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WO2016064080A1 - Antenne multibande à deux ports - Google Patents

Antenne multibande à deux ports Download PDF

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Publication number
WO2016064080A1
WO2016064080A1 PCT/KR2015/008881 KR2015008881W WO2016064080A1 WO 2016064080 A1 WO2016064080 A1 WO 2016064080A1 KR 2015008881 W KR2015008881 W KR 2015008881W WO 2016064080 A1 WO2016064080 A1 WO 2016064080A1
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WO
WIPO (PCT)
Prior art keywords
radiating element
parasitic element
parasitic
radiating
ground plate
Prior art date
Application number
PCT/KR2015/008881
Other languages
English (en)
Korean (ko)
Inventor
오경섭
김영필
김상진
Original Assignee
주식회사 감마누
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
Publication date
Application filed by 주식회사 감마누 filed Critical 주식회사 감마누
Publication of WO2016064080A1 publication Critical patent/WO2016064080A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • 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

Definitions

  • the present invention relates to a multiband antenna, and more particularly, to a multiband two-port antenna having an excellent isolation securing effect.
  • MIMO Multi Input Multi Output
  • a MIMO antenna a plurality of antennas are essentially used to provide services of multiple frequency bands, and thus interference between antennas may occur.
  • the radiation pattern of the antennas may be distorted, or unintentional mutual coupling between the antennas may occur. Therefore, securing isolation between the antennas has emerged as an important problem.
  • antennas have been arranged in such a way that the distance between antennas is kept above a certain distance, but this method is no longer available due to the internal space problem of mobile communication devices. . Therefore, recently, a method of forming a wall by arranging a space between the antenna and the antenna to secure isolation is used, or by changing the ground structure to form a ground wall, such as the MIMO antenna used for 4G LTE.
  • a multi-band antenna two or more antennas must be disposed in a space smaller than half wavelength, so the space constraint is considerably larger than that of other antennas. Therefore, a multi-band antenna 100 having excellent isolation effect is required. do.
  • an object of the present invention is to provide a multiband antenna having an excellent isolation securing effect.
  • the multi-band antenna according to an embodiment of the present invention is a ground plate, the first radiating element of the Inverted-F type formed on the ground plate, formed to be spaced apart at a predetermined interval in a symmetrical form with the first radiating element
  • the device may further include a third parasitic element formed adjacent to the second parasitic element.
  • first radiating element and the second radiating element may include openings.
  • the first parasitic element may be formed in a loop type.
  • the second parasitic element may include a 2-1 parasitic element portion formed at a predetermined angle with the ground plate and a 2-2 parasitic element portion formed at one end of the 2-1 parasitic element.
  • the first parasitic element may include an opening and may be formed at a predetermined angle with the ground plate between the first radiating element and the second radiating element.
  • the first parasitic element may be formed in a slot type on the ground plate between the first radiating element and the second radiating element.
  • the third parasitic element may be formed on a rear surface of the second parasitic element and may be formed at a predetermined angle with the ground plate.
  • the first radiating element may further include a tuning element extending from one surface of the first radiating element.
  • the antenna size can be reduced.
  • FIG. 1 is a view showing a front view of a multi-band antenna according to an embodiment of the present invention.
  • FIG. 2 is a view showing a side view of a multi-band antenna according to an embodiment of the present invention.
  • 3 and 4 are diagrams illustrating a multi-band antenna according to another embodiment of the present invention.
  • 5 is a graph measuring the isolation of the multi-band antenna according to an embodiment of the present invention.
  • FIG. 6 is a graph of measuring a VSWR of a multi-band antenna according to an embodiment of the present invention at a first feeder.
  • FIG. 7 is a graph measuring the VSWR of a multi-band antenna according to an embodiment of the present invention at a second feeder.
  • FIG. 1 is a view showing a front view of the multi-band antenna 100 according to an embodiment of the present invention.
  • the multiband antenna 100 includes a ground plate 10, a first radiating element 20, a second radiating element 30, a first parasitic element 40, and a second parasitic element 50.
  • the ground plate 10 may use a general reflecting plate. Referring to FIG. 1, the ground plate 10 may be identified by the octagonal shape. However, the ground plate 10 may have various shapes depending on the shape and arrangement of the antenna elements formed on the ground plate 10. Can be implemented as: On the other hand, the ground plate 10 preferably minimizes the extra space between one end of the ground plate 10 and the antenna element formed near the one end in order to reduce the size of the entire antenna.
  • a first radiating element 20 is formed at a portion of the ground plate 10, and referring to FIG. 1, the first radiating element 20 of the inverted-F antenna (F) antenna type is the ground plate 10. It can be seen that formed near one side of the.
  • the first radiating element 20 may be formed of a conductive material, and may be formed in various lengths according to a frequency for transmitting and receiving. In addition, the first radiating element 20 may be formed of various types of antennas. When the first radiating element 20 is formed of a planar inverted F antenna type as shown in FIG. 1, the first radiating element 20 may be formed on the ground plate 10. An opening 21 on the radiating element for transmitting / receiving multiple frequency bands with a support such as a plastic rod for fixing and supporting may be formed. Here, the formation position, length, and area of the opening 21 may be adjusted to transmit and receive multiple frequency bands. In the present specification, the first radiating element 20 is used for 4G LTE through adjustment of the opening 21. A description will be made based on satisfying both the first frequency band (698 to 960 MHz) and the second frequency band (1.710 to 2.688 GHz).
