CN101997564B - Multi-antenna communication apparatus - Google Patents
Multi-antenna communication apparatus Download PDFInfo
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- CN101997564B CN101997564B CN2009101693923A CN200910169392A CN101997564B CN 101997564 B CN101997564 B CN 101997564B CN 2009101693923 A CN2009101693923 A CN 2009101693923A CN 200910169392 A CN200910169392 A CN 200910169392A CN 101997564 B CN101997564 B CN 101997564B
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Abstract
The invention discloses a multi-antenna communication apparatus, comprising a circuit board having multiple layers of conductors and two antenna assemblies, wherein the antenna assemblies are respectively arranged on the antenna parts on different layers of the circuit board and provided with earth terminals; and the earth terminals are electrically connected to the conductors on the different layers of the circuit board, a current path between the two antenna assemblies is to a main earth through hole of the other layer of circuit board through the earth terminal of one of the two antenna assemblies, and is electrically connected to the earth terminal of the other of the two antenna assemblies.
Description
Technical field
The present invention relates to radio communication device, particularly the radio communication device of many antennas.
Background technology
Traditional radio communication device uses the single antenna launching electromagnetic wave with transmission signals at transmitting terminal, and also uses single antenna to receive the signal that electromagnetic wave was carried at receiving terminal.Yet along with the evolution of the communication of algorithms and the progress of method for manufacturing integrated circuit, radio communication device no longer is confined to use single antenna as transmitting and receiving electromagnetic assembly.
(multi-input and multi-output, radio communication device MIMO) use a plurality of antennas as transmitting and receiving electromagnetic assembly to multiple-input and multiple-output.Because it has the characteristic of spatial diversity (spectral diversity), the radio communication device of multiple-input and multiple-output can be issued to higher propagated flux and transmission range far away in the condition of not sacrificing frequency range and power consumption.Owing to possess above-mentioned this advantage, the radio communication device of multiple-input and multiple-output becomes the radio communication device of main flow gradually.
In the design of radio communication device, operated by rotary motion one antenna assembly is in a radio frequency (radio frequency, RF) antenna part of circuit plate.The conventional radio frequency circuit evenly distributes for making earthed voltage, the main grounding through hole (global ground via) of all can the spacious position on circuit board establishing in a wide range.Fig. 1 shows the circuit-board laying-out mode of a traditional double antenna communicator.As shown in Figure 1, this double antenna communicator 100 comprises radio circuit circuit board 110, and wherein this radio circuit circuit board 110 comprises four-layer circuit board, and evenly a plurality of main grounding through hole 140 that runs through this four-layer circuit board 110 is set.This radio circuit circuit board 110 comprises one first antenna module 120 and one second antenna module 130 in addition.This first antenna module 120 is arranged at the antenna part of ground floor circuit board, and this second antenna module 130 then is arranged at the antenna part of four-layer circuit board.
Radio communication device requires to have higher radiation efficiency mostly, and in the radio communication device of multiple-input and multiple-output, the isolation between the antenna is the key factor that influences antenna radiation efficiency.Yet along with the consumer electronics trend light, thin, short, little to product requirement, various radio communication devices also dwindle gradually and make the distance of putting between the antenna shorten, so and then cause the isolation between the antenna to reduce.
Problem for the isolation that solves between the antenna reduces generally adds open circuited transmission line between the load point of two antennas, or the circuit board grooving between the load point of two antennas.Fig. 2 shows the double antenna communicator that is applied to Fig. 1 in the mode that adds open circuited transmission line between the point of antenna feed-in.As shown in Figure 2, this first antenna module 120 and this second antenna module 130 are arranged at the left and right sides of this radio circuit circuit board 110 respectively to increase isolation.This double antenna communicator 100 increases length again between the load point of described antenna be the open circuited transmission line of 100 launching electromagnetic wave 1/4 wavelength of this double antenna communicator, with the isolation between the further increase antenna.
Fig. 3 shows the double antenna communicator that is applied to Fig. 1 with the circuit board grooving between the antenna load point.As shown in Figure 3, this first antenna module 120 and this second antenna module 130 are arranged at the left and right sides of this radio circuit circuit board 110 respectively to increase isolation.This double antenna communicator 100 is these radio circuit circuit board 110 groovings between the load point of described antenna again, wherein the length of this grooving is about 100 launching electromagnetic wave 1/4 wavelength of this double antenna communicator, and this grooving position does not have surface component or cabling, with the isolation between the further increase antenna.
