Antenna structure and electronic equipment

Abstract

This application discloses an antenna structure and electronic device, belonging to the field of communication technology. The antenna structure includes: an antenna cavity with a radiating opening on its side, N feed positions symmetrical about the central axis of the radiating opening, where N is an integer greater than 1; and a feed module including a feed source and a phase modulation circuit. The output terminal of the feed source is electrically connected to the input port of the phase modulation circuit, which has N output ports, each corresponding to one of the N feed positions. Under the action of the phase modulation circuit, the N output ports output either N in-phase feed signals or N out-of-phase feed signals.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to an antenna structure and electronic device. Background Technology

[0002] Currently, cavity antennas are prone to generating mixed modes during operation, which in turn affects the antenna's radiation performance. For example, regarding the commonly used Transverse Electric (TE) 10 and TE20 modes, the TE10 mode can be understood as the fundamental mode of the resonant cavity, while the TE20 mode can be understood as a higher-order mode with a cutoff frequency close to that of the TE10 mode in the frequency domain. Specifically, the TE10 mode is generated when the operating frequency is higher than the cutoff frequency of the TE10 mode; similarly, the TE20 mode is generated when the operating frequency is higher than the cutoff frequency of the TE20 mode. Since there are no effective suppression measures, the TE10 mode also exists at this time. In other words, when the operating frequency is higher than the cutoff frequency of the TE20 mode, both the TE20 and TE10 modes coexist, meaning the antenna generates mixed modes.

[0003] It is evident that cavity antennas in related technologies are prone to generating mixed modes during operation, which can affect the antenna's radiation performance. Summary of the Invention

[0004] This application aims to provide an antenna structure and electronic device that can solve the problem of the influence of mixed modes excited during the operation of cavity antennas on the radiation performance of the antenna in related technologies.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application propose an antenna structure, including:

[0007] An antenna cavity has a radiating opening on its side, and N feeding positions are provided on the radiating opening. The N feeding positions are symmetrical with respect to the central axis of the radiating opening, and N is an integer greater than 1.

[0008] A power supply module, comprising a feed source and a phase modulation circuit, wherein the output terminal of the feed source is electrically connected to the input port of the phase modulation circuit, and the phase modulation circuit has N output ports, and the N output ports are connected one-to-one with the N power supply positions;

[0009] Under the action of the phase modulation circuit, the N output ports are used to output N in-phase feed signals or N out-of-phase feed signals.

[0010] Secondly, embodiments of this application propose an electronic device including the antenna structure described in the first aspect.

[0011] In the embodiments of this application, based on the phase modulation circuit, N output ports can output N in-phase feed signals or N out-of-phase feed signals, and the antenna structure can suppress the second TE mode when stimulating the first TE mode, thereby avoiding the stimulation of mixed modes and making the stimulation mode purer, thus achieving the effect of improving the radiation performance of the antenna.

[0012] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0014] Figure 1 This is one of the structural schematic diagrams of the antenna cavity provided in the embodiments of this application;

[0015] Figure 2 This is one of the schematic diagrams of the antenna structure provided in the embodiments of this application;

[0016] Figure 3a This is one of the schematic diagrams of a phase modulation circuit provided in an embodiment of this application;

[0017] Figure 3b This is a second schematic diagram of a phase modulation circuit provided in an embodiment of this application;

[0018] Figure 4a A schematic diagram of a battery vector in TE10 mode under in-phase feeding provided in an embodiment of this application;

[0019] Figure 4b A schematic diagram of a battery vector in TE10 mode under reverse-phase feeding, provided for an embodiment of this application;

[0020] Figure 4c A vector diagram of a battery in TE20 mode under in-phase feeding, provided for an embodiment of this application;

[0021] Figure 4d A vector diagram of a battery in TE20 mode under reverse-phase feeding, provided for an embodiment of this application;

[0022] Figure 5a The electric field vector distribution diagram of the TE20 mode under the traditional feeding method;

[0023] Figure 5b The electric field vector distribution diagram of the TE20 mode under in-phase feeding method;

[0024] Figure 5cThe electric field vector distribution diagram of the TE10 mode under the traditional feeding method;

[0025] Figure 5d The electric field vector distribution diagram for the TE10 mode under in-phase feeding;

