WO2011087177A1 - Antenne interne mimo a auxiliaire d'isolation - Google Patents

Antenne interne mimo a auxiliaire d'isolation Download PDF

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Publication number
WO2011087177A1
WO2011087177A1 PCT/KR2010/000652 KR2010000652W WO2011087177A1 WO 2011087177 A1 WO2011087177 A1 WO 2011087177A1 KR 2010000652 W KR2010000652 W KR 2010000652W WO 2011087177 A1 WO2011087177 A1 WO 2011087177A1
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WO
WIPO (PCT)
Prior art keywords
antenna element
antenna
isolation aid
isolation
aid
Prior art date
Application number
PCT/KR2010/000652
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English (en)
Korean (ko)
Inventor
이상운
이진우
이문수
Original Assignee
주식회사 가람솔루션
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 주식회사 가람솔루션 filed Critical 주식회사 가람솔루션
Publication of WO2011087177A1 publication Critical patent/WO2011087177A1/fr

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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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in 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 system, and more particularly to a micro MIMO antenna provided in an electronic device that prevents interference between antenna elements through the isolation aid.
  • the proposed technology is an antenna technology using MIMO (Multi-Input Multi-Output) or diversity, which has recently been in the spotlight.
  • MIMO Multi-Input Multi-Output
  • diversity which has recently been in the spotlight.
  • the antenna refers to a component that first converts an electrical signal into a predetermined electromagnetic wave to radiate to a free space or vice versa.
  • the shape of the effective area where the antenna can radiate or sense electromagnetic waves is generally called a radiation pattern.
  • the MIMO scheme is a multiple input multiple output scheme in which data is transmitted through multiple paths by increasing the number of antennas of a base station and a mobile terminal to two or more, and a signal received through each path at a receiving end.
  • the MIMO antenna can increase the reliability of the transmitted data and can overcome the limitation of the mobile communication amount due to the expansion of the data communication.
  • a mutual interference between antenna elements is formed by forming a shielding wall having a three-dimensional structure between the arranged multiple antennas to block coupling between antenna conductors. It has been proposed to minimize this.
  • the formation of the barrier film causes an increase in the total volume of the antenna, difficulties in manufacturing, and high manufacturing costs.
  • the present invention has been made to solve the above problems, while providing a built-in MIMO antenna that can minimize the mutual interference that can occur between the antenna while miniaturizing the structure to implement the antenna array in a narrow internal space Its purpose is to.
  • the built-in MIMO antenna having an isolation aid according to the present invention, the first antenna element; A second antenna element; And a fork isolation aid positioned between the first antenna element and the second antenna element and grounded to a predetermined ground portion.
  • the isolation aid comprises a plurality of strip lines arranged in parallel with each other, a strip connection portion connecting the plurality of strip lines to each other, and a ground portion for grounding the strip connection portion to the predetermined ground portion.
  • the plurality of strip lines may be arranged in parallel with the first antenna element and the second antenna element, and include three strip lines.
  • the isolation aid reflects electromagnetic waves emitted from the first antenna element and the second antenna element to have maximum directivity in the opposite direction of the isolation aid, it is preferable to cancel the interference phenomenon between the antennas.
  • first antenna element and the second antenna element it is preferable to further include a feeder connected to the power supply circuit is connected to the signal circuit, further comprising a connection grounding portion connected to the predetermined grounding portion to ground. .
  • the isolation aid absorbs currents induced from the first antenna element and the second antenna element, isolates currents mutually induced from each other, and inductance component along the length of the conductor line of the isolation aid. It is preferable to perform the operation of the band reject filter by using the parallel resonance phenomenon caused by the capacitance component according to the distance between the first antenna element and the second antenna element and the distance between the plurality of conductor lines of the isolation aid. Do.
