WO2015085593A1

WO2015085593A1 - Communication terminal and antenna system thereof

Info

Publication number: WO2015085593A1
Application number: PCT/CN2013/089420
Authority: WO
Inventors: 李堃; 张学飞; 呼延思雷; 路宝
Original assignee: 华为终端有限公司
Priority date: 2013-12-13
Filing date: 2013-12-13
Publication date: 2015-06-18

Abstract

Disclosed in the present invention are a communication terminal and an antenna system thereof. The communication terminal comprises: a mainboard; and the antenna system connected with the mainboard; the antenna system comprises: a radio frequency signal transmitting and receiving terminal, a frequency dividing device connected with the radio frequency signal transmitting and receiving terminal, and a high-frequency antenna and a low-frequency antenna both connected with the frequency dividing device; the frequency dividing device is used for outputting a radio frequency signal, received by the radio frequency signal transmitting and receiving terminal, to the high-frequency antenna or the low-frequency antenna according to the frequency of the radio frequency signal; the high-frequency antenna is disposed on the middle area of a communication terminal end; the low-frequency antenna is disposed on the communication terminal end and comprises: a first wiring connected with a feeding end, a second wiring connected with a ground end and a third wiring connecting the first wiring with the second wiring, and the first wiring and the second wiring are oppositely disposed on the two sides of the high-frequency antenna. As a result, the radiance performance of the antenna system of the communication terminal can be improved on the basis of good adaptability to a trend of developing lightweight and thinned communication terminals.

Description

Communication terminal and antenna system thereof

Technical field

The present invention relates to the field of communications technologies, and in particular, to a communication terminal and an antenna system thereof. Background technique

With the development of thin and light mobile phones, the performance of OTA (Over The Ai r) for mobile phones is getting higher and higher, that is, the requirements for radiation performance of mobile phones are getting higher and higher. The mobile phone antenna in the prior art is usually a simple single-port multi-frequency PIFA antenna (planar invert ted-F antenna), an IFA antenna (invert ted-F antenna), or a monopole. antenna. In order to obtain better radiation performance, it is necessary to increase the distance between the antenna in the mobile phone to the PCB (Pr inted C i rcui tBoard, ie, the printed circuit board), that is, increase the antenna clearance space to improve the antenna radiation performance of the mobile phone.

However, if the distance between the antenna and the PCB is increased, the thickness of the mobile phone will be large, which is not conducive to the development of the thin and light mobile phone. Therefore, the existing antenna structure cannot improve the radiation performance of the mobile phone in adapting to the trend of thinning and thinning of the mobile phone. Summary of the invention

In order to solve the above technical problem, an embodiment of the present invention provides a communication terminal and an antenna system thereof, which can improve the radiation performance of the antenna system of the communication terminal in adapting to the trend of thinning and developing the communication terminal.

In order to solve the above problem, the embodiment of the present invention provides the following technical solutions: In the first aspect, a communication terminal is proposed, including:

a motherboard, the motherboard is provided with a feeding end and a ground end;

An antenna system connected to the main board, the antenna system comprising: a radio frequency signal transmitting and receiving end, a frequency dividing device connected to the radio frequency signal transmitting and receiving end, a high frequency antenna connected to the frequency dividing device, and a low frequency antenna connected to the frequency dividing device;

The frequency dividing device is configured to output the radio frequency signal to a high frequency antenna or a low frequency antenna according to a frequency of the radio frequency signal received by the transmitting and receiving ends of the radio frequency signal;

The high frequency antenna is disposed at a central portion of the end of the communication terminal;

The low frequency antenna is disposed at the end of the communication terminal, and includes: a first trace connected to the feed end, a second trace connected to the ground end, and the first trace and the second connection The third trace of the trace is disposed, and the first trace and the second trace are oppositely disposed on both sides of the high frequency antenna.

In a first possible implementation manner of the first aspect, when the signal received by the radio frequency signal transmitting and receiving ends is a high frequency signal, the frequency dividing device outputs the high frequency signal to the high frequency antenna; When the signal received by the radio frequency signal and the signal received by the receiving end is a low frequency signal, the frequency dividing device outputs the low frequency signal to the low frequency antenna.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, when the high frequency antenna and the low frequency antenna are located at the same end of the communication terminal, In a plane in which the main board is located, the third trace is located on a side of the high frequency antenna facing the main board or on a side of the high frequency antenna facing away from the main board.

In conjunction with the first aspect or any of the possible implementations of the first aspect above, in a third possible implementation, the shape of the first trace and/or the second trace is a curve.

In conjunction with the third possible implementation of the first aspect, in a fourth possible implementation, the curve is a serpentine line.

With reference to the second possible implementation of the first aspect, in a fifth possible implementation, the third trace is located on a side of the high frequency antenna facing away from the main board, and the housing of the communication terminal includes Gold When the frame is a frame, at least one of the first wire, the second wire, and the third wire is a component of the metal frame.

