Cavity antenna and terminal equipment

Abstract

The embodiment of the utility model provides a cavity antenna and terminal equipment, and the cavity antenna comprises an antenna body which is provided with an open cavity; and the antenna branch knot is arranged outside the open cavity body, the antenna branch knot and the antenna body are mutually insulated and adjacently arranged, and the antenna branch knot is configured to sense and detect the capacitance value change of the antenna body.

Description

Technical Field

[0001] This application relates to the field of cavity antenna technology, specifically to a cavity antenna and terminal equipment. Background Technology

[0002] Specific Absorption Ratio (SAR) refers to the electromagnetic radiation energy absorbed by a unit mass of matter per unit time. It can be used to measure the impact of electromagnetic radiation on human health. Reducing the SAR value is a significant challenge in current antenna design. In related technologies, cavity antennas, when connected to SAR sensors, cannot accurately sense the distance between the human body and the antenna. Consequently, they cannot adjust the transmit power of the cavity antenna using the SAR sensor, thus failing to effectively reduce the SAR value of the cavity antenna. Utility Model Content

[0003] This application provides a cavity antenna and terminal device that can accurately sense the distance between a human body and the antenna after being connected to a SAR sensor. The SAR sensor can then be used to adjust the transmission power of the cavity antenna, thereby effectively reducing the SAR value of the cavity antenna.

[0004] On one hand, this application provides a cavity antenna, including: an antenna body with an open cavity; and an antenna stub disposed outside the open cavity, wherein the antenna stub and the antenna body are insulated from each other and disposed adjacent to each other, and the antenna stub is configured to sense and detect changes in the capacitance value of the antenna body.

[0005] In some embodiments, the cavity antenna includes a coaxial connecting line, the coaxial connecting line including an inner conductor and an outer conductor that are insulated from each other, the outer conductor being sleeved outside the inner conductor, the inner conductor being coupled to the antenna stub and configured to be electrically connected to a SAR sensor, and the outer conductor being electrically connected to the antenna body.

[0006] In some embodiments, the antenna body includes an electrically connected conductive shell and a metal plate, the conductive shell and the metal plate enclosing the oral cavity.

[0007] In some embodiments, the antenna body includes a plurality of grounding portions, the conductive shell and the metal plate are disposed at intervals relative to each other, and at least two sides of the metal plate are electrically connected to the conductive shell through different grounding portions.

[0008] In some embodiments, the cavity antenna is adapted to be disposed in a terminal device having at least a partially conductive outer casing, a conductive region on the outer casing forming the conductive shell, and the metal plate and the antenna stub embedded inside the outer casing.

[0009] In some embodiments, the antenna body includes an antenna circuit board and a metal plate. A conductive layer is provided on the antenna circuit board. The metal plate and the conductive layer are correspondingly disposed and electrically connected. The metal plate and the conductive layer enclose the opening to form the oral cavity.

[0010] In some embodiments, the antenna body includes a plurality of grounding portions, the conductive layer and the metal plate are disposed at intervals relative to each other, and at least two sides of the metal plate are electrically connected to the conductive layer through different grounding portions.

[0011] On the other hand, embodiments of this application provide a terminal device including the cavity antenna described in any of the above embodiments.

[0012] In some embodiments, the terminal device has an outer housing that is at least partially conductive, the antenna body includes an electrically connected conductive shell and a metal plate, a conductive region on the outer housing forms the conductive shell, the conductive shell and the metal plate enclose the opening, and the metal plate and the antenna stub are embedded inside the outer housing.

[0013] In some embodiments, the terminal device further includes a SAR sensor, the cavity antenna includes a coaxial connecting line, the coaxial connecting line includes an inner conductor and an outer conductor that are insulated from each other, the outer conductor is sleeved outside the inner conductor, the inner conductor is coupled to the antenna stub and electrically connected to the SAR sensor, and the outer conductor is electrically connected to the antenna body; and / or, the terminal device includes a main control circuit board, the main control circuit board and the cavity antenna are disposed adjacent to each other.

[0014] This application embodiment, by setting up an antenna body and antenna stubs, can utilize the antenna body and antenna stubs together to realize the antenna function, and use the antenna stubs as the SAR sensor of the cavity antenna; since the antenna stubs are located outside the open cavity and do not need to be directly grounded, when a human body approaches the cavity antenna or the terminal device where the cavity antenna is located, the antenna stubs can sense the change in the capacitance value of the antenna body and output the change in the capacitance value of the antenna body to the SAR sensor, so that the SAR sensor can determine the distance between the human body and the cavity antenna based on the change in the capacitance value of the antenna body, and then adjust the transmission power of the cavity antenna, thereby effectively reducing the SAR value of the cavity antenna. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a projection structure diagram of a cavity antenna provided in some embodiments of this application;

[0017] Figure 2 yes Figure 1 A partial AA cross-sectional view of the cavity antenna;

[0018] Figure 3 This is another projected structural diagram of the cavity antenna provided in some embodiments of this application;

[0019] Figure 4 yes Figure 3 Partial cross-sectional view of the cavity antenna (BB).

