Antenna structure and electronic device

Abstract

The embodiment of the present application provides an antenna structure, characterized in that it includes: a substrate, a first antenna and a second antenna; the first antenna includes a first feeding component and a first slot hole provided on the substrate; the second antenna includes a second feeding component, and a second slot hole and a third slot hole provided on the substrate; the second slot hole and the third slot hole are symmetrically arranged with respect to the symmetry axis of the first slot hole; the first feeding component is used to feed the first slot hole so that the first excitation current of the first antenna is positively symmetrical with respect to the symmetry axis of the first slot hole on the substrate; the second feeding component is used to feed the second slot hole and the third slot hole so that the second excitation current of the second antenna is reversely symmetrical with respect to the symmetry axis of the first slot hole on the substrate. The embodiment of the present application also provides an electronic device.

Description

Technical Field

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

[0002] Multiple Input Multiple Output (MIMO) technology refers to the use of multiple antennas at the transmitting and receiving ends of the system, so that wireless signals are transmitted and received through multiple antennas at the transmitting and receiving ends, thereby improving communication quality and greatly improving spectrum utilization.

[0003] With the development of communication equipment, communication equipment is becoming increasingly miniaturized, multifunctional and intelligent. In the MIMO antenna system, if the distance between antennas is too small, the mutual coupling between antennas will become stronger and the communication performance will be reduced. Therefore, improving the isolation between antennas and reducing the coupling between antennas are urgent issues to be solved. Summary of the invention

[0004] Embodiments of the present application provide an antenna structure and an electronic device.

[0005] The technical solution of this application is implemented as follows:

[0006] An embodiment of the present application provides an antenna structure, including: a substrate, a first antenna and a second antenna;

[0007] The first antenna includes a first feeding component and a first slot hole provided on the substrate; the second antenna includes a second feeding component, and a second slot hole and a third slot hole provided on the substrate;

[0008] The second slot hole and the third slot hole are symmetrically arranged about the symmetry axis of the first slot hole;

[0009] The first feeding component is used to feed the first slot hole so that the first excitation current of the first antenna is symmetrical on the substrate in the positive direction of the symmetry axis of the first slot hole;

[0010] The second feeding component is used to feed the second slot and the third slot so that the second excitation current of the second antenna is anti-symmetrical about the symmetry axis of the first slot on the substrate.

[0011] Optionally, the first slot, the second slot, and the third slot are arranged inside the substrate.

[0012] Optionally, the length of the first slot is half of the wavelength corresponding to the center frequency point in the first frequency band; the first frequency band is the frequency band in which the first antenna works;

[0013] The lengths of the second slot and the third slot are both half of the wavelength corresponding to the center frequency point in the second frequency band; the second frequency band is the frequency band in which the second antenna works.

[0014] Optionally, the first antenna is a wireless high fidelity (Wireless Fidelity, WiFi) antenna, and the second antenna is a Bluetooth antenna;

[0015] or,

[0016] The first antenna is a Bluetooth antenna, and the second antenna is a WiFi antenna.

[0017] Optionally, the first feeding component is used to feed a first signal into a first slot body portion of the first slot hole, and to feed a second signal into a second slot body portion of the first slot hole; the first signal and the second signal have the same amplitude and phase;

[0018] The first slot body portion and the second slot body portion are symmetrical about the symmetry axis.

[0019] Optionally, the first feeding component includes a first feeder and a first coupling feeding terminal;

[0020] The first coupling feeding end is coupled and connected to the first slot at the symmetry axis;

[0021] The first feeder feeds the first signal to the first slot body part through the first coupling feeding end, and feeds the second signal to the second slot body part.

[0022] Optionally, the first feeding component includes a first feeder and an in-phase power divider;

[0023] The first feeder is electrically connected to the input end of the in-phase power divider; the first output end of the in-phase power divider is electrically connected to the first end of the first slot; the second output end of the in-phase power divider is electrically connected to the second end of the first slot;

[0024] The first feeder feeds the first signal to the first slot portion through the first output end of the in-phase power divider, and the first feeder feeds the second signal to the second slot portion through the second output end of the in-phase power divider.

[0025] Optionally, the second feeding component is used to feed a third signal into the second slot, and to feed a fourth signal into the third slot;

[0026] The third signal and the fourth signal have the same amplitude and opposite phases.

[0027] Optionally, the second feeding component includes a second feeder, an inverting power divider, a second coupling feeding terminal, and a third coupling feeding terminal;

[0028] The second feeder is electrically connected to the input end of the inverting power divider; the first output end of the inverting power divider is electrically connected to the second coupling feed end, and the second output end of the inverting power divider is electrically connected to the third coupling feed end;

[0029] The second coupling feeding end is coupled and connected to the second slot at the symmetry axis of the second slot;

[0030] The third coupling feeding end is coupled and connected to the third slot at the symmetry axis of the third slot;

[0031] The second feeder feeds the third signal to the second slot through the second coupling feeding end; the second feeder feeds the fourth signal to the third slot through the third coupling feeding end.

[0032] Optionally, the second feeding component includes a second feeder and an inverting power divider;

[0033] The second feeder is electrically connected to the input end of the inverting power divider; the first output end of the inverting power divider is electrically connected to the second slot, and the second output end of the inverting power divider is electrically connected to the third slot;

[0034] The second feeder feeds the third signal to the second slot through the first output end of the inverting power divider;

[0035] The second feeder feeds the fourth signal to the third slot through the second output end of the inverting power divider.