With reference to the first aspect, or any possible implementation manner of the foregoing first aspect, in the sixth possible implementation, the high frequency antenna is a monopole antenna, or a loop antenna, or an IFA antenna, or an IFA antenna and a parasitic a combined antenna of the antenna, or a coupled loop antenna;

The coupling loop antenna includes: a fourth trace connected to the feed end, the fourth trace is a U-shaped antenna; a fifth trace connected to the ground end, the fifth walk The line is a U-shaped antenna; and the fourth trace and the fifth trace are insulated from each other.

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation, the high frequency antenna and the low frequency antenna are directly soldered on the main board, or the high frequency antenna and The low frequency antennas are respectively connected to the main board through connecting members.

In a second aspect, an antenna system is provided, which is applied to a communication terminal, where the communication terminal includes a feed end and a ground end, and the antenna system includes:

Radio frequency signal transmitting and receiving end;

a frequency dividing device connected to the transmitting and receiving ends of the radio frequency signal;

a high frequency antenna connected to the frequency dividing device;

a low frequency antenna connected to the frequency dividing device, wherein the low frequency antenna is a loop antenna, comprising: a first trace connected to the feed end, a second trace connected to the ground end, and the connection a third trace of the trace and the second trace;

The frequency dividing device is configured to output the radio frequency signal to a high frequency antenna or a low frequency antenna according to a frequency of the radio frequency signal received by the transmitting and receiving ends of the radio frequency signal.

In a first possible implementation manner of the second aspect, when the signal received by the radio frequency signal transmitting and receiving ends is a high frequency signal, the frequency dividing device outputs the high frequency signal to the high frequency antenna; When the signal transmitted and received by the receiving end is a low frequency signal, the frequency dividing means outputs the low frequency signal to the low frequency antenna. In conjunction with the second aspect or the first possible implementation of the second aspect, in a second possible implementation, the shape of the first trace and/or the second trace is a curve.

In conjunction with the second possible implementation of the second aspect, in a third possible implementation, the curve is a serpentine line.

With reference to the second aspect, or any possible implementation manner of the foregoing second aspect, in the fourth possible implementation, the high frequency antenna is a monopole antenna, or a loop antenna, or an IFA antenna, or an IFA antenna and a parasitic antenna Combined antenna, or coupled loop antenna;

The coupling loop antenna includes: a fourth trace connected to the feed end, the fourth trace is a U-shaped antenna; a fifth trace connected to the ground end, the fifth trace is U-shaped An antenna; and the fourth trace and the fifth trace are insulated from each other. Compared with the prior art, the above technical solution has the following advantages:

The communication terminal and the antenna system thereof provided by the embodiments of the present invention can not only improve the low-frequency current distribution of the antenna in the communication terminal by using the loop antenna, but also balance the low-frequency current distribution of the antenna in the communication terminal to improve the low-frequency antenna of the communication terminal. The radiation performance can also increase the distance between the feeding end connected to the high frequency antenna and the high frequency antenna to the hand mold by arranging the high frequency antenna at an intermediate portion of the end of the communication terminal. The radiation performance of the high frequency antenna during use of the communication terminal is improved, and the radiation performance of the antenna system of the communication terminal is improved in the trend of adapting to the light and thin development of the communication terminal.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the present invention, Those of ordinary skill in the art, without creative efforts, Other drawings can be obtained from these figures.

1 is a schematic structural diagram of an antenna system according to an embodiment of the present invention;

2 is a schematic structural diagram of an antenna system according to an embodiment of the present invention;

3 is a schematic structural diagram of an antenna system according to another embodiment of the present invention; FIG. 4 is a schematic structural diagram of a communication terminal according to an embodiment of the present invention;

5 is a schematic structural diagram of a communication terminal according to another embodiment of the present invention; FIG. 6 is a schematic structural diagram of a communication terminal provided by a clock according to a third embodiment of the present invention;

7 is a schematic structural diagram of a communication terminal provided by a clock according to a fourth embodiment of the present invention;

8 is a schematic structural diagram of a communication terminal provided by a clock according to a fifth embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a low frequency antenna in a communication terminal according to any embodiment of the present invention; FIG.

FIG. 10 is a schematic structural diagram of an antenna system in a communication terminal according to another embodiment of the present invention; FIG.

11 to FIG. 12 are schematic diagrams showing the structure of an antenna system in a communication terminal according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION As described in the background section, the antenna structure of the prior art cannot improve the radiation performance of a mobile phone in adapting to the trend of thinning and developing mobile phones.

Since the main working state of the mobile phone is the call state, in the process of testing the radiation performance of the mobile phone, the head hand model is usually used to simulate the use scenario of the mobile phone, thereby testing the radiation performance of the mobile phone. The inventor's research found that the RF signal in the working frequency band of the mobile phone is divided into low frequency and high frequency. Among them, the low-frequency signal radiation of the mobile phone antenna mainly depends on the current generated by the antenna on the PCB, which is related to the current distribution on the mobile phone antenna and on the PCB. Current division of mobile phone antenna The balance of the cloth is more balanced, the better the performance of the low-end radiation of the mobile phone antenna, that is, the better the radiation performance of the low-frequency signal of the mobile phone antenna. On the contrary, the more uneven the current distribution of the mobile phone antenna, the worse the performance of the mobile phone antenna low-frequency radiation. That is, the radiation performance of the low frequency signal of the mobile phone antenna is worse.

