Antenna module and electronic equipment

Abstract

The utility model provides an antenna module and electronic equipment. The antenna module comprises an antenna body and a suspension branch knot, a feeding point is arranged between a first end and a second end of the antenna body, the second end of the antenna body is provided with a grounding point, and the suspension branch knot is arranged around the first end of the antenna body; the outline of at least one side of the suspended branch knot in the thickness direction is set to be in a periodic shape. Therefore, the outline of one side of the suspension branch knot is set to be in the periodic shape, so that the input internal resistance of the antenna module can be reduced, the mismatch loss of the antenna module is further reduced, and the effect of improving the radiation performance of the antenna is achieved.

Description

Technical Field

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

[0002] There are multiple antennas in electronic devices, each responsible for a different operating frequency band. Take the MHB antenna as an example, its operating frequency band is 1.7GHz-2.7GHz, and it is usually installed at the bottom of the electronic device. Figure 1 The MHB antenna includes an antenna feed point A1, an antenna branch A2 and a ground return rib A3. The antenna radiation performance is mainly achieved through the sub-branch B1 from the feed point to the end.

[0003] However, the bottom of the electronic device is usually provided with a USB port, a speaker or a microphone, which makes it impossible to move the feed point A1 of the MHB antenna freely. As a result, the radiation efficiency of the MHB antenna cannot reach an ideal state and is easily affected by the opposite antenna. Utility Model Content

[0004] The present disclosure provides an antenna module and an electronic device to solve the above technical problems.

[0005] According to a first aspect of the present disclosure, an antenna module is provided, which includes an antenna body and a suspended branch, a feeding point is provided between the first end and the second end of the antenna body, a grounding point is provided at the second end of the antenna body, and the suspended branch is provided around the first end of the antenna body; the contour of at least one side of the suspended branch in the thickness direction is set to a periodic shape.

[0006] Optionally, the induced current of the suspended branch fluctuates in the periodic shape.

[0007] Optionally, the side of the suspension branch that is away from the antenna body in the thickness direction and has a greater distance from the axis of the antenna body is provided with a periodic shape.

[0008] Optionally, the periodic shape includes at least one of the following: a sine wave, a wedge shape, a sawtooth shape, a semicircle shape, and a straight line shape.

[0009] Optionally, when the periodic shape has troughs and peaks in the first direction, the distance between the trough in each period and the first end of the antenna body is smaller than the distance between the peak in the same period and the first end, and the first direction is perpendicular to the axis of the antenna body.

[0010] Optionally, the ratio of the peak width to the trough width of the periodic shape is in the range of 1.6-2.32.

[0011] Optionally, the peak width ranges from 3.2 to 3.7 mm, and the trough width ranges from 1.6 to 2.0 mm.

[0012] Optionally, the thickness of the suspended branches ranges from 1.8 to 2.2 mm.

[0013] According to a second aspect of the present disclosure, an electronic device is provided, comprising a mainboard, a frame and an antenna module; the frame comprises a slit; the antenna body of the antenna module is implemented by the frame on the first side of the slit; the feeding point of the antenna module is electrically connected to the signal source on the mainboard, and the grounding point of the antenna module is electrically connected to the common ground of the electronic device.

[0014] Optionally, the suspension branch of the antenna module is arranged on the main board, and the suspension branch is arranged opposite to the antenna body of the antenna module.

[0015] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0016] The antenna module provided in this embodiment includes an antenna body and a suspension branch. A feed point is provided between the first and second ends of the antenna body, a ground point is provided at the second end of the antenna body, and the suspension branch is provided around the first end of the antenna body. The profile of at least one side of the suspension branch in the thickness direction is configured to have a periodic shape. Thus, in this embodiment, by configuring the profile of one side of the suspension branch to have a periodic shape, the input internal resistance of the antenna module is reduced, thereby reducing the mismatch loss of the antenna module and improving the antenna's radiation performance.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a block diagram of an electronic device according to an embodiment of the present disclosure.

[0019] Figure 2 This is a block diagram of another electronic device according to an embodiment of the present disclosure.

[0020] Figure 3 Schematic diagram of the periodic shape of a suspended branch according to an embodiment of the present disclosure.

[0021] Figure 4 This is a schematic diagram of a suspended branch using a periodic sine waveform according to an embodiment of the present disclosure.

[0022] Figure 5 This is a schematic diagram of a suspended branch adopting a periodic wedge shape according to an embodiment of the present disclosure.

[0023] Figure 6 This is a schematic diagram of a suspended branch using a periodic triangle according to an embodiment of the present disclosure.

