Antenna structure and electronic device

Abstract

The application discloses an antenna structure and an electronic device. The antenna structure comprises a ground structure, a slot is arranged on the ground structure, an antenna branch is connected with the ground structure and coupled with the slot, a first end of a power divider is electrically connected with the antenna branch, a second end of the power divider is used for feeding the slot, and a third end of the power divider is electrically connected with a feeding structure. In the antenna structure of the embodiment of the application, the radio frequency signal of which the power is distributed by the power divider is input to the antenna branch and the slot, the radio frequency signal can be distributed to the antenna branch and the slot according to the required power, the bandwidth of the antenna structure can be improved through the coupling of the antenna branch and the slot, the radiation efficiency of the antenna can be improved, and the performance of the antenna is enhanced.

Description

Technical Field

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

[0002] With the development of communication technology, the functionality, performance, and integration of mobile terminals are constantly improving. Furthermore, facing increasingly diverse usage scenarios and the pursuit of a superior device appearance, the available space for antenna devices in mobile terminals is continuously being compressed. Against this backdrop, not only is the number of antenna devices in mobile terminals increasing, but these devices also need to meet requirements for low headroom and miniaturization. Currently, patch antennas, loop antennas, IFA (Inverted-F Antenna) antennas, PIFA (Planar Inverted-F Antenna) antennas, and metal-framed antennas, which are widely used in mobile terminals, suffer from lower bandwidth and radiation efficiency due to the high level of device integration and limitations in the ground-mode they can excite, thus affecting the performance and user experience of mobile terminals. Summary of the Invention

[0003] The purpose of this application is to provide an antenna structure and electronic device to solve the problems of low bandwidth and low radiation efficiency of antenna devices.

[0004] In a first aspect, embodiments of this application provide an antenna structure, including:

[0005] A ground structure, wherein the ground structure is provided with grooves;

[0006] Antenna stub, the antenna stub being connected to the ground structure, and the antenna stub being coupled to the slot;

[0007] A power divider, wherein a first end of the power divider is electrically connected to the antenna stub, a second end of the power divider is fed by the slot, and a third end of the power divider is electrically connected to the feed structure.

[0008] The slot extends circumferentially along the ground structure, the antenna stub extends circumferentially along the ground structure, and the antenna stub is disposed on the outer periphery of the slot.

[0009] The groove is located in the edge region or corner of the ground structure.

[0010] Wherein, the slot is T-shaped, L-shaped, polygonal, circular, elliptical, or elongated; and / or

[0011] The land structure can be polygonal, circular, or elliptical.

[0012] The grooves are multiple, and the multiple grooves are spaced apart; and / or

[0013] The antenna stubs are multiple, and the multiple antenna stubs are spaced apart.

[0014] The antenna stubs are multiple, with at least two radiated signal frequencies differing, and also include:

[0015] A switching switch is provided, through which the antenna stub is electrically connected to the first terminal of the power divider, and the switching switch can connect either of the antenna stubs to the first terminal of the power divider.

[0016] The antenna stubs are multiple, and the first end of the power divider and each antenna stub are electrically connected via a phase-shifting circuit.

[0017] This also includes:

[0018] A first phase-shifting circuit, wherein a first terminal of the first phase-shifting circuit is electrically connected to the antenna stub, and a second terminal of the first phase-shifting circuit is electrically connected to the first terminal of the power divider.

[0019] This also includes:

[0020] The first matching circuit has a first terminal connected to one terminal of the first phase shifting circuit, and the antenna stub is electrically connected to the other terminal of the first matching circuit.

[0021] This also includes:

[0022] A second phase-shifting circuit is provided with its first end adjacent to the slot, and its second end is electrically connected to the second end of the power divider.

[0023] This also includes:

[0024] The second matching circuit has a first end connected to one end of the second phase shifting circuit, and the other end of the second matching circuit is located adjacent to the slot.

[0025] This also includes:

[0026] A third matching circuit, one end of which is electrically connected to the first end of the power divider, and the other end of which is electrically connected to the antenna stub; and / or

[0027] The fourth matching circuit has one end electrically connected to the second end of the power divider, and the other end of the fourth matching circuit is the slot feeder.

[0028] This also includes:

[0029] The fifth matching circuit is provided, wherein the third terminal of the power divider is electrically connected to one end of the fifth matching circuit, and the other end of the fifth matching circuit is used to be electrically connected to the power supply structure.

