Antenna device and electronic device
By employing parallel radiators and slot/groove designs in electronic devices, combined with feed excitation, the problem of the narrow applicability of traditional circularly polarized antennas in electronic devices has been solved, enabling circularly polarized radiation on devices of various shapes and improving the efficiency and purity of GPS communication.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD
- Filing Date
- 2023-12-29
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional circularly polarized antennas are difficult to apply to electronic devices such as disc-shaped smartwatches, limiting their applicability.
By employing a first, second, and third radiator arranged in parallel, combined with a slot and groove design, equivalent current and magnetic current are generated through feed excitation, achieving a 90-degree phase difference and supporting circularly polarized radiation.
It enables the flexible application of circular polarization radiation on electronic devices of various shapes, improving the performance of circular polarization, especially the radiation efficiency and purity in the GPS communication frequency band.
Smart Images
Figure CN117748123B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of radio frequency technology, and in particular to an antenna device and electronic device. Background Technology
[0002] Circularly polarized antennas have good gain, but traditional technologies often use a set of vertical currents to achieve circular polarization. However, the applicant found that this design is difficult to apply to electronic devices such as disc-shaped smartwatches, and its applicability is narrow. Summary of the Invention
[0003] Therefore, it is necessary to provide an antenna device and an electronic device.
[0004] In a first aspect, an antenna device is provided, comprising:
[0005] Metal flooring;
[0006] A first radiator, having a first feed point and a first grounding point connected to the metal floor;
[0007] A second radiator, the second radiator having a second feed point;
[0008] The third radiator has a second grounding point connected to the metal floor; both the third radiator and the second radiator are connected to the metal floor and are parallel to the first radiator; there is a gap between the third radiator and the second radiator; and the metal floor has a groove communicating with the gap on the side away from the gap.
[0009] The feed source is connected to the first feed point and the second feed point respectively. The feed source is used to excite an equivalent current to form on the first radiator to support the first frequency band, and to excite the second radiator and the third radiator to jointly support the first frequency band, so as to excite the groove to radiate an equivalent magnetic current. The equivalent magnetic current is parallel to the equivalent current and has a phase difference of 90 degrees.
[0010] In a second aspect, an electronic device is provided, including the antenna device described above; the metal floor is at least a portion of the middle plate or circuit board in the electronic device.
[0011] In the aforementioned antenna device and electronic equipment, the first radiator is coupled to a metal ground plane. The excitation current provided by the feed source is transmitted on the first radiator, forming an equivalent current to support the first frequency band. The second and third radiators are parallel to the first radiator and are both connected to the metal ground plane, forming a groove between them. The feed current provided by the feed source is transmitted around the groove, forming a current distribution parallel to the equivalent current on the first radiator, thereby exciting the groove to radiate an equivalent magnetic current. Due to the gap between the second and third radiators, the second grounding point on the third radiator and the first grounding point on the first radiator are both connected to the metal ground plane. With the gap size design, a 90-degree phase difference is formed between the equivalent current and the equivalent magnetic current to support circularly polarized radiation in the first frequency band. This antenna device, based on the parallel design of the radiators, eliminates the need to find two vertical frames to achieve circular polarization, which is beneficial for achieving circularly polarized radiation on electronic equipment of various shapes. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is one of the structural schematic diagrams of an antenna device according to an embodiment;
[0014] Figure 2 This is a second schematic diagram of the antenna device according to one embodiment;
[0015] Figure 3a for Figure 1 Under the structure, the large arrow points to the direction of the electric field at 0 degrees phase;
[0016] Figure 3b for Figure 1 Under the structure, the large arrow points to the direction of the electric field at a 90-degree phase.
[0017] Figure 3c for Figure 1 Under the structure, the large arrow points to the direction of the electric field at a 180-degree phase.
[0018] Figure 3d for Figure 1 Under the structure, the large arrow points to the direction of the electric field at a phase of 270 degrees;
[0019] Figure 4 for Figure 1 A schematic diagram showing the S-parameters and efficiency test results of the antenna device under the given structure;
[0020] Figure 5 for Figure 1 The axial ratio curve of the antenna device under the given structure;
[0021] Figure 6 for Figure 5 The corresponding axial ratio 3D diagram;
[0022] Figure 7a for Figure 1 Under this structure, the total field radiation distribution of the antenna device is shown in the diagram.
