Antenna module and electronic equipment

Abstract

The utility model provides an antenna module and electronic equipment. The antenna module comprises an antenna body, a first end of the antenna body is provided with a grounding point, a feeding point is arranged between the first end and a second end of the antenna body, and a magnetic field guiding point is arranged between the second end of the antenna body and the feeding point. And the magnetic field guiding point is used for adjusting the magnetic field space position of the antenna module in a specified frequency band. According to the embodiment, the magnetic field guiding point can pull the magnetic field of the antenna to deviate towards the second end of the antenna body, and the radiation performance of the antenna is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to an antenna module and an electronic device. Background Art

[0002] Multiple antennas are provided in an electronic device, and each antenna is responsible for a different operating frequency band. In related technologies, 5G communication and NFC communication are usually designed in a common frame. The longer the communication antenna length, the better the NFC communication performance. The Sub6G frequency band of 5G communication is a high-order mode of current. As the antenna length increases, the antenna performance of the high-order mode is poor. Summary of the Invention

[0003] The present disclosure provides an antenna module and an electronic device to solve the above technical problems.

[0004] According to a first aspect of the present disclosure, there is provided an antenna module, the antenna module includes an antenna body, a grounding point is provided at a first end of the antenna body, a feeding point is provided between the first end and the second end of the antenna body, and a magnetic field guiding point is provided between the second end of the antenna body and the feeding point, and the magnetic field guiding point is used to adjust the magnetic field spatial position of the antenna module in a specified frequency band.

[0005] Optionally, the antenna module further includes a magnetic field guiding circuit, a first end of the magnetic field guiding circuit is electrically connected to the magnetic field guiding point, and a second end of the magnetic field guiding circuit is grounded.

[0006] Optionally, the equivalent impedance of the magnetic field guiding circuit is a capacitive impedance.

[0007] Optionally, the magnetic field guiding circuit is implemented by a first capacitor, the capacitance value of the first capacitor is greater than or equal to a preset capacitor threshold; and the greater the capacitance value of the first capacitor, the stronger the ability to adjust the magnetic field space.

[0008] Optionally, the value range of the preset capacitor threshold is 1 to 5 pF.

[0009] Optionally, the antenna module includes a first tuning circuit, the first tuning circuit is arranged between the 5G signal source and the feeding point; the first tuning circuit is used to adjust the frequency of the 5G signal source signal.

[0010] Optionally, the first tuning circuit includes a first inductor, a second capacitor, a second inductor and a third capacitor; a first end of the first inductor is electrically connected to the feeding point and a first end of the second capacitor respectively, a second end of the first inductor is grounded; a first end of the second inductor is connected to a second end of the second capacitor, a second end of the second inductor is electrically connected to a first end of the third capacitor and the 5G signal source respectively; a second end of the third capacitor is grounded.

[0011] Optionally, the antenna module further includes a second tuning circuit disposed between the NFC chip and the magnetic field guiding point; the second tuning circuit is used to adjust the frequency of the NFC chip signal.

[0012] Optionally, the antenna module further includes a parasitic stub, a slit is provided between the parasitic stub and the antenna body; a parasitic ground point is provided at one end of the parasitic stub away from the slit.

[0013] According to a second aspect of the present disclosure, there is provided an electronic device, the electronic device includes a main board, a frame and an antenna module; the frame includes a slit, and the antenna body of the antenna module is implemented by using the frame on the first side of the slit; a 5G signal source and an NFC chip are provided on the main board; the 5G signal source is electrically connected to the feeding point of the antenna module, and the NFC chip is electrically connected to the magnetic field guiding point.

[0014] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0015] The antenna module provided in this embodiment includes an antenna body, a grounding point is provided at the first end of the antenna body, a feeding point is provided between the first end and the second end of the antenna body, and a magnetic field guiding point is provided between the second end of the antenna body and the feeding point. The magnetic field guiding point is used to adjust the magnetic field spatial position of the antenna module in a specified frequency band. In this way, in this embodiment, by setting the magnetic field guiding point, the magnetic field of the antenna can be pulled to shift towards the second end of the antenna body, improving the radiation performance of the antenna.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Description of the Drawings

[0017] Figure 1 It is a block diagram of an electronic device according to an embodiment of the present disclosure.

