CN103515688A - Communication apparatus - Google Patents
Communication apparatus Download PDFInfo
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- CN103515688A CN103515688A CN201210215483.8A CN201210215483A CN103515688A CN 103515688 A CN103515688 A CN 103515688A CN 201210215483 A CN201210215483 A CN 201210215483A CN 103515688 A CN103515688 A CN 103515688A
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Abstract
The invention discloses a communication apparatus. The apparatus comprises a support plate and an antenna system. The support plate comprises a current-conducting plate and a non-current-conducting plate. The current-conducting plate possesses a first edge and a second edge. The antenna system is located on the first edge of the current-conducting plate. The antenna system at least comprises a first antenna and a second antenna. The first antenna and the second antenna are operated in at least one first frequency band. A distance of the first edge and the second edge of the current-conducting plate is close to 0.25 times of a wavelength of a minimum frequency of the first frequency band and the distance is less than a length of the first edge. The antennas of the invention can reach good isolation without an isolation element and antenna efficiency basically maintains the same.
Description
Technical field
The present invention relates to a kind of communicator, particularly relate to a kind of communicator that comprises multiple-input and multiple-output (MIMO, the multi-input multi-output) antenna system of high-isolation.
Background technology
Along with masses increase day by day for the demand of volume of transmitted data, related communication standard also constantly promotes for the support of transmission rate.For example, IEEE 802.11n can support the operation of MIMO technology, and then promoting transmission rate.The standard of related mobile communication technology, as Long Term Evolution (LTE, long term evolution) system, also supports the operation of MIMO.As can be seen here, the operation of many antennas has become following trend.Because space that must be limited in mobile communications device configures a plurality of antennas, the isolation between antenna becomes the problem that must consider.
Traditionally, improving the isolation of MIMO antenna or reducing the method being coupled is between two adjacent antennas, to insert an isolated component, and wherein the resonance frequency of isolated component and antenna is roughly the same, to intercept the coupling between two antennas.The shortcoming of the method is to make antenna efficiency reduce, and affects the radiation characteristic of antenna.In addition, if antenna operation at LTE700 frequency band (704MHz ~ 787MHz), isolated component must resonate at about 700MHz, this will significantly increase the size of integrated antenna system, and then has increased the degree of difficulty that global design is integrated.
Therefore, be necessary to provide a kind of new communicator, the MIMO operation of its system must not provide an isolated component can reach preferably isolation, and antenna efficiency also can maintain roughly constant even lifting.
Summary of the invention
The object of the present invention is to provide a kind of communicator, it comprises an antenna system, and this antenna system comprises at least two antennas, and is positioned on an edge of a supporting bracket.Between described a plurality of antenna, do not need an isolated component can reach preferably isolation, and antenna efficiency remain unchanged substantially.
In one embodiment, the invention provides a kind of communicator, comprising: a supporting bracket, comprise a conductive plate and a nonconductive plate, wherein this conductive plate has one first edge and one second edge, and this second edge is the opposite side at this first edge, and adjacent with this nonconductive plate; And an antenna system, be positioned at this first edge, and at least comprise: one first antenna, operates at least one the first frequency band; And one second antenna, operate at least this first frequency band; Wherein, the distance at this first edge and this second edge is roughly 0.25 times of wavelength of the low-limit frequency of this first frequency band, and this distance is less than the length at this first edge.
Generally speaking, the first edge of traditional conductive plate and the distance at the second edge are conventionally much larger than 0.25 times of wavelength of the low-limit frequency of the first frequency band.Compared to traditional design mode, Novel support plate of the present invention can effectively improve the CURRENT DISTRIBUTION on conductive plate, and near the surface current in the first edge of conductive plate is declined.Because the surface current at the first edge of adjacent antennas system on conductive plate is for affecting the main factor intercoupling between antenna, therefore, the present invention is designed to the distance at the first edge of conductive plate and the second edge to approach 0.25 times of wavelength of the low-limit frequency of the first frequency band, and comes to integrate with antenna system by a composite supporting bracket that comprises a nonconductive plate and a conductive plate.The present invention not only can maintain the protection intensity of supporting bracket, also can reduce the coupling between two antennas, reaches the object of improving the isolation between antenna.
In one embodiment, the isolation (S21) of antenna system of the present invention in the first frequency band can have improvement degree more than 15dB, and reaches the isolation (S21) of approximately-28dB.At the same time, the radiation efficiency of antenna system can not reduce substantially.