[0026] Figure 6 This is the second schematic diagram of the antenna cavity structure provided in the embodiments of this application;

[0027] Figure 7 This is a second schematic diagram of the antenna structure provided in the embodiments of this application;

[0028] Figure 8a This is a third schematic diagram of a phase modulation circuit provided in an embodiment of this application;

[0029] Figure 8b This is a fourth schematic diagram of a phase modulation circuit provided in an embodiment of this application;

[0030] Figure 9a The electric field vector distribution diagram of the TE30 mode under the traditional feeding method;

[0031] Figure 9b The electric field vector distribution diagram of the TE30 mode under in-phase feeding method;

[0032] Figure 10 This is a structural diagram of the antenna structure provided in an embodiment of this application. Detailed Implementation

[0033] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0034] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] like Figure 1 and Figure 2 As shown, this application embodiment provides an antenna structure, which includes:

[0037] The antenna cavity 10 has a radiation opening 11 on its side. N feed positions 12 are provided on the radiation opening 11, and the N feed positions 12 are symmetrical with respect to the central axis of the radiation opening 11, where N is an integer greater than 1.

[0038] The power supply module 20 includes a feed source 21 and a phase modulation circuit 22. The output terminal of the feed source 21 is electrically connected to the input port of the phase modulation circuit 22. The phase modulation circuit 22 has N output ports, and the N output ports are connected to N power supply positions one by one.

[0039] The aforementioned antenna cavity 10 can be understood as the cavity structure of a resonant cavity antenna, used to excite the antenna mode, such as to excite the TE mode.

[0040] The aforementioned radiating opening 11 is disposed on the side of the antenna cavity 10, which can be understood as the radiating opening 11 being disposed on a non-top or non-bottom surface of the antenna cavity 10.

[0041] For example, regarding such Figure 1 The antenna cavity 10 shown has a hexahedral structure. The antenna cavity 10 includes a top surface, a bottom surface, and four side surfaces located between the top surface and the bottom surface. The radiation opening 11 can be an opening structure on one of the four side surfaces, and the entire side surface on which the radiation opening 11 is provided is an opening structure. That is, one of the four side surfaces is an opening structure and serves as the radiation opening of the antenna cavity 10.

[0042] It should be noted that the antenna cavity 10 can be a rectangular cavity structure with a hexahedral structure, or a cavity structure with other polyhedral structures.

[0043] The aforementioned N feed positions 12 are symmetrical about the central axis of the radial opening 11, which can be understood as the N feed positions 12 being completely mirror-symmetrical about the central axis of the radial opening 11. For example, regarding... Figure 1The antenna cavity 10 shown includes two feed positions 12. The central axis of the radiating opening 11 can be understood as a virtual line dividing the radiating opening 11 into symmetrical parts. The two feed positions 12 are symmetrical with respect to the central axis. Figure 1 The virtual line 'a' shown is symmetrical.

[0044] The phase modulation circuit 22 described above is used to adjust the phase of the feed signal output to N feed positions 12.

[0045] Since the phase modulation circuit 22 has N output ports and the N output ports are electrically connected to the N feed positions 12, the phase of the feed signals output from the N output ports can be adjusted based on the phase modulation function of the phase modulation circuit 22 so that the N feed signals output from the N output ports are either in-phase or out-of-phase feed signals.

[0046] It is understandable that the above N-channel feed signals being in-phase feed signals can be interpreted as having a signal difference or phase difference of 0°; the above N-channel feed signals being out-of-phase feed signals can be interpreted as having a signal difference or phase difference of 180° between at least two of the N feed signals. For example, when N is 2, two out-of-phase feed signals can be interpreted as having a signal difference or phase difference of 180° between the two feed signals.

[0047] It's important to clarify that, currently, regarding the conventional TE10 and TE20 modes, the TE10 mode can be understood as the fundamental mode of the resonant cavity antenna, while the TE20 mode can be understood as a higher-order mode with a cutoff frequency immediately adjacent to the TE10 mode in the frequency domain. In some electronic products, such as tablets, the TE10 mode typically operates at 2.4GHz for Wi-Fi, while the TE20 mode typically operates at 5GHz for Wi-Fi. Furthermore, under conventional feeding methods, the TE10 mode will be generated when the antenna structure's operating frequency is higher than the TE10 mode's cutoff frequency; similarly, the TE20 mode will be generated when the antenna structure's operating frequency is higher than the TE20 mode's cutoff frequency. Simultaneously, due to the lack of effective suppression measures, the TE10 mode still exists; that is, when the operating frequency is higher than the TE10 mode's cutoff frequency, the TE20 and TE10 modes will coexist.