[0036] Optionally, the first slot, the second slot and the third slot are arranged in a circle.

[0037] An embodiment of the present application also provides an electronic device, which includes the above-mentioned antenna structure.

[0038] The antenna structure provided by the embodiment of the present application includes: a substrate, a first antenna and a second antenna; the first antenna includes a first feeding component and a first slot hole provided on the substrate; the second antenna includes a second feeding component, and a second slot hole and a third slot hole provided on the substrate; the second slot hole and the third slot hole are symmetrically provided with the symmetry axis of the first slot hole; the first feeding component is used to feed the first slot hole so that the first excitation current of the first antenna is positively symmetrical with the symmetry axis of the first slot hole on the substrate; the second feeding component is used to feed the second slot hole and the third slot hole so that the second excitation current of the second antenna is reversely symmetrical with the symmetry axis of the first slot hole on the substrate. That is to say, in the antenna structure provided by the embodiment of the present application, the first excitation current is positively symmetrical with respect to the symmetry axis of the first slot hole, and the second excitation current is reversely symmetrical with respect to the symmetry axis of the first slot hole, so that the energy coupled between the first excitation current and the second excitation current on both sides of the symmetry axis can offset each other, so as to realize the decoupling of the first antenna and the second antenna, and improve the isolation between the first antenna and the second antenna, so that the first antenna and the second antenna can work simultaneously without interfering with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 An antenna structure schematic diagram provided in an embodiment of the present application Figure 1 ;

[0040] Figure 2A A schematic diagram of current distribution of a first excitation current provided in an embodiment of the present application;

[0041] Figure 2B A schematic diagram of current distribution of a second excitation current provided in an embodiment of the present application;

[0042] Figure 3A A schematic diagram of a differential mode antenna provided in an embodiment of the present application;

[0043] Figure 3B A schematic diagram of a sum-mode antenna provided in an embodiment of the present application;

[0044] Figure 3C A schematic diagram of a sum and differential mode decoupling provided in an embodiment of the present application;

[0045] Figure 4A A second schematic diagram of an antenna structure provided in an embodiment of the present application;

[0046] Figure 4B A schematic diagram of an antenna structure provided in an embodiment of the present application is shown in FIG3;

[0047] Figure 5 A schematic diagram of an S-parameter simulation result provided in an embodiment of the present application;

[0048] Fig. 6AA directional diagram curve of a first antenna provided in an embodiment of the present application when the azimuth plane is 90° and the elevation plane;

[0049] Figure 6B A directional diagram curve of a directional plane of a first antenna provided in an embodiment of the present application when the directional plane is 90°;

[0050] Fig. 7A A directional diagram curve of a second antenna provided in an embodiment of the present application when the azimuth plane is 90°, on a pitch plane;

[0051] Figure 7B A directional diagram curve of a directional plane of a second antenna provided in an embodiment of the present application when the directional plane is 90°. DETAILED DESCRIPTION

[0052] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present invention.

[0053] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0054] As one of the key technologies in the development of communication technology, wireless MIMO technology can use antenna diversity technology without increasing the frequency band bandwidth and total transmission power, greatly improving the spectrum utilization rate. In the MIMO antenna structure, multiple antennas need to be set up in a limited space, which will undoubtedly increase the coupling between antennas. The MIMO antenna in the related technology also adds a slot structure for decoupling, and the coupling coefficient is usually -24.1dB, and there is still a problem of poor isolation. In addition, by adding slots to the metal edges of electronic devices, the aesthetics of the electronic devices will also be affected.

[0055] Based on this, an embodiment of the present application provides an antenna structure, which includes: a substrate, a first antenna and a second antenna; the first antenna includes a first feeding component and a first slot hole provided on the substrate; the second antenna includes a second feeding component, and a second slot hole and a third slot hole provided on the substrate; the second slot hole and the third slot hole are symmetrically arranged with respect to the symmetry axis of the first slot hole; the first feeding component is used to feed the first slot hole, so that the first excitation current of the first antenna is positively symmetrical with respect to the symmetry axis of the first slot hole on the substrate; the second feeding component is used to feed the second slot hole and the third slot hole, so that the second excitation current of the second antenna is reversely symmetrical with respect to the symmetry axis of the first slot hole on the substrate. That is to say, in the antenna structure provided by the embodiment of the present application, the first excitation current is positively symmetrical with respect to the symmetry axis of the first slot hole, and the second excitation current is reversely symmetrical with respect to the symmetry axis of the first slot hole, and the energy coupled between the first excitation current and the second excitation current on both sides of the symmetry axis can offset each other, so as to realize the decoupling of the first antenna and the second antenna, and improve the isolation between the first antenna and the second antenna, so that the first antenna and the second antenna can work simultaneously without interfering with each other.

[0056] In some embodiments, the antenna structure provided in the embodiment of the present application can be applied to the electronic device provided in the embodiment of the present application. The electronic device provided in the embodiment of the present application can be a wireless communication device, where the wireless communication device can be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. The wireless communication device can communicate with one or more core networks via a wireless access network (e.g., RAN, Radio Access Network). The wireless communication device can be a mobile terminal, such as a mobile phone (or a "cellular" phone) or a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges language and / or data with the wireless access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and other devices. A wireless communication device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a user equipment.

[0057] In some embodiments, the electronic device may also be a wearable wireless communication device such as a smart watch or smart glasses.

[0058] Figure 1 The antenna structure provided in the embodiment of the present application is shown in FIG. Figure 1 ,like Figure 1 As shown, the antenna structure adopted in the embodiment of the present application may include: a substrate 11, a first antenna 12 and a second antenna 13.