[0030] This also includes:

[0031] The chip has a first phase-shifting circuit and a second phase-shifting circuit. The first terminal of the first phase-shifting circuit is electrically connected to the antenna stub, and the second terminal of the first phase-shifting circuit is electrically connected to the first terminal of the power divider.

[0032] The first end of the second phase-shifting circuit is disposed adjacent to the slot, and the second end of the second phase-shifting circuit is electrically connected to the second end of the power divider.

[0033] The power divider is integrated on the chip.

[0034] The antenna structure operates at frequencies of 700MHz-960MHz or 1710MHz-1880MHz.

[0035] Secondly, embodiments of this application provide an electronic device including the antenna structure described in the above embodiments.

[0036] The electronic device further includes a frame, which serves as the ground structure.

[0037] The antenna structure of this embodiment includes: a ground structure with a slot; an antenna stub connected to the ground structure and coupled to the slot; and a power divider, with a first terminal electrically connected to the antenna stub, a second terminal feeding the slot, and a third terminal electrically connected to the feeding structure. In this embodiment, the ground structure has a slot, the antenna stub is coupled to the slot, and the third terminal of the power divider can be electrically connected to the feeding structure. The radio frequency (RF) signal fed into the feeding structure can be power-divided by the power divider. The RF signal with power divided by the power divider is input to the antenna stub and the slot, allowing the RF signal to be distributed to the antenna stub and slot according to the required power. The coupling between the antenna stub and the slot improves the bandwidth of the antenna structure, increases the antenna's radiation efficiency, and enhances its performance. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the antenna structure in one embodiment of this application;

[0039] Figure 2a This is a schematic diagram of the antenna structure in another embodiment of this application;

[0040] Figure 2b This is a schematic diagram of the antenna structure in another embodiment of this application;

[0041] Figure 2c This is a schematic diagram of the antenna structure in another embodiment of this application;

[0042] Figure 2d This is a schematic diagram of the antenna structure in another embodiment of this application;

[0043] Figure 2e This is a schematic diagram of the antenna structure in another embodiment of this application;

[0044] Figure 2f This is a schematic diagram of the antenna structure in another embodiment of this application;

[0045] Figure 2g This is a schematic diagram of the antenna structure in another embodiment of this application;

[0046] Figure 2h This is a schematic diagram of the antenna structure in another embodiment of this application;

[0047] Figure 2i This is a schematic diagram of the antenna structure in another embodiment of this application;

[0048] Figure 2j This is a schematic diagram of the antenna structure in another embodiment of this application;

[0049] Figure 3a This is a schematic diagram illustrating the groove arrangement in one embodiment of this application;

[0050] Figure 3b This is a schematic diagram illustrating the groove arrangement in another embodiment of this application;

[0051] Figure 3c This is a schematic diagram of the groove setting in another embodiment of this application;

[0052] Figure 3d This is a schematic diagram of the groove setting in another embodiment of this application;

[0053] Figure 3e This is a schematic diagram of the groove setting in another embodiment of this application;

[0054] Figure 3f This is a schematic diagram of the groove setting in another embodiment of this application;

[0055] Figure 4 This is a connection diagram of the antenna structure in one embodiment of this application;

[0056] Figure 5aThis is a connection diagram of the antenna structure in another embodiment of this application;

[0057] Figure 5b This is a connection diagram of the antenna structure in another embodiment of this application;

[0058] Figure 6 This is a connection diagram of the antenna structure in another embodiment of this application;

[0059] Figure 7a This is a connection diagram of the antenna structure in another embodiment of this application;

[0060] Figure 7b This is a connection diagram of the antenna structure in another embodiment of this application;

[0061] Figure 7c This is a connection diagram of the antenna structure in another embodiment of this application;

[0062] Figure 7d This is a connection diagram of the antenna structure in another embodiment of this application;

[0063] Figure 8 A schematic diagram showing the integration of antenna stubs with the ground structure;

[0064] Figure 9 for Figure 8 A schematic diagram of the S-parameters of the antenna structure;

[0065] Figure 10 A schematic diagram illustrating the fit between the slot and the ground structure;

[0066] Figure 11 for Figure 10 A schematic diagram of the S-parameters of the antenna structure;

[0067] Figure 12 This is a schematic diagram showing the location of a feed point in one embodiment of this application;

[0068] Figure 13 for Figure 12 A schematic diagram of the S-parameters of the antenna structure;

[0069] Figure 14 for Figure 12 A schematic diagram of the amplitude variation curve of the radio frequency signal corresponding to the antenna structure in the middle;

[0070] Figure 15 for Figure 12 A schematic diagram of the phase change curve of the radio frequency signal corresponding to the antenna structure in the middle;

[0071] Figure 16 for Figure 12 A schematic diagram of the efficiency curve of the antenna structure;

[0072] Figure 17a This is a connection diagram of the antenna structure in another embodiment of this application;

[0073] Figure 17b This is a connection diagram of the antenna structure in another embodiment of this application;

[0074] Figure 18 This is another schematic diagram of the efficiency curve of the antenna structure in the embodiments of this application;

[0075] Figure 19 This is a schematic diagram of the antenna structure in another embodiment of this application.

