CN104051850A - Electrically steerable passive array radiator antenna with reconfigurable radiation pattern and configuration method thereof - Google Patents
Electrically steerable passive array radiator antenna with reconfigurable radiation pattern and configuration method thereof Download PDFInfo
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- CN104051850A CN104051850A CN201310080677.6A CN201310080677A CN104051850A CN 104051850 A CN104051850 A CN 104051850A CN 201310080677 A CN201310080677 A CN 201310080677A CN 104051850 A CN104051850 A CN 104051850A
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- antenna
- ground plane
- parasitic element
- switch
- electrical length
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/22—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element
- H01Q19/26—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element the primary active element being end-fed and elongated
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/28—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements
- H01Q19/32—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being end-fed and elongated
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention relates to an electrically steerable passive array radiator (ESPAR) antenna, particularly to an ESPAR antenna with a reconfigurable radiation pattern and a configuration method thereof. The antenna comprises a ground plane, a drive unit, a plurality of parasitic units; the drive unit is arranged on the ground plane and is oriented outwardly from the ground plane; the plurality of parasitic units arranged around the drive unit include control circuits for controlling the electrical lengths between the parasitic units and the ground plane. In addition, the invention also provides a method for configuring the antenna. The method comprises: scanning wave beams of the antenna in all possible working states; comparing the scanning results with a predetermined radiance standard and selecting one scanning result best meeting the predetermined radiance standard; configuring the antenna according to the selected scanning result; and detecting the radiance of the antenna and repeating the above operations when the detected radiance lower than the predetermined radiance standard.
Description
Technical field
The present invention relates generally to antenna technology, relates to especially the reconfigurable automatically controlled passive array radiator of a kind of antenna pattern (Electrically Steerable Passive Array Radiator, hereinafter referred to as ESPAR) antenna and collocation method thereof.
Background technology
Reconfigurable antenna is the electrical characteristics of one or more antennas, comprises antenna pattern, polarization or operating frequency, the antenna that can be reconstructed or adjust.Various environment can be applicable to because wireless telecommunications require the antenna of equipment, directional diagram reconstructable aerial can be adopted under many circumstances.ESPAR antenna is exactly one of them.Fig. 1 (a) is a kind of stereogram of traditional ESPAR antenna 100.Except driver element 102 and ground plane 106, this ESPAR antenna 100 also comprises several driver element 102 parasitic element 104 around that is centered around.Fig. 1 (b) is depicted as the typical control circuit of parasitic element 104 in traditional E SPAR antenna 100.This control circuit is by adopting variable voltage source 112 to produce different direct voltages under the control of control signal S1, thereby the equivalent capacitance value of change variable capacitance 114 makes ESPAR antenna 100 produce different antenna patterns.
The problem of traditional E SPAR antenna is to use variable voltage source and variable capacitance to change the electromagnetic property of parasitic element, thus the complex structure of traditional E SPAR antenna and cost also very high.
Summary of the invention
Existence in view of the above problems, need to invent a kind of simple in structure and ESPAR antenna that cost is relatively cheap.
One aspect of the present invention discloses a kind of antenna, comprises ground plane; Driver element, is positioned on described ground plane and is oriented to from described ground plane outside; Parasitic element, is positioned at described driver element around, and described parasitic element comprises control circuit, for controlling the electrical length between described parasitic element and described ground plane.
Especially, described control circuit comprises the first switch, for making described parasitic element be connected with described ground plane by the first electrical length under the control of first signal; Second switch, for making described parasitic element be connected with described ground plane by the second electrical length under the control of secondary signal; Wherein, described the first electrical length is different from described the second electrical length.
Especially, described parasitic element also comprises metal bar, and it is oriented to from described ground plane outside; Described control circuit also comprises transmission line, is connected between described metal bar and described second switch; Described the first switch is between described metal bar and described ground plane; The length that described the first electrical length is described metal bar; Described the second electrical length is the length of described metal bar and described transmission line.