The radiation performance of the high-frequency signal radiation of the mobile phone antenna is related to the feeding position of the mobile phone antenna and the distance of the hand antenna of the mobile phone antenna. The farther the mobile phone antenna's feeding position and the mobile phone antenna's walking distance are from the hand model's palm position, the better the performance of the mobile phone antenna's high-frequency radiation head model, that is, the better the radiation performance of the mobile phone antenna's high-frequency signal, and vice versa. The closer the electrical position and the antenna of the mobile phone antenna are to the palm of the hand model, the worse the performance of the high-end radiation of the mobile phone antenna is, that is, the poorer the radiation performance of the high-frequency signal of the mobile phone antenna.

However, the current distribution of the conventional antenna is unbalanced, which results in poor performance of the low-frequency head mode of the mobile phone antenna, and thus the radiation performance of the mobile phone antenna is poor.

The inventors further found that the feed point and the ground point of the loop antenna low-frequency mode are in the same direction, so that the excitation current generated on the PCB is relatively symmetrical. If the antenna in the mobile phone adopts the form of a loop antenna, the low-frequency current distribution in the antenna of the mobile phone can be changed, so that the low-frequency current distribution of the mobile phone antenna is relatively balanced, and the performance of the low-end radiation of the mobile phone antenna is improved, thereby improving the low-frequency signal of the mobile phone antenna. Radiation performance.

However, since the loop antenna is a half-wave folded oscillator, different wavelength modes are excited on different loop antennas, and the wavelength modes may include: a 1/2 wavelength mode, a 1 wavelength mode, a 3/2 wavelength mode, a 2 wavelength mode, and the like. Thereby, the high frequency mode of the loop antenna is more. The high-frequency current distribution of the control loop antenna needs to change the width and spacing of the traces at different positions of the loop antenna. If multiple modes are changed at the same time, it is difficult to adjust, and the position of the high-frequency current of the loop antenna on the antenna is difficult to control. Therefore, when performing the radiation performance test, the hand model can easily hold the sensitive area of the high-frequency radiation of the mobile phone antenna, and the mobile phone antenna height is lowered. The frequency of the hand model performance, thereby reducing the radiation performance of the high frequency signal of the mobile phone antenna.

Moreover, the conventional multi-frequency loop antenna requires a relatively large antenna area, and in order to improve the radiation performance, it is usually required to implement a high-cost antenna process such as LDS (laser direct molding technology), which limits the application scenario of the loop antenna.

Based on the above research, the embodiment of the present invention provides a communication terminal, including: a motherboard, the motherboard is provided with a feeding end and a ground end;

The frequency dividing device is configured to output the radio frequency signal to a high frequency antenna or a low frequency antenna according to a frequency of the radio frequency signal received by the radio frequency signal transmitting and receiving end; the high frequency antenna is disposed at a terminal end of the communication terminal. The low frequency antenna is disposed at the end of the communication terminal, and includes: a first trace connected to the feed end, a second trace connected to the ground end, and the first trace and the second connection The third trace of the trace is disposed, and the first trace and the second trace are oppositely disposed on both sides of the high frequency antenna.

Correspondingly, the embodiment of the present invention further provides an antenna system, which is applied to a communication terminal, where the communication terminal includes a feeding end and a ground end, and the antenna system includes:

The transmitting and receiving ends of the radio frequency signal;

a high frequency antenna connected to the frequency dividing device;

a low frequency antenna connected to the frequency dividing device, the low frequency antenna being a loop antenna, comprising: a first trace connected to the feed end; a second trace connected to the ground end; connecting the first trace and The third trace of the second trace;

The frequency dividing device is configured to output the radio frequency signal to a high frequency antenna or a low frequency antenna according to a frequency of the radio frequency signal received by the transmitting and receiving ends of the radio frequency signal. The communication terminal and the antenna system thereof provided by the embodiments of the present invention may be sent according to the radio frequency signal The frequency of the radio frequency signal received by the transmitting and receiving ends, and the frequency dividing device is used to divide the received radio frequency signal into a high frequency signal and a low frequency signal; then, the high frequency signal is transmitted to the high frequency antenna, and the low frequency signal is transmitted. For the low-frequency antenna, different antenna branches are used to radiate outward, so that when applied to the communication terminal, the low-frequency current distribution of the antenna in the communication terminal can be changed not only by using the loop antenna, but also the low-frequency current distribution of the antenna in the communication terminal is relatively balanced. Increasing the radiation performance of the low frequency antenna of the communication terminal, and increasing the feeding point of the high frequency antenna and the antenna to the left and right hand mode by arranging the high frequency antenna at an intermediate portion of the end of the communication terminal The distance of the communication terminal improves the radiation performance of the high-frequency antenna during use of the communication terminal, so that the communication terminal provided by the embodiment of the present invention can improve the radiation performance of the communication terminal antenna system in adapting to the trend of thinning and developing the communication terminal. .