[0076] Figure Labels

[0077] Ground structure 10; Groove 11;

[0078] Antenna stub 20;

[0079] Power divider 30;

[0080] First phase-shifting circuit 41; Second phase-shifting circuit 42;

[0081] First matching circuit 51; Second matching circuit 52;

[0082] Third matching circuit 53; Fourth matching circuit 54;

[0083] Fifth matching circuit 55;

[0084] Chip 60;

[0085] Power supply structure 70. Detailed Implementation

[0086] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0087] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0088] The following is in conjunction with the appendix Figures 1 to 19 As shown, the antenna structure provided in this application will be described in detail through specific embodiments and application scenarios.

[0089] like Figures 1 to 7d As shown, the antenna structure of this embodiment includes: a ground structure 10, an antenna stub 20, and a power divider 30. The ground structure 10 has a slot 11. The shape of the ground structure 10 can be rectangular, circular, etc., and the specific shape can be selected according to actual conditions. The shape of the slot 11 can be T-shaped or L-shaped, and the slot 11 can penetrate the edge of the ground structure 10. The shape of the slot 11 can be selected according to actual conditions. The antenna stub 20 is connected to the ground structure 10, and the ground structure 10 can serve as the ground for the antenna stub 20. The antenna stub 20 and the ground structure 10 can be electrically connected, and the antenna stub 20 and the ground structure 10 can be integrally formed. The antenna stub 20 and the ground structure 10 can be conductive materials, such as metal. The antenna stub 20 and the slot 11 can be coupled, which can increase the bandwidth and efficiency of the antenna.

[0090] The first end of the power divider 30 is electrically connected to the antenna stub 20, and the first end of the power divider 30 and the antenna stub 20 can be electrically connected via a transmission line. The second end of the power divider 30 can be located adjacent to the slot 11, for example, the second end of the power divider 30 can be connected across the slot 11. The second end of the power divider 30 can feed power to the slot 11, and the opening of the slot 11 can be fed through the second end of the power divider 30. The second end of the power divider 30 can be connected across the slot 11 via a transmission line. The third end of the power divider 30 can be electrically connected to the feeding structure. The feeding structure can feed radio frequency (RF) signals into the power divider 30, which can distribute the power of the RF signal and feed the distributed RF signal to the antenna stub 20 and the slot 11 respectively. The coupling between the antenna stub 20 and the slot 11 can increase the bandwidth of the antenna and improve its efficiency. The third end of the power divider 30 can be directly connected to the port of the feed structure 70 (RF component) in the existing equipment without affecting its RF architecture. The first end of the power divider 30 can be connected to the feed point of the antenna stub 20, and the second end of the power divider 30 can be connected to the feed point of the slot 11.

[0091] In the antenna structure of this application embodiment, a slot 11 is provided on the ground structure 10, and the antenna stub 20 is coupled to the slot 11. The third end of the power divider 30 can be electrically connected to the feed structure. The radio frequency signal fed into the feed structure can be power-divided by the power divider 30. The radio frequency signal with power divided by the power divider 30 is input to the antenna stub 20 and the slot 11. The radio frequency signal can be distributed to the antenna stub 20 and the slot 11 according to the required power. Through the coupling of the antenna stub 20 and the slot 11, the bandwidth of the antenna structure can be improved, the radiation efficiency of the antenna can be improved, and the performance of the antenna can be enhanced. This antenna structure can be used in different communication devices and systems, is easy to operate and has good adaptability.

[0092] In some embodiments, such as Figures 1 to 3f , Figure 19 As shown, slot 11 can extend circumferentially along ground structure 10, and antenna stub 20 can also extend circumferentially along ground structure 10. Antenna stub 20 can be disposed on the outer periphery of slot 11. The distance between the feed point on antenna stub 20 and the feed point of slot 11 can be adjusted as needed, thereby adjusting the coupling between antenna stub 20 and slot 11. Generally, the coupling strength can be controlled between -3dB and -15dB, and can be expressed using S-parameters and decibel values ​​in dB. For a two-port network, this can correspond to |S... 21 At this point, the antenna device achieves better performance.

