WO2014094637A1

WO2014094637A1 - Antenna device and method for forming antenna device

Info

Publication number: WO2014094637A1
Application number: PCT/CN2013/089999
Authority: WO
Inventors: 刘瑾; 林金强
Original assignee: 北京联想软件有限公司; 联想(北京)有限公司
Priority date: 2012-12-20
Filing date: 2013-12-19
Publication date: 2014-06-26
Also published as: CN103887606A; CN103887606B

Abstract

Provided are an antenna device and a method for forming the antenna device. The antenna device comprises: a first antenna unit located in a first location of an electronic apparatus and provided with a first feeding end; a second antenna unit located in a second location of the electronic apparatus adjacent to the first location and provided with a second feeding end; and a ground unit located between the first feeding end and the second feeding end. According to the technical solution in the embodiments of the present invention, by arranging the ground unit between adjacent antenna units, interference of adjacent antenna units can be reduced, thereby enabling different antenna units to be adjacently placed so as to save the space occupied by the antenna device.

Description

Antenna device and method for forming the antenna device

The present invention relates to the field of communications technologies, and more particularly to an antenna device and a method for forming an antenna device. Background technique

With the development of communication technologies, the working frequency band for communication is gradually increasing. However, due to the limitations of antenna technology, it is difficult to use one antenna to achieve communication in each working frequency band. To this end, two or more numbers of antennas may need to be placed in the electronic device to enable the electronic device to operate in different operating bands. In addition, in the third generation mobile communication technology and the fourth generation mobile communication technology, a multi-input multi-output (MIMO) antenna system is adopted, and two or more numbers are also required to be set in the MIMO antenna. Antennas are used to communicate to increase the capacity and spectrum utilization of the communication system.

In the case where two or more antennas are provided in the same electronic device, different antennas interfere with each other, thereby reducing antenna performance. For the problem of mutual interference between two antennas, the existing solution is to arrange two antennas at different positions of the electronic device and to be as far as possible to reduce mutual interference. For example, a MIMO antenna is designed at the upper and lower ends of a mobile phone to reduce the isolation between MIMO antennas by increasing the physical distance.

Arranging the antenna separately on the electronic device takes up a large space, which is disadvantageous for miniaturization of the electronic device. Also, when the number of antennas in the electronic device increases, it is difficult to select an appropriate position to set the respective antennas while ensuring the performance of the antenna. For example, when a 4 in 4 out MIMO antenna is used on a mobile phone, the isolation requirement between the four antennas cannot be satisfied.

Therefore, it is desirable to have an antenna isolation technique to reduce interference from adjacent antennas so that different antennas can be placed adjacent to each other to save space in the electronic device. Summary of the invention

Embodiments of the present invention provide an antenna apparatus and a method for forming an antenna apparatus capable of reducing interference of adjacent antenna elements, thereby enabling adjacent antenna units to be placed adjacently to save space occupied by the antenna apparatus.

In one aspect, an antenna device is provided for use in an electronic device, including: a first antenna unit, a first feeding unit located at a first position of the electronic device; a second antenna unit located at a second position of the electronic device adjacent to the first position, having a second feeding end; Located between the first feed end and the second feed end.

In the antenna device, the length and width of the ground unit may depend on a distance between the first feed end and the second feed end.

In the antenna device, the first feed end and the second feed end may be symmetrically located on both sides of the ground unit.

In the antenna device, the antenna device may be a multiple input multiple output antenna, and the multiple input multiple output antenna may further include: a third antenna unit located at a third position of the electronic device, the third position being away from the The first position and the second position, the third antenna unit has a third feed end.

In the antenna device, the multiple input multiple output antenna may further include: a fourth antenna unit located at a fourth position of the electronic device, the fourth position being adjacent to the third position, and away from the first And a fourth position, the fourth antenna unit has a fourth feed end; and an additional ground unit is located between the third feed end and the fourth feed end.

In the antenna device, the ground unit or the additional unit may be part of a ground of the electronic device.