  • the first radiating element 20 may further include a tuning element 22 capable of frequency matching.
  • a tuning element 22 capable of frequency matching.
  • a plurality of tuning elements 22 extending from one surface of the first radiating element 20 may be identified, and frequency matching may be performed by adjusting the formation position, number, and length of the tuning elements 22. .
  • the formation method, the formation position, the number and the length of the tuning element 22 can be variously adjusted as necessary.
  • the first radiating element 20 receives the feed signal through the first feed part 24.
  • the first feeder 24 may transmit a feed signal to the first radiating element 20 using a feed cable, and may use various kinds of feed means such as a coaxial cable.
  • a second radiating element 30 may be formed in one portion of the ground plate 10. Specifically, the second radiating element 30 may be formed at a symmetrical position to be spaced apart from each other in a symmetrical form with the first radiating element 20.
  • a second radiating element of the flat plate (patch) inverted-F antenna type having a shape symmetrical with the first radiating element 20 of the flat plate (patch) inverting-F antenna type including the opening 21. It can be seen that 30 is formed at a position symmetrical with the position where the first radiating element 20 is formed.
  • Other features such as openings, supports and tuning elements of the second radiating element 30 are the same as those of the first radiating element 30 described above.
  • the power supply signal is transmitted through the second power supply unit 34 separately from the first power supply unit 24.
  • the first radiating element 20 and the second radiating element 30 having symmetrical shapes are formed at positions symmetrical with each other on the ground plate 10, interference may occur between the two radiating elements. .
  • the radiation pattern of both radiation elements is distorted due to interference, or isolation is required to prevent unintentional mutual coupling.
  • the first parasitic element 40, the second parasitic element 50, and the third parasitic element 60 to ensure isolation are described.
  • FIG. 2 is a view showing a side view of the multi-band antenna 100 according to an embodiment of the present invention
  • Figures 3 and 4 shows a multi-band antenna 100 according to another embodiment of the present invention Drawing.
  • the first parasitic element 40 is formed on a part of the ground plate 10 to secure the isolation between the first radiating element 20 and the second radiating element 30.
  • the first parasitic element 40 may be formed as a wall type between the first radiating element 20 and the second radiating element 30 to secure isolation. It can also be formed by the method. Referring to FIG. 2, it can be seen that the first parasitic element 40 is formed to be spaced apart from one end of the first radiating element 20 by one end of the second radiating element 30.
  • the first parasitic element serves to secure isolation in the first frequency band (698 ⁇ 960 MHz) which is the low frequency band which is in charge of the first and second radiating elements (20, 30).
  • the first frequency band (698 ⁇ 960 MHz) is a low frequency band
  • the length of the antenna is inevitably lengthened, and the upper radiating element is removed based on the opening 21 of the first radiating element 20.
  • the 1-1 radiating element section 22 and the lower radiating element are referred to as the 1-2 radiating element section 23, the opening 21 to secure a sufficient antenna length value in the first frequency band (698 ⁇ 960 MHz).
  • Including the 1-1 radiating element portion 22 and the 1-2 radiating element portion 23 should be used. In this case, the total lengths of the 1-1 radiating element portion 22 and the 1-2 radiating element portion 23 are ⁇ / 4.
  • the first parasitic element 40 due to the H-field coupling, a strong current flows in the first-first radiating element part 22, and such current is prevented from flowing directly to the second radiating element 30 through the ground and affecting it.
  • the first parasitic element 40 In order to form the first parasitic element 40. That is, if a part of the current flowing through the ground flows into the first parasitic element 40, the part of the entire current flowing into the ground may be canceled, and as a result, the isolation may increase.
  • the first parasitic element 40 is formed as shown in FIG. 2, it is possible to efficiently arrange other antenna elements formed in the ground plate 10 by using less space than that formed in the wall type.
  • the first parasitic element 40 may be formed in a loop type.
  • a strong current flowing through the first-first radiating element part 22 of the first radiating element 2 by the H-field coupling described above is passed through the ground.
  • the first parasitic element 40 is required to be formed higher than the height of the first and second radiating elements 20 and 30 so as not to contact each other.
  • the first parasitic element when it is formed in a loop type, it may further include a support for fixing and supporting the ground plate 10.
  • the first parasitic element 40 when the first parasitic element 40 is formed as a wall type between the first radiating element 20 and the second radiating element 30, the first parasitic element 40 may be formed as a wall type including a loop. It may be formed to form a predetermined angle with the ground plate 10 by including an opening instead of a loop, as shown in Figure 4 without having a separate device slot the first parasitic element 40 in the ground plate 10 (Slot) type can also be formed.
  • the second parasitic element 50 is also formed in a part of the ground plate 10 to secure the isolation between the first radiating element 20 and the second radiating element 30.
