Antenna and electronic device

Abstract

This disclosure relates to an antenna and an electronic device. The antenna includes: an antenna body having a feed point and a ground point, the feed point being connected to a radio frequency module of the electronic device, and the ground point being connected to a metal ground of the electronic device; the electronic device having a back cover and a middle frame, the back cover having a radiating aperture at a position opposite to the antenna body; and a radiator formed of a first part and a second part, the first part being the portion of the middle frame opposite to the radiating aperture, and the second part being the portion of the back cover located between the first part and the radiating aperture; wherein the antenna body radiates electromagnetic signals under the action of a feed current, and excites the radiator to radiate electromagnetic signals.

Description

Technical Field

[0001] This disclosure relates to the field of antenna technology, specifically to an antenna and electronic device. Background Technology

[0002] Electronic devices transmit and receive communication signals through electromagnetic induction of antennas. The number of antennas and the intensity of signal radiation directly affect the communication quality of the device.

[0003] In related technologies, electronic devices, especially tablet computers, have very limited space for antenna placement due to their compact internal space and numerous components related to various functions. As a result, antennas can only be placed in a small space, which leads to lower signal radiation intensity. Summary of the Invention

[0004] To overcome the problems existing in the related technologies, this disclosure provides an antenna and an electronic device to solve the defects in the related technologies.

[0005] According to a first aspect of the present disclosure, an antenna is provided, the antenna comprising:

[0006] The antenna body has a feed point and a ground point. The feed point is connected to the radio frequency module of the electronic device, and the ground point is connected to the metal ground of the electronic device. The electronic device has a back cover and a middle frame. The back cover has a radiation hole at a position opposite to the antenna body.

[0007] The radiator is formed of a first part and a second part, wherein the first part is the portion of the middle frame opposite to the radiation hole, and the second part is the portion of the back cover located between the first part and the radiation hole;

[0008] The antenna radiates electromagnetic signals locally under the influence of the feed current, and excites the radiator to radiate electromagnetic signals.

[0009] In some embodiments of this disclosure, the first portion belongs to the side of the midframe that is closest to the antenna in local distance; and / or

[0010] The first part is equipped with physical buttons.

[0011] In some embodiments of this disclosure, the direction of the feed current of the antenna body is parallel to the direction of the first part.

[0012] In some embodiments of this disclosure, the antenna body is adjacent to the camera of the electronic device, and the back cover has a camera hole at a position opposite to the camera;

[0013] The camera hole is adjacent to the radiation hole, or the camera hole and the radiation hole are connected to each other.

[0014] In some embodiments of this disclosure, the first portion is parallel to the arrangement direction of the camera aperture and the radiation aperture.

[0015] In some embodiments of this disclosure, the radiator is connected to a tuning spring, which is connected to the metal ground via at least one electrical component, including a resistor, a capacitor, and an inductor.

[0016] In some embodiments of this disclosure, the radiator is connected to a tuning spring, and the tuning spring is connected to the metal ground.

[0017] In some embodiments of this disclosure, the radiator is connected to a tuning spring, which is disconnected from the metal ground.

[0018] In some embodiments of this disclosure, the tuning spring is opposite to the feed point.

[0019] In some embodiments of this disclosure, the antenna local dimension in the direction parallel to the first portion is 19.5 mm; the antenna local dimension in the direction perpendicular to the first portion is 5.3 mm; and the distance between the closest position of the antenna body to the second portion and the second portion is 0.7 mm.

[0020] According to a second aspect of the present disclosure, an electronic device is provided, including an antenna as provided in any embodiment of the first aspect.

[0021] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0022] The antenna provided in this embodiment includes an antenna body and a radiator. The antenna's local feed point is connected to the radio frequency module, and its ground point is grounded. Therefore, the antenna can generate feed current and electromagnetic signals when fed by the radio frequency module. The back cover of the electronic device has a radiating hole at a position opposite to the antenna body. Therefore, a portion of the metal from the radiating hole to the middle frame (i.e., the portion of the middle frame opposite to the radiating hole, and the portion of the back cover located between the middle frame and the radiating hole) can form a radiator, which is excited by the antenna body to radiate electromagnetic signals outward. In other words, this antenna reuses a portion of the metal of the middle frame and the back cover as a radiator without adding any components, i.e., without occupying internal or external space of the device, thereby increasing the radiation range and intensity of the electromagnetic signal and improving the communication quality of the device. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] Figure 1This is a schematic diagram of the antenna structure within an electronic device, illustrating an exemplary embodiment of the present disclosure;

[0025] Figure 2 This is a schematic diagram illustrating the position and current of the tuning spring in an exemplary embodiment of this disclosure;

[0026] Figure 3 This is a schematic diagram illustrating the effect of applying different capacitances between the tuning spring and the metal ground on the antenna's scattering parameters (S-parameters) in an exemplary embodiment of this disclosure.

