WO2019105213A1

WO2019105213A1 - Antenna system and mobile terminal

Info

Publication number: WO2019105213A1
Application number: PCT/CN2018/115012
Authority: WO
Inventors: 简宪静; 黄奂衢; 王义金
Original assignee: 维沃移动通信有限公司
Priority date: 2017-11-30
Filing date: 2018-11-12
Publication date: 2019-06-06
Also published as: CN107895838A

Abstract

Provided by the present disclosure are an antenna system and a mobile terminal. The antenna system is applied in a mobile terminal and comprises a first power splitter, a frequency selection unit, a first antenna, a second antenna, and a third antenna, the first antenna, the second antenna and the third antenna being located at one end of the mobile terminal; the first antenna is connected to a first transceiving end of the power splitter, and the second antenna is connected to a second transceiving end of the power splitter, while a third transceiving end of the power splitter is connected to a first transceiving end of the frequency selection unit, the third antenna being connected to a second transceiving end of the frequency selection unit; the first antenna and the second antenna cover high frequency and intermediate frequency, and the third antenna covers low frequency.

Description

Antenna system and mobile terminal

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201711240029.7 filed on Jan.

Technical field

The present disclosure relates to the field of antenna technologies, and in particular, to an antenna system and a mobile terminal.

Background technique

With the development of science and technology, communication technology has developed rapidly and made great progress. With the improvement of communication technology, the popularity of intelligent electronic products has increased to an unprecedented height. More and more intelligent terminals or mobile terminals have become people. An integral part of life, such as smartphones, smart TVs and computers.

As mobile terminals gradually become an indispensable part of people's lives, the performance of mobile terminals needs to be improved accordingly, especially for the basic communication functions of mobile terminals, and the performance of the antenna as a key component of wireless communication is directly Affect the quality of communication and user experience. However, in the mobile terminal in the related art, due to factors such as the size of the whole machine, the antenna operating frequency, the antenna layout, the antenna type, the structure near the antenna, the environment, and the related materials, the radiation pattern of the antenna is often strong in some directions. However, the other directions are weaker. Therefore, there is a risk of poor wireless communication in some directions, and even a wireless communication blind zone is formed, resulting in low antenna efficiency, which in turn affects the user's wireless experience.

Summary of the invention

In a first aspect, an embodiment of the present disclosure provides an antenna system, which is applied to a mobile terminal, where the antenna system includes a first power splitter, a frequency selecting unit, a first antenna, a second antenna, and a third antenna, where the An antenna, the second antenna, and the third antenna are located at one end of the mobile terminal, the first antenna is connected to a first transceiver end of the first power splitter, the second antenna is a second transceiver end of the first power splitter is connected, a third transceiver end of the first power splitter is connected to a first transceiver end of the frequency selection unit, and the third antenna and the frequency selection unit are The two transceivers are connected, the first antenna and the second antenna cover a medium-high frequency band, and the third antenna covers a low frequency band.

In a second aspect, an embodiment of the present disclosure further provides a mobile terminal, where the mobile terminal includes the antenna system described above.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings used in the description of the embodiments of the present disclosure will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present disclosure. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

FIG. 1 is a perspective view of a mobile terminal according to an embodiment of the present disclosure;

2 is a schematic structural diagram of an antenna system of the mobile terminal shown in FIG. 1;

FIG. 3 is a schematic structural diagram of an antenna system of a mobile terminal according to another embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of an antenna system of a mobile terminal according to another embodiment of the present disclosure.

Detailed ways

The technical solutions in the embodiments of the present disclosure are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present disclosure. It is obvious that the described embodiments are a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without departing from the inventive scope are the scope of the disclosure.

Please refer to FIG. 1. FIG. 1 is a perspective view of a mobile terminal according to an embodiment of the present disclosure. As shown in FIG. 1 , the mobile terminal 100 of the embodiment of the present disclosure includes a display screen 11 , a middle frame 12 , and a rear case 13 . The middle frame 12 carries the display screen 11 and the rear case 13 , and the display screen 11 The rear case 13 and the rear case 13 together form a receiving cavity, and the main board and other components of the mobile terminal are received in the receiving cavity. The mobile terminal 100 further includes a display area 101 and a peripheral area 102 surrounding the display area 101. The display area 101 is used to implement the display function, the touch function, and the like of the mobile terminal 100.