In another aspect, a method for forming an antenna device is provided for use in an electronic device, the method comprising: providing a first antenna unit at a first location of the electronic device, the first antenna unit having a first feed end Providing a second antenna unit at a second position of the electronic device adjacent to the first position, the second antenna unit having a second feed end; between the first feed end and the second feed end Set the ground unit.

In the method for forming an antenna device, the disposing the ground unit between the first feed end and the second feed end may include: determining the first feed end and the second feed end The distance between the base units is set based on the distance between the first feed end and the second feed end.

In the method for forming an antenna device, the disposing the ground unit between the first feed end and the second feed end may include: determining the first feed end and the second feed end An intermediate position; the ground unit is disposed at the intermediate position such that the first feed end and the second feed end are symmetrically located on both sides of the ground unit.

In the method for forming an antenna device, the antenna device may be a multiple input multiple output antenna, the method further comprising: providing a third antenna unit at a third position of the electronic device, The third position is away from the first position and the second position, and the third antenna unit has a third feed end. In the method for forming an antenna device, the method may further include: providing a fourth antenna unit at a fourth position of the electronic device, the fourth position being adjacent to the third position, and away from the a first position and a second position, the fourth antenna unit has a fourth feed end; an additional ground unit is disposed between the third feed end and the fourth feed end.

In the method for forming an antenna device, the ground unit or the additional unit may be part of a ground of the electronic device.

In the above-described antenna apparatus and method for forming an antenna apparatus according to embodiments of the present invention, by providing a ground unit between adjacent antenna elements, interference of adjacent antenna elements can be reduced, thereby enabling different antennas to be placed adjacently The unit saves space occupied by the antenna device. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art without departing from the drawings.

1 is a block diagram illustrating the structure of an antenna device according to an embodiment of the present invention;

2 illustrates an exemplary structural diagram of an antenna apparatus according to another embodiment of the present invention; FIG. 3 is a flowchart illustrating a method for forming an antenna according to an embodiment of the present invention; A flow chart of a method for forming an antenna in accordance with another embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments.

In the above antenna apparatus and method for forming an antenna apparatus according to an embodiment of the present invention, a ground unit is added between different antenna units, and the ground unit changes a current direction and a coupling relationship between adjacent different antenna elements, Thereby the isolation performance between the different antenna elements is improved.

FIG. 1 is a block diagram illustrating the structure of an antenna device 100 according to an embodiment of the present invention. The antenna device 100 can be applied to various electronic devices such as a mobile communication terminal, a tablet computer, a notebook computer, a base station, etc., and the kind of the electronic device does not constitute a limitation of the present invention. The antenna device 100 includes: a first antenna unit 110, located at a first position of the electronic device, having a first feed end; and a second antenna unit 120 located at a position adjacent to the first location of the electronic device The second position has a second feeding end; the ground unit 130 is located between the first feeding end and the second feeding end.

The first antenna unit 110 and the second antenna unit 120 may be antennas implemented by any technique, such as a microstrip antenna, a monopole antenna, a loop antenna, or the like. The specific antenna type does not constitute a limitation of the present invention.

The first antenna unit 110 has a first feed end, thereby receiving a signal from a main processing circuit of an electronic device to which the antenna device is applied via a first feed terminal to radiate out, and transmit the received signal to the The main processing circuit performs reception processing. In the case where the first antenna unit 110 is a loop antenna, it may also have a first feed end for connecting the ground; in the case where the first antenna unit 110 is a monopole antenna, then it may not have the first One to the ground.

The second antenna unit 120 has a second feed terminal for receiving a signal from the main processing circuit via the second feed terminal to radiate out, and transmitting the received signal to the main processing circuit for receiving processing. Similar to the first antenna unit 110, the second antenna unit 120 may or may not have a second feed end depending on its type.

