CN1728456A - Reversion F antenna system of four planes in use for terminals in multiple input/output communication system - Google Patents
Reversion F antenna system of four planes in use for terminals in multiple input/output communication system Download PDFInfo
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Abstract
According to four quadrants, four pieces of plane reversion F antenna unit in ground plane contraction type are arranged on front face of PCB. Adjacent two pieces of antenna are perpendicular to each other with gap in 0.1-0.5 times of operation wavelength of antenna unit. Antenna units in first and third quadrants are 180+10 degrees rotational symmetry for midpoint of connecting line between same points in two pieces of antenna. Distance between feeding points are larger than 0.25 time of wavelength. Antenna units in second and fourth quadrants are in same arrangement. There is cross extension type metal ground plane with via hole connected to ground of each antenna unit. Through via hole, metal layer on back face of PCB is connected to cross extension type metal ground plane. On metal layer in backside, there is slit on blank place between units of antenna in second and third quadrants. Advantages are: small cross coupling, high radiant efficiency and large system capacity.
Description
Technical field
The present invention relates to the antenna system field of many antennas of wireless communication terminal.
Background technology
Antenna is to be used for the radiated emission signal power in the wireless communication system and to receive the device that arrives signal power.Flat inversed F antenna (PIFA) is a kind of typical built-in antenna, and it is made up of conductor ground level, the radiation of conductors plane that is parallel to ground level, the conductor short circuit post that connects ground level and radiator plane, the conductor feeder pillar that is connected radio frequency feed line and radiator plane.The radiation characteristic of PIFA antenna is mainly determined by the surface current of antenna metal surface, the antenna pattern of PIFA antenna is mainly towards the outer normal orientation of radiator plane, the main lobe width of antenna pattern is relevant with the size of ground level, ground plane conductor is relative and the radiator plane conductor is big more, and main lobe concentrates on the outer normal orientation of radiator plane more.Single PIFA antenna element has low physical size, the advantage of high radiation efficiency [Kathleen L.Virga, Yahya Rahmat-Samii, " Low-Profile Enhanced-BandwidthPIFA Antennas for Wireless Communications Packaging ", IEEE Transactions On MicrowaveTheory and Techniques, Vol.45, No.10, pp.1879, Oct.1997].But the radiation efficiency of PIFA antenna is relevant with the stiffness of coupling of surrounding environment with it, when metallic object on every side near the strong part of PIFA antenna metal covering electric current in a wavelength, strong coupling may take place with the PIFA antenna in this metallic object, the part energy that is aerial radiation can be transferred on this metallic object, thereby causes the PIFA antenna radiation efficiency to descend.
Existing radio communication is normally singly imported single output (SISO:Single Input Single Output) mode, and promptly terminal is received and dispatched with an antenna of an antenna and base station and communicated by letter.Multiple-input and multiple-output (MIMO:Multi Input Multi Output) communication mode is a kind of newer communication technology, it be on the wireless terminal a plurality of antennas simultaneously with a plurality of antenna communications of base station.Because it has utilized the lower propagation path of correlation that exists in the communication environments to communicate by letter, the MIMO communication system in the environment of a large amount of reflections of the such existence in city and scatterer, in conjunction with the Space Time Coding technology, can obtain the channel capacity higher than SISO mode, thereby effectively improve power system capacity.The raising of this power system capacity is to solve the wireless data service demand that increases rapidly at present and one of effective means of contradiction between the communication network limited wireless access capability at present, therefore the MIMO technology is one of key technology of next generation mobile communication [Arogyaswami j.Paulraj, Dhananjay a.Gore, Rohit u.Nabar, Helmut b lcskei, " An Overview of MIMO Communications-A Key to Gigabit Wireless " .IEEEProceedings, pp.198,2004].Two big normal structures in the world, 3GPP, 3GPP2 and IEEE have used its air-interface standard of MIMO technique construction respectively in UMTS and 802.11n standard, and WI-FI has also used the MIMO technology in wave point.The MIMO technology is having wide practical use in systems such as cellular system, WLAN (wireless local area network).