The above described objects, features and advantages of the present invention will become more apparent from the aspects of the appended claims.

Specific details are set forth in the following description in order to provide a thorough understanding of the invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar promotion without departing from the scope of the present invention. The invention is therefore not limited by the specific embodiments disclosed below. An embodiment of the present invention provides an antenna system, which is applied to a communication terminal, where the communication terminal includes a feeding end and a ground end. As shown in FIG. 1, the antenna system includes: a radio frequency signal transmitting and receiving end 1; a frequency dividing device 2 connected to the radio frequency signal transmitting and receiving end 1; and a high frequency antenna 3 connected to the frequency dividing device 2 a low frequency antenna 4 connected to the frequency dividing device 2, the low frequency antenna 4 is a loop antenna, comprising: a first trace connected to the feed end; a second trace connected to the ground end; a third trace of the trace and the second trace; wherein the frequency dividing device 2 is configured to output the radio frequency signal to the high frequency according to the frequency of the radio frequency signal received by the radio frequency signal transmitting and receiving end 1 Antenna 3 or low Frequency antenna 4.

Specifically, when the signal received by the radio frequency signal transmitting and receiving end 1 is a high frequency signal, the frequency dividing device 2 outputs the high frequency signal to the high frequency antenna 3, and the high frequency antenna 3 is outwardly Radiation; when the signal received by the radio frequency signal transmitting and receiving end 1 is a low frequency signal, the frequency dividing device 2 outputs the frequency signal to the antenna 4, and through the antenna antenna 4 External radiation.

In an embodiment of the present invention, the high frequency signal is a radio frequency signal with a frequency greater than 1 GHz, and the low frequency signal is a radio frequency signal having a frequency of no more than 1 GHz, but the invention is not limited thereto, depending on the specific communication system. For example, in the GSM communication system, the high frequency signal is a radio frequency signal of not less than 1710 M Hz, and the low frequency signal is a radio frequency signal in a range of 824 M Hz - 960 M Hz.

It should be noted that, since the high frequency signal and the low frequency signal in the radio frequency signal are usually time-divisionally received, in one embodiment of the present invention, the frequency dividing device 2 may include: a single-pole double-throw RF switch and a control circuit connected to the single-pole double-throw RF switch; controlling the switching state of the single-pole double-throw RF switch by the control circuit to realize switching of the high-frequency signal and the low-frequency signal output state.

Specifically, in an embodiment of the present invention, when the radio frequency signal received by the frequency dividing device 2 is a high frequency signal, the control circuit controls the high frequency output end of the single pole double throw RF switch to be closed, and will receive The high frequency signal is output to the high frequency antenna 3 and radiated outward through the high frequency antenna 3; when the radio frequency signal received by the frequency dividing device 2 is a low frequency signal, the control circuit controls the single pole double throw The low frequency output of the RF switch is closed, and the received low frequency signal is output to the low frequency antenna 4 and radiated outward through the frequency antenna 4.

In another embodiment of the present invention, the frequency dividing device 2 may be a duplexer. In this embodiment, the control circuit is not required, and the duplexer can directly output the high frequency signal to the high frequency antenna. 3. The low frequency signal is output to the low frequency antenna 4. It should be noted that, in other embodiments of the present invention, The frequency dividing device 2 can also be other structures. The present invention is not limited thereto, as long as the frequency dividing device 2 can ensure that the high frequency signal received by the frequency dividing device 2 can be output to the high frequency antenna 3, The low frequency signal is output to the low frequency antenna 4.

In the antenna system provided by the embodiment of the present invention, the low frequency antenna 4 is a loop antenna, and the feeding point of the low frequency radiation mode of the loop antenna and the current direction of the ground point are consistent, so that the embodiment of the present invention provides When the antenna system is applied to the communication terminal, the current generated on the main board of the communication terminal is symmetrical, so that the distribution of the low-frequency current in the communication terminal is relatively balanced, thereby improving the radiation performance of the low-frequency antenna in the antenna system of the communication terminal.

Moreover, in the antenna system provided by the embodiment of the present invention, the high frequency signal is radiated outward through the high frequency antenna 3, and the low frequency signal is radiated outward through the low frequency antenna 4, that is, the high frequency signal and the low frequency signal use different antennas. The branch road radiates outward without using the same antenna branch to radiate outward, thereby solving the problem that the conventional multi-frequency antenna needs a relatively large antenna area, and in order to improve its radiation performance, a high-cost antenna such as LDS (laser direct forming technology) is adopted. The problem realized by the process has widened the application scenario of the loop antenna.

