Antenna and portable electronic equipment

Abstract

The utility model provides an antenna and a portable electronic device, the antenna comprises a radiator, the radiator is provided with a plurality of radiation support arms, and the radiator is also provided with a signal feed point, a first grounding point and a second grounding point, and the first grounding point and the second grounding point are respectively located at different positions; the first grounding point is located in one radiation support arm; the second grounding point is located outside the radiator and is electrically connected with the edges of the at least two radiation support arms. According to the antenna based on the above structure, through the first grounding point, the interference of a metal shell for installing the antenna on an internal radiation field is reduced, and the radiation efficiency of the antenna in a near-field area is ensured; through the second grounding point, the coupling effect of the antenna on the external metal shell can be enhanced, and the signal receiving and transmitting capability of the antenna in a far-field area can be improved; therefore, the antenna with the structure can effectively improve the signal penetration capability of the antenna under the metalized shell, and the appearance of the metalized shell is prevented from being damaged due to the requirement of an antenna signal.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular to an antenna and a portable electronic device. Background Art

[0002] In the current design trend of portable electronic terminals such as laptops and smartphones, all-metal bodies are favored for their high-end and exquisite texture. However, this design brings challenges in antenna layout. Due to the shielding effect of metal on wireless signals, in order to ensure antenna performance, designers have to make some design compromises in the antenna area, which mainly include the following ways:

[0003] First, metal windowing is a common method, that is, opening a window of a certain shape on the metal body (usually on the metal bottom shell) to allow wireless signals to pass through. Although this method solves the signal problem to a certain extent, it undoubtedly destroys the integrated beauty of the all-metal body and affects the appearance quality of the product.

[0004] Secondly, the shell slit is also a means to meet the antenna clearance requirements. Opening a gap in the metal shell can reduce signal shielding, but it will also reduce the overall strength and aesthetics of the fuselage, and may increase the difficulty of cleaning and maintenance.

[0005] Furthermore, nano injection molding technology is applied to the antenna area, and the antenna function is realized by injecting nano materials between metal and plastic. Although this method can better maintain the integrity of the appearance, the cost is relatively high, which increases the manufacturing cost of the shell.

[0006] Finally, a design where part of the housing (such as the bottom shell) is plastic is used, that is, plastic material is used in the antenna part, and the rest of the part is kept metal. This can minimize the impact on aesthetics while ensuring antenna performance, but it will also increase costs and reduce product quality. Utility Model Content

[0007] The utility model aims to provide an antenna with strong ability of radiated signal penetrating metallized shell and a portable electronic device equipped with the antenna.

[0008] In order to achieve the above-mentioned purpose, the utility model provides an antenna, which includes a radiator, on which a plurality of radiating arms are arranged, and on which a signal feeding point and two first grounding points and a second grounding point respectively located at different positions are also arranged; the first grounding point is located in one of the radiating arms; the second grounding point is located outside the radiator and is electrically connected to the edges of at least two of the radiating arms.

[0009] Preferably, a conductive foam serving as the second grounding point is provided at the edge of the radiator.

[0010] Preferably, the radiator has a planar inverted F-shaped structure as a whole.

[0011] Preferably, the radiation branch arm comprises a main radiation unit and at least one parasitic unit.

[0012] The utility model also provides a portable electronic device, which comprises a shell and the above-mentioned antenna arranged in the shell.

[0013] Preferably, the shell includes a front shell, a bottom shell and a side wall connecting the front shell and the bottom shell, the antenna is located in a closed space formed between the front shell, the bottom shell and the side wall, the bottom shell and the side wall are metal bodies, and the front shell is a non-metal body.

[0014] Preferably, the distance between the radiator and each surface of the inner wall of the shell is less than 5 mm.

[0015] Preferably, two antennas are arranged in the shell, one of which is used for the 5G frequency band and the other is used for the 2.4G frequency band.

