Antenna device and electronic equipment

Abstract

The invention provides an antenna device and electronic equipment, which can be used in the technical field of communication. The antenna device comprises an antenna branch knot and a phase shift circuit. The antenna branch comprises a feed-in branch and a parasitic branch, the first end of the feed-in branch and the first end of the parasitic branch are both grounded, and a coupling gap is arranged between the second end of the feed-in branch and the second end of the parasitic branch; the feed-in branch knot is provided with a first feed port, and the parasitic branch knot is provided with a second feed port; the input end of the phase shift circuit is connected with the radio frequency port, the first output end of the phase shift circuit is connected with the first feed port, and the second output end of the phase shift circuit is connected with the second feed port; the phase shift circuit is used for regulating and controlling the phase difference between a first radio frequency signal fed into the first feed port and a second radio frequency signal fed into the second feed port. The feed-in branch knot and the parasitic branch knot are excited at the same time through the phase shift circuit, the antenna radiation direction can be dynamically changed while the antenna directivity is improved, and omnidirectional coverage is achieved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to an antenna device and electronic device. Background Technology

[0002] Antenna devices are key components for electronic devices to achieve wireless communication functions. The directivity of an antenna device refers to its ability to radiate or receive electromagnetic waves in different directions in space, which directly affects the communication quality, coverage, and anti-interference capability of the antenna device.

[0003] For small electronic devices such as mobile phones and tablets, the ideal antenna device is to achieve omnidirectional coverage, that is, to radiate and receive signals relatively evenly in different directions. However, due to the limitations of device space, it is also necessary to meet the needs of multi-band communication, reduce environmental interference, and improve user experience. Therefore, it is difficult to achieve perfect omnidirectionality.

[0004] Therefore, for antenna devices of small electronic devices, due to limitations in device space and design, as well as the influence of environmental factors during use, there are often situations where the signal is weak in certain radiation directions or even there are radiation dead zones, which affects communication quality and user experience. Summary of the Invention

[0005] This application provides an antenna device and electronic device to solve the technical problem that existing antenna devices have weak signals in some radiation directions or even have radiation dead zones.

[0006] According to the first aspect disclosed in this application, this application provides an antenna device, including an antenna stub and a phase-shifting circuit;

[0007] The antenna stub includes a feed stub and a parasitic stub. The first end of the feed stub and the first end of the parasitic stub are both grounded. A coupling gap is provided between the second end of the feed stub and the second end of the parasitic stub. The feed stub is provided with a first feed port, and the parasitic stub is provided with a second feed port.

[0008] The input terminal of the phase shift circuit is connected to the radio frequency port, the first output terminal of the phase shift circuit is connected to the first feed port, and the second output terminal of the phase shift circuit is connected to the second feed port; wherein, the phase shift circuit is used to adjust the phase difference between the first radio frequency signal fed into the first feed port and the second radio frequency signal fed into the second feed port.

[0009] In one feasible implementation, the phase-shifting circuit includes a duplexer and a phase shifter;

[0010] The input terminal of the duplexer is connected to the radio frequency port, the first output terminal of the duplexer is connected to the first power supply port, and the second output terminal of the duplexer is connected to the second power supply port.

[0011] The phase shifter is connected between the first output terminal of the duplexer and the first feed port and / or between the second output terminal of the duplexer and the second feed port.

[0012] In one feasible implementation, the phase-shifting circuit includes a first branch and a second branch;

[0013] The first branch includes a single-pole double-throw (SPDT) switch, a first inductor, a resistor, and a fixed capacitor. The common terminal of the SPDT switch is connected to the radio frequency port. The first throw terminal of the SPDT switch is connected to the first terminal of the first inductor, and the second terminal of the first inductor is connected to the first feed port. The second throw terminal of the SPDT switch is connected to the first terminal of the resistor, and the second terminal of the resistor is connected to the first feed port. The first terminal of the fixed capacitor is connected to the first feed port, and the second terminal of the fixed capacitor is grounded.