In an embodiment of the present invention, the low frequency antenna 4 includes: a first trace 401 connected to the feed end, a second trace 402 connected to the ground end, and a connection of the first trace 401 and the second A third trace 403 of the trace 402, wherein the first trace 401, the second trace 402, and the third trace 403 are straight lines, as shown in FIG.

Since the widths of the various communication terminals are not completely the same, some communication terminals have a large width, and some communication terminals have a small width. In order to meet the requirements of various communication terminals, in one embodiment of the present invention, The shape of the first trace 401 and the second trace 402 in the low frequency antenna 4 may be a curve, as shown in FIG. 3, to extend the length of the trace in the low frequency antenna 4, and increase the power of the low frequency antenna 4. The length ensures the signal receiving frequency of the low frequency antenna 4. In a specific embodiment of the present invention, the curve may be a serpentine line or a plurality of bending lines that are connected end to end. The present invention is not limited thereto, as the case may be.

In an embodiment of the present invention, in the embodiment of the present invention, the high frequency antenna 3 may be a monopole antenna, including: a conductor structure connected to the feeding end, the conductor structure may be metal In another embodiment of the present invention, the high frequency antenna 3 may be an IFA antenna (ie, an inverted F antenna), including: a first conductor structure that is simultaneously connected to the feed end and the ground end. The conductor structure may be a metal conductor or other conductors, which is not limited by the present invention, and is specific.

In the third embodiment of the present invention, the high frequency antenna 3 may further include a parasitic antenna, that is, a combined antenna of the IFA antenna and the parasitic antenna, including: a first conductor structure connected to the feeding end and the ground end at the same time, And a second conductor structure connected to the ground end; wherein the first conductor structure and the second conductor structure are coupled to each other, that is, the IFA antenna and the parasitic antenna are coupled to each other to increase the bandwidth of the high frequency antenna 3.

In the fourth embodiment of the present invention, the high frequency antenna 3 may be a loop antenna. In other embodiments of the present invention, the high frequency antenna 3 may also be in other structural forms, and the present invention does not do this. Limited, as the case may be.

In the fifth embodiment of the present invention, the high frequency antenna 3 may be a coupled loop antenna, including: a fourth trace connected to the feed end, the fourth trace being a U-shaped antenna; connected to the ground end a fifth trace, the fifth trace is a U-shaped antenna; the fourth trace and the fifth trace are insulated from each other, so that the radio frequency signal radiation range of the high-frequency antenna 3 is mainly concentrated in the first Between the four traces and the fifth trace. It can be seen that, in the antenna system provided by the embodiment of the present invention, the radio frequency signal received by the radio frequency signal transmitting and receiving end 1 can be divided into a high frequency signal and a low frequency signal by using the frequency dividing device 2; The frequency signal is transmitted to the high frequency antenna 3, and the low frequency signal is transmitted to the low frequency antenna 4, thereby adopting no The same antenna branch radiates outward, so that when applied to the communication terminal, the low-frequency current distribution of the antenna in the communication terminal can be changed not only by using the loop antenna, but also the low-frequency current distribution of the antenna in the communication terminal is relatively balanced, thereby improving the communication terminal. The radiation performance of the low frequency antenna 4 can also increase the distance between the feeding point of the high frequency antenna 3 and the antenna trace to the left and right hand molds by arranging the high frequency antenna 3 at an intermediate portion of the end of the communication terminal. The radiation performance during use of the high frequency antenna 3 of the communication terminal is improved, so that the antenna system can improve the radiation performance of the antenna system of the communication terminal in adapting to the trend of thinning and developing the communication terminal. As shown in FIG. 4, the embodiment of the present invention further provides a communication terminal, including: a main board, wherein the main board is provided with a feeding end and a ground end; and an antenna system connected to the main board, the antenna system is the above An antenna system according to any of the embodiments includes: a radio frequency signal transmitting and receiving end 1; a frequency dividing device 2 connected to the radio frequency signal transmitting and receiving end 1; and a high frequency antenna 3 connected to the frequency dividing device 2 A low frequency antenna 4 connected to the frequency dividing device 2, the low frequency antenna 4 being a loop antenna.

The frequency dividing device 2 is configured to output the radio frequency signal to the high frequency antenna 3 or the low frequency antenna 4 according to the frequency of the radio frequency signal received by the radio frequency signal transmitting and receiving end 1. In this embodiment, the high frequency antenna 3 is disposed at a central portion of the end of the communication terminal; the low frequency antenna 4 is disposed at the end of the communication terminal, and includes: a first trace 401 connected to the feed end, a second trace 402 connected to the ground, a third trace 403 connecting the first trace 401 and the second trace 402, wherein the first trace 401 and the second trace 402 are oppositely disposed at Both sides of the high frequency antenna 3.

Preferably, the first trace 401 and the second trace 402 are respectively disposed at two ends of the end of the communication terminal, which is not limited by the present invention. In other embodiments of the present invention, the A trace 401 and the second trace 402 may be arbitrarily disposed at arbitrary positions on both ends of the communication terminal, as long as they are respectively located on both sides of the high frequency antenna 3 to form a loop antenna.

