WO2017162136A1

WO2017162136A1 - Antenna apparatus, metal housing and mobile terminal

Info

Publication number: WO2017162136A1
Application number: PCT/CN2017/077476
Authority: WO
Inventors: 胡莎莎
Original assignee: 广东欧珀移动通信有限公司
Priority date: 2016-03-21
Filing date: 2017-03-21
Publication date: 2017-09-28
Also published as: CN105655701B; CN105655701A

Abstract

Disclosed in the present invention is an antenna apparatus, comprising a radio frequency transceiving circuit, a matching circuit and a radiator; the matching circuit is electrically connected between the radio frequency transceiving circuit and the radiator. The radiator is the metal housing of a mobile terminal, said metal housing comprising a first radiating part, a second radiating part, a first insulating strip and a first connecting segment; the first insulating strip and the first connecting segment are positioned between the first radiating part and the second radiating part; the first connecting segment is electrically connected between the first radiating part and the second radiating part; and the first connecting segment is electrically connected to the matching circuit. Also disclosed are a metal housing and a mobile terminal. The radiator of the antenna apparatus of the present invention is the metal housing of a mobile terminal, increasing radiation efficiency of said antenna apparatus.

Description

Antenna device, metal casing and mobile terminal

Technical field

The present invention relates to the field of antenna technologies, and in particular, to an antenna device and a mobile terminal to which the antenna device is applied.

Background technique

With the development of technology and the increasing demands of users on the signal of electronic products, many mobile terminals with antennas such as mobile phones on the market currently use metal casings to ensure the intensity of use, satisfy the texture and enhance the user experience. sense. It is well known that metal is a signal shielding material. In order to avoid the effect of metal casing signal shielding on the efficiency of the antenna, the design of the housing is usually combined with metal and non-metal, so that the antenna structure is located in the non-metal area, and the non-metal area is usually disposed at both ends of the mobile terminal. Located outside the shield display area, the non-metal area is internally provided with a circuit board on which electronic components and signal transceiver modules are disposed. The antenna of the mobile terminal is usually disposed in a non-metallic area to transmit and receive signals through the non-metal area. In the conventional structure, the design of the radiator of the antenna is limited, resulting in a low radiation efficiency of the antenna.

Summary of the invention

The technical problem to be solved by the present invention is to provide an antenna device in which the radiator of the antenna device is a metal casing of the mobile terminal, so that the radiation efficiency of the antenna device is improved.

Furthermore, the present invention also provides a mobile terminal including the antenna device.

In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:

In one aspect, the present invention provides an antenna apparatus including: a radio frequency transceiver circuit, a matching circuit, and a radiator, the matching circuit being electrically connected between the radio frequency transceiver circuit and the radiator, the radiator being a mobile a metal casing of the terminal, the metal casing including a first radiating portion, a second radiating portion, a first insulating tape, and a first connecting portion, wherein the first insulating tape and the first connecting portion are located in the first radiating portion Between the first radiating portion and the second radiating portion, the first insulating portion is spaced apart by the first insulating strip, and the first connecting portion is electrically connected to the first radiating portion The first connecting segment is electrically connected to the matching circuit between the second radiating portion.

In another aspect, the present invention provides a metal casing for use in a mobile terminal, the metal casing and The radio frequency transceiver circuit in the mobile terminal is electrically connected and serves as a radiator of the antenna device, and the metal casing includes a first radiating portion, a second radiating portion, a first insulating tape and a first connecting portion, the first insulating tape and the The first connecting portion is located between the first radiating portion and the second radiating portion, and the first radiating portion and the second radiating portion are separated by the first insulating strip, the first a connecting segment electrically connected between the first radiating portion and the second radiating portion, wherein the first connecting segment is connected to the radio frequency transceiver circuit

In still another aspect, the present invention provides a mobile terminal comprising the aforementioned metal casing.

Compared with the prior art, the present invention has the following beneficial effects:

The radiator of the antenna device in the embodiment of the present invention is disposed on the metal casing of the mobile terminal, and the metal casing is partitioned into at least two radiating portions (first radiation) through the insulating tape (the first insulating tape and the second insulating tape) a second portion, a second radiating portion, and a third radiating portion, wherein the at least two radiating portions are electrically connected by the connecting portion (the first connecting portion and the second connecting portion), and are electrically connected to the matching circuit of the antenna device through the connecting portion, Feeding. The radiator of the antenna device provided by the invention utilizes the structure of the metal casing of the mobile terminal, has a large radiation area, and does not need to additionally design an antenna radiator, which not only improves the radiation efficiency of the antenna device, but also simplifies the overall structure of the mobile terminal. It is beneficial to reduce the cost of mobile terminals.