  • the isolation aid is composed of three strip lines, the capacitance component according to the separation distance from the first antenna element Cg1, the capacitance component according to the separation distance from the second antenna element Cg2, the first strip
  • the capacitance component according to the separation distance between the line and the second strip line is Ciag1
  • the capacitance component according to the separation distance between the second strip line and the third strip line is called Ciag2
  • the inductance component according to the length of the three strip lines Are denoted as Lig1, Lig2, and Lig3, respectively
  • a frequency band for canceling the interference between the first and second antenna elements is f BSP , it is preferable to design the following equation.
  • the first antenna element and the second antenna element are symmetrically positioned about the isolation aid, and each has a total length of ⁇ / 4. Is the wavelength of the radio wave output from the antenna element.
  • the first antenna element, the second antenna element and the isolation aid is formed through a metal press, FPCB, Pad printing, In molding and Sputtering process, it is preferable to form and fix on the antenna frame made of insulating resin Do.
  • the power supply unit is made of C-clip and Vogo-pin and connected or coupled to the signal circuit.
  • fork-shaped isolation aids are disposed between the antenna elements, thereby minimizing mutual interference between the antennas in a limited space, thereby miniaturizing the entire MIMO antenna and having high isolation characteristics even at a wide bandwidth. It provides an effect that can be secured to prevent degradation of the antenna characteristics.
  • the isolation aid it is possible to effectively design the isolation aid to act as a frequency band blocking filter between the antenna elements, thereby providing an effect of more effectively and actively blocking the interference between the antennas.
  • FIG. 1 is a perspective view showing the configuration of a built-in MIMO antenna having an isolation aid according to an embodiment of the present invention.
  • FIG. 2 is a view showing a planar shape of a built-in MIMO antenna having an isolation aid according to an embodiment of the present invention.
  • 3 is a graph showing the return loss and isolation characteristics for the MIMO antenna without isolation aid.
  • 4 and 5 are graphs showing return loss characteristics, isolation characteristics, and efficiency characteristics of a built-in MIMO antenna having an isolation aid according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating a distribution of currents flowing on a surface of a built-in MIMO antenna having an isolation aid according to an embodiment of the present invention.
  • FIG. 7 illustrates a 3D radiation pattern of a built-in MIMO antenna having an isolation aid according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram showing a configuration in which a built-in MIMO antenna having an isolation aid according to an embodiment of the present invention is formed inside a device case.
  • FIG. 1 is a perspective view showing a configuration of a built-in MIMO antenna having an isolation aid according to an embodiment of the present invention
  • Figure 2 is a plan view of a built-in MIMO antenna having an isolation aid according to an embodiment of the present invention Drawing.
  • the built-in MIMO antenna according to the present invention includes a first antenna element 110, a second antenna element 120 and the isolation aid 130 formed on the antenna frame 100 for fixing the antenna pattern.
  • the antenna frame 100 may be a substrate made of an insulating resin, or an insulating frame formed in an inner case of a mobile phone.
  • the antenna frame 100 may have a rectangular shape with a protruding surface.
  • the antenna frame 100 may be manufactured to have a volume of 0.36 cc with a size of 15 ⁇ 8 ⁇ 3 mm 3 using polycarbonate having a relative dielectric constant of 2.9 and a dielectric loss of 0.02. . This enables the implementation of a small sized built-in MIMO antenna that can be mounted in a compact terminal.
  • the first antenna element 110 and the second antenna element 120 are formed on the antenna frame 100 and are connected to a power supply unit 140 and a ground 200 that receive a high frequency signal from a signal circuit and are grounded. It is provided with a ground portion 150.
  • the first antenna element 110 and the second antenna element 120 are formed on the antenna frame 100 so as to be symmetrical with respect to the isolation aid 130 to be described later.