[0023] Figure 7b for Figure 1 Under this structure, the right-hand circularly polarized radiation field distribution of the antenna device is shown.
[0024] Figure 7c for Figure 1 Under this structure, the distribution of the left-hand circularly polarized radiation field of the antenna device is shown.
[0025] Figure 8 for Figure 1 A schematic diagram showing the coordinate relationship between the circular polarization direction and the equivalent current and equivalent magnetic current under the structure;
[0026] Figure 9 for Figure 1 Comparison of gains between right-hand circular polarization and left-hand circular polarization under the given structure;
[0027] Figure 10 This is the third schematic diagram of the antenna device according to one embodiment;
[0028] Figure 11a This is one of the structural schematic diagrams of the tuning units in the antenna device in one embodiment;
[0029] Figure 11b This is a second schematic diagram of the structure of each tuning unit in the antenna device in one embodiment;
[0030] Figure 11c This is the third schematic diagram of the structure of each tuning unit in the antenna device in one embodiment;
[0031] Figure 11d This is the fourth schematic diagram of the structure of each tuning unit in the antenna device in one embodiment;
[0032] Figure 11e This is the fifth schematic diagram of the structure of each tuning unit in the antenna device in one embodiment;
[0033] Figure 11f This is a schematic diagram of the structure of each tuning unit in the antenna device in one embodiment;
[0034] Figure 11gThis is the seventh schematic diagram of the structure of each tuning unit in the antenna device in one embodiment;
[0035] Figure 11h This is the eighth schematic diagram of the structure of each tuning unit in the antenna device in one embodiment;
[0036] Figure 12 This is one of the schematic diagrams of an electronic device structure according to an embodiment;
[0037] Figure 13 This is a second schematic diagram of an electronic device structure according to an embodiment. Detailed Implementation
[0038] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.
[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.
[0040] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first radiator may be referred to as a second radiator, and similarly, a second radiator may be referred to as a first radiator. Both the first radiator and the second radiator are radiators, but they are not the same radiator.
[0041] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.
[0042] The antenna device provided in this application embodiment can be applied to electronic devices. These electronic devices can be handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., mobile phones), mobile stations (MS), etc. For ease of description, the devices mentioned above are collectively referred to as electronic devices.
[0043] In one embodiment, such as Figure 1As shown, an antenna device is provided, including: a metal ground plane 10, a first radiator 20, a second radiator 30, a third radiator 40, and a feed source S. The feed source S is a device capable of generating an excitation signal.
[0044] The first radiator 20 has a first power supply point and a first grounding point connected to the metal floor 10. The second radiator 30 has a second power supply point. The third radiator 40 has a second grounding point connected to the metal floor 10. Both the third radiator 40 and the second radiator 30 are connected to the metal floor 10 and are parallel to the first radiator 20. There is a gap between the third radiator 40 and the second radiator 30. The metal floor 10 has a groove communicating with the gap on the side away from the gap.
[0045] The feed source S is connected to the first feed point and the second feed point respectively. The feed source S is used to excite the first radiator 20 to form an equivalent current to support the first frequency band, and to excite the second radiator 30 and the third radiator 40 to jointly support the first frequency band, so as to excite the groove to radiate an equivalent magnetic current. The equivalent magnetic current is parallel to the equivalent current and has a phase difference of 90 degrees.
