matching circuit 34 (for example, which may include resistance, inductance, and capacitance values), the resonant frequency of the fourth frequency band can be adjusted to radiate RF signals in the fourth frequency band. Based on the coordination of the second matching switch 302, the third matching circuit 33, and the fourth matching circuit 34, the second antenna can radiate RF signals in the mid- to high-frequency bands, thereby improving the communication performance of the antenna device for RF signals in the mid- to high-frequency bands.

[0095] In applications, based on Figure 6 The antenna device shown in the figure is measured, and the S parameters of the antenna device in the low frequency band are as follows Figure 7 As shown, the S parameters in the medium and high frequency bands are as follows Figure 8 As shown, the antenna efficiency of the antenna device in the low frequency band is as follows Figure 9 As shown, the antenna efficiency in the medium and high frequency bands is as follows Figure 10 As shown, it can be found that the antenna device can achieve LB+MHB dual-mode coverage.

[0096] Based on the same inventive concept, Figure 11 As shown, the present application also provides an electronic device, comprising the antenna device according to any of the above embodiments.

[0097] The electronic device 40 may be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing device connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., a mobile phone), a mobile station (MS), and the like.

[0098] The electronic device 40 includes an antenna device. The antenna device provides a first feeding point on the first radiator, so that the first feed source can feed the first feed signal to the first radiator through the first feeding point. By controlling the working states of the first tuning circuit and the second tuning circuit, the first radiator can support the first frequency band, and the second radiator can support the second frequency band as a parasitic branch, thereby enabling different radiators to support different frequency bands, thereby expanding the frequency band covered by the antenna device. In addition, by providing a second feeding point on the second radiator, the second feed source can feed the second feed signal to the second radiator through the second feeding point, and by controlling the working states of the first tuning circuit and the second tuning circuit, the second radiator can support the third frequency band, and the first radiator can support the fourth frequency band as a parasitic branch, thereby further expanding the frequency band covered by the antenna device. Thus, it is possible to achieve ultra-wideband coverage with fewer antenna radiators, thereby improving the performance of the antenna device. Therefore, the electronic device 40 of the embodiment of the present application has high communication performance.

[0099] In one embodiment, Figure 11 As shown, the electronic device includes a middle plate and a conductive frame connected to the edge of the middle plate, and the first radiator and the second radiator are respectively arranged on the conductive frame.

[0100] The conductive frame 41 is provided on the periphery of the display screen 42 to support and protect the display screen 42. The conductive frame 41 extends into the interior of the electronic device 40 to form a middle plate. The integrally formed middle plate and frame are sometimes also referred to as a middle frame.

[0101] The conductive frame 41 may include a top frame 4101, a first side frame 4102, a bottom frame 4103 and a second side frame 4104 connected in sequence. The first radiator 11 may be arranged on the first side frame 4102 and the bottom frame 4103, and the second radiator 12 may be arranged on the bottom frame 4103 and the second side frame 4104.

[0102] The electronic device 40 is taken as an example of a mobile phone. The shape of the mobile phone display screen 42 can be a rectangle or an arc-cornered rectangle. The arc-cornered rectangle is sometimes also called a rounded rectangle, that is, the four corners of the rectangle are rounded, and the four sides of the rectangle are roughly straight line segments. The conductive frame 41 is provided on the periphery of the display screen 42 to support and protect the display screen 42. The conductive frame 41 can be made of a metal material such as an aluminum alloy, a magnesium alloy, or stainless steel. The conductive frame 41 can further extend into the interior of the electronic device 40 to form a middle plate. The display screen 42 can be fixedly connected to the conductive frame 41 or the middle plate using a process such as dispensing glue.

[0103] In applications, such as Figure 12As shown, the electronic device 40 may include a main board 43, and the first feed source S1, the second feed source S2, the first tuning circuit 21 and the second tuning circuit 22 of the antenna device can all be set on the main board 44, and the grounding points Gn on the first radiator 11 and the second radiator 12 are respectively connected to the ground layer of the main board 44 to achieve connection with the common ground.

[0104] In this embodiment, by arranging the first radiator 11 and the second radiator 12 on the conductive frame 41 respectively, the conductive frame 41 is reused, and the need for additional radiators is avoided, which is beneficial to miniaturization of the electronic device 40 and cost reduction.

