Antenna device and electronic equipment

Abstract

The invention relates to an antenna device and electronic equipment, and relates to the technical field of antennas. The antenna device comprises a first radiator, a second radiator, a first feed source, a second feed source and a first matching circuit, the first radiator is provided with a first grounding point and a first feeding point, the first grounding point divides the first radiator into a first sub-radiator and a second sub-radiator, the first feeding point is located on the first sub-radiator, and the first grounding point is connected with the common ground end through the first matching circuit; the first feed source provides a first excitation signal to excite the first sub-radiator to support a first frequency band through the first feed point, and the first matching circuit has a band-pass characteristic in the first frequency band; the second radiation body is provided with a second grounding point and a second feeding point, and the second feed source provides a second excitation signal to respectively excite the second sub-radiation body and the second radiation body to support a second frequency band through the second feeding point; wherein the first frequency band is different from the second frequency band. According to the invention, the isolation degree between the first sub-radiator and the second sub-radiator can be improved.

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 continuous advancement and development of communication technology, the functions of electronic devices are becoming increasingly rich, the frequency bands they support are also expanding, and the number of antennas integrated into the devices is also increasing to meet the diverse communication needs. However, when multiple antennas are arranged in the limited internal space of electronic devices, the isolation between antennas is often insufficient, which easily leads to signal interference, which directly affects the overall communication performance of the device. Summary of the invention

[0003] Based on this, it is necessary to provide an antenna device and an electronic device, which can improve the isolation between the first sub-radiator and the second sub-radiator.

[0004] In a first aspect, an embodiment of the present application provides an antenna device, including a first radiator, a second radiator, a first feed source, a second feed source, and a first matching circuit, wherein a first gap is provided between the first radiator and the second radiator; wherein,

[0005] The first radiator is provided with a first grounding point and a first feeding point connected to the first feed source, the first grounding point divides the first radiator into a first sub-radiator and a second sub-radiator, the first feeding point is located at the first sub-radiator, and the first grounding point is connected to a common ground terminal via the first matching circuit; the first feed source provides a first excitation signal to excite the first sub-radiator to support a first frequency band via the first feeding point, and the first matching circuit presents a bandpass characteristic in the first frequency band;

[0006] The second radiator is provided with a second grounding point and a second feeding point, the second grounding point is far away from the first gap, the second feeding point is close to the first gap, the second feed source provides a second excitation signal through the second feeding point to excite the second sub-radiator and the second radiator to support a second frequency band; wherein the first frequency band is different from the second frequency band.

[0007] In a second aspect, an embodiment of the present application provides an electronic device, comprising the antenna device as described above.

[0008] The above-mentioned antenna device and electronic device include a first radiator, a second radiator, a first feed source, a second feed source and a first matching circuit, a first gap is provided between the first radiator and the second radiator, wherein the first radiator is provided with a first grounding point and a first feeding point connected to the first feed source, the first grounding point divides the first radiator into a first sub-radiator and a second sub-radiator, the first feeding point is located at the first sub-radiator, the first grounding point is connected to the common ground terminal via the first matching circuit, the first feed source provides a first excitation signal to excite the first sub-radiator to support a first frequency band via the first feeding point, the first matching circuit presents a bandpass characteristic in the first frequency band, the second radiator is provided with a second grounding point and a second feeding point, the second grounding point is far away from the first gap, the second feeding point is close to the first gap, the second feed source provides a second excitation signal to excite the second sub-radiator and the second radiator to support a second frequency band via the second feeding point, wherein the first frequency band is different from the second frequency band. In the antenna device provided in the embodiment of the present application, since the first matching circuit is in the on state when the first sub-radiator operates in the first frequency band, the energy radiated by the first sub-radiator can flow into the common ground terminal from the first grounding point through the first matching circuit, thereby reducing the influence of the first sub-radiator on the second sub-radiator. Therefore, without changing the working modes of the first sub-radiator and the second sub-radiator, the mutual influence between the first sub-radiator and the second sub-radiator is reduced, so that less current leaks from one of the two sub-radiators sharing the same grounding point to the other when working, thereby improving the isolation between the first sub-radiator and the second sub-radiator, and further improving the performance of the antenna device. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] 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.