[0018] Figure 2 It is a schematic diagram of a magnetic field guiding circuit according to an embodiment of the present disclosure.

[0019] Figure 3 It is a circuit diagram of a magnetic field guiding circuit according to an embodiment of the present disclosure.

[0020] Figure 4 It is a schematic diagram of a first tuning circuit according to an embodiment of the present disclosure.

[0021] Figure 5 It is a circuit diagram of a first tuning circuit according to an embodiment of the present disclosure.

[0022] Figure 6 Schematic diagram of a second tuning circuit according to an embodiment of the present disclosure.

[0023] Figure 7 Circuit diagram of a second tuning circuit according to an embodiment of the present disclosure.

[0024] Figure 8 Magnetic field profile diagram before setting the magnetic field guiding circuit according to an embodiment of the present disclosure.

[0025] Figure 9 Magnetic field profile diagram after setting the magnetic field guiding circuit according to an embodiment of the present disclosure.

[0026] Figure 10 Schematic diagram of radiation efficiency before and after setting the magnetic field guiding circuit according to an embodiment of the present disclosure.

[0027] Figure 11 Block diagram of an electronic device according to an embodiment of the present disclosure. Detailed implementation manners

[0028] Here, exemplary embodiments will be described in detail, and examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] Considering the problem of poor antenna performance caused by the high-order modes of the current on the antenna stub during 5G communication in the related art, the embodiment of the present disclosure provides an antenna module. The inventive concept lies in setting a magnetic field guiding point between the slot and the feeding point of the antenna module, and adjusting the magnetic field direction through the magnetic field guiding point to enhance the radiation performance of the antenna in the 5G frequency band (Sub6G frequency band).

[0030] See Figure 1 , the electronic device includes a main board 20, a frame 30, and an antenna module 10; the frame 30 includes a slot d, the antenna body of the antenna module 10 is implemented by the frame on the first side of the slot d, and the parasitic stub of the antenna is implemented by the frame on the second side of the slot d; a 5G signal source and an NFC chip are provided on the main board 20; the 5G signal source S1 is electrically connected to the feeding point of the antenna module 10, and the NFC chip S2 is electrically connected to the magnetic field guiding point.

[0031] Continue to see Figure 1 , the antenna module 10 includes an antenna body 11, and the first end of the antenna body 11 (i.e., Figure 1At the left end), a ground point a is provided, and a feeding point b is provided between the first end and the second end of the antenna body 11. Between the second end of the antenna body 11 (i.e., Figure 1 the right end) and the feeding point b, a magnetic field guiding point c is provided. The magnetic field guiding point c is used to adjust the magnetic field spatial position of the antenna module 10 in a specified frequency band.

[0032] In one embodiment, continue to refer to Figure 1 Figure, the antenna module 10 further includes a parasitic stub 12. A slit d is provided between the parasitic stub 12 and the antenna body 11; a parasitic ground point e is provided at one end of the parasitic stub 12 away from the slit d.

[0033] Taking the antenna module 10 operating in the N78 frequency band (3300 MHz to 4200 MHz) as an example, continue to refer to Figure 1 Figure, the distance ad between the ground point a and the second end of the antenna body, that is, the subsequent slit d, is 45 - 50 mm, the distance cd between the slit d and the magnetic field guiding point c is 6 - 8 mm, and the distance ab between the ground point a and the feeding point b is 20 - 25 mm. Those skilled in the art can select the positions of the ground point a, the feeding point b, and the magnetic field guiding point c between the first end and the second end according to the specific scenario to achieve the effect of adjusting the operating frequency band of the antenna module 10.

