CN107742777B - Antenna device capable of expanding antenna bandwidth and mobile terminal - Google Patents

Antenna device capable of expanding antenna bandwidth and mobile terminal Download PDF

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Publication number
CN107742777B
CN107742777B CN201710945349.6A CN201710945349A CN107742777B CN 107742777 B CN107742777 B CN 107742777B CN 201710945349 A CN201710945349 A CN 201710945349A CN 107742777 B CN107742777 B CN 107742777B
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antenna
trace
expanding
flexible circuit
circuit board
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CN201710945349.6A
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CN107742777A (en
Inventor
陈卫
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JRD Communication Shenzhen Ltd
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JRD Communication Shenzhen Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/36Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/22Supports; Mounting means by structural association with other equipment or articles
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/50Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Abstract

The invention discloses an antenna device capable of expanding antenna bandwidth, which comprises a shell, a main board and an antenna support, wherein the main board and the antenna support are respectively arranged on two opposite surfaces of the shell; the antenna wiring comprises a connecting end, a high-frequency wiring and a low-frequency wiring, the high-frequency wiring and the low-frequency wiring extend from two ends of the connecting end, the main board is provided with an antenna feed pin, a first grounding pin and a second grounding pin, and the antenna feed pin and the first grounding pin are respectively and electrically connected to the connecting end; and the first flexible circuit board is provided with a parasitic antenna electrically connected with the second grounding pin, and the parasitic antenna is used for coupling the low-frequency wiring. The invention discloses an antenna device capable of expanding antenna bandwidth, which can increase the bandwidth of the antenna by adding a parasitic antenna coupled with the antenna in the antenna device.