[0059] Here, the substrate may be a printed circuit board with a glass fiber board or a ceramic board as a base material, or a flexible circuit board, which is not limited in the embodiment of the present application.

[0060] It should be understood that the antenna structure provided in the embodiment of the present application may be a MIMO antenna structure, including two independent antenna units, namely a first antenna 12 and a second antenna 13 .

[0061] In the embodiment of the present application, the first antenna 12 and the second antenna 13 may be slot antennas.

[0062] The first antenna 12 may include a first feeding component 121 and a first slot 122 disposed on the substrate 11. The second antenna 13 includes a second feeding component 131, and a second slot 132 and a third slot 133 disposed on the substrate.

[0063] In the embodiment of the present application, the second slot hole 132 and the third slot hole 133 are symmetrically arranged about the symmetry axis of the first slot hole 122 .

[0064] It should be understood that the first slot 122 is a symmetrical structure, and the first slot 122 can be symmetrical with respect to a symmetry axis. For example, the first slot 122 can be a rectangular slot, and the corresponding first symmetry axis can be the central axis of the long side of the rectangular slot; the first slot 122 can also be a fan ring slot, and the corresponding first symmetry axis can be the straight line where the central angle bisector of the fan corresponding to the ring is located. The application embodiment does not limit the shape of the first slot.

[0065] For ease of description, the present application will refer to the symmetry axis of the first slot as the first symmetry axis.

[0066] In the embodiment of the present application, the second slot hole 132 and the third slot hole 133 may be respectively disposed on both sides of the first symmetry axis, and the second slot hole 132 and the third slot hole 133 are symmetrical with respect to the first symmetry axis.

[0067] It can be understood that the center point of the first slot 122, the center point of the second slot 132 and the center point of the third slot 133 are distributed in an isosceles triangle. The center point of the first slot 122 is the point where the two waists of the isosceles triangle intersect, and the center point of the second slot 132 and the center point of the third slot 133 are the points where the waist and the base of the isosceles triangle intersect.

[0068] In the embodiment provided in the present application, the first feeding component 121 is used to feed the first slot 122 so that the first excitation current of the first antenna 12 is positively symmetrical about the first symmetry axis on the substrate 11; the second feeding component 131 is used to feed the second slot 132 and the third slot 133 so that the second excitation current of the second antenna 13 is reversely symmetrical about the first symmetry axis on the substrate 11.

[0069] Here, the first slot 122 can be used as a radiator, and the first feeding component 121 can feed the first slot 122 by coupling or direct feeding. Specifically, the first feeding component 121 can feed an excitation signal to the first slot 122, and excite a first excitation current through the first slot 122, thereby radiating a wireless signal corresponding to the first antenna 12.

[0070] In the embodiment of the present application, the current distribution of the first excitation current is positively symmetric about the first symmetry axis on the substrate 11. The positive symmetry means that the first excitation currents on both sides of the first symmetry axis are of the same magnitude and flow in the same direction.

[0071] refer to Figure 2A As shown in the current distribution diagram of the first excitation current, the first excitation current of the first antenna 12 has the same current magnitude and the same current flow direction on both sides of the first symmetry axis.

[0072] In addition, the second slot 132 and the third slot 133 can be used as radiators, and the second feeding component 131 can feed the second slot 132 and the third slot 133 by coupling or direct feeding. Specifically, the second feeding component 131 can feed an excitation signal to the second slot 132 and the third slot 133, respectively, and excite a second excitation current through the second slot 132 and the third slot 133, thereby radiating a wireless signal corresponding to the second antenna 13.

[0073] In the embodiment of the present application, the current distribution of the second excitation current is reversely symmetric about the first symmetry axis on the substrate 11. The reverse symmetry means that the second excitation currents on both sides of the first symmetry axis have the same magnitude but flow in opposite directions.

[0074] refer to Figure 2B As shown in the current distribution diagram of the second excitation current, the second excitation current of the second antenna 13 has the same current magnitude on both sides of the first symmetry axis, but flows in opposite directions.

[0075] In the embodiment of the present application, since the first excitation current is positively symmetrical with respect to the first symmetry axis and the second excitation current is counter-symmetrical with respect to the first symmetry axis, by utilizing the principle of sum and differential mode decoupling, the energy coupled between the first excitation current and the second excitation current on both sides of the first symmetry axis can offset each other, thereby achieving a decoupling effect.

[0076] The following is a detailed introduction to the differential mode decoupling principle.

[0077] refer to Figure 3A The differential mode antenna structure shown, and Figure 3B Here, both the differential mode antenna and the sum mode antenna are symmetrical two-wire fed dipoles.

[0078] Among them, Figure 3AThe differential antenna structure in the circuit is fed, so that Figure 3A The currents excited in the two symmetrical wires are equal in magnitude and opposite in direction. That is, Figure 3A The current 1 in the left wire is equal to the current 2 in the right wire, but flows in opposite directions.

[0079] In addition, Figure 3B The sum-mode antenna structure in the feeder makes Figure 3B The magnitude and direction of the current excited in the two symmetrical wires are equal, that is, Figure 3B The current 3 in the left wire is equal to the current 4 in the right wire, and the current flows in the same direction.

[0080] Further, Figure 3A The differential mode fed antenna structure in Figure 3B The sum-mode fed antenna structure is placed symmetrically, and we can get Figure 3C Specifically, due to the antenna structure shown Figure 3B The currents 3 and 4 of the neutral mode antenna have the same direction along the y-axis, so the currents 3 and 4 can be combined into Figure 3C The current shown is 5.