[0048] By adopting the antenna structure provided in this application embodiment, the phase modulation function based on the phase modulation circuit 22 enables N output ports to output N in-phase feed signals or N out-of-phase feed signals, and enables the antenna structure to suppress the second TE mode when exciting the first TE mode, thereby avoiding the excitation of mixed modes and making the excitation mode purer, thus achieving the effect of improving the radiation performance of the antenna.

[0049] The aforementioned N in-phase feed signals can be N equal-amplitude in-phase feed signals, and correspondingly, the aforementioned N out-of-phase feed signals can be N equal-amplitude out-of-phase feed signals. By setting the feed signals to equal-amplitude feed signals, the purity of the excited antenna mode can be further improved.

[0050] For example, when the N feed signals output from the N output ports are in-phase feed signals, higher-order modes such as TE20 mode can be suppressed, and only TE10 mode is generated; while when the N feed signals output from the N output ports are out-of-phase feed signals, TE10 mode can be suppressed, and only TE20 mode is generated.

[0051] Optionally, such as Figure 1 As shown, a first feed position 121 and a second feed position 122 are provided on the radiation opening 11, and the first feed position 121 and the second feed position 122 are symmetrical with respect to the central axis of the radiation opening 11.

[0052] The phase modulation circuit 22 includes a first power divider 221 and a first phase shifter 222. The input port of the first power divider 221 is electrically connected to the output port of the feed source 21. The first output port of the first power divider 221 is electrically connected to the input port of the first phase shifter 222. The output port of the first phase shifter 222 is electrically connected to the first feed position 121. The second output port of the first power divider 221 is electrically connected to the second feed position 122.

[0053] The first phase shifter 222 is used to adjust the phase of the feed signal output from the first output port of the first power divider 221.

[0054] In this embodiment, the phase of the feed signal output from the first output port of the first power divider 221 can be adjusted based on the first phase shifter 222, so that the feed signal output from the output port of the first phase shifter 222 and the feed signal output from the second output port of the first power divider 221 are either in-phase or out-of-phase feed signals, thereby avoiding the excitation of a mixed mode and achieving the effect of improving the radiation performance of the antenna.

[0055] In some implementations, when the phase modulation circuit 22 needs to output an in-phase feed signal, it can be based on, for example... Figure 3a The phase modulation circuit shown is used for implementation. For example... Figure 3a As shown, the phase modulation circuit 22 includes a first port, an equal amplitude and in-phase power divider, a second port, and a third port. The first port is used to be electrically connected to the output terminal of the feed source 21, the second port is used to be electrically connected to the first feed position 121, and the third port is used to be electrically connected to the second feed position 122. With this configuration, the second port and the third port can output equal amplitude and in-phase feed signals and achieve excitation of the target TE mode.

[0056] In other implementations, it can be based on Figure 3b The phase modulation circuit shown enables the output of either in-phase or out-of-phase fed signals. For example... Figure 3b As shown, the phase modulation circuit 22 includes a first port, an equal-amplitude power divider, a phase shifter, a second port, and a third port. The feed signal output from the second port is a feed signal whose phase has been adjusted by the phase shifter, so that the feed signals output from the second port and the feed signals output from the third port are either in-phase or out-of-phase. Specifically, when the two feed signals output from the second and third ports are in-phase, the antenna structure can operate in the first TE mode; and when the two feed signals output from the second and third ports are out-of-phase, the antenna structure can operate in the second TE mode.

[0057] in, Figure 3b The second port in can be understood as Figure 2 The output port of the first phase shifter 222 in the middle, Figure 3b The third port in can be understood Figure 2 The second output port of the first power divider 221 in the middle; Figure 3b The first port in can be understood as Figure 2 The input port of the first power divider 221 in the circuit.

[0058] For example, the first TE mode can be set to TE10 mode and the second TE mode to TE20 mode. When the two feed signals output by the phase modulation circuit 22 are in phase, the generation of TE20 mode can be suppressed and only TE10 mode can be generated.