Accompanying drawing explanation
Fig. 1 shows according to the schematic diagram of the communicator described in first embodiment of the invention;
Fig. 2 A shows according to the S Parameter Map of the antenna system of the communicator described in first embodiment of the invention;
Fig. 2 B is the S Parameter Map that shows antenna system while using complete conductive plate according to communicator;
Fig. 3 shows according to the schematic diagram of the communicator described in second embodiment of the invention;
Fig. 4 shows according to the schematic diagram of the communicator described in third embodiment of the invention.
[main description of reference numerals]
100,300,400～communicator;
The back of the body lid of 10～panel computer or the upper cover of notebook computer;
11,31,41～the first antennas;
111, the feed side of 311,411～the first antennas;
112, the short-circuit line of 312,412～the first antennas;
113, the signal source of 313,413～the first antennas;
12,32,42～the second antennas;
121, the feed side of 321,421～the second antennas;
122, the short-circuit line of 322,422～the second antennas;
123, the signal source of 323,423～the second antennas;
13,33,43～supporting bracket;
14,34,44～conductive plate;
141,341, the first edge of 443～conductive plate;
142,342, the second edge of 444～conductive plate;
15,35,45～nonconductive plate;
20, the reflection coefficient of 22～the first antennas (S11) curve;
201,221～the first frequency bands;
202,222～the second frequency bands;
21, isolation (S21) curve between 23～the first antennas and the second antenna;
343～indent is interval;
441～the first current-carrying parts;
442～the second current-carrying parts;
445～conductor adapting piece;
The length at the first edge of L～conductive plate;
The first edge of d～conductive plate and the distance at the second edge;
The distance at t～indent interval and the first edge.
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.
Fig. 1 shows according to the schematic diagram of the communicator 100 described in first embodiment of the invention.In the first embodiment, communicator 100 comprises: one first antenna 11, one second antenna 12, and a supporting bracket 13.The first antenna 11 and the second antenna 12 form an antenna system.Supporting bracket 13 comprises a conductive plate 14 and a nonconductive plate 15.Conductive plate 14 has the first edge 141 and the second edge 142, and wherein the second edge 142 is the opposite side at the first edge 141, and the second edge 142 is adjacent with nonconductive plate 15.The first antenna 11 has a feed side 111 and a short-circuit line 112.One signal source 113 is as the FD feed source of the first antenna 11.Short-circuit line 112 is electrically coupled to conductive plate 14，Er feed side 111 and is electrically coupled to signal source 113.The second antenna 12 has a feed side 121 and a short-circuit line 122.One signal source 123 is as the FD feed source of the second antenna 12.Short-circuit line 122 is electrically coupled to conductive plate 14，Er feed side 121 and is electrically coupled to signal source 123.The first antenna 11 of this antenna system and the second antenna 12 are all positioned at the first edge 141 of conductive plate 14, and roughly approach respectively the two corresponding corners at the first edge 141.The first antenna 11 and the second antenna 12 all operate at least one the first frequency band.The back of the body that supporting bracket 13 can be arranged at a panel computer covers 10, or is arranged at a upper cover 10 of a notebook computer.Supporting bracket 13 itself has enough durable tolerances, to provide communicator 100 resistance to compression protection.In the present embodiment, supporting bracket 13 can adopt the material of two kinds of high rigidity to meet the requirement of protecting intensity.Conductive plate 14 is made by a metal material, for example: almag (Aluminum Magnesium Alloy), it has good crushing resistance.15 of nonconductive plates are made by the non-conductive material of a high rigidity, for example: vitreous carbon fiber (Glass Fiber Reinforced Plastic).By the use of this composite, supporting bracket 13 can have enough durable tolerances, and the isolation of 12, the first antenna 11 and the second antenna is also increased.It should be noted that the present invention is not limited to this, in other embodiments, this antenna system also can comprise three above antennas.