The MIMO technology is divided into diversity, multiplexing, diversity and multiplexing compromise three kinds of citation forms.The MIMO diversity technique comprises space diversity, polarization diversity, directional diagram diversity on antenna realization means.Space diversity is a kind of antenna technology that can be used for mimo system.Radio wave propagates into reception antenna from transmitting antenna, in communication environments, there are a lot of propagation paths, the propagation distance difference of every paths, thus ripple to reach phase place also different, the power of the electromagnetic field of signal is exactly the multipath result of stack mutually of these outs of phase on the each point of space.At different acceptance points, because the difference of multipath phase place, the changes in amplitude of signal is very big, and promptly the power of signal presents tangible spatial distribution.At the abundant wireless propagation environment of multipath, in urban environment, indoor environment, the signal amplitude of space each point still changes violent on the distance within the wavelength, i.e. signal space decline on small scale is fairly obvious.The MIMO antenna is owing to used a plurality of antenna elements receive diversity on different spaces point, in conjunction with the space-time code technology, the signal amplitude difference that synchronization different antennae unit receives, received signal to noise ratio after the merging receives more stable than single antenna, therefore effectively resist the small scale spatial fading, improved channel capacity.The MIMO antenna also uses a plurality of antenna elements to transmit, because the decline situation difference of signal on the opposite end reception antenna of communication of the emission of the antenna on the different spaces point, in conjunction with the space-time code technology, the merging received signal to noise ratio of opposite end is more stable than the situation of single-antenna transmission, therefore also effectively resist the small scale spatial fading, improved channel capacity.
Polarization diversity is a kind of antenna technology that can be used for mimo system.All there be signal power in the polarised direction identical with transmitting antenna in the wireless signal of certain polarization with vertical with it polarised direction through the polarization diffusion can take place after the communication environments.And wireless terminal, particularly portable wireless terminal when work towards being at random, therefore the antenna polarization direction also is at random, for can stablize received signal power, the MIMO antenna can use the antenna element of different polarised directions, obtains stable received power with polarization diversity.
The directional diagram diversity is a kind of antenna technology that can be used for mimo system.Wireless signal is propagated in multi-path environment, through different propagation paths, arrives reception antenna with the different angles of arrival.Antenna can only receiving unit direction incoming wave signal, we obtain bigger received power with the different directions figure diversity reception of different antennae like this, this can resist the spatial fading on the small scale.
Multiplexing is a kind of antenna technology that can be used for mimo system.Wireless signal is propagated in multi-path environment, arrives reception antenna through different propagation paths.Enriching scattering environments, in urban environment, indoor environment, correlation is lower between the superposed signal of the superposed signal of a part of incoming wave and the incoming wave of another part.Therefore, no matter be in different locus, receive with different antenna elements with different polarised directions or with different antenna patterns, the data link at place, these antenna unit is uncorrelated mutually in enriching scattering environments, in conjunction with multiplexing coding techniques, can transmit data concurrently.The channel capacity of mimo system can be doubled and redoubled by the antenna element number like this.
No matter realize the MIMO antenna with any form, mimo system Capacity Ratio SISO power system capacity improves must satisfy two necessary conditions: 1) radio propagation channel between each antenna element of emission MIMO each antenna element of antenna and reception MIMO antenna correspondence has low correlation; 2) if we regard MIMO antenna element and channel as extended channel jointly, the extended channel of each unit correspondence still has low correlation.These two conditions are to realize with the ground level of several basic PIFA antennas is installed mutual vertically in some MIMO antenna scheme that proposed, but the terminal that requires to fix up an aerial wire has interval that enough big size makes antenna element enough far or no more than 2 of the antenna element quantity of installation.For the antenna terminal size at 0.5 times of wavelength with interior situation, the orthogonal scheme of ground level differs and realizes high radiation efficiency surely, has the problem that mutual coupling is strong, radiation efficiency is low.Particularly to be arranged in antenna element on each edge of terminal for hand-held mobile terminal, the mutually perpendicular arrangement of ground level, this causes the earth-current and surrounding environment, for example staff that encourage, stronger interaction is arranged on ground plane conductor, because there are the problem that matching properties is unstable and radiation efficiency descends in the influence of surrounding environment, this antenna system.Because the battery capacity of wireless terminal device is very limited usually, matching properties decline meeting unstable and radiation efficiency obviously increases power consumption of terminal, reduces stand-by time.