[0027] Figure 4 This is a schematic diagram illustrating the effect of applying different capacitances between the tuning spring and the metal ground on the system radiation efficiency of the antenna, as shown in an exemplary embodiment of this disclosure.

[0028] Figure 5 This is a schematic diagram illustrating the effect of disconnection and connection between the tuning spring and the metal ground on radiation directivity, as shown in an exemplary embodiment of this disclosure.

[0029] Figure 6 This is a structural block diagram of an electronic device illustrated in an exemplary embodiment of the present disclosure. Detailed Implementation

[0030] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0031] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0032] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0033] Based on the technical problems mentioned in the background art, in a first aspect, at least one embodiment of this disclosure provides an antenna that increases the radiation range and intensity of electromagnetic signals by reusing a portion of the metal of the mid-frame 400 and the back cover, thereby improving the communication quality of electronic devices. Especially in devices with limited installation space, such as tablet computers, this enables antennas arranged in a confined space to achieve stronger radiation intensity and a wider radiation range.

[0034] Please refer to the appendix. Figure 1 The antenna includes an antenna body 100 and a radiator 200. The antenna body 100 has a feed point and a ground point. The feed point is connected to the radio frequency module of an electronic device, and the ground point is connected to the metal ground of the electronic device. The electronic device has a back cover 300 and a middle frame 400. The back cover 300 has a radiation aperture 500 located opposite the antenna body. The radiator 200 is formed by a first portion 201 and a second portion 202. The first portion 201 is the part of the middle frame 400 opposite to the radiation aperture 500, and the second portion 202 is the part of the back cover located between the first portion 201 and the radiation aperture 500. The antenna body radiates electromagnetic signals under the action of a feed current, and excites the radiator 200 to radiate electromagnetic signals.

[0035] For example, the antenna body 100 can be positioned within an electronic device through at least one of the following embodiments to enable the radiator 200 to be excited and to obtain a greater radiation intensity and a greater radiation range.

[0036] Preferably, the first portion 201 belongs to the side of the middle frame 400 that is closest to the local distance of the antenna. In this case, the radiator 200 can be excited by the local feed current of the antenna, thereby radiating electromagnetic signals outward.

[0037] Preferably, the first part 201 is provided with a physical button 600. It should be understood that the physical button 600 on the middle frame 400 is a physical button 600 that is provided after the middle frame 400 has an opening, enabling it to connect with components inside the device. Because the middle frame 400 has an opening, the radiator 200 has a better radiation effect and produces a higher radiation intensity in this case. (See attached image) Figure 1 As shown, the first part 201 is equipped with volume buttons or a screen lock button, etc.

[0038] Preferably, the direction of the feed current of the antenna body 100 is parallel to the direction of the first portion 201. (See attached image) Figure 1 The antenna body shown has a current flowing from left to right. This increases the intensity of the electromagnetic signal radiated by the radiator 200.

[0039] Please continue to refer to the appendix. Figure 1 Preferably, the antenna body 100 is adjacent to the camera of the electronic device, and the back cover 300 has a camera hole 700 at a position opposite to the camera; the camera hole 700 is adjacent to the radiation hole 500, or the camera hole 700 and the radiation hole 500 are interconnected. It should be understood that in this case, the first portion 201 is parallel to the arrangement direction of the camera hole 700 and the radiation hole 500. Furthermore, since the camera hole 700 and the radiation hole 500 are close together, the portion of the middle frame 400 opposite to the radiation hole 500 and the portion of the back cover located between the first portion 201 and the radiation hole 500 also belong to the radiator 200. Figure 1 The radiator 200 in the middle is like this, which increases the area of ​​the radiator 200, expands the radiation range, and further improves the radiation range and intensity of the electromagnetic signal.

[0040] The above-mentioned preferred examples can be combined to maximize the radiation range and intensity of the radiator 200. For example, see attached... Figure 1 As shown, the position and size of the antenna local can be set according to the following parameters: the size of the antenna local in the direction parallel to the first part 201 is 19.5 mm; the size of the antenna local in the direction perpendicular to the first part 201 is 5.3 mm; the distance between the closest position of the antenna body 100 to the second part 202 and the second part 202 is 0.7 mm.