Please also refer to Fig. 2 A and Fig. 2 B.Fig. 2 A shows according to the S Parameter Map of the antenna system of the communicator 100 described in first embodiment of the invention.In one embodiment, the length L at the first edge 141 of conductive plate 14 is about 260mm, and the distance d at the first edge 141 and the second edge 142 is about 110mm, and it approaches 0.25 times of wavelength of the low-limit frequency of the first frequency band 201.Under 6dB returns to the definition of loss (in general mobile communications device, Antenna Design standard), reflection coefficient (S11) curve 20 of the first antenna 11 of this antenna system can comprise one first frequency band 201 and one second frequency band 202.In preferred embodiment, the operation frequency range of the first frequency band 201 can be contained LTE700 frequency band (approximately between 704MHz and 787MHz), the operation frequency range of the second frequency band 202 can be contained LTE2300/2500 frequency band (approximately between 2300MHz and 2400MHz, and approximately between 2500MHz and 2690MHz).The present invention is not limited to this, and designer can adjust the first frequency band 201 and the second frequency band 202 via changing component size and parameter.In the first embodiment, reflection coefficient (S11) curve 20 of reflection coefficient (S22) curve of the second antenna 12 of this antenna system and the first antenna 11 is similar, also can comprise the first frequency band 201 and the second frequency band 202, is not repeated.The antenna system of the first embodiment can be applicable to the MIMO operation of LTE system, and its first antenna 11 and isolation (S21) curve 21 of the second antenna 12 in the first frequency band 201 can be lower than-28dB.
Fig. 2 B is the S Parameter Map that shows antenna system while using complete conductive plate according to communicator 100.In the present embodiment, the nonconductive plate 15 of supporting bracket 13 also replaces with another conductive plate.At 6dB, return under the definition of loss, reflection coefficient (S11) curve 22 of the first antenna 11 of antenna system can comprise one first frequency band 221 and one second frequency band 222.Reflection coefficient (S11) curve 22 of reflection coefficient (S22) curve of the second antenna 12 of antenna system and the first antenna 11 is similar, also can comprise at least the first frequency band 221 and the second frequency band 222, is not repeated.Compare with Fig. 2 A, isolation (S21) curve 23 only the reach approximately-13dBs of the antenna system of the present embodiment in the first frequency band 221, compared with the first embodiment 1-28dB comes poorly.The present invention adopts the supporting bracket 13 of composite, and makes the first edge 141 of conductive plate 14 and the distance at the second edge 142 approach 0.25 times of wavelength of the low-limit frequency of the first frequency band 201.Therefore, supporting bracket 13 not only has enough protection intensity, and can significantly improve the isolation (S21) of the first frequency band 201.In preferred embodiment, can the be less than-28dB of isolation (S21) in the first frequency band 201, can the be less than-25dB of isolation (S21) in the second frequency band 202.The first antenna 11 and the second antenna 12 are about respectively 40% to 55% in the antenna efficiency of the first frequency band 201 and the second frequency band 202, and 60% to 88% (including S parameter in consider radiation efficiency).Adopt the situation of complete conductive plate to compare with supporting bracket 13, the supporting bracket 13 of the first embodiment is used composite can't cause (comprising conductive plate 14 and nonconductive plate 15) decline of antenna efficiency.
Fig. 3 shows according to the schematic diagram of the communicator 300 described in second embodiment of the invention.The structure of the second embodiment is substantially similar to the first embodiment.In a second embodiment, supporting bracket 33 also comprises a conductive plate 34 and a nonconductive plate 35, and conductive plate 34 has one first edge 341 and one second edge 342.Both difference is, the conductive plate 34 of the communicator 300 of the second embodiment has an indent interval 343 (being roughly a rectangular indentation).Indent interval 343 is positioned at the second edge 342 of conductive plate 34, and the distance t at interval the 343 and first edge 341 of indent is less than the distance d at the first edge 341 and the second edge 342.In addition, the first antenna 31 and the second antenna 32 are not contained in the projection at the first edge 341 in indent interval 343.The first antenna 31 and the second antenna 32 form an antenna system.The first antenna 31 has a feed side 311 and a short-circuit line 312.One signal source 313 is as the FD feed source of the first antenna 31.The second antenna 32 has a feed side 321 and a short-circuit line 322.One signal source 323 is as the FD feed source of the second antenna 32.The first antenna 31 of antenna system and the second antenna 32 are all positioned at the first edge 341 of conductive plate 34, and roughly approach respectively the two corresponding corners at the first edge 341.