Description

Antenna device capable of expanding antenna bandwidth and mobile terminal
Technical Field
The present invention relates to the field of antennas, and in particular, to an antenna apparatus and a mobile terminal capable of extending an antenna bandwidth.
Background
At present, mobile terminals such as mobile phones tend to be ultra-thin, so that the internal space is continuously reduced, but the functions of the mobile phones are increasingly powerful, and more various devices are necessarily arranged in the mobile phones. Various antennas are arranged in the mobile phone, so that on one hand, the longest length of the antenna is ensured as much as possible when the antenna is designed, but the antenna inevitably occupies more internal space; on the other hand, if the length of the antenna is reduced, the resonant frequency band of the antenna is inevitably narrower, and good communication experience cannot be brought.
Disclosure of Invention
The present invention is directed to overcome the deficiencies of the prior art, and to provide an antenna device for extending the frequency band of an antenna by providing a parasitic antenna.
In order to achieve the purpose, the invention adopts the following technical scheme:
an antenna device capable of expanding antenna bandwidth comprises a shell, a main board and an antenna support which are respectively arranged on two opposite surfaces of the shell, an antenna wire arranged on the antenna support, and a first flexible circuit board arranged on the main board, wherein the first flexible circuit board is positioned on the surface of the main board close to the antenna wire;
the antenna wiring comprises a connecting end, a high-frequency wiring and a low-frequency wiring, the high-frequency wiring and the low-frequency wiring extend from two ends of the connecting end, the main board is provided with an antenna feed pin, a first grounding pin and a second grounding pin, and the antenna feed pin and the first grounding pin are respectively and electrically connected to the connecting end;
and a parasitic antenna electrically connected with the second grounding pin is arranged on the first flexible circuit board and used for coupling the low-frequency wiring.
Preferably, the antenna support includes a top surface and a side surface adjacent to the top surface, the high-frequency trace is located on a side of the connection end away from the parasitic antenna, and the high-frequency trace is located on the top surface;
the low-frequency wiring comprises a first wiring extending from one side of the connecting end close to the parasitic antenna and a second wiring bent from the tail end of the first wiring, the first wiring is located on the top surface, the second wiring comprises a first branch and a second branch bent from the first branch, the first branch is located on the side surface, and the second branch is located on the top surface.
Preferably, the low-frequency trace further includes a conductive roundabout portion, the roundabout portion includes a first end and a second end respectively located on the top surface and the side surface, the first end is connected to the first trace, and the second end is connected to the first branch.
Preferably, the second trace extends along a direction toward the connection end, and the second branch and the first trace are arranged at intervals to form a gap.
Preferably, the width of the slit is 0.6 mm.
Preferably, the parasitic antenna is located between the connection end and the first end in a projection on the first trace.
Preferably, the antenna support is provided with a first through hole on the top surface, a second through hole on the shell, and the connecting end sequentially penetrates through the first through hole and the second through hole and is respectively abutted against the antenna feed pin and the first grounding pin.
Preferably, the antenna trace is a second flexible circuit board, and the second flexible circuit board is adhered to the antenna bracket.
The invention also provides a mobile terminal which comprises a loudspeaker and any one of the antenna devices capable of expanding the antenna bandwidth, wherein the loudspeaker is arranged on the mainboard, the first flexible circuit board is covered on the loudspeaker, and the first flexible circuit board is provided with a wiring layer electrically connected with the loudspeaker.
Preferably, the routing layer and the parasitic antenna are located on both sides of the speaker, respectively.
The invention discloses an antenna device capable of expanding antenna bandwidth and a mobile terminal.
Drawings
Fig. 1 is an exploded view of an antenna device according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an antenna trace according to an embodiment of the invention.
Fig. 3 is a schematic view of an antenna stand according to an embodiment of the invention.
Fig. 4 is a diagram illustrating a state of the motherboard, the antenna trace, and the first flexible circuit board according to an embodiment of the invention.
Fig. 5 is an expanded state diagram of the first flexible circuit board according to the embodiment of the invention.
Fig. 6 is a schematic diagram of a combination of a main board and a speaker according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and fig. 2, the antenna device capable of expanding antenna bandwidth according to the embodiment of the present invention includes a housing 10, a main board 20, an antenna support 30, an antenna trace 40, and a first flexible circuit board 50, where the main board 20 and the antenna support 30 are respectively disposed on two opposite surfaces of the housing 10, the antenna trace is disposed on the antenna support 30, and the first flexible circuit board 50 is disposed on a surface of the main board 20 close to the antenna trace 40. The antenna trace 40 includes a connection end 41, a high frequency trace 42 extending from two ends of the connection end 41, and a low frequency trace 43, the main board 20 is provided with an antenna feeding pin 21, a first grounding pin 22, and a second grounding pin 23, and the antenna feeding pin 21 and the first grounding pin 22 are electrically connected to different positions of the connection end 41 respectively. As shown in fig. 5, a parasitic antenna 51 is further disposed on the first flexible circuit board 50, the parasitic antenna 51 is electrically connected to the second grounding pin 23, and the parasitic antenna 51 is used for coupling the low frequency trace 43 to extend the signal frequency band of the low frequency antenna.