The frequency bandwidth of the first antenna unit 110 and the frequency bandwidth of the second antenna unit 120 may have the same frequency band or may have completely different frequencies. In the case where the first antenna unit 110 is used to implement Global System for Mobile Communications (GSM) communication and the second antenna unit 120 is used to implement Time Division Synchronous Code Division Multiple Access (TD-SCDMA) communication, the operating frequency band of the first antenna unit 110 is, for example, Including 824-960 ΜΗζ, 1710-2170 ΜΗζ, the operating frequency band of the second antenna unit 120 includes, for example, 824-894 MHz, in which case there is a partially overlapping operating frequency band between the two antenna elements. In a case where the first antenna unit 110 and the second antenna unit 120 are different antenna units in the MIMO antenna, the first antenna unit 110 and the second antenna unit 120 may be the same operating frequency band or different working frequency bands. Antenna units, thereby utilizing the diversity benefits between different antenna elements to increase the capacity and spectrum utilization of the communication system.

Since the first antenna unit 110 and the second antenna unit 120 are adjacently arranged, the first feed terminal and the second feed terminal are also adjacent, and thus may be generated during operation of the first antenna unit 110 and the second antenna unit 120. The following mutual interference: (i) interference at the feeding end, when the antenna signal is transmitted in the first feeding end and the second feeding end, respectively, the signals of the two feeding ends are leaked, which leads to the adjacent two feeding ends Interference between each other; (ii) mutual interference in free space, when the first antenna unit 110 and When the antenna signal of the two antenna unit 120 is simultaneously transmitted in the free space, an image signal of the signal transmitted by the second antenna unit 120 is generated in the first antenna unit 110, which may interfere with the signal transmission of the first antenna unit 110. And an image signal of the signal transmitted by the first antenna unit 110 is also generated in the second antenna unit 120, which may cause interference to the signal transmission of the second antenna unit 110.

The ground unit 130 is located between the first feeding end and the second feeding end, and forms physical isolation between the two feeding ends, thereby isolating the leaked signals in the first feeding end and the second feeding end , avoiding the above-mentioned interference at the feeding end. Furthermore, a ground unit 130 is arranged between the first feed end and the second feed end, which changes the current direction in the first feed end and the second feed end, for example such that the first feed end And a portion of the current in the second feed terminal flows to the ground unit, when a mirror image signal of the radiation signal of the first antenna unit 110 is generated in the second antenna unit 120, and when a second image is generated in the first antenna unit 110 When the image signal of the radiation signal of the antenna unit 120 is generated, the currents flowing to the ground unit 130 in the first feeding end and the second feeding end may generate phases opposite to each other, and may partially or completely cancel each other, thereby reducing The mutual interference of the antenna signals in free space. That is, the ground unit 130 not only physically isolates the first antenna unit 110 and the second antenna unit 120, but also changes the current trend in the first antenna unit 110 and the second antenna unit 120, thereby changing the first antenna unit 110. The coupling relationship with the second antenna unit 120 enables the mutual interference currents to be partially canceled, thereby improving the isolation effect between the first antenna unit 110 and the second antenna unit 120.

The length and width of the ground unit 130 depend on the distance between the first feed end and the second feed end. When the distance between the first feeding end and the second feeding end is far, the mutual interference is small, and the length and width of the ground unit 130 may be smaller; when the first feeding end and the second feeding end are When the distance between them is close, the length and width of the ground unit 130 may be increased to increase the area thereof to increase the isolation effect. The length of the ground unit 130 can be greater than or equal to the length of either of the two feed ends to provide better physical isolation.

Furthermore, the first feed end and the second feed end may be symmetrically located on both sides of the ground unit 130. This is because the radiation performance (for example, radiation power) of the first antenna unit 110 and the second antenna unit 120 is generally the same, and the first feed terminal and the second feed terminal are symmetrically disposed at the ground unit. Both sides of 130 cause the mirror currents in the first antenna unit 110 and the second antenna unit 120 to cancel each other more. In a case where the radiation performances of the first antenna unit 110 and the second antenna unit 120 are different, the first feeding end and the second feeding end may also be adjusted relative to the ground unit 130. Position to achieve the best offset.

In a particular implementation, the ground unit 130 can be part of the ground of the electronic device, such as a portion of a ground plane on a main processing single board of the electronic device.