[0081] In practical applications, refer to Figure 3C As shown, the energy coupled from the differential mode antenna to the sum mode antenna can be composed of the energy coupled from current 1 to current 5 and the energy coupled from current 2 to current 5. Due to symmetry, the energy coupled from current 1 to current 5 and the energy coupled from current 2 to current 5 have the same amplitude. Moreover, since the current direction of current 1 is opposite to that of current 5, the phase difference of the electromagnetic energy coupled from current 1 to current 5 is -180°; since the current direction of current 2 is the same as that of current 5, the phase of the electromagnetic energy coupled from current 2 to current 5 is 0°. In this way, the energy coupled from current 1 to current 5 and the energy coupled from current 2 to current 5 are of equal amplitude and anti-phase, and therefore cancel each other out. Finally, there is no energy coupling between the differential mode antenna structure and the sum mode antenna structure, and the isolation between the two is high.

[0082] That is to say, the differential mode antenna structure satisfies the reverse symmetry of the current distribution relative to the symmetry axis (meaning that the currents on both sides of the symmetry axis are the same in magnitude, but the currents flow in opposite directions), and the sum mode antenna structure satisfies the forward symmetry of the current distribution relative to the symmetry axis (meaning that the currents on both sides of the symmetry axis are the same in magnitude, and the currents flow in the same direction). Placing the sum mode antennas symmetrically can obtain a high isolation antenna pair.

[0083] It can be seen that in the embodiment of the present application, the second slot and the third slot are symmetrically arranged on both sides of the first symmetry axis of the first slot. In this way, the first antenna can be used as a sum-mode antenna, and the first excitation current generated by the first slot is positively symmetric with respect to the first symmetry axis, while the second antenna can be used as a differential-mode antenna, and the second excitation current generated by the second slot and the third slot is reversely symmetric with respect to the first symmetry axis. In this way, the energy coupled by the first excitation current and the second excitation current on both sides of the first symmetry axis is equal in amplitude and opposite in direction, and the energies cancel each other out, thereby obtaining a first antenna and a second antenna with high isolation.

[0084] In one embodiment of the present application, the first slot 122, the second slot 132, and the third slot 133 are disposed inside the substrate 11. Here, the inside of the substrate 11 may be a region away from the edge of the substrate 11 and not in contact with the outside.

[0085] It is understandable that by disposing the first slot 122 , the second slot 132 , and the third slot 133 inside the substrate 11 , it is possible to avoid opening gaps at the edge of the substrate 11 , thereby improving the aesthetics of the electronic device.

[0086] It should be noted that the embodiment of the present application provides a first slot 122 , a second slot 132 or a third slot 133 , which may or may not penetrate the substrate 11 , and the embodiment of the present application does not limit this.

[0087] In one embodiment of the present application, the length of the first slot 122 is half of the wavelength of the center frequency point in the first frequency band; the first frequency band is the frequency band in which the first antenna 12 works.

[0088] In addition, the lengths of the second slot 132 and the third slot 133 are both half of the wavelength of the center frequency point in the second frequency band; the second frequency band is the frequency band in which the second antenna 13 works.

[0089] It is understandable that each slot in the embodiment of the present application operates in a half-wavelength mode. In practical applications, the length of each slot can be set according to the frequency band of the wireless signal in which the antenna operates. Specifically, if the first antenna 12 operates in the first frequency band, the length of the first slot 122 is set to half of the wavelength corresponding to the center frequency of the first frequency band. If the second antenna 13 operates in the second frequency band, the length of the second slot 132 and the third slot 133 is set to half of the wavelength corresponding to the center frequency of the second frequency band.

[0090] In some embodiments, the first frequency band may be the same as the second frequency band, or may be different from the second frequency band, which is not limited in the embodiments of the present application.

[0091] In some embodiments, the first antenna 12 and the second antenna 13 may both operate in a frequency band of 2.4-2.5 GHz. For example, the first antenna 12 may be a WiFi antenna, and the second antenna 13 may be a Bluetooth antenna. Alternatively, the first antenna 12 is a Bluetooth antenna, and the second antenna 13 is a WiFi antenna. The embodiment of the present application does not limit the types of the first antenna 12 and the second antenna 13.

[0092] The following describes in detail the manner of feeding power to the first antenna 12 .

[0093] In the embodiment of the present application, the first feeding component 121 can feed the first slot 122 in a forward symmetrical manner.

[0094] Specifically, the first feeding component 121 is used to feed a first signal into the first slot body portion of the first slot hole 122, and to feed a second signal into the second slot body portion of the first slot hole 122; the amplitude and phase of the first signal and the second signal are the same; wherein the first slot body portion and the second slot body portion are symmetrical about the first symmetry axis.

[0095] Here, the first signal and the second signal are electromagnetic wave signals with the same amplitude and phase.

[0096] It should be understood that in order to achieve that the first excitation current generated by the first antenna 12 is positively symmetrical about the first symmetry axis, the first slot 122 can be set as a symmetrical structure in the embodiment of the present application, and the slot body of the first slot 121 can be symmetrical about the first symmetry axis. Exemplarily, the portion of the first slot 122 located on the left side of the first symmetry axis can be called the first slot body portion, and the portion of the first slot 122 located on the right side of the first symmetry axis can be called the second slot body portion.

