Antenna assembly and terminal device
By adopting an antenna structure with multiple suspended branches in the terminal device, the potential health hazards of antenna electromagnetic radiation to the human body are solved, the uniform distribution of current and the reduction of electromagnetic radiation are achieved, and safety is improved.
Patent Information
- Application Number
- CN202422582461.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-10-24
AI Technical Summary
Antennas in existing terminal devices emit electromagnetic radiation when in operation, causing potential health hazards to the human body.
An antenna structure with multiple suspended branches is adopted. The antenna assembly consists of a first radiator, a second radiator, a third radiator and a fourth radiator, and gaps and feeding points are set between the radiators to achieve uniform distribution of current and reduce the intensity of electromagnetic radiation.
While ensuring signal quality, it minimizes the impact of electromagnetic radiation on the human body, reduces the electromagnetic radiation value and improves safety.
Smart Images
Figure CN223321485U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of antenna technology, and in particular to an antenna assembly and a terminal device. Background Art
[0002] In the information age, mobile phones, tablets, and other terminal devices have become an integral part of daily life. However, while the antennas in these devices provide convenient communications, they also emit electromagnetic radiation during operation, posing potential health risks to humans who are exposed to it for extended periods. Utility Model Content
[0003] The present disclosure provides an antenna assembly and a terminal device to at least partially overcome the problems existing in the related art.
[0004] According to a first aspect of an embodiment of the present disclosure, there is provided an antenna assembly, applied to a terminal device, the antenna assembly comprising: a first radiator, a second radiator, a third radiator, and a fourth radiator;
[0005] A first end of the first radiator is connected to the metal middle frame of the terminal device, a gap is provided between the second end of the first radiator and the first end of the second radiator, a gap is provided between the second end of the second radiator and the first end of the third radiator, a gap is provided between the second end of the third radiator and the first end of the fourth radiator, and the second end of the fourth radiator is connected to the metal middle frame;
[0006] A first feeding point is provided on the second radiator, and a second feeding point is provided on the fourth radiator. The first feeding point and the second feeding point are used to connect to the radio frequency circuit in the terminal device.
[0007] In some embodiments of the present disclosure, a first tuning point is provided at the second end of the second radiator, and the first tuning point is used to connect to a tuning circuit in the terminal device.
[0008] In some embodiments of the present disclosure, a second tuning point is provided at the first end of the fourth radiator, and the second tuning point is used to connect to a tuning circuit in the terminal device.
[0009] In some embodiments of the present disclosure, the effective length of the antenna formed by the antenna assembly is half the wavelength of the electromagnetic wave within the working frequency band of the antenna.
[0010] In some embodiments of the present disclosure, the operating frequency band of the antenna is 0.5 GHz to 1 GHz.
[0011] In some embodiments of the present disclosure, the first radiator and the fourth radiator are L-shaped.
[0012] In some embodiments of the present disclosure, the operating frequency band of the first feeding point includes at least 0.5 to 1 GHz.
[0013] In some embodiments of the present disclosure, the operating frequency band of the second feeding point includes at least 1.5 to 3 GHz.
[0014] According to a second aspect of the embodiments of the present disclosure, a terminal device is provided, comprising the antenna assembly as described in any embodiment of the first aspect above.
[0015] In some embodiments of the present disclosure, the terminal device is a mobile phone, the mobile phone includes a metal middle frame, and the antenna assembly is integrated into the metal middle frame.
[0016] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:
[0017] The present disclosure implements an antenna structure with multiple suspended branches by using an antenna assembly comprising a first radiator, a second radiator, a third radiator, and a fourth radiator, providing gaps between the first radiator, the second radiator, the third radiator, and the fourth radiator, and providing feeding points on the second radiator and the fourth radiator, respectively. This structure allows the current flowing through the antenna to no longer be concentrated in a specific area of the antenna, but instead can be dispersed to the first radiator, the second radiator, the third radiator, and the fourth radiator, thereby reducing the energy of the entire radiator and controlling the electromagnetic radiation value within a safe range. While ensuring signal quality, it also minimizes the impact of radiation on the human body.