[0010] FIG1 is a schematic diagram of a structure of an antenna device according to an embodiment;

[0011] FIG2 is a schematic structural diagram of a first matching circuit according to an embodiment;

[0012] FIG3 is a second schematic structural diagram of an antenna device according to an embodiment;

[0013] FIG4 is a schematic structural diagram of a second matching circuit according to an embodiment;

[0014] FIG5 is a third schematic structural diagram of an antenna device according to an embodiment;

[0015] FIG6 is a fourth schematic structural diagram of an antenna device according to an embodiment;

[0016] FIG7 is a fifth structural diagram of an antenna device according to an embodiment;

[0017] FIG8 is a sixth structural diagram of an antenna device according to an embodiment;

[0018] FIG9 is a schematic diagram of an S-parameter simulation curve of an antenna device according to an embodiment;

[0019] FIG10 is a schematic diagram of an efficiency simulation curve of an antenna device according to an embodiment;

[0020] FIG11a is a schematic diagram of current distribution simulation of a first sub-radiator of an antenna device according to an embodiment;

[0021] FIG11b is a grayscale schematic diagram of FIG11a;

[0022] FIG12a is a schematic diagram of current distribution simulation of a second sub-radiator of an antenna device according to an embodiment;

[0023] FIG12b is a grayscale schematic diagram of FIG12a;

[0024] FIG13 is a schematic structural diagram of an electronic device according to an embodiment;

[0025] FIG. 14 is a schematic structural diagram of an electronic device according to another embodiment.

[0026] Description of reference numerals:

[0027] 11-first radiator, 111-first sub-radiator, 112-second sub-radiator, 12-second radiator, 13-first feed source, 14-second feed source, 15-first matching circuit, 16-second matching circuit, 30-mobile phone, 31-memory, 311-operating system, 312-communication module, 313-GPS module, 32-processing circuit, 33-I / O subsystem, 331-button, 34-antenna device, 35-signal line. DETAILED DESCRIPTION

[0028] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided 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, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[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 belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0030] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first radiator may be referred to as a second radiator, and similarly, a second radiator may be referred to as a first radiator without departing from the scope of this application. Both the first radiator and the second radiator are radiators, but they are not the same radiator.

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

[0032] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least part of an element” means part or all of an element.

[0033] When used herein, the singular forms "a", "an", and "said / the" may also include 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, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of 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 relevant listed items.

[0034] The antenna device involved in the embodiment of the present application can be applied to electronic devices with wireless communication functions, and the electronic devices can be 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 the convenience of description, the above-mentioned devices are collectively referred to as electronic devices.

[0035] In one embodiment, as shown in FIG1 , an antenna device is provided, which includes a first radiator 11, a second radiator 12, a first feed source 13, a second feed source 14 and a first matching circuit 15. A first gap d1 is provided between the first radiator 11 and the second radiator 12.

[0036] The first radiator 11 is provided with a first grounding point G1 and a first feeding point S1. The first grounding point G1 divides the first radiator 11 into a first sub-radiator 111 and a second sub-radiator 112. The first grounding point G1 is connected to the common ground GND via a first matching circuit 15. The first feeding point S1 is located at the first sub-radiator 111. The first feeding point S1 is connected to the first feed source 13.

[0037] The first feed source 13 may be a device for generating a first excitation signal (or a first feed signal). The first excitation signal provided by the first feed source 13 excites the first sub-radiator 111 to support the first frequency band via the first feeding point S1. The first sub-radiator 111 supporting the first frequency band can be understood as the first sub-radiator 111 being used to receive a radio frequency signal of the first frequency band, or the first sub-radiator 111 being used to transmit a radio frequency signal of the first frequency band, or the first sub-radiator 111 being used to receive and transmit a radio frequency signal of the first frequency band. Among them, the first matching circuit 15 presents a bandpass characteristic in the first frequency band. When the first sub-radiator 111 operates in the first frequency band, the first matching circuit 15 is in a conducting state.

[0038] The second radiator 12 is provided with a second grounding point G2 and a second feeding point S2. The second grounding point G2 is far away from the first gap d1, and the second grounding point G2 is connected to the common ground terminal GND. The second feeding point S2 is close to the first gap d1. The second feeding point S2 is connected to the second feed source 14. The second excitation signal provided by the second feed source 14 excites the second sub-radiator 112 and the second radiator 12 to support the second frequency band through the second feeding point S2. That is, the second feed source 14 feeds the second excitation signal to the second radiator 12 through the second feeding point S2, so that the second radiator 12 is capacitively coupled with the second sub-radiator 112 through the first gap d1, so that the second sub-radiator 112 and the second radiator 12 jointly support the second frequency band. The second sub-radiator 112 and the second radiator 12 jointly support the second frequency band, which can be understood as the second sub-radiator 112 and the second radiator 12 are jointly used to receive radio frequency signals in the second frequency band, or the second sub-radiator 112 and the second radiator 12 are jointly used to transmit radio frequency signals in the second frequency band, or the second sub-radiator 112 and the second radiator 12 are jointly used to receive and transmit radio frequency signals in the second frequency band.

