EP2748893B1 - Antenna isolation using metamaterial - Google Patents

Antenna isolation using metamaterial Download PDF

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Publication number
EP2748893B1
EP2748893B1 EP12753577.1A EP12753577A EP2748893B1 EP 2748893 B1 EP2748893 B1 EP 2748893B1 EP 12753577 A EP12753577 A EP 12753577A EP 2748893 B1 EP2748893 B1 EP 2748893B1
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European Patent Office
Prior art keywords
metamaterial
array
unit cells
conductive track
conductive
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German (de)
English (en)
French (fr)
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EP2748893A1 (en
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Marc Harper
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Microsoft Technology Licensing LLC
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Microsoft Technology Licensing LLC
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials

Definitions

  • This invention relates to techniques for improving isolation between antennas by using metamaterials, to the metamaterials themselves, and to antenna devices comprising such metamaterials.
  • a metamaterial is an artificial material engineered to have properties that are not found in nature. Naturally occurring materials exhibit electromagnetic behaviour determined by their atomic and molecular structures. With metamaterials, the electromagnetic behaviour is modified by introducing structural features into the material that are smaller than the wavelength electromagnetic wave propagating through the material. Typically these features will have a size ⁇ /10 to ⁇ /20. In their simplest form, these structural features are distributed capacitive and inductive elements fabricated on a dielectric substrate such as FR4 (commonly used in printed circuit boards (PCBs)). More complex structures are possible and the use of discrete components, such as commercial capacitors, has also been explored.
  • PCBs printed circuit boards
  • Negative refractive index metamaterials can be constructed at microwave frequencies using arrays of electrically conductive elements engineered to have a suitable capacitance C and inductance L .
  • One of the earliest and most commonly used elements is the Split Ring Resonator (SRR) [ Pendry, J B.; AJ Holden, DJ Robbins, and WJ Stewart. "Magnetism from Conductors and Enhanced Nonlinear Phenomena" IEEE Trans. Microwave Theory Tech 47 (11): 2075-2084, 1999 ].
  • SRR element comprises two or more concentric rings, each having a split. The capacitance of each element arises from the close spacing between the concentric rings and the inductance from the thin printed traces used to create the rings.
  • metamaterials include those with split-ring resonator unit cells, as described, for example, in Moser, H O et al. ["Electromagnetic metamaterials over the whole THz range - achievements and perspectives"; ELECTROMAGNETIC MATERIALS Proceedings of the Symposium R, ICMAT 2005 (World Scientific Publishing Co.): 18 ].
  • MIMO Multiple Input, Multiple Output
  • Both diversity and MIMO systems require more than one antenna operating at the same time and on the same frequency and so good isolation between the antennas becomes important. Poor isolation leads to a loss of antenna efficiency because power from one antenna ends up in other antennas instead of being radiated. Poor isolation also leads to a loss of diversity and MIMO performance because the coupling between the antennas means they are not receiving sufficiently independent samples of the radio multipath environment.
  • a metamaterial comprising an array of unit cells each formed by at least one conductive track, wherein the at least one conductive track of at least one of the unit cells has a different length or width or thickness to the at least one conductive track of the other unit cells.
  • the metamaterial may comprise a 2D array of unit cells formed on or in a dielectric substrate.
  • the metamaterial may comprise a stack of 2D arrays of unit cells, each 2D array of unit cells formed on or in a respective dielectric substrate. At least one of the dielectric substrates in the stack may be made of a material having a different dielectric constant to at least one other of the dielectric substrates in the stack. This can help to improve the bandwidth over which the metamaterial provides isolation between two or more antennas.
  • the metamaterial may comprise a first 2D array of unit cells on a first surface of a dielectric substrate, and a second 2D array of unit cells on an opposed, second surface of the dielectric substrate. At least one further 2D array of unit cells may be formed as in interstitial layer within the dielectric substrate between the first and second 2D arrays.