Please refer to FIG. 2 at the same time. FIG. 2 is a schematic structural diagram of an antenna system of the mobile terminal shown in FIG. 1. As shown in FIG. 2, the mobile terminal 100 includes an antenna system 14 and a common ground terminal 15, which is connected to the common ground terminal 15. The common ground end 15 may be a common ground end formed by the main board of the mobile terminal 100, the middle frame 12 or the rear case 13 or the like.

The antenna system 14 includes a first antenna 141, a second antenna 142, a third antenna 143, a first power divider 144, a frequency selection unit 145, and a signal transceiver 146. The first antenna 141, the second antenna 142, and the third antenna 143 are located at one end of the mobile terminal 100 and located at a top end of the mobile terminal 100, and the third antenna 143 is located at the first end. Between the antenna 141 and the second antenna 142.

In this embodiment, the first antenna 141, the second antenna 142, and the third antenna 143 are located at the top end of the mobile terminal 100, that is, the antenna system 14 is located at the top of the mobile terminal 100. For example, but not limited to, in other embodiments, the antenna system 14 may be located at the bottom or side of the mobile terminal 100, or at the top of the mobile terminal 100, An antenna system 14 is provided at the bottom end and the side edges, respectively, and is not limited thereto.

The first antenna 141, the second antenna 142, and the third antenna 143 are located at one end of the mobile terminal 100, and may be referred to as the first antenna 141, the second antenna 142, and the The resonant arm of the third antenna 143 is located at one end of the mobile terminal 100; the third antenna 143 is located between the first antenna 141 and the second antenna 142, and may refer to the resonance of the third antenna 143. The arm is located between the resonant arm of the first antenna 141 and the resonant arm of the second antenna 142. The resonant arms of the first antenna 141, the second antenna 142, and the third antenna 143 may be formed by a part of the middle frame 12 or the rear case 13, or may be separately provided.

The first antenna 141 is connected to the first transceiver end of the first power splitter 144, and the second antenna 142 is connected to the second transceiver end of the first power splitter 144. The third antenna 143 is connected. Connected to the first transceiver end of the frequency selection unit 145, the third transceiver end of the first power divider 144 is connected to the second transceiver end of the frequency selection unit 145, and is passed through the frequency selection unit 145. The signal transceiver 146 is connected, and the third transceiver end of the frequency selection unit 145 is connected to the signal transceiver end of the signal transceiver 146.

In this way, the single antenna in the related art is divided into the medium-high frequency first antenna and the second antenna in different spaces by the power splitter, so that the power of the single antenna is reduced, forming a double hot spot or multiple hot spots, so that the wireless power distribution is relatively uniform. Therefore, the SAR (Specific Absorption Rate) or the HAC (Hearing Aid Compatibility) value is reduced, so that the terminal product can expand the radiation pattern of the antenna of the mobile terminal through the setting of multiple hotspots through the corresponding test, and reduce the blind zone covered by the wireless signal. Improve the quality of wireless communication between different use locations and scenes. Furthermore, the first antenna and the second antenna are distributed at different positions, which can reduce the probability and degree of performance degradation caused by the two antennas being held by the user at the same time, thereby improving User wireless experience.

The antenna system 14 also includes a first radio frequency matching circuit 147, a second radio frequency matching circuit 148, and a third radio frequency matching circuit 149. The first radio frequency matching circuit 147 is connected between the first transceiver end of the first power divider 144 and the first antenna 141, and the second radio frequency matching circuit 148 is connected to the first power divider. Between the second transceiver end of the 144 and the second antenna 142, the third radio frequency matching circuit 149 is connected between the second transceiver end of the frequency selection unit 145 and the third antenna 143.

