WO2011136576A2 - 아이솔레이션 향상을 위한 mimo 안테나 - Google Patents
아이솔레이션 향상을 위한 mimo 안테나 Download PDFInfo
- Publication number
- WO2011136576A2 WO2011136576A2 PCT/KR2011/003138 KR2011003138W WO2011136576A2 WO 2011136576 A2 WO2011136576 A2 WO 2011136576A2 KR 2011003138 W KR2011003138 W KR 2011003138W WO 2011136576 A2 WO2011136576 A2 WO 2011136576A2
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- WIPO (PCT)
- Prior art keywords
- radiator
- ground plane
- coupling member
- coupled
- signal
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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
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
Definitions
- the present invention relates to a built-in antenna, and more particularly to a built-in antenna for improving the isolation characteristics for preventing the interference between the antenna.
- the proposed technique is a MIMO antenna technology according to such a necessity.
- MIMO antenna technology uses spatial multiplexing to transmit data at higher speeds without increasing the bandwidth of the system by simultaneously transmitting different data using multiple antennas to the transmitter or receiver.
- the MIMO antenna has an array antenna structure using a plurality of radiators, and since a plurality of radiators are used, interference between radiators may occur. Such interference may distort the radiation pattern or cause mutual coupling between the radiators.
- an isolation element such as a separate structure or a structure that spaces the distance between radiators is used.
- the isolation method studied up to now can secure the desired isolation only when the distance between the two antennas is sufficiently secured even if a separate isolation element is used.
- the present invention provides a MIMO antenna capable of ensuring good isolation characteristics even when the distance between multiple antennas is set relatively close.
- the dielectric structure A ground plane provided in the first layer of the dielectric structure; A first radiator electromagnetically coupled with a first feed point and radiating a first RF signal and coupled with the ground plane; A second radiator electromagnetically coupled to a second feed point and radiating a second RF signal and coupled to the ground plane; And a connection line coupled to a predetermined point of the first radiator and a predetermined point of the second radiator to connect the first radiator and the second radiator to provide a MIMO antenna for improving isolation.
- the first RF signal and the second RF signal are the same frequency signal.
- the length of the connection line may be set to ⁇ / 4 of the use frequencies of the first radiator and the second radiator.
- the antenna may further include a coupling member coupled to the second layer of the dielectric structure and overlapping the ground plane.
- the first end of the coupling member is adjacent to the engagement portion of the first radiator and the ground plane and the second end of the coupling member is adjacent to the engagement portion of the second radiator and the ground plane.
- the coupling member has a size capable of emitting radiation frequencies of the first radiator and the second radiator.
- the dielectric structure A ground plane provided in the first layer of the dielectric structure; A first radiator electromagnetically coupled with a first feed point and radiating a first RF signal and coupled with the ground plane; A second radiator electromagnetically coupled to a second feed point and radiating a second RF signal and coupled to the ground plane; And a coupling member coupled to the second layer of the dielectric structure, the coupling member overlapping the ground plane.
- the isolation characteristics between the multiple antennas can be improved, and even if the distance between the multiple antennas is set relatively close, there is an advantage of ensuring good isolation characteristics.
- FIG. 1 is a perspective view of a MIMO antenna for improving isolation according to an embodiment of the present invention.
- FIG. 2 is a bottom plan view of a MIMO antenna for improving isolation according to an embodiment of the present invention.
- FIG 3 is a top plan view of a MIMO antenna for improving isolation according to an embodiment of the present invention.
- FIG. 1 is a diagram showing a perspective view of a MIMO antenna for improving the isolation according to an embodiment of the present invention
- Figure 2 is a view showing a top plan view of the MIMO antenna for improving the isolation according to an embodiment of the present invention
- 3 is a bottom plan view of a MIMO antenna for improving isolation according to an embodiment of the present invention.
- a MIMO antenna for improving isolation includes a first radiator 100, a second radiator 102, a first feed point 104, and a second feed point.
- 106 connection line 108, dielectric structure 200, ground plane 202, and coupling member 204.
- the dielectric structure 200 serves as a body to which the ground plane 202 and the coupling member 204 are coupled.
- a substrate such as a printed circuit board (PCB) may be used, and it will be apparent to those skilled in the art that various kinds of dielectric structures may be used.
- PCB printed circuit board
- the ground plane 202 is formed under the dielectric structure 200 and is made of a metal material and maintains an electrically grounded state.
- the first radiator 100 receives a signal through the first feed point 104 and emits a first RF signal.