[0034] In one embodiment, refer to Figure 2 Figure, the antenna module 10 includes a magnetic field guiding circuit 21. Among them, the first end of the magnetic field guiding circuit 21 is electrically connected to the magnetic field guiding point c, and the second end of the magnetic field guiding circuit 21 is grounded. In this embodiment, the equivalent impedance of the magnetic field guiding circuit 21 exhibits capacitive impedance and can be implemented by, for example, at least one capacitor, an LC circuit, an RC circuit, or an RLC circuit, etc. The corresponding circuits fall within the protection scope of the present disclosure.

[0035] In one example, refer to Figure 3 Figure, the magnetic field guiding circuit 21 is implemented by a capacitor, such as the first capacitor C1. The capacitance value of the first capacitor C1 is greater than or equal to a preset capacitor threshold. Among them, the value range of the preset capacitor threshold is 1 - 5 pF. In this example, the preset capacitor threshold is 2 pF. It can be understood that the larger the capacitance value of the first capacitor C1, the stronger its ability to pass high-order mode current and the stronger its ability to pull the magnetic field direction.

[0036] It should be noted that Figure 3 Figure exemplifies a case of a capacitor. In practical applications, the magnetic field guiding circuit 21 can be formed by connecting two or more capacitors in series or in parallel. When the equivalent capacitance value exceeds 2 pF, the corresponding solutions fall within the protection scope of the present disclosure.

[0037] In one embodiment, refer to Figure 4, the antenna module 10 further includes a first tuning circuit 41, and the first tuning circuit 41 is disposed between the 5G signal source S1 and the feeding point b; the first tuning circuit 41 is used to adjust the frequency of the signal of the 5G signal source S1, so as to ensure the radiation efficiency of the antenna module 10.

[0038] In one embodiment, refer to Figure 5 , the first tuning circuit 41 includes a first inductor L1, a second capacitor C2, a second inductor L2 and a third capacitor C3; the first end ( Figure 5 the right end as shown in the example) of the first inductor L1 is electrically connected to the feeding point b and the first end ( Figure 5 the upper end as shown in the example) of the second capacitor C2 respectively, and the second end ( Figure 5 the left end as shown in the example) of the first inductor L1 is grounded; the first end of the second inductor L2 is electrically connected to the second end ( Figure 5 the lower end as shown in the example) of the second capacitor C2, and the second end ( Figure 5 the lower end as shown in the example) of the second inductor L2 is electrically connected to the first end ( Figure 5 the right end as shown in the example) of the third capacitor C3 and the 5G signal source S1 respectively; the second end ( Figure 5 the left end as shown in the example) of the third capacitor C3 is grounded to GND. In this way, the first tuning circuit 41 can resonate within the operating frequency band of the antenna module 10 to filter out clutter in other frequency bands, so as to improve the radiation performance.

[0039] In one embodiment, refer to Figure 6 , the antenna module 10 further includes a second tuning circuit 61, and the second tuning circuit 61 is disposed between the NFC chip S2 and the magnetic field guiding point c; the second tuning circuit 61 is used to adjust the frequency of the signal of the NFC chip S2. In this way, in this embodiment, by means of the second signal source, an additional antenna can be added to achieve the effect of improving the antenna performance.

[0040] In one embodiment, refer to Figure 7 , the second tuning circuit 61 includes a third inductor L3 and a fourth capacitor C4. The first end of the third inductor L3 is electrically connected to the magnetic field guiding point c and the first end of the magnetic field guiding circuit 21 respectively, the first end of the third inductor L3 is electrically connected to the first end of the fourth capacitor C4 and the NFC chip S2 respectively, and the second end of the fourth capacitor C4 is grounded. In this way, the second tuning circuit 61 can adjust the frequency of the signal of the NFC chip S2.

