CN103457037A - Communication device - Google Patents
Communication device Download PDFInfo
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- CN103457037A CN103457037A CN2012101734855A CN201210173485A CN103457037A CN 103457037 A CN103457037 A CN 103457037A CN 2012101734855 A CN2012101734855 A CN 2012101734855A CN 201210173485 A CN201210173485 A CN 201210173485A CN 103457037 A CN103457037 A CN 103457037A
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- antenna
- slotted eye
- ground plane
- conducting surface
- frequency band
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Abstract
The invention provides a communication device which at least comprises a first conducting face and an antenna system. The antenna system at least comprises a first antenna, a second antenna and a grounding face and is roughly positioned at a first edge of the first conducting face, the first antenna and the second antenna at least operate in a first frequency band, the grounding face is roughly in the shape of an inverted T and comprises a main grounding face and a protruding grounding face, the main grounding face is coupled to the first conducting face, the protruding grounding face is positioned between the first antenna and the second antenna, the grounding face is provided with at least one first slotted hole, the length of each first slotted hole is roughly equal to half of wavelength of a frequency of the first frequency band, a part of each first slotted hole is positioned on the protruding grounding face, two closed ends of each first slotted hole are positioned on the main grounding face and are away from each other, and the first slotted holes increase the degree of isolation between the first antenna and the second antenna. The antenna system contained in the communication device can have high isolation degree and can also enable radiation efficiency of the antenna system to be maintained unchanged roughly and even increased.
Description
Technical field
The present invention relates to a kind of communicator, relate in particular to a kind of communicator with multiple-input and multiple-output (MIMO, multi-input multi-output) antenna system of high-isolation.
Background technology
Along with the demand to working transmission and transmission rate of communicator now increases day by day, the related communication standard also constantly promotes for the support of transmission rate, and multiple-antenna MIMO system receives simultaneously and the ability that transmits comes into one's own gradually.For instance, as radio area network (WLAN, wireless local area network) just communication specification IEEE 802.11n can support MIMO operation, and then promoting transmission rate, as can be seen here, the operation of many antennas has become following trend.But, owing to must in the inner limited space of communicator, inserting a plurality of antennas, by the hypotelorism caused between antenna each other, and the interference between antenna is also increasing.Keep the high-isolation between antenna to become very important challenge to the designer.
Traditionally, improving the isolation of multiaerial system or the mode of reduction coupled problem is to insert a parasitic isolating metal element between two antennas, wherein the resonance frequency of parasitic isolating metal element roughly approaches the resonance bands of antenna system, stop the current coupling between antenna, and then improve the isolation of antenna system.The radiation efficiency that the technology that but this kind utilizes block current flow to reach the reduction coupling also can make antenna system, because this parasitism isolating metal element reduces, affects the radiation characteristic of antenna system.
Therefore, be necessary to design a kind of new communicator, its antenna system included is except having preferably isolation, and also can allow its radiation efficiency remain roughly constant even increases.
Summary of the invention
In order to overcome the defect of prior art, the object of the present invention is to provide a kind of communicator, it comprises an antenna system, this antenna system comprises at least two antennas, between described a plurality of antennas, has high-isolation, and still has good radiation efficiency.
In preferred embodiment, the invention provides a kind of communicator, comprising: one first conducting surface, and an antenna system, be roughly a planar structure, and roughly be positioned at one first edge of this first conducting surface, wherein this antenna system comprises: one first antenna operates at least one the first frequency band, one second antenna, operate at least this first frequency band, an and ground plane, be roughly an inverted T-shape, and comprise a main ground plane and an outstanding ground plane, wherein this main ground plane is coupled to this first conducting surface, should give prominence to ground plane between this first antenna and this second antenna, and this ground plane has at least one the first slotted eye, the length of this first slotted eye is roughly 0.5 times of wavelength of a frequency of this first frequency band, the part of this first slotted eye is positioned at this outstanding ground plane, this first slotted eye has one first closed end and one second closed end, this first closed end and this second closed end be positioned at this main ground plane and mutually away from, and this first slotted eye makes the isolation between this first antenna and this second antenna increase.