[0105] like Figure 13 As shown, further, the electronic device is taken as a mobile phone 50 as an example for explanation, specifically, as Figure 13 As shown, the mobile phone 50 may include a memory 51 (which may optionally include one or more computer-readable storage media), a processing circuit 52, an input / output (I / O) subsystem 53, and at least one antenna device 54 as described in any of the above embodiments. These components may optionally communicate via one or more communication buses or signal lines 55. It will be understood by those skilled in the art that Figure 13 The illustrated mobile phone 50 does not constitute a limitation of the mobile phone and may include more or fewer components than shown, or may combine certain components, or arrange the components differently. Figure 13 The various components shown in the EMBODIMENTS 100 are implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application specific integrated circuits.

[0106] The memory 51 optionally includes a high-speed random access memory and optionally includes a non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplarily, the software components stored in the memory 51 include an operating system 511, a communication module (or instruction set) 512, a global positioning system (GPS) module (or instruction set) 513, etc.

[0107] The processing circuit 52 may be used to control the operation of the mobile phone 50. The processing circuit 52 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, and the like.

[0108] When the electronic device needs to operate in a target communication frequency band, the processing circuit 52 can control the on / off state of the tuning circuit to improve the communication performance of the electronic device operating in the target communication frequency band. For example, when the target communication frequency band is a low frequency band, the processing circuit 52 can control the first tuning circuit to be in an off state to improve the communication performance of the first antenna radiating low-frequency radio frequency signals.

[0109] Among other things, the I / O subsystem 53 couples input / output peripherals on the mobile phone 50, such as a keypad and other input control devices, to a peripheral device interface. The I / O subsystem 53 optionally includes a touch screen, buttons, a tone generator, an accelerometer (motion sensor), an ambient light sensor and other sensors, light-emitting diodes and other status indicators, a data port, and the like. For example, a user can control the operation of the mobile phone 50 by supplying commands via the I / O subsystem 53, and can use the output resources of the I / O subsystem 53 to receive status information and other output from the mobile phone 50. For example, a user can press button 531 to turn the mobile phone on or off.

[0110] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0111] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An antenna device, characterized in that: include: A first radiator, a second radiator, a first feed source, a second feed source, a first tuning circuit and a second tuning circuit, wherein a gap is provided between the first radiator and the second radiator; wherein, The first radiator is provided with a first feeding point, a first grounding point, and a second grounding point, wherein the first grounding point is located between the first feeding point and the second grounding point and is grounded through the first tuning circuit, the first feeding point is located on a side of the first radiator close to the second radiator, and the second grounding point is located on a side of the second radiator away from the second radiator and is grounded; A second feeding point, a third grounding point, and a fourth grounding point are provided on the second radiator, the third grounding point is located between the second feeding point and the fourth grounding point and is grounded through the second tuning circuit, the second feeding point is located on a side of the second radiator close to the first radiator, and the fourth grounding point is located on a side of the second radiator away from the first radiator and is grounded; The first feed source feeds a first feed signal to the first radiator through the first feeding point to excite the first radiator to generate a first resonant mode supporting a first frequency band; the second radiator is capacitively coupled to the first radiator through the gap and generates a third resonant mode supporting a second frequency band under the tuning action of the second tuning circuit; The second feed source feeds a second feed signal to the second radiator through the second feeding point to excite the second radiator to generate a fourth resonant mode supporting the third frequency band. The first radiator is capacitively coupled with the second radiator through the gap and, under the tuning action of the first tuning circuit, generates a second resonant mode supporting the fourth frequency band.

2. The antenna device according to claim 1, wherein When the first tuning circuit disconnects the first tuning path between the first ground point and the common ground, the first radiator is excited by the first feeding signal to generate the first resonance mode to radiate the radio frequency signal of the first frequency band.

3. The antenna device according to claim 2, wherein: The first resonant mode is a quarter-wavelength mode of the first radiator corresponding to the first free end of the first radiator to the second ground point, and the first free end of the first radiator is an end close to the second radiator.

4. The antenna device according to claim 1, wherein When the first tuning circuit conducts the first tuning path between the first ground point and the common ground, the first radiator is excited by the second feeding signal to generate the second resonance mode to radiate the radio frequency signal of the fourth frequency band.

5. The antenna device according to claim 4, wherein: The second resonant mode is a parasitic mode of the first radiator corresponding to the first free end of the first radiator to the first ground point, and the first free end of the first radiator is an end close to the second radiator.