In the technical solution of the antenna device according to the embodiment of the present invention, by providing a ground unit between adjacent antenna units, interference of adjacent antenna units can be reduced, thereby enabling different antenna units to be placed adjacent to each other to save the antenna device. The space occupied.

In the antenna device, different antenna isolation means can also be used in combination to arrange more antenna elements in the same electronic device. As an example, in addition to using the ground unit to isolate adjacent first antenna unit 110 and second antenna unit 120 as shown in FIG. 1, the antenna device may further include a third antenna unit, the third antenna unit Located at a third position of the electronic device, the third position is away from the first position and the second position, and the third antenna unit has a third feeding end, thereby isolating the first antenna unit 110 and the first unit by using the ground unit The two antenna units 120 are isolated from the first antenna unit 110 and the second antenna unit 120 by a long distance arrangement. Further, the antenna device may further include: a fourth antenna unit located at a fourth position of the electronic device, the fourth position being adjacent to the third position, and away from the first position and the second position, The fourth antenna unit has a fourth feed end; and an additional ground unit is located between the third feed end and the fourth feed end.

FIG. 2 illustrates an exemplary configuration diagram of an antenna device according to another embodiment of the present invention. In FIG. 2, the antenna device is a MIMO antenna (four in and four out) having four antenna units, and the antenna device includes: a MIMO antenna 1 located at the upper left of the printed circuit board (PCB) main board of the electronic device, having the first a feeding end and a first feeding end; a MIMO antenna 2, located at a right upper side of the PCB main board of the electronic device, having a second feeding end and a second feeding end; a ground unit located at the first feeding end and the first Between the two feed ends; the MIMO antenna 3, located at the lower left of the PCB main board of the electronic device, having a third feed end and a third feed end; the MIMO antenna 4 is located at the lower right of the PCB main board of the electronic device, having the a fourth feed end and a fourth feed end; an additional ground unit located between the third feed end and the fourth feed end. The ground unit or the additional ground unit is part of the ground of the electronic device.

In FIG. 2, the MIMO antenna 1 and the MIMO antenna 2 are isolated by a ground unit, and the MIMO antenna 3 and the MIMO antenna 4 are isolated by an additional unit, and the MIMO antenna 1 and the MIMO antenna 2 and the MIMO antenna 3 and the MIMO antenna 4 are used. Keep away from each other in position, separated by PCB motherboard. Thus, it can be seen that in the antenna device of Fig. 2, four antenna units can be arranged in the electronic device by providing the ground unit between the antenna units. However, in the existing farther away from the location In the technical solution of isolating the antenna unit, usually only two antenna units can be arranged. The length and width of the isolated ground may be adjusted according to the distance between the first feed end of the MIMO antenna 1 and the second feed end of the MIMO antenna 2. The current excitation of the MIMO antenna 1 and the current excitation of the MIMO antenna 2 are mutually canceled in the ground unit, so that the isolation performance of the MIMO antenna 1 and the MIMO antenna 2 can be effectively improved. Similarly, the length and width of the additional isolation ground may be adjusted according to the distance between the third feed end of the MIMO antenna 3 and the fourth feed end of the MIMO antenna 4, and the currents of the MIMO antenna 3 and the MIMO antenna 4 The excitations cancel each other out in the ground unit, so that the isolation performance of both can be effectively improved.

FIG. 3 is a flow chart illustrating a method 300 for forming an antenna in accordance with an embodiment of the present invention. The method 300 for forming an antenna can be applied to various electronic devices, and the kind of the electronic device does not constitute a limitation of the present invention.

The method 300 for forming an antenna includes: providing a first antenna unit at a first location of the electronic device, the first antenna unit having a first feed end (S310); adjacent to the first location of the electronic device The second position is set to the second antenna unit, the second antenna unit has a second feed end (S320); a ground unit is disposed between the first feed end and the second feed end (S330).

A first antenna unit is disposed in S310, and a second antenna unit is disposed in S320. The first antenna unit and the second antenna unit may be antennas implemented by any technique, such as a microstrip antenna, a monopole antenna, a loop antenna, or the like. The specific antenna type does not constitute a limitation of the present invention.