Yet the mode of isolation all increases extra board area or manufacturing step between above-mentioned two kinds of increase antennas.Therefore, when the undersized radio communication device of design, for example (Universal Serial Bus, when USB) installing, described mode promptly is difficult to be applied USB.
The end view of the double antenna communicator of Fig. 4 displayed map 1.As shown in Figure 4, current path between this first antenna module 120 and this second antenna module 130 is from the earth terminal of this first antenna module 120 via this first antenna module 120, be connected to the main grounding through hole 140 of second layer circuit board antenna portion, be connected to the main grounding through hole 140 of the 3rd layer circuit board antenna part, the earth terminal via this second antenna module 130 is connected to this second antenna module 130 again.As shown in Figure 4, so short current path causes the coupling effect between this first antenna module 120 and this second antenna module 130 excessive, and makes that isolation each other is low excessively.
In view of the above, be necessary to design a kind of novel circuit-board laying-out mode, it can improve isolation and antenna radiation efficiency between the antenna under the situation that does not increase board area.
Summary of the invention
The break traditions design idea of radio circuit of multi-antenna communication device of the present invention, increase return flow path between the antenna alleviating the backflow coupling effect of earth-current on the circuit board by reducing grounding through hole between the antenna, and then reach the isolation between the high antenna and the purpose of antenna radiation efficiency.
The multi-antenna communication device of embodiments of the invention comprises circuit board and two antenna modules with multi-layer conductive.Described antenna module is arranged on the antenna part of this circuit board, and respectively has an earth terminal.Described earth terminal is electrically connected to the conductor of different layers in this circuit board, and the current path between wherein said two antenna modules to the main grounding through hole of another layer circuit board, and is electrically connected to wherein another described earth terminal in described two antenna modules via one of them the described earth terminal in described two antenna modules.
The multi-antenna communication device of another embodiment of the present invention comprises four-layer circuit board, one first antenna module and one second antenna module.Described circuit board has the main grounding through hole that runs through each layer in antenna part with exterior domain.This first antenna module is arranged at the antenna part of the superiors' circuit board.This second antenna module is arranged at the antenna part of orlop circuit board.This first antenna module is electrically connected to the lead of second layer circuit board via one first earth terminal, is electrically connected to the main grounding through hole of second layer circuit board again.This second antenna module is electrically connected to the lead of the 3rd layer circuit board via one second earth terminal, is electrically connected to the main grounding through hole of the 3rd layer circuit board again.
Description of drawings
Fig. 1 shows the circuit-board laying-out mode of a traditional double antenna communicator;
Fig. 2 shows the circuit-board laying-out mode of the double antenna communicator that another is traditional;
Fig. 3 shows the circuit-board laying-out mode of the double antenna communicator that another is traditional;
Fig. 4 shows the end view of a traditional double antenna communicator;
Fig. 5 shows the multi-antenna communication schematic representation of apparatus of embodiments of the invention;
Fig. 6 shows the end view of the multi-antenna communication device of embodiments of the invention; And
Fig. 7 shows the multi-antenna communication schematic representation of apparatus of another embodiment of the present invention.
[primary clustering symbol description]
100 double antenna communicators
110 radio circuit circuit boards
120 first antenna modules
130 second antenna modules
140 main grounding through hole
500 multi-antenna communication devices
510 radio circuit circuit boards
520 first antenna modules
530 second antenna modules
540 main grounding through hole
550 leads
560 leads
700 multi-antenna communication devices
710 radio circuit circuit boards
720 first antenna modules
730 second antenna modules
740 main grounding through hole
Embodiment
Fig. 5 shows the multi-antenna communication schematic representation of apparatus of embodiments of the invention.As shown in Figure 5, this multi-antenna communication device 500 is an a pair of antenna communication device.This multi-antenna communication device 500 comprises radio circuit circuit board 510, and wherein this radio circuit circuit board 510 comprises four-layer circuit board for instance.This radio circuit circuit board 510 comprises one first antenna module 520 and one second antenna module 530 in addition.This first antenna module 520 is arranged at the left side of the antenna part of ground floor circuit board, and this second antenna module 530 then is arranged at the right side of the antenna part of four-layer circuit board.The arrangement of this first antenna module 520 and this second antenna module 530 can be adopted left-right symmetric.This radio circuit circuit board 510 only evenly is provided with a plurality of main grounding through hole 540 that runs through this four-layer circuit board 510 in its main board portion, and there is no in its antenna part main grounding through hole 540 is set.