It should be noted that antenna system of the present invention is to attract the surface current on ground plane by the first slotted eye in the resonance of the first frequency band, thereby reduce the current coupling between antenna.Therefore, antenna system can, under the situation that does not affect radiation efficiency, be reached the good isolation between antenna.
In one embodiment, ground plane also has one second slotted eye, and its length is roughly 0.5 times of wavelength of a frequency of one second frequency band.The part of the second slotted eye is positioned at main ground plane, and another part of the second slotted eye is positioned at outstanding ground plane.The second slotted eye can form resonance at the second frequency band, attracts the surface current on ground plane, thereby reduces the current coupling between antenna, and the isolation while making the first antenna and the second antenna operate in the second frequency band increases.
In another embodiment, also there is an opening slotted eye on ground plane.The openend of opening slotted eye is positioned at an edge of outstanding ground plane, and the length of opening slotted eye is roughly 0.5 times of wavelength of a frequency of the second frequency band.The opening slotted eye can form resonance at the second frequency band, attracts the surface current on ground plane, thereby reduces the current coupling between antenna, and the isolation while making the first antenna and the second antenna operate in the second frequency band increases.
In one embodiment, antenna system reaches the isolation of about 22dB (S21) in the first frequency band, and in the second frequency band the isolation of reach approximately-23dB (S21).Simultaneously, antenna system also has good radiation efficiency.
The antenna system that communicator of the present invention includes is except having preferably isolation, and also can allow its radiation efficiency remain roughly constant even increases.
The accompanying drawing explanation
Figure 1A is for showing the schematic diagram according to the described communicator of first embodiment of the invention;
Figure 1B is for showing the schematic diagram according to the described communicator of second embodiment of the invention;
Fig. 2 is for showing the schematic diagram according to the described antenna system of one embodiment of the invention;
Fig. 3 is for showing the schematic diagram according to the described antenna system of another embodiment of the present invention;
Fig. 4 is for showing the schematic diagram according to the described antenna system of further embodiment of this invention;
Fig. 5 is for showing the S Parameter Map of the antenna system shown in Fig. 4.
Wherein, description of reference numerals is as follows:
100,200～communicator;
10,14～antenna system;
11,12～the first conducting surfaces;
111, the first edge of 121～the first conducting surfaces;
13～the second conducting surfaces;
The second edge of 131～the second conducting surfaces;
The first antenna of 20～antenna system;
The first signal source of 201～the first antennas;
The second antenna of 21～antenna system;
The secondary signal source of 211～the second antennas;
22,32,42～the first slotted eyes;
221, the first closed end of 321,421～the first slotted eyes;
222, the second closed end of 322,422～the first slotted eyes;
23～medium substrate;
24,34,44～ground plane;
241,341,441～outstanding ground plane;
242,342,442～main ground plane;
347,348, the edge of 447～ground plane;
35～the second slotted eyes;
The 36～three slotted eye;
45～opening slotted eye;
The reflection coefficient curve of the first antenna of 50～antenna system;
The reflection coefficient curve of the second antenna of 51～antenna system;
The isolation curve of 52～antenna system;
53～the first frequency bands;
54～the second frequency bands.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, cited below particularlyly go out specific embodiments of the invention, and coordinate accompanying drawing, be described in detail below.
Figure 1A is for showing the schematic diagram according to the described communicator 100 of first embodiment of the invention.In the present embodiment, communicator 100 comprises an antenna system 10 and one first conducting surface 11, and wherein the first conducting surface 11 has one first edge 111.The first conducting surface 11 can be that one of a panel computer supports conductive plate, can also be a support conductive plate of a upper cover of a notebook computer.Antenna system 10 roughly is positioned at 111 places, the first edge of the first conducting surface 11.Antenna system 10 is roughly a planar structure, and the plane almost parallel at antenna system 10 places extending towards the direction away from the first conducting surface 11.