  • the unit cells of at least one 2D array may each be formed by at least one conductive track having a different length or width or thickness to the at least one conductive track of the unit cells in at least one other 2D array. This can help to improve the bandwidth over which the metamaterial provides isolation between two or more antennas.
  • At least one and generally each unit cell may comprise at least one conductive track configured as a split-ring resonator.
  • the split-ring resonator may be symmetrical about a mirror plane, or may be asymmetrical in accordance with the invention.
  • asymmetrical denotes a split-ring resonator that does not have a mirror symmetry plane perpendicular to the plane of the conductive track.
  • Asymmetrical arrangements may provide isolation over a wider bandwidth than symmetrical arrangements.
  • At least one unit cell comprises first and second L-shaped conductive members disposed back-to-back in a plane with a gap between the members, and connected together by a perimetral conductive track that runs from an arm of the first L-shaped conductive member to an arm of the second L-shaped conductive member so as substantially to surround both L-shaped conductive members in the plane.
  • the L-shaped conductive members, the split-ring resonators and/or the perimetral conductive track are formed on a dielectric substrate, for example a printed circuit board (PCB) substrate such as Duroid® or FR4, or on a flexible plastics substrate such as that used for flexi-circuits.
  • the L-shaped conductive members, the split-ring resonators and/or the perimetral conductive track may be printed or formed on a dielectric substrate in the form of an adhesive tape, which can then be applied to a PCB substrate as required.
  • the perimetral conductive track may be generally rectangular in outline. Alternatively, generally circular, elliptical, oval or other polygonal outlines may be employed.
  • a gap may be defined in the perimetral conductive track corresponding to the gap between the back-to-back L-shaped conductive members.
  • the perimetral conductive track may be split between the two L-shaped members.
  • the perimetral conductive track is not split between the two L-shaped members, but forms a continuous perimeter.
  • the array of elements may be configured as an n x m array having a generally 2-D configuration.
  • the array of elements may be configured as an l x n x m array having a generally 3-D configuration.
  • several layers of metamaterial may be stacked on top of each other, with each layer having the same or different 2-D arrays of elements formed thereon.
  • the elements within any given array may be generally of the same shape and size. Alternatively, one or more elements within any given array may have slightly different sizes or shapes so that the elements are resonant at slightly different frequencies. According to the invention, one of the L-shaped conductive members in at least one of the elements is differently sized and/or shaped than the other L-shaped conductive member. These arrangements may help to improve bandwidth.
  • each array of elements it is not necessary for each array of elements to be a filled array. Indeed, one or more elements may be omitted from an array, and this has been found to improve the degree of isolation across a wider bandwidth. Moreover, it is possible to provide a degree of tuning by altering a position of one or more elements where space is made available through not filling the array. For example, an incompletely filled array may comprise a left hand column of two elements, a right hand column of two elements, and a middle column with only one element. By moving the element in the middle column up or down the column, the bandwidth of the metamaterial can be fine-tuned as required.
  • the metamaterial may be used to improve isolation between two or more antennas. This is of particular advantage in antenna systems using antenna diversity or MIMO technology, since these employ several antennas operating simultaneously within a small space.
  • Examples provide an antenna system comprising at least two antennas disposed on a substrate and a portion of metamaterial of the examples disposed between the at least two antennas.
  • a metamaterial comprising a dielectric substrate with first and second opposed surfaces, with a first pattern of elements formed on the first surface and a second pattern of elements formed on the second surface.
  • the first and second patterns of elements may be tuned to different frequencies or frequency bands, and the dual surface metamaterial, when disposed between a pair of dual-band antennas, can improve antenna isolation on both bands.
  • a similar result may be achieved by forming a first metamaterial comprising a dielectric substrate with a first pattern of elements, forming a second metamaterial comprising a dielectric substrate with a second pattern of elements, and then positioning the second metamaterial on top of the first metamaterial between a pair of antennas.