[0097] In the embodiment of the present application, the first feeding component 121 feeds electromagnetic wave signals with equal amplitude and phase to the first slot body part and the second slot body part located on both sides of the first symmetry axis at the first symmetry axis position of the first slot hole 122. In this way, the first excitation current generated by the first antenna 12 is positively symmetrical on the substrate 11 about the first symmetry axis.

[0098] In a possible implementation, the first feeding component 121 may feed power to the first slot 122 by coupling.

[0099] Exemplary, reference Figure 4A As shown in the second schematic diagram of the antenna structure, in the embodiment of the present application, the first feeding component 121 may include a first feeder 1211 and a first coupling feeding terminal 1212;

[0100] The first coupling feeding end 1212 is coupled to the first slot 122 at the first symmetry axis; the first feeder 1211 feeds a first signal to the first slot portion and a second signal to the second slot portion through the first coupling feeding end 1212 .

[0101] It should be understood that the first feeding component 121 can feed the first slot 122 by coupling, that is, the first feeding component 121 may not be in direct contact with the first slot 122, and by coupling, electromagnetic wave signals with the same amplitude and phase are fed to both sides of the first symmetry axis of the first slot 122 through the first coupling feeding end 1212.

[0102] In another possible implementation, the first feeding component 122 may feed power to the first slot 122 in a direct feeding manner.

[0103] Exemplary, reference Figure 4B As shown in the third schematic diagram of the antenna structure, in the embodiment of the present application, the first feeding component 121 may include a first feeder 1211 and an in-phase power divider 1213;

[0104] The first feeder 1211 is electrically connected to the input end of the in-phase power divider 1213 ; the first output end of the in-phase power divider 1213 is electrically connected to the first end of the first slot 122 ; the second output end of the in-phase power divider 1213 is electrically connected to the second end of the first slot 122 .

[0105] The first feeder 1211 feeds a first signal to the first slot portion through a first output end of the in-phase power divider 1213 , and the first feeder 1211 feeds a second signal to the second slot portion through a second output end of the in-phase power divider 1213 .

[0106] Here, the first end and the second end are two short-circuit ends of the first slot 122. Figure 4B As shown, the first end may be located at the leftmost side of the first slot hole 122 , and the second end may be located at the rightmost side of the first slot hole 122 .

[0107] In the embodiment of the present application, the first feeder 1211 can divide the electromagnetic wave signal fed into two electromagnetic wave signals (i.e., the first signal and the second signal) with the same amplitude and phase through a one-to-two in-phase power divider. Further, the two electromagnetic wave signals are fed into the two ends of the first slot 122 through the in-phase power divider, so that the first excitation current excited by the first slot 122 can be forward symmetrical on both sides of the first symmetry axis.

[0108] It should be noted that the first feeder 1211 and the in-phase power divider 1213 can be arranged on the first symmetry axis, that is, the first feeder 1211 and the in-phase power divider 1213 are at the same distance from the first end and the second end of the first slot 122. In addition, the first output end of the in-phase power divider 1213 can be electrically connected to the first end of the first slot 122 across the gap of the first slot body part, and similarly, the second output end of the in-phase power divider 1213 can be electrically connected to the second end of the first slot 122 across the gap of the second slot body part, so as to feed electromagnetic wave signals with the same amplitude and phase to the first end and the second end of the first slot 122, respectively. In this way, it is ensured that the first excitation current excited is not interfered by the current of other external components.

[0109] The following is a detailed description of the method for feeding power to the second antenna.

[0110] In the embodiment of the present application, the second feeding component 131 can feed the second slot 132 and the third slot 133 in reverse symmetry.

[0111] Specifically, the second feeding component 131 may feed a third signal into the second slot 132 , and feed a fourth signal into the third slot 133 ; wherein the third signal and the fourth signal have the same amplitude and opposite phases.

[0112] Here, the third signal and the fourth signal are electromagnetic wave signals with the same amplitude and opposite phases.

[0113] It should be understood that in order to achieve the second excitation current generated by the second antenna 13 to be reversely symmetric about the first symmetry axis, the second slot 132 and the third slot 133 in the second antenna 13 may be arranged to be symmetric with respect to the first symmetry axis.

[0114] In this way, the first feeding component 131 feeds electromagnetic wave signals with the same amplitude but opposite phases to the second slot 132 and the third slot 133 respectively, so that the second excitation current generated by the second antenna 13 is reversely symmetric about the first symmetry axis on the substrate.

[0115] In a possible implementation, the second feeding component 131 may feed power to the second slot 132 and the third slot 133 in a coupling manner.

[0116] Exemplary, reference Figure 4A As shown in the second schematic diagram of the antenna structure, the second feeding component 131 includes a second feeder 1311 , an inverting power divider 1312 , a second coupling feeding terminal 1313 , and a third coupling feeding terminal 1314 .

[0117] The second feeder 1311 is electrically connected to the input end of the inverting power divider 1312; the first output end of the inverting power divider 1312 is electrically connected to the second coupling feed end 1313; the second output end of the inverting power divider 1312 is electrically connected to the third coupling feed end 1314;

[0118] Furthermore, the second coupling feeding end 1313 is coupled to the second slot 132 at the symmetry axis of the second slot 132 ; the third coupling feeding end 1313 is coupled to the third slot 132 at the symmetry axis of the third slot 132 .

[0119] In the embodiment of the present application, the second feeder 1311 feeds the third signal to the second slot 132 through the second coupling feeding terminal 1313 ; the second feeder 1311 feeds the fourth signal to the third slot 133 through the third coupling feeding terminal 1314 .