[0014] The second branch includes a variable capacitor and a second inductor; the first end of the variable capacitor is connected to the RF port, and the second end of the variable capacitor is connected to the second feed port; the first end of the second inductor is connected to the second feed port, and the second end of the second inductor is grounded.

[0015] In one possible implementation, the length of the feeding branch is greater than the length of the parasitic branch.

[0016] In one feasible implementation, the first power supply port is located at the middle position of the feed branch.

[0017] In one feasible implementation, the second power supply port is located at a distance of 1 / 4λ from the second end of the parasitic stub; where λ represents the wavelength corresponding to the operating frequency of the parasitic stub.

[0018] In one feasible implementation, the first end of the feed branch and the first end of the parasitic branch are grounded to the metal casing or motherboard PCB of the electronic device.

[0019] In one feasible implementation, the phase difference between the first radio frequency signal and the second radio frequency signal is adjustable within the range of 0°-180°.

[0020] In one feasible implementation, the antenna stub operates at frequencies of 2.4 GHz-2.5 GHz and 5.15 GHz-5.85 GHz.

[0021] According to a second aspect disclosed in this application, this application provides an electronic device including an antenna device as described in any one of the first aspects.

[0022] Compared with the prior art, this application has the following advantages:

[0023] This application provides an antenna device and electronic device that utilizes a phase-shifting circuit to split the radio frequency (RF) signal at an RF port into two, feeding a first RF signal to a first feed port and a second RF signal to a second feed port. This allows the first RF signal to excite the feed stub and the second RF signal to excite the parasitic stub. By simultaneously exciting both the feed stub and the parasitic stub, the directivity of the antenna device is improved. Furthermore, the phase-shifting circuit can adjust the phase difference between the first and second RF signals, thereby dynamically changing the radiation direction of the antenna device to achieve omnidirectional coverage. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 This is a schematic diagram of the structure of an existing antenna device;

[0026] Figure 2 This is a schematic diagram of the S-parameters of an existing antenna device;

[0027] Figure 3 This is a schematic diagram of the radiation direction of an existing antenna device;

[0028] Figure 4 This is a schematic diagram of the structure of an antenna device provided in an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the structure of an antenna stub provided in an embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the S-parameters of an antenna device provided in an embodiment of this application;

[0031] Figure 7 This is a schematic diagram of the radiation direction of an antenna device provided in an embodiment of this application;

[0032] Figure 8 This is a schematic diagram of a phase-shifting circuit provided in an embodiment of this application;

[0033] Figure 9 A schematic diagram of the S-parameters of a phase shifter in an antenna device provided in this application embodiment at different phases;

[0034] Figure 10 A schematic diagram of the radiation direction of the phase shifter of an antenna device in different phases according to an embodiment of this application in the 5G band;

[0035] Figure 11 This is a schematic diagram of another phase-shifting circuit provided in an embodiment of this application;

[0036] Figure 12 A schematic diagram of the phase difference in another phase-shifting circuit provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100-antenna stub;

[0039] 101-Feeding branch;

[0040] 102-Parasitic branch;

[0041] 103 - First power supply port;

[0042] 104 - Motherboard PCB;

[0043] 105 - Second power supply port;

[0044] 200-RF port;

[0045] 300-Phase Shifting Circuit;

[0046] 301 - Duplexer;

[0047] 302 - Phase shifter.

[0048] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0049] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0050] Antenna devices are key components for enabling wireless communication in electronic devices. They are responsible for receiving and transmitting radio waves, converting data signals from within the electronic device into electromagnetic waves for transmission to the base station, and simultaneously converting electromagnetic waves from the base station into signals that the electronic device can process. The directivity of an antenna refers to its ability to radiate or receive electromagnetic waves in different directions in space. It is one of the core parameters of antenna performance, directly affecting the communication quality, coverage, and anti-interference capability of the antenna device.

