CN108736131B

CN108736131B - Antenna assembly and electronic device

Info

Publication number: CN108736131B
Application number: CN201810770883.2A
Authority: CN
Inventors: 胡兴邦
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-07-13
Filing date: 2018-07-13
Publication date: 2020-09-04
Anticipated expiration: 2038-07-13
Also published as: CN108736131A

Abstract

The application discloses antenna assembly, this antenna assembly includes: the printed circuit board is provided with a feed source; the grounding surface is arranged on the printed circuit board, and a first grounding point is arranged on the grounding surface; the metal frame is arranged on the periphery of the printed circuit board in a surrounding mode, a gap is arranged between the metal frame and the ground plane at an interval, the metal frame comprises a first connecting point and a second connecting point, the feed source is connected with the first connecting point, the second connecting point is grounded through the first grounding point, the part of the metal frame from the first connecting point to the second connecting point forms a first antenna radiator, and the first antenna radiator utilizes the gap to transmit or receive signals. The structure utilizes a part of the metal frame as a first antenna radiator to generate and receive signals, the metal frame is a complete closed loop and is not provided with a broken seam, and therefore the whole electronic device using the antenna assembly has better strength and better appearance texture. The application also provides an electronic device comprising the antenna assembly.

Description

Antenna assembly and electronic device

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to an antenna assembly and an electronic device.

Background

Antennas are arranged on electronic devices such as mobile phones and tablet computers for communication, and at present, a metal frame of a metal shell is generally provided with a broken seam so as to meet the performance requirement of the frequency band of the antenna. However, such a broken seam affects the appearance of the entire mobile phone and the appearance and feel of the entire electronic device, and the cost of the broken seam processing is high. On the other hand, the requirement of the broken seam on the width of the broken seam is high in the processing process, and if the width is too large, the appearance and the strength of the electronic device are influenced; conversely, too small width may cause mutual coupling between the two sides of the broken seam, and the smaller the width of the broken seam, the stronger the coupling, which may seriously affect the performance of the antenna.

Disclosure of Invention

Set up the crack to electronic device such as cell-phone and lead to electronic device structural strength poor and the not good technical problem of exogenesis feel on the metal frame, this application provides an antenna module and electronic device.

The technical scheme adopted by the application is as follows: an antenna assembly is provided, comprising:

the printed circuit board is provided with a feed source;

the grounding surface is arranged on the printed circuit board, and a first grounding point is arranged on the grounding surface;

the metal frame surrounds the periphery of the printed circuit board, a gap is arranged between the metal frame and the ground plane at an interval, the metal frame comprises a first connection point and a second connection point, the feed source is connected with the first connection point, the second connection point is grounded through the first ground point, a part of the metal frame from the first connection point to the second connection point forms a first antenna radiator, and the first antenna radiator utilizes the gap to transmit or receive signals.

The present application also provides an electronic device comprising the antenna assembly described above.

In the antenna module and the electronic device in this application, set up the feed on printed circuit board, set up a gap between ground plane and the metal frame, set up the ground point on the ground plane. The metal frame is provided with a first connection point and a second connection point, the feed source is connected with the first connection point, the second connection point is grounded through a grounding point, the part of the metal frame from the first connection point to the second connection point forms an antenna radiation body, and the antenna radiation body transmits or receives signals by utilizing a gap. Above structure, metal frame are complete closed loop, do not set up the crack, and then make the whole electronic device who uses this antenna module have better intensity, have the outward appearance feel of preferred simultaneously.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of an electronic device according to the present application;

FIG. 2 is a schematic structural diagram of an embodiment of an antenna assembly of the present application;

FIG. 3 is a schematic structural view of another embodiment of an antenna assembly of the present application;

FIG. 4 is a schematic diagram of an antenna assembly according to another embodiment of the present application

FIG. 5 is a schematic structural diagram of an embodiment of an adjustment assembly of the present application;

FIG. 6 is a schematic structural view of yet another embodiment of an antenna assembly of the present application;

FIG. 7 is a schematic structural view of yet another embodiment of an antenna assembly of the present application;