Mutual coupling between the antenna element increases the correlation of receiving and sending messages of the antenna element that coupling takes place on the other hand, this has destroyed MIMO realization of Communication condition, the the receiving and sending messages of data link that is the different antennae place must have low correlation, and this also is to have the MIMO antenna that uses the PIFA antenna element now to use a problem that exists on the small size wireless terminal.
Therefore, be necessary to improve the design and the arrangement of MIMO antenna, be applied to mimo system with being effective, particularly be applicable to small-size wireless terminal equipment.
Summary of the invention
The arrangement method that the purpose of this invention is to provide a kind of improved MIMO antenna element, particularly making with the PIFA antenna is that each unit of the MIMO antenna of unit has the data link of low correlation, improves the message capacity that mimo system can be obtained; And make each unit mutual coupling low, thereby improve the radiation efficiency of antenna and the stand-by time of wireless terminal, particularly the antenna element spacing 0.25 times to 1 times wavelength with interior Miniature Terminal on.
The objective of the invention is reasonably to arrange locus, spacing and the space correlation of PIFA antenna element, make MIMO have following characteristic:
1) obtain low related data link with minimum antenna element spacing, the MIMO antenna structure is compact as far as possible, particularly in the small-size wireless terminal.
2) antenna element has wide antenna pattern after being installed on the terminal, is being initial point with the antenna, crosses on the plane of initial point, and antenna pattern is near omnidirectional.
3) antenna pattern of each unit has complementarity, forms on sphere the directional diagram near omnidirectional jointly, realizes the directional diagram diversity.
4) the main pole direction of part antenna element is orthogonal, realizes polarization diversity.
5) mutual coupling is lower between many antenna elements, realizes low related data link, high radiation efficiency.
The 1st), 2), 3), 4), 5) characteristic all is in order to reduce the correlation that each antenna element place Radio Link is received and sent messages, and then improves the mimo system capacity.
The 5th) characteristic is in order to improve antenna radiation efficiency, and then reduces the wireless terminal power consumption, the stand-by time that prolongs wireless terminal.
The invention is characterized in;
Described antenna system contains:
Printed circuit board (PCB) 1, the back side of this printed circuit board (PCB) is metal level;
Four ground level shortening type flat inversed F antenna elements, wherein each described flat inversed F antenna element contains:
The conductor ground level, this ground level is that to be attached to described printed circuit board (PCB) positive and be parallel to the metal patch or the layer of metal of this printed circuit board (PCB) metal layer on back, and the free space that its length and width are less than or equal to the operating frequency correspondence of described flat inversed F antenna is propagated 0.2 times of wavelength;
The radiation of conductors plane, the parallel and described conductor ground level of this radiator plane, and also the length of this radiator plane and width are all less than 0.25 times of antenna operation wavelength;
Conductor short circuit face, this short circuit face is perpendicular to described ground level and connect described ground level and radiator plane;
The conductor feeder pillar, this feeder pillar is perpendicular to the inner wire and the described radiator plane of ground level and connection radio frequency feed line, and the outer conductor of radio frequency feed line links to each other with the metal level at the printed circuit board (PCB) back side;
The length on described radiation of conductors plane deducts the length of conductor ground level, and divided by the length on radiation of conductors plane, it is worth greater than 0.2 again;
Described four ground level shortening type flat inversed F antennas are used (2d) respectively, (2a), (2b), (2c) expression, be positioned at first successively, second, the 3rd, the 4th totally four quadrants, described four ground levels shorten in the flat inversed F antenna, the same edge of the conductor ground level of adjacent two described flat inversed F antenna elements is perpendicular to one another, the spacing of adjacent two described flat inversed F antenna elements equals the vertical range between the described each other ground level, this distance is between 0.1 ~ 0.5 times of wavelength of the operation wavelength of described flat inversed F antenna element, and described same edge is meant the identical limit, geometric position on described flat inversed F antenna element; Be in the flat inversed F antenna element of first, the 3 two quadrant the distributing point spacing, be in the distributing point spacing of flat inversed F antenna element of second, the 4 two quadrant all greater than 0.25 times of described flat inversed F antenna operation wavelength; The flat inversed F antenna element that is in first, the 3 two quadrant is 180 ± 10 degree rotation symmetries about the mid point of identical point line separately, the flat inversed F antenna element that is in the 3rd, the 4 two quadrant is 180 ± 10 degree rotation symmetries about the mid point of identical point line separately on same horizontal plane, described identical point is meant the point that the geometric position on described flat inversed F antenna element is identical.