  • This principle may be extended to multiple metamaterial layers or surfaces so as to improve isolation between two antennas in several bands.
  • the metamaterial can also be used to improve isolation between several (more than two) antennas, including several antennas disposed in a co-planar fashion and in geometries other than co-planar.
  • the conductive structures of the metamaterial are printed or otherwise formed on one or both surfaces of a dielectric substrate material, for example FR4.
  • the conductive structures are printed or otherwise formed on an interstitial layer of dielectric substrate material, such as FR4.
  • FR4 dielectric substrate material
  • other common PCB substrate materials including Duroid®, may also be used. Multiple layers of dielectric substrate with the same or different dielectric constant may be used.
  • low or high dielectric constant materials typically in the range of 1 to 90 may be used as substrates for the metamaterial.
  • the novel metamaterial structure of certain embodiments can be used to increase the isolation between a pair of closely spaced antennas.
  • the metamaterial structure of some examples may be low cost as it can be printed on a layer of FR4, a low cost substrate material often use in the radio industry.
  • Some examples have a further advantage that, for dual band antennas and antenna arrangement, the metamaterial can be engineered to improve the isolation between both bands. This can be achieved by introducing an additional layer of dielectric substrate, printed with a different array of LC elements, above or below the first layer. Indeed, isolation between more bands is possible by introducing more layers.
  • Figure 1 shows two coplanar 2.4/5 GHz dual-band quarter-wave monopole antennas 1, 2 are closely spaced in a generally parallel arrangement on a PCB 3 comprising a dielectric substrate 4 with a conductive groundplane 5 over part of the substrate 4, and an area 6 free of groundplane 5 where the antennas 1, 2 are located.
  • the width of the PCB 3 is 20 mm and the antenna area 6 clear of groundplane 5 is 15 mm long.
  • the long lower portion 7 of the antenna is generally responsible for the radiation of 2.4 GHz and the elevated portions 1, 2 for the 5 GHz radiation.
  • the height of the antenna at its tallest part is 3.2 mm.
  • the monopole antennas 1, 2 are spaced only about ⁇ /6 apart and so the isolation between them is poor at around -6 dB, see Figure 2 .
  • the monopole antennas 1, 2 are electrically further apart, but even so, the worst-case the isolation remains poor at around -8 dB.
  • Opt. A Pure Appl. Opt. 11 085101, 2009 ], but here one L-shape is inverted with respect to the other and not back-to-back as described in the present application. It has been found advantageous to use an unfilled array of elements 8, as shown in Figure 3 , where an element 8 is absent at location 12. Removing an element has been found to improve bandwidth and moving the remaining centre element 13 (in this example) up and down may be used to tune the bandwidth to a particular application.
  • the metamaterial structure of Figure 3 provides good electromagnetic isolation at around 2.4 GHz.
  • FIG. 4 An alternative metamaterial design is shown in Figure 4 , and is tuned to the 5 GHz band.
  • a plurality of conductive LC elements 8' are printed on a single surface of FR4 substrate 9, but in the Figure 4 example, the elements 8' are conductively linked to each other and arranged as a pair of closely spaced columns. Other arrangments are possible.
  • a 5 GHz surface of the Figure 4 example can be mounted on top of and appropriately registered or aligned with a 2.4 GHz surface of the Figure 3 example, as shown in Figure 5 , to provide a dual-band metamaterial 14.
  • Figure 6 shows a complete structure of a pair of monopole antennas 1, 2 on a PCB 3, with a dual-band combined metamaterial 14 of Figure 5 disposed between the monopole antennas 1, 2.
  • the isolation between the antennas 1, 2 is improved in both bands, as shown in Figure 7 .
  • the isolation In the lower 2.4 GHz band the isolation has a very deep null and even at the band edges it is around -12 dB. This could be improved by careful tuning of the metamaterial 14 to put the null exactly in the centre of the band.