FIG. 8 is a schematic structural view of yet another embodiment of an antenna assembly of the present application;

fig. 9 is a schematic partial structural view of yet another embodiment of an antenna assembly of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an embodiment of an electronic device of the present application, and fig. 2 is a schematic structural diagram of an embodiment of an antenna assembly of the present application. The application provides an antenna 100 and an electronic device 200 comprising the antenna. The particular electronic apparatus 200 may be any one of a number of electronic devices including, but not limited to, cellular phones, smart phones, other wireless communication devices, personal digital assistants, audio players, other media players, music recorders, video recorders, cameras, other media recorders, radios, medical devices, calculators, programmable remote controllers, pagers, netbook computers, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), moving picture experts group (MPEG-1 or MPEG-2) audio layer 3(MP3) players, portable medical devices, and digital cameras and combinations thereof. The electronic device 200 includes the antenna 100 described in any of the embodiments below.

Specifically, in the present application, the antenna 100 includes a printed circuit board 10, a ground plane 20 disposed on the printed circuit board 10, and a metal frame 40 surrounding the printed circuit board 10.

Specifically, in one embodiment, the printed circuit board 10 is a carrier for carrying circuits and components in the electronic device 200. The printed circuit board 10 is provided with a feed source 14, and the feed source 14 is used for connecting the metal frame and is used as an input and output point of signals.

The ground plane 20 is a ground system of the electronic device 200 and is disposed on the printed circuit board 10. Specifically, the ground plane 20 is a metal layer disposed on the printed circuit board 10, and a first ground point 22 is disposed on the ground plane 20 for grounding the metal frame 40.

The metal frame 40 surrounds the printed circuit board 10. Specifically, the metal frame 40 is a part of the frame of the electronic device 200, and forms a side portion of the electronic device 200. Specifically, the metal frame 40 is continuously disposed to form a closed frame around the printed circuit board 10. In the present application, a gap 50 is disposed between the metal frame 40 and the ground plane 20 at an interval, and the gap 50 serves as a radiation space of the antenna. It is understood that the gap 50 may be a real space, and the space may also be filled by the edge of the printed circuit board 10, as long as the metal frame 40 is spaced from the ground plane 20 to provide a space for the radiation of the antenna, which is not limited in particular.

Specifically, the metal frame 40 includes a first connection point 42 and a second connection point 44, the first connection point 42 is connected to the feed 14, the second connection point 44 is grounded through the first ground point 22, and a portion of the metal frame 40 from the first connection point 42 to the second connection point 44 forms a first antenna radiator. The feed 14, the first connection point 42, the second connection point 44 and the first ground point 22 are connected in sequence to form a loop, so that the portion of the metal frame 40 from the first connection point 22 to the second connection point 24 constitutes the first antenna radiator. The first antenna radiator transmits or receives signals using the slot 50 between the metal bezel 40 and the ground plane 20 as a radiation space.

Specifically, in an embodiment, the metal frame 40 is a rectangular parallelepiped and includes a first side 41, a second side 43, a third side 45, and a fourth side 47 connected end to end in sequence, where the first side 41 and the third side 45 are set as long sides, and the second side 43 and the fourth side 47 are set as short sides.

Optionally, in an embodiment, the first connection point 42 and the second connection point 44 are located on the first side edge 41 and the third side edge 45, respectively, which are opposite to each other. The first antenna radiator surrounds the top end of the electronic device 200 or surrounds the bottom end of the electronic device 200, and fig. 2 shows a schematic view of the first antenna radiator surrounding the top end of the electronic device 200.

In another embodiment, as shown in fig. 3, fig. 3 is a schematic structural diagram of an antenna assembly of the present application in another embodiment. The first and

second connection points

42a and 44a are located on the first and

second sides

41 and 43, respectively, adjacent to each other. I.e. the first antenna radiator covers one of the corners of the electronic device 200.

In yet another embodiment, the first connection point 42 and the second connection point 44 are located on the same side of the metal frame 40. Specifically, the first antenna radiator may be located on any one of the side edges of the metal frame 40. It will be appreciated that the first antenna radiator is arranged on the first side 41 or the third side 45, and the length of the first antenna radiator can be made longer in comparison to the embodiment in which the first antenna radiator is arranged on the second side 43 or the fourth side 47, so as to cover a wider range of frequency bands.

Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of another embodiment of the antenna assembly of the present application, and fig. 5 is a schematic structural diagram of an embodiment of the adjusting assembly of the present application. In one embodiment, the antenna 100 further includes an adjusting component 90, and the adjusting component 90 includes a switch 60 and a tuning element 70, the switch 60 is connected between the first ground point 22 and the second connection point 44, and the tuning element 70 is selectively connected between the metal frame 40 and the ground plane 20 through the switch, so that the length of the first antenna radiator is changed to cover different frequency bands.

Referring to fig. 6, fig. 6 is a schematic structural view of another embodiment of an antenna assembly of the present application. In this embodiment, the metal frame 40 further includes a third connection point 46, the ground plane 20 is provided with a second ground point 24, the third connection point 46 is located between the first connection point 42 and the second connection point 44, and a switch 60a is disposed between the third connection point 46 and the third ground point 26. With this structure, the portion of the metal bezel 40 from the first connection point 42 to the third connection point 46 forms the second antenna radiator. With this structure, the length from the third connection point 46 to the first connection point 42 in the metal bezel 40 is greater than the length from the third connection point 46 to the second connection point 44. The length of the second antenna radiator is smaller than that of the first antenna radiator, and the frequency band generated by the second antenna radiator is higher than that generated by the first antenna radiator. It is understood that only one of the first and second antenna radiators operates. Specifically, when the switch 60a connected to the third connection point 46 is turned on, the second antenna radiator is operated, and the first antenna radiator is not operated. Conversely, when the switch 60a connected to the third connection point 46 is in the non-conductive state, the second antenna radiator does not operate, and the first antenna radiator operates.

Optionally, in an embodiment, a tuning element 70 may be disposed between the third connection point 46 and the third grounding point 26, and the tuning element 70 is selectively connected between the metal frame 40 and the third grounding point 26 through a switch 60a to cover different frequency bands.

Optionally, the tuning element 70 is at least one of a capacitor 72 or an inductor 74. The specific capacitor 72 may be a fixed capacitor or a variable capacitor. In an embodiment where both the capacitor 72 and the inductor 74 are provided, the capacitor 72 and the inductor 74 are provided in parallel, as shown in fig. 5.

The above arrangement of the third connection point 46, the arrangement of the

switches

60 or 60a in the first and second antenna radiators, and the arrangement of the tuning element 70 all provide that the antenna 100 has a greater variety of lengths that can be switched to cover a wider low frequency range. Specifically, the whole low frequency range is the working frequency band between 698-. Thereby realizing the medium and high frequency bands and the low frequency bands for the work of the coverage antenna.

Referring to fig. 7, optionally, in an embodiment, the slot 50 between the metal bezel 40 and the ground plane 20 includes a first slot 52 and a second slot 54, where the first slot 52 is a gap between the first antenna radiator and the end surface of the ground plane 20, and the remaining portion of the slot 50 is the second slot 54. In this embodiment, at least a portion of the width a of the first slot 52 is greater than the width b of the second slot 54, thereby providing a larger radiating space for the first antenna radiator and/or the second antenna radiator.

Further, optionally, in an embodiment, the ground plane 20 forms a clearance 16 near an end of the first antenna radiator. In this embodiment, the clearance area 16 is elongated such that the width a of the first slot 52 is partially greater than the width b of the second slot 54. It is understood that the clearance area 16 is an area where no metal-bearing elements are disposed. As long as the metal frame 40 and the ground plane 20 are spaced apart from each other to provide a space for radiation of the antenna 100, which is not particularly limited.

Referring to fig. 8, in a further embodiment, a clearance area 16a is formed at the periphery of a portion of the ground plane 20 near the end of the first antenna radiator, and the clearance area 16a includes a body portion 162 and a bent portion 164 extending from one end or both ends of the body portion 162 toward the length direction of the third side as shown in fig. 8. The above structure makes the ratio of the width of the entire first slot 52 to the width of the second slot 54 larger, and the maximum width of the entire first slot 52 is larger than the width of the second slot 54, thereby providing a larger radiation space for the first antenna radiator and/or the second antenna radiator.

Referring to fig. 9, fig. 9 is a schematic partial structural view of another embodiment of an antenna assembly of the present application. In this embodiment, the antenna 100 further includes a bottom plate 80 connected to the metal frame 40, and the metal frame 40 and the bottom plate 80 form a receiving cavity 82 for receiving the printed circuit board 10. Optionally, in an embodiment, the bottom plate 80 is made of an insulating material, and may be made of a glass material or a plastic material, which is not particularly limited.