The spacing of adjacent two described flat inversed F antenna elements is between 0.1～0.5 times of wavelength of the operation wavelength of described flat inversed F antenna element.
Described each flat inversed F antenna element also comprises the cross expanded metal ground level of a via hole ground connection, described cross expanded metal ground level is served as by the layer of metal on the front of described printed circuit board (PCB), or is parallel to the metal flat in described printed circuit board (PCB) front; The intersection crossroad of described cross expanded metal ground level between described each flat inversed F antenna element, and each bar limit of cross expanded metal ground level links to each other with described each flat inversed F antenna element respectively; Described each via hole connects the metal level at the described cross expanded metal ground level and the described printed circuit board (PCB) back side.
Described each flat inversed F antenna element also comprises the slot of the metal layer on back of a described printed circuit board (PCB), described slot second and the flat inversed F antenna element of third quadrant between blank space, be used to reduce the coupling that earth-current causes between the unit.
Example of the present invention has used " the ground surface shortening type PIFA antenna element of band via hole " with low-cross coupling characteristic, and its structure such as Fig. 3 institute are not.
Each element antenna directional diagram of MIMO antenna of the present invention is complementary on sphere, can constitute the omnidirectional radiation directional diagram jointly.Antenna pattern gains greater than 3dB on the main radiation direction of each antenna as shown in Figure 4.
Invention advantage of the present invention is that mutual coupling is little between the antenna element, particularly works as each unit interval of MIMO antenna within 0.5 times of wavelength.The measurement S parameter value of the reflection coefficient of each antenna element of invention example and coupling coefficient as shown in Figure 5.Transmission coefficient S parameter between each antenna element port is less than-8.5dB.Therefore the independence of each antenna element place data link is good, has bigger channel capacity in conjunction with space-time code technology, mimo system, this point is at document [Arogyaswami j.Paulraj, Dhananjay a.Gore, Rohit u.Nabar, Helmut b lcskei, " An Overview of MIMO Communications-AKey to Gigabit Wireless ", IEEE Proceedings, pp.198,2004] illustrate.
Invention advantage of the present invention is the about 0.15 times of wavelength of ground level length that CURRENT DISTRIBUTION is strong in the ground surface shortening type PIFA antenna element, that antenna element can be arranged like this is adjacent to each other, particularly spacing is within 0.5 times of wavelength, and mutual coupling simultaneously is little, radiation efficiency is high.The radiation efficiency η of i antenna element of MIMO antenna
iCan calculate by formula 1:
S wherein
IiBe the reflection coefficient of i antenna element, S
JiBe the S parameter of i antenna element to the transmission coefficient of j antenna element.S
JiMore little coupling coefficient is more little, and antenna radiation efficiency is high more.The radiation efficiency of each antenna element as shown in Figure 6 in the example of the present invention.Band internal antenna average radiation efficient is greater than 0.8.
Description of drawings
Fig. 1, arrangement examples of the present invention.
Fig. 2, enforcement figure of the present invention: a: not with via hole; B: have the cross expanded metal ground level of via hole; C: the cross expanded metal ground level of band ground level slot and via hole ground connection.
Fig. 3 has the ground surface shortening type flat inversed F antenna unit structure schematic diagram of via hole.
Fig. 4, the antenna pattern of each element antenna of the present invention.
Fig. 5, the measurement S parameter value of each element antenna of the present invention: a: element antenna 2a port data, b: element antenna 2b port data, c: the port data of element antenna 2c, d: the port data of element antenna 2d.
Fig. 6, radiation efficiency curve figure of the invention process.