[0024] Figure 7 This is a schematic diagram of a suspended branch adopting a periodic semicircle according to an embodiment of the present disclosure.

[0025] Figure 8 This is a schematic diagram of a suspended branch in a straight line according to an embodiment of the present disclosure.

[0026] Figure 9 This is a schematic diagram of a suspended branch using a sinusoidal waveform around it according to an embodiment of the present disclosure.

[0027] Figure 10 Schematic diagram of the distances between a wave crest and a wave trough and the first end of the antenna body according to an embodiment of the present disclosure.

[0028] Figure 11 This is a schematic diagram of a peak width and a trough width according to an embodiment of the present disclosure.

[0029] Figure 12 This is a block diagram of an electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure. Rather, they are merely examples of devices consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0031] Considering that the radiation efficiency of MHB antennas in related technologies cannot reach ideal levels, the present disclosure provides an antenna module and electronic device. This antenna module is applicable to electronic devices, including but not limited to smartphones, computers, digital broadcast terminals, tablets, medical devices, fitness equipment, personal digital assistants, and other devices requiring an antenna module.

[0032] The inventive concept of the antenna module provided in this embodiment is to adjust the coupling current of the antenna module to adjust the radiation performance of the antenna module, specifically, to reduce the mismatch loss of the antenna module to improve the radiation efficiency of the antenna module.

[0033] In one embodiment, see Figure 2The electronic device includes a mainboard 21, a frame 22, and an antenna module 23. The frame 22 includes a slit d. The antenna body B2 of the antenna module 23 is implemented using the frame on the first side of the slit d. The feed point A1 of the antenna module 23 is electrically connected to the signal source on the mainboard 21, and the ground point A3 of the antenna module 23 is electrically connected to the common ground GND of the electronic device. The common ground GND of the electronic device can be implemented by a large metal surface, such as the back cover or middle frame of the electronic device.

[0034] In one embodiment, see Figure 2 , the antenna module 23 also includes a suspended branch B3. Among them, a suspended branch refers to an antenna branch that is not directly connected to the common ground GND or the antenna body B2, and the suspended branch is used to excite the antenna body B2 to generate a coupling current to improve the radiation performance of the antenna. In this embodiment, the suspended branch B3 is arranged on the main board 21, and the suspended branch B3 is arranged relative to the antenna body B2 of the antenna module 23. Among them, the relative arrangement means that the suspended branch B3 is arranged around the antenna body B2, and the distance from the antenna body B2 is within a preset range. The above preset range refers to 1 to 5 mm, which can be set according to the specific scenario.

[0035] In this embodiment, the radiation efficiency of the antenna module 23 can be calculated by formula (1):

[0036]

[0037] In formula (1), E represents the radiation efficiency of the antenna module, Pout represents the output power of the antenna module, Pin represents the input power of the antenna module, LOSSmatchingcircuit represents the matching loss of the matching circuit of the antenna module, LOSSmismatch represents the mismatching loss of the matching circuit of the antenna module, and LOSSantenna represents the antenna loss of the antenna module.

[0038] Considering that the antenna loss LOSSantenna is known or fixed after the antenna module is manufactured, the antenna module's mismatch loss LOSSmismatch can be adjusted to improve the antenna efficiency of the antenna module. The calculation formulas for the mismatch loss LOSSmismatch are shown in Equations (2) and (3).

[0039]

[0040] It is understandable that when the antenna module is working normally, Iant and Vin are fixed, so the mismatch loss LOSSmismatch can be reduced by changing the environmental current Ienv, thereby improving the antenna performance.

[0041] Considering that the environmental current Ienv of the suspension branch B3 is concentrated at the edge of the suspension branch B3, in this embodiment, the environmental current Ienv can be adjusted by adjusting the structure of the suspension branch. Figure 2 and Figure 3 The antenna module 23 includes an antenna body B2 and suspended branches B3. A feed point A1 is provided between the first and second ends of the antenna body B2. A ground point A3 is provided at the second end of the antenna body B2. The suspended branches B3 are arranged around the antenna body B2, specifically in a periodic pattern at the first end. Furthermore, the profile of at least one side of the suspended branches B3 in the thickness direction is periodic.

[0042] It should be noted that a direct spatial coordinate system xyz is established, where the length of the suspension branch B3 is parallel to the x-axis, the width of the suspension branch B3 is parallel to the y-axis, and the thickness of the suspension branch B3 is parallel to the z-axis. Therefore, the improvement to the suspension branch B3 is that, when viewed from above from the z-axis, the outline of at least one side of the suspension branch B3 exhibits a periodic shape. This allows the induced current in the suspension branch to exhibit periodic fluctuations when the antenna body B2 and the suspension branch B3 are coupled.