The first antenna unit is coupled to a main processing circuit of the electronic device via its feed terminal (i.e., the first feed terminal) to radiate and receive signals. The first antenna unit may also have a feed end for connecting to ground depending on the type of antenna. The second antenna unit is coupled via its feed terminal (i.e., the second feed terminal) to a main processing circuit of the electronic device to radiate and receive signals, which may also have a feed terminal. The frequency bandwidth of the first antenna unit and the frequency bandwidth of the second antenna unit may have the same frequency band or may have completely different frequencies.

Since the first antenna unit and the second antenna unit are arranged adjacently, the first feeding end and the second feeding end are also adjacent, so if there is no isolation measure in the first antenna unit and the second antenna unit, then in their Interference at the feed end and mutual interference in free space may occur during operation (as described in connection with Figure 1).

In S330, a ground unit is disposed between the first feeding end and the second feeding end. The ground unit forms physical isolation between the first feed end and the second feed end, thereby isolating the leaked signal in the first feed end and the second feed end, thereby avoiding interference of the feed end. In addition, being disposed at the first feed The ground unit between the terminal and the second feed terminal also changes the current direction in the first feed terminal and the second feed terminal, for example, causing a portion of the current in the first feed terminal and the second feed terminal to flow toward the current The units are described so as to be able to cancel each other partially or completely, thereby reducing mutual interference of the antenna signals in free space. Therefore, the ground unit in S330 not only physically isolates the first antenna unit and the second antenna unit, but also changes the current trend in the first antenna unit and the second antenna unit, thereby changing the first antenna unit and the second antenna unit The coupling relationship between the two causes the mutual interference current to partially cancel, thereby improving the isolation effect between the first antenna unit and the second antenna unit.

As an example, a ground unit may be disposed between the first feed end and the second feed end as follows: determining a distance between the first feed end and the second feed end; based on the first The distance between the feed end and the second feed end sets the length and width of the ground unit. When the distance between the first feeding end and the second feeding end is far, the mutual interference is small, and the length and width of the ground unit may be smaller; when the first feeding end and the second feeding end are When the distance between them is close, the length and width of the ground unit can be increased to increase the area to increase the isolation effect. The length of the ground unit may be greater than or equal to the length of either of the two feed ends to provide better physical isolation.

In the process of setting the ground unit in S330, an intermediate position of the first feed end and the second feed end may also be determined; and the ground unit is disposed at the intermediate position such that the first feed end and the first The two feed ends are symmetrically located on both sides of the ground unit. In a case where the radiation performance (for example, radiation power) of the first antenna unit and the second antenna unit are the same, the first feeding end and the second feeding end are symmetrically disposed on both sides of the ground unit. The mirror currents in the first antenna unit and the second antenna unit are caused to cancel each other more to achieve an optimum cancellation effect.

In a specific implementation, a part of the ground of the electronic device may be used as a ground unit, for example, a part of a ground layer on a main processing single board of the electronic device may be used as the ground unit.

In the technical solution of the method 300 for forming an antenna according to the embodiment of the present invention, by providing a ground unit between adjacent antenna units, interference of adjacent antenna units can be reduced, thereby enabling different antenna units to be placed adjacently. To save space occupied by the antenna device.

4 is a flow chart illustrating a method 400 for forming an antenna in accordance with another embodiment of the present invention. The method 400 for forming an antenna includes: providing a first antenna unit at a first location of the electronic device, the first antenna unit having a first feed end (S410); adjacent to the first location of the electronic device a second antenna unit is disposed in the second position, the second antenna unit has a second feeding end (S420); a ground unit is disposed between the first feeding end and the second feeding end (S430); a third antenna unit is disposed on the third position of the electronic device, the third position being away from the first position and the second position Position, the third antenna unit has a third feed end (S440); a fourth antenna unit is disposed at a fourth position of the electronic device, the fourth position is adjacent to the third position, and is away from the first And a second position, the fourth antenna unit has a fourth feed end (S450); an additional ground unit is disposed between the third feed end and the fourth feed end (S460).

