Antenna assembly of terminal

Abstract

An embodiment of the present specification discloses an antenna assembly of a terminal, comprising: a plurality of radiation units, each radiation unit comprising metal branches, the metal branches being spaced from each other and arranged in a ring shape to form a camera decoration; and a plurality of feed differential networks, each of the feed differential networks being corresponding to and electrically connected with one of the radiation units, and each of the feed differential networks being electrically connected with the same feed point.

Description

TECHNICAL FIELD

[0001] The utility model relates to mobile terminal technical field more particularly to a kind of antenna assemblies of terminal machine. BACKGROUND

[0002] RFID (Radio-Frequency Identification) is a kind of non-contact automatic identification technology, and it identifies and tracks the tag attached to the object through radio waves. With the increasing integration of terminal products, the terminal with RFID function has become the market.

[0003] The traditional terminal machine does not have RFID function due to space limitation, and the professional terminal machine specially providing RFID function generally has two solutions: 1) built-in RFID module, an RFID module with small ceramic antenna is placed near the BOM surface; 2) an external large RFID hanging warehouse is used, and a special RFID antenna is placed in the hanging warehouse. The hanging warehouse is fixed on the back of the original mobile phone through the structure, and the mobile phone with RFID hanging warehouse is generally L-shaped.

[0004] However, the above two solutions have defects: 1) the small ceramic antenna built-in has poor antenna gain due to space limitation, so the identification distance is short and the read-write ability is poor, which cannot meet the large-scale or long-distance tag identification scene; 2) the external hanging warehouse antenna generally uses four-arm spiral antenna with good antenna gain, which has good read-write ability and can adapt to large-scale and long-distance tag identification scene, but the form of external hanging warehouse not only has high cost, but also seriously affects the use scene of terminal machine - only as a professional machine for tag identification, which cannot meet the needs of daily life. SUMMARY

[0005] The embodiment of the present specification provides an antenna assembly of terminal machine, which uses camera decoration as RFID antenna to simplify the antenna design of terminal machine, so as to realize the purpose that the terminal machine can meet the needs of daily life. The antenna assembly comprises:

[0006] A plurality of radiation units, each of which comprises a metal branch, the metal branches are spaced apart and arranged in a ring shape to form a camera decoration;

[0007] A plurality of feed differential networks, each of which corresponds to and is electrically connected to one of the radiation units, and each of which is electrically connected to the same feed point.

[0008] Further, the head end of each metal branch is connected to the mainboard of the terminal machine through a metal connecting piece.

[0009] Furthermore, each of the metal connectors is connected to an inductor, and each of the inductors is connected to one of the feed differential networks.

[0010] Preferably, the number of the radiating elements and the feed differential network are both four.

[0011] Preferably, the electrical length of each of the radiating elements is 1 / 4 wavelength.

[0012] Preferably, the electrical lengths of the four feed differential networks increase sequentially by 1 / 4 wavelength.

[0013] Preferably, the metal connector is a metal spring.

[0014] Furthermore, the camera decorative piece is installed on the housing of the terminal and surrounds the periphery of the camera of the terminal.

[0015] Furthermore, the casing of the terminal is made of non-metallic material.

[0016] Furthermore, the impedance between the power supply point and each of the metal connectors is 50 ohms.

[0017] In the embodiments described in this specification, by segmenting the camera into metal sections and using different phase excitations, the camera decorative piece is used as an RFID antenna, thereby achieving high gain performance similar to an external RFID antenna with no dead zones in the radiation pattern. At the same time, the RFID antenna is located in the decorative area, far away from other antennas, minimizing its impact on other antennas inside the terminal and facilitating other anti-interference designs. Furthermore, the elimination of the need for an internal RFID antenna or an external mounting module saves costs while also enhancing the appearance, making it convenient to use as a consumer device and increasing the terminal's usability. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a camera decorative element of an antenna assembly of a terminal provided in an embodiment of this specification;

[0019] Figure 2 This is a schematic diagram of the structure of the antenna assembly of a terminal device, excluding the camera decorative parts, provided in an embodiment of this specification. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this specification clearer, the technical solutions of this specification will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this specification.

[0021] In the embodiments described in this specification, the terminal can be an electronic device such as a smartphone or tablet computer, or other devices with a camera, such as gaming devices, video / audio playback devices, or laptop computers. The terminal includes a housing and a motherboard disposed inside the housing, on which circuits and components for implementing various functions are integrated.

[0022] Please see Figure 1 This is a schematic diagram illustrating the structure of a camera decorative element in the antenna assembly of a terminal device, provided in an embodiment of this specification. See also... Figure 2 This specification provides a schematic diagram of the structure of the antenna assembly of a terminal device, excluding the camera decorative part, as an embodiment of the present invention. (In conjunction with...) Figure 1 and Figure 2 An antenna assembly for a terminal device according to an embodiment of this specification includes several radiating elements and several feed differential networks. The radiating elements and the feed differential networks correspond one-to-one and are electrically connected. Each feed differential network is electrically connected to the feed point RFOUT.