Figure 1B is for showing the schematic diagram according to the described communicator 200 of second embodiment of the invention.In the present embodiment, communicator 200 comprises one first conducting surface 12, one second conducting surface 13, and an antenna system 14.The first conducting surface 12 is electrically coupled to the second conducting surface 13.The second conducting surface 13 has one second edge 131, and it is adjacent to the first edge 121 of the first conducting surface 12.One of the upper cover that the second conducting surface 13 is a notebook computer supports conductive plate.Antenna system 14 is roughly between the second edge 131 of the first edge 121 of the first conducting surface 12 and the second conducting surface 13.
Fig. 2 is for showing the schematic diagram according to the described antenna system 14 of one embodiment of the invention.In the present embodiment, antenna system 14 comprises one first antenna 20, one second antenna 21, and a ground plane 24.In preferred embodiment, ground plane 24 is roughly an inverted T-shape.Antenna system 14 (for example: the FR4 substrate) is formed at a medium substrate 23.The first antenna 20 is excited by a first signal source 201, and the second antenna 21 is excited by a secondary signal source 211.The first antenna 20 and the second antenna 21 operate in respectively at least one the first frequency band.Ground plane 24 comprises outstanding ground plane 241 and a main ground plane 242.Outstanding ground plane 241 is between the first antenna 20 and the second antenna 21.Main ground plane 242 is electrically coupled to the first conducting surface 12.Ground plane 24 has at least one the first slotted eye 22.The length of the first slotted eye 22 is roughly 0.5 times of wavelength of a frequency of this first frequency band.The part of the first slotted eye 22 is positioned at outstanding ground plane 241.The first slotted eye 22 has one first closed end 221 and one second closed end 222, and it all is positioned on main ground plane 242, and mutually away from.The first closed end 221 is between the first antenna 20 and the first conducting surface 12, and the second closed end 222 is between the second antenna 21 and the first conducting surface 12.The first slotted eye 22 forms resonance at this first frequency band, attracts the surface current on ground plane 24, thereby reduces the current coupling between the first antenna 20 and the second antenna 21.Therefore, the present invention can increase the isolation between the first antenna 20 and the second antenna 21 effectively.
Fig. 3 is for showing the schematic diagram according to the described antenna system 14 of another embodiment of the present invention.Fig. 3 is basically similar to Fig. 2, and both difference is except having one first slotted eye 32, also to have one second slotted eye 35 and one the 3rd slotted eye 36 on the ground plane 34 of the antenna system 14 shown in Fig. 3.The length of the first slotted eye 32 is roughly 0.5 times of wavelength of this first frequency band, and the part of the first slotted eye 32 is positioned at outstanding ground plane 341.The first closed end 321 and second closed end 322 of the first slotted eye 32 are positioned on main ground plane 342, and mutually away from.The first closed end 321 is between the first antenna 20 and the first conducting surface 12, and the second closed end 322 is between the second antenna 21 and the first conducting surface 12.The length of the length of the second slotted eye 35 and the 3rd slotted eye 36 all is roughly 0.5 times of wavelength of a frequency of one second frequency band.The part of the second slotted eye 35 is positioned at outstanding ground plane 341, and another part of the second slotted eye 35 is positioned at main ground plane 342.Similarly, the part of the 3rd slotted eye 36 is positioned at outstanding ground plane 341, and another part of the 3rd slotted eye 36 is positioned at main ground plane 342.The second slotted eye 35 also is close to an edge 347 of ground plane 34 than the first slotted eye 32, and the edge 347 of ground plane 34 is towards the first antenna 20.Similarly, the 3rd slotted eye 36 also is close to another edge 348 of ground plane 34 than the first slotted eye 32, and the edge 348 of ground plane 34 is towards the second antenna 21.Isolation when the first slotted eye 32 makes the first antenna 20 and the second antenna 21 operate in this first frequency band increases, and the second slotted eye 35 and the 3rd slotted eye 36 isolation while making the first antenna 20 and the second antenna 21 operate in this second frequency band increases.