[0051] For small electronic devices such as mobile phones and tablets, the ideal antenna device is to achieve omnidirectional coverage, that is, to radiate and receive signals relatively evenly in different directions. However, due to the limitations of device space (the internal space of the device is only a few centimeters), it is also necessary to meet the requirements of multi-band communication (covering multiple frequency bands from low frequency to high frequency, such as Sub-6GHz to millimeter wave), reduce environmental interference (for example, reduce the interference and impact of human body obstruction, metal body and internal component coupling on the antenna device), and improve user experience (for example, the device size is thin and light, and the design is not obtrusive). Therefore, it is difficult to achieve perfect omnidirectionality, and it is not possible to directly apply the solutions of large antennas (such as parabolic antennas and large array antennas).

[0052] Therefore, the antenna design of small electronic devices is usually optimized to balance space constraints, performance requirements, and aesthetics, taking into account the specific application scenarios. For example, they may adopt more compact and specially designed antenna structures, such as metal frame antennas, MDA (microstrip) antennas, or common linearly polarized antenna forms such as IFA (inverted F), Monopole, and Loop, in order to achieve better communication performance in a limited space.

[0053] See Figure 1 Taking a common IFA antenna with a parasitic stub 102 as an example, the long stub on the left is the feed stub 101. By feeding an RF signal into its feed port, resonance in the 2.4G and 5G frequency bands can be excited. The short stub on the right, as the parasitic stub 102, can also be excited to resonate in the 5G frequency band, thereby extending the bandwidth of the antenna device in the high-frequency range. At this time, the S-parameters of the antenna device are as follows: Figure 2 As shown, the radiation direction of the antenna device is as follows: Figure 3 As shown. Among them, Figure 3 Figure (a) shows the radiation pattern of the antenna device in the 2.4 GHz band. Figure 3 Figure (b) shows the radiation pattern of the antenna device in the 5G band.

[0054] It can be seen that for antenna devices of small electronic devices, due to limitations in device space and design, as well as the influence of environmental factors during use, there may be situations where the signal is weak in certain radiation directions or even there are radiation dead zones, which affects communication quality and user experience.

[0055] To address the aforementioned technical problems, this application proposes an antenna device and electronic device that simultaneously excites the feed stubs and parasitic stubs through phase-shifting electricity to improve the directivity of the antenna device. At the same time, it can also dynamically change the radiation direction of the antenna device through the phase-shifting circuit, enabling the antenna device to achieve omnidirectional coverage.

[0056] The technical solutions of the antenna device and electronic equipment provided in this application will be described in detail below through specific embodiments. It should be noted that the following embodiments may exist alone or in combination with each other, and the same or similar content may not be described again in different embodiments.

[0057] Figure 4 This is a schematic diagram of the structure of an antenna device provided in an embodiment of this application. (See attached diagram.) Figure 4 and Figure 5 In some embodiments, the antenna device includes an antenna stub 100 and a phase-shifting circuit 300. The antenna stub 100 includes a feed stub 101 and a parasitic stub 102. The first end of the feed stub 101 and the first end of the parasitic stub 102 are both grounded. A coupling gap is provided between the second end of the feed stub 101 and the second end of the parasitic stub 102. The feed stub 101 is provided with a first feed port 103, and the parasitic stub 102 is provided with a second feed port 105. The input terminal of the phase-shifting circuit 300 is connected to the radio frequency port 200, the first output terminal of the phase-shifting circuit 300 is connected to the first feed port 103, and the second output terminal of the phase-shifting circuit 300 is connected to the second feed port 105. The phase-shifting circuit 300 is used to adjust the phase difference between the first radio frequency signal fed into the first feed port 103 and the second radio frequency signal fed into the second feed port 105.