  • the isolation around 5 GHz In the high frequency band the isolation around 5 GHz is -20 dB. This notch may be moved to any part of the 4.9 - 5.9 GHz band by retuning the metamaterial 14.
  • the lower layer of the dual-band metamaterial 14 is an unfilled array and has one element missing in the centre column (see Figure 3 ). Moving the position of the element within the column, see Figure 8 , can be used to change the bandwidth of isolation in the 5GHz band without much affecting the isolation frequency of the 2.4 GHz. This effect is shown in Figure 9 .
  • the 2.4 GHz metamaterial has been shown as a 3x2 element array, whereas the 5 GHz metamaterial has been shown as a 2x3 array. It will be appreciated that other array configurations are possible with greater or smaller number of elements. It will also be appreciated that more than one array element may be removed to tune the bandwidth of the isolation effect.
  • FR4 has been used as the substrate material.
  • substrate material Many other types may be used including low and high dielectric materials.
  • the beneficial characteristics of a metamaterial improve with increasing numbers of elements in the array.
  • the use of a high dielectric substrate may be used to shrink the element size and allow more elements to be used in the array.
  • n-band metamaterials can be created using n-layer substrates.
  • isolation between two antennas has been described in the exemplary arrangement above, isolation between greater numbers is possible by suitably disposing metamaterial elements between all the pairs.
  • the exemplary arrangement above describes two coplanar antennas, but the metamaterial described may also be used to improve isolation between antennas disposed using other geometries.
  • Figure 10 shows a metamaterial comprising a 2D array of split-ring resonators 8 on a dielectric substrate 9 with one or more of the split-ring resonators 8 having a different size to the others. This may help to provide isolation over a wider bandwidth.
  • Figure 11 shows a metamaterial comprising a 2D array of split-ring resonators 8 on a dielectric substrate 9 with one or more of the split-ring resonators 8 having a different shape to the others. This may help to provide isolation over a wider bandwidth.
  • Figure 12 shows a metamaterial comprising a 2D array of split-ring resonators 8 having a first configuration on one surface of a dielectric substrate 9, and a 2D array of split-ring resonators 8' having a second, different configuration on the other surface of the dielectric substrate 9. This may help to provide isolation over a wider bandwidth.
  • Figure 13 shows a metamaterial comprising a 2D array of split-ring resonators 8 having a first configuration on one surface of a dielectric substrate 9, a 2D array of split-ring resonators 8' having a second, different configuration on the other surface of the dielectric substrate 9, and an interstitial 2D array of split-ring resonators 8" having a third, different configuration between the surfaces of the dielectric substrate 9. This may help to provide isolation over a wider bandwidth.