- 1 illustrates a structure in which the first radiator 100 extends in the same plane as the dielectric structure 200.
- the first radiator 100 may be formed perpendicular to the dielectric structure 200.
- the first radiator 100 is connected to the first feed point 104 and also electrically coupled to the ground plane 202. That is, the first radiator 100 has a feeding structure of a Planar Inverted F Antenna (PIFA) antenna that is connected with the feeding point 104 and the ground plane 202.
- PIFA Planar Inverted F Antenna
- the inner conductor of the coaxial cable may be coupled to the first feed point 104 and the outer core of the coaxial cable may be coupled to the ground plane 202.
- the shape of the first radiator 100 shown in Figure 1 is merely exemplary, it will be apparent to those skilled in the art that it can have a variety of forms as long as it satisfies the electrical length for the resonance of the RF signal.
- the second radiator 102 receives a signal through the second feed point 106 and emits a second RF signal.
- 1 illustrates a structure in which the second radiator 102 extends in the same plane as the dielectric structure 200.
- the second radiator 102 may be formed perpendicular to the dielectric structure 200.
- the second radiator 102 also has a PIFA feeding structure connected to the second feed point 106 and electrically coupled to the ground plane 202.
- the shape of the second radiator 102 shown in FIG. 1 is also merely exemplary, and it will be apparent to those skilled in the art that it may have various forms as long as it satisfies the electrical length for resonance of the RF signal.
- the shape of the second radiator 102 is the same as that of the first radiator, but the shape of the second radiator need not be the same as that of the first radiator.
- the antenna of the present invention is a MIMO antenna, the first RF signal radiated from the first radiator 100 and the second RF signal radiated from the second radiator 102 are different signals fed independently, and the frequency of the two signals is same.
- interference may occur between the two radiators.
- Such interference acts as a major factor in performance degradation of the MIMO antenna.
- the present invention proposes a configuration for suppressing interference occurring between two adjacent radiators through the connecting line 108 and the coupling member 204.
- connection line 108 is coupled to a predetermined point of the first radiator 100 and the second radiator 102 to electrically connect the first radiator 100 and the second radiator 102.
- the connecting line 108 has a length corresponding to ⁇ / 4 of the use frequencies of the first radiator 100 and the second radiator 102.
- the connecting line 108 has a length of ⁇ / 4 of the operating frequency so that the path from the first radiator to the second radiator and the path from the second radiator to the first radiator appear to be electromagnetically blocked. The interference between the radiators can be suppressed.
- connection line 108 having a length of ⁇ / 4 has an advantage in that interference between radiators can be suppressed with a relatively simple structure even when both radiators are relatively adjacent to each other.
- the coupling member 204 provided on top of the dielectric structure 200 acts as another component for suppressing interference between two radiators. 1 to 3, the ground plane 202 is shown below the dielectric structure 200 and the coupling member 204 is located on top of the dielectric structure 200, but is coupled with the ground plane 202.
- the ring member 204 need only be located at different layers, and the positional relationship between the top and the bottom may be changed as necessary.
- the ground is commonly shared by the ground of the terminal, and inter-radiator interference may occur through the shared ground plane 202, and the coupling member 204 may be formed by the ground plane 202. Suppresses inter-radiator interference.
- the coupling member 204 is positioned at a portion overlapping with the ground plane 202 up and down, and a first end of both ends of the coupling member 204 is a coupling portion of the ground plane 202 of the first radiator 100. And a second one of both ends of the coupling member 204 is adjacent to the engagement portion of the second radiator 102 and the ground plane 202.
- the size of the coupling member 204 is the first radiator and
- Coupling member 204 causes a coupling between ground plane 202 and coupling member 204 to form a coupling, such coupling being ground plane 202 corresponding to the frequency of use of the first and second radiators.
- the mutual interference between both radiators is suppressed by canceling the surface current of the surface.
- the coupling member 204 may be interpreted as an inductance component in the circuit, and the space between the coupling member 204 and the ground plane 202 may be interpreted as a capacitance component.
- the space where the coupling member 204 and the ground plane 202 overlap can be interpreted as a kind of bandstop filter in which the inductor and capacitor are connected in parallel, and the surface at a particular frequency due to the addition of the coupling member 204. It is possible to cut off the current.
- FIG. 1 shows another dielectric structure 250 to which the dielectric structure 200 and the radiators 100 and 102 are coupled, the dielectric structure 250 may not be provided as necessary.