[0120] In the embodiment of the present application, the second feeder 1311 can divide the electromagnetic wave signal fed by the second feeder 1311 into two electromagnetic wave signals (i.e., the third signal and the fourth signal) with the same amplitude but opposite phases through a one-to-two reverse power divider 1312. Further, the two electromagnetic wave signals are transmitted to the second coupling feed end 1313 and the third coupling feed end 1314 through the reverse power divider 1312.

[0121] In some embodiments, the second slot 132 and the third slot 133 may also be symmetrical structures. In this way, the second coupling feeding terminal 1313 may be located at the center of the second slot 132, that is, at the symmetry axis of the second slot 132, and the third signal transmitted by the inverting power divider 1312 is fed into the second slot 132 by coupling. In addition, the third coupling feeding terminal 1314 may be located at the center of the third slot 133, that is, at the symmetry axis of the third slot 133, and the fourth signal transmitted by the inverting power divider 1312 is fed into the third slot 133 by coupling. By feeding signals with the same amplitude and opposite phases to the second slot 132 and the third slot 133, respectively, the second excitation currents excited by the second slot 132 and the third slot 133 can be anti-symmetrical on both sides of the first symmetry axis.

[0122] In another possible implementation, the second feeding component 131 may also feed the second slot 132 and the third slot 133 in a direct feeding manner.

[0123] Exemplary, reference Figure 4B As shown in the third schematic diagram of the antenna structure, the second feeding component 131 includes a second feeder 1311 and an inverting power divider 1312 .

[0124] The second feeder 1311 is electrically connected to the input end of the inverting power divider 1312; the first output end of the inverting power divider 1312 is electrically connected to the second slot 132; the second output end of the inverting power divider 1312 is electrically connected to the third slot 133;

[0125] The second feeder 1311 feeds a third signal to the second slot 132 through the first output end of the inverting power divider 1312 ; the second feeder 1311 feeds a fourth signal to the third slot 133 through the second output end of the inverting power divider.

[0126] In the embodiment of the present application, the second feeder 1311 can divide the electromagnetic wave signal fed by the second feeder 1311 into two electromagnetic wave signals (ie, the third signal and the fourth signal) with the same amplitude but opposite phases through a one-to-two reverse power divider 1312.

[0127] In the embodiment of the present application, the first output end of the inverting power divider 1312 can be directly connected to the two ends of the second slot 132 through a metal wire, and the second output end of the inverting power divider 1312 can be directly connected to the two ends of the third slot 133 through a metal wire.

[0128] In this way, the second feeder 1311 feeds the two electromagnetic wave signals into the second slot 132 and the third slot 133 respectively by direct feeding through the inverting power divider 1312. Since the second slot 132 and the third slot 133 are symmetrical about the first symmetry axis, the second excitation current can be reversely symmetrical on both sides of the first symmetry axis by feeding the third signal and the fourth signal with the same amplitude but opposite phases.

[0129] It should be noted that in the antenna structure provided in the embodiment of the present application, the first feeding component 121 and the second feeding component 131 can simultaneously use coupling to feed the first slot 122, the second slot 132 and the third slot 133, and the first feeding component 121 and the second feeding component 131 can also simultaneously use direct feeding to feed the first slot 122, the second slot 132 and the third slot 133. In addition, in the embodiment of the present application, the first feeding component 121 can use coupling to feed the first slot 122, and the second feeding component 131 can use direct feeding to feed the second slot 132 and the third slot 133; or, the first feeding component 121 can use direct feeding to feed the first slot 122, and the second feeding component 131 can use coupling to feed the second slot 132 and the third slot 133. The embodiment of the present application does not limit the feeding method of feeding the three slots.

[0130] In some embodiments, the first slot 122 , the second slot 132 , and the third slot 133 form a circular arrangement.

[0131] refer to Figure 1 , Figure 4A and Figure 4B As shown, the first slot 122, the second slot 132 and the third slot 133 may be fan-ring slots, that is, the first slot 122, the second slot 132 and the third slot 133 are in the shape of fan-rings. The center angles of the first slot 122, the second slot 132 and the third slot 133 are the same, and the center of the first slot 122 is the same as the center of the second slot 132 and the third slot 133.

[0132] In this way, the first slot 122, the second slot 132 and the third slot 133 can be arranged in a circle. When the electronic device is a smart watch, the antenna structure can facilitate the design of the smart watch.

[0133] In the embodiment of the present application, by arranging the second slot 132 and the third slot 133 on both sides of the symmetry axis of the first slot 122, the first excitation current excited by the first antenna 12 can be forward symmetrical on both sides of the first symmetry axis, and the second excitation current excited by the second antenna 13 can be reverse symmetrical on both sides of the first symmetry axis. In this way, by utilizing the principle of differential mode decoupling, a high degree of isolation between the first antenna and the second antenna can be achieved, so that the first antenna and the second antenna can work simultaneously without interfering with each other.

[0134] refer to Figure 5 The S parameter simulation result diagram is shown in the figure. 1,1 Characterizes the reflection coefficient of the first antenna 12, S 2,2 Characterizes the reflection coefficient of the second antenna 13, S 1,2 and S 2,1 Characterizes the coupling coefficient between the first antenna 12 and the second antenna 13. Figure 5 It can be seen that when the first antenna 12 and the second antenna 13 work at 2.4-2.5 GHz, the coupling coefficient between the two is below -30 dB, which is smaller than the coupling coefficient in other frequency bands. This indicates that when the first antenna 12 and the second antenna 13 work at 2.4-2.5 GHz, the isolation between the two is higher than that of other antennas in the related art.