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GBGB1114625.5A GB201114625D0 (en) 2011-08-24 2011-08-24 Antenna isolation using metamaterial
PCT/GB2012/052010 WO2013027029A1 (en) 2011-08-24 2012-08-16 Antenna isolation using metamaterial

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EP (1) EP2748893B1 (enrdf_load_stackoverflow)
JP (1) JP2014527366A (enrdf_load_stackoverflow)
KR (1) KR101944568B1 (enrdf_load_stackoverflow)
CN (1) CN103999286B (enrdf_load_stackoverflow)
GB (2) GB201114625D0 (enrdf_load_stackoverflow)
TW (1) TWI590523B (enrdf_load_stackoverflow)
WO (1) WO2013027029A1 (enrdf_load_stackoverflow)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9837710B2 (en) 2012-10-15 2017-12-05 The Penn State Research Foundation Broadband monopole antenna using anisotropic metamaterial coating
CN104466401B (zh) * 2013-09-25 2019-03-12 中兴通讯股份有限公司 多天线终端
CN104701624B (zh) * 2015-03-03 2018-03-06 南京邮电大学 一种新型紧凑型的双频段mimo天线
CN105006642A (zh) * 2015-06-26 2015-10-28 桂林电子科技大学 单负材料隔离板及宽频高隔离度单极子阵列天线
CN105006649A (zh) * 2015-06-30 2015-10-28 厦门大学 一种电磁波近场隔离屏及其应用
CN105006650B (zh) * 2015-07-30 2018-03-09 中天宽带技术有限公司 一种基于光子晶体的双极化基站天线
TWI608656B (zh) * 2016-05-17 2017-12-11 Slot antenna with complementary split ring
CN106876982B (zh) * 2017-02-22 2021-08-06 西安电子科技大学 改善多天线系统性能的超表面及采用超表面的多天线系统
KR102008284B1 (ko) 2017-03-29 2019-08-07 주식회사 케이원 식품소스 공급장치
WO2018236202A1 (fr) * 2017-04-28 2018-12-27 Emsi Rabat Dispositif de protection du corps humain et des équipements contre le rayonnement électromagnétique
GB201708242D0 (en) 2017-05-23 2017-07-05 Univ Bradford Radiation shield
CN107069207A (zh) * 2017-05-26 2017-08-18 南京信息工程大学 一种基于人工电磁超材料去耦的mimo天线
CN107785661A (zh) * 2017-10-18 2018-03-09 哈尔滨工程大学 一种基于双频超材料的去耦合阵列天线
CN107968262B (zh) * 2017-11-23 2021-03-19 广东通宇通讯股份有限公司 一种阵列天线及天线隔离组件
KR101957798B1 (ko) * 2018-01-17 2019-03-13 중앙대학교 산학협력단 메타물질 흡수체
CN108511918B (zh) * 2018-03-13 2020-08-28 东北石油大学 基于超材料的电磁波非对称传输控制器
US10854986B2 (en) 2018-07-18 2020-12-01 Samsung Electro-Mechanics Co., Ltd. Antenna apparatus
CN109638440B (zh) * 2018-12-19 2020-05-12 电子科技大学 一种基于超材料的5g通信小型化宽频带mimo天线
US12313570B2 (en) 2019-03-27 2025-05-27 Lyten, Inc. Leaky coaxial resonant sensor systems and methods
US12317466B2 (en) 2019-03-27 2025-05-27 Lyten, Inc. Frequency selective metamaterial for protective enclosures
US11965803B2 (en) * 2019-03-27 2024-04-23 Lyten, Inc. Field deployable resonant sensors
US12270785B2 (en) 2019-03-27 2025-04-08 Lyten, Inc. Water droplet sensing systems and methods
US12339272B2 (en) 2019-03-27 2025-06-24 Lyten, Inc. Sensors incorporated into building materials to detect physical characteristic changes
US12196636B2 (en) 2019-03-27 2025-01-14 Lyten, Inc. Sensors incorporated into airborne vehicle components to detect physical characteristic changes
US12265058B2 (en) 2019-03-27 2025-04-01 Lyten, Inc. Sensors incorporated into adhesive material
KR102207150B1 (ko) 2019-06-26 2021-01-25 삼성전기주식회사 안테나 장치
CN112510366A (zh) * 2020-10-19 2021-03-16 西安朗普达通信科技有限公司 一种级联式去耦芯片
CN112382859A (zh) * 2020-10-31 2021-02-19 华南理工大学 一种双电容太赫兹超材料电调控器件结构
CN112968292B (zh) * 2021-02-07 2022-09-16 北京邮电大学 可调太赫兹器件及可调天线
CN113964490B (zh) * 2021-09-17 2022-10-25 华南理工大学 一种宽带双极化电磁透明天线
TWI800065B (zh) 2021-10-29 2023-04-21 明泰科技股份有限公司 週期性金屬陣列結構