[0039] The first gap d1 can be used as a coupling gap between the second sub-radiator 112 and the second radiator 12, and is used to achieve capacitive coupling between the second sub-radiator 112 and the second radiator 12. It should be noted that the width of the first gap d1 between the second sub-radiator 112 and the second radiator 12 can be determined according to actual conditions, and it needs to meet the minimum size that the second sub-radiator 112 and the second radiator 12 can be coupled.

[0040] The first frequency band is different from the second frequency band. Exemplarily, the frequency range covered by the first frequency band is different from the frequency range covered by the second frequency band.

[0041] Exemplarily, 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. In the embodiment of the present application, the radiator type of the first radiator 11 and the second radiator 12 is not further limited, 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 the sake of convenience, the first radiator 11 and the second radiator 12 are metal radiating branches, such as a conductive frame of an electronic device.

[0042] The antenna device comprises a first radiator 11, a second radiator 12, a first feed source 13, a second feed source 14 and a first matching circuit 15. A first gap d1 is provided between the first radiator 11 and the second radiator 12. The first radiator 11 is provided with a first grounding point G1 and a first feeding point S1 connected to the first feed source 13. The first grounding point G1 divides the first radiator 11 into a first sub-radiator 111 and a second sub-radiator 112. The first feeding point S1 is located on the first sub-radiator 111. The first grounding point G1 is connected to the second sub-radiator 112 via the first matching circuit 15. The common ground terminal GND is connected, the first feed source 13 provides a first excitation signal to excite the first sub-radiator 111 through the first feeding point S1 to support the first frequency band, the first matching circuit 15 presents a bandpass characteristic in the first frequency band, the second radiator 12 is provided with a second grounding point G2 and a second feeding point S2, the second grounding point G2 is far away from the first gap d1, and the second feeding point S2 is close to the first gap d1, the second feed source 14 provides a second excitation signal to excite the second sub-radiator 112 and the second radiator 12 through the second feeding point S2 to support the second frequency band, wherein the first frequency band is different from the second frequency band. In the antenna device provided in the embodiment of the present application, since the first matching circuit 15 is in a conducting state when the first sub-radiator 111 operates in the first frequency band, the energy radiated by the first sub-radiator 111 can flow into the common ground terminal GND from the first ground point G1 through the first matching circuit 15, thereby reducing the influence of the first sub-radiator 111 on the second sub-radiator 112. Therefore, without changing the operating modes of the first sub-radiator 111 and the second sub-radiator 112, the mutual influence between the first sub-radiator 111 and the second sub-radiator 112 is reduced, so that less current leaks from one of the two sub-radiators sharing the same ground point to the other when operating, thereby improving the isolation between the first sub-radiator 111 and the second sub-radiator 112, and further improving the performance of the antenna device.

[0043] In one embodiment, the first frequency band includes a WiFi (Wireless Fidelity) frequency band, and the second frequency band includes a middle frequency band and a high frequency band (MHB) frequency band. Exemplarily, the WiFi frequency band includes WiFi 2.4 GHz, and the MHB frequency band includes a B40 frequency band. The antenna device provided in the embodiment of the present application sets a first matching circuit 15 at the first grounding point G1 to which the first sub-radiator 111 and the second sub-radiator 112 are commonly connected. Without changing the working modes of the first sub-radiator 111 and the second sub-radiator 112, the current leaked to the second sub-radiator 112 when the first sub-radiator 111 works in a WiFi frequency band such as the WiFi 2.4G frequency band is reduced, and the current leaked to the second sub-radiator 112 when the second sub-radiator 112 works in an MHB frequency band such as the B40 frequency band is reduced, thereby reducing mutual interference between the first sub-radiator 111 and the second sub-radiator 112, improving the isolation between the first sub-radiator 111 when working in a WiFi frequency band such as the WiFi 2.4G frequency band and the second sub-radiator 112 when working in an MHB frequency band such as the B40 frequency band, thereby improving the performance of the antenna device.