6. The antenna device according to claim 1, wherein When the second tuning circuit disconnects the second tuning path between the third ground point and the common ground, the second radiator is excited by the first feeding signal to excite the third resonance mode to radiate the radio frequency signal of the second frequency band.

7. The antenna device according to claim 6, wherein: The third resonant mode is a parasitic mode of the second radiator corresponding to the first free end of the second radiator to the fourth ground point, and the first free end of the second radiator is an end close to the first radiator.

8. The antenna device according to claim 1, wherein When the second tuning circuit conducts the second tuning path between the third ground point and the common ground, the second radiator is excited by the second feeding signal to excite the fourth resonance mode to radiate the radio frequency signal in the third frequency band.

9. The antenna device according to claim 8, wherein The fourth resonance mode is a quarter-wavelength mode of the second radiator corresponding to the first free end of the second radiator to the third ground point, and the first free end of the second radiator is an end close to the first radiator.

10. The antenna device according to claim 1, wherein The second tuning circuit comprises: a first tuning switch, wherein a first end of the first tuning switch is connected to the third ground point, and a second end of the first tuning switch is connected to the common ground; A first tuning inductor, wherein a first end of the first tuning inductor is connected to the other second end of the first tuning switch, and a second end of the first tuning inductor is connected to the common ground.

11. The antenna device according to claim 10, wherein: When the first tuning switch connects the path between the third ground point and the common ground, the second radiator is excited by the second feeding signal to generate the fourth resonance mode to radiate the radio frequency signal in the third frequency band; When the first tuning switch turns on the path between the first tuning inductor and the third ground point, the second radiator is excited by the first feeding signal to excite the third resonance mode to radiate the radio frequency signal of the second frequency band.

12. The antenna device according to claim 1, wherein The second tuning circuit comprises: a second tuning switch, wherein a first end of the second tuning switch is connected to the third ground point; a second tuning inductor, wherein a first end of the second tuning inductor is connected to a second end of the second tuning switch, and a second end of the second tuning inductor is connected to a common ground; A tuning capacitor, wherein a first end of the tuning capacitor is connected to the other second end of the second tuning switch, and a second end of the tuning capacitor is connected to the common ground.

13. The antenna device according to claim 12, wherein: When the second tuning switch connects the path between the third ground point and the tuning capacitor, the second radiator is excited by the second feeding signal to generate the fourth resonance mode, so as to radiate the radio frequency signal in the third frequency band; When the second tuning switch turns on the path between the second tuning inductor and the third ground point, the second radiator is excited by the second feeding signal to excite the third resonance mode to radiate the radio frequency signal of the second frequency band.

14. The antenna device according to claim 1, wherein The antenna device further comprises: a first matching switch, wherein a first end of the first matching switch is connected to the first feeding point; a first matching circuit, wherein a first end of the first matching circuit is connected to a second end of the first matching switch, a second end of the first matching circuit is connected to the first feeding point, and the first matching circuit is used to tune the resonant frequency of the radio frequency signal in the first frequency band; A second matching circuit, wherein a first end of the second matching circuit is connected to the other second end of the first matching switch, a second end of the second matching circuit is connected to the second feeding point, and the second matching circuit is used to tune the resonant frequency of the radio frequency signal in the second frequency band.

15. The antenna device according to claim 1, wherein The antenna device further comprises: a second matching switch, wherein a first end of the second matching switch is connected to the second feeding point; a third matching circuit, wherein a first end of the third matching circuit is connected to a second end of the second matching switch, and a second end of the third matching circuit is connected to the second feeding point, and is used to tune the resonant frequency of the radio frequency signal in the third frequency band; A fourth matching circuit, wherein a first end of the fourth matching circuit is connected to the other second end of the second matching switch, and a second end of the fourth matching circuit is connected to the second feeding point, and is used to tune the resonant frequency of the radio frequency signal in the fourth frequency band.

16. The antenna device according to any one of claims 1 to 15, characterized in that: The first frequency band and the second frequency band are different sub-frequency bands in the low frequency band; The third frequency band and the fourth frequency band are different sub-frequency bands in the middle and high frequency bands respectively.

17. An electronic device, characterized in that: Comprising the antenna device according to any one of claims 1 to 16.

18. The electronic device according to claim 17, wherein: The electronic device includes a middle plate and a conductive frame connected to an edge of the middle plate, and the first radiator and the second radiator are respectively arranged on the conductive frame.

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