In other embodiments, the bottom plate 80 may be made of a metal material, and only the gap 50 between the first antenna radiator and the ground plane 20 and the corresponding position of the clearance area 12 are hollowed, and then the hollowed position is filled with an insulating material, such as plastic, resin, etc., to avoid shielding signals.

A gap is arranged between the metal frame 40 and the ground plane 20, the feed source 14 is arranged on the printed circuit board 10, the first connection point 42 and the second connection point 44 are arranged on the metal frame 40, and the first grounding point 22 is arranged on the ground plane 20. The first connection point 42 is connected to the feed 14 and the second connection point 44 is grounded via a first ground point 42, so that a portion of the metal frame 40 becomes a first antenna radiator for covering the low frequency band and the medium and high frequency bands are covered by the high order mode of the first antenna radiator. In addition, in the present application, the third connection point 46 may be disposed on the metal frame 40 and grounded to the ground plane 20, so that another portion of the metal frame 40 forms a second antenna radiator, thereby covering a wider range of operating frequency bands. With the above structure, the metal frame 40 is a complete closed loop without any break, so that the electronic device 200 using the antenna 100 has better strength and better appearance. Meanwhile, compared with a structure that a broken seam is arranged on a metal frame in the prior art, the structure design is low in processing cost, and the problem that parts on two sides of the broken seam are mutually coupled due to the fact that the broken seam is too small in accommodating does not exist, so that the performance of the antenna is better.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. An antenna assembly, comprising:

the printed circuit board is provided with a feed source;

the metal frame surrounds the periphery of the printed circuit board, a gap is arranged between the metal frame and the ground plane at an interval, the metal frame comprises a first connecting point and a second connecting point, the feed source is connected with the first connecting point, the second connecting point is grounded through the first grounding point, a part of the metal frame from the first connecting point to the second connecting point forms a first antenna radiator, and the first antenna radiator transmits or receives signals by utilizing the gap; the metal frame is continuously arranged to form a closed frame around the printed circuit board;

the metal frame is further provided with a third connection point, a second grounding point is arranged on the grounding surface, and the third connection point is grounded through the second grounding point, so that a part of the metal frame from the first connection point to the third connection point forms a second antenna radiator;

the third connection point is located between the first connection point and the second connection point, and the length from the third connection point to the first connection point is greater than the length from the third connection point to the second connection point, so that the length of the second antenna radiator is less than the length of the first antenna radiator;

the metal frame is cuboid and comprises a first side edge, a second side edge, a third side edge and a fourth side edge which are sequentially connected end to end, wherein the first side edge and the third side edge are oppositely arranged to be long edges, and the second side edge and the fourth side edge are oppositely arranged to be short edges; the first connection point and the second connection point are respectively located on the first side edge and the third side edge, so that the first antenna radiator and the second antenna radiator are both located on the top of the metal frame;

the slot comprises a first slot and a second slot, wherein the first slot is a gap between the first antenna radiator and the end surface of the ground plane; the ground plane is close to the periphery of the part of the end part of the first antenna radiator to form a clearance area, and the clearance area comprises a body part and a bending part which extends from one end or two ends of the body part to the length direction of the third side edge at the same time, so that the width of the whole first gap is larger than that of the second gap.

2. The antenna assembly of claim 1, further comprising a switch connected between the first ground point and the second connection point and a tuning element selectively interposed between the metal bezel and the ground plane through the switch to cover different frequency bands.

3. The antenna assembly of claim 2, wherein the tuning element is at least one of a capacitor or an inductor.

4. The antenna assembly as claimed in claim 1, wherein the first and second antenna radiators are configured to generate an operating band between 698 and 960Mhz, and the high order modes of the first and second antenna radiators are configured to generate an operating band between 1710 and 2690 Mhz.

5. The antenna assembly of claim 1, further comprising a base plate connected to the metal bezel, the metal bezel and the base plate forming a receiving cavity for receiving the printed circuit board, wherein the base plate is made of an insulating material.

6. An electronic device, comprising an antenna assembly according to any one of claims 1-5.