[0041] In Figures 1 to 7 the antenna module shown in the example, simulation is performed on the antenna module, including:

[0042] Refer to Figure 8, the magnetic field profile of the high-order mode when the antenna module operates in the N78 band, where points F1 and F2 are current zeros, point F is at a quarter-wavelength position, point G is at a half-wavelength position, point H is at a half-wavelength position, and the N78 band is a high-order mode of five-quarter wavelengths.

[0043] In this embodiment, a magnetic field guiding point c is added at the position between the feeding point b and the slot d, that is, at point H. It can also be understood that the half-wavelength position is where the magnetic field weakens. Then, magnetic field guiding is carried out through the first capacitor C1, so that the magnetic field radiation at point H is enhanced, and the overall magnetic field migrates towards the slot d. The effect is as Figure 9 shown. Refer to Figure 9 . At point H, the strong magnetic field point extends to the right, and the magnetic field radiation is enhanced; point F1 remains unchanged, and the magnetic field at point F2 is enhanced, making the radiation performance of the optimized scheme better.

[0044] Refer to Figure 10 . Curve 2 represents the antenna radiation efficiency curve before adding the magnetic field guiding point c, and curve 1 represents the antenna radiation efficiency curve after adding the magnetic field guiding point c. When the antenna module operates at 3.6 GHz, the magnetic field guiding point c and the first capacitor C1 can adjust the magnetic field spatial position to achieve the purpose of magnetic field guiding, thereby improving the radiation efficiency of the antenna module. Moreover, the NFC antenna performance can also be improved.

[0045] Figure 11 is a block diagram of an electronic device shown according to an exemplary embodiment. For example, the electronic device 1100 can be a smart phone, a computer, a digital broadcast terminal, a tablet device, a medical device, a fitness device, a personal digital assistant, etc. This electronic device can be used as the above-mentioned first device or the peer device.

[0046] Referring to Figure 11 , the electronic device 1100 may include one or more of the following components: a processing component 1102, a memory 1104, a power supply component 1106, a multimedia component 1108, an audio component 1110, an input / output (I / O) interface 1112, a sensor component 1114, a communication component 1116, and an image acquisition component 1118.

[0047] The processing component 1102 generally controls the overall operation of the electronic device 1100, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 1102 may include one or more processors 1120 to execute computer programs. In addition, the processing component 1102 may include one or more modules to facilitate the interaction between the processing component 1102 and other components. For example, the processing component 1102 may include a multimedia module to facilitate the interaction between the multimedia component 1108 and the processing component 1102. In one example, the processing component may include a processor for executing the above-described antenna control method.

[0048] The memory 1104 is configured to store various types of data to support the operation of the electronic device 1100. Examples of such data include computer programs for any application or method operating on the electronic device 1100, contact data, phone book data, messages, pictures, videos, and the like. The memory 1104 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0049] The power component 1106 provides power to various components of the electronic device 1100. The power component 1106 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the electronic device 1100. The power component 1106 may include a power chip, and the controller can communicate with the power chip to control the power chip to turn on or off the first switching device, so that the battery supplies power or does not supply power to the circuit board circuit.

[0050] The multimedia component 1108 includes a screen that provides an output interface between the electronic device 1100 and the target object. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input information from the target object. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of touch or swipe actions, but also detect the duration and pressure associated with the touch or swipe operation.

[0051] The audio component 1110 is configured to output and / or input audio file information. For example, the audio component 1110 includes a microphone (MIC), which is configured to receive external audio file information when the electronic device 1100 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio file information can be further stored in the memory 1104 or transmitted via the communication component 1116. In some embodiments, the audio component 1110 further includes a speaker for outputting audio file information.

[0052] The I / O interface 1112 provides an interface between the processing component 1102 and a peripheral interface module, which may be a keyboard, a click wheel, buttons, etc.