The frequency selection unit 145 includes a combiner or a filter, and the first transceiver end of the combiner or filter is a first transceiver end of the frequency selection unit 145, and the combiner or filter The second transceiver end is the second transceiver end of the frequency selection unit 145, and the third transceiver end of the combiner or filter is the third transceiver end of the frequency selection unit 145.

The first antenna 141 and the second antenna 142 cover a medium-high frequency band, and the third antenna 143 covers a low frequency band.

In this way, by setting the frequency selection unit, that is, setting the combiner or filter, separately setting a low-frequency third antenna, the limitation of the bandwidth bottleneck of the power divider can be effectively solved, so as to facilitate the antenna engineer to use the power divider. The antenna is designed, and the third antenna is further disposed between the first antenna and the second antenna, which can improve the isolation between the first antenna and the second antenna of the medium and high frequency and reduce the correlation coefficient (Envelope Correlation Coefficient, ECC) And reducing the mutual interference between the first antenna and the second antenna, ensuring the independence between the first antenna and the second antenna, and further helping to extend the pattern of the first antenna and the second antenna, thereby further Improve wireless communication performance and user experience. In addition, the low frequency antenna is independently disposed outside the power splitter, which can avoid the two ports of the power splitter, that is, the first transceiver end and the second transceiver end, which are unnecessary in order to reduce the impedance mismatch in the band between each other. The reflection loss and the undesired distortion of the echo at the third transceiver end, that is, the design that the low frequency is independently set outside the power divider, contributes to the antenna layout and the stack design of the whole machine, so that the overall wireless performance, and the user's wireless Experience, better product size and more competitive.

Please refer to FIG. 3, which is a schematic structural diagram of an antenna system of a mobile terminal according to another embodiment of the present disclosure. As shown in FIG. 3, the difference between the antenna system 24 shown in FIG. 3 and the antenna system 14 shown in FIG. 2 is that the antenna system 24 further includes a second power splitter 2410 and a fourth antenna 2411. And a fourth radio frequency matching circuit 2412.

The third antenna 243 of the antenna system 24 is connected to the first transceiver end of the second power divider 2410, and is connected to the frequency selection unit 245 of the antenna system 24 through the second power divider 2410, further The third radio frequency matching circuit 249 of the antenna system 24 is connected between the first transceiver end of the second power divider 2410 and the third antenna 243.

The fourth antenna 2411 is connected to the second transceiver end of the second power splitter 2410, and the fourth radio frequency matching circuit 2412 is connected to the fourth antenna 2411 and the second power splitter 2410. The third transceiver end of the second power splitter 2410 is connected to the second transceiver end of the frequency selection unit 245.

The fourth antenna 2411 is located at a side of the mobile terminal, that is, the resonant arm of the fourth antenna 2411 is located at a side of the mobile terminal, and the second antenna 242 of the antenna system 24 is located at the third antenna 243. Between the fourth antenna 2411 and the fourth antenna. The fourth antenna 2411 covers the low frequency band.

In the present embodiment, the second antenna 242 is located between the third antenna 243 and the fourth antenna 2411. However, the present invention is not limited thereto. In other embodiments, the fourth antenna The second antenna 241 of the mobile terminal may be located between the third antenna 243 and the fourth antenna 2411, and is not limited thereto.

In addition, please refer to FIG. 4 simultaneously. FIG. 4 is a schematic structural diagram of an antenna system of a mobile terminal according to another embodiment of the present disclosure. The antenna system of the mobile terminal shown in FIG. 4 includes the antenna system 14 shown in FIG. 2 and the antenna system 24 shown in FIG. 3, that is, the antenna system of the mobile terminal shown in FIG. 4 is an antenna. The system 14 and the antenna system 24 are formed, and the antenna system 14 and the antenna system 24 can be respectively located at both ends of the mobile terminal, thereby improving the communication performance of the mobile terminal.

In the embodiment of the present disclosure, the mobile terminal may be any one of, for example, a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), and a mobile internet device (Mobile Internet Device). A mobile terminal having at least a communication, a Global Positioning System (GPS), and a wireless connection function, such as a wearable device (MID) or a wearable device (Wearable Device).