[0059] Please see Figures 4a to 4d , Figure 4a A schematic diagram of a battery vector in TE10 mode under in-phase feeding provided in an embodiment of this application; Figure 4b A schematic diagram of a battery vector in TE10 mode under reverse-phase feeding, provided for an embodiment of this application; Figure 4c A vector diagram of a battery in TE20 mode under in-phase feeding, provided for an embodiment of this application; Figure 4d A vector diagram of a battery in TE20 mode under reverse-phase feeding, provided in an embodiment of this application.

[0060] Specifically, such as Figure 4a and 4c As shown, when the feed signals output to the first feed position 121 and the second feed position 122 are in-phase feed signals, the TE20 mode "collapses" into the TE10 mode, that is, the TE20 mode no longer exists, and only the TE10 mode is generated. Furthermore, since the TE20 mode is suppressed, the TE10 mode in the dual-feed in-phase feed mode is purer.

[0061] like Figure 4b and 4d As shown, when the feed signals output to the first feed position 121 and the second feed position 122 are inverted feed signals, the TE10 mode is suppressed and only the TE20 mode is generated.

[0062] Furthermore, since the feed signals output to the first feed position 121 and the second feed position 122 are in-phase feed signals, the radiation opening 11 does not have a TE20 mode, but only a TE10 mode. Moreover, in the TE10 mode, the electric field vectors are in the same direction (e.g., ...). Figure 4a As shown), near-field environmental loss is low, which can also improve the radiation efficiency of the antenna structure, and correspondingly, the specific absorption ratio (SAR) value will increase. Similarly, when using reverse-phase feeding, the TE10 mode will be suppressed, and only the TE20 mode will be excited. Furthermore, because there is an equal amount of reverse electric field vector at the same aperture in the TE20 mode (e.g., ... Figure 4d As shown in the figure, the near-field environment has high losses, which reduces the radiation efficiency of the antenna structure, but also reduces the SAR value.

[0063] Please see Figures 5a to 5d , Figure 5a The electric field vector distribution diagram of the TE20 mode under the traditional feeding method; Figure 5b The electric field vector distribution diagram of the TE20 mode under in-phase feeding method; Figure 5c The electric field vector distribution diagram of the TE10 mode under the traditional feeding method; Figure 5d This is the electric field vector distribution diagram for the TE10 mode under in-phase feeding. (Example:) Figures 5a to 5d As shown, it includes an antenna cavity 10, a feed position 12, and a corresponding electric field vector distribution pattern 50.

[0064] Specifically, Figure 5a The electric field vector distribution diagram 50 shown is the electric field vector distribution diagram of a traditional single-fed resonator in TE20 mode; Figure 5b The electric field vector distribution diagram 50 shown is the electric field vector distribution diagram of the doubly fed resonant cavity in TE20 mode provided in this application; Figure 5c The electric field vector distribution diagram 50 shown is the electric field vector distribution diagram of a traditional single-fed resonator in TE10 mode; Figure 5d The electric field vector distribution diagram 50 shown is the electric field vector distribution diagram of the doubly fed resonant cavity in TE10 mode provided in this application. Based on... Figures 5a to 5d As shown in the electric field vector distribution diagram, by adopting the in-phase feeding method provided in this application, the asymmetry of the electric field vector distribution diagram can be effectively improved, and the radiation effect of the antenna structure can be enhanced.

[0065] It is understandable that the TE10 mode mentioned above can also be replaced by TE30 mode, TE50 mode, TE70 mode, etc., or by TE11 mode, TE31 mode, TE51 mode, etc.; the TE20 mode mentioned above can be replaced by TE40 mode, TE60 mode, TE80 mode, etc., or by TE21 mode, TE41 mode, TE61 mode, etc.

[0066] Optionally, such as Figure 6 As shown, a third feed position 123, a fourth feed position 124 and a fifth feed position 125 are provided on the radiation opening 11. The fourth feed position 124 is set directly opposite the central axis of the radiation opening 11, and the third feed position 123 and the fifth feed position 125 are symmetrical with respect to the central axis of the radiation opening 11.