Especially, described transmission line is to be embedded in described ground plane and to be positioned at described metal bar co-planar waveguide or other planar transmission lines around.
Especially, described parasitic element also comprises the isolation strip between described transmission line and described ground plane, and described the first and second switches are positioned among described isolation strip.
Especially, described isolation strip is be positioned at space around of described parasitic element or be made up of insulating material.
Especially, wherein when described the first switch conduction, when described second switch disconnects, described parasitic element is operated in director state; When described the first switch disconnects, when described second switch conducting, described parasitic element is operated in reflector state.
Especially, described switch comprises PIN switching diode, switch mosfet, microelectron-mechanical radio frequency (MEMS RF) switch or other radio-frequency (RF) switch.
Especially, described antenna further comprises several parasitic element, and wherein each described parasitic element comprises control circuit described at least one, for controlling the electrical length between corresponding described parasitic element and described ground plane.
Especially, described ground plane is circular, and described several parasitic element is along the radial distribution of ground plane.
In embodiment of the present invention, adopt simple Digital Circuit Control signal just can directly adjust the antenna pattern of described ESPAR antenna.This antenna is not only simple in structure, and low cost of manufacture also has higher reliability.
The present invention discloses a kind of method on the other hand, and for above-mentioned antenna is configured, the method comprises: the wave beam under all possible operating state of above-mentioned antenna is scanned; Scanning result and predetermined radiance standard are compared, and select and wherein can meet the scanning result that described predetermined radiance requires; According to selected go out scanning result above-mentioned antenna is configured; And detect the radiance of above-mentioned antenna, when detected radiance is during lower than described predetermined radiance standard, repeat aforesaid operations.
Especially, the operation that above-mentioned antenna is configured comprises, according to selected go out scanning result adjust conducting or the off-state of the switch in the control circuit of described several parasitic elements.
Adopt method of the present invention, user can, according to the variation of different needs and applied environment, adjust the configuration of ESPAR antenna flexibly.
Brief description of the drawings
Fig. 1 (a) is the stereogram of existing ESPAR antenna;
Fig. 1 (b) is the typical control circuit of parasitic element in existing ESPAR antenna;
Fig. 2 (a) is the stereogram of described according to one embodiment of present invention ESPAR antenna;
Fig. 2 (b) is the enlarged drawing of the parasitic element of ESPAR antenna shown in Fig. 2 (a);
Fig. 2 (c) is the circuit diagram of the parasitic element control circuit of the ESPAR antenna shown in Fig. 2 (a);
Fig. 2 (d) is the vertical view of the ESPAR antenna shown in Fig. 2 (a);
Fig. 3 is according to the antenna pattern of the ESPAR antenna described in one embodiment of the invention; And
Fig. 4 is the flow chart of the described according to one embodiment of present invention method that ESPAR antenna of the present invention is configured; And
Fig. 5 is the list of the example combinations of the parasitic element of described according to one embodiment of present invention ESPAR antenna.
embodiment
Discuss manufacture and the use of the application's embodiment below in detail.But, should be understood that, the invention provides the many feasible inventive concept that can implement under various concrete backgrounds.The specific embodiment of discussing is only that explanation is manufactured and uses concrete mode of the present invention, does not limit the scope of the invention.
Fig. 2 (a) is depicted as according to the stereogram of the described ESPAR antenna 200 of one embodiment of the invention.Described antenna 200 comprises driver element 202 and ground plane 206.Ground plane can be circular, and around this circle ground plane 206, can have the sleeve 208 of conduction.One or more parasitic element 204 is distributing around driver element 202.The structure of described multiple parasitic element 204 can be identical.
As shown in Fig. 2 (b), each parasitic element 204 comprises Metallic rod 212 and control circuit.Described control circuit comprises transmission line 214, switch 216 and 218, and isolation strip 217 between transmission line 214 and ground plane 206.In one embodiment of the invention, transmission line 214 is embedded in ground plane 206, and along the radial distribution of ground plane 206.Transmission line 214 can be made up of co-planar waveguide, microstrip line or other planar transmission lines.Isolation strip 217 can be the gap around transmission line 214, or is made up of any insulating material well known to those skilled in the art.