[0093] In other embodiments, such as Figures 1 to 3f As shown, the slot 11 can be located at the edge region or corner of the ground structure 10. For example, the ground structure 10 can be rectangular, and the slot 11 can be located at the edge region of one side of the ground structure 10, or at a corner of the ground structure 10, to facilitate the coupling between the antenna stub 20 and the slot 11, thereby facilitating the radiation of radio frequency signals. In application, the antenna stub 20 and the slot 11 can be placed simultaneously at the edge of the ground structure 10. The antenna stub 20 and the slot 11 can be bent along the corner of the ground structure 10 or folded three-dimensionally along the edge of the device to meet the needs of device layout.

[0094] To facilitate the routing of the power divider 30, reduce the distance of the RF transmission line required to connect the feed point, and ensure the coupling strength between the antenna stub 20 and the slot 11, the opening of the slot 11 can be located close to the antenna stub 20. Furthermore, the shape and number of the antenna stub 20 and the slot 11 can be optimized based on the actual equipment structure, component layout, the size and shape of the ground structure 10, and the operating frequency.

[0095] Optionally, such as Figures 1 to 3fAs shown, the slot 11 can be T-shaped, L-shaped, polygonal, circular, elliptical, or elongated. The slot 11 can be located at the edge of the ground structure 10 and can penetrate the edge of the ground structure 10. The edge of the slot 11 can be composed of one or more of straight lines, curves, or bends, and the specific shape can be selected according to the actual situation.

[0096] Optionally, such as Figures 1 to 3f , Figure 19 As shown, the ground structure 10 can be polygonal, circular, or elliptical, and its specific shape and size can be selected according to actual conditions. For example, the ground structure 10 can be rectangular, and the slot 11 can extend along one side edge of the ground structure 10, and the antenna stub 20 can also extend along this edge. Alternatively, the ground structure 10 can be rectangular, and the slot 11 can extend from one side edge of the ground structure 10 to the adjacent side edge, with the slot 11 being approximately L-shaped. The antenna stub 20 can also extend from one side edge of the ground structure 10 to the adjacent side edge, with the antenna stub 20 being approximately L-shaped. Finally, the ground structure 10 can be circular, and the slot 11 can extend circumferentially along the ground structure 10, with the antenna stub 20 extending circumferentially along the ground structure 10. The antenna stub 20 and the slot 11 can be bent or three-dimensionally folded according to the shape of the ground structure 10. The coupling between the slot 11 and the antenna stub 20 can improve the bandwidth and efficiency of the antenna.

[0097] In some embodiments, there may be multiple slots 11, which may be spaced apart and arranged circumferentially along the ground structure 10. For example, there may be two slots 11, which may be located at two corners of the ground structure 10.

[0098] Optionally, there can be multiple antenna stubs 20, which can be spaced apart and arranged circumferentially along the ground structure 10. Each antenna stub 20 can be coupled to a corresponding slot 11 to increase the antenna's radiation performance. Multiple antenna structures with the same operating frequency can be achieved. By increasing the output port at the end of the power divider 30 and utilizing the coupling effect between the multiple antenna stubs 20 and the slot 11, the antenna performance can be further improved.

[0099] In the embodiments of this application, there may be multiple antenna stubs 20, and at least two antenna stubs 20 may have different radiated signal frequencies. The antenna structure may also include a switching switch, through which the antenna stub 20 and the first terminal of the power divider 30 can be electrically connected. The switching switch can conduct any antenna stub 20 to the first terminal of the power divider 30, so that different antenna stubs 20 are connected to the first terminal of the power divider 30, thereby adjusting the radiated signal of the antenna. The antenna structure of this application may have multiple antenna stubs 20 with different operating frequencies. By adding a switching switch, the antenna stubs can be switched, thereby forming different antenna structures with the slots.

[0100] Optionally, there can be multiple antenna stubs 20. The first end of the power divider 30 and each antenna stub 20 can be electrically connected through a phase shifting circuit. For example, there can be three antenna stubs 20. The first end of the power divider 30 and each antenna stub 20 can be electrically connected through a phase shifting circuit. The phase of the radio frequency signal fed into the antenna stub 20 can be adjusted through the phase shifting circuit between the first end of the power divider 30 and the antenna stub 20.