[0067] like Figure 7 As shown, the phase modulation circuit 22 includes a second power divider 223, a third power divider 224, a second phase shifter 225, a third phase shifter 226, and a switch 227. The input port of the second power divider 223 is electrically connected to the output terminal of the feed source 21. The first output port of the second power divider 223 is electrically connected to the input port of the second phase shifter 225. The output port of the second phase shifter 225 is electrically connected to the third feed position 123. The second output port of the second power divider 223 is electrically connected to the input port of the third power divider 224. The first output port of the third power divider 224 is electrically connected to the input port of the third phase shifter 226. The output port of the third phase shifter 226 is electrically connected to the input port of the switch 227. The output port of the switch 227 is electrically connected to the fourth feed position 124. The second output port of the third power divider 224 is electrically connected to the fifth feed position 125.

[0068] The second phase shifter 225 is used to adjust the phase of the feed signal output from the first output port of the second power divider 223, and the third phase shifter 226 is used to adjust the phase of the feed signal output from the first output port of the third power divider 224.

[0069] In this embodiment, the phase adjustment circuit described above can be used to flexibly adjust the phase of the three feed signals transmitted to the three feed positions, thereby enabling individual excitation of three different TE modes, avoiding mixed-mode excitation, and effectively improving the antenna's radiation performance.

[0070] In some implementations, when the phase modulation circuit 22 needs to output an in-phase feed signal, it can be based on, for example... Figure 8a The phase modulation circuit shown is used for implementation. For example... Figure 8aAs shown, the phase modulation circuit 22 includes a first port, an equal amplitude and in-phase power divider, a second port, a third port, and a fourth port. The first port is used to electrically connect to the output terminal of the feed source 21, the second port is used to electrically connect to the third feed position 123, the third port is used to electrically connect to the fourth feed position 124, and the fourth port is used to electrically connect to the fifth feed position 125. With this configuration, the second port and the third port can output equal amplitude and in-phase feed signals and achieve excitation of the target TE mode.

[0071] In other implementations, it can be based on Figure 8b The phase modulation circuit shown enables the output of either in-phase or out-of-phase fed signals. For example... Figure 8b As shown, the phase modulation circuit 22 includes a first port, two power dividers, two phase shifters, a switch, a second port, a third port, and a fourth port. The feed signal output from the second port is the feed signal after phase adjustment by one of the phase shifters, and the feed signal output from the third port can also be the feed signal after phase adjustment by the other phase shifter. By setting the phase shifters, the feed signals output from the second port and the fourth port can be out of phase, and the feed signals output from the third port and the fourth port can be in phase; or the feed signals output from the third port and the fourth port can be out of phase, and the feed signals output from the second port and the fourth port can be in phase, thereby realizing individual excitation of different TE modes.

[0072] in, Figure 8b The second port in can be understood as Figure 7 The output port of the second phase shifter 225 in the middle; Figure 8b The third port in can be understood as Figure 7 The output port of switch 227 in the middle; Figure 8b The fourth port in the diagram can be understood as the second output port of the third power divider 224; Figure 8b The first port in the diagram can be understood as the input port of the second power divider 223.

[0073] It is understandable that the three-port power supply in this embodiment can better control TE30 mode, TE50 mode, etc. For example, in TE30 mode, when the feed signals output from the output ports of the second phase shifter 225, the switch 227, and the third power divider 224 are in-phase feed signals, TE20 and TE30 modes are suppressed, and only TE10 mode is activated. At this time, the antenna structure has the highest radiation efficiency and the highest SAR value. When the feed signals output from the output ports of the second phase shifter 225 and the third power divider 224 are in-phase feed signals, and the feed signal output from the output port of the switch 227 is out of phase with the feed signals output from the second phase shifter 225 and the third power divider 224, then TE30 and TE10 modes are activated, and only TE20 mode is suppressed. At this time, the antenna structure has a high radiation efficiency and a high SAR value. When the feed signals output from the output ports of the second phase shifter 225 and the third power divider 224 are out-of-phase feed signals, and the switch 227 is open, then TE20 is activated, and TE30... The TE10 mode and the TE10 mode are suppressed, at which point the antenna structure has the lowest radiation efficiency and the lowest SAR value.

[0074] In practical applications, phase shifters and switches can be used, i.e. Figure 8b The phase modulation circuit shown converts the antenna efficiency requirement to the SAR value requirement. However, if only antenna efficiency is desired, a circuit like this can be used... Figure 8a The phase modulation circuit shown is used to achieve higher antenna efficiency.