According to one embodiment of present invention, switch 216 and 218 can be PIN switching diode as shown in the figure.In other embodiments, switch 216 and 218 can also be microelectron-mechanical radio frequency (MEMS RF) switch or MOS transistor or other radio-frequency (RF) switch device.
Fig. 2 (c) is the circuit diagram of parasitic element 204 control circuits.Concrete, the first branch road comprises resistance R 1 and the inductance L 1 of series connection, optionally also comprises the amplifier 211 of series connection with it.One end of inductance L 1 is connected with metal bar 212, and is connected with one end of switch 216 with transmission line 214.The second branch road comprises resistance R 2 and the inductance L 2 of series connection, optionally also comprises the amplifier 213 of series connection with it.One end of inductance L 2 is connected with one end of switch 218, and is connected with the other end of transmission line 214 by capacitor C.
In the first situation, input signal Sa and Sb make switch 216 conductings and switch 218 are disconnected.Like this, metal bar 212 just can be directly connected to ground level by switch 216.In this case, according to one embodiment of present invention, electrical length (electrical length) between parasitic element 204 and ground level is the length of described metal bar 212, and this length is slightly less than 1/4 wavelength, therefore parasitic element 204 can be operated in director (director) pattern.
In the second situation, input another group signal Sa and Sb, switch 216 is disconnected and make switch 218 conductings.Like this, metal bar 212 just can be connected to ground level by transmission line 214 and switch 218.Capacitor C is for the impact of isolated DC control signal Sa on switch 218, and capacitor C can not exert an influence to the AC signal of the metal bar 212 of flowing through.In this case, according to one embodiment of present invention, electrical length between parasitic element 204 and ground level is the length that the length of described metal bar 212 adds the above transmission line 214, and this length is slightly larger than 1/4 wavelength, therefore parasitic element 204 can be used as reflector (reflector) pattern that is operated in.
According to one embodiment of present invention, in the time that switch 216 and 218 is all switched on, identical with above-mentioned the first situation.
As can be seen here, by the various combination of switch 216 and 218 conductings and off-state, can give the electromagnetic property that parasitic element 204 is different, thereby the direction of antenna 200 is produced to different impacts.
Should be noted that, to comprise taking parasitic element 204 exemplary illustrated that two switches 216 and 218 carry out as example above, but according to other embodiments of the invention, parasitic element can comprise more switch, thereby by controlling the different electrical length between parasitic element 204 and ground level, for example parasitic element 204 can be connected with ground level by a part for transmission line 214, controls the characteristic of parasitic element 204, thereby adjusts the antenna pattern of antenna 200.
Fig. 2 (d) is the vertical view of the described ESPAR antenna 200 of one embodiment of the invention.In the example shown in this figure, 12 parasitic elements 204 are divided into 6 groups, and are radially distributed in uniformly on ground plane 206 as interval taking 60 ° of angles.Wherein each parasitic element has respectively two switch A and B.As mentioned above, for each parasitic element, there are three kinds of effective situations, for the antenna 200 shown in Fig. 2 (d), just should have 3 so
12plant different combinations of states.Fig. 5 has only listed a part for these combinations.
Figure 3 shows that the directional diagram of the antenna corresponding with the combined situation of listing in Fig. 5 200.As shown in Fig. 3 (a)-(d), the in the situation that of combination 0-3, antenna 200 can form the monodirectional beam with different beamwidth and beam direction.As shown in Fig. 3 (e)-(g), the in the situation that of combination 4-6, the antenna pattern of antenna 200 can comprise two bundle main beams, and interval angle difference each other.As shown in Fig. 2 (d), the distribution of parasitic element is rotational symmetric as unit taking 60 ° of angles, and the radiation profiles of antenna 200 also exists corresponding symmetric relation.