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Abstract
Description
Claims (12)
- 유전체 구조물;상기 유전체 구조물의 제1 레이어에 구비되는 접지면;제1 급전점과 전자기적으로 결합되며 제1 RF 신호를 방사하고 상기 접지면과 결합되는 제1 방사체;제2 급전점과 전자기적으로 결합되며 제2 RF 신호를 방사하고 상기 접지면과 결합되는 제2 방사체; 및상기 제1 방사체의 소정 지점 및 상기 제2 방사체의 소정 지점과 결합되어 상기 제1 방사체 및 상기 제2 방사체를 연결하는 연결 라인을 포함하는 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나.
- 제1항에 있어서,상기 제1 RF 신호 및 상기 제2 RF 신호는 동일 주파수 신호인 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나.
- 제2항에 있어서,상기 연결 라인의 길이는 제1 방사체 및 제2 방사체의 사용 주파수의 λ/4인 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나.
- 제1항에 있어서,상기 유전체 구조물의 제2 레이어에 결합되며, 상기 접지면과 상하로 오버랩되는 커플링 부재를 더 포함하는 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나.
- 제4항에 있어서,상기 커플링 부재의 제1 단은 상기 제1 방사체 및 상기 접지면의 결합 부분과 인접하고 상기 커플링 부재의 제2 단은 상기 제2 방사체 및 상기 접지면의 결합 부분에 인접하는 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나.
- 제4항에 있어서,상기 커플링 부재는 상기 제1 방사체 및 상기 제2 방사체의 방사 주파수를 방사할 수 있는 사이즈를 가지는 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나.
- 유전체 구조물;상기 유전체 구조물의 제1 레이어에 구비되는 접지면;제1 급전점과 전자기적으로 결합되며 제1 RF 신호를 방사하고 상기 접지면과 결합되는 제1 방사체;제2 급전점과 전자기적으로 결합되며 제2 RF 신호를 방사하고 상기 접지면과 결합되는 제2 방사체; 및상기 유전체 구조물의 제2 레이어에 결합되며, 상기 접지면과 상하로 오버랩되는 커플링 부재를 포함하는 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나.
- 제7항에 있어서,상기 커플링 부재의 제1 단은 상기 제1 방사체 및 상기 접지면의 결합 부분과 인접하고 상기 커플링 부재의 제2 단은 상기 제2 방사체 및 상기 접지면의 결합 부분에 인접하는 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나
- 제7항에 있어서,상기 커플링 부재는 상기 제1 방사체 및 상기 제2 방사체의 방사 주파수를 방사할 수 있는 사이즈를 가지는 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나.
- 제7항에 있어서,상기 제1 방사체의 소정 지점 및 상기 제2 방사체의 소정 지점과 결합되어 상기 제1 방사체 및 상기 제2 방사체를 연결하는 연결 라인을 더 포함하는 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나.
- 제10항에 있어서,상기 제1 RF 신호 및 상기 제2 RF 신호는 동일 주파수 신호인 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나.
- 제11항에 있어서,상기 연결 라인의 길이는 제1 방사체 및 제2 방사체의 사용 주파수의 λ/4인 것을 특징으로 하는 아이솔레이션 향상을 위한 MIMO 안테나.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/643,987 US9196957B2 (en) | 2010-04-28 | 2011-04-28 | MIMO antenna for improved isolation |
CN201180020734.0A CN102934283B (zh) | 2010-04-28 | 2011-04-28 | 为提高隔离性的多入多出天线 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR10-2010-0039611 | 2010-04-28 | ||
KR1020100039611A KR101102650B1 (ko) | 2010-04-28 | 2010-04-28 | 아이솔레이션 향상을 위한 mimo 안테나 |
Publications (2)
Publication Number | Publication Date |
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WO2011136576A2 true WO2011136576A2 (ko) | 2011-11-03 |
WO2011136576A3 WO2011136576A3 (ko) | 2012-01-05 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2011/003138 WO2011136576A2 (ko) | 2010-04-28 | 2011-04-28 | 아이솔레이션 향상을 위한 mimo 안테나 |
Country Status (4)
Country | Link |
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US (1) | US9196957B2 (ko) |
KR (1) | KR101102650B1 (ko) |
CN (1) | CN102934283B (ko) |
WO (1) | WO2011136576A2 (ko) |
Families Citing this family (19)