Fig. 6 shows the end view of the multi-antenna communication device of embodiments of the invention.As shown in Figure 6, this first antenna module 520 is arranged at the antenna part of ground floor circuit board, and the earth terminal of this first antenna module 520 is connected to second layer circuit board, is connected to the main grounding through hole 540 of main board portion again via lead 550.This second antenna module 530 is arranged at the antenna part of four-layer circuit board, and the earth terminal of this second antenna module 530 is connected to the 3rd layer circuit board, is connected to the main grounding through hole 540 of main board portion again via lead 560.Current path between this first antenna module 520 and this second antenna module 530 as shown in Figure 6, from the earth terminal of this first antenna module 520 via this first antenna module 520, lead 550 by second layer circuit board, be connected to the main grounding through hole 540 of second layer circuit board, be connected to the main grounding through hole 540 of the 3rd layer circuit board, by the lead 560 of the 3rd layer circuit board, the earth terminal via this second antenna module 530 is connected to this second antenna module 530 again.
As shown in Figure 6, the current path between this first antenna module 520 and this second antenna module 530 increases substantially than prior art, so significantly increased the isolation between the antenna.In part embodiment of the present invention, the length of this current path approximate this multi-antenna communication device 500 electromagnetic wavelength 1/4.Though it should be noted that the multi-antenna communication device of the embodiment of Fig. 6 this first antenna module 520 and this second antenna module 530 are arranged at the different layers circuit board, yet multi-antenna communication device of the present invention is not limited to this kind execution mode.For example this first antenna module 520 and this second antenna module 530 also can be arranged at same layer circuit board and still can reach purpose of the present invention.In addition, main grounding through hole is set, yet multi-antenna communication device of the present invention is not limited to this kind execution mode though the multi-antenna communication device of the embodiment of Fig. 5 there is no in antenna part.For example this radio circuit circuit board 510 also can be provided with a little main grounding through hole in antenna part, makes the distribution density of the distribution density of described main grounding through hole less than the main grounding through hole of the main board portion that is distributed in this radio circuit circuit board 510.As long as the setting of described main grounding through hole can increase return flow path between this first antenna module 520 and this second antenna module 530 to alleviate the backflow coupling effect of earth-current on this radio circuit circuit board 510, then still can reach purpose of the present invention.
Fig. 7 shows the multi-antenna communication schematic representation of apparatus of another embodiment of the present invention.This multi-antenna communication device 700 is an a pair of antenna communication device, and is applied to universal serial bus device (USB dongle).As shown in Figure 7, the size of this multi-antenna communication device 700 is about long 35 millimeters, and is wide 11 millimeters.This multi-antenna communication device 700 comprises radio circuit circuit board 710, one first antenna module 720, one second antenna module 730 and a plurality of main grounding through hole 740.This radio circuit circuit board 710 comprises four-layer circuit board.The size of this first antenna module 720 and this second antenna module 730 is about long 10 millimeters, and is wide 4 millimeters, and left and right symmetrically is arranged at the both sides of this radio circuit circuit board 710.The second layer of this radio circuit circuit board 710 and the 3rd layer all comprise lead and are electrically connected to described main grounding through hole 740 with the earth terminal with this first antenna module 720 and this second antenna module 730.The length of described lead is approximately between 8 millimeters to 12 millimeters.According to the circuit-board laying-out design of Fig. 7, this multi-antenna communication device 700 can operate in 2.4 to 2.5GHz frequency well.
According to experimental result, the multi-antenna communication device 700 of Fig. 7 all is about-10dB in the loss of echoing (return loss) of S11 when the frequency that operates in 2.4 to 2.5GHz, reaches the requirement of standard antenna.This multi-antenna communication device 700 aspect the isolation of S21, in 2.4GHz and 2.5GHz frequency all above prior art in the unidimensional multi-antenna communication device amplitude of 1dB at least.Aspect gain, the also more unidimensional double antenna communicator of this multi-antenna communication device 700 has tangible growth.