[0053] The sensor component 1114 includes one or more sensors for providing an assessment of various aspects of the status of the electronic device 1100. For example, the sensor component 1114 can detect the on / off state of the electronic device 1100, the relative positioning of components, such as the display screen and keypad of the electronic device 1100. The sensor component 1114 can also detect a change in the position of the electronic device 1100 or a component, the presence or absence of contact of a target object with the electronic device 1100, the orientation or acceleration / deceleration of the electronic device 1100, and the temperature change of the electronic device 1100. In this example, the sensor component 1114 can include a magnetic sensor, a gyroscope, and a magnetic field sensor, and can also include an inertial sensor, an image sensor, etc., where the magnetic field sensor includes at least one of the following: a Hall sensor, a thin film magnetoresistive sensor, and a magnetic fluid acceleration sensor.

[0054] The communication component 1116 is configured to facilitate communication between the electronic device 1100 and other devices in a wired or wireless manner. The electronic device 1100 can access a wireless network based on communication standards, such as WiFi, 2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 1116 receives broadcast information or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1116 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies. In one example, the communication component 1116 includes an antenna module as Figures 1 to 10 shown in the example.

[0055] In an exemplary embodiment, the electronic device 1100 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0056] Those skilled in the art will readily conceive of other embodiments of the present disclosure upon considering the specification and practicing the disclosure herein. The present disclosure is intended to cover any variations, uses, or adaptations of the disclosure following the general principles of the disclosure and including common general knowledge or conventional technical means in the art not disclosed herein. The specification and examples are only exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0057] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. An antenna module, characterized in that: The antenna module includes an antenna body, a grounding point is arranged at the first end of the antenna body, a feeding point is arranged between the first end and the second end of the antenna body, a magnetic field guidance point is arranged between the second end of the antenna body and the feeding point, and the magnetic field guidance point is used to adjust the spatial position of the magnetic field of the antenna module in a specified frequency band.

2. The antenna module according to claim 1, characterized in that: The antenna module further comprises a magnetic field steering circuit, a first end of the magnetic field steering circuit is electrically connected to the magnetic field steering point, and a second end of the magnetic field steering circuit is grounded.

3. The antenna module according to claim 2, characterized in that: The equivalent impedance of the magnetic field directing circuit is capacitive impedance.

4. The antenna module according to claim 3, characterized in that: The magnetic field steering circuit is implemented by a first capacitor, the capacitance value of the first capacitor is greater than or equal to a preset capacitance threshold; and the larger the capacitance value of the first capacitor is, the stronger the ability to adjust the magnetic field space is.

5. The antenna module according to claim 4, characterized in that: The preset capacitance threshold value ranges from 1 to 5 pF.

6. The antenna module according to claim 1, characterized in that: The antenna module includes a first tuning circuit, which is arranged between the 5G signal source and the feeding point; the first tuning circuit is used to adjust the frequency of the 5G signal source signal.

7. The antenna module according to claim 6, characterized in that: The first tuning circuit includes a first inductor, a second capacitor, a third inductor and a third capacitor; the first end of the first inductor is electrically connected to the feeding point and the first end of the second capacitor, respectively, and the second end of the first inductor is grounded; the first end of the second inductor is electrically connected to the second end of the second capacitor, and the second end of the second inductor is electrically connected to the first end of the third capacitor and the 5G signal source, respectively; the second end of the third capacitor is grounded.

8. The antenna module according to claim 6, characterized in that: The antenna module also includes a second tuning circuit, which is arranged between the NFC chip and the magnetic field guidance point; the second tuning circuit is used to adjust the frequency of the NFC chip signal.

9. The antenna module according to claim 1, characterized in that: The antenna module also includes a parasitic branch, and a fracture is arranged between the parasitic branch and the antenna body; a parasitic return point is arranged at one end of the parasitic branch away from the fracture.

10. An electronic device, characterized in that: The electronic device includes a main board, a frame and an antenna module; the frame includes a fracture, and the antenna body of the antenna module is realized by the frame on the first side of the fracture; a 5G signal source and an NFC chip are arranged on the main board; the 5G signal source is electrically connected to the feeding point of the antenna module, and the NFC chip is electrically connected to the magnetic field steering point.

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