[0058] In this embodiment, the phase-shifting circuit 300 splits the radio frequency signal from the radio frequency port 200 into two, feeding a first radio frequency signal to the first feed port 103 and a second radio frequency signal to the second feed port 105. This allows the first radio frequency signal to excite the feed stub 101 and the second radio frequency signal to excite the parasitic stub 102. By simultaneously exciting both the feed stub 101 and the parasitic stub 102, the directivity of the antenna device is improved. Specifically, when simultaneously exciting both the feed stub 101 and the parasitic stub 102, the S-parameters of the antenna device are as follows: Figure 6 As shown, the radiation direction of the antenna device is as follows: Figure 7 As shown. Among them, Figure 7Figure (a) shows the radiation pattern of the antenna device in the 2.4 GHz band. Figure 7 Figure (b) shows the radiation pattern of the antenna device in the 5G band. It can be seen that, compared with the existing single-feed port antenna device, the coverage of the radiation direction of the antenna device with dual-feed port parallel feed structure is significantly improved.

[0059] Meanwhile, the phase shifting circuit 300 can also adjust the phase difference between the first radio frequency signal and the second radio frequency signal, thereby dynamically changing the radiation direction of the antenna device to achieve omnidirectional coverage.

[0060] Optionally, the phase difference between the first radio frequency signal and the second radio frequency signal can be adjusted within the range of 0°-180°.

[0061] By adjusting the phase difference between the first and second radio frequency signals between 0° and 180°, the omnidirectional adjustment of the antenna device's radiation direction can be achieved, thereby realizing omnidirectional coverage of the antenna device's radiation direction.

[0062] Specifically, RF port 200 is connected to an RF source, which is used to provide RF signals.

[0063] See Figure 5 Optionally, the first end of the feed branch 101 and the first end of the parasitic branch 102 are connected to the ground of the metal casing of the electronic device or the motherboard PCB 104.

[0064] Grounding provides a stable reference potential for the antenna stub 100. For the feed stub 101, connecting its first end to the metal casing of the electronic device or the motherboard PCB 104 allows for precise control of the antenna impedance, reducing signal reflection and improving signal transmission efficiency, thereby enhancing the antenna's radiation efficiency. For the parasitic stub 102, connecting its first end to the metal casing of the electronic device or the motherboard PCB 104 changes its equivalent circuit parameters, optimizes the coupling relationship between the parasitic stub 102 and the feed stub 101, further improves the antenna's impedance matching characteristics, and enables the antenna to achieve good performance over a wider frequency band.

[0065] Optionally, the antenna stub 100 can operate at frequencies of 2.4 GHz to 2.5 GHz and 5.15 GHz to 5.85 GHz.

[0066] The 2.4GHz-2.5GHz band has a longer wavelength, resulting in strong diffraction and penetration capabilities, enabling long-distance communication in complex environments with obstacles. However, this band suffers from numerous interference sources, limiting data transmission rates. The 5.15GHz-5.85GHz band offers wider bandwidth, supporting higher data transmission rates, while also experiencing less interference, stronger anti-interference capabilities, and providing stable signals. However, its penetration and diffraction capabilities are slightly weaker. By setting the antenna stub 100's operating frequencies to 2.4GHz-2.5GHz and 5.15GHz-5.85GHz, a combination of these frequencies can cater to different scenario requirements, improving device communication performance and user experience.

[0067] See Figure 5 In some embodiments, the length of the feed branch 101 is greater than the length of the parasitic branch 102.

[0068] Since the resonant frequency of an antenna is inversely proportional to its electrical length, the longer the antenna stub 100, the lower the resonant frequency it can generate; conversely, the shorter the antenna stub 100, the higher the resonant frequency it can generate. Because the 5G band is higher than the 2.4G band, by setting the length of the feed stub 101 to be greater than the length of the parasitic stub 102, the feed stub 101 can resonate in the 2.4G band, while the parasitic stub 102 mainly resonates in the 5G band.

[0069] See Figure 5 Optionally, the first power supply port 103 is located at the middle position of the power supply branch 101.

[0070] When the first feed port 103 is positioned in the middle of the feed stub 101, the current distribution on the feed stub 101 is relatively symmetrical. This symmetrical current distribution helps to generate a more uniform radiation field and improve the antenna's radiation efficiency. Feeding at the middle position allows for a more reasonable current amplitude and phase relationship in both directions of the stub, and to a certain extent, widens the antenna's operating bandwidth, enabling the antenna to maintain good performance over a wider frequency range, thus achieving good radiation performance in both the 2.4 GHz and 5 GHz bands.