[0023] In one or more embodiments of this specification, an antenna assembly for a terminal includes four radiating elements: a first radiating element, a second radiating element, a third radiating element, and a fourth radiating element. Each radiating element includes a metal stub, a metal connector, and an inductor. For example, the first radiating element includes a first metal stub 11, the head endpoint A of which is connected to the motherboard of the terminal via a first metal connector A1, and the first metal connector A1 is connected to a first inductor L11. The second radiating element includes a second metal stub 12, the head endpoint B of which is connected to the motherboard of the terminal via a second metal connector B1, and the second metal connector B1 is connected to a second inductor L12. The third radiating element includes a third metal stub 13, the head endpoint C of which is connected to the motherboard of the terminal via a third metal connector C1, and the third metal connector C1 is connected to a third inductor L13. The fourth radiating unit includes a fourth metal branch 14. The head end D of the fourth metal branch 14 is connected to the motherboard of the terminal unit via a fourth metal connector D1. The fourth metal connector D1 is connected to the fourth inductor L14. That is to say, the metal connectors A1, B1, C1, D1, the corresponding inductors L11, L12, L13, L14, and the power supply network are all installed on the motherboard of the terminal unit. It should be understood that the number of radiating units can be increased or decreased according to actual needs. For example, when the number of radiating units is 5, it also includes a fifth radiating unit, which includes a fifth metal branch. The head end of the fifth metal branch is connected to the motherboard of the terminal through a fifth metal connector, and the fifth metal connector is connected to a fifth inductor. When the number of radiating units is 6, it also includes a fifth radiating unit and a sixth radiating unit. The fifth radiating unit includes a fifth metal branch, the head end of which is connected to the motherboard of the terminal through a fifth metal connector, and the fifth metal connector is connected to a fifth inductor. The sixth radiating unit includes a sixth metal branch, the head end of which is connected to the motherboard of the terminal through a sixth metal connector, and the sixth metal connector is connected to a sixth inductor. The same principle applies when the number of radiating units is other.

[0024] In one or more embodiments of this specification, the metal connectors A1, B1, C1, and D1 may be metal springs or other metal structures.

[0025] In one or more embodiments of this specification, the first metal branch 11, the second metal branch 12, the third metal branch 13, and the fourth metal branch 14 are spaced apart from each other (i.e., not connected to each other) and arranged in a ring to form Figure 1The camera decorative element 10 is shown. The camera decorative element 10 is installed on the back of the terminal housing 20 and surrounds the periphery of the camera (not shown). It should be understood that the number of metal branches varies depending on the number of radiating units. For example, when the number of radiating units is 5 or 6, the number of metal branches changes to 5 or 6, and the metal branches are also arranged at intervals, forming other structures such as rectangles, circles, and ellipses that can surround the periphery of the camera.

[0026] In one or more embodiments of this specification, the housing 20 of the terminal is made of plastic, plastic or other non-metallic material.

[0027] In one or more embodiments of this specification, inductors L11, L12, L13, and L14 are used to adjust the electrical length of each corresponding radiating element, such that the electrical length of each radiating element is 1 / 4 wavelength. Each radiating element can be referred to as an arm, meaning that the electrical lengths of the four arms are completely equal. For example, when the resonant center frequency of the RFID is 900MHz, the resonant length of each radiating element is approximately 900MHz. It should be understood that, in addition to inductors, capacitors can also be used to adjust the electrical length of the radiating elements; therefore, inductors can be replaced by capacitors, or by a combination of inductors and capacitors.

[0028] In one or more embodiments of this specification, an antenna assembly for a terminal includes four differential feed networks connected to inductors L11, L12, L13, and L14: a first differential feed network L21, a second differential feed network L22, a third differential feed network L23, and a fourth differential feed network L24. The electrical lengths of these four differential feed networks increase sequentially by 1 / 4 wavelength, which can also be understood as the phases increasing sequentially by 1 / 4 wavelength. For example, if the electrical length of the first differential feed network L21 is 1 / 4 wavelength, then the electrical lengths of the second differential feed network L22, the third differential feed network L23, and the fourth differential feed network L24 are 2 / 4 wavelength, 3 / 4 wavelength, and 4 / 4 wavelength, respectively. When the RFID is working, the signal is emitted from the feed point RFOUT and fed to the four arms through a 1 / 4 wavelength phase difference, so that the four arms are simultaneously excited and have a 1 / 4 phase difference in the radiation pattern, thus forming a four-arm spiral state.

[0029] In one or more embodiments of this specification, the power supply point RFOUT has a impedance of 50 ohms to each metal connector A1, B1, C1, D1.

[0030] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] The above description is merely an embodiment of this specification and is not intended to limit this specification. Various modifications and variations can be made to this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of the claims of this specification.

Claims

1. An antenna assembly for a terminal, characterized in that, include: A plurality of radiating units, each of which includes metal branches spaced apart from each other and arranged in a ring to form a camera decorative element; Several differential feed networks are provided, each of which corresponds to and is electrically connected to one of the radiating elements, and each of the differential feed networks is electrically connected to the same feed point.

2. The antenna assembly of the terminal according to claim 1, characterized in that, The head end of each of the metal branches is connected to the motherboard of the terminal via a metal connector.

3. The antenna assembly of the terminal according to claim 2, characterized in that, Each of the metal connectors is connected to an inductor, and each of the inductors is connected to one of the feed differential networks.

4. The antenna assembly of the terminal according to claim 1, characterized in that, The number of the radiating elements and the feed differential network are both four.

5. The antenna assembly of the terminal according to claim 4, characterized in that, The electrical length of each of the radiating elements is 1 / 4 wavelength.

6. The antenna assembly of the terminal according to claim 4, characterized in that, The electrical lengths of the four feed differential networks increase sequentially by 1 / 4 wavelength.

7. The antenna assembly of the terminal according to claim 2, characterized in that, The metal connector is a metal spring.

8. The antenna assembly of the terminal according to claim 1, characterized in that, The camera decorative piece is installed on the housing of the terminal and surrounds the periphery of the camera of the terminal.

9. The antenna assembly of the terminal according to claim 8, characterized in that, The casing of the terminal is made of non-metallic material.

10. The antenna assembly of the terminal according to claim 2, characterized in that, The impedance between the power supply point and each of the metal connectors is 50 ohms.

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