[0041] As another example, the radiator 200 is connected to a tuning spring. The tuning spring is connected to the metal ground via at least one electrical component, including a resistor, a capacitor, and an inductor; or, the radiator 200 is connected to the tuning spring, and the tuning spring is connected to the metal ground; or, the radiator 200 is connected to the tuning spring, and the tuning spring is disconnected from the metal ground.

[0042] The tuning spring is soldered to the motherboard of the electronic device via solder points and fixed to the motherboard. The connection between the tuning spring and the radiator 200 is achieved by the spring of the tuning spring abutting against the first part 201, thereby ensuring the connection effect.

[0043] Preferably, the tuning spring is positioned opposite the feed point. This facilitates the tuning of the radiator 200 to obtain the highest radiation intensity.

[0044] The tuning spring can adjust the direction and value of the current excited on the radiator 200, thereby adjusting the radiation intensity of the radiator 200 to obtain the highest radiation intensity. This can be achieved by sequentially connecting the tuning spring directly to the metal ground of the motherboard, connecting it through different combinations of electrical components (i.e., at least one electrical component), and disconnecting it. In each case, the direction and value of the current excited on the radiator 200 and the electromagnetic radiation intensity are detected, and the connection method between the tuning spring and the metal ground of the motherboard that yields the maximum electromagnetic radiation intensity is fixed.

[0045] The tuning process of radiator 200 will now be explained in detail with a specific example.

[0046] like Figure 2 As shown, the red triangle representing the tuning ground point indicates the location of the tuning spring, which is opposite to the feed point of the antenna body 100. By controlling the connection and disconnection of the tuning spring and the metal ground of the motherboard, the radiator 200 exhibits two completely different current distributions at the antenna operating frequency of 2.4GHz. When the spring is connected to the metal ground of the motherboard, a very strong reverse current appears in the projection area of ​​the antenna body 100 directly opposite the radiator 200 (i.e., the reverse current minus the current corresponding to ground in the figure). This current cancels the radiation of the antenna body 100 in the far field, thus affecting the antenna efficiency. This is the effect of the limited space. When the tuning spring is disconnected from the metal ground of the motherboard, the reverse current (i.e., the reverse current minus the current corresponding to the open circuit in the figure) is completely offset from the projection area of ​​the antenna body 100 directly opposite the radiator 200, effectively compensating for the negative reverse current radiation of the antenna. The radiator 200 becomes part of the antenna radiation, thereby increasing the antenna radiation area. This cavity radiation can improve the antenna efficiency by 2dB+.

[0047] To further refine the impact of the tuning spring on antenna efficiency, different capacitors can be applied between the tuning spring and the metal ground of the motherboard, effectively altering the return path of the antenna's reverse current. For example... Figure 3 As shown, when the tuning capacitor decreases from 3pF to 1.5pF, the return-to-ground impedance increases for the 2.4GHz band, and the coupled radiation mode of radiator 200 gradually approaches the operating frequency band; conversely, it continuously moves away from the operating frequency band. Figure 4 As the capacitance decreases and the return impedance increases, the efficiency curve of the antenna in the 2.4G band continues to rise. Compared with a 3pF capacitor, a 1.5pF capacitor can improve efficiency by 2dB+, which is highly consistent with our previous current analysis results.

[0048] Therefore, after tuning, the tuning spring can be disconnected from the metal ground of the motherboard, or a 1.5pF capacitor can be loaded between the tuning spring and the metal ground of the motherboard.

[0049] As can be seen from the above embodiments, because the radiator 200 participates in radiation, and the radiator 200 itself is less obstructed by the screen metal, the component of its coupled radiation mode radiated towards the screen is much greater than that of the antenna body 100. Therefore, this design can effectively increase the radiation component towards the screen, thereby improving the omnidirectional radiation of the antenna. Figure 5 As can be seen, when the tuning spring is connected to the metal ground of the motherboard, the radiation pattern of the antenna completely surrounds the connected state when the tuning spring is disconnected from the metal ground of the motherboard, indicating that the radiation directivity is better in this state.

[0050] According to a second aspect of the present disclosure, an electronic device is provided, including an antenna as provided in any embodiment of the first aspect.