[0018] 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
[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0020] Figure 1 is a structural diagram of an antenna assembly according to an embodiment of the present disclosure;
[0021] Figure 2 is a schematic diagram of the arrangement of the first feeding point, the second feeding point, the first tuning point, and the second tuning point of the antenna assembly according to an embodiment of the present disclosure;
[0022] Figure 3-a is a schematic diagram of an eigenmode provided by an embodiment of the present disclosure;
[0023] Figure 3-b is a schematic diagram of a high-order mode provided by an embodiment of the present disclosure;
[0024] Figure 4 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure;
[0025] Description of reference numerals:
[0026] Metal middle frame 1; first radiator 11; second radiator 12; third radiator 13; fourth radiator 14; slit 15; first feeding point 121; first tuning point 122; second feeding point 141; second tuning point 142; terminal device 100; display screen 2. DETAILED DESCRIPTION
[0027] In the description of the embodiments of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present disclosure.
[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0029] In the embodiments of the present disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," and the like should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.
[0030] The embodiments of the present disclosure are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the embodiments of the present disclosure, but should not be understood as limiting the embodiments of the present disclosure.
[0031] like Figure 1As shown, an embodiment of the present disclosure provides an antenna assembly, which includes a radiator and a feeding point. The radiator can be a part of the metal middle frame 1 of the terminal device. In this embodiment, the radiator can be one of a ceramic antenna radiator, an FPC antenna radiator, a PCB antenna radiator, a steel sheet antenna radiator, an LDS antenna radiator, etc. The feeding point can be used to excite resonance of at least part of the radiator based on an electromagnetic wave signal. For example, a plurality of radiating branches can be provided on the radiator. When in use, the radiator can excite the resonance of the radiating branches through the electromagnetic wave signal, thereby achieving the use requirements of communication.
[0032] like Figure 1 As shown, a break 15 may be provided on the radiator, and the radiator may include a frame. The frame may be provided at the edge of the radiator and extend along the circumference of the radiator. Three breaks 15 may be provided and may be provided on the frame of the radiator. The break 15 may divide the frame into four relatively independent parts, and the four independent parts may be the first radiator 11, the second radiator 12, the third radiator 13 and the fourth radiator 14 respectively.
[0033] Correspondingly, the first end of the first radiator 11 is connected to the metal middle frame 1 of the terminal device, a break 15 is provided between the second end of the first radiator 11 and the first end of the second radiator 12, a break 15 is provided between the second end of the second radiator 12 and the first end of the third radiator 13, a break 15 is provided between the second end of the third radiator 13 and the first end of the fourth radiator 14, and the second end of the fourth radiator 14 is connected to the metal middle frame 1.
[0034] like Figure 1 As shown, the second radiator 12 and the third radiator 13 are suspended branches and are not connected to other metal parts; the first radiator 11 and the fourth radiator 14 are L-shaped; the first end of the first radiator 11 is connected to the metal middle frame 1 of the terminal device, and the second end of the first radiator 11 is suspended; the second end of the fourth radiator 14 is connected to the metal middle frame 1, and the first end of the fourth radiator 14 is suspended.
[0035] It should be noted that the frame can be a closed loop structure, that is, the frame can extend along the circumference of the radiator and close into a circle. In some other embodiments, the frame can also be a non-closed loop structure and can extend along part of the edge of the radiator.
[0036] The second radiator 12 is provided with a first feeding point 121, for example, Figure 2 As shown, one end of the first feeding point 121 can be used to connect to the second radiator 12, and the other end of the first feeding point 121 can be connected to the radio frequency circuit in the terminal device.
[0037] The fourth radiator 14 is provided with a second feeding point 141, for example, Figure 2As shown, one end of the second feeding point 141 can be used to connect to the fourth radiator 14, and the other end of the second feeding point 141 can be connected to the radio frequency circuit in the terminal device.
[0038] like Figure 3-a As shown, the embodiment of the present disclosure constructs an antenna-based eigenmode in the lower half of the mobile terminal device through multiple suspended branches, so that the current can be evenly distributed on the antenna radiator, thereby reducing the electromagnetic wave energy absorption ratio (Specific Absorption Rate, SAR) of the entire mobile terminal device. The SAR value can be used to measure the degree of human body absorption of electromagnetic radiation and is an important indicator for evaluating the electromagnetic radiation safety of mobile terminal devices.
[0039] from Figure 3-b It can be seen that the eigenmode has a uniform current distribution and the same direction as the higher-order mode, which is more conducive to energy dispersion operations. Therefore, the embodiment of the present disclosure uses multiple suspended branches and corresponding ground branches to construct a low-order eigenmode current, so that the current can be evenly and in the same direction distributed on the radiator of the antenna, further dispersing the current intensity corresponding to the eigenmode, thereby reducing the SAR value of the entire mobile terminal device.