[0020] Explanation of key component symbols:

[0021] 1-Cavity antenna, 11-Antenna body, 111-Conductive shell, 112-Metal plate, 113-First grounding part, 114-Antenna circuit board, 1141-Conductive layer, 115-Second grounding part, 12-Antenna stub, 13-Coaxial connecting line, 131-Inner conductor, 132-Outer conductor, 2-Outer shell, 3-SAR sensor, 4-Main control circuit board. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0025] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0026] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0027] like Figures 1 to 4 As shown, in one aspect, this application provides a cavity antenna 1, which includes an antenna body 11 and an antenna stub 12. It can accurately measure SAR values ​​so as to adjust the transmission power of the cavity antenna 1 according to the SAR values, thereby better reducing the SAR values ​​of the cavity antenna 1.

[0028] Here, the antenna body 11 has an open cavity, allowing the antenna body 11 and the antenna stub 12 to jointly realize the antenna function of the cavity antenna 1. The antenna stub 12 is disposed outside the open cavity, and the antenna stub 12 and the antenna body 11 are insulated from each other and disposed adjacent to each other. Since the antenna stub 12 is located outside the open cavity and does not need to be directly grounded, when a human body approaches the cavity antenna 1 or the terminal device where the cavity antenna 1 is located, the antenna stub 12 connected to the SAR sensor can accurately sense the change in capacitance value of the antenna body 11.

[0029] Compared with related technologies, the cavity antenna 1 provided in this application embodiment is provided with an antenna body 11 and an antenna stub 12. The antenna body 11 and the antenna stub 12 can be used together to realize the antenna function of the cavity antenna 1, and the antenna stub 12 can be used as the SAR sensor of the cavity antenna 1. Since the antenna stub 12 is located outside the cavity and does not need to be directly grounded, when a human body approaches the cavity antenna 1 or the terminal device where the cavity antenna 1 is located, the antenna stub 12 connected to the SAR sensor can sense the change in the capacitance value of the antenna body 11 and output the change in the capacitance value of the antenna body 11 to the SAR sensor. The SAR sensor can then determine the distance between the human body and the cavity antenna 1 based on the change in the capacitance value of the antenna body 11, and then adjust the transmission power of the cavity antenna 1, thereby better reducing the SAR value of the cavity antenna 1.

[0030] In some embodiments, the cavity antenna 1 may include a coaxial connecting line 13, which includes an inner conductor 131 and an outer conductor 132 that are insulated from each other. The outer conductor 132 is sleeved outside the inner conductor 131. The inner conductor 131 is coupled to the antenna stub 12 and configured to be electrically connected to the SAR sensor 3. The outer conductor 132 is electrically connected to the antenna body 11. In this way, the feed signal of the antenna body 11 can be transmitted through the outer conductor 132 of the coaxial connecting line 13, while the capacitance change sensed by the antenna stub 12 can be output to the SAR sensor 3 through the inner conductor 131 of the coaxial connecting line 13, thereby achieving the purpose of SAR value detection and power adjustment of the cavity antenna 1.

[0031] In some embodiments, the antenna body 11 may include an electrically connected conductive shell 111 and a metal plate 112, which together form an open cavity, so that the antenna body 11 can realize the antenna function of the cavity antenna 1.

[0032] like Figure 1 and Figure 2 As shown, in some examples, the antenna body 11 may include a plurality of first grounding portions 113. The conductive shell 111 and the metal plate 112 are disposed at intervals relative to each other, and at least two sides of the metal plate 112 are electrically connected to the conductive shell 111 through different first grounding portions 113 to form the boundary conditions required for the antenna function of the cavity antenna 1.

[0033] In some examples, the cavity antenna 1 can be adapted to be installed in a terminal device; the type of terminal device can be determined according to actual needs, and can be, for example, a smartphone, tablet computer, smartwatch, etc., which is not limited in this application embodiment. The terminal device can have at least partially conductive outer shell 2, and the conductive area on the outer shell 2 forms a conductive shell 111, with the metal plate 112 and antenna branch 12 embedded inside the outer shell 2. In this way, part of the structure of the antenna body 11 of the cavity antenna 1 can be served by the conductive area of ​​the outer shell 2 of the terminal device, so that the cavity antenna 1 can be adapted to a terminal device with a conductive shell 111, simplifying the overall structure of the terminal device equipped with the cavity antenna 1. For example, the outer shell 2 of the terminal device is a metal shell, so that the outer shell 2 can be used as a whole as the conductive shell 111.

[0034] like Figure 3 and Figure 4 As shown, in some embodiments, the antenna body 11 may include an antenna circuit board 114 and a metal plate 112. The antenna circuit board 114 is provided with a conductive layer 1141, and the metal plate 112 and the conductive layer 1141 are correspondingly disposed and electrically connected. The metal plate 112 and the conductive layer 1141 enclose an open cavity body so that the antenna body 11 can realize the antenna function of the cavity antenna 1.