[0101] In some embodiments, such as Figure 4 , Figure 5b , Figure 7a and Figure 7d As shown, the antenna structure may further include: a first phase-shifting circuit 41, the first terminal of which is electrically connected to the antenna stub 20, and the second terminal of which is electrically connected to the first terminal of the power divider 30. The antenna stub 20 and the first terminal of the power divider 30 can be electrically connected via the first phase-shifting circuit 41, which can adjust the phase of the radio frequency (RF) signal fed into the antenna stub 20. The power divider 30 can distribute the RF signal between the antenna stub 20 and the slot 11 according to a specific variation pattern, adjusting and optimizing the amplitude of the RF signal. The first phase-shifting circuit 41 can adjust the phase of the RF signal, thereby improving the overall performance of the antenna.

[0102] In other embodiments, such as Figure 4 , Figure 5b , Figure 7a , Figure 7b and Figure 7d As shown, the antenna structure may further include: a first matching circuit 51, a first terminal of the first phase-shifting circuit 41 connected to one end of the first matching circuit 51, and an antenna stub 20 electrically connected to the other end of the first matching circuit 51. The first matching circuit 51 can electrically connect the first terminal of the first phase-shifting circuit 41 to the antenna stub 20, and can optimize the impedance of the antenna stub 20.

[0103] In some embodiments, such as Figure 4 , Figure 5a , Figure 7a and Figure 7c As shown, the antenna structure may further include a second phase-shifting circuit 42. The first end of the second phase-shifting circuit 42 is disposed adjacent to the slot 11 and can be connected across the slot 11. The second end of the second phase-shifting circuit 42 is electrically connected to the second end of the power divider 30. The second phase-shifting circuit 42 connects the second end of the power divider 30 to the slot 11, and adjusts the phase of the signal fed into the slot 11. The power divider 30 distributes the RF signal between the antenna stub 20 and the slot 11 according to a specific variation pattern, optimizing the amplitude of the RF signal. The second phase-shifting circuit 42 adjusts the phase of the RF signal, improving the overall performance of the antenna. The antenna structure of this application can have multiple antenna stubs with different operating frequencies. By increasing the output port at the end of the power divider 30 and adjusting the amplitude and phase of the corresponding RF signal in real time, the resulting antenna structure has a very large bandwidth.

[0104] In other embodiments, such as Figure 4 , Figure 5a , Figure 7a and Figure 7c As shown, the antenna structure may further include a second matching circuit 52. A first terminal of the second phase-shifting circuit 42 is connected to one end of the second matching circuit 52, and the other end of the second matching circuit 52 is disposed adjacent to the slot 11. For example, the other end of the second matching circuit 52 can be connected across the slot 11, and the slot 11 can be fed through the other end of the second matching circuit 52. The second matching circuit 52 can connect the first terminal of the second phase-shifting circuit 42 to the slot 11, and can optimize the impedance of the slot 11.

[0105] The power divider 30 of the antenna structure can distribute the power of the radio frequency (RF) signal. The first phase-shifting circuit 41 and the second phase-shifting circuit 42 can adjust the phase of the signal fed into the antenna stub 20 and slot 11. The power divider 30 can distribute the input RF signal (amplitude A) to the corresponding output ports according to a specific ratio. The power divider 30, the first phase-shifting circuit 41, and the second phase-shifting circuit 42 can continuously adjust the RF signal according to the operating frequency of the device, thereby enabling the antenna structure to achieve optimal performance. At this time, the amplitude and phase of the RF signal obtained by the antenna stub 20 and slot 11 can be expressed as follows: and For ideal power distribution, the total power of the input signal should be equal to the sum of the total power of each output signal, that is, satisfying (A 2 =A1 2 +A2 2 ).

[0106] like Figure 5a and Figure 5b As shown, the phase of the RF port at one end of the power divider 30 can always be selected as the reference phase zero. In this case, as long as the relative phase difference between the antenna stub 20 and the slot 11 is maintained, the antenna structure can achieve the same performance. In this case, the phase shifting circuit at the reference end can be omitted to simplify the structure.

[0107] Optionally, such as Figure 5a and Figure 7c As shown, the antenna structure may further include a third matching circuit 53, one end of which is electrically connected to the first end of the power divider 30, and the other end of which is electrically connected to the antenna stub 20. The third matching circuit 53 allows the first end of the power divider 30 to be electrically connected to the antenna stub 20, and optimizes the impedance of the antenna stub 20.