[0040] In some embodiments, the second end of the second radiator 12 is provided with a first tuning point 122, for example, Figure 2 As shown, one end of the first tuning point 122 can be used to connect to the second radiator 12, and the other end of the first tuning point 122 can be used to connect to the tuning circuit in the terminal device.
[0041] like Figure 1 and Figure 2As shown, the first feeding point 121 of the second radiator 12 can be electrically connected to the RF signal source (i.e., the RF circuit) for wireless communication under the excitation of the RF signal source. The first feeding point 121 and the RF signal source can be electrically connected directly or indirectly. In the embodiment of the present disclosure, the indirect electrical connection between the first feeding point 121 and the RF signal source is taken as an example. For example, the first feeding point 121 and the RF signal source can be electrically connected through electrical connectors such as conductive wires, conductive columns, conductive sheets, and circuit boards. The second radiator 12 can transmit and receive electromagnetic wave signals under the excitation of the RF signal source through the first feeding point 121. That is, the RF signal can be transmitted from the connection between the first feeding point 121 and the second radiator 12 along the first feeding point 121 to the second radiator 12, and the second radiator 12 can send and receive electromagnetic wave signals under the excitation of the RF signal source. The electromagnetic wave signal on the second radiator 12 can be transmitted to the first radiator 11 through the gap 15 between the second radiator 12 and the first radiator 11 through gap coupling, and the state of the first tuning point 122 (such as the value of capacitance, inductance or switch on and off, etc.) can be adjusted so that the electromagnetic wave signal on the second radiator 12 can be transmitted to the third radiator 13 through the gap coupling via the gap 15 between the second radiator 12 and the third radiator 13, and transmitted to the fourth radiator 14 through the gap coupling via the gap 15 between the third radiator 13 and the fourth radiator 14.
[0042] like Figure 1 and Figure 2 As shown, the second feeding point 141 of the fourth radiator 14 can be electrically connected to the RF signal source (i.e., the RF circuit) for wireless communication under the excitation of the RF signal source. The second feeding point 141 and the RF signal source can be electrically connected directly or indirectly. In the embodiment of the present disclosure, the indirect electrical connection between the second feeding point 141 and the RF signal source is taken as an example. For example, the second feeding point 141 and the RF signal source can be electrically connected through electrical connectors such as conductive wires, conductive columns, conductive sheets, and circuit boards. The fourth radiator 14 can transmit and receive electromagnetic wave signals under the excitation of the RF signal source through the second feeding point 141. That is, the radio frequency signal can be transmitted from the connection between the second feeding point 141 and the fourth radiator 14 along the second feeding point 141 to the fourth radiator 14, and the electromagnetic wave signal on the fourth radiator 14 can be transmitted to the third radiator 13 through the gap 15 between the fourth radiator 14 and the third radiator 13 through slot coupling. The state of the second tuning point 142 (such as the value of capacitance, inductance or switch on and off, etc.) can be adjusted so that the electromagnetic wave signal on the third radiator 13 can be transmitted to the second radiator 12 through the gap coupling via the gap 15 between the third radiator 13 and the second radiator 12, and transmitted to the first radiator 11 through the gap coupling via the gap 15 between the second radiator 12 and the first radiator 11.
[0043] The embodiment of the present disclosure can achieve reconfiguration of the antenna frequency band by adjusting the states of the first tuning point 122 and the second tuning point 142, and the interaction between the radiators can increase the bandwidth of the corresponding frequency band, thereby further reducing the SAR value.
[0044] In some embodiments, the antenna assembly can construct a complete antenna loop. Due to the effects of the first tuning point 122, the second tuning point 142, and the multiple suspended branches, the length of the entire radiator (i.e., the antenna) can be half the wavelength (i.e., half the wavelength) of the electromagnetic wave within the operating frequency band of the entire radiator. The current of the entire radiator is evenly distributed from the first radiator 11 to the fourth radiator 14, and is the same direction of current, which greatly reduces the radiation intensity of each radiator. The operating frequency band of the entire radiator (i.e., the antenna) can be 0.5 GHz to 1 GHz.
[0045] In some embodiments, different operating frequency bands are assigned to the first feed point 121 and the second feed point 141. The present disclosure does not limit the operating frequency bands of the first feed point 121 and the second feed point 141. As an embodiment, optionally, the operating frequency band of the first feed point 121 includes at least 0.5 to 1 GHz, and the operating frequency band of the second feed point 141 includes at least 1.5 to 3 GHz, thereby ensuring that the first feed point 121 and the second feed point 141 do not interfere with each other during operation.