[0135] in addition, Fig. 6A It also shows the directional curve of the elevation plane when the azimuth plane of the first antenna is 90° (ie, Phi=90°). Fig. 6A The curve in represents the radiation capability of the first antenna 12 at various angles in the elevation plane (also called the vertical plane, ie, Theta). Figure 6B The directional diagram curve of the first antenna when the directional plane is 90° (ie, Phi = 90°) is shown. Figure 6B The curve in represents the radiation capability of the first antenna 12 at various angles in the directional plane.

[0136] from Fig. 6A and Figure 6B It can be seen that the direction in which the radiation capability of the first antenna 12 is the largest is the elevation plane, so the main polarization of the first antenna 12 is Gain (Theta), and the cross-polarization ratio of the first antenna 12 is 40 dB.

[0137] in addition, Fig. 7A It also shows the directional curve of the elevation plane when the azimuth plane of the second antenna is 90° (ie, Phi = 90°). Fig. 7A The curve in represents the radiation capability of the second antenna 13 at various angles in the elevation plane (also called the vertical plane, ie, Theta). Figure 7B The directional diagram curve of the directional plane when the directional plane of the second antenna is 90° (ie, Phi = 90°) is shown. Figure 7B The curve in represents the radiation capability of the second antenna 13 at various angles in the directional plane. Fig. 7A and Figure 7B It can be seen that the maximum radiation direction of the second antenna 13 is the directional plane, the main polarization of the first antenna 12 is Gain (Phi), and the cross-polarization ratio of the second antenna 13 is 49 dB.

[0138] It can be seen from the above simulation structure that in the antenna structure provided by the present application, the main polarization directions of the first antenna and the second antenna are different, and two relatively pure linearly polarized radiating antennas can be realized.

[0139] It can be seen that the antenna structure provided in the embodiment of the present application can not only obtain a first antenna and a second antenna with high isolation, but also realize two relatively pure linearly polarized radiating antennas.

[0140] Based on the above embodiments, the embodiments of the present application may also provide an electronic device, which may include the antenna structure in the above embodiments. The antenna structure may include: a substrate, a first antenna and a second antenna;

[0141] The first antenna includes a first feeding component and a first slot hole provided on the substrate; the second antenna includes a second feeding component, and a second slot hole and a third slot hole provided on the substrate;

[0142] The second slot hole and the third slot hole are symmetrically arranged about the symmetry axis of the first slot hole;

[0143] The first feeding component is used to feed the first slot hole so that the first excitation current of the first antenna is symmetrical on the substrate in the positive direction of the symmetry axis of the first slot hole;

[0144] The second feeding component is used to feed the second slot and the third slot so that the second excitation current of the second antenna is anti-symmetrical about the symmetry axis of the first slot on the substrate.

[0145] In some embodiments, the first slot, the second slot, and the third slot are disposed inside the substrate.

[0146] In some embodiments, the length of the first slot is half of the wavelength corresponding to the center frequency point in the first frequency band; the first frequency band is the frequency band in which the first antenna works;

[0147] The lengths of the second slot and the third slot are both half of the wavelength corresponding to the center frequency point in the second frequency band; the second frequency band is the frequency band in which the second antenna works.

[0148] In some embodiments, the first frequency band is the same as the second frequency band.

[0149] In some embodiments, the first antenna is a WiFi antenna and the second antenna is a Bluetooth antenna;

[0150] or,

[0151] The first antenna is a Bluetooth antenna, and the second antenna is a WiFi antenna.

[0152] In some embodiments, the first feeding component is used to feed a first signal into a first slot body portion of the first slot hole, and to feed a second signal into a second slot body portion of the first slot hole; the first signal and the second signal have the same amplitude and phase;

[0153] The first slot body portion and the second slot body portion are symmetrical about the symmetry axis.

[0154] In some embodiments, the first feeding component includes a first feeder and a first coupling feeding terminal;

[0155] The first coupling feeding end is coupled and connected to the first slot at the symmetry axis;

[0156] The first feeder feeds the first signal to the first slot body part through the first coupling feeding end, and feeds the second signal to the second slot body part.

[0157] In some embodiments, the first feeding component includes a first feeder and an in-phase power divider;

[0158] The first feeder is electrically connected to the input end of the in-phase power divider; the first output end of the in-phase power divider is electrically connected to the first end of the first slot; the second output end of the in-phase power divider is electrically connected to the second end of the first slot;

[0159] The first feeder feeds the first signal to the first slot portion through the first output end of the in-phase power divider, and the first feeder feeds the second signal to the second slot portion through the second output end of the in-phase power divider.

[0160] In some embodiments, the second feeding component is used to feed a third signal to the second slot, and to feed a fourth signal to the third slot;

[0161] The third signal and the fourth signal have the same amplitude and opposite phases.

[0162] In some embodiments, the second feeding component includes a second feeder, an inverting power divider, a second coupled feeding terminal, and a third coupled feeding terminal;

[0163] The second feeder is electrically connected to the input end of the inverting power divider; the first output end of the inverting power divider is electrically connected to the second coupling feed end, and the second output end of the inverting power divider is electrically connected to the third coupling feed end;

[0164] The second coupling feeding end is coupled and connected to the second slot at the symmetry axis of the second slot;

[0165] The third coupling feeding end is coupled and connected to the third slot at the symmetry axis of the third slot;

[0166] The second feeder feeds the third signal to the second slot through the second coupling feeding end; the second feeder feeds the fourth signal to the third slot through the third coupling feeding end.