  • the first and second antenna elements 110 and 120 respectively receive a predetermined high frequency signal from an external signal circuit through a power supply unit 140 to radiate electromagnetic waves.
  • the power supply unit 140 consisting of C-clip and Vogo-pin is connected to or coupled to the signal circuit.
  • the isolation aid 130 is formed on the antenna frame 100 between the first antenna element 110 and the second antenna element 120, and consists of a strip line divided into several branches. Preferably, the isolation aid 130 is formed by forking three strip lines divided into three forks. In addition, the isolation aid 130 includes a ground part 150 connected to the ground 200 and grounded. That is, the isolation aid 130 includes three strip lines arranged in parallel with each other, a connection part connecting the three strip lines to each other, and the ground part 150. The isolation aid 130 uses a Noa Isolation Aid (NIA).
  • NIA Noa Isolation Aid
  • first antenna element 110, the second antenna element 120, and the isolation aid 130 are formed through a metal press, FPCB, pad printing, in molding and sputtering process, and the antenna frame ( 100) formed and fixed on the
  • the isolation aid 130 is disposed in parallel with the first antenna element 110 and the second antenna element 120. That is, the three fork-shaped strip lines are arranged in parallel with the antenna elements. As a result, the three strip lines may maintain a constant gap, and the outer strip lines may also maintain a constant gap with the first antenna element 110 and the second antenna element 120.
  • the isolation aid 130 reflects electromagnetic waves emitted from the first antenna element 110 and the second antenna element 120, thereby canceling the interference phenomenon.
  • the isolation aid 130 absorbs a current induced from the first antenna element 110 and the second antenna element 120 via the ground 200 through the ground unit 150, and thus, the antenna element. It serves to isolate currents mutually induced from each other.
  • the first and second antenna elements 110 and 120 and the isolation aid 130 are printed on the antenna frame 100 in the form of a single flexible printed circuit board (FPCB).
  • FPCB flexible printed circuit board
  • after printing in the form of FPCB may be attached to the antenna frame 100 and formed.
  • M built-in MIMO antenna
  • the first and second antenna elements 110 and 120 and the pattern M of the isolation aids 130 may be directly printed on the inner case C of the terminal.
  • the ground plane 150 of the first and second antenna elements 110 and 120 and the isolation aid 130 are interlocked with the C-clip or vogo-pin. To be connected to.
  • first and second antenna elements 110 and 120 and the isolation aid 130 may be made of sheet metal to be directly fused to the antenna frame 100.
  • a micro terminal such as a USB dongle type for a wireless LAN and a mobile communication terminal.
  • the ground 200 of the figure is connected to the ground parts 150 of the first and second antenna elements 110 and 120 and the isolation aid 130 to serve to ground the elements.
  • the ground 200 may be manufactured to a size of 35 ⁇ 60 ⁇ 1 mm 3 using a FR-4 substrate having a relative dielectric constant of 4.4.
  • first antenna element 110 and the second antenna element 120 has a variety of shapes, preferably made of a Planar Inverted F Antenna (PIFA) shape.
  • first antenna element 110 and the second antenna element 120 are formed to have a total length of ⁇ / 4 when the wavelength of the received signal wave and the wavelength of the output signal wave are ⁇ , respectively. .
  • the isolation aid 130 may be formed of an inductance component along three lengths of three fork-shaped strip lines, an interval between the three strip lines, and the first antenna element 110 and the second antenna element ( A parallel resonance shape is caused by a capacitance component according to a spaced distance between the 120 and the strip line at the outer side of the isolation aid 130.
  • the isolation aid 130 operates as a band stop filter, which is a filter that does not pass only a frequency of a specific band.
  • the resonance frequency f according to the inductance (L) component and the capacitance (C) component can be represented by a combination of a magnetic field and an electric field as shown in Equation 1 below.
  • the built-in MIMO antenna having the isolation aid according to an embodiment of the present invention when the first antenna element 110, the second antenna element 120 and the isolation aid 130 is designed as described above. Allows operation as a band stop filter.