[0071] See Figure 5 Optionally, the second power supply port 105 is located at a distance of 1 / 4λ from the second end of the parasitic stub 102; where λ represents the wavelength corresponding to the operating frequency of the parasitic stub 102.

[0072] By setting the feed port near 1 / 4λ of the preset frequency, the impedance transformation characteristics of the 1 / 4λ transmission line can be utilized to dynamically convert the load impedance (such as the input impedance of an antenna or circuit module) into a pure resistance value that matches the source impedance, thereby significantly reducing the reflection coefficient and improving power transmission efficiency. Simultaneously, by adjusting the transmission line length or combining it with aperture tuning techniques (such as variable capacitor compensation of load reactance), the stability of the input impedance can be maintained during frequency shifts, achieving dynamic impedance matching over a wide frequency band. Ultimately, this improves the system's radiation efficiency, signal integrity, and overall performance in the target frequency band.

[0073] See Figure 8 In some embodiments, the phase shifting circuit 300 includes a duplexer 301 and a phase shifter 302; the input terminal of the duplexer 301 is connected to the radio frequency port 200, the first output terminal of the duplexer 301 is connected to the first power supply port 103, and the second output terminal of the duplexer 301 is connected to the second power supply port 105; the phase shifter 302 is connected between the first output terminal of the duplexer 301 and the first power supply port 103 and / or between the second output terminal of the duplexer 301 and the second power supply port 105.

[0074] In this embodiment, the RF signal from the RF port 200 is split into two by a duplexer 301 to simultaneously excite the feed stub 101 and the parasitic stub 102, thereby improving the directivity of the antenna device. Then, the phase shifter 302 adjusts the phase difference between the first and second RF signals to change the radiation direction of the antenna device, achieving omnidirectional coverage.

[0075] Specifically, since the phase shifter 302 is connected between the first output terminal of the duplexer 301 and the first power supply port 103 and / or between the second output terminal of the duplexer 301 and the second power supply port 105, the phase shifter 302 can be configured in three ways: simultaneously configured on the paths of the feed stub 101 and the parasitic stub 102, or separately configured on the paths of the feed stub 101 or the parasitic stub 102.

[0076] See Figure 8 When phase shifters 302 are simultaneously placed on the paths of feed stub 101 and parasitic stub 102, the phase shifting circuit 300 includes two phase shifters 302. The input terminal of one phase shifter 302 is connected to the first output terminal of duplexer 301, and its output terminal is connected to the first feed port 103. The input terminal of the other phase shifter 302 is connected to the second output terminal of duplexer 301, and its output terminal is connected to the second feed port 105.

[0077] When the phase shifter 302 is placed on the path of the feed stub 101, the input terminal of the phase shifter 302 is connected to the first output terminal of the duplexer 301, and its output terminal is connected to the first power supply port 103.

[0078] See Figure 4 When the phase shifter 302 is placed on the path of the parasitic stub 102, the input terminal of the phase shifter 302 is connected to the second output terminal of the duplexer 301, and its output terminal is connected to the second power supply port 105.

[0079] Specifically, taking the phase shifter 302 connected between the second output terminal of the duplexer 301 and the second feed port 105 as an example, when the phase value of the phase shifter 302 is traversed from -180° to 180°, the S-parameters of the phase shifter 302 of the antenna device at different phases are as follows: Figure 9 As shown, the radiation direction of the 5G band of the phase shifter 302 of the antenna device at different phases is as follows: Figure 10 As shown.