[0046] Specifically, the feed signal provided by the feed source S is fed into the first radiator 20 from the first feed point. When transmitted on the first radiator 20, it can transmit radio frequency signals in the first frequency band. At the same time, the feed signal provided by the feed source S is fed into the second radiator 30 from the second feed point. It is transmitted on the second radiator 30 and, based on slot coupling, continues to be transmitted on the third radiator 40. In addition, based on the connection relationship between the second radiator 30 and the third radiator 40 and the metal ground 10, and the design of the second radiator 30 and the third radiator 40 being parallel to the first radiator 20, a current distribution parallel to the equivalent current on the first radiator 20 can be formed around the groove. Based on the duality principle, the direction of the electric field generated by the current element corresponds to the magnetic field of the magnetic current element, and the magnetic field of the magnetic current element corresponds to the electric field of the magnetic current element. Since the electric field and magnetic field are orthogonal in space, the electric field generated by the equivalent magnetic current radiated from the groove and the electric field generated by the equivalent current on the first radiator 20 are also orthogonal, thereby supporting circularly polarized radiation in the first frequency band. Compared to the traditional method of using a set of vertically orthogonal currents to achieve circular polarization radiation, the antenna device provided in this application embodiment, based on the parallel arrangement of the first radiator 20, the second radiator 30 and the third radiator 40, combined with the slot and groove design, can be flexibly applied to electronic devices of various shapes and structures, which is beneficial for realizing the circular polarization design of antennas in electronic devices of various shapes such as smartwatches.
[0047] Optionally, the first radiator 20, the second radiator 30, and the third radiator 40 may be one of the following: a flexible printed circuit (FPC) antenna radiator, a laser direct structural (LDS) antenna radiator, a printed direct structural (PDS) antenna radiator, and a metal radiating branch. In this embodiment, the radiator type of the first radiator 20, the second radiator 30, and the third radiator 40 is not further limited, and the types of the first radiator 20, the second radiator 30, and the third radiator 40 may be the same or different.
[0048] The second radiator 30 and the third radiator 40 can also be integrally formed with the metal floor 10. For example, the second radiator 30 and the third radiator 40 can also be obtained by slotting and slitting on a whole piece of metal floor 10.
[0049] In one embodiment, such as Figure 1 As shown, the second feed point is located at one end of the second radiator 30 coupled to the third radiator 40, and the second ground point is located at one end of the third radiator 40 coupled to the second radiator 30. In this case, when the feed source S excites the second radiator 30 and the third radiator 40 to transmit feed signals, the communication quality is high. Furthermore, due to the equivalent capacitance of the gap, a phase difference is formed between the second feed point and the second ground point. The phase of the second feed point leads the phase of the second ground point. By designing the gap size, the phase difference between the equivalent magnetic current radiated from the groove and the equivalent current on the first radiator 20 can be ensured to be 90 degrees, thus achieving a circularly polarized antenna design. Optionally, the second ground point can be located at other positions on the third radiator 40, but the closer the second ground point is to the coupling end of the third radiator 40, the better.
[0050] In one embodiment, such as Figure 1 and Figure 2 As shown, the first grounding point is connected to a point on the metal floor 10 near the second radiator 30. At this time, the first radiator 20 forms an equivalent current distribution (e.g., ...) that propagates from its end to the first grounding point. Figure 2 The current J in the groove generates a current distribution that is opposite to the equivalent current (e.g., the current J in the groove), while a current distribution opposite to the equivalent current is generated around the groove (e.g., the current J in the groove). Figure 2 As shown by the current I in the figure, at this time, the equivalent current of the first radiator 20 and the equivalent magnetic current radiated by the groove are as follows: Figure 1 As shown in the diagram, the equivalent magnetic current and the equivalent current are parallel and in the same direction. Furthermore, the slot width design allows for a 90-degree phase difference between them. At this point, the electric field phase distribution of the entire antenna device is as follows: Figures 3a-3dAs shown in the diagram, the electric field points to the right, down, left, and up respectively at the four phases indicated by the large arrows at 0 degrees, 90 degrees, 180 degrees, and 270 degrees. Figures 3a-3d From a visual perspective, the electric field rotates clockwise, indicating that a right-hand circularly polarized wave is excited. The first frequency band may include the GPS (Global Positioning System) communication band, and the right-hand circularly polarized antenna design can transmit GPS signals well.
[0051] The gap between the second radiator 30 and the third radiator 40 forms an equivalent capacitance. Based on the inter-plate capacitance formula, it is known that the narrower the gap width, the larger the equivalent capacitance and the less the phase lead; conversely, the wider the gap width, the smaller the equivalent capacitance and the greater the phase lead. Therefore, a 90-degree phase difference between the equivalent current and the equivalent magnetic current can be achieved by designing the gap width.