[0016] Preferably, the signal isolation between the two antennas is greater than or equal to 25db.

[0017] Compared with the prior art, the antenna provided by the above technical solution of the utility model, namely the first grounding point and the second grounding point, the first grounding point is located inside the radiating arm, which helps to reduce the interference of the metal shell on which the antenna is installed on the internal radiation field and ensure the radiation efficiency of the antenna in the near field area; and the second grounding point is located outside the radiator and is electrically connected to the edges of at least two radiating arms, which can enhance the coupling effect of the antenna on the external metal shell and improve the signal reception and transmission capabilities of the antenna in the far field area; it can be seen that the antenna with the above structure can effectively improve the signal penetration capability of the antenna under the metallized shell, and avoid destroying the appearance of the metallized shell due to the requirements of the antenna signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a planar structural diagram of an antenna of one frequency band in an embodiment of the utility model.

[0019] Figure 2 It is a planar structural diagram of another frequency band antenna in an embodiment of the utility model.

[0020] Figure 3 It is a longitudinal cross-sectional view of the electronic device in the embodiment of the utility model.

[0021] Figure 4The figure is a diagram for explaining the installation of two antennas in an electronic device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0023] This embodiment discloses an antenna for use in portable electronic devices, such as notebook computers, smart phones, etc. Figure 1 The antenna M includes a radiator 1, on which a plurality of radiating arms 10 are arranged, and a signal feed point D1 and two first grounding points D2 and a second grounding point D3 located at different positions are also arranged on the radiator 1. The first grounding point D2 is located inside one of the radiating arms 10, and the second grounding point D3 is located outside the radiator 1 and is electrically connected to the edges of at least two radiating arms 10. In this embodiment, the first grounding point D2 is a point-shaped structure, and the second grounding point D3 is a long strip-shaped structure, that is, the area of ​​the second grounding point D3 is much larger than the area of ​​the first grounding point D2.

[0024] The radiator 1 in this embodiment is made of a flexible or rigid printed circuit board (PCB) material to ensure good mechanical stability and radiation efficiency when the antenna M is in operation.

[0025] The length, width, spacing and shape of each radiation branch arm 10 on the radiator 1 are designed according to the target operating frequency and performance requirements of the antenna M. Therefore, the specific shape and size of each radiation branch arm 10 are not limited in this embodiment.

[0026] The signal feed point D1 is used to receive signals from the wireless communication module inside the electronic device. The signal feed point D1 is matched with the impedance of the wireless communication module to reduce signal reflection and loss.

[0027] In this embodiment, two grounding points are set on the antenna M, namely the first grounding point D2 and the second grounding point D3, which can effectively improve the signal penetration ability of the antenna M under the metallized shell. Specifically, the first grounding point D2 is located in the radiating arm 10, which helps to reduce the interference of the metal shell on which the antenna M is installed on the internal radiation field and ensure the radiation efficiency of the antenna M in the near field area. The second grounding point D3 is located outside the radiator 1 and is electrically connected to the edges of at least two radiating arms 10, which can enhance the coupling effect of the antenna M on the external metal shell and improve the signal receiving and transmitting capabilities of the antenna M in the far field area.

[0028] The design of double short-circuit grounding points helps optimize the impedance matching of antenna M, reduce the reflection loss caused by the metal shell, and improve the performance stability of antenna M in the entire working frequency band. At the same time, the setting of two grounding points is conducive to improving the directivity and gain of antenna M under the metallized shell, so that antenna M can better penetrate the metallized shell without sacrificing the aesthetic appearance of the metallized shell, and achieve excellent wireless communication effect.

[0029] On the other hand, a conductive foam serving as a second grounding point D3 is disposed at the edge of the radiator 1 .