DRAWINGS

In order to more clearly illustrate the technical solutions of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, which are common in the art. For the skilled person, other drawings can be obtained as shown in these drawings without any creative work.

FIG. 1 is a schematic structural diagram of a radiator of an antenna device according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a radiator of an antenna device according to another embodiment of the present invention.

FIG. 3 is a schematic diagram of current distribution of a radiator of an antenna device according to an embodiment of the present invention.

4 is a schematic diagram showing the overall structure of a radiator of an antenna device, a main board in a mobile terminal, and a matching circuit and a radio frequency transceiver circuit disposed on the main board.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The invention relates to an antenna device, which is applied inside a mobile terminal, and the mobile terminal can be a smart phone or a tablet computer or the like. The mobile terminal includes a display screen and a metal casing. The metal casing is usually used as a back cover of the mobile terminal, and houses the battery and the main board inside. The top and/or bottom of the display screen of the mobile terminal is usually provided with a non-display area, and electronic components such as a camera module, an earpiece, a Bluetooth module, a fingerprint recognition module, and the like are disposed inside the non-display area. The motherboard of the mobile terminal is also set in the non-display area.

Referring to FIG. 1 and FIG. 2 and FIG. 4, the antenna device provided by the present invention includes a radio frequency transceiver circuit 10, a matching circuit 20, and a radiator 30. The radio frequency transceiver circuit 10 and the matching circuit 20 are disposed on the main board 40 in the mobile terminal. Or set on a circuit board connected to the main board 40. The matching circuit 20 is electrically connected between the radio frequency transceiver circuit 10 and the radiator 30 to implement a function of signal transceiving. The radiator 30 is a metal casing 30 of the mobile terminal. That is, the present invention uses the metal casing 30 as a radiator of the antenna device, and the same component has two functions.

Referring to FIG. 1 and FIG. 2 together, the metal casing 30 includes a first radiating portion 32, a second radiating portion 34, a first insulating strip 36 and a first connecting portion 38, the first insulating strip 36 and the The first connecting portion 38 is located between the first radiating portion 32 and the second radiating portion 34, and the first radiating portion 32 and the second radiating portion 34 pass between the first insulating strip 36 The first connecting section 38 is electrically connected between the first radiating portion 32 and the second radiating portion 34, and the first connecting portion 38 is electrically connected to the matching circuit 20.

Specifically, the metal casing 30 is a one-piece metal sheet structure, and a slit is formed in the metal casing 30, and the metal casing 30 is partitioned by the slit to form the first radiating portion 32 and the second radiating portion 34. An insulating material is filled in the slit to form a first insulating tape 36. The material of the first insulating tape 36 is a non-signal shielding material, and the first insulating tape 36 can also serve as a clearance area on the signal transceiving path of other antennas inside the mobile terminal. The first connecting portion 38 is a conductive material (which may be made of a metal material), and the first connecting portion 38 is electrically connected not only between the first radiating portion 32 and the second radiating portion 34 but also as a feeding point to the matching circuit 20 . The first connecting section 38 can also serve as a return point for the antenna device, i.e., to achieve the grounding function of the antenna device radiator 30. In one embodiment, the first connecting portion 38 passes through the metal dome and the main board The matching circuit 20 on 40 is electrically connected.

In one embodiment, as shown in FIG. 1 , the metal casing 30 includes a first long side L1 , a second long side L2 , and a pair of short sides S , which are oppositely disposed and connected. Between the first long side L1 and the second long side L2, the first insulating tape 36 extends from the first long side L1 toward the second long side L2, that is, the first insulating tape 36 The first connecting section 38 is formed between the first insulating strip 36 and the second long side L2 without extending to the second long side L2.

In another embodiment, as shown in FIG. 2, the first insulating strip 36 extends from the first long side L1 to the second long side L2, and the first connecting section 38 spans the first An insulating tape 36. That is, the first radiating portion 32 and the second radiating portion 34 are completely separated by the first insulating tape 36, and the first connecting portion 38 is a conductive sheet independent of the metal casing 30, and the first insulating tape 36 is formed first during the manufacturing process. Then, the first connecting section 38 is fabricated. The first connecting section 38 can be located at any position of the first insulating tape 36.