[0052] Taking the first frequency band, which includes the GPS communication frequency band, as an example, in Figure 1 Under the structure shown, the S-parameters (S1,1) and efficiency curves (total efficiency curve E) of the antenna device are... T Radiative efficiency curve E R )like Figure 4 As shown in the figure, it can be seen that it supports the 1.575GHz resonant frequency band and has high radiation efficiency in the GPS communication frequency band, thus achieving high-quality GPS communication.
[0053] Axial ratio is an important performance indicator of circularly polarized antennas. It represents the purity of circular polarization. The bandwidth with an axial ratio not exceeding 3 dB is defined as the circular polarization bandwidth of the antenna. It is an important indicator for measuring the difference in signal gain of an antenna device in different directions. From... Figure 5 The axial ratio curve shown, and as Figure 6 As shown in the 3D diagram of the axial ratio, the antenna device provided in this application embodiment has an extremely low axial ratio (AR) within the GPS communication frequency band, indicating good circular polarization purity within the GPS communication bandwidth.
[0054] When the first frequency band includes the GPS communication frequency band, Figure 1 Under this structure, the total field distribution of the antenna device when radiating radio frequency signals is as follows: Figure 7a As shown, the right-hand circularly polarized radiation field distribution is as follows: Figure 7b As shown, the distribution of the left-hand circularly polarized radiation field is as follows: Figure 7c As shown in the figure, the main radiation direction of right-hand circular polarization is consistent with the main radiation direction of the total field. Therefore, right-hand circular polarization is the dominant polarization, which can meet the requirements of GPS communication. Furthermore, both the total field and the right-hand circular polarization component radiate upwards, improving the circular polarization performance. Figure 8As shown, the circular polarization direction k points perpendicular to the equivalent current (I1) and the equivalent magnetic current (M1, corresponding to current I2).
[0055] Left-handed polarization is cross-polarization. In the desired direction of the principal polarization, the larger the difference between the cross-polarization and the principal polarization, the better. Figure 9 The gain comparison diagram of right-hand circular polarization and left-hand circular polarization shown shows that the difference between the main polarization and the cross polarization reaches more than 30dB (the gain difference between the right-hand circular polarization superscript point 1 and the left-hand circular polarization superscript point 2).
[0056] The antenna device provided in this application embodiment constructs a set of parallel current and magnetic current radiation through the first radiator 20 and the groove below it, thereby achieving good circular polarization performance.
[0057] In one embodiment, the first grounding point can be connected to a point on the metal floor 10 near the third radiator 40, which can excite a left-hand circularly polarized wave, applicable to scenarios requiring left-hand circularly polarized communication.
[0058] In one embodiment, the antenna device further includes a tuning circuit 50.
[0059] The tuning circuit 50 is connected to the feed source S and the first and second feed points, respectively. The tuning circuit 50 is used to adjust the first radiator 20 to support the first frequency band, and to adjust the second radiator 30 and the third radiator 40 to jointly support the first frequency band. Through tuning by the tuning circuit 50, the first radiator 20, the second radiator 30, and the third radiator 40 can support circularly polarized radiation in the first frequency band.
[0060] The first feed signal (the feed signal corresponding to the first frequency band) provided by the feed source S is tuned by the tuning circuit 50 and fed into the first radiator 20 from the first feed point. It is transmitted on the first radiator 20 and grounded based on the first ground point. When the first feed signal is transmitted on the first radiator 20, it can support the transmission of radio frequency signals in the first frequency band.
[0061] Optionally, the feed source S can excite the first radiator 20 to operate in a 1 / 4 wavelength resonant mode.
[0062] The size of the first radiator 20 is matched with the wavelength corresponding to the first frequency band. Taking the first frequency band f1 as the center frequency of GPS-L5 in the GPS communication band of 1.176GHz as an example, the wavelength corresponding to the first frequency band f1 is λ1=c / f1=25.5cm. At this time, the electrical length of the first radiator 20 should be matched with λ1 / 4=6.4cm, for example, it can be 6.4cm, to support the λ1 / 4 resonant mode.
[0063] Optionally, the tuning circuit 50 may include at least one or a combination of capacitors, resistors, and inductors. In this embodiment, no further limitations are made on the type of frequency modulation devices included in the tuning circuit 50 or the connection relationships between the devices.