[0043] In one embodiment, the periodic shape may include at least one of the following: a sine wave, a wedge shape, a sawtooth shape, a semicircle shape, and a straight line shape.

[0044] Take the example of the sine wave profile on one side of the suspended branch B3. Figure 4 In this scenario, when the suspended branch B3 is coupled with the antenna body B2, its current waveform is a periodic sine waveform.

[0045] Take the example of the wedge-shaped outline of one side of the suspended branch B3. Figure 5 In this scenario, when the suspended branch B3 is coupled with the antenna body B2, its current waveform is a periodic wedge.

[0046] Take the triangle outline of one side of the suspended branch B3 as an example. Figure 6 In this scenario, when the suspended branch B3 is coupled with the antenna body B2, its current waveform is a periodic triangle.

[0047] Take the example of the suspended branch B3 where one side has a periodic semicircular outline. Figure 7 In this scenario, when the suspended branch B3 is coupled with the antenna body B2, its current waveform is a periodic semicircle.

[0048] Take the example of the suspended branch B3 whose outline is a straight line. Figure 8 In this scenario, when the suspended branch B3 is coupled with the antenna body B2, its current waveform is a straight line current.

[0049] It should be noted that through simulation verification, when the periodic shape is arranged on the side edge of the suspension branch B3 far away from the antenna body B2 in the thickness direction and far away from the axis on which the antenna body B2 is located, or in other words, Figures 4 to 8 The coupling performance of the suspension branch B3 is better when the top side edge is the periodic shape, and the antenna radiation efficiency is higher at this time.

[0050] It should be noted that, Figures 4 to 8 The example of arranging the suspension branch B3 on one side as a periodic shape is illustrated. In some examples, the suspension branch B3 can also be arranged as a periodic shape around the four sides. For example, the four side profiles of the suspension branch B3 are sine wave shapes, as shown in Figure 9 In this scenario, when the suspension branch B3 is coupled with the antenna body B2, the current waveform of the suspension branch B3 is a periodic sine wave.

[0051] It should be noted that, Figures 5 to 8 The periodic shape illustrated in Figure 9 The four sides can also be implemented, and the corresponding scheme falls within the protection scope of the present disclosure.

[0052] In an embodiment, when the periodic shape has a wave trough and a wave peak in a first direction, the distance between the wave trough in each period and the first end of the antenna body B2 is less than the distance between the wave peak in the same period and the first end of the antenna body B2. The above-mentioned first direction is perpendicular to the axis on which the antenna body B2 is located, such as the y-axis direction illustrated in Figure 2 The sine wave shape illustrated in Figure 4 is taken as an example, and it can be seen from Figure 10 that in the same period, the distance between the wave trough and the first end is L1, and the distance between the wave peak and the first end is L2, and L1 is less than L2.

[0053] In an embodiment, the wave trough and the wave peak of the periodic shape have a certain width. Referring to Figure 11 , the width of the wave peak in the same period is D2, and the width of the wave trough is D1, and the ratio of D2 to D1 is in the range of 1.6-2.32. In an example, the ratio of the wave peak to the wave trough of the periodic shape of the suspension branch B3 is 2:1, which can ensure that the matching degree of the suspension branch B3 and the antenna body B2 is higher, the coupling is better, and thus the antenna input resistance is reduced.

[0054] In an example, the wave peak width D2 is in the range of 3.2-3.7 mm, and the wave trough width D1 is in the range of 1.6-2.0 mm. In another example, the thickness of the suspension branch B3 is in the range of 1.8-2.2 mm.

[0055] In an embodiment, when the suspension branch B3 adopts a sine wave shape and the ratio of the wave peak width to the wave trough width is 2:1, the antenna module 23 can improve the radiation efficiency in the B41 frequency band.

[0056] In this embodiment, by setting the contour of one side of the suspended branch to a periodic shape, the antenna body B2 and the suspended branch B3 will generate a periodic current when coupled, increasing the input current of the antenna and reducing the input impedance of the antenna, thereby reducing the mismatch loss of the antenna and ultimately improving the radiation efficiency of the antenna.

[0057] On the basis that the electronic device has the above antenna module 23, Figure 12 The electronic device 1200 may include one or more of the following components: a processing component 1202 , a memory 1204 , a power component 1206 , a multimedia component 1208 , an audio component 1210 , an input / output (I / O) interface 1212 , a sensor component 1214 , a communication component 1216 , and an image acquisition component 1218 .