[0108] Optionally, such as Figure 5b and Figure 7d As shown, the antenna structure may further include a fourth matching circuit 54. One end of the fourth matching circuit 54 is electrically connected to the second end of the power divider 30, and the other end of the fourth matching circuit 54 is disposed adjacent to the slot 11. The other end of the fourth matching circuit 54 can be connected across the slot 11 and can supply power to the slot 11. The fourth matching circuit 54 can connect the second end of the power divider 30 to the slot 11 to supply power to the slot 11, and can optimize the impedance of the slot 11.

[0109] Optionally, such as Figures 4 to 7d As shown, the antenna structure may further include: a fifth matching circuit 55, with the third terminal of the power divider 30 electrically connected to one end of the fifth matching circuit 55, and the other end of the fifth matching circuit 55 electrically connected to the feed structure 70. The fifth matching circuit 55 allows the third terminal of the power divider 30 to be electrically connected to the feed structure 70, enabling the RF signal from the feed structure 70 to be fed to the power divider 30 via the fifth matching circuit 55. The fifth matching circuit 55 optimizes the impedance. The power divider 30 distributes the power of the RF signal, allocating it to the antenna stub 20 and slot 11 as needed. The coupling between the antenna stub 20 and slot 11 improves the bandwidth of the antenna structure, enhances the antenna's radiation efficiency, and strengthens its performance.

[0110] The RF input and output terminals of the power divider 30 can be connected to a matching network as needed, which can improve the input impedance of the antenna stub 20 and slot 11, meet the impedance matching requirements of the RF components (feed structure) in the equipment for the load devices, and avoid energy reflection of the equipment's RF link due to mismatch, which would affect the efficiency of the equipment.

[0111] Optionally, such as Figure 6 and Figure 7b As shown, the antenna structure may further include: a chip 60, which may have a first phase-shifting circuit 41 and a second phase-shifting circuit 42. The first end of the first phase-shifting circuit 41 is electrically connected to the antenna stub 20, and the second end of the first phase-shifting circuit 41 is electrically connected to the first end of the power divider 30. The first end of the second phase-shifting circuit 42 is disposed adjacent to the slot 11 and can be connected across the slot 11. The second end of the second phase-shifting circuit 42 is electrically connected to the second end of the power divider 30. The antenna stub 20 and the first end of the power divider 30 can be electrically connected via the first phase-shifting circuit 41, which allows adjustment of the phase of the radio frequency signal fed into the antenna stub 20. The second end of the power divider 30 can be connected to the slot 11 via the second phase-shifting circuit 42, which allows adjustment of the phase of the signal fed into the slot 11. The power divider 30 can distribute the power of the radio frequency signal between the antenna stub 20 and the slot 11 according to a specific variation law, adjust and optimize the amplitude of the radio frequency signal, and adjust the phase of the radio frequency signal through the phase shifting circuit, thereby improving the overall performance of the antenna.

[0112] Optionally, the power divider 30 can be integrated onto the chip 60, and the matching circuit can also be integrated onto the chip 60, resulting in high integration. The chip 60 can be a power phase distribution chip, which integrates the functions of the power divider 30 and the phase shifting circuit, simplifying the structure and improving the reliability and integration of the structure while achieving continuous adjustment of the amplitude and phase of the RF signal.

[0113] Optionally, the antenna structure can operate at frequencies of 700MHz-960MHz or 1710MHz-1880MHz, which can effectively improve the efficiency of low-frequency signal antennas.

[0114] like Figure 8 As shown, through Figure 8 The antenna is fed at the feed point location on antenna stub 20. This antenna structure can be used for LTE low-frequency band communication in mobile terminals, and is only used to demonstrate its performance when radiating as an independent antenna structure. Therefore, the corresponding slots are removed to avoid mutual interference between structures. Figure 9 The S-parameter results shown indicate that when the operating frequency is around 0.81 GHz, the antenna structure exhibits a relatively deep standing wave (|S0|S0).11 |lower), at which point the impedance matching efficiency (η) mat (Higher)

[0115] like Figure 10 As shown, through Figure 10 The slot is fed at its feed point, which can be seen near the edge of the ground structure, with the feed point located at the opening. This slot is only used to demonstrate its performance as a standalone antenna structure; therefore, corresponding antenna stubs have been removed to avoid interference between structures. When the slot radiates as a standalone antenna structure, its S-parameters can be obtained as follows: Figure 11 As shown, Figure 11 As shown, the VSWR of the slot itself is very shallow in the LTE low-frequency band (|S 11 |Higher), at which point its impedance matching efficiency (η) is higher. mat The efficiency of antenna structures is very low, which directly affects their effectiveness.