[0044] In one embodiment, as shown in FIG2 , the first matching circuit 15 includes at least one first capacitor C1. The first capacitor C1 is connected to the first ground point G1 and the common ground terminal GND, respectively. The number of the first capacitors C1 can be 1, 2, 3 or other values. Specifically, the appropriate number can be selected according to the isolation requirements between the first sub-radiator 111 and the second sub-radiator 112, the capacitance value of the first capacitor C1 and other factors, and no excessive restrictions are made here. When the number of the first capacitors C1 is greater than or equal to 2, the connection mode between the multiple first capacitors C1 includes at least one of series connection or parallel connection. For example, taking the first matching circuit 15 shown in FIG2 as an example, the first matching circuit 15 includes two first capacitors C1 in parallel, and the two first capacitors C1 are connected to the first ground point G1 and the common ground terminal GND, respectively.

[0045] In the above antenna device, the first matching circuit 15 presents a bandpass characteristic in the first frequency band (such as the WiFi 2.4G frequency band) through at least one first capacitor C1, so that the energy radiated by the first sub-radiator 111 can flow into the common ground terminal GND from the first ground point G1 through the first matching circuit 15, thereby reducing the mutual influence between the first sub-radiator 111 and the second sub-radiator 112 without changing the working mode of the first sub-radiator 111 and the second sub-radiator 112, so that less current leaks from one of the two sub-radiators sharing the same ground point to the other when working, thereby improving the isolation between the first sub-radiator 111 and the second sub-radiator 112, and thus improving the performance of the antenna device.

[0046] In one embodiment, as shown in FIG3 , the antenna device further includes a second matching circuit 16. The second matching circuit 16 is connected to the first feed 13 and the second feed 14, respectively. Exemplarily, the first end of the second matching circuit 16 is connected to the first feed 13, and the second end of the second matching circuit 16 is connected to the second feed 14 and the second feed point S2, respectively. The second matching circuit 16 is used to perform impedance matching on the first feed 13 and the second feed 14, so as to reduce the mutual coupling effect between the radio frequency signal of the first frequency band supported by the first sub-radiator 111 and the radio frequency signal of the second frequency band supported by the second sub-radiator 112, which is similar to the neutral line principle. In this way, on the basis of the first matching circuit 15, combined with the second matching circuit 16, the isolation between the first sub-radiator 111 and the second sub-radiator 112 is further improved, and the mutual interference between the first sub-radiator 111 and the second sub-radiator 112 is reduced without changing the working mode of the first sub-radiator 111 and the second sub-radiator 112, thereby further improving the performance of the antenna device.

[0047] In one embodiment, as shown in FIG4 , the second matching circuit 16 includes at least one lumped device. The lumped device is connected to the first feed 13 and the second feed 14, respectively. The lumped device includes at least one of a second capacitor C2 and a first inductor L1. Exemplarily, the lumped device includes at least one second capacitor C2. In another exemplary embodiment, the lumped device includes at least one first inductor L1. In another exemplary embodiment, the lumped device includes at least one second capacitor C2 and at least one first inductor L1, wherein the connection mode of the second capacitor C2 and the first inductor L1 includes at least one of series connection and parallel connection. It should be noted that the device type, device connection mode, etc. included in the lumped device can be specifically determined according to the input impedance characteristics of the first sub-radiator 111, the second sub-radiator 112 and the second radiator 12 in different directions, the isolation requirement between the first sub-radiator 111 and the second sub-radiator 112, and other factors, and are not excessively limited here.

[0048] In the above-mentioned antenna device, the second matching circuit 16 is connected to the first feed source 13 and the second feed source 14 respectively through at least one lumped device to achieve impedance matching of the first feed source 13 and the second feed source 14, thereby reducing the mutual coupling effect between the first sub-radiator 111 and the second sub-radiator 112, thereby further improving the isolation between the first sub-radiator 111 and the second sub-radiator 112 on the basis of the first matching circuit 15, and further reducing the mutual interference between the first sub-radiator 111 and the second sub-radiator 112 without changing the working mode of the first sub-radiator 111 and the second sub-radiator 112, thereby further improving the performance of the antenna device.

[0049] In one embodiment, the second matching circuit 16 is connected to the first feed source 13 and the second feed source 14 respectively through a microstrip line. Exemplarily, the first feed source 13 and the second feed source 14 are respectively arranged on the same printed circle Board (PCB), and the second matching circuit 16 is connected to the first feed source 13 and the second feed source 14 respectively through a microstrip line on the PCB. In this way, the second matching circuit 16 is connected to the first feed source 13 and the second feed source 14 respectively through the microstrip line to achieve impedance matching of the first feed source 13 and the second feed source 14. The connection method is simple, which helps to improve the integration and realize the miniaturization of the antenna.