Fig. 7, concrete layout plan of the invention process: a: antenna element size; B: antenna system size.
Embodiment
The MIMO antenna of the present invention's design is installed on the printed circuit board (PCB), with the unit of ground surface shortening type PIFA antenna as the MIMO antenna.Fig. 1 has provided a kind of arrangement method example of MIMO antenna.The 1st, printed circuit board (PCB), 2a, 2b, 2c, 2d are respectively the MIMO antenna elements.
The back side of printed circuit board (PCB) is that 3,4 ground surface shortening type PIFA of metal level antenna element is installed on the front of printed circuit board (PCB), is served as by the layer of metal on the front of printed circuit board (PCB), perhaps is parallel to the front of printed circuit board (PCB); The same edge of the ground level of adjacent antenna units is orthogonal, and described same edge is meant the identical limit, geometric position on described flat inversed F antenna element.
The present invention designs PIFA antenna element 2a and 2b, 2d are orthogonal, 2c and 2b, 2d are orthogonal, 2a and 2c are about mid point 180 ± 10 degree rotation symmetries of identical point line separately, 2b and 2d are about mid point 180 ± 10 degree rotation symmetries of identical point line separately, and described identical point is meant the point that the geometric position on described flat inversed F antenna element is identical.The tomograph of MIMO antenna example is shown in Fig. 2 (a).
The distributing point spacing of distributing point spacing, 2b and the 2d of antenna element 2a and 2c is greater than 0.25 times of operation wavelength.
The inventive features of the design's method also comprises the cross expanded metal ground level option of a via hole ground connection, shown in Fig. 2 (b).Cross expansion ground level 4 is served as by the layer of metal on the front of printed circuit board (PCB).Via holes 5 connect the metal level 3 at the expansion ground level 4 and the printed circuit board (PCB) back side.
The inventive features of the design's method also comprises the option of the back metal ground level slot of a printed circuit board (PCB), shown in Fig. 2 (c).Slot 6 between two antenna elements can reduce the coupling that earth-current causes between the unit.
The MIMO antenna of the present invention's design uses ground surface shortening type PIFA antenna as antenna element, and this is a kind of existing modified model PIFA antenna, and structure as shown in Figure 3.This antenna element by conductor ground level 2a-1, be parallel to the radiation of conductors plane 2a-2 of ground level, perpendicular to ground level and connect the conductor short circuit face 2a-3 of ground level and radiator plane, perpendicular to ground level and be connected radio frequency feed line and the conductor feeder pillar 2a-4 of radiator plane forms.
Selected ground slot and with the size example of the cross expanded metal ground level of via hole ground connection and ground surface shortening type PIFA antenna element as shown in Figure 7 for use, all units all are millimeters.
The ground level of antenna element 2a is connected with metal level 3 usefulness via holes (2a-5), and other unit connect with its corresponding via hole.
The conductor feeder pillar 2a-4 of antenna element 2a connects coaxial radio-frequency feeder line inner wire and radiation of conductors plane, and the coaxial feeder outer conductor connects the metal level 3 at the printed circuit board (PCB) back side, and other unit connect radio frequency feed line with its corresponding feeder pillar.Radio frequency feed line can be a coaxial line, microstrip line, band line.
The radio frequency feed line that each antenna element connects is connected to the transmitting-receiving port of each radio frequency link of mimo system.
This mimo system uses the space-time code technology.
Example of the present invention is operated in 2250-2300MHz, the radiation efficiency of its each antenna element as shown in Figure 6, under the situation of antenna element spacing less than 0.5 times of wavelength, with measuring antenna element radiation efficiency that the S parameter calculates according to formula (1) more than 75%, average efficiency is greater than 80%.The emulation directional diagram of each antenna element of MIMO has the lobe of broad as shown in Figure 4, in a plane near omnidirectional.Each antenna element towards difference, the polarised direction of each unit is also different, therefore above-mentioned MIMO antenna has the polarization diversity performance.