[0116] like Figure 12 As shown, the feed point locations in the antenna structure of this embodiment are as follows: the feed point of the antenna stub corresponds to feed point 1, and the feed point of the slot corresponds to feed point 2. The first end of the power divider 30 feeds the antenna stub 20 through feed point 1, and the second end of the power divider 30 feeds the slot 11 through feed point 2. Due to the coupling effect between the two feed points, the antenna stub 20 and the slot 11 influence each other and together form the antenna device.

[0117] The S-parameters of the antenna structure in the embodiments of this application can be as follows: Figure 13 As shown, compared to when it is used alone as an antenna structure, the standing wave ratio of the antenna stub is shallower (|S 11 |S increases), and at the same time, the standing wave in the slot is significantly deepened (|S). 22 |lower). The two feed points of the antenna stub and slot now have a strong coupling strength (|S). 21 |), which is approximately -5.5dB at 0.83GHz.

[0118] The amplitude variation curve of the radio frequency signal corresponding to the antenna structure in this embodiment can be shown as follows: Figure 14 As shown, the solid line represents the RF signal allocated to the antenna stub (feed point 1), and the dashed line represents the RF signal allocated to the slot (feed point 2). It can be seen that at different operating frequencies, the two RF ports correspond to different amplitudes, and the square of the RF signal amplitude is equal to its power distribution ratio. For example, when the power is equally distributed, the amplitude corresponding to the RF signal is 0.7071, i.e.

[0119] The phase change curve of the radio frequency signal corresponding to the antenna structure in this embodiment can be shown as follows: Figure 15 As shown, the solid line represents the RF signal allocated to the antenna stub (feed point 1), and the dashed line represents the RF signal allocated to the slot (feed point 2). In this example, the RF signal of the slot is selected as the reference phase, i.e., the zero phase. It can be seen that the phase of the RF signal of the antenna stub varies between 150° and 180° at different operating frequencies.

[0120] The efficiency (η) of the antenna structure in this embodiment can be as follows: Figure 16 As shown, the solid lines represent the antenna stubs and slots that can be arranged as follows: Figure 1 The antenna structures shown participate in radiation, and the radio frequency signal can be emitted in the operating frequency band according to the following... Figure 14 and Figure 15 The amplitude and phase shown are assigned to the antenna stubs and slots, respectively. The dashed lines, serving as a comparative reference for antenna structural performance, represent... Figure 8 and Figure 10 The efficiency of the antenna stubs and slots shown is demonstrated when they radiate as independent antenna structures. The comparison shows that the antenna structure according to this application has better bandwidth and efficiency than the antenna stubs or slots operating as independent antenna structures. In particular, this application significantly improves both the bandwidth and efficiency of the antenna structure.

[0121] The amplitude and phase of the radio frequency signal corresponding to the antenna structure in this embodiment can be set to fixed values ​​within the operating frequency of the antenna structure. In this case, the power divider 30, the first phase shifting circuit 41, and the second phase shifting circuit 42 can all be simplified to fixed-mode devices, that is, the power divider 30 distributes the radio frequency signal to the antenna stubs and slots according to a fixed ratio, and the first phase shifting circuit 41 and the second phase shifting circuit 42 generate a fixed phase difference. In addition, the phase of one of the radio frequency ports can always be selected as the reference phase zero point to further simplify the structure. The connection method of the antenna structure included in this application can be as follows: Figure 17a and Figure 17b As shown.

[0122] The efficiency (η) of the antenna structure in this embodiment when using fixed power distribution within its operating frequency can be as follows: Figure 18 As shown. At this time, the amplitude of the radio frequency signal allocated to the antenna stub is fixed at 0.8153, and its phase is fixed at 164°. The amplitude of the radio frequency signal allocated to the slot is fixed at 0.5791, and since it is selected as the reference phase null point, its radio frequency signal phase is fixed at 0°. The solid line represents the phase of the antenna stub and slot as shown in the diagram. Figure 1The antenna structures shown all participate in radiation, and the radio frequency signal is distributed to the antenna stubs and slots respectively with fixed amplitude and phase within the operating frequency band. The dashed lines represent, as a comparative reference for antenna structure performance, the antenna stubs and slots respectively. Figure 8 and Figure 10 The efficiency of the antenna stubs and slots shown is demonstrated when they radiate as independent antenna structures. The efficiency (η) of the antenna structure in this embodiment, when using fixed-weight power allocation within its operating frequency, is optimized to still outperform the bandwidth and efficiency of the antenna stubs or slots participating in radiation when operating as independent antenna structures.