US12103417B2 (en) 2021-11-15 2024-10-01 Toyota Motor Engineering & Manufacturing North America, Inc. Metamaterial panel for enhancing wireless charging of electric vehicles
TWI838815B (zh) 2022-08-08 2024-04-11 啟碁科技股份有限公司 天線模組、超材料結構及電子裝置
US20240280526A1 (en) 2023-02-15 2024-08-22 Lyten, Inc. Method of field recalibration of multivariate analyte sensors based on learned precise sensing fingerprints
WO2024241881A1 (ja) * 2023-05-19 2024-11-28 京セラ株式会社 電波制御板

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01149503A (ja) * 1987-12-07 1989-06-12 Nippon Telegr & Teleph Corp <Ntt> リング型周波数選択板
GB0130513D0 (en) * 2001-12-20 2002-02-06 Univ Southampton Device for changing the polarization state of reflected transmitted and diffracted light and for achieving frequency and polarization sensitive reflection and
US6933895B2 (en) * 2003-02-14 2005-08-23 E-Tenna Corporation Narrow reactive edge treatments and method for fabrication
US20050104678A1 (en) * 2003-09-11 2005-05-19 Shahrooz Shahparnia System and method for noise mitigation in high speed printed circuit boards using electromagnetic bandgap structures
US7205941B2 (en) * 2004-08-30 2007-04-17 Hewlett-Packard Development Company, L.P. Composite material with powered resonant cells
US7830310B1 (en) * 2005-07-01 2010-11-09 Hrl Laboratories, Llc Artificial impedance structure
CN100372172C (zh) * 2005-07-01 2008-02-27 清华大学 用于多输入多输出通信系统移动终端的平面四天线系统
US7760140B2 (en) * 2006-06-09 2010-07-20 Intel Corporation Multiband antenna array using electromagnetic bandgap structures
US7733289B2 (en) * 2007-10-31 2010-06-08 The Invention Science Fund I, Llc Electromagnetic compression apparatus, methods, and systems
US7570432B1 (en) * 2008-02-07 2009-08-04 Toyota Motor Engineering & Manufacturing North America, Inc. Metamaterial gradient index lens
US9116302B2 (en) * 2008-06-19 2015-08-25 Ravenbrick Llc Optical metapolarizer device
JP5112204B2 (ja) * 2008-07-15 2013-01-09 原田工業株式会社 アンテナエレメント間の相互結合を抑制可能なアンテナ装置
US7773033B2 (en) * 2008-09-30 2010-08-10 Raytheon Company Multilayer metamaterial isolator
JP2010103609A (ja) * 2008-10-21 2010-05-06 Olympus Corp 電磁波伝搬媒質
CN201611683U (zh) * 2008-11-20 2010-10-20 深圳大鹏光启科技有限公司 一种射频芯片小天线
KR101262519B1 (ko) * 2009-01-21 2013-05-08 라벤브릭 엘엘씨 광학 메타편광자 장치
KR101202339B1 (ko) * 2009-04-29 2012-11-16 한국전자통신연구원 메타물질 상판덮개를 이용한 이득향상과 빔 성형이 동시에 가능한 안테나
TWI420739B (zh) * 2009-05-21 2013-12-21 Ind Tech Res Inst 輻射場型隔離器及其天線系統與使用該天線系統的通訊裝置
WO2012126249A1 (zh) * 2011-03-18 2012-09-27 深圳光启高等理工研究院 一种实现电磁波偏折的超材料
EP2518824A1 (en) * 2011-04-27 2012-10-31 Research In Motion Limited Multiple antenna assembly utilizing electromagnetic band gap isolation structures

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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TW201320467A (zh) 2013-05-16
KR20140050684A (ko) 2014-04-29
CN103999286B (zh) 2016-10-26
KR101944568B1 (ko) 2019-01-31
CN103999286A (zh) 2014-08-20
GB201114625D0 (en) 2011-10-05
JP2014527366A (ja) 2014-10-09
TWI590523B (zh) 2017-07-01
GB201214655D0 (en) 2012-10-03
WO2013027029A1 (en) 2013-02-28
GB2495365A (en) 2013-04-10
EP2748893A1 (en) 2014-07-02

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