In another embodiment of the present invention, the metal casing 30 further includes a third radiating portion 35, the antenna device further includes a second insulating tape 37 and a second connecting portion 39, the second insulating tape 37 and the first Two connecting segments 39 are located between the second radiating portion 34 and the third radiating portion 35, and the second radiating portion 34 and the third radiating portion 35 are spaced apart by the second insulating tape 37 The second connecting section 39 is electrically connected between the second radiating portion 34 and the third radiating portion 35, and the second connecting portion 39 is electrically connected to the matching circuit 20.

In one embodiment, the first insulating tape 36 extends from the first long side L1 toward the second long side L2, and a space is formed between the first insulating tape 36 and the second long side L2. a first connecting section 38, the second insulating strip 37 extends from the second long side L2 toward the first long side L1, and the second insulating strip 37 forms a gap with the first long side L1 The second connecting section 39.

In another embodiment, the first insulating strip 36 and the second insulating strip 37 each extend the first long side L1 to the second long side L2, and the first connecting section 38 spans the The first insulating strip 36 is disposed, and the second connecting portion 39 spans the second insulating strip 37.

Further, the first radiating portion 32, the second radiating portion 34, the third radiating portion 35, the first connecting portion 38, and the second connecting portion 39 are all made of a metal material. The materials of the first radiating portion 32, the second radiating portion 34, the third radiating portion 35, the first connecting portion 38, and the second connecting portion 39 may be the same or different.

In one embodiment, the first insulating tape 36 and the second insulating tape 37 are parallel to each other.

The radiator of the antenna device in the embodiment of the present invention is disposed on the metal casing of the mobile terminal, and the metal casing is partitioned into at least two radiating portions by the insulating tape (the first insulating tape 36 and the second insulating tape 37) a radiating portion 32, a second radiating portion 34 and a third radiating portion 35), at least two radiating portions are electrically connected by a connecting portion (the first connecting portion 38 and the second connecting portion 39), and through the connecting portion and the antenna The matching circuit 20 of the device is electrically connected to perform feeding. The radiator of the antenna device provided by the invention utilizes the structure of the metal casing of the mobile terminal, has a large radiation area, and does not need to additionally design an antenna radiator, which not only improves the radiation efficiency of the antenna device, but also simplifies the overall structure of the mobile terminal. It is beneficial to reduce the cost of mobile terminals.

Please refer to FIG. 3. FIG. 3 is a schematic diagram showing the current distribution of the radiator of the antenna device. In the figure, the first connecting section 38 is connected to the matching circuit to become a feeding point, such that the current direction on the first radiating portion 32 flows from the second long side L2 to the first long side L1, and the current direction on the second radiating portion 34 is From the first insulating tape 36 toward the direction perpendicular to the first insulating tape 36.

The embodiments of the present invention have been described in detail above, and the principles and implementations of the present invention are described in detail herein. The description of the above embodiments is only for helping to understand the method of the present invention and its core ideas; It should be understood by those skilled in the art that the present invention is not limited by the scope of the present invention.