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KR20130134658A (ko) * | 2012-05-31 | 2013-12-10 | 삼성전자주식회사 | 방사체 분리형 안테나 장치 |
US9774079B2 (en) * | 2014-04-08 | 2017-09-26 | Microsoft Technology Licensing, Llc | Capacitively-coupled isolator assembly |
CN104157987A (zh) * | 2014-06-13 | 2014-11-19 | 电子科技大学 | 一种小型化mimo超宽带天线 |
WO2016138650A1 (en) * | 2015-03-04 | 2016-09-09 | Huawei Technologies Co.,Ltd. | Multiple input multiple output wireless antenna structures and communication device |
TWI587579B (zh) * | 2015-03-05 | 2017-06-11 | 智易科技股份有限公司 | 多輸入多輸出天線 |
CN106033833A (zh) * | 2015-03-13 | 2016-10-19 | 智易科技股份有限公司 | 多输入多输出天线 |
KR101743920B1 (ko) * | 2015-12-31 | 2017-06-08 | 인천대학교 산학협력단 | 이동체의 두꺼운 금속면 상의 표면전류와 자기장을 억제하여 탑재용 다중 안테나간의 격리도를 향상시키는 메타물질 기반 장치 |
US10270162B2 (en) | 2016-09-23 | 2019-04-23 | Laird Technologies, Inc. | Omnidirectional antennas, antenna systems, and methods of making omnidirectional antennas |
CN106252882A (zh) * | 2016-09-29 | 2016-12-21 | 深圳市信维通信股份有限公司 | 一种耦合寄生低剖面高隔离度mimo天线 |
JP6874368B2 (ja) * | 2016-12-28 | 2021-05-19 | 富士通株式会社 | 電子機器 |
TWI617086B (zh) * | 2017-03-02 | 2018-03-01 | 和碩聯合科技股份有限公司 | 無線通訊裝置 |
CN108736148B (zh) * | 2017-04-17 | 2020-01-31 | 华为技术有限公司 | 天线装置与电子设备 |
CN107919526B (zh) * | 2017-10-13 | 2020-09-18 | 瑞声科技(南京)有限公司 | 天线系统及移动终端 |
TW201919283A (zh) | 2017-11-09 | 2019-05-16 | 宏碁股份有限公司 | 行動裝置 |
US20190319346A1 (en) * | 2018-04-13 | 2019-10-17 | Honeywell International Inc. | Circuit board antenna structures and systems |
US10957985B2 (en) * | 2018-09-28 | 2021-03-23 | Apple Inc. | Electronic devices having antenna module isolation structures |
KR102529052B1 (ko) * | 2019-06-12 | 2023-05-03 | 삼성전기주식회사 | 안테나 장치 |
CN110518339B (zh) * | 2019-08-23 | 2024-10-18 | 信维创科通信技术(北京)有限公司 | 低频天线结构及移动设备 |
CN111555019B (zh) * | 2020-05-20 | 2022-07-12 | 维沃移动通信有限公司 | 电子设备 |
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2010
- 2010-04-28 KR KR1020100039611A patent/KR101102650B1/ko active IP Right Grant
-
2011
- 2011-04-28 US US13/643,987 patent/US9196957B2/en not_active Expired - Fee Related
- 2011-04-28 CN CN201180020734.0A patent/CN102934283B/zh not_active Expired - Fee Related
- 2011-04-28 WO PCT/KR2011/003138 patent/WO2011136576A2/ko active Application Filing
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KR20060114062A (ko) * | 2005-04-27 | 2006-11-06 | 주식회사 팬택앤큐리텔 | 다중 주파수 대역 내장형 안테나 |
KR20090038724A (ko) * | 2007-10-16 | 2009-04-21 | 한양대학교 산학협력단 | 다중 대역 무선 랜 안테나 |
KR20090039103A (ko) * | 2007-10-17 | 2009-04-22 | 삼성전자주식회사 | Mimo 안테나 장치 |
KR20100030522A (ko) * | 2008-09-10 | 2010-03-18 | (주)에이스안테나 | 전자기적 커플링을 이용한 다중 대역 안테나 |
Also Published As
Publication number | Publication date |
---|---|
CN102934283A (zh) | 2013-02-13 |
US9196957B2 (en) | 2015-11-24 |
KR101102650B1 (ko) | 2012-01-04 |
US20130135168A1 (en) | 2013-05-30 |
KR20110120090A (ko) | 2011-11-03 |
WO2011136576A3 (ko) | 2012-01-05 |
CN102934283B (zh) | 2015-03-18 |
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