In Fig. 5 under listed each combined situation the standing-wave ratio (Voltage Standing Wave Ratio, VSWR) of antenna 200 all lower than 5, even some is lower than 3.For example, in the situation that combining 1, antenna 200 can have the gain up to 8.8db.According to other embodiments of the invention, can also be at exterior arrangement impedance matching network, realize better coupling.
Certainly, the distribution in Fig. 2 (d) is only to illustrate at this as example, and different ESPAR antennas can have the distribution of different parasitic element.
Figure 4 shows that the flow chart of a kind of method that is configured of ESPAR antenna that the present invention is introduced that another embodiment of the present invention describes.In step 402, by base station, the wave beam under the various possibility of described antenna 200 operating state is scanned.This scanning can be the scanning of the wave beam to 360 ° of 200 overlay planes of antenna.These possible operating states are to be determined by the various combination situation of switch in parasitic element.In step 404, this base station receives the result scanning, and this result and predetermined antenna radiation characteristics standard are compared.The radiation characteristic of antenna can comprise antenna pattern, polarization, operating frequency, power or signal to noise ratio etc.In step 406, the comparative result drawing according to step 404 is found out one or more combinations that meet predetermined radiance standard.In step 408, according to determined one or more combinations, described antenna is configured.According to one embodiment of present invention, above-mentioned configuration is that switch situation by adjusting in described antenna 200 realizes.In step 410, the radiation characteristic of described antenna is detected, if detect characteristic lower than predetermined level, turn back to step 402, restart scanning, otherwise antenna 200 will remain on this configuration status.
Those skilled in the art are easy to just learn, can change within the scope of the invention materials and methods.Should also be understood that except the concrete linguistic context for embodiment is described, the invention provides many applicable inventive concept.Correspondingly, claims are intended to synthetic to such process, machine, manufacture, material, device, method or step to be included in their scope.
Claims (12)
1. an antenna, comprising:
Ground plane;
Driver element, is positioned on described ground plane and is oriented to from described ground plane outside;
Parasitic element, is positioned at described driver element around, and described parasitic element comprises control circuit, for controlling the electrical length between described parasitic element and described ground plane.
2. antenna as claimed in claim 1, wherein said control circuit comprises:
The first switch, for making described parasitic element be connected with described ground plane by the first electrical length under the control of first signal;
Second switch, for making described parasitic element be connected with described ground plane by the second electrical length under the control of secondary signal;
Wherein, described the first electrical length is different from described the second electrical length.
3. antenna as claimed in claim 2, wherein said parasitic element also comprises metal bar, it is oriented to from described ground plane outside; Described control circuit also comprises transmission line, is connected between described metal bar and described second switch; Described the first switch is between described metal bar and described ground plane; The length that described the first electrical length is described metal bar; Described the second electrical length is the length of described metal bar and described transmission line.
4. antenna as claimed in claim 3, described transmission line is to be embedded in described ground plane and to be positioned at described metal bar co-planar waveguide or other planar transmission lines around.
5. antenna as claimed in claim 4, described parasitic element also comprises the isolation strip between described transmission line and described ground plane, described the first and second switches are positioned among described isolation strip.
6. antenna as claimed in claim 5, described isolation strip is be positioned at space around of described parasitic element or be made up of insulating material.
7. antenna as claimed in claim 2, wherein when described the first switch conduction, when described second switch disconnects, described parasitic element is operated in director pattern; When described the first switch disconnects, when described second switch conducting, described parasitic element is operated in reflector mode.
8. antenna as claimed in claim 2, wherein said switch comprises PIN switching diode, switch mosfet, microelectron-mechanical radio frequency (MEMS RF) switch or other radio-frequency (RF) switch.
9. as the antenna as described in arbitrary in claim 1-8, further comprise several parasitic element, wherein each described parasitic element comprises control circuit described at least one, for controlling the electrical length between corresponding described parasitic element and described ground plane.
10. antenna as claimed in claim 9, wherein said ground plane is circular, described several parasitic element is along the radial distribution of ground plane.