[0050] In one embodiment, the second matching circuit 16 is connected to the first feed 13 and the second feed 14 respectively through cables. In this way, the second matching circuit 16 is connected to the first feed 13 and the second feed 14 respectively through cables to achieve impedance matching of the first feed 13 and the second feed 14, similar to the neutral line principle, by reducing the mutual coupling effect between the first sub-radiator 111 and the second sub-radiator 112, the purpose of improving the isolation between the first sub-radiator 111 and the second sub-radiator 112 is achieved, and the layout of the first feed 13 and the second feed 14 is not constrained, with high flexibility, and is suitable for a variety of layout scenarios.

[0051] In one embodiment, as shown in FIG5 , the first sub-radiator 111 is stimulated by the first excitation signal to generate a first resonance mode to radiate a radio frequency signal of the first frequency band. The first resonance mode is used to support the reception and transmission of radio frequency signals of the first frequency band. The first resonance mode is a loop (LOOP) mode of a part of the sub-radiator from the first feeding point S1 to the first grounding point G1, and from the first grounding point G1 to the first feeding point S1, to radiate radio frequency signals of the first frequency band, such as radio frequency signals of the WiFi 2.4G frequency band. The first sub-radiator 111 can be stimulated by the first excitation signal to generate a LOOP mode to support the reception and transmission of radio frequency signals of the first frequency band (such as the WiFi 2.4G frequency band), thereby realizing the reception and transmission of radio frequency signals of the first frequency band by the antenna device to meet the communication requirements of the first frequency band.

[0052] In one embodiment, as shown in FIG6 , the second sub-radiator 112 is stimulated by the second excitation signal to generate a second resonance mode to radiate a radio frequency signal of a second frequency band. The second resonance mode is used to support the reception and transmission of radio frequency signals of a second frequency band. The second resonance mode is a quarter-wavelength parasitic mode of the second sub-radiator 112 from the first ground point G1 to the first end of the second sub-radiator 112 close to the first gap d1 to radiate radio frequency signals of a second frequency band, such as radio frequency signals of an MHB band (such as a B40 band). The second sub-radiator 112 can be stimulated by the second excitation signal to generate a λ / 4 parasitic mode to support the reception and transmission of radio frequency signals of a second frequency band (such as an MHB band), thereby realizing the reception and transmission of radio frequency signals of a second frequency band by the antenna device to meet the communication requirements of the second frequency band.

[0053] Please continue to refer to Figure 6. In one embodiment, the second radiator 12 is stimulated by the second excitation signal to generate a third resonance mode to radiate the radio frequency signal of the second frequency band. The third resonance mode is used to support the reception and transmission of the radio frequency signal of the second frequency band. The third resonance mode is a quarter-wavelength mode of the partial sub-radiator from the second feeding point S2 to the second grounding point G2 to radiate the radio frequency signal of the second frequency band, such as the radio frequency signal of the MHB band. The second radiator 12 can be stimulated by the second excitation signal to generate a λ / 4 mode to support the reception and transmission of the radio frequency signal of the second frequency band (such as the MHB band). In this way, the antenna device can transmit and receive the radio frequency signal of the second frequency band, which can further cover the second frequency band, help to improve the performance of the antenna device in supporting the second frequency band, and further meet the communication requirements of the second frequency band.

[0054] In one embodiment, the first feed source 13 provides a third excitation signal to excite the first sub-radiator 111 to support the GPS L5 frequency band via the first feeding point S1, wherein the GPS L5 frequency band is different from the first frequency band and the second frequency band, respectively. For example, the first frequency band includes the WiFi frequency band, and the second frequency band includes the medium and high frequency band. The first sub-radiator 111 supporting the GPS L5 frequency band can be understood as the first sub-radiator 111 is used to receive the RF signal of the GPS L5 frequency band, or the first sub-radiator 111 is used to transmit the RF signal of the GPS L5 frequency band, or the first sub-radiator 111 is used to receive and transmit the RF signal of the GPS L5 frequency band. In this way, the first sub-radiator 111 can also support the reception and transmission of the RF signal of the GPS L5 frequency band, and the first sub-radiator 111 covers the GPS L5 frequency band and the first frequency band (such as the WiFi2.4G frequency band) without increasing the antenna structure and affecting the performance of other radiators, thereby improving the antenna integration and facilitating the miniaturization of the antenna.