Specifically, the main board 20 and the antenna trace 40 are respectively located at two opposite sides of the housing 10, so that the antenna trace 40 is far away from the metal device on the main board 20, and the antenna signal is enhanced. Further, the antenna bracket 30 is provided with a first through hole 31, the housing 10 is provided with a second through hole 11, the connection end 41 of the antenna trace 40 sequentially passes through the first through hole 31 and the second through hole 11, and the end of the connection end 41 is bent and then is respectively abutted against the antenna feed pin 21 and the first ground pin 22, so as to ensure stable connection between the main board 20 and the antenna trace 40.
Specifically, as shown in fig. 3, the antenna stand 30 includes a top surface 32 and a side surface 33 adjacent to the top surface 32. The high frequency trace 42 is located on the top surface 32, and the high frequency trace 42 is located on a side of the connection terminal 41 away from the parasitic antenna 51, i.e. the high frequency antenna 42 extends toward a side of the housing 10. Wherein the high frequency wire 42 is a loop of wire surrounding a screw hole on the top surface 32, and as a preferred embodiment, the length of the high frequency wire 42 is 13 mm. The first through hole 11 is located on the top surface 32 in the area facing the connection terminal 41.
Further, the low frequency trace 43 includes a first trace 431 extending from a side of the connection end 41 close to the parasitic antenna 51 and a second trace 432 bent from a terminal of the first trace 431, and the second trace 432 includes a first branch 432a and a second branch 432b bent from the first branch 432 a. The first trace 431 is located on the top surface 32, the first branch 432a is located on the side surface 33, and the second branch 432b is located on the top surface 32. On one hand, the low-frequency wiring 43 is bent and arranged on the top surface 32 and the side surface 33 at the same time, so that the antenna structure is more compact, and the occupied space of the antenna is reduced; on the other hand, the electrical length of the antenna is prolonged, and the frequency band of the antenna can be further expanded. The parasitic antenna 51 is coupled to the first trace 431 to extend the signal band of the low frequency antenna.
Further, the low frequency trace 43 further includes a conductive roundabout portion 433, the roundabout portion 433 includes a first end and a second end respectively located on the top surface 32 and the side surface 33, the first end is electrically connected to the first trace 431, and the second end is electrically connected to the first branch 432 a. In order to prevent the roundabout portion 433 from being coupled with the parasitic antenna 51, a projection of the parasitic antenna 51 on the first trace 431 should be located between the roundabout portion 433 and the connection end 41, so that the parasitic antenna 51 can be coupled with the first trace 431.
Further, the second trace 432 extends entirely along the direction toward the connection end 41, and the first branch 432a and the first trace 431 are disposed at an interval to form a gap. The slot is used for coupling out the intermediate frequency band of the antenna signal, and the receiving efficiency of the antenna signal is adjusted by adjusting the width of the slot. As a preferred embodiment, the width of the slit is 0.6 mm.
As a preferred embodiment, the antenna trace 40 is a second flexible circuit board, and the antenna trace 40 is preferably attached to the antenna bracket 30 by an attaching method. Of course, in other embodiments, the antenna trace 40 may be a metal trace formed directly on the antenna bracket 30, such as an LDS trace.
The mobile terminal of this embodiment has the antenna apparatus with expandable antenna bandwidth, and the mobile terminal includes, but is not limited to, a smart phone and a tablet computer. As shown in fig. 6, the mobile terminal further includes a speaker 60 connected to the main board 20, and the speaker 60 is located on the surface of the main board 20 close to the antenna trace 40. The first flexible circuit board 50 is further provided with a wiring layer 52 electrically connected with the speaker 60, the first flexible circuit board 50 covers the back of the speaker 60, and the wiring layer 52 and the parasitic antenna 51 are respectively positioned at two sides of the speaker 60, so that the wiring layer 52 can be prevented from generating interference on the parasitic antenna 51. The main board 20 is provided with an anode elastic sheet 24 and a cathode elastic sheet 24, the speaker 60 body is provided with a connecting elastic sheet 61, and the wiring layer 52 is electrically connected with the anode elastic sheet 24, the cathode elastic sheet 25 and the connecting elastic sheet 61 respectively.
The front of the speaker 60 of the above embodiment faces the display panel of the mobile terminal, i.e., sounds through the display panel side. In addition, the speaker 60 is located at the middle position of the mobile terminal, and the distance from the speaker 60 to the bottom end of the mobile terminal is 6 mm.
The invention discloses an antenna device capable of expanding antenna bandwidth and a mobile terminal.
Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents, and that such changes and modifications are intended to be within the scope of the invention.