[0051] Please refer to the appendix. Figure 6 The diagram illustrates, for example, a block diagram of an electronic device. For instance, device 600 could be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0052] Reference Figure 6 The device 600 may include one or more of the following components: a processing component 602, a memory 604, a power supply component 606, a multimedia component 608, an audio component 610, an input / output (I / O) interface 612, a sensor component 614, and a communication component 616.

[0053] Processing component 602 typically controls the overall operation of device 600, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 602 may include one or more processors 620 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 602 may include one or more modules to facilitate interaction between processing component 602 and other components. For example, processing component 602 may include a multimedia module to facilitate interaction between multimedia component 608 and processing component 602.

[0054] Memory 604 is configured to store various types of data to support the operation of device 600. Examples of this data include instructions for any application or method operating on device 600, contact data, phonebook data, messages, pictures, videos, etc. Memory 604 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 storage, flash memory, magnetic disk, or optical disk.

[0055] The power supply component 606 provides power to the various components of the device 600. The power supply component 606 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the device 600.

[0056] Multimedia component 608 includes a screen that provides an output interface between the device 600 and the user. 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 touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 608 includes a front-facing camera and / or a rear-facing camera. When the device 600 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0057] Audio component 610 is configured to output and / or input audio signals. For example, audio component 610 includes a microphone (MIC) configured to receive external audio signals when device 600 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 604 or transmitted via communication component 616. In some embodiments, audio component 610 also includes a speaker for outputting audio signals.

[0058] I / O interface 612 provides an interface between processing component 602 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0059] Sensor assembly 614 includes one or more sensors for providing status assessments of various aspects of device 600. For example, sensor assembly 614 may detect the on / off state of device 600, the relative positioning of components such as the display and keypad of device 600, changes in the position of device 600 or a component of device 600, the presence or absence of user contact with device 600, the orientation or acceleration / deceleration of device 600, and temperature changes of device 600. Sensor assembly 614 may also include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 614 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 614 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0060] Communication component 616 is configured to facilitate wired or wireless communication between device 600 and other devices. Device 600 can access wireless networks based on communication standards, such as WiFi, 2G or 3G, 4G or 5G, or combinations thereof. In one exemplary embodiment, communication component 616 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 616 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0061] In an exemplary embodiment, device 600 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 to perform control of devices such as DC-DC converters by the aforementioned electronic devices.

[0062] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0063] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An antenna, characterized in that, The antenna includes: The antenna body has a feed point and a ground point. The feed point is connected to the radio frequency module of the electronic device, and the ground point is connected to the metal ground of the electronic device. The electronic device has a back cover and a middle frame. The back cover has a radiation hole at a position opposite to the antenna body. The radiator is formed of a first part and a second part, wherein the first part is the portion of the middle frame opposite to the radiation hole, and the second part is the portion of the back cover located between the first part and the radiation hole; The antenna radiates electromagnetic signals locally under the influence of the feed current, and excites the radiator to radiate electromagnetic signals.

2. The antenna according to claim 1, characterized in that, The first portion belongs to the edge of the middle frame that is closest to the local distance of the antenna; and / or, The first part is equipped with physical buttons.

3. The antenna according to claim 1, characterized in that, The direction of the feed current of the antenna body is parallel to the direction of the first part.

4. The antenna according to claim 1, characterized in that, The antenna body is adjacent to the camera of the electronic device, and the back cover has a camera hole at a position opposite to the camera; The camera hole is adjacent to the radiation hole, or the camera hole and the radiation hole are connected to each other.

5. The antenna according to claim 4, characterized in that, The first part is parallel to the arrangement direction of the camera hole and the radiation hole.

6. The antenna according to claim 1, characterized in that, The radiator is connected to a tuning spring, which is connected to the metal ground via at least one electrical component, including a resistor, a capacitor, and an inductor.

7. The antenna according to claim 1, characterized in that, The radiator is connected to a tuning spring, which is connected to the metal ground.

8. The antenna according to claim 1, characterized in that, The radiator is connected to a tuning spring, which is disconnected from the metal ground.

9. The antenna according to any one of claims 6 to 8, characterized in that, The tuning spring is opposite to the feed point.

10. The antenna according to claim 1, characterized in that, The antenna body has a dimension of 19.5 mm in the direction parallel to the first part; the antenna body has a dimension of 5.3 mm in the direction perpendicular to the first part; and the distance between the closest point of the antenna body to the second part and the second part is 0.7 mm.

11. An electronic device, characterized in that, Includes the antenna described in any one of claims 1 to 10.

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