WO2012167515A1

WO2012167515A1 - Protective case for mobile terminal and mobile terminal

Info

Publication number: WO2012167515A1
Application number: PCT/CN2011/079362
Authority: WO
Inventors: 周闯柱; 杨喜; 石青松; 陈琼
Original assignee: 刘建
Priority date: 2011-06-09
Filing date: 2011-09-06
Publication date: 2012-12-13
Also published as: CN202261415U

Abstract

The present invention provides a protective case for a mobile terminal. The protective case comprises an antenna, and a radio frequency transmission line connected to the antenna. The present invention further provides a mobile terminal comprising the protective case and a switch circuit. A radio frequency transceiver circuit of the mobile terminal is electrically connected to an input end of the switch circuit. A first output port of the switch circuit is electrically connected to a built-in antenna matching network. A second output port is electrically connected to the radio frequency transmission line of the protective case. The switch circuit turns on any output port according to the control. The present invention enhances the antenna performance.

Description

Mobile terminal protection cover and mobile terminal

Technical field

The present invention relates to mobile terminal technologies, and in particular, to a mobile terminal and a mobile terminal protection sleeve. Background technique

With the rapid development of wireless communication, the demand for mobile terminal data services is also growing. The use of mobile terminals for Internet access, video, e-mail, and online TV viewing has become an indispensable part of people's daily lives. However, in the process of space transmission, due to occlusion of buildings, undulations of terrain, and other obstacles, reflected waves, scattered waves, etc. are generated in the propagation path. Therefore, wireless signals may cause multipath fading effects, causing errors. The code rate is greatly increased, which seriously affects the reliability of the communication link. In addition, when the electromagnetic wave propagates in the wireless channel, there is a twist in the polarization direction, and the polarization direction of the receiving antenna does not match the polarization direction of the receiving antenna. Therefore, in addition to multipath fading caused by multipath propagation during wireless transmission, there is also polarization mismatch fading. Because of the existence of the above two kinds of fading, under the complicated network environment, the data transmission rate is greatly affected, which brings great obstacles to the fluency of users.

In order to overcome such multipath fading and polarization mismatch fading and improve system performance, terminal equipment manufacturers are striving to improve the antenna performance of mobile terminal equipment. However, currentlyadays, the large-screen and full-keyboard mobile terminals are popular on the market. The display screens and keyboards of the two forms of mobile terminals need to cover most of the main board area, and then the structure and circuit components are subtracted. Position, the space left for the antenna is very limited, and there is not much room for improvement in antenna performance. Most of the antennas in the existing mobile terminals are built in the main board. The implementation scheme has the following disadvantages: 1. The antenna occupies limited space, and the antenna transceiver performance is greatly discounted. 2. When the user uses the antenna, the antenna is close to the human body, and the antenna is also used. The performance is deteriorated. In addition, the external antenna technology currently used not only increases the space occupied by the mobile terminal, but also has the disadvantage of being inconvenient to carry. Summary of the invention

The object of the present invention is to provide a mobile terminal and a mobile terminal protection cover, which can compensate for the deterioration of the antenna performance caused by the limited space of the antenna, and improve the convenience of carrying. In order to solve the above problems, the present invention provides a mobile terminal protection cover, the protection cover comprising an antenna and a radio frequency transmission line connected to the antenna.

The protective cover is foldable, and the area where the antenna is located when the protective cover is deployed is away from the protected mobile terminal.

The protective cover is a non-metallic material.

The portion of the protective cover other than the area where the antenna is located is made of a metal material, and the area where the antenna is located is a non-metallic material.

The antenna is a monopole antenna, a planar inverted F antenna (PIFA) or an inverted F antenna (IFA). The present invention also provides a mobile terminal, comprising the protective cover as described above, the mobile terminal further comprising a baseband circuit, a radio frequency transceiver circuit connected to the baseband circuit, an internal antenna, and a built-in antenna matching connected to the built-in antenna a network, further comprising a switch circuit, the radio frequency transceiver circuit is electrically connected to an input end of the switch circuit, a first output port of the switch circuit is electrically connected to the built-in antenna matching network, and the switch circuit The second output port is electrically connected to the RF transmission line of the protective sleeve, and the switch circuit turns on any one of the first output port and the second output port according to the control.

The switch circuit is a single pole double throw switch.

The single pole double throw switch is a single pole logic switch or an adaptive single pole double throw switch.