[0064] The tuning circuit 50 includes a capacitor, with one end grounded (the grounded position in the tuning circuit 50) and the other end connected to the second feed point. Under the action of this capacitor, the phase of the second feed point leads the phase of the second grounded point. If the tuning circuit 50 includes an inductor, with one end grounded and the other end connected to the second feed point, under the action of this inductor, the phase of the second feed point lags the phase of the second grounded point. Therefore, by adjusting the matching parameters and structure of the tuning circuit 50, the phase difference between the equivalent current and the equivalent magnetic current can be controlled, ensuring that the phase difference between them is 90 degrees, thus satisfying the circular polarization condition.
[0065] As described in the above embodiments, the phase difference can also be adjusted based on both the gap width adjustment and the structure and structural parameters in the tuning circuit 50.
[0066] In one embodiment, the first end of the first radiator 20 is a free end, the second end of the first radiator 20 is provided with a first ground point, and a first feed point is provided between the first end and the second end of the first radiator 20. The first radiator 20 forms an IFA antenna, supporting feed from the ground point to the end, to form an antenna such as... Figure 1 The current distribution shown indicates that the first radiator 20 can support a 1 / 4 wavelength resonant mode.
[0067] In one embodiment, both the first end and the second end of the first radiator 20 are free ends, and a first grounding point and a first feed point are provided between the first end and the second end of the first radiator 20. The first radiator 20 forms a T-shaped antenna, such as... Figure 10 In the middle, the radiator from the first grounding point to its left free end can support other frequency bands and realize bandwidth expansion.
[0068] In one embodiment, when the tuning circuit 50 is included, the first grounding point is located closer to the first end than the first feed point, and the distance between the first grounding point and the first end is less than the distance between the first grounding point and the second end. The tuning circuit 50 is used to support the first radiator 20 to operate in a first resonant mode to transmit signals in a first frequency band, and to support the first radiator 20 to operate in a second resonant mode to transmit signals in a second frequency band. The frequency ranges of the first frequency band and the second frequency band are different. The current distribution corresponding to the first resonant mode is from the second end to the first grounding point, and the current distribution corresponding to the second resonant mode is from the first end to the first grounding point.
[0069] Based on the tuning matching of the tuning circuit 50, the two resonant modes described above can be supported to support the first and second frequency bands. The frequency of the second frequency band can be higher than that of the first frequency band without affecting the circularly polarized wave radiation of the first frequency band.
[0070] The tuning circuit 50 in various embodiments of this application may include a selection switch and at least one tuning unit with different tuning parameters. The selection switch selects any one of the tuning units, causing the tuning circuit 50 to operate in different resonant frequency bands. For example... Figures 11a-11h The diagram shows circuit architecture schematics of tuning units with different tuning parameters in some embodiments of this application. It should be understood that... Figures 11a-11h The two leads for each tuning unit are provided in the diagram and are used to connect to external circuits.
[0071] In one embodiment, such as Figure 11a As shown, the tuning unit may include an inductor L1 and a capacitor C1 connected in series.
[0072] In one embodiment, such as Figure 11b As shown, the tuning unit may include an inductor L1 and a capacitor C1 connected in parallel.
[0073] In one embodiment, such as Figure 11c As shown, the tuning unit may include an inductor L1, a capacitor C1, and a capacitor C2. The inductor L1 and capacitor C1 are connected in parallel, and then connected in series with capacitor C2.
[0074] In one embodiment, such as Figure 11d As shown, the tuning unit may include inductor L1, capacitor C1, capacitor C2, and inductor L2. Inductor L1 and capacitor C1 are connected in parallel and then connected in series with inductor L2.
[0075] In one embodiment, such as Figure 11e As shown, the tuning unit may include an inductor L1, a capacitor C1, and a capacitor C2. The inductor L1 and the capacitor C1 are connected in series, and then connected in parallel with the capacitor C2.
[0076] In one embodiment, such as Figure 11f As shown, the tuning unit may include inductor L1, capacitor C1, and inductor L2. Inductor L1 and capacitor C1 are connected in series and then connected in parallel to inductor L2.