In the communication terminal provided by the embodiment of the present invention, the high frequency signal and the low frequency signal of the antenna system are radiated outward by using different antenna branches. The antenna 4 is a loop antenna, so that A symmetric excitation current is generated on the main board, so that the distribution of the low frequency current on the low frequency antenna 4 is relatively balanced. The low-frequency radiation of the antenna system is related to the current distribution on the antenna, and the more the current distribution on the low-frequency antenna 4 is balanced, the better the performance of the head-mode of the low-frequency radiation of the antenna system, so the communication terminal provided by the embodiment of the present invention The low frequency antenna has better radiation performance.

The performance of the head mode of the high-frequency radiation of the antenna is related to the feeding position of the high-frequency antenna 3 and the position of the palm of the hand of the high-frequency antenna 3. The feeding position of the high-frequency antenna 3 and the high-frequency antenna 3 are farther away from the position of the left and right hand molds, and the performance of the head hand model of the antenna high-frequency radiation is better. In the communication terminal provided by the present invention, the high frequency antenna 3 is disposed at an intermediate portion of the end of the communication terminal such that the high frequency antenna 3 is far from the position of the hand mold, thereby weakening the The radiation of the high frequency signal is affected by the hand mode, and the radiation performance of the high frequency antenna in the antenna system of the communication terminal is improved.

As can be seen from the above, the communication terminal provided by the embodiment of the present invention divides the received radio frequency signal, and radiates the high frequency signal and the low frequency signal by using different antenna branches, so as to set the low frequency antenna 4 into a ring shape. An antenna is used to improve the performance of the head mode of the low frequency antenna 4, and a method of setting the high frequency antenna 3 at an intermediate portion of the end of the communication terminal to improve the performance of the head mode of the high frequency antenna 3 to improve the communication terminal The radiation performance of the antenna system, rather than increasing the clear space of the antenna in the communication terminal, to improve the radiation performance of the communication terminal antenna system, thereby improving the communication terminal antenna in adapting to the trend of thinning and developing the communication terminal Radiation performance of the system.

It should be noted that, since the area of the high frequency antenna 3 in the communication terminal is related to the frequency of the high frequency signal received by the communication terminal and the structure of the high frequency antenna 3, the present invention is directed to the high frequency antenna 3 The specific position is not limited. When the high frequency antenna 3 is located at the corner of the intermediate portion of the end portion of the communication terminal, the distance between the left and right hand molds of the two sides of the communication terminal is higher. Preferably, the closer to the central area of the end of the communication terminal, the better, to minimize the influence of the hand model on the high-frequency signal radiation, and improve the performance of the head mode of the high-frequency antenna 3 in the antenna system of the communication terminal, that is, The radiation performance of the high frequency antenna 3 during use of the communication terminal.

It should be noted that, in the embodiment of the present invention, the high frequency antenna 3 in the communication terminal The structure is not limited, as the case may be, as long as the high frequency antenna 3 is disposed in the middle portion of the end of the communication terminal to minimize the influence of the left and right hand modes on the high frequency signal radiation. The radiation performance of the high-frequency antenna 3 in the communication terminal antenna system can be used. The following description will be made in conjunction with specific embodiments.

Since the monopole antenna has low requirements on the clearance space, the smaller space can design an antenna that satisfies the performance requirements, but is greatly affected by the surrounding metal components and metal decoration. Therefore, in an embodiment of the present invention, when the antenna system of the communication terminal does not have a large metal device and a metal decoration, the high frequency antenna 3 is a monopole antenna, as shown in FIG. 5, including: a first conductor structure 301 connected to the electric terminal, wherein the feeding end is located at a center position of the end of the communication terminal, so that not only the performance of the head model of the radio frequency antenna 3 of the communication terminal can be improved, but also the The thickness of the communication terminal is more suitable for the development of the thinning and thinning of the communication terminal.

The IFA antenna is generally debugged according to the specific situation when the height and area of the antenna are difficult to meet the requirements of the IPFA antenna, and the clearance around the antenna is not good. Therefore, in another embodiment of the present invention, The high frequency antenna 3 is an IFA antenna, as shown in FIG. 4, and includes: a first conductor structure 301 connected to the feed end and the ground end, wherein the clear space around the antenna system is not good. The feeding end and the ground end are both located in a central area of the end of the communication terminal, so as to reduce the thickness of the communication terminal under the premise of improving the performance of the head model of the high frequency antenna 3 of the communication terminal. To meet the development needs of the thin and thin communication terminal. In the third embodiment of the present invention, on the basis of the embodiment shown in FIG. 4, the high frequency antenna 3 may further include a parasitic antenna, that is, a combined antenna of an IFA antenna and a parasitic antenna, as shown in FIG. The high frequency antenna 3 includes: a first conductor structure 301 connected to the feed end and the ground end, and a second conductor structure 302 connected to the ground end; wherein the first conductor structure 301 and the second conductor structure 302 are coupled to each other That is, the IFA antenna and the parasitic antenna are coupled to each other to increase the bandwidth of the high frequency antenna 3, and share the radiant energy on the IFA antenna in the high frequency antenna 3 onto the parasitic antenna, thereby making the The radiant energy of the high-frequency antenna 3 is concentrated as much as possible in the central region of the end portion of the communication terminal to further weaken the influence of the left and right hand modes received by the high-frequency antenna 3, and improve the performance of the head mode of the high-frequency antenna 3.