Fig. 4 is for showing the schematic diagram according to the described antenna system 14 of further embodiment of this invention.Fig. 4 is basically similar to Fig. 2, and both difference is except one first slotted eye 42 had, also to have an opening slotted eye 45 on the ground plane 44 of the antenna system 14 shown in Fig. 4.The length of the first slotted eye 42 is roughly 0.5 times of wavelength of a frequency of this first frequency band, and the part of the first slotted eye 42 is positioned at outstanding ground plane 441.The first closed end 421 and second closed end 422 of the first slotted eye 42 are positioned on main ground plane 442, and mutually away from.The first closed end 421 is between the first antenna 20 and the first conducting surface 12, and the second closed end 422 is between the second antenna 21 and the first conducting surface 12.The length of opening slotted eye 45 is roughly 0.5 times of wavelength of a frequency of this second frequency band.In preferred embodiment, opening slotted eye 45 is positioned on outstanding ground plane 441, and the openend of opening slotted eye 45 is positioned at an edge 447 of outstanding ground plane 441.Isolation when the first slotted eye 42 makes the first antenna 20 and the second antenna 21 operate in this first frequency band increases, and the isolation of opening slotted eye 45 while making the first antenna 20 and the second antenna 21 operate in this second frequency band increases.
Fig. 5 is for showing the S Parameter Map of the antenna system 14 shown in Fig. 4.In one embodiment, the size of antenna system 14 is about 55x9mm
2, and the size of the first conducting surface 12 and the second conducting surface 13 all is about 280x200mm
2.Reflection coefficient (S22) curve 51 of the reflection coefficient of the first antenna 20 (S11) curve 50 and the second antenna 21 returns at 10dB under the definition of loss, all can comprise one first frequency band 53 and one second frequency band 54.In preferred embodiment, the first frequency band 53 can be contained the required frequency range of radio area network (WLAN) 2.4GHz frequency band (2400MHz ~ 2484MHz), and the second frequency band 51 can be contained the required frequency range of radio area network 5.2/5.8GHz frequency band (5150MHz ~ 5350MHz/5725MHz ~ 5875MHz).In a second embodiment, when the antenna system 14 shown in Fig. 4 under the MIMO of wlan system operation, isolation (S21) curve 52 of the first antenna 20 and the second antenna 21 in the first frequency band 53 and the second frequency band 54 all can lower than-below 20dB.In addition, the antenna efficiency of the first antenna 20 (comprising the loss of impedance matching) is respectively 67% ~ 78% and 82% ~ 86% in the first frequency band 53 and the second frequency band 54, and the antenna efficiency of the second antenna 21 is respectively 60% ~ 81% and 80% ~ 91% in the first frequency band 53 and the second frequency band 54.Therefore, antenna system 14 of the present invention all has good radiation efficiency in the first frequency band 53 and the second frequency band 54.It should be noted that the various antenna systems 14 shown in Fig. 2, Fig. 3, Fig. 4 all can overlap for the communicator 100,200 shown in Figure 1A, Figure 1B.
Though the present invention discloses as above with preferred embodiment; so it is not in order to limit scope of the present invention; any those of ordinary skills; without departing from the spirit and scope of the present invention; when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the scope that claim defines.
Claims (10)
1. a communicator comprises:
One first conducting surface; And
One antenna system, be roughly a planar structure, and roughly be positioned at one first edge of this first conducting surface, and wherein this antenna system comprises:
One first antenna, operate at least one the first frequency band;
One second antenna, operate at least this first frequency band; And
One ground plane, be roughly an inverted T-shape, and comprise a main ground plane and an outstanding ground plane, wherein this main ground plane is coupled to this first conducting surface, should give prominence to ground plane between this first antenna and this second antenna, and this ground plane has at least one the first slotted eye, the length of this first slotted eye is roughly 0.5 times of wavelength of a frequency of this first frequency band, the part of this first slotted eye is positioned at this outstanding ground plane, this first slotted eye has one first closed end and one second closed end, this first closed end and this second closed end be positioned at this main ground plane and mutually away from, this first slotted eye makes the isolation between this first antenna and this second antenna increase.
2. communicator as claimed in claim 1, wherein this antenna system is formed on a medium substrate.
3. communicator as claimed in claim 1, wherein the plane almost parallel at this antenna system place extending towards the direction away from this first conducting surface.
4. communicator as claimed in claim 1, one of the upper cover that wherein this first conducting surface is a notebook computer supports conductive plate.