Steps S410, S420, and S430 in Fig. 4 correspond to steps S310, S320, and S330 in Fig. 3, respectively. Steps S440, S440, and S450 are similar to the steps S410, S420, and S430, and are used to form third antenna units and fourth antenna units separated by additional units at different locations. The location unit or the additional location unit is part of the location of the electronic device. The structure of the antenna device implemented by the method of Fig. 4 is, for example, as shown in Fig. 2, in which different antenna isolation means are used in combination, thereby arranging more antenna elements in the same electronic device.

It is to be noted that the steps of Figure 4 can be added and removed as needed, or the order of the various steps can be adjusted. For example, when implementing a MIMO antenna of 3 in 3 out, steps S420 and S430 may be deleted in FIG. 4, or S450 and S460 may be deleted; steps similar to S440 may be added, or even similar to S440, S440, and S450 may be added. Three steps.

It will be apparent to those skilled in the art that for the convenience and cleansing of the description, the specific implementation of the apparatus and unit involved in the method (300, 400) for forming an antenna described above may be referred to the foregoing apparatus embodiment. The illustrations and operations in the description are not repeated here.

In the several embodiments provided herein, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, some of the steps in the above method embodiments may be recombined, or the order of execution prior to the partial steps may be changed.

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

Claims

Claim

An antenna device for use in an electronic device, comprising:

a first antenna unit, located at a first position of the electronic device, having a first feed end; a second antenna unit located at a second position of the electronic device adjacent to the first position, having a second feed End

a ground unit, located between the first feed end and the second feed end.

2. The antenna device according to claim 1, wherein a length and a width of said ground unit are dependent on a distance between said first feed end and said second feed end.

The antenna device according to claim 1, wherein the first feed end and the second feed end are symmetrically located on both sides of the ground unit.

4. The antenna device according to claim 1, wherein the antenna device is a multiple input multiple output antenna, and the multiple input multiple output antenna further comprises:

The third antenna unit is located at a third position of the electronic device, the third position is away from the first position and the second position, and the third antenna unit has a third feeding end.

The antenna device according to claim 4, wherein the multiple input multiple output antenna further comprises: a fourth antenna unit located at a fourth position of the electronic device, the fourth position being adjacent to the third position, and being far away The first position and the second position, the fourth antenna unit has a fourth feeding end;

An additional ground unit is located between the third feed end and the fourth feed end.

The antenna device according to claim 1 or 5, wherein said ground unit or said additional unit is a part of a ground of said electronic device.

A method for forming an antenna device, applied to an electronic device, the method comprising: providing a first antenna unit at a first position of the electronic device, the first antenna unit having a first feed end;

Providing a second antenna unit at a second position of the electronic device adjacent to the first location, the second antenna unit having a second feed end;

A ground unit is disposed between the first feed end and the second feed end.

8. The method according to claim 7, wherein the placing the unit between the first feed end and the second feed end comprises:

Determining a distance between the first feed end and the second feed end; The length and width of the ground unit are set based on a distance between the first feed end and the second feed end.

9. The method according to claim 7, wherein the placing the unit between the first feed end and the second feed end comprises:

Determining an intermediate position between the first feed end and the second feed end;

The ground unit is disposed at the intermediate position such that the first feed end and the second feed end are symmetrically located on both sides of the ground unit.

10. The method according to claim 7, wherein the antenna device is a multiple input multiple output antenna, the method further comprising:

A third antenna unit is disposed at a third position of the electronic device, the third position being remote from the first position and the second position, the third antenna unit having a third feed end.

11. The method according to claim 10, wherein the method further comprises:

Providing a fourth antenna unit at a fourth position of the electronic device, the fourth position being adjacent to the third position, and away from the first position and the second position, the fourth antenna unit having a fourth feed end ;

An additional ground unit is disposed between the third feed end and the fourth feed end.

12. A method according to claim 7 or 11, wherein said ground unit or said additional local unit is part of the ground of said electronic device.