Claims (4)
1. be used for Siping City's reversion F antenna system of multiple-input-multiple-output wireless communication terminal, it is characterized in that:
Described antenna system contains:
Printed circuit board (PCB) 1, the back side of this printed circuit board (PCB) is metal level;
Four ground level shortening type flat inversed F antenna elements, wherein each described flat inversed F antenna element contains:
The conductor ground level, this ground level is that to be attached to described printed circuit board (PCB) positive and be parallel to the metal patch or the layer of metal of this printed circuit board (PCB) metal layer on back, and the free space that its length and width are less than or equal to the operating frequency correspondence of described flat inversed F antenna is propagated 0.2 times of wavelength;
Radiation of conductors plane, this radiator plane are parallel to described conductor ground level, and the length of this radiator plane and width are all less than 0.25 times of antenna operation wavelength;
Conductor short circuit face, this short circuit face is perpendicular to described ground level and connect described ground level and radiator plane;
The conductor feeder pillar, this feeder pillar is perpendicular to the inner wire and the described radiator plane of ground level and connection radio frequency feed line, and the outer conductor of radio frequency feed line links to each other with the metal level at the printed circuit board (PCB) back side;
The length on described radiation of conductors plane deducts the length of conductor ground level, and divided by the length on radiation of conductors plane, it is worth greater than 0.2 again;
Described four ground level shortening type flat inversed F antennas are used (2d) respectively, (2a), (2b), (2c) expression, be positioned at first successively, second, the 3rd, the 4th totally four quadrants, described four ground levels shorten in the flat inversed F antenna, the same edge of the conductor ground level of adjacent two described flat inversed F antenna elements is perpendicular to one another, the spacing of adjacent two described flat inversed F antenna elements equals the vertical range between the described each other ground level, this distance is between 0.1～0.5 times of wavelength of the operation wavelength of described flat inversed F antenna element, and described same edge is meant the identical limit, geometric position on described flat inversed F antenna element; Be in the flat inversed F antenna element of first, the 3 two quadrant the distributing point spacing, be in the distributing point spacing of flat inversed F antenna element of second, the 4 two quadrant all greater than 0.25 times of described flat inversed F antenna operation wavelength; The flat inversed F antenna element that is in first, the 3 two quadrant is 180 ± 10 degree rotation symmetries about the mid point of identical point line separately, the flat inversed F antenna element that is in the 3rd, the 4 two quadrant is 180 ± 10 degree rotation symmetries about the mid point of identical point line separately on same horizontal plane, described identical point is meant the point that the geometric position on described flat inversed F antenna element is identical.
2. Siping City's reversion F antenna system that is used for the multiple-input-multiple-output wireless communication terminal according to claim 1 is characterized in that:
The spacing of adjacent two described flat inversed F antenna elements is between 0.1～0.5 times of wavelength of the operation wavelength of described flat inversed F antenna element.
3. Siping City's reversion F antenna system that is used for the multiple-input-multiple-output wireless communication terminal according to claim 1 and 2 is characterized in that:
Described each flat inversed F antenna element also comprises the cross expanded metal ground level of a via hole ground connection, described cross expanded metal ground level is served as by the layer of metal on the front of described printed circuit board (PCB), or is parallel to the metal flat in described printed circuit board (PCB) front; The intersection crossroad of described cross expanded metal ground level between described each flat inversed F antenna element, and each bar limit of cross expanded metal ground level links to each other with described each flat inversed F antenna element respectively; Described each via hole connects the metal level at the described cross expanded metal ground level and the described printed circuit board (PCB) back side.