[0077] In one embodiment, such as Figure 11g As shown, the tuning unit may include inductor L1, capacitor C1, capacitor C2, and inductor L2. Inductor L1 and capacitor C1 are connected in parallel to form the first branch, and inductor L2 and capacitor C2 are connected in parallel to form the second branch. The first branch and the second branch are connected in series.
[0078] In one embodiment, such as Figure 11hAs shown, the tuning unit may include inductor L1, capacitor C1, capacitor C2, and inductor L2. Inductor L1 and capacitor C1 are connected in series to form a third branch, and inductor L2 and capacitor C2 are connected in series to form a fourth branch. The third and fourth branches are connected in parallel.
[0079] Optionally, the tuning circuit 50 may include multiple tuning units (including but not limited to the tuning units described in the above embodiments) and a first gating switch. Each tuning unit has different tuning parameters, and the gating switch is connected to the feed S and each tuning unit, respectively. For example, the gating switch includes a first terminal and multiple second terminals. The first terminal of the gating switch is connected to a first feed point and a second feed point. The multiple second terminals of the gating switch are connected one-to-one to the first terminals of each tuning unit, and the second terminals of the tuning units are connected to the feed S. The gating switch can selectively conduct the feed S and any tuning unit, so that the tuning circuit 50 operates in different resonant frequency bands. It should be noted that the specific distribution and size of the gating switch and tuning units can be determined according to the design requirements when the antenna device is actually applied to electronic equipment.
[0080] In one embodiment, an electronic device is provided, including the aforementioned antenna device; the metal ground plane is at least a portion of the middle plate or circuit board in the electronic device. The electronic device equipped with the aforementioned antenna device can not only achieve circularly polarized radiation in a first frequency band, but the antenna device can also be flexibly positioned at multiple locations within the electronic device, such as multiple frame locations, as long as parallel equivalent current and equivalent magnetic current can be formed. For example, a first radiator can be formed on the outer frame of a circular smartwatch, and a second and third radiator can be formed on the middle plate.
[0081] In one embodiment, such as Figure 12 As shown, the electronic device 100 also includes a mid-frame. The mid-frame includes a mid-plate 110 and a plurality of frame borders 120 surrounding the sides of the mid-plate 110; wherein a first radiator 20 is disposed on one or more frame borders 120. The first radiator 20 may be formed on one or more frame borders 120 to support a first frequency band.
[0082] In one embodiment, such as Figure 12 As shown, the frame 120 includes a top frame 121, a first side frame 122, a bottom frame 123, and a second side frame 124 connected end to end. When the first frequency band includes the GPS communication frequency band, the first radiator 20 is disposed on the top frame 121. Distributing the GPS antenna on the top frame 121 can improve the communication quality of the electronic device 100 in the GPS communication frequency band. For example, when the electronic device 100 is held vertically, such as... Figure 1 The antenna device shown is constructed with the equivalent current and equivalent magnetic current parallel to the horizontal plane, so that the total field and right-hand component are upward, thereby improving the communication quality of the GPS communication band.
[0083] like Figure 13 As shown, further, taking mobile phone 101 as an example of electronic device 100, the specific details are as follows: Figure 13 As shown, the mobile phone 101 may include a memory 21 (which optionally includes one or more computer-readable storage media), processing circuitry 22, a peripheral device interface 23, a radio frequency system 24, and an input / output (I / O) subsystem 26. These components optionally communicate via one or more communication buses or signal lines 29. Those skilled in the art will understand that... Figure 13 The mobile phone 101 shown does not constitute a limitation on the mobile phone and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Figure 13 The various components shown are implemented in hardware, software, or a combination of both, including one or more signal processing and / or application-specific integrated circuits.
[0084] Memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Exemplary examples include software components stored in memory 21 such as an operating system 211, a communication module (or instruction set) 212, a global positioning system (GPS) module (or instruction set) 213, etc.
[0085] Processing circuitry 22 and other control circuitry (such as the control circuitry in radio frequency system 24) can be used to control the operation of mobile phone 101. Processing circuitry 22 may include one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application-specific integrated circuits, etc.
[0086] The processing circuit 22 can be configured to implement a control algorithm for controlling the use of the antenna in the mobile phone 101. The processing circuit 22 can also issue control commands for controlling various switches and tuning circuits in the radio frequency system 24.