Fig. 4 shows according to the schematic diagram of the communicator 400 described in third embodiment of the invention.The structure of the 3rd embodiment is substantially similar to the first embodiment.In the 3rd embodiment, supporting bracket 43 also comprises a conductive plate 44 and a nonconductive plate 45.Both difference is, one first current-carrying part 441 that conductive plate 44 comprises and one second current-carrying part 442.The first current-carrying part 441 and the second current-carrying part 442 substantial separation.In addition, the first current-carrying part 441 is also electrically coupled to the second current-carrying part 442 via a conductor adapting piece 445.Conductive plate 44 has one first edge 443 and one second edge 444.The first antenna 41 and the second antenna 42 form an antenna system.The first antenna 41 has a feed side 411 and a short-circuit line 412.One signal source 413 is as the FD feed source of the first antenna 41.The second antenna 42 has a feed side 421 and a short-circuit line 422.One signal source 423 is as the FD feed source of the second antenna 42.The first antenna 41 of antenna system is adjacent to the first current-carrying part 441, and the second antenna 42 of antenna system is adjacent to the second current-carrying part 442.In addition, the first antenna 41 and the second antenna 42 roughly approach respectively the two corresponding corners at the first edge 443 of conductive plate 44.
In the present invention, the communicator 300 of the second embodiment and the communicator 400 of the 3rd embodiment are all similar to the communicator 100 of the first embodiment.Therefore these embodiment will have the operating characteristic similar to the first embodiment.
Though the present invention with preferred embodiment openly as above; so it is not in order to limit scope of the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when doing a little change and retouching, so the scope that protection scope of the present invention ought define depending on appended claim is as the criterion.
Claims (10)
1. a communicator, comprising:
One supporting bracket, comprises a conductive plate and a nonconductive plate, and wherein this conductive plate has one first edge and one second edge, and this second edge is the opposite side at this first edge, and adjacent with this nonconductive plate; And
One antenna system, is positioned at this first edge, and at least comprises:
One first antenna, operates at least one the first frequency band; And
One second antenna, operates at least this first frequency band;
Wherein, the distance at this first edge and this second edge is roughly 0.25 times of wavelength of the low-limit frequency of this first frequency band, and this distance is less than the length at this first edge.
2. communicator as claimed in claim 1, wherein this first antenna and this second antenna roughly lay respectively at the two corresponding corners at this first edge.
3. communicator as claimed in claim 1, wherein separately to have an indent interval for this conductive plate, and this indent interval is positioned at this second edge.
4. communicator as claimed in claim 3, wherein this indent distance interval and this first edge is less than the distance at this first edge and this second edge.
5. communicator as claimed in claim 3, wherein this first antenna and this second antenna are not contained in the projection at this first edge in this indent interval.
6. communicator as claimed in claim 1, wherein this supporting bracket is arranged at the Yi Beigai of a panel computer, or is arranged at a upper cover of a notebook computer.
7. communicator as claimed in claim 1, wherein this conductive plate comprises one first current-carrying part and one second current-carrying part, this first current-carrying part and this second current-carrying part substantial separation, this first current-carrying part is also coupled to this second current-carrying part via a conductor adapting piece, this first current-carrying part is adjacent to this first antenna, and this second current-carrying part is adjacent to this second antenna.
8. communicator as claimed in claim 1, wherein this antenna system also operates in one second frequency band higher than this first frequency band.
9. communicator as claimed in claim 8, wherein this first frequency band is contained LTE700 frequency band, and approximately between 704MHz between 787MHz; And this second frequency band is contained LTE2300/2500 frequency band, and approximately between 2300MHz between 2400MHz, and approximately between 2500MHz between 2690MHz.
10. communicator as claimed in claim 8, the wherein be all less than-25dB in this first frequency band and this second frequency band of the isolation between this first antenna and this second antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210215483.8A CN103515688A (en) | 2012-06-27 | 2012-06-27 | Communication apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210215483.8A CN103515688A (en) | 2012-06-27 | 2012-06-27 | Communication apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103515688A true CN103515688A (en) | 2014-01-15 |
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ID=49898030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210215483.8A Pending CN103515688A (en) | 2012-06-27 | 2012-06-27 | Communication apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN103515688A (en) |
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| CN109888460A (en) * | 2015-08-13 | 2019-06-14 | 三星电子株式会社 | Portable communication appts |
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| US10516772B2 (en) | 2015-08-13 | 2019-12-24 | Samsung Electronics Co., Ltd. | Antenna and electronic device including the same |
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| US11570286B2 (en) | 2015-08-13 | 2023-01-31 | Samsung Electronics Co., Ltd. | Antenna and electronic device including the same |
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