5. as claim 1 a described communicator, wherein this first conducting surface is that one of a panel computer supports conductive plate.
6. communicator as claimed in claim 1, wherein this communicator also comprises:
One second conducting surface, be coupled to this first conducting surface, and wherein this second conducting surface has this first edge that one second edge is adjacent to this first conducting surface, and this antenna system is roughly between this first edge and this second edge.
7. communicator as claimed in claim 1, wherein this first closed end of this first slotted eye is between this first antenna and this first conducting surface, and this second closed end of this first slotted eye is between this second antenna and this first conducting surface.
8. communicator as claimed in claim 1, wherein this ground plane also has one second slotted eye, the length of this second slotted eye is roughly 0.5 times of wavelength of a frequency of one second frequency band, the part of this second slotted eye is positioned at this main ground plane, and another part of this second slotted eye is positioned at this outstanding ground plane, and the isolation of this second slotted eye while making this first antenna and this second antenna operate in this second frequency band increases.
9. communicator as claimed in claim 8, this second slotted eye edge of contiguous this ground plane of this first slotted eye wherein, and this edge surface of this ground plane is to this first antenna or this second antenna.
10. communicator as claimed in claim 1, wherein this ground plane also has an opening slotted eye, one openend of this opening slotted eye is positioned at an edge of this outstanding ground plane, the length of this opening slotted eye is roughly 0.5 times of wavelength of a frequency of one second frequency band, and the isolation of this opening slotted eye while making this first antenna and this second antenna operate in this second frequency band increases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101734855A CN103457037A (en) | 2012-05-30 | 2012-05-30 | Communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101734855A CN103457037A (en) | 2012-05-30 | 2012-05-30 | Communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103457037A true CN103457037A (en) | 2013-12-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101734855A Pending CN103457037A (en) | 2012-05-30 | 2012-05-30 | Communication device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514606A (en) * | 2014-10-14 | 2016-04-20 | 宏碁股份有限公司 | Antenna system |
| CN109314313A (en) * | 2016-06-14 | 2019-02-05 | 三菱电机株式会社 | Array antenna device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100932420B1 (en) * | 2008-09-11 | 2009-12-17 | 동국대학교 산학협력단 | Multi input multi output antenna system |
| US20100073242A1 (en) * | 2008-09-25 | 2010-03-25 | Enrique Ayala Vazquez | Clutch barrel antenna for wireless electronic devices |
| EP2226894A1 (en) * | 2009-03-06 | 2010-09-08 | Thomson Licensing | Compact antenna system |
| US20100238079A1 (en) * | 2009-03-17 | 2010-09-23 | Mina Ayatollahi | High isolation multiple port antenna array handheld mobile communication devices |
| EP2434576A1 (en) * | 2010-09-22 | 2012-03-28 | Apple Inc. | Antenna structures having resonating elements and parasitic elements within slots in conductive elements |
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2012
- 2012-05-30 CN CN2012101734855A patent/CN103457037A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100932420B1 (en) * | 2008-09-11 | 2009-12-17 | 동국대학교 산학협력단 | Multi input multi output antenna system |
| US20100073242A1 (en) * | 2008-09-25 | 2010-03-25 | Enrique Ayala Vazquez | Clutch barrel antenna for wireless electronic devices |
| EP2226894A1 (en) * | 2009-03-06 | 2010-09-08 | Thomson Licensing | Compact antenna system |
| US20100238079A1 (en) * | 2009-03-17 | 2010-09-23 | Mina Ayatollahi | High isolation multiple port antenna array handheld mobile communication devices |
| EP2434576A1 (en) * | 2010-09-22 | 2012-03-28 | Apple Inc. | Antenna structures having resonating elements and parasitic elements within slots in conductive elements |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514606A (en) * | 2014-10-14 | 2016-04-20 | 宏碁股份有限公司 | Antenna system |
| CN109314313A (en) * | 2016-06-14 | 2019-02-05 | 三菱电机株式会社 | Array antenna device |
| CN109314313B (en) * | 2016-06-14 | 2021-07-23 | 三菱电机株式会社 | Array antenna device |
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Application publication date: 20131218 |