[0080] in, Figure 10 Figure (a) shows the radiation pattern of the antenna device in the 5G band when the phase value of the phase shifter 302 is 0°;

[0081] Figure 10 Figure (b) shows the radiation pattern of the antenna device in the 5G band when the phase value of the phase shifter 302 is 30°;

[0082] Figure 10 Figure (c) shows the radiation pattern of the antenna device in the 5G band when the phase value of the phase shifter 302 is 60°;

[0083] Figure 10 Figure (d) in the figure shows the radiation pattern of the antenna device in the 5G band when the phase value of the phase shifter 302 is 90°;

[0084] Figure 10 Figure (e) shows the radiation pattern of the antenna device in the 5G band when the phase value of the phase shifter 302 is 120°;

[0085] Figure 10 Figure (f) in the figure shows the radiation pattern of the antenna device in the 5G band when the phase value of the phase shifter 302 is 150°;

[0086] Figure 10 Figure (g) shows the radiation pattern of the antenna device in the 5G band when the phase value of the phase shifter 302 is 180°.

[0087] See Figure 11In some embodiments, the phase-shifting circuit 300 includes a first branch and a second branch; the first branch includes a single-pole double-throw switch SP2T, a first inductor LS, a resistor Rs, and a fixed capacitor Cp; the common terminal of the single-pole double-throw switch SP2T is connected to the RF port 200, the first throw terminal of the single-pole double-throw switch SP2T is connected to the first terminal of the first inductor LS, and the second terminal of the first inductor LS is connected to the first feed port 103 (Ant port1); the second throw terminal of the single-pole double-throw switch SP2T is connected to the first terminal of the resistor Rs, and the second terminal of the resistor Rs is connected to the first feed port 103 (Ant port1); the first terminal of the fixed capacitor Cp is connected to the first feed port 103 (Ant port1), and the second terminal of the fixed capacitor Cp is grounded; the second branch includes a variable capacitor Cs and a second inductor Lp; the first terminal of the variable capacitor Cs is connected to the RF port 200, and the second terminal of the variable capacitor Cs is connected to the second feed port 105 (Ant port1). The second inductor Lp is connected to the second power supply port 105 (Ant port2); the first end of the second inductor Lp is connected to the second power supply port 105 (Ant port2), and the second end of the second inductor Lp is grounded.

[0088] In this embodiment, the first branch of the phase-shifting circuit 300 is connected in series with a first inductor LS or a series resistor Rs via a single-pole double-throw switch SP2T, and then in parallel with a fixed capacitor Cp; the second branch of the phase-shifting circuit 300 is connected in series with a variable capacitor Cs, and then in parallel with a second inductor Lp. When the single-pole double-throw switch SP2T is switched to the first throw position, making the first inductor LS pass through, the capacitance value of the tuning variable capacitor Cs can adjust the phase difference between the first RF signal and the second RF signal between 0° and 90°; when the single-pole double-throw switch SP2T is switched to the second throw position, making the resistor Rs pass through, the capacitance value of the tuning variable capacitor Cs can adjust the phase difference between the first RF signal and the second RF signal between 90° and 180°. Therefore, by combining the two switching states of the single-pole double-throw switch SP2T, phase difference tuning from 0° to 180° can be covered, thereby achieving omnidirectional control of the antenna directivity.

[0089] Furthermore, compared to the phase-shifting circuit 300 composed of duplexer 301 and phase shifter 302, the phase-shifting circuit 300 composed of components such as capacitors and inductors has a lower production cost while achieving the phase-shifting function.

[0090] Specifically, the resistance Rs is 0Ω, the inductance of the first inductor LS and the second inductor Lp is 1.5nH, the capacitance of the variable capacitor Cs ranges from 0.1 to 30pF, and the capacitance of the fixed capacitor Cp is 0.5pF.

[0091] Among them, see Figure 12In Figure (a), when the single-pole double-throw switch SP2T switches to the first inductor LS path and the variable capacitor Cs has a capacitance of 0.5pF, the phase difference between the first and second radio frequency signals is 180°. (See also...) Figure 12 In Figure (b), when the single-pole double-throw switch SP2T is switched to the resistor Rs path and the capacitance value of the variable capacitor Cs is 30pF, the phase difference between the first RF signal and the second RF signal is 0°.

[0092] In some embodiments, this application also provides an electronic device including the antenna device described above.