Claims (9)

1. The antenna device capable of expanding the antenna bandwidth is characterized by comprising a shell (10), a main board (20) and an antenna bracket (30) which are respectively arranged on two opposite surfaces of the shell (10), an antenna wire (40) arranged on the antenna bracket (30) and a first flexible circuit board (50) of a loudspeaker (60) arranged on the main board (20), wherein the first flexible circuit board (50) is positioned on the surface, close to the antenna wire (40), of the main board (20);
the antenna wiring (40) comprises a connecting end (41), a high-frequency wiring (42) and a low-frequency wiring (43) which extend from two ends of the connecting end (41), the mainboard (20) is provided with an antenna feed pin (21), a first grounding pin (22) and a second grounding pin (23), and the antenna feed pin (21) and the first grounding pin (22) are respectively and electrically connected to the connecting end (41);
a parasitic antenna (51) electrically connected with the second grounding pin (23) is arranged on the first flexible circuit board (50), and the parasitic antenna (51) is used for coupling the low-frequency routing (43);
the antenna support (30) comprises a top surface (32) and a side surface (33) adjacent to the top surface (32), the high-frequency wiring (42) is positioned on one side of the connecting end (41) far away from the parasitic antenna (51), and the high-frequency wiring (42) is positioned on the top surface (32);
the low-frequency routing (43) comprises a first routing (431) extending from one side of the connecting end (41) close to the parasitic antenna (51) and a second routing (432) bent from the tail end of the first routing (431), the first routing (431) is located on the top surface (32), the second routing (432) comprises a first branch (432 a) and a second branch (432 b) bent from the first branch (432 a), the first branch (432 a) is located on the side surface (33), and the second branch (432 b) is located on the top surface (32).
2. The antenna apparatus capable of expanding antenna bandwidth according to claim 1, wherein the low frequency trace (43) further comprises a conductive detour (433), and the detour (433) comprises a first end and a second end respectively located on the top surface (32) and the side surface (33), the first end is connected to the first trace (431), and the second end is connected to the first stub (432 a).
3. The antenna apparatus capable of expanding antenna bandwidth as recited in claim 2, wherein the second trace (432) extends along a direction toward the connection end (41), and the second branch (432 b) is spaced apart from the first trace (431) to form a gap (44).
4. The antenna apparatus capable of expanding antenna bandwidth as claimed in claim 3, wherein the width of the slot (44) is 0.6 mm.
5. The antenna apparatus capable of expanding antenna bandwidth according to claim 2, wherein the parasitic antenna (51) is located between the connection end (41) and the first end in projection on the first trace (431).
6. The antenna device capable of expanding antenna bandwidth according to claim 1, wherein a first through hole (31) is disposed on the top surface (32) of the antenna bracket (30), a second through hole (11) is disposed on the housing (10), and the connection end (41) sequentially passes through the first through hole (31) and the second through hole (11) and abuts against the antenna feed pin (21) and the first ground pin (22).
7. The antenna apparatus capable of expanding antenna bandwidth according to any one of claims 1-6, wherein the antenna trace (40) is a second flexible circuit board, and the second flexible circuit board is adhered to the antenna bracket (30).
8. A mobile terminal comprising a speaker (60) and the antenna device with expandable antenna bandwidth of any one of claims 1 to 7, wherein the speaker (60) is disposed on the main board (20), the first flexible circuit board (50) is disposed on the speaker (60), and the first flexible circuit board (50) is provided with a wiring layer (52) electrically connected to the speaker (60).
9. Mobile terminal according to claim 8, characterized in that the routing layer (52) and the parasitic antenna (51) are located on both sides of the speaker (60), respectively.
CN201710945349.6A 2017-10-12 2017-10-12 Antenna device capable of expanding antenna bandwidth and mobile terminal Active CN107742777B (en)

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Application Number Priority Date Filing Date Title
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CN107742777B true CN107742777B (en) 2020-04-10

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WO2019232802A1 (en) * 2018-06-08 2019-12-12 海能达通信股份有限公司 Device integrating speaker and antenna, and communication device
CN108963428B (en) * 2018-06-13 2020-08-21 瑞声精密制造科技(常州)有限公司 Antenna system and mobile terminal
CN109037908B (en) * 2018-07-05 2020-11-27 瑞声精密制造科技(常州)有限公司 Antenna system of mobile terminal and mobile terminal
CN109037902A (en) 2018-07-27 2018-12-18 北京小米移动软件有限公司 The front housing and electronic equipment of electronic equipment
CN109244682B (en) * 2018-08-30 2023-12-19 深圳市信维通信股份有限公司 Antenna capable of increasing bandwidth and mobile terminal adopting same
CN109860977B (en) * 2018-12-03 2020-12-25 惠州Tcl移动通信有限公司 Mobile communication terminal and antenna structure thereof
CN109586022A (en) * 2018-12-21 2019-04-05 惠州Tcl移动通信有限公司 Antenna structure and electronic equipment
CN110011679A (en) * 2019-03-29 2019-07-12 努比亚技术有限公司 Terminal antenna extends out the method, apparatus to DOCK, mobile terminal and storage medium
CN110138391B (en) * 2019-05-20 2021-03-02 维沃移动通信有限公司 Mobile terminal
CN111030723B (en) * 2019-11-29 2021-09-28 惠州Tcl移动通信有限公司 Communication terminal with composite antenna

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