4. Siping City's reversion F antenna system that is used for the multiple-input-multiple-output wireless communication terminal according to claim 1 and 2 is characterized in that:
Described each flat inversed F antenna element also comprises the slot of the metal layer on back of a described printed circuit board (PCB), described slot second and the flat inversed F antenna element of third quadrant between blank space, be used to reduce the coupling that earth-current causes between the unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100120714A CN100372173C (en) | 2005-07-01 | 2005-07-01 | Reversion F antenna system of four planes in use for terminals in multiple input/output communication system |
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| CNB2005100120714A CN100372173C (en) | 2005-07-01 | 2005-07-01 | Reversion F antenna system of four planes in use for terminals in multiple input/output communication system |
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| CN100372173C CN100372173C (en) | 2008-02-27 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102738570A (en) * | 2012-04-23 | 2012-10-17 | 中兴通讯股份有限公司 | Multi-antenna terminal |
| CN102882015A (en) * | 2012-09-27 | 2013-01-16 | 广州杰赛科技股份有限公司 | Multi-input multi-output antenna system |
| CN104253303A (en) * | 2013-06-28 | 2014-12-31 | 华为技术有限公司 | Multiaerial system and mobile terminal |
| CN104269617A (en) * | 2014-09-19 | 2015-01-07 | 电子科技大学 | Planar dual-polarization UWB-MIMO antenna |
| TWI495277B (en) * | 2013-09-14 | 2015-08-01 | Univ Southern Taiwan Sci & Tec | Multi-input multi-output antenna for wireless transceiver |
| CN105990694A (en) * | 2015-02-11 | 2016-10-05 | 深圳市金溢科技股份有限公司 | Desktop issue device and reconfigurable antenna array control method thereof |
| TWI628860B (en) * | 2016-07-06 | 2018-07-01 | 新加坡商雲網科技新加坡有限公司 | Tri-polarization mimo antenna system |
| CN108832280A (en) * | 2018-06-08 | 2018-11-16 | 西安电子科技大学 | A kind of millimeter wave omnidirectional circular-polarized antenna can be used for 5G communication |
| CN112771719A (en) * | 2018-10-05 | 2021-05-07 | Ａｇｃ株式会社 | Antenna system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6072434A (en) * | 1997-02-04 | 2000-06-06 | Lucent Technologies Inc. | Aperture-coupled planar inverted-F antenna |
| US6738023B2 (en) * | 2002-10-16 | 2004-05-18 | Etenna Corporation | Multiband antenna having reverse-fed PIFA |
| CN100407497C (en) * | 2003-11-21 | 2008-07-30 | 富士康(昆山)电脑接插件有限公司 | Plane inverted F shaped antenna and its manufacturing method |
-
2005
- 2005-07-01 CN CNB2005100120714A patent/CN100372173C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738570A (en) * | 2012-04-23 | 2012-10-17 | 中兴通讯股份有限公司 | Multi-antenna terminal |
| CN102738570B (en) * | 2012-04-23 | 2016-01-20 | 中兴通讯股份有限公司 | Multi-antenna terminal |
| CN102882015B (en) * | 2012-09-27 | 2015-06-24 | 广州杰赛科技股份有限公司 | Multi-input multi-output antenna system |
| CN102882015A (en) * | 2012-09-27 | 2013-01-16 | 广州杰赛科技股份有限公司 | Multi-input multi-output antenna system |
| CN104253303B (en) * | 2013-06-28 | 2017-02-15 | 华为技术有限公司 | Multiaerial system and mobile terminal |
| CN104253303A (en) * | 2013-06-28 | 2014-12-31 | 华为技术有限公司 | Multiaerial system and mobile terminal |
| TWI495277B (en) * | 2013-09-14 | 2015-08-01 | Univ Southern Taiwan Sci & Tec | Multi-input multi-output antenna for wireless transceiver |
| CN104269617A (en) * | 2014-09-19 | 2015-01-07 | 电子科技大学 | Planar dual-polarization UWB-MIMO antenna |
| CN104269617B (en) * | 2014-09-19 | 2016-10-05 | 电子科技大学 | A kind of dual polarization UWB-MIMO antenna of plane |
| CN105990694A (en) * | 2015-02-11 | 2016-10-05 | 深圳市金溢科技股份有限公司 | Desktop issue device and reconfigurable antenna array control method thereof |
| TWI628860B (en) * | 2016-07-06 | 2018-07-01 | 新加坡商雲網科技新加坡有限公司 | Tri-polarization mimo antenna system |
| CN108832280A (en) * | 2018-06-08 | 2018-11-16 | 西安电子科技大学 | A kind of millimeter wave omnidirectional circular-polarized antenna can be used for 5G communication |
| CN112771719A (en) * | 2018-10-05 | 2021-05-07 | Ａｇｃ株式会社 | Antenna system |
| CN112771719B (en) * | 2018-10-05 | 2024-03-29 | Ａｇｃ株式会社 | Antenna system |
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