In the fourth embodiment of the present invention, as shown in FIG. 7, the high frequency antenna 3 is a loop antenna, so that the distribution of the high frequency current can be adjusted, and the cornerstone of the performance of the head die of the high frequency antenna 3 is improved. Above, the distribution of the high-frequency current is relatively balanced.

In the fifth embodiment of the present invention, as shown in FIG. 8, the high frequency antenna 3 is a coupled loop antenna, and includes: a fourth trace connected to the feed end and a fifth trace connected to the ground end; The fourth trace is a U-shaped antenna, and the fifth trace is a U-shaped antenna; the fourth trace and the fifth trace are insulated from each other, so that the radio frequency signal radiation range of the high-frequency antenna 3 is mainly Concentrating between the fourth trace and the fifth trace, thereby weakening the influence of the left and right hand modes received by the high frequency antenna 3, improving the performance of the head mold of the high frequency antenna 3, and also reducing the height The area of the frequency antenna 3.

In any of the above embodiments, the first trace 401 and the second trace 402 in the low frequency antenna 4 may be straight lines, as shown in FIG. 4-8, or may be curved, thereby extending the The length of the trace in the low frequency antenna 4 increases the electrical length of the low frequency antenna 4, thereby ensuring the signal receiving frequency of the communication terminal having a narrow width. In a specific embodiment of the embodiment, the curve may be a serpentine line or a plurality of bending lines that are connected end to end. As shown in FIG. 9 , the present invention does not limit this, depending on the specific situation. And set.

It should be noted that, in any of the foregoing embodiments, when the high frequency antenna and the low frequency antenna are located at the same end of the communication terminal, in the plane where the main board is located, the third line is 403 may be located on a side of the high frequency antenna 3 facing the main board, as shown in FIG. 2 to FIG. 9 , or may be located on a side of the high frequency antenna 3 facing away from the main board, as shown in FIG. 10 , The invention is not limited thereto. But preferably located on a side of the high frequency antenna 3 facing away from the main board to weaken the low frequency antenna The influence of the radiation signal of 4 on the radiation signal of the high frequency antenna 3.

It should be noted that, in an embodiment of the present invention, when the third trace 403 is located on a side of the high frequency antenna 3 facing away from the motherboard, and the housing of the communication terminal includes a metal frame At least one of the first trace 401, the second trace 402, and the third trace 403 is an integral part of the metal frame. Preferably, as shown in FIG. 11 and FIG. 12, in a specific embodiment of the present invention, the third trace 403 is located in a component of the metal frame to reduce the manufacturing process and cost of the low frequency antenna 4. In addition, the manufacturing process and cost of the communication terminal are reduced, but the invention is not limited thereto, and the first trace 401, the second trace 402, and the third trace 403 can be used as the metal frame. Components, depending on the situation. It can be seen that, in the communication terminal provided by the embodiment of the present invention, the high frequency antenna 3 is connected to the main board through a feeding end and/or a ground end, and the low frequency antenna 4 also passes through the feeding end and the ground. The end is connected to the motherboard. In an embodiment of the invention, the high frequency antenna 3 may be directly soldered to the main board or may be connected to the main board through a connecting member. Similarly, the low frequency antenna 4 can also be directly soldered to the main board or connected to the main board through a connecting member. The connecting member may be a metal elastic piece, a Pogo pin or a conductive connecting structure such as a conductive foam, which is not limited in the present invention.

It should be noted that the Pogo pin is a spring-type probe formed by the three basic components of the needle shaft, the spring and the needle tube, and is pre-pressed by precision instruments. It is widely used in mobile phones, communications, automobiles, medical, aerospace, etc. Precision connections in electronics.

In summary, the communication terminal provided by the embodiment of the present invention divides the received radio frequency signal into a high frequency signal and a low frequency according to the frequency of the radio frequency signal received by the radio frequency signal transmitting and receiving end 1 by using the frequency dividing device 2 . signal. Then, the high frequency signal is transmitted to the high frequency antenna 3, and the low frequency signal is transmitted to the low frequency antenna 4, so that different antenna branches are used to radiate outward, so that the embodiment of the present invention provides The communication terminal can not only change the low-frequency current distribution of the antenna in the communication terminal by using the loop antenna, but also balance the low-frequency current distribution of the antenna in the communication terminal to improve the radiation performance of the low-frequency antenna 4 of the communication terminal, and can also The high frequency antenna 3 is disposed at an intermediate portion of the end of the communication terminal to increase the distance between the feeding point of the high frequency antenna 3 and the antenna trace to the left and right hand models, and improve the high frequency antenna during use of the communication terminal. The radiation performance of 3, in order to adapt to the trend of thinning and developing communication terminals, improve the radiation performance of communication terminals. Each part of this manual is described in a progressive manner. Each part focuses on the differences from other parts. The same similar parts between the parts can be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but the scope of the invention.