  • the second parasitic element 50 may be formed to be spaced apart from the other end of the first radiating element 20 and the second radiating element 30 by a predetermined interval. That is, based on the ground plate 10, the second parasitic element 50 may be formed at a position opposite to the position where the first parasitic element 40 is formed.
  • the second parasitic element 50 is preferably formed at 6 o'clock, and the first parasitic element 40 Is formed at the 3 o'clock position of the ground plate 10, the second parasitic element 50 is preferably formed at the 9 o'clock position. The reason for this is described below in detail.
  • the first-first radiating element part 22 and the first-second radiating element part 23 including the opening 21 are secured to secure a sufficient antenna length value. It was discussed above that all should be used.
  • the 1-2 voltage radiating element portion 23 has a high voltage due to the E-field coupling.
  • the second parasitic element 50 is formed. That is, if a part of the voltage is transmitted to the second parasitic element 50 by the coupling effect, the part of the total voltage may be canceled, and as a result, the isolation may increase.
  • the second parasitic element 50 is formed in a bar type rather than a loop type unlike the first parasitic element 40, which is the first and second radiating elements 20 and 30. Is determined by the distance between them. That is, since the distance between one end of the first and second radiating elements 20 and 30 on which the first parasitic element is formed is closer than the distance between the other ends of the first and second radiating elements 20 and 30 on which the second parasitic element is formed.
  • the first parasitic element 40 is formed in a loop type
  • the second parasitic element 50 is formed in a bar type.
  • FIG. 2 is only one embodiment of the arrangement of the radiating elements, and in consideration of the distance between the radiating elements, the second parasitic element 50 may also be formed in a loop type.
  • the second parasitic element 50 has a second angle between the ground plate and the second parasitic element part 51.
  • the second parasitic element portion 52 formed at one end of the second parasitic element portion.
  • the 2-2 parasitic element unit 52 is formed at both ends of the 2-1 parasitic element unit 51.
  • the coupling effect may be better generated.
  • the second parasitic element 50 may be formed using only the second parasitic element portion 51 without forming the second parasitic element portion 52.
  • the first parasitic element 40 and the second parasitic element 50 are responsible for ensuring the isolation of the first frequency band (698 ⁇ 960 MHz) which is a low frequency band.
  • Figure 5 is a graph measuring the isolation of the multi-band antenna according to an embodiment of the present invention. Looking at the isolation measured in the first frequency band (698 ⁇ 960 MHz), it can be seen that -16.4dB at 695MHz, it is continuously increased to -28.3dB at 960MHz. Compared with the general multiband antenna 100 having an isolation of -9 to -10dB, it can be said that a relatively high isolation is ensured.
  • a third parasitic element 60 is formed in one portion of the ground plate 10 to secure isolation. Referring to FIG. 2, it can be seen that the third parasitic element 60 is formed adjacent to the second parasitic element 50.
  • the third parasitic element 60 secures isolation in the second frequency band (1.710 to 2.688 GHz), which is a high frequency band.
  • the second frequency band (1.710 ⁇ 2.688 GHz) uses only the first-first radiating element portion 22 of the first radiating element 20, in this case the length of the first-first radiating element portion 22 (When the tuning element is formed, including the length of the tuning element) is 3 ⁇ / 4. This is because almost all of the radiation is emitted before the current flows into the 1-2 radiating element section 23. Therefore, in the second frequency band (1.710 ⁇ 2.688 GHz), the first parasitic element does not play an important role in ensuring isolation.
  • the second parasitic element 50 secures isolation in some bands of the second frequency band (1.710 to 2.688 GHz) in addition to the first frequency band (698 to 960 MHz).
  • the third parasitic element 60 is formed adjacent to the second parasitic element 50 so that the corresponding frequency component is not transmitted from the first radiating element 20 to the second radiating element 30. Additional isolation is also possible in the frequency band (1.710–2.688 GHz).
  • the third parasitic element 60 is formed at a predetermined angle with the ground plate 10 on the rear surface of the second parasitic element 50, where the third parasitic element 60 is a monopole. It may be a parasitic element of an antenna type.
  • the second parasitic element 50 and the third parasitic element 60 are responsible for ensuring isolation of the second frequency band region (1.710 to 2.688 GHz) which is a high frequency band. Also, referring to FIG. 5, the effect can be confirmed.
  • the isolation rate measured in the second frequency band (1.710 to 2.688 GHz) is examined, it indicates -22.9 dB at 1.710 GHz, and then maintains the isolation at -20 dB or less after 2.688. At GHz, it can be seen that it is -25.4dB. This also can be said to ensure a significantly higher isolation than the isolation of the general multi-band antenna (100).
  • FIG. 6 and 7 are graphs of measuring a VSWR (Voltage Standing Wave Ratio) of the multi-band antenna 100 according to an embodiment of the present invention.
  • FIG. 6 is a diagram of the first feeder 20. 7 is the value measured by the 2nd power supply part 30.
  • the multi-band antenna 100 are spaced apart by a predetermined interval in a symmetrical form, and the first and second radiating elements 20 and 30 formed at symmetrical positions are appropriate based on this. Due to the first to third parasitic elements 40, 50, and 60 formed at the position, high isolation can be ensured. This makes it possible to reduce the overall size of the antenna. In addition, it can be applied to 4G LTE, and may be used as an in-building antenna installed inside a building.