[0055] In one embodiment, as shown in FIG7 , the first sub-radiator 111 is stimulated by the third excitation signal to generate a fourth resonance mode to radiate a radio frequency signal of the GPS L5 frequency band. The fourth resonance mode is used to support the reception and transmission of radio frequency signals of the GPS L5 frequency band. The fourth resonance mode is a composite left-right-handed (CRLH) mode of a portion of the radiator from the first feeding point S1 to the first grounding point G1 to radiate radio frequency signals of the GPS L5 frequency band. The first sub-radiator 111 can be stimulated by the third excitation signal to generate a CRLH mode to support the reception and transmission of radio frequency signals of the GPS L5 frequency band, thereby realizing the reception and transmission of radio frequency signals of the GPS L5 frequency band by the antenna device, which can further cover the GPS L5 frequency band, help improve the performance of the antenna device in supporting the GPS L5 frequency band, and further meet the communication requirements of the GPS L5 frequency band.

[0056] In one embodiment, as shown in FIG8 , an antenna device is provided, which includes a first radiator 11, a second radiator 12, a first feed source 13, a second feed source 14, a first matching circuit 15, and a second matching circuit 16. A first gap d1 is provided between the first radiator 11 and the second radiator 12.

[0057] The first radiator 11 is provided with a first grounding point G1, and the first grounding point G1 divides the first radiator 11 into a first sub-radiator 111 and a second sub-radiator 112. The first grounding point G1 is connected to the common ground GND via a first matching circuit 15. The first sub-radiator 111 is provided with a first feeding point S1, and the first feeding point S1 is connected to the first feed source 13. The first feed source 13 provides a first excitation signal to excite the first sub-radiator 111 to support the WiFi 2.4G frequency band via the first feeding point S1. The first feed source 13 provides a third excitation signal to excite the first sub-radiator 111 to support the GPS L5 frequency band via the first feeding point S1. The first matching circuit 15 has a bandpass characteristic in the first frequency band. The first matching circuit 15 includes two first capacitors C1 connected in parallel.

[0058] The second radiator 12 is provided with a second grounding point G2 and a second feeding point S2. The second grounding point G2 is far away from the first gap d1, and the second grounding point G2 is connected to the common ground terminal GND. The second feeding point S2 is close to the first gap d1, and the second feeding point S2 is connected to the second feed source 14. The second feed source 14 provides a second excitation signal to excite the second sub-radiator 112 and the second radiator 12 to support the MHB frequency band (such as the B40 frequency band) through the second feeding point S2. The second feed source 14 provides a second excitation signal to excite the second radiator 12 to support the MHB frequency band through the second feeding point S2. Among them, the second matching circuit 16 includes a first inductor L1, and the first inductor L1 is connected to the first feed source 13 and the second feed source 14 respectively through a microstrip line. The first inductor L1 is used to perform impedance matching on the first feed source 13 and the second feed source 14 to reduce the mutual coupling effect between the radio frequency signal of the WiFi 2.4G frequency band supported by the first sub-radiator 111 and the radio frequency signal of the MHB frequency band supported by the second sub-radiator 112.

[0059] Based on the above antenna device, simulations are performed to obtain simulation results of FIG9, FIG10, FIG11a, FIG11b, FIG12a and FIG12b. Among them, FIG9 is a schematic diagram of an S parameter curve of an antenna device provided in an embodiment of the present application, FIG10 is a schematic diagram of an efficiency curve of an antenna device provided in an embodiment of the present application, FIG11a and FIG11b are schematic diagrams of current distribution of a radio frequency signal of a first frequency band radiated by a first sub-radiator 111 in an antenna device provided in an embodiment of the present application, and FIG12a and FIG12b are schematic diagrams of current distribution of a radio frequency signal of a second frequency band radiated by a second sub-radiator 112 in an antenna device provided in an embodiment of the present application. It can be seen that the S21 isolation of the first sub-radiator 111 and the second sub-radiator 112 is improved to -12dB, which basically meets the design requirements, and it can be seen from the current distribution that the current leaked from one of the first sub-radiator 111 and the second sub-radiator 112 to the other is small when working.