[0058] The processing component 1202 generally controls the overall operation of the electronic device 1200, such as operations associated with display, phone calls, data communications, camera operation, and recording operations. The processing component 1202 may include one or more processors 1220 to execute computer programs. Furthermore, the processing component 1202 may include one or more modules to facilitate interaction between the processing component 1202 and other components. For example, the processing component 1202 may include a multimedia module to facilitate interaction between the multimedia component 1208 and the processing component 1202. In one example, the processing component may include a processor to execute the antenna control method described above.

[0059] The memory 1204 is configured to store various types of data to support operations on the electronic device 1200. Examples of such data include computer programs for any application or method operating on the electronic device 1200, contact data, phone book data, messages, pictures, videos, etc. The memory 1204 can 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, magnetic disk, or optical disk.

[0060] The power supply assembly 1206 provides power to various components of the electronic device 1200. The power supply assembly 1206 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 1200. The power supply assembly 1206 may include a power chip, and the controller may communicate with the power chip to control the power chip to turn on or off the first switching device, thereby allowing the battery to supply power to the circuit board circuit or not.

[0061] The multimedia component 1208 includes a screen that provides an output interface between the electronic device 1200 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 touch, slide, and gestures on the touch panel. The touch sensor can not only sense the boundaries of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation.

[0062] The audio component 1210 is configured to output and / or input audio file information. For example, the audio component 1210 includes a microphone (MIC), which is configured to receive external audio file information when the electronic device 1200 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 1204 or transmitted via the communication component 1216. In some embodiments, the audio component 1210 also includes a speaker for outputting the audio file information.

[0063] The I / O interface 1212 provides an interface between the processing component 1202 and peripheral interface modules, such as a keyboard, a click wheel, buttons, etc.

[0064] Sensor assembly 1214 includes one or more sensors for providing various status assessments for electronic device 1200. For example, sensor assembly 1214 can detect the open / closed state of electronic device 1200, the relative positioning of components, such as the display screen and keypad of electronic device 1200. Sensor assembly 1214 can also detect changes in the position of electronic device 1200 or a component, the presence or absence of contact between a target object and electronic device 1200, the orientation or acceleration / deceleration of electronic device 1200, and changes in the temperature of electronic device 1200. In this example, sensor assembly 1214 may include a magnetic sensor, a gyroscope, and a magnetic field sensor, and may also include an inertial sensor, an image sensor, etc., wherein the magnetic field sensor includes at least one of the following: a Hall effect sensor, a thin-film magnetoresistive sensor, and a magnetic liquid acceleration sensor.

[0065] In an exemplary embodiment, the electronic device 1200 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.

[0066] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0067] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An antenna module, characterized in that: The antenna module includes an antenna body and a suspended branch, a feeding point is provided between the first end and the second end of the antenna body, a grounding point is provided at the second end of the antenna body, and the suspended branch is provided around the first end of the antenna body; the contour of at least one side of the suspended branch in the thickness direction is set to a periodic shape.

2. The antenna module according to claim 1, wherein: The induced current of the suspended branches fluctuates in the periodic shape.

3. The antenna module according to claim 1, wherein: The side of the suspension branch which is away from the antenna body in the thickness direction and has a greater distance from the axis of the antenna body is provided with a periodic shape.

4. The antenna module according to claim 1 or 3, characterized in that: The periodic shape includes at least one of the following: a sine wave, a wedge shape, a sawtooth shape, a semicircle shape, and a straight line shape.

5. The antenna module according to claim 1, wherein: When the periodic shape has troughs and crests in the first direction, the distance between the trough in each period and the first end of the antenna body is smaller than the distance between the crest in the same period and the first end, and the first direction is perpendicular to the axis of the antenna body.

6. The antenna module according to claim 5, wherein: The ratio of the peak width to the trough width of the periodic shape ranges from 1.6 to 2.

32.

7. The antenna module according to claim 6, wherein: The peak width ranges from 3.2 to 3.7 mm, and the trough width ranges from 1.6 to 2.0 mm.

8. The antenna module according to claim 5, wherein: The thickness of the suspended branches ranges from 1.8 to 2.2 mm.

9. An electronic device, characterized in that: It includes a mainboard, a frame and an antenna module; the frame includes a slit; the antenna body of the antenna module is realized by the frame on the first side of the slit; the feeding point of the antenna module is electrically connected to the signal source on the mainboard, and the grounding point of the antenna module is electrically connected to the common ground of the electronic device.

10. The electronic device according to claim 9, characterized in that The suspension branch of the antenna module is arranged on the main board, and the suspension branch is arranged opposite to the antenna body of the antenna module.

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