  • the inductance components according to the lengths of the three strip lines of the fork-shaped isolation aid 130 are referred to as Lia1, Lia2, and Lia3, respectively, and the first antenna element 110 and the first antenna element are respectively.
  • the capacitance component according to the separation distance between the strip line is Cg1
  • the capacitance component according to the separation distance between the second antenna element 120 and the third strip line is Cg2
  • the separation between the first strip line and the second strip line When the capacitance component according to the distance is Ciag1 and the capacitance component according to the separation distance between the second strip line and the third strip line is Ciag2, the interference between the first antenna element 110 and the second antenna element 120.
  • the frequency of the band-blocking target to cancel is f BSP , it is designed to satisfy Equation 2 below to form each device.
  • the band blocking filter operation according to an embodiment of the present invention is not only used at a specific frequency, but also has an effect that can be used at frequencies of various other bands.
  • the isolation aid 130 may absorb a path of the current that affects the antenna elements, thereby effectively blocking the current induced by another antenna element.
  • the isolation aid 130 also serves as a reflector, so that the maximum directivity of the radiation pattern between the antenna elements is formed in opposite directions so that the ECC (Envelope Correlation Coefficient) can be greatly improved. Therefore, the built-in MIMO antenna having the isolation aid according to the present invention can form an independent antenna using an antenna element having other shapes such as a monopole antenna and an inverted F antenna (IFA) in addition to the PIFA.
  • the isolation aid 130 may also be formed in various shapes in addition to the fork shape.
  • 3 is a graph showing the return loss and isolation characteristics for the MIMO antenna without isolation aid.
  • the resonance frequency moves to the higher frequency due to the reduction of the length by the isolation aid, and exhibits very low isolation characteristics of -5.8 dB or less within the operating bandwidth. .
  • 4 and 5 are graphs showing return loss characteristics, isolation characteristics, and efficiency characteristics of a built-in MIMO antenna having an isolation aid according to an embodiment of the present invention.
  • the bandwidth of the internal MIMO antenna according to the present invention is based on a simulation result 2378 to 2485 based on a voltage standing wave ratio (hereinafter referred to as VSWR) VSWR> 3 representing an impedance matching degree. It can be seen that it has a bandwidth of MHz and excellent isolation characteristics of -20.6dB minimum and -29.1dB maximum within the operating bandwidth. In addition, it can be seen that the measurement result has a bandwidth of 2300 ⁇ 2380 MHz based on VSWR ⁇ 3, and shows excellent isolation characteristics of -18 dB minimum and -29 dB maximum within the operating bandwidth.
  • VSWR voltage standing wave ratio
  • the efficiency of the built-in MIMO antenna according to the present invention was measured in the radio-reflective room, it can be seen that the characteristics similar to the simulation results.
  • the simulation result is more than 36.2% efficient in the operating bandwidth, and the measurement result is more than 45.0% in the operating bandwidth. Therefore, even if it is implemented in a small size it is possible to ensure a relatively high efficiency characteristics, it can be driven stably during the operation of the antenna.
  • FIG. 6 is a diagram illustrating a distribution of currents flowing on a surface of a built-in MIMO antenna having an isolation aid according to an embodiment of the present invention.
  • the currents induced by the second antenna element are the isolation aid current. Is induced, and it can be seen that no current flows to the second antenna element. This characteristic change is because the path of the current is changed because the direction of the current induced by the second antenna element has a length slightly longer than ⁇ / 4.
  • FIG. 7 illustrates a 3D radiation pattern of a built-in MIMO antenna having an isolation aid according to an embodiment of the present invention.
  • FIG. 7A illustrates a radiation pattern when power is supplied to a first antenna element
  • FIG. 7B illustrates a radiation pattern when power is supplied to a second antenna element.
  • the power supply to each antenna element is reflected by the electromagnetic wave by the isolation aid has a maximum directivity in the opposite direction, it can be seen that the radiation to the other antenna is blocked.