[0060] The above-mentioned antenna device, by setting a first matching circuit 15 between the first ground point G1 and the common ground GND, and setting a second matching circuit 16 between the first feed source 13 and the second feed source 14, thereby matching and adjusting the antenna device through the first matching circuit 15 combined with the second matching circuit 16, improving the isolation between the first sub-radiator 111 and the second sub-radiator 112, effectively improving the isolation between the antenna supporting the WIFI 2.4G frequency band and the antenna supporting the MHB frequency band, and improving the performance of the antenna device.

[0061] Based on the same inventive concept, in one embodiment, as shown in FIG. 13 , the present application further provides an electronic device, including the antenna device as described above. The specific structure of the antenna device can be found in the above related introduction and will not be repeated here.

[0062] The electronic device includes an antenna device, which includes a first radiator 11, a second radiator 12, a first feed source 13, a second feed source 14 and a first matching circuit 15. A first gap d1 is provided between the first radiator 11 and the second radiator 12. The first radiator 11 is provided with a first grounding point G1 and a first feeding point S1 connected to the first feed source 13. The first grounding point G1 divides the first radiator 11 into a first sub-radiator 111 and a second sub-radiator 112. The first feeding point S1 is located on the first sub-radiator 111. The first grounding point G1 is connected to the first matching circuit 15. The circuit 15 is connected to the common ground GND, the first feed source 13 provides a first excitation signal to excite the first sub-radiator 111 to support the first frequency band via the first feeding point S1, the first matching circuit 15 presents a bandpass characteristic in the first frequency band, the second radiator 12 is provided with a second grounding point G2 and a second feeding point S2, the second grounding point G2 is far away from the first gap d1, and the second feeding point S2 is close to the first gap d1, the second feed source 14 provides a second excitation signal to excite the second sub-radiator 112 and the second radiator 12 to support the second frequency band via the second feeding point S2, wherein the first frequency band is different from the second frequency band. In the antenna device provided in the embodiment of the present application, since the first matching circuit 15 is in a conducting state when the first sub-radiator 111 operates in the first frequency band, the energy radiated by the first sub-radiator 111 can flow into the common ground from the first grounding point G1 via the first matching circuit 15, thereby reducing the influence of the first sub-radiator 111 on the second sub-radiator 112. Thus, without changing the operating modes of the first sub-radiator 111 and the second sub-radiator 112, the mutual influence between the first sub-radiator 111 and the second sub-radiator 112 is reduced, so that when one of the two sub-radiators sharing the same grounding point is operating, less current leaks to the other, thereby improving the isolation between the first sub-radiator 111 and the second sub-radiator 112, thereby improving the performance of the antenna device.

[0063] Please continue to refer to Figure 13. In one embodiment, the electronic device includes a top edge 201 and a bottom edge 202 that are arranged opposite to each other, and a first side edge 203 and a second side edge 204 that are arranged opposite to each other. The antenna device is arranged near the top edge. Exemplarily, at least a portion of the first radiator 11 and the second radiator 12 in the antenna device is arranged near the top edge 201. For example, a portion of the first radiator 11 and the second radiator 12 is arranged near the top edge, and the remaining portion of the second radiator 12 is arranged near the second side edge 204.

[0064] In this embodiment, by setting the antenna device close to the top edge, the antenna device can have a better antenna efficiency, thereby improving the communication performance of the electronic device. For example, when the first sub-radiator 111 supports the WiFi 2.4G and GPS L5 frequency bands, and the second sub-radiator 112 and the second radiator 12 respectively support the MHB frequency band, the antenna device is set close to the top edge 201, and the electronic device can support the transmission and reception of radio frequency signals of the WiFi 2.4G and GPS L5 frequency bands respectively through the first sub-radiator 111, and support the transmission and reception of radio frequency signals of the MHB frequency band respectively through the second sub-radiator 112 and the second radiator 12, thereby meeting the communication requirements of multiple frequency bands and achieving performance such as accurate positioning and satellite communication.

[0065] As shown in FIG14 , further, the electronic device is a mobile phone 30 as an example for explanation. Specifically, as shown in FIG14 , the mobile phone 30 may include a memory 31 (which optionally includes one or more computer-readable storage media), a processing circuit 32, an input / output (I / O) subsystem 33 and at least one antenna device 34 as described in any of the aforementioned embodiments. These components optionally communicate through one or more communication buses or signal lines 35. Those skilled in the art will appreciate that the mobile phone 30 shown in FIG14 does not constitute a limitation on the mobile phone, and may include more or fewer components than shown in the figure, or combine certain components, or arrange components differently. The various components shown in FIG14 are implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application-specific integrated circuits.