[0075] It is understandable that the antenna efficiency mentioned above can be interpreted as the radiation efficiency of the antenna structure.

[0076] The aforementioned switch 227 can be a single-pole single-throw switch.

[0077] Please see Figure 9a and Figure 9b , Figure 9a The electric field vector distribution diagram of the TE30 mode under the traditional feeding method; Figure 9b This is the electric field vector distribution diagram for the TE30 mode under in-phase feeding. (See diagram for example.) Figures 9a to 9b As shown, it includes an antenna cavity 10, a feed position 12, and a corresponding electric field vector distribution pattern 50.

[0078] Specifically, Figure 9a The electric field vector distribution diagram 50 shown is the electric field vector distribution diagram of a traditional single-fed resonator in TE30 mode; Figure 9b The electric field vector distribution diagram 50 shown is the electric field vector distribution diagram of the multi-fed resonator provided in this application in TE30 mode. Based on... Figure 9a and Figure 9b As shown in the electric field vector distribution diagram, by adopting the in-phase feeding method provided in this application, the asymmetry of the electric field vector distribution diagram can be effectively improved, and the radiation effect of the antenna structure can be enhanced.

[0079] Optionally, such as Figure 10 As shown, the antenna structure also includes a control module 30 and a detection module 40, with the control module 30 electrically connected to the detection module 40 and the phase modulation circuit 22, respectively.

[0080] Specifically, when the detection module 40 does not detect a human body approaching the antenna cavity 10, the control module 30 controls the phase modulation circuit 22 to output a synchronous feed signal; when the detection module 40 detects a human body approaching the antenna cavity 10, the control module 30 controls the phase modulation circuit 22 to output a reverse-phase feed signal.

[0081] In this embodiment, the phase adjustment of the feed signal is achieved based on the distance between the human body and the antenna cavity 10, thereby reducing the impact of SAR value on the human body.

[0082] Specifically, when no human body is detected approaching the antenna cavity 10, i.e., when the distance between the human body and the antenna cavity 10 is relatively far, the phase modulation circuit 22 outputs an in-phase feed signal to reduce near-field losses and improve antenna efficiency. Conversely, when a human body is detected approaching the antenna cavity 10, i.e., when the distance between the human body and the antenna cavity 10 is relatively close, the phase modulation circuit 22 outputs an out-of-phase feed signal to reduce the SAR value during antenna operation and reduce the impact of the SAR value on the human body, thereby improving the performance of the antenna structure.

[0083] In some implementation methods, the following can be adopted: Figure 3a or Figure 8a The phase modulation circuit shown is used to ensure that the antenna structure is always fed with equal amplitude and in phase, thereby achieving higher antenna efficiency.

[0084] In other implementations, the following can be adopted: Figure 3b or Figure 8b The phase modulation circuit shown is used to ensure that the antenna structure can always maintain equal amplitude and reverse phase feeding, thereby achieving a lower SAR value.

[0085] The phase shifter in the above embodiments can be a device capable of performing phase shifting. For example, it can be an integrated device, a phase shifting structure, or a lumped parameter device with phase shifting functionality. The phase shifting structure can be a microstrip line, a coupled line (or a coupled structure), a parallel line, a stripline, etc.; the lumped parameter device refers to a lumped packaged device such as a capacitor or an inductor.

[0086] This application also provides an electronic device including the antenna structure described above.

[0087] It should be noted that the implementation method of the above antenna structure embodiment is also applicable to the embodiment of the electronic device and can achieve the same technical effect, so it will not be described again here.

[0088] Among them, electronic devices can be mobile phones, tablets, laptops, etc.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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.

[0090] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An antenna structure, characterized by include: An antenna cavity has a radiating opening on its side, and N feeding positions are provided on the radiating opening. The N feeding positions are symmetrical with respect to the central axis of the radiating opening, and N is an integer greater than 1. A power supply module, comprising a feed source and a phase modulation circuit, wherein the output terminal of the feed source is electrically connected to the input port of the phase modulation circuit, and the phase modulation circuit has N output ports, and the N output ports are connected one-to-one with the N power supply positions; Under the action of the phase modulation circuit, the N output ports are used to output N in-phase feed signals or N out-of-phase feed signals; When the N feed signals output from the N output ports are in-phase feed signals, the antenna structure operates in the first TE mode; when the N feed signals output from the N output ports are out-of-phase feed signals, the antenna structure operates in the second TE mode.