+

Claims

Rights request

1. A communication terminal, characterized by including:

A mainboard, with a feed terminal and a ground terminal provided on the mainboard;

An antenna system connected to the mainboard, the antenna system including: a radio frequency signal transmitting and receiving end, a frequency dividing device connected to the radio frequency signal transmitting and receiving end, a high frequency antenna connected to the frequency dividing device, and A low-frequency antenna connected to the frequency dividing device;

Wherein, the frequency dividing device is used to output the radio frequency signal to a high frequency antenna or a low frequency antenna according to the frequency of the radio frequency signal transmitted by the radio frequency signal and received by the receiving end;

The high-frequency antenna is arranged in the middle area of the end of the communication terminal;

The low-frequency antenna is arranged at the end of the communication terminal and includes: a first trace connected to the feed end, a second trace connected to the ground end, and a second trace connecting the first trace and the second trace. The third trace is a trace, and the first trace and the second trace are arranged oppositely on both sides of the high-frequency antenna.

2. The communication terminal according to claim 1, characterized in that, when the signals received by the radio frequency signal transmitting and receiving ends are high-frequency signals, the frequency dividing device outputs the high-frequency signals to the high-frequency antenna; When the signal received by the radio frequency signal transmitting and receiving end is a low frequency signal, the frequency dividing device outputs the low frequency signal to a low frequency antenna.

3. The communication terminal according to claim 1 or 2, characterized in that, when the high-frequency antenna and the low-frequency antenna are located at the same end of the communication terminal, in the plane where the main board is located, the third The wiring is located on the side of the high-frequency antenna facing the main board or on the side of the high-frequency antenna facing away from the main board.

4. The communication terminal according to any one of claims 1 to 3, characterized in that the shape of the first wiring and/or the second wiring is a curve.

5. The communication terminal according to claim 4, characterized in that the curve is a serpentine line.

6. The communication terminal according to claim 3, wherein the third wiring is located on a side of the high-frequency antenna away from the main board, and when the casing of the communication terminal includes a metal frame, the At least one of the first wiring, the second wiring and the third wiring is a component of the metal frame.

7. The communication terminal according to any one of claims 1 to 6, characterized in that the high-frequency antenna is a monopole antenna, or a loop antenna, or an IFA antenna, or a combination antenna of an IFA antenna and a parasitic antenna, or Coupled loop antenna;

Wherein, the coupling loop antenna includes: a fourth wiring connected to the feed end, the fourth wiring being a U-shaped antenna; a fifth wiring connected to the ground end, the fifth wiring The wire is a U-shaped antenna; and the fourth wire and the fifth wire are insulated from each other.

8. The communication terminal according to claim 7, wherein the high-frequency antenna and the low-frequency antenna are directly welded to the main board, or the high-frequency antenna and the low-frequency antenna are connected through The components are connected to the motherboard.

9. An antenna system applied to a communication terminal. The communication terminal includes a feed end and a ground end. It is characterized in that the antenna system includes:

RF signal transmitting and receiving ends;

a frequency dividing device connected to the radio frequency signal transmitting and receiving ends;

A high-frequency antenna connected to the frequency dividing device;

A low-frequency antenna connected to the frequency dividing device. The low-frequency antenna is a loop antenna and includes: a first wiring connected to the feed end, a second wiring connected to the ground end, and a second wiring connected to the ground end. The first trace and the third trace of the second trace;

Wherein, the frequency dividing device is used to output the radio frequency signal to a high frequency antenna or a low frequency antenna according to the frequency of the radio frequency signal received by the radio frequency signal transmitting and receiving ends.

10. The antenna system according to claim 9, characterized in that, when the signals received by the radio frequency signal transmitting and receiving ends are high-frequency signals, the frequency dividing device outputs the high-frequency signals to the high-frequency antenna; When the signal received by the radio frequency signal transmitting and receiving end is a low frequency signal, the frequency dividing device outputs the low frequency signal to a low frequency antenna.

11. The antenna system according to claim 9 or 10, characterized in that, the first wiring and/or the shape of the second trace is a curve.

12. The antenna system according to claim 11, wherein the curve is a serpentine line.

13. The antenna system according to any one of claims 9 to 12, characterized in that the high-frequency antenna is a monopole antenna, or a loop antenna, or an IFA antenna, or a combination antenna of an IFA antenna and a parasitic antenna, or Coupled loop antenna;

Wherein, the coupling loop antenna includes: a fourth wiring connected to the feed end, the fourth wiring is a U-shaped antenna; a fifth wiring connected to the ground end, the fifth wiring is U-shaped Antenna; and the fourth wiring and the fifth wiring are insulated from each other.

+