[0087] I / O subsystem 26 couples input / output peripherals on mobile phone 101, such as a keypad and other input control devices, to peripheral interface 23. I / O subsystem 26 optionally includes a touchscreen, buttons, a tone generator, an accelerometer (motion sensor), an ambient light sensor and other sensors, light-emitting diodes and other status indicators, data ports, etc. For example, a user can control the operation of mobile phone 101 by supplying commands via I / O subsystem 26, and can use the output resources of I / O subsystem 26 to receive status information and other outputs from mobile phone 101. For example, a user can press button 261 to turn the phone on or off.
[0088] The radio frequency system 24 may include the antenna device in any of the foregoing embodiments.
[0089] Optionally, the communication control unit can be the processing circuit 22 described above.
[0090] In the description of this specification, references to terms such as "some embodiments," "other embodiments," 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 descriptions of the above terms do not necessarily refer to the same embodiments or examples.
[0091] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0092] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.
Claims
1. An antenna device, characterized in that, include: Metal flooring; A first radiator, having a first feed point and a first grounding point connected to the metal floor; A second radiator, the second radiator having a second feed point; A third radiator, the third radiator having a second grounding point connected to the metal floor; The third radiator and the second radiator are both connected to the metal floor and are parallel to the first radiator. There is a gap between the third radiator and the second radiator. The metal floor has a groove communicating with the gap on the side away from the gap. The feed source is connected to the first feed point and the second feed point respectively. The feed source is used to excite an equivalent current to form on the first radiator to support the first frequency band, and to excite the second radiator and the third radiator to jointly support the first frequency band, so as to excite the groove to radiate an equivalent magnetic current. The equivalent magnetic current is parallel to the equivalent current and has a phase difference of 90 degrees.
2. The antenna device according to claim 1, characterized in that, The second feed point is located at one end of the second radiator that is coupled to the third radiator, and the second ground point is located at one end of the third radiator that is coupled to the second radiator.
3. The antenna device according to claim 1, characterized in that, The first grounding point is connected to a point on the metal floor near the second radiator.
4. The antenna device according to claim 1, characterized in that, Also includes: The tuning circuit is connected to the feed source and the first feed point and the second feed point respectively. The tuning circuit is used to adjust the first radiator to support the first frequency band, and to adjust the second radiator and the third radiator to jointly support the first frequency band.
5. The antenna device according to any one of claims 1-4, characterized in that, The first end of the first radiator is a free end, the second end of the first radiator is provided with the first grounding point, and the first feed point is provided between the first end and the second end of the first radiator.
6. The antenna device according to any one of claims 1-4, characterized in that, The first end and the second end of the first radiator are both free ends, and the first grounding point and the first feed point are provided between the first end and the second end of the first radiator.
7. The antenna device according to claim 6, characterized in that, In the case of including a tuning circuit, the first grounding point is located closer to the first end than the first feed point, and the distance between the first grounding point and the first end is less than the distance between the first grounding point and the second end. The tuning circuit is used to support the first radiator to operate in a first resonant mode to transmit signals in the first frequency band, and to support the first radiator to operate in a second resonant mode to transmit signals in the second frequency band. The frequency ranges of the first frequency band and the second frequency band are different. Wherein, the current distribution corresponding to the first resonant mode is from the second end to the first grounding point, and the current distribution corresponding to the second resonant mode is from the first end to the first grounding point.
8. The antenna device according to any one of claims 1 to 4, characterized in that, The first frequency band includes the GPS communication frequency band.
9. An electronic device, characterized in that, Includes the antenna device as described in any one of claims 1-8; the metal floor is at least a portion of the middle plate or circuit board in the electronic device.
10. The electronic device according to claim 9, characterized in that, Also includes: The middle frame includes the middle plate and a plurality of borders surrounding the sides of the middle plate; The first radiator is disposed on one or more borders.
11. The electronic device according to claim 10, characterized in that, The frame includes a top frame, a first side frame, a bottom frame, and a second side frame connected end to end in sequence; when the first frequency band includes the GPS communication frequency band, the first radiator is disposed on the top frame.