[0046] Furthermore, based on the antenna assembly described in the above embodiments, an embodiment of the present disclosure also provides a terminal device, which may include the antenna assembly.
[0047] In the embodiment of the present disclosure, the terminal device with the antenna assembly can effectively reduce the intensity of electromagnetic radiation, thereby reducing the potential health hazards to the human body caused by long-term exposure to electromagnetic radiation.
[0048] It should be noted that the description of the antenna structure in the above embodiments and implementations is also applicable to the terminal device of the embodiment of the present disclosure. Figure 4 . Figure 4 The following is a schematic diagram of a terminal device 100 according to an exemplary embodiment of the present disclosure. The terminal device 100 according to the present embodiment can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), mobile internet device (MID), wearable device, etc. The terminal device 100 according to the present embodiment employs the aforementioned antenna structure to achieve excellent communication performance.
[0049] This disclosure uses a mobile phone as an example. A terminal device 100 includes a display screen 2 and a metal middle frame 1 surrounding the display screen 2. The metal middle frame 1 may wrap around the outer edges of the display screen 2 and be exposed on the outside of the terminal device 100. The metal middle frame 1 may function as an antenna radiator for receiving and transmitting electromagnetic waves. In one embodiment, the display screen 2 may be a liquid crystal display.
[0050] The terminal device 100 also includes a circuit board (not shown), which is assembled inside the terminal device 100. The circuit board is provided with a radio frequency circuit, which can be connected to the metal middle frame 1. The radio frequency circuit serves as a feed source for feeding power to the metal middle frame 1, so that the metal middle frame 1 forms an antenna radiator.
[0051] As an exemplary embodiment, the antenna assembly of the embodiment of the present disclosure can be integrated into the metal shell of the terminal device 100, such as the metal middle frame 1 or the metal back plate of the terminal device 100. As another exemplary embodiment, the antenna assembly 100 can be implemented by a flexible circuit board or an anodized die-casting process. In the embodiment where the antenna assembly 100 is applied to a mobile phone, optionally, the antenna structure can be provided on the metal middle frame 1 of the mobile phone. The present disclosure does not limit the specific structure, location, and application scenario of the antenna assembly 100.
[0052] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosed embodiments disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present 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 claims.
[0053] It should be understood that the above is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the scope of protection of the present disclosure.
Claims
1. An antenna assembly, applied to a terminal device, characterized in that: The antenna assembly includes: a first radiator, a second radiator, a third radiator and a fourth radiator; A first end of the first radiator is connected to the metal middle frame of the terminal device, a gap is provided between the second end of the first radiator and the first end of the second radiator, a gap is provided between the second end of the second radiator and the first end of the third radiator, a gap is provided between the second end of the third radiator and the first end of the fourth radiator, and the second end of the fourth radiator is connected to the metal middle frame; A first feeding point is provided on the second radiator, and a second feeding point is provided on the fourth radiator. The first feeding point and the second feeding point are used to connect to the radio frequency circuit in the terminal device.
2. The antenna assembly according to claim 1, wherein: A first tuning point is provided at the second end of the second radiator, and the first tuning point is used to connect to a tuning circuit in the terminal device.
3. The antenna assembly according to claim 1, wherein: A second tuning point is provided at the first end of the fourth radiator, and the second tuning point is used to connect to the tuning circuit in the terminal device.
4. The antenna assembly according to claim 1, wherein: The effective length of the antenna formed by the antenna assembly is half the wavelength of the electromagnetic wave within the working frequency band of the antenna.
5. The antenna assembly according to claim 4, wherein: The operating frequency band of the antenna is 0.5 GHz to 1 GHz.
6. The antenna assembly according to claim 1, wherein: The first radiator and the fourth radiator are L-shaped.
7. The antenna assembly according to claim 1, wherein: The operating frequency band of the first feeding point at least includes 0.5 GHz to 1 GHz.
8. The antenna assembly according to claim 1, wherein: The operating frequency band of the second feeding point at least includes 1.5 GHz to 3 GHz.
9. A terminal device, characterized in that: The antenna assembly comprises the antenna assembly according to any one of claims 1 to 8.
10. The terminal device according to claim 9, characterized in that The terminal device is a mobile phone, which includes a metal middle frame, and the antenna assembly is integrated into the metal middle frame.