11. 1 kinds of methods, for antenna described in claim 9 is configured, the method comprises:
Wave beam under all possible operating state of described antenna is scanned;
Scanning result and predetermined radiance standard are compared, and select and wherein can meet the scanning result that described predetermined radiance requires;
According to selected go out scanning result described antenna is configured; And
Detect the radiance of described antenna, when detected radiance is during lower than described predetermined radiance standard, repeat aforesaid operations.
12. methods as claimed in claim 11, the operation wherein described antenna being configured comprises, according to selected go out scanning result adjust conducting or the off-state of the switch in the control circuit of described several parasitic elements.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310080677.6A CN104051850A (en) | 2013-03-13 | 2013-03-13 | Electrically steerable passive array radiator antenna with reconfigurable radiation pattern and configuration method thereof |
| PCT/IB2014/000570 WO2014140791A1 (en) | 2013-03-13 | 2014-03-07 | Electrically steerable passive array radiator antenna with reconfigurable radiation pattern and method of configuring the same |
| EP14728619.9A EP2973867A1 (en) | 2013-03-13 | 2014-03-07 | Electrically steerable passive array radiator antenna with reconfigurable radiation pattern and method of configuring the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310080677.6A CN104051850A (en) | 2013-03-13 | 2013-03-13 | Electrically steerable passive array radiator antenna with reconfigurable radiation pattern and configuration method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104051850A true CN104051850A (en) | 2014-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310080677.6A Pending CN104051850A (en) | 2013-03-13 | 2013-03-13 | Electrically steerable passive array radiator antenna with reconfigurable radiation pattern and configuration method thereof |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2973867A1 (en) |
| CN (1) | CN104051850A (en) |
| WO (1) | WO2014140791A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716421A (en) * | 2015-04-08 | 2015-06-17 | 南开大学 | Reconfigurable antenna in programmable control |
| CN107369910A (en) * | 2016-05-12 | 2017-11-21 | 上海贝尔股份有限公司 | Microstrip antenna and corresponding aerial array based on directional diagram diversity |
| WO2018119911A1 (en) * | 2016-12-29 | 2018-07-05 | 深圳天珑无线科技有限公司 | Antenna having reconfigurable radiation pattern, and communication apparatus |
| WO2018137545A1 (en) * | 2017-01-27 | 2018-08-02 | Huawei Technologies Co., Ltd. | Reconfigurable radial-line slot antenna array |
| CN108808223A (en) * | 2018-06-28 | 2018-11-13 | 袁涛 | Direction reconfigurable antenna |
| CN108987949A (en) * | 2018-07-26 | 2018-12-11 | 中国电建集团成都勘测设计研究院有限公司 | A kind of antenna system of restructural radiation mode |
| CN109411876A (en) * | 2017-08-16 | 2019-03-01 | 华为技术有限公司 | A kind of antenna and communication equipment |
| CN110265792A (en) * | 2018-03-12 | 2019-09-20 | 杭州海康威视数字技术股份有限公司 | Antenna assembly and unmanned plane |
| CN110474152A (en) * | 2019-07-26 | 2019-11-19 | 常熟市泓博通讯技术股份有限公司 | Antenna with eight modes |
| CN111819734A (en) * | 2018-01-05 | 2020-10-23 | 维斯普瑞公司 | Beam-steerable antenna apparatus, systems and methods |
| WO2021155696A1 (en) * | 2020-02-04 | 2021-08-12 | 华为技术有限公司 | Multi-beam antenna |
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| US20020132581A1 (en) * | 2001-03-15 | 2002-09-19 | Nec Corporation | Information terminal apparatus having a variable directional antenna and control method thereof |