Claims

An antenna device comprising a radio frequency transceiver circuit, a matching circuit and a radiator, wherein the matching circuit is electrically connected between the radio frequency transceiver circuit and the radiator, wherein the radiator is a metal casing of a mobile terminal The metal casing includes a first radiating portion, a second radiating portion, a first insulating tape, and a first connecting portion, and the first insulating tape and the first connecting portion are located at the first radiating portion and the first portion Between the two radiating portions, the first radiating portion and the second radiating portion are spaced apart by the first insulating strip, and the first connecting portion is electrically connected to the first radiating portion and the first portion Between the two radiating portions, the first connecting portion is electrically connected to the matching circuit.
The antenna device according to claim 1, wherein said metal casing comprises a first long side, a second long side and a pair of short sides which are oppositely disposed, said pair of short sides being oppositely disposed and connected to said Between the first long side and the second long side, the first insulating tape extends from the first long side toward the second long side, and the first insulating tape and the second long side The first connecting section is formed between.
The antenna device according to claim 1, wherein said metal casing comprises a first long side, a second long side and a pair of short sides which are oppositely disposed, said pair of short sides being oppositely disposed and connected to said Between the first long side and the second long side, the first insulating tape extends from the first long side to the second long side, and the first connecting section spans the first insulating tape .
The antenna device according to claim 1, wherein said metal casing further comprises a third radiating portion, said antenna device further comprising a second insulating tape and said second connecting portion, said second insulating tape and said a second connecting section is located between the second radiating portion and the third radiating portion, and the second radiating portion and the third radiating portion are spaced apart by the second insulating strip, the second The connecting section is electrically connected between the second radiating portion and the third radiating portion, and the second connecting portion is electrically connected to the matching circuit.
The antenna device according to claim 4, wherein said metal casing comprises a first long side, a second long side and a pair of short sides which are oppositely disposed, said pair of short sides being oppositely disposed and connected to said Between the first long side and the second long side, the first insulating tape extends from the first long side toward the second long side, and the first insulating tape and the second long side Forming the first connecting segment, the second insulating strip extending from the second long side toward the first long side, and forming the first between the second insulating strip and the first long side Two connection segments.
The antenna device according to claim 4, wherein said metal casing comprises a first long side, a second long side and a pair of short sides which are oppositely disposed, said pair of short sides being oppositely disposed and connected to said Between the first long side and the second long side, the first insulating strip and the second insulating strip each extend the first long side to the second long side, and the first connecting section is horizontal Along the first insulating tape, the second connecting segment spans the second insulating tape.
The antenna device according to claim 4, wherein said first radiating portion, said second radiating portion, said third radiating portion, said first connecting portion and said second connecting portion are both Made of metal.
The antenna device according to claim 4, wherein said first insulating tape and said second insulating tape are parallel to each other.
The antenna device according to claim 1, wherein the material of the first insulating tape is a non-signal shielding material.
A metal casing is applied to a mobile terminal, wherein the metal casing is electrically connected to a radio frequency transceiver circuit in the mobile terminal and serves as a radiator of the antenna device, and the metal casing includes a first radiating portion and a second radiating portion. a first insulating tape and the first connecting segment, the first insulating tape and the first connecting segment being located between the first radiating portion and the second radiating portion, the first radiating portion and the The second radiating portions are spaced apart by the first insulating strip, the first connecting portion is electrically connected between the first radiating portion and the second radiating portion, the first connecting portion and the RF transceiver circuit connection.
The metal casing according to claim 10, wherein said metal casing comprises a first long side, a second long side and a pair of short sides which are oppositely disposed, said pair of short sides being oppositely disposed and connected to said Between the first long side and the second long side, the first insulating tape extends from the first long side toward the second long side, and the first insulating tape and the second long side The first connecting section is formed between.
The metal casing according to claim 10, wherein said metal casing comprises a first long side, a second long side and a pair of short sides which are oppositely disposed, said pair of short sides being oppositely disposed and connected to said Between the first long side and the second long side, the first insulating tape extends from the first long side to the second long side, and the first connecting section spans the first insulating tape .
A metal casing according to claim 10, wherein said metal casing further comprises a third radiating portion, said antenna device further comprising a second insulating tape and said second connecting portion, said second insulating tape and said a second connecting section between the second radiating portion and the third radiating portion, the second radiation The second radiating portion is spaced apart by the second insulating strip, and the second connecting portion is electrically connected between the second radiating portion and the third radiating portion, the second connection The segment is electrically connected to the matching circuit.
A metal casing according to claim 13, wherein said metal casing comprises a first long side, a second long side and a pair of short sides which are oppositely disposed, said pair of short sides being oppositely disposed and connected to said Between the first long side and the second long side, the first insulating tape extends from the first long side toward the second long side, and the first insulating tape and the second long side Forming the first connecting segment, the second insulating strip extending from the second long side toward the first long side, and forming the first between the second insulating strip and the first long side Two connection segments.
A metal casing according to claim 13, wherein said metal casing comprises a first long side, a second long side and a pair of short sides which are oppositely disposed, said pair of short sides being oppositely disposed and connected to said Between the first long side and the second long side, the first insulating strip and the second insulating strip each extend the first long side to the second long side, and the first connecting section is horizontal Along the first insulating tape, the second connecting segment spans the second insulating tape.
The metal casing according to claim 13, wherein said first insulating tape and said second insulating tape are parallel to each other.
The metal casing according to any one of claims 10 to 16, wherein the first radiating portion, the second radiating portion, the third radiating portion, the first connecting portion, and the first The two connecting sections are made of metal.
A metal casing according to any of claims 10-16, wherein said first connecting section is a return point of said antenna device.
A metal casing according to claim 18, wherein said first connecting section is electrically connected to a matching circuit on a main board in said mobile terminal via a metal dome, said matching circuit being electrically connected to said radio frequency transceiver circuit And the first connecting segment.
A mobile terminal characterized by comprising the metal casing according to any one of claims 10 to 19.