2. The antenna structure according to claim 1, characterized in that, The radiation opening is provided with a first feed position and a second feed position, and the first feed position and the second feed position are symmetrical with respect to the central axis of the radiation opening; The phase modulation circuit includes a first power divider and a first phase shifter. The input port of the first power divider is electrically connected to the output terminal of the feed source. The first output port of the first power divider is electrically connected to the input port of the first phase shifter. The output port of the first phase shifter is electrically connected to the first feed position. The second output port of the first power divider is electrically connected to the second feed position. The first phase shifter is used to adjust the phase of the feed signal output from the first output port of the first power divider.

3. The antenna structure according to claim 2, characterized in that, When the feed signals output from the output port of the first phase shifter and the second output port of the first power divider are in-phase feed signals, the antenna cavity excites the first transverse electric field TE mode. When the feed signals output from the output port of the first phase shifter and the second output port of the first power divider are inverted feed signals, the antenna cavity excites the second TE mode.

4. The antenna structure of claim 1, wherein, The radiation opening is provided with a third feed position, a fourth feed position and a fifth feed position. The fourth feed position is located directly opposite the central axis of the radiation opening, and the third feed position and the fifth feed position are symmetrical with respect to the central axis of the radiation opening. The phase modulation circuit includes a second power divider, a third power divider, a second phase shifter, a third phase shifter, and a switch. The input port of the second power divider is electrically connected to the output port of the feed source. The first output port of the second power divider is electrically connected to the input port of the second phase shifter. The output port of the second phase shifter is electrically connected to the third feed position. The second output port of the second power divider is electrically connected to the input port of the third power divider; the first output port of the third power divider is electrically connected to the input port of the third phase shifter; the output port of the third phase shifter is electrically connected to the input port of the switch; the output port of the switch is electrically connected to the fourth feed position; and the second output port of the third power divider is electrically connected to the fifth feed position. The second phase shifter is used to adjust the phase of the feed signal output from the first output port of the second power divider, and the third phase shifter is used to adjust the phase of the feed signal output from the first output port of the third power divider, thereby realizing individual excitation of the first TE mode, the second TE mode and the third TE mode.

5. The antenna structure according to claim 4, characterized in that, When the feed signals output from the output port of the second phase shifter, the output port of the switch, and the second output port of the third power divider are in-phase feed signals, the antenna cavity is excited in the first TE mode. When the feed signals output from the output ports of the second phase shifter and the second output port of the third power divider are inverted feed signals, and the switch is in the open circuit state, the antenna cavity excites the second TE mode.

6. The antenna structure according to claim 4, characterized in that, When the feed signals output from the output port of the second phase shifter and the second output port of the third power divider are in-phase feed signals, and the feed signals output from the output port of the switch and the second output port of the third power divider are out-of-phase feed signals, the antenna cavity excites the first TE mode and the third TE mode.

7. The antenna structure according to any one of claims 1 to 6, characterized in that, The antenna structure also includes a control module and a detection module, wherein the control module is electrically connected to the detection module and the phase modulation circuit, respectively. Specifically, when the detection module does not detect a human body approaching the antenna cavity, the control module controls the phase modulation circuit to output a synchronous feed signal; when the detection module detects a human body approaching the antenna cavity, the control module controls the phase modulation circuit to output a reverse-phase feed signal.

8. The antenna structure according to any one of claims 1 to 6, characterized in that, The N in-phase feed signals indicate that the phase difference between the N feed signals output from the N output ports is 0°; the N out-of-phase feed signals indicate that the phase difference between at least two of the N feed signals output from the N output ports is 180°.

9. The antenna structure according to claim 3, characterized in that, The output signals from the output port of the first phase shifter and the second output port of the first power divider are equal-amplitude, in-phase output signals. The output signals from the output port of the first phase shifter and the second output port of the first power divider are equal-amplitude, inverse-phase output signals.

10. An electronic device, characterized in that, The antenna structure includes any one of claims 1 to 9.

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