Abstract

L'invention concerne une micro-antenne MIMO configurée dans un dispositif électronique et qui empêche les interférences entre les éléments d'antenne via un auxiliaire d'isolation noble (NIA). Selon l'invention, une antenne interne MIMO dotée d'un auxiliaire d'isolation comprenant : un premier élément d'antenne, un second élément d'antenne et un auxiliaire d'isolation en forme de fourche qui est disposé entre le premier élément d'antenne et le second élément d'antenne et mis à la terre sur une partie prédéterminée de sol.
PCT/KR2010/000652 2010-01-13 2010-02-03 Antenne interne mimo a auxiliaire d'isolation WO2011087177A1 (fr)

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KR1020100003179A KR100980774B1 (ko) 2010-01-13 2010-01-13 아이솔레이션 에이드를 구비한 내장형 ｍｉｍｏ 안테나
KR10-2010-0003179 2010-01-13

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2610964A1 (fr) * 2011-12-26 2013-07-03 Funai Electric Co., Ltd. Dispositif à antennes multiples et appareil de communication
DE102013100731A1 (de) * 2012-09-26 2014-04-17 Mediatek Singapore Pte. Ltd. Kommunikationsgerät und Antennen mit hohen Isolationseigenschaften
US9035830B2 (en) 2012-09-28 2015-05-19 Nokia Technologies Oy Antenna arrangement
GB2500209B (en) * 2012-03-13 2016-05-18 Microsoft Technology Licensing Llc Antenna isolation using a tuned ground plane notch
US9774079B2 (en) 2014-04-08 2017-09-26 Microsoft Technology Licensing, Llc Capacitively-coupled isolator assembly
US10361480B2 (en) 2012-03-13 2019-07-23 Microsoft Technology Licensing, Llc Antenna isolation using a tuned groundplane notch
WO2020101043A1 (fr) * 2018-11-12 2020-05-22 엘지전자 주식회사 Dispositif d'antenne et terminal mobile le comprenant

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KR101644908B1 (ko) * 2010-10-27 2016-08-03 삼성전자 주식회사 미모 안테나 장치
KR101139703B1 (ko) 2010-11-23 2012-04-26 주식회사 모비텍 복수개의 아이솔레이션 조절부를 구비한 ｍｉｍｏ 안테나
KR101195047B1 (ko) 2010-11-26 2012-10-29 주식회사 이엠따블유 Ｍｉｍｏ 안테나
KR101208011B1 (ko) 2011-05-04 2012-12-04 (주)하이케이텔레콤 동글 안테나
KR101622170B1 (ko) * 2015-08-20 2016-05-18 몰렉스 엘엘씨 차량용 외장 안테나
CN106785423B (zh) * 2017-01-09 2023-09-01 成都信息工程大学 5g通信高隔离全向阵列天线
CN109659686B (zh) * 2019-01-22 2023-10-20 惠州硕贝德无线科技股份有限公司 一种高隔离度mimo天线
KR102241220B1 (ko) * 2019-09-20 2021-04-19 (주)파트론 안테나 구조체
KR102501224B1 (ko) * 2021-06-30 2023-02-21 주식회사 에이스테크놀로지 전방향 mimo 안테나

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2610964A1 (fr) * 2011-12-26 2013-07-03 Funai Electric Co., Ltd. Dispositif à antennes multiples et appareil de communication
US9077081B2 (en) 2011-12-26 2015-07-07 Funai Electric Co., Ltd. Multi-antenna device and communication apparatus
GB2500209B (en) * 2012-03-13 2016-05-18 Microsoft Technology Licensing Llc Antenna isolation using a tuned ground plane notch
US10361480B2 (en) 2012-03-13 2019-07-23 Microsoft Technology Licensing, Llc Antenna isolation using a tuned groundplane notch
US10418700B2 (en) 2012-03-13 2019-09-17 Microsoft Technology Licensing, Llc Antenna isolation using a tuned ground plane notch
DE102013100731A1 (de) * 2012-09-26 2014-04-17 Mediatek Singapore Pte. Ltd. Kommunikationsgerät und Antennen mit hohen Isolationseigenschaften
US8922448B2 (en) 2012-09-26 2014-12-30 Mediatek Singapore Pte. Ltd. Communication device and antennas with high isolation characteristics
DE102013100731B4 (de) 2012-09-26 2018-10-11 Mediatek Singapore Pte. Ltd. Kommunikationsgerät und Antennen mit hohen Isolationseigenschaften
US9035830B2 (en) 2012-09-28 2015-05-19 Nokia Technologies Oy Antenna arrangement
US9306282B2 (en) 2012-09-28 2016-04-05 Nokia Technologies Oy Antenna arrangement
US9774079B2 (en) 2014-04-08 2017-09-26 Microsoft Technology Licensing, Llc Capacitively-coupled isolator assembly
WO2020101043A1 (fr) * 2018-11-12 2020-05-22 엘지전자 주식회사 Dispositif d'antenne et terminal mobile le comprenant

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