In sum, the break traditions design idea of radio circuit of multi-antenna communication device of the present invention, increase return flow path between the antenna to alleviate the backflow coupling effect of earth-current on the circuit board by reducing grounding through hole between the antenna, and can under the situation that does not increase board area, reach the purpose that significantly increases isolation.
Technology contents of the present invention and technical characterstic disclose as above, yet those skilled in the art still may be based on teaching of the present invention and announcements and made all replacement and modifications that does not deviate from spirit of the present invention.Therefore, protection scope of the present invention should be not limited to that embodiment discloses, and should comprise various do not deviate from replacement of the present invention and modifications, and is contained by the claim of claims.
Claims (9)
1. multi-antenna communication device comprises:
The circuit board of tool multi-layer conductive; And
Two antenna modules, it is arranged on the antenna part of described circuit board, and respectively has an earth terminal;
Wherein said earth terminal is electrically connected to the conductor of different layers in the described circuit board, and the current path between wherein said two antenna modules to the main grounding through hole of another layer circuit board, and is electrically connected to wherein another described earth terminal in described two antenna modules via one of them the described earth terminal in described two antenna modules.
2. multi-antenna communication device according to claim 1, wherein said antenna module are on set antenna part and the dereliction grounding through hole.
3. multi-antenna communication device according to claim 1, wherein said antenna module has main grounding through hole on set antenna part, and the distribution density of described main grounding through hole is less than the distribution density of the main grounding through hole of the main board portion that is distributed in described circuit board.
4. multi-antenna communication device according to claim 1, wherein said antenna module are arranged at same one deck of described circuit board.
5. multi-antenna communication device according to claim 1, wherein said antenna module is arranged at the different layers of described circuit board.
6. multi-antenna communication device according to claim 1, the length of wherein said current path approximate described multi-antenna communication device electromagnetic wavelength 1/4.
7. multi-antenna communication device according to claim 1, wherein said antenna module is symmetricly set in the left and right sides of the antenna part of described circuit board.
8. multi-antenna communication device according to claim 1, it is applied to universal serial bus device.
9. multi-antenna communication device according to claim 1, it operates in 2.4 to 2.5GHz frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101693923A CN101997564B (en) | 2009-08-27 | 2009-08-27 | Multi-antenna communication apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101693923A CN101997564B (en) | 2009-08-27 | 2009-08-27 | Multi-antenna communication apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN101997564A CN101997564A (en) | 2011-03-30 |
| CN101997564B true CN101997564B (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101693923A Active CN101997564B (en) | 2009-08-27 | 2009-08-27 | Multi-antenna communication apparatus |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202695725U (en) * | 2012-06-25 | 2013-01-23 | 中兴通讯股份有限公司 | Wireless equipment |
| CN103887606B (en) * | 2012-12-20 | 2017-04-19 | 联想(北京)有限公司 | Antenna device and method for making antenna device |
| WO2015113196A1 (en) * | 2014-01-28 | 2015-08-06 | 华为技术有限公司 | Antenna system, small cell, terminal and method for separating two antennas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5124733A (en) * | 1989-04-28 | 1992-06-23 | Saitama University, Department Of Engineering | Stacked microstrip antenna |
| CN1713448A (en) * | 2004-06-22 | 2005-12-28 | 明基电通股份有限公司 | Antenna device |
| CN2924811Y (en) * | 2006-03-02 | 2007-07-18 | 汉达精密电子(昆山)有限公司 | Printed circuit board antenna |
-
2009
- 2009-08-27 CN CN2009101693923A patent/CN101997564B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5124733A (en) * | 1989-04-28 | 1992-06-23 | Saitama University, Department Of Engineering | Stacked microstrip antenna |
| CN1713448A (en) * | 2004-06-22 | 2005-12-28 | 明基电通股份有限公司 | Antenna device |
| CN2924811Y (en) * | 2006-03-02 | 2007-07-18 | 汉达精密电子(昆山)有限公司 | Printed circuit board antenna |
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| CN101997564A (en) | 2011-03-30 |
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Owner name: LIANFA SCIENCE AND TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: RALINK TECHNOLOGY INC. Effective date: 20140919 |
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Effective date of registration: 20140919 Address after: China Taiwan Hsinchu Science Park Hsinchu city Dusing Road No. 1 Patentee after: MediaTek.Inc Address before: Hsinchu County, Taiwan, China Patentee before: Ralink Technology Inc. |