The built-in antenna is a monopole antenna, a planar inverted F antenna (PIFA) or an inverted F antenna (IFA).

The built-in antenna matching network is a π-type, double-L-type or Τ-type network.

Compared with the prior art, the mobile terminal protection sleeve and the mobile terminal provided by the invention have enhanced the transmission and reception performance of the mobile terminal, and at the same time, improve the convenience of carrying, and do not increase the space occupied by the mobile terminal.

BRIEF abstract

1 is a block diagram showing the operation of a mobile terminal according to the present invention;

2 is a flow chart of designing a mobile terminal of the present invention; 3 is a schematic view of a mobile terminal with a protective cover of the present invention.

Preferred embodiment of the invention

In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be arbitrarily combined with each other.

The invention provides a protective cover for a mobile terminal, wherein the protective cover comprises an antenna and a radio frequency transmission line connected to the antenna.

The protective cover is foldable, and the antenna area is deployed away from the protected mobile terminal when the protective cover is deployed.

The protective cover is made of a non-metallic material, or the protective cover is divided into a metal material except for the antenna area, and the antenna area is a non-metal material.

Wherein, the antenna is in the form of a monopole, a planar inverted F antenna (PIFA) or an inverted F antenna (IFA).

The present invention provides a mobile terminal with a protective cover, the mobile terminal further comprising a baseband circuit, a radio frequency transceiver circuit connected to the baseband circuit, an internal antenna, and a built-in antenna matching network connected to the built-in antenna, wherein a switch circuit, the RF transceiver circuit is electrically connected to an input end of the switch circuit, an output port of the switch circuit is electrically connected to the built-in antenna matching network, and an output port is electrically connected to the protective cover An RF transmission line, the switch circuit turns on any of the output ports according to the control.

Wherein, the switch circuit is a single pole double throw switch. Other switches can also be used.

1 is a block diagram of a mobile terminal of the present invention. The built-in antenna is electrically connected to one output port of the single-pole double-throw switch through the built-in antenna matching network, and the other output port of the single-pole double-throw switch is connected to the antenna in the protective cover through the RF transmission line in the protective cover of the mobile terminal, single-pole double-throw The input end of the switch is electrically connected to the RF transceiver circuit; the single-pole double-throw switch and the built-in antenna or mobile terminal cover The internal antenna is electrically connected to complete signal transmission and reception; wherein, when the output port connecting the single-pole double-throw switch and the antenna in the protective cover is closed, the internal antenna is disconnected from the single-pole double-throw switch, and the built-in antenna stops working, and the protection The antenna in the set works, and the receiving and receiving performance of the mobile terminal is enhanced.

Figure 2 is a mobile terminal design method with a protective cover, including:

Step A: designing an internal antenna on the main board in the mobile terminal housing;

Step B: designing an internal antenna matching network on the main board in the mobile terminal housing, and electrically connecting with the built-in antenna;

Step C: A single-pole double-throw switch is disposed on the main board in the mobile terminal housing, and the built-in antenna matching network is electrically connected to an output port of the single-pole double-throw switch;

Step D: designing a radio frequency transceiver circuit on the main board in the mobile terminal housing, and electrically connecting with the input port of the single-pole double-throw switch; Step E, designing a baseband circuit on the main board in the mobile terminal housing, Electrically connecting to the radio frequency transceiver circuit;

Step F: design a foldable protective cover that matches the mobile terminal and can protect the mobile terminal, and can be folded to protect the mobile terminal when the mobile terminal is not in use;

Step G: designing an antenna in the protective sleeve to be electrically connected to another output port of the single-pole double-throw switch;

Step H: The single-pole double-throw switch is placed on an output port connected to the antenna in the protective cover, and the antenna in the protective cover is electrically connected to the radio frequency transceiver circuit, and the transmitting and receiving performance of the mobile terminal is increased.