[0030] In this embodiment, the conductive foam, as a material with good conductivity and elasticity, can effectively contact the metal shell to form a stable electrical connection. This design helps to improve the coupling efficiency between the antenna M and the metal shell and reduce the signal loss under the metal shielding. Furthermore, since the conductive foam can provide a larger contact area, this helps to reduce the requirements for the size of the antenna M itself. In a limited space, the conductive foam can be used as the second grounding point D3, which can more effectively utilize the space and make the antenna M design more compact. In addition, by setting the conductive foam as the second grounding point D3, it helps to absorb and disperse the interference signal caused by the metal shell, thereby improving the anti-interference ability of the antenna M in a complex electromagnetic environment.

[0031] In addition, the radiator 1 as a whole has a planar inverted F-shaped structure, so that the antenna M in this embodiment is a PIFA antenna M.

[0032] On the other hand, the radiation branch arm 10 includes a main radiation unit and at least one parasitic unit. In this embodiment, the frequency band bandwidth of the antenna M can be effectively increased by setting the parasitic unit.

[0033] In another embodiment of the utility model, Figure 3 , also discloses a portable electronic device, which includes a housing 2 and an antenna M having the above structure and arranged in the housing 2.

[0034] On the other hand, the shell 2 includes a front shell 20, a bottom shell 21 and a side wall 22 connecting the front shell 20 and the bottom shell 21. The antenna M is located in a closed space formed by the front shell 20, the bottom shell 21 and the side wall 22. The bottom shell 21 and the side wall 22 are metal bodies, and the front shell 20 is a non-metal body (such as plastic).

[0035] In this embodiment, since the antenna M has high radiation efficiency and strong signal penetration ability of the metal shell, the shell 2 of the electronic device is metallized on three sides, that is, the bottom shell 21 and the side walls 22 on both sides are metal, and only the surface shell 20 is non-metallic. In this way, there is no need to destroy the appearance of the metallized bottom shell 21 as in traditional electronic devices with communication functions, and it is more conducive to the ultra-thin design of the electronic device.

[0036] On the other hand, the distance between the radiator 1 and each surface of the inner wall of the housing 2 is less than 5 mm.

[0037] On the other hand, Figure 1 , Figure 2 and Figure 4 Two antennas M are arranged in the housing 2. One antenna M1 is used for the 5G frequency band, and the other antenna M2 is used for the 2.4G frequency band.

[0038] In this embodiment, the distance between the two antennas M1 and M2 is greater than or equal to 10 mm, and the signal isolation is greater than or equal to 25 db.

[0039] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. An antenna, characterized in that: It includes a radiator, on which a plurality of radiating arms are arranged, and on which a signal feeding point and two first grounding points and a second grounding point respectively located at different positions are also arranged; the first grounding point is located in one of the radiating arms; the second grounding point is located outside the radiator and is electrically connected to the edges of at least two of the radiating arms.

2. The antenna according to claim 1, characterized in that A conductive foam serving as the second grounding point is arranged at the edge of the radiator.

3. The antenna according to claim 1, characterized in that The radiator is in an overall planar inverted F-shaped structure.

4. The antenna according to claim 1, characterized in that: The radiation branch arm includes a main radiation unit and at least one parasitic unit.

5. A portable electronic device, characterized in that: The invention comprises a shell and the antenna according to any one of claims 1 to 4 arranged in the shell.

6. The portable electronic device according to claim 5, characterized in that: The shell includes a front shell, a bottom shell and a side wall connecting the front shell and the bottom shell. The antenna is located in a closed space formed between the front shell, the bottom shell and the side wall. The bottom shell and the side wall are metal bodies, and the front shell is a non-metal body.

7. The portable electronic device according to claim 6, characterized in that: The distance between the radiator and each surface of the inner wall of the shell is less than 5 mm.

8. The portable electronic device according to claim 6, characterized in that: Two antennas are arranged in the shell, one of which is used for the 5G frequency band and the other is used for the 2.4G frequency band.

9. The portable electronic device according to claim 8, characterized in that: The signal isolation between the two antennas is greater than or equal to 25db.

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