An antenna system and a mobile terminal according to an embodiment of the present disclosure, the antenna system includes a first power splitter, a frequency selecting unit, a first antenna, a second antenna, and a third antenna, and the first antenna and the second antenna And the third antenna is located at one end of the mobile terminal, the first antenna is connected to a first transceiver end of the first power splitter, and the second antenna is connected to a second antenna of the first power splitter The third transceiver end of the first power splitter is connected to the first transceiver end of the frequency selection unit, and the third antenna is connected to the second transceiver end of the frequency selection unit. An antenna and the second antenna cover a medium-high frequency band, and the third antenna covers a low frequency band. In this way, using the power splitter, the first antenna and the second antenna covering the medium and high frequency are divided into two branches in different spaces, and a third antenna covering the low frequency is disposed between the first antenna and the second antenna, so that Extend the radiation pattern of the antenna system, reduce the blind area covered by the wireless signal, improve the wireless communication quality between different use positions and scenes, and effectively improve the isolation between the first antenna and the second antenna covering the medium and high frequency and reduce the packet correlation. Envelope Correlation Coefficient (ECC), and the antenna efficiency is thus improved. Moreover, since the physical positions of the two antennas are different, the probability that the wireless performance is greatly reduced when the user holds the antenna once when the user is hand-held can be reduced, thereby further expanding the pattern of the first antenna and the second antenna, thereby improving the wireless communication performance. In addition, the low frequency antenna is independently disposed outside the power splitter, which can avoid the two ports of the power splitter, that is, the first transceiver end and the second transceiver end, which are unnecessary in order to reduce the impedance mismatch in the band between each other. The reflection loss and the undesired distortion of the echo at the third transceiver end, that is, the design that the low frequency is independently set outside the power divider, contributes to the antenna layout and the stack design of the whole machine, improves the overall wireless performance, and the user's wireless Experience, and product size.

The above is only the specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the disclosure. It should be covered within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosure should be determined by the scope of the claims.

Claims

An antenna system is applied to a mobile terminal, including a first power splitter, a frequency selecting unit, a first antenna, a second antenna, and a third antenna, the first antenna, the second antenna, and the third antenna Located at one end of the mobile terminal, the first antenna is connected to a first transceiver end of the first power splitter, and the second antenna is connected to a second transceiver end of the first power splitter, a third transceiver end of the first power splitter is connected to the first transceiver end of the frequency selection unit, and the third antenna is connected to a second transceiver end of the frequency selection unit, the first antenna and the first The two antennas cover the middle and high frequency bands, and the third antenna covers the low frequency band.
The antenna system according to claim 1, comprising a first radio frequency matching circuit, wherein the first radio frequency matching circuit is connected between the first transceiver end of the first power splitter and the first antenna.
The antenna system of claim 1 , comprising a second radio frequency matching circuit, the second radio frequency matching circuit being coupled between the second transceiver end of the first power splitter and the second antenna.
The antenna system of claim 1 wherein said third antenna is located between said first antenna and said second antenna.
The antenna system according to claim 1, further comprising a second power splitter and a fourth antenna, wherein the third antenna is connected to a first transceiver end of the second power splitter, the fourth antenna and the fourth antenna The second transceiver of the second power splitter is connected, the fourth antenna covers the low frequency band, and the third transceiver of the second power splitter is connected to the second transceiver of the frequency selection unit.
The antenna system according to claim 5, comprising a third radio frequency matching circuit, wherein the third radio frequency matching circuit is connected between the first transceiver end of the second power splitter and the third antenna.
The antenna system according to claim 5, wherein said first antenna or said second antenna is located between said third antenna and said fourth antenna, said fourth antenna being located at a side of said mobile terminal side.
The antenna system according to claim 5, comprising a fourth radio frequency matching circuit, wherein the fourth radio frequency matching circuit is connected between the second transceiver end of the second power splitter and the fourth antenna.
The antenna system of claim 1 wherein said frequency selection unit comprises a combiner or filter.
A mobile terminal comprising the antenna system of any of claims 1-9.