[0123] This application provides an electronic device including the antenna structure described in the above embodiments. The electronic device having the antenna structure described in the above embodiments has a large antenna bandwidth, high efficiency, and good performance.

[0124] Optionally, the electronic device may further include a frame, which serves as the ground structure 10. The frame may be made of a conductive material, such as a metal component.

[0125] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An antenna structure, characterized by Comprising: a ground structure, a slot being provided on the ground structure; an antenna branch connected with the ground structure, the antenna branch being coupled with the slot; a power divider, a first end of the power divider being electrically connected with the antenna branch, a second end of the power divider being used for feeding the slot, a third end of the power divider being electrically connected with a feeding structure; the slot extends along a circumferential direction of the ground structure, the antenna branch extends along the circumferential direction of the ground structure, the antenna branch is arranged outside the slot.

2. The antenna structure of claim 1, wherein the slot is arranged at an edge region or a corner of the ground structure.

3. The antenna structure of claim 1, wherein, the slot is T-shaped, L-shaped, polygonal, circular, elliptical or long strip-shaped; and / or the ground structure is polygonal, circular or elliptical.

4. The antenna structure of claim 1, wherein, the slot has a plurality of slots, the plurality of slots are arranged at intervals; and / or the antenna branch has a plurality of antenna branches, the plurality of antenna branches are arranged at intervals.

5. The antenna structure of claim 1, wherein, the antenna branch has a plurality of antenna branches, at least two of the antenna branches have different radiation signal frequencies, further comprising: a switch, the antenna branch and the first end of the power divider are electrically connected through the switch, the switch can be turned on to connect any of the antenna branches with the first end of the power divider.

6. The antenna structure of claim 1, wherein, the antenna branch has a plurality of antenna branches, and each of the antenna branches is respectively electrically connected with the first end of the power divider through a phase shift circuit.

7. The antenna structure of claim 1, wherein, Further comprising: a first phase shift circuit, a first end of the first phase shift circuit being electrically connected with the antenna branch, a second end of the first phase shift circuit being electrically connected with the first end of the power divider.

8. The antenna structure of claim 7, wherein, Further comprising: a first matching circuit, a first end of the first phase shift circuit being connected with one end of the first matching circuit, the antenna branch being electrically connected with the other end of the first matching circuit.

9. The antenna structure of claim 1 or 7, wherein, Further comprising: a second phase shift circuit, a first end of the second phase shift circuit being arranged adjacent to the slot, a second end of the second phase shift circuit being electrically connected with the second end of the power divider.

10. The antenna structure of claim 9, wherein, Further comprising: a second matching circuit, a first end of the second phase shift circuit being connected with one end of the second matching circuit, the other end of the second matching circuit being arranged adjacent to the slot.

11. The antenna structure of claim 1, wherein Further comprising: a third matching circuit, one end of the third matching circuit being electrically connected with the first end of the power divider, the other end of the third matching circuit being electrically connected with the antenna branch; and / or a fourth matching circuit, one end of the fourth matching circuit being electrically connected with the second end of the power divider, the other end of the fourth matching circuit being used for feeding the slot.

12. The antenna structure of claim 1, wherein, Further comprising: a fifth matching circuit, the third end of the power divider being electrically connected with one end of the fifth matching circuit, the other end of the fifth matching circuit being used for electrically connecting with the feeding structure.

13. The antenna structure of claim 1, wherein, Further comprising: a chip, the chip having a first phase shift circuit and a second phase shift circuit, a first end of the first phase shift circuit being electrically connected with the antenna branch, a second end of the first phase shift circuit being electrically connected with the first end of the power divider; a first end of the second phase shift circuit being arranged adjacent to the slot, a second end of the second phase shift circuit being electrically connected with the second end of the power divider.

14. The antenna structure of claim 13, wherein, the power divider is integrated on the chip.

15. The antenna structure of claim 1, wherein, The operating frequency of the antenna structure is 700MHz-960MHz or 1710MHz-1880MHz.

16. An electronic device, comprising: The electronic device comprises the antenna structure according to any one of claims 1-15.

17. The electronic device of claim 16, wherein, The electronic device further comprises: A frame body serving as the ground structure.

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