[0093] In this embodiment, by setting up a phase-shifting circuit 300, the directivity of the antenna device is improved by simultaneously exciting the feed stub 101 and the parasitic stub 102. At the same time, the radiation direction of the antenna device is dynamically changed by the phase-shifting circuit 300, so that the antenna device achieves omnidirectional coverage.

[0094] Specifically, for the adjustment of the phase difference between the first radio frequency signal and the second radio frequency signal, the radiation direction corresponding to each phase can be preset. In practical applications, the electronic device can determine the radiation direction that the antenna device needs to be adjusted to through the feedback of the RSSI (Received Signal Strength Indication) receiving sensitivity, and switch to the phase value corresponding to that radiation direction, thereby realizing the adjustment of the radiation direction.

[0095] Specifically, electronic devices can be various types of communication-capable devices, such as mobile phones, watches, tablets, etc.

[0096] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0097] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0098] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0099] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0100] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0101] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

[0102] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An antenna device, characterized in that, Including antenna stubs and phase-shifting circuits; The antenna stub includes a feed stub and a parasitic stub. The first end of the feed stub and the first end of the parasitic stub are both grounded. A coupling gap is provided between the second end of the feed stub and the second end of the parasitic stub. The feed stub is provided with a first feed port, and the parasitic stub is provided with a second feed port. The input terminal of the phase shift circuit is connected to the radio frequency port, the first output terminal of the phase shift circuit is connected to the first feed port, and the second output terminal of the phase shift circuit is connected to the second feed port; wherein, the phase shift circuit is used to adjust the phase difference between the first radio frequency signal fed into the first feed port and the second radio frequency signal fed into the second feed port.

2. The antenna device according to claim 1, characterized in that, The phase-shifting circuit includes a duplexer and a phase shifter; The input terminal of the duplexer is connected to the radio frequency port, the first output terminal of the duplexer is connected to the first power supply port, and the second output terminal of the duplexer is connected to the second power supply port. The phase shifter is connected between the first output terminal of the duplexer and the first feed port and / or between the second output terminal of the duplexer and the second feed port.

3. The antenna device according to claim 1, characterized in that, The phase-shifting circuit includes a first branch and a second branch; The first branch includes a single-pole double-throw (SPDT) switch, a first inductor, a resistor, and a fixed capacitor. The common terminal of the SPDT switch is connected to the radio frequency port. The first throw terminal of the SPDT switch is connected to the first terminal of the first inductor, and the second terminal of the first inductor is connected to the first feed port. The second throw terminal of the SPDT switch is connected to the first terminal of the resistor, and the second terminal of the resistor is connected to the first feed port. The first terminal of the fixed capacitor is connected to the first feed port, and the second terminal of the fixed capacitor is grounded. The second branch includes a variable capacitor and a second inductor; the first end of the variable capacitor is connected to the RF port, and the second end of the variable capacitor is connected to the second feed port; the first end of the second inductor is connected to the second feed port, and the second end of the second inductor is grounded.

4. The antenna device according to any one of claims 1-3, characterized in that, The length of the feeding branch is greater than the length of the parasitic branch.

5. The antenna device according to claim 4, characterized in that, The first power supply port is located at the middle position of the feed branch.

6. The antenna device according to claim 4, characterized in that, The second power supply port is located at a distance of 1 / 4λ from the second end of the parasitic branch; where λ represents the wavelength corresponding to the operating frequency of the parasitic branch.

7. The antenna device according to any one of claims 1-3, characterized in that, The first end of the feed branch and the first end of the parasitic branch are connected to the ground of the metal casing or motherboard PCB of the electronic device.

8. The antenna device according to any one of claims 1-3, characterized in that, The phase difference between the first radio frequency signal and the second radio frequency signal can be adjusted within the range of 0°-180°.

9. The antenna device according to any one of claims 1-3, characterized in that, The antenna stub operates at frequencies of 2.4GHz-2.5GHz and 5.15GHz-5.85GHz.

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

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