3 is a schematic diagram of a specific embodiment of a mobile terminal with a protective cover according to the present invention, including:

A built-in antenna 3 is designed on the top right side of the main board 2 in the mobile terminal housing 1. The built-in antenna 3 may be in the form of a monopole, a PIFA (Planar Inverted F antenna), an IFA (Inverted F antenna), etc. Form

An internal antenna matching network 4 is disposed below the internal antenna 3, and the built-in antenna matching network 4 is of a π type. At the same time, it can also be another type of matching network such as double L type, Τ type, etc. The antenna 3 is electrically connected;

A single-pole double-throw switch 5 is disposed on the left side of the main board, and an output port 6 of the single-pole double-throw switch 5 is electrically connected to the matching network 4 of the built-in antenna, and the single-pole double-throw switch 5 is a single-pole logic switch. The control switch button is used to turn on the output port, and can also be an adaptive single-pole double-throw switch. When one output port is connected, the other output port is automatically disconnected;

An RF transceiver circuit 7 is disposed under the matching network 4 of the internal antenna, and is electrically connected to the input terminal 8 of the single-pole double-throw switch 5;

A baseband circuit 9 is disposed under the RF transceiver circuit 7 and electrically connected to the RF transceiver circuit 7;

Designing a foldable protective cover 10 that matches the mobile terminal and can protect the mobile terminal, and can be folded to protect the display screen and the keyboard of the mobile terminal when the mobile terminal is not in use, and can be deployed during use, so that The antenna is far away from the mobile terminal; the position of the antenna shown in Figure 3 is only an example, and it can be placed in other positions on the protective cover as needed.

An antenna 11 is disposed at the bottom of the protective cover 10. The antenna 11 in the protective cover is in the form of a monopole, and may also be in the form of PIFA, IFA, etc., and the protective cover 10 may be all non-metallic materials. Using a metal material for the other parts of the protective cover except the antenna area;

An RF transmission line 12 is connected to the feeding end of the antenna 11 in the protective cover 10;

When the mobile terminal uses the protective cover 10, the other end of the radio frequency transmission line 12 is electrically connected to the other output port 13 of the single-pole double-throw switch 5, and the internal antenna 3 is disconnected from the radio frequency transceiver circuit 7 at this time. The antenna 11 in the protective cover 10 is electrically connected to the radio frequency transceiver circuit 7 and operates.

As can be seen from the description of the above method and device, since the present invention ingeniously sets a built-in antenna in the protective cover of the mobile terminal, the antenna in the protective cover is electrically connected to the RF transceiver circuit by controlling the single-pole double-throw switch, and The available area of the antenna is increased by several times relative to the built-in antenna, and the distance between the antenna and the human body is increased during use, which greatly provides the antenna performance, increases the ability of the mobile terminal to transmit and receive signals, and simplifies the inconvenience of the external antenna. Sexuality increases user selectivity and improves user experience satisfaction. The above is only a preferred embodiment of the present invention, and it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those of ordinary skill in the art It is to be understood that a number of modifications and refinements may be made without departing from the principles of the invention, and such modifications and refinements are also considered to be within the scope of the invention.

Industrial applicability

Compared with the prior art, the invention enhances the transceiving performance of the mobile terminal, and at the same time improves the convenience of carrying, and does not increase the space occupied by the mobile terminal.

Claims

Claim

1. A mobile terminal protection cover comprising:

An antenna and a radio frequency transmission line connected to the antenna.

2. The protective case according to claim 1, wherein the protective cover is foldable, and the area where the antenna is located when the protective cover is deployed is away from the protected mobile terminal.

3. The protective case according to claim 1, wherein the protective cover is a non-metallic material.

The protective cover according to claim 1, wherein a portion of the protective cover other than the area where the antenna is located is a metal material, and a region where the antenna is located is a non-metal material.

The protective cover according to claim 1, wherein the antenna is a monopole antenna, a planar inverted F antenna (PIFA) or an inverted F antenna (IFA).

A mobile terminal, comprising the protective cover according to any one of claims 1 to 5, the mobile terminal further comprising a baseband circuit, a radio frequency transceiver circuit connected to the baseband circuit, an internal antenna, and a built-in antenna matching network connected to the internal antenna, wherein the mobile terminal further includes a switch circuit, the radio frequency transceiver circuit is electrically connected to an input end of the switch circuit, and the first output port of the switch circuit is electrically connected to The built-in antenna matching network, the second output port of the switch circuit is electrically connected to the RF transmission line of the protective sleeve, and the switch circuit turns on any one of the first output port and the second output port according to the control Output port.

The mobile terminal of claim 6, wherein the switch circuit is a single pole double throw switch.

The mobile terminal according to claim 7, wherein the single-pole double-throw switch is a single-pole logic switch or an adaptive single-pole double-throw switch.

The mobile terminal according to claim 6, wherein the built-in antenna is a monopole antenna, a planar inverted F antenna (PIFA) or an inverted F antenna (IFA).

The mobile terminal according to claim 6, wherein the built-in antenna matching network is a π-type, double-L-type or Τ-type network.