[0035] In some examples, the antenna body 11 may include a plurality of second ground portions 115, a conductive layer 1141 and a metal plate 112 are disposed at intervals relative to each other, and at least two sides of the metal plate 112 are electrically connected through different second ground portions 115 and conductive layers 1141 to form the boundary conditions required for the antenna function of the cavity antenna 1.

[0036] In some embodiments, the antenna stub 12 can be configured to correspond to the non-display area on the screen of the terminal device, and the antenna stub 12 can be blocked and hidden by the non-display area of ​​the screen to avoid affecting the display effect of the screen.

[0037] like Figures 1 to 4 As shown, on the other hand, embodiments of this application provide a terminal device, which includes the cavity antenna 1 of any of the above embodiments. The type of terminal device can be determined according to actual needs, and can be, for example, a smartphone, tablet computer, smartwatch, etc., and embodiments of this application do not limit this. The terminal device provided by embodiments of this application has the above-mentioned cavity antenna 1, which can accurately measure SAR values, so as to adjust the transmission power of the cavity antenna 1 according to the SAR values, thereby better reducing the SAR values ​​of the cavity antenna 1.

[0038] In some embodiments, the terminal device may have an outer shell 2 that is at least partially conductive. The antenna body 11 may include an electrically connected conductive shell 111 and a metal plate 112, with a conductive area on the outer shell 2 forming the conductive shell 111. The conductive shell 111 and the metal plate 112 enclose an open cavity, and the metal plate 112 and the antenna stub 12 are embedded inside the outer shell 2.

[0039] In some embodiments, the terminal device may further include a SAR sensor 3, and the cavity antenna 1 may include the coaxial connection line 13 described above. The inner conductor 131 of the coaxial connection line 13 may be electrically connected to the SAR sensor 3 as before.

[0040] In some embodiments, the terminal device may include a main control circuit board 4, which is disposed adjacent to the cavity antenna 1. In some embodiments, the terminal device may also include a SAR sensor 3, which may be disposed on the main control circuit board 4.

[0041] The cavity antenna and terminal device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A cavity antenna, characterized by, The cavity antenna comprises: an antenna body provided with an open cavity; an antenna branch arranged outside the open cavity, the antenna branch and the antenna body being arranged adjacent to and insulated from each other, the antenna branch being configured to inductively detect a change in the capacitance value of the antenna body.

2. The cavity antenna of claim 1, wherein, The cavity antenna comprises a coaxial connecting line, the coaxial connecting line comprising an inner conductor and an outer conductor insulated from each other, the outer conductor being sleeved outside the inner conductor, the inner conductor being coupled to the antenna branch and configured to be electrically connected to the SAR sensor, and the outer conductor being electrically connected to the antenna body.

3. The cavity antenna of claim 1, wherein, The antenna body comprises an electrically conductive shell and a metal plate electrically connected to each other, and the electrically conductive shell and the metal plate enclose the open cavity.

4. The cavity antenna of claim 3, wherein, The antenna body comprises a plurality of grounding portions, the electrically conductive shell and the metal plate being arranged in a spaced-apart manner, and at least two side edges of the metal plate being electrically connected to the electrically conductive shell through different grounding portions, respectively.

5. The cavity antenna of claim 3, wherein, The cavity antenna is adapted to be arranged in a terminal device, the terminal device having an outer shell body that is at least partially electrically conductive, and an electrically conductive region on the outer shell body forming the electrically conductive shell, and the metal plate and the antenna branch being embedded in the interior of the outer shell body.

6. The cavity antenna of claim 1, wherein, The antenna body comprises an antenna circuit board and a metal plate, the antenna circuit board being provided with an electrically conductive layer, the metal plate and the electrically conductive layer being arranged in a corresponding and electrically connected manner, and the metal plate and the electrically conductive layer enclosing the open cavity.

7. The cavity antenna of claim 6, wherein, The antenna body comprises a plurality of grounding portions, the electrically conductive layer and the metal plate being arranged in a spaced-apart manner, and at least two side edges of the metal plate being electrically connected to the electrically conductive layer through different grounding portions, respectively.

8. A terminal device, comprising: The terminal device has an outer shell body that is at least partially electrically conductive, the antenna body comprises an electrically conductive shell and a metal plate electrically connected to each other, an electrically conductive region on the outer shell body forms the electrically conductive shell, the electrically conductive shell and the metal plate enclose the open cavity, and the metal plate and the antenna branch are embedded in the interior of the outer shell body.

9. The terminal device according to claim 8, characterized by The terminal device further comprises a SAR sensor, the cavity antenna comprises a coaxial connecting line, the coaxial connecting line comprising an inner conductor and an outer conductor insulated from each other, the outer conductor being sleeved outside the inner conductor, the inner conductor being coupled to the antenna branch and electrically connected to the SAR sensor, and the outer conductor being electrically connected to the antenna body; and / or, the terminal device comprises a master control circuit board, the master control circuit board and the cavity antenna being arranged adjacent to each other.

10. The terminal device according to claim 8, characterized by ​

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