[0167] In some embodiments, the second feeding component includes a second feeder and an inverting power divider;

[0168] The second feeder is electrically connected to the input end of the inverting power divider; the first output end of the inverting power divider is electrically connected to the second slot, and the second output end of the inverting power divider is electrically connected to the third slot;

[0169] The second feeder feeds the third signal to the second slot through the first output end of the inverting power divider;

[0170] The second feeder feeds the fourth signal to the third slot through the second output end of the inverting power divider.

[0171] In some embodiments, the first slot, the second slot and the third slot are arranged in a circle.

[0172] The electronic device provided in the embodiment of the present application may be a wireless communication device, where the wireless communication device may be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. The wireless communication device may communicate with one or more core networks via a wireless access network (e.g., RAN, Radio Access Network). The wireless communication device may be a mobile terminal, such as a mobile phone (or a "cellular" phone) or a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a wireless access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and other devices. A wireless communication device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a user equipment.

[0173] In some embodiments, the electronic device may also be a wearable wireless communication device such as a smart watch or smart glasses.

[0174] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0175] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0176] In addition, all functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be separately configured as a unit, or at least two units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0177] A person of ordinary skill in the art can understand that: all or part of the steps of implementing the above-mentioned method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium, which, when executed, executes the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, disks or optical disks.

[0178] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiment of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

[0179] It should be noted that the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0180] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An antenna structure, characterized in that: include: a substrate, a first antenna and a second antenna; The first antenna includes a first feeding component and a first slot provided on the substrate; The second antenna includes a second feeding component, and a second slot and a third slot provided on the substrate; The second slot hole and the third slot hole are symmetrically arranged about the symmetry axis of the first slot hole; The first feeding component is used to feed a first signal into a first slot body portion of the first slot hole, and to feed a second signal into a second slot body portion of the first slot hole, wherein the first signal has the same amplitude and phase as the second signal; the first slot body portion and the second slot body portion are symmetrical about the symmetry axis, so that the first excitation current of the first antenna is symmetrical about the symmetry axis of the first slot hole on the substrate; The second feeding component is used to feed a third signal into the second slot and a fourth signal into the third slot; the third signal and the fourth signal have the same amplitude and opposite phase, so that the second excitation current of the second antenna is anti-symmetrical about the symmetry axis of the first slot on the substrate.

2. The antenna structure according to claim 1, characterized in that: The first slot hole, the second slot hole, and the third slot hole are disposed inside the substrate.

3. The antenna structure according to claim 1, characterized in that: The length of the first slot is half of the wavelength corresponding to the center frequency point in the first frequency band; the first frequency band is the frequency band in which the first antenna works; The lengths of the second slot and the third slot are both half of the wavelength corresponding to the center frequency point in the second frequency band; the second frequency band is the frequency band in which the second antenna works.

4. The antenna structure according to any one of claims 1 to 3, characterized in that: The first antenna is a wireless high-fidelity WiFi antenna, and the second antenna is a Bluetooth antenna; or, The first antenna is a Bluetooth antenna, and the second antenna is a WiFi antenna.

5. The antenna structure according to any one of claims 1 to 3, characterized in that: The first feeding component includes a first feeder and a first coupling feeding terminal; The first coupling feeding end is coupled and connected to the first slot at the symmetry axis; The first feeder feeds the first signal to the first slot body part through the first coupling feeding end, and feeds the second signal to the second slot body part.

6. The antenna structure according to any one of claims 1 to 3, characterized in that: The first feeding component includes a first feeder and an in-phase power divider; The first feeder is electrically connected to the input end of the in-phase power divider; the first output end of the in-phase power divider is electrically connected to the first end of the first slot; the second output end of the in-phase power divider is electrically connected to the second end of the first slot; The first feeder feeds the first signal to the first slot portion through the first output end of the in-phase power divider, and the first feeder feeds the second signal to the second slot portion through the second output end of the in-phase power divider.

7. The antenna structure according to any one of claims 1 to 3, characterized in that: The second feeding component includes a second feeder, an inverting power divider, a second coupling feeding terminal, and a third coupling feeding terminal; The second feeder is electrically connected to the input end of the inverting power divider; the first output end of the inverting power divider is electrically connected to the second coupling feed end, and the second output end of the inverting power divider is electrically connected to the third coupling feed end; The second coupling feeding end is coupled and connected to the second slot at the symmetry axis of the second slot; The third coupling feeding end is coupled and connected to the third slot at the symmetry axis of the third slot; The second feeder feeds the third signal to the second slot through the second coupling feeding end; and the second feeder feeds the fourth signal to the third slot through the third coupling feeding end.

8. The antenna structure according to any one of claims 1 to 3, characterized in that: The second feeding component includes a second feeder and an inverting power divider; The second feeder is electrically connected to the input end of the inverting power divider; the first output end of the inverting power divider is electrically connected to the second slot, and the second output end of the inverting power divider is electrically connected to the third slot; The second feeder feeds the third signal to the second slot through the first output end of the inverting power divider; The second feeder feeds the fourth signal to the third slot through the second output end of the inverting power divider.

9. The antenna structure according to any one of claims 1 to 3, characterized in that: The first slot hole, the second slot hole and the third slot hole are arranged in a circle.

10. An electronic device, characterized in that: Comprising the antenna structure as described in any one of claims 1-9.

Images