[0066] The memory 31 optionally includes a high-speed random access memory, and optionally also includes a non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplarily, the software components stored in the memory 31 include an operating system 311, a communication module (or an instruction set) 312, a global positioning system (GPS) module (or an instruction set) 313, etc.

[0067] The processing circuit 32 may be used to control the operation of the mobile phone 30. The processing circuit 32 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.

[0068] Among them, the I / O subsystem 33 couples input / output peripherals on the mobile phone 30, such as a keypad and other input control devices, to a peripheral device interface. The I / O subsystem 33 optionally includes a touch screen, buttons, a tone generator, an accelerometer (motion sensor), an ambient light sensor and other sensors, a light emitting diode and other status indicators, a data port, etc. Exemplarily, a user can control the operation of the mobile phone 30 by supplying commands via the I / O subsystem 33, and can use the output resources of the I / O subsystem 33 to receive status information and other outputs from the mobile phone 30. For example, a user can start the mobile phone or turn it off by pressing a button 331.

[0069] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0070] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0071] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

[0072] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0073] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0074] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An antenna device, characterized in that: It includes a first radiator, a second radiator, a first feed source, a second feed source and a first matching circuit, wherein a first gap is provided between the first radiator and the second radiator; wherein, The first radiator is provided with a first grounding point and a first feeding point connected to the first feed source, the first grounding point divides the first radiator into a first sub-radiator and a second sub-radiator, the first feeding point is located at the first sub-radiator, and the first grounding point is connected to a common ground terminal via the first matching circuit; the first feed source provides a first excitation signal to excite the first sub-radiator to support a first frequency band via the first feeding point, and the first matching circuit presents a bandpass characteristic in the first frequency band; The second radiator is provided with a second grounding point and a second feeding point, the second grounding point is far away from the first gap, the second feeding point is close to the first gap, the second feed source provides a second excitation signal through the second feeding point to excite the second sub-radiator and the second radiator to support a second frequency band; wherein the first frequency band is different from the second frequency band.

2. The antenna device according to claim 1, characterized in that The first matching circuit includes at least one first capacitor, and the first capacitor is connected to the first ground point and the common ground terminal respectively.

3. The antenna device according to claim 1, characterized in that The antenna device also includes a second matching circuit, which is connected to the first feed source and the second feed source respectively, and the second matching circuit is used to perform impedance matching on the first feed source and the second feed source.

4. The antenna device according to claim 3, characterized in that: The second matching circuit includes at least one lumped component, the lumped component is connected to the first feed source and the second feed source respectively, and the lumped component includes at least one of a second capacitor and a first inductor.

5. The antenna device according to claim 3, characterized in that: The second matching circuit is connected to the first feed source and the second feed source respectively through microstrip lines; or, The second matching circuit is connected to the first feed source and the second feed source through cables respectively.

6. The antenna device according to any one of claims 1 to 5, characterized in that: Under the excitation of the first excitation signal, the first sub-radiator excites a first resonance mode to radiate the radio frequency signal of the first frequency band. The first resonance mode is a loop mode of a part of the radiator from the first feeding point to the first grounding point and from the first grounding point to the first feeding point.

7. The antenna device according to any one of claims 1 to 5, characterized in that: The second sub-radiator is stimulated by the second excitation signal to generate a second resonant mode to radiate the radio frequency signal of the second frequency band, and the second resonant mode is a quarter-wavelength parasitic mode of the second sub-radiator from the first ground point to the first end of the second sub-radiator close to the first slot.

8. The antenna device according to any one of claims 1 to 5, characterized in that: The second radiator is excited by the second excitation signal to generate a third resonance mode to radiate a radio frequency signal in the second frequency band. The third resonance mode is a quarter-wavelength mode of a portion of the radiator from the second feeding point to the second grounding point.

9. The antenna device according to any one of claims 1 to 5, characterized in that: The first frequency band includes a WiFi frequency band, and the second frequency band includes a medium and high frequency band.

10. The antenna device according to any one of claims 9, characterized in that: The first feed source provides a third excitation signal via the first feeding point to excite the first sub-radiator to support the GPS L5 frequency band.

11. The antenna device according to claim 10, characterized in that: The first sub-radiator is excited by the third excitation signal to generate a fourth resonance mode to radiate the RF signal of the GPS L5 frequency band. The fourth resonance mode is a composite left-right-hand mode of a portion of the radiator from the first feeding point to the first grounding point.

12. An electronic device, characterized in that: The electronic device comprises the antenna device according to any one of claims 1-11.

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