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| US20020036586A1 (en) * | 2000-09-22 | 2002-03-28 | Tantivy Communications, Inc. | Adaptive antenna for use in wireless communication systems |
| KR101172892B1 (en) * | 2008-12-18 | 2012-08-10 | 한국전자통신연구원 | Method and equipment for controlling radiation direction of small sector antenna |
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2013
- 2013-03-13 CN CN201310080677.6A patent/CN104051850A/en active Pending
-
2014
- 2014-03-07 WO PCT/IB2014/000570 patent/WO2014140791A1/en active Application Filing
- 2014-03-07 EP EP14728619.9A patent/EP2973867A1/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20020132581A1 (en) * | 2001-03-15 | 2002-09-19 | Nec Corporation | Information terminal apparatus having a variable directional antenna and control method thereof |
| CN101872894A (en) * | 2010-04-01 | 2010-10-27 | 电子科技大学 | Medium resonator antenna with reconfigurable directional diagram and phased array thereof |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716421B (en) * | 2015-04-08 | 2018-02-23 | 南开大学 | The reconfigurable antenna of PLC technology |
| CN104716421A (en) * | 2015-04-08 | 2015-06-17 | 南开大学 | Reconfigurable antenna in programmable control |
| CN107369910A (en) * | 2016-05-12 | 2017-11-21 | 上海贝尔股份有限公司 | Microstrip antenna and corresponding aerial array based on directional diagram diversity |
| CN107369910B (en) * | 2016-05-12 | 2020-11-27 | 上海诺基亚贝尔股份有限公司 | Microstrip antenna based on directional diagram diversity and corresponding antenna array |
| WO2018119911A1 (en) * | 2016-12-29 | 2018-07-05 | 深圳天珑无线科技有限公司 | Antenna having reconfigurable radiation pattern, and communication apparatus |
| WO2018137545A1 (en) * | 2017-01-27 | 2018-08-02 | Huawei Technologies Co., Ltd. | Reconfigurable radial-line slot antenna array |
| US10454184B2 (en) | 2017-01-27 | 2019-10-22 | Huawei Technologies Co., Ltd. | Reconfigurable radial-line slot antenna array |
| US10665946B2 (en) | 2017-08-16 | 2020-05-26 | Huawei Technologies Co., Ltd. | Antenna and communications device |
| EP3444897B1 (en) * | 2017-08-16 | 2023-02-15 | Huawei Technologies Co., Ltd. | Antenna and communications device |
| CN109411876B (en) * | 2017-08-16 | 2020-12-22 | 华为技术有限公司 | Antenna and communication equipment |
| CN109411876A (en) * | 2017-08-16 | 2019-03-01 | 华为技术有限公司 | A kind of antenna and communication equipment |
| CN111819734A (en) * | 2018-01-05 | 2020-10-23 | 维斯普瑞公司 | Beam-steerable antenna apparatus, systems and methods |
| CN110265792A (en) * | 2018-03-12 | 2019-09-20 | 杭州海康威视数字技术股份有限公司 | Antenna assembly and unmanned plane |
| CN108808223A (en) * | 2018-06-28 | 2018-11-13 | 袁涛 | Direction reconfigurable antenna |
| CN108987949A (en) * | 2018-07-26 | 2018-12-11 | 中国电建集团成都勘测设计研究院有限公司 | A kind of antenna system of restructural radiation mode |
| CN110474152A (en) * | 2019-07-26 | 2019-11-19 | 常熟市泓博通讯技术股份有限公司 | Antenna with eight modes |
| WO2021155696A1 (en) * | 2020-02-04 | 2021-08-12 | 华为技术有限公司 | Multi-beam antenna |
| US11909123B2 (en) | 2020-02-04 | 2024-02-20 | Huawei Technologies Co., Ltd. | Multibeam antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2973867A1 (en) | 2016-01-20 |
| WO2014140791A1 (en) | 2014-09-18 |
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Address after: 201206 Shanghai, Pudong Jinqiao Ning Bridge Road, No. 388, No. Applicant after: Shanghai NOKIA Baer Limited by Share Ltd Address before: 201206 Shanghai, Pudong Jinqiao Ning Bridge Road, No. 388, No. Applicant before: Shanghai Alcatel-Lucent Co., Ltd. |
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