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  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)

Abstract

La présente invention concerne une antenne multibande comprenant : une plaque de masse ; un premier élément rayonnant du type en F inversé formé sur la plaque de masse ; un second élément rayonnant du type en F inversé formé en étant espacé à intervalles prédéterminés dans une forme symétrique au premier élément rayonnant ; un premier élément parasite formé en étant espacé, à intervalles prédéterminés, d'une extrémité du premier élément rayonnant et du second élément rayonnant ; et un second élément parasite formé en étant espacé, à intervalles prédéterminés, de l'autre extrémité du premier élément rayonnant et du second élément rayonnant.
PCT/KR2015/008881 2014-10-23 2015-08-25 Antenne multibande à deux ports WO2016064080A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2014-0144144 2014-10-23
KR1020140144144A KR101632275B1 (ko) 2014-10-23 2014-10-23 다중대역 2포트 안테나

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WO2016064080A1 true WO2016064080A1 (fr) 2016-04-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113851829A (zh) * 2021-10-11 2021-12-28 广东中元创新科技有限公司 一种室内全向天线

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102097049B1 (ko) * 2019-05-17 2020-04-03 주식회사 이엠따블유 안테나 모듈 및 이를 포함하는 차량
KR102206670B1 (ko) * 2019-10-11 2021-01-22 (주)휴맥스 안테나 어셈블리 및 주파수 적응형 격리도 제공 방법
KR102104907B1 (ko) * 2020-01-28 2020-05-29 주식회사 알씨엔 8x8 일체형 다중 사용자 다중 입력 다중 출력 안테나

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KR20040004285A (ko) * 2003-12-13 2004-01-13 학교법인 한국정보통신학원 적층구조의 내장형 다중대역 안테나
KR20090093120A (ko) * 2008-02-28 2009-09-02 한양대학교 산학협력단 적응적 아이솔레이션을 위한 미모 어레이 안테나
KR20130025571A (ko) * 2011-09-02 2013-03-12 주식회사 이엠따블유 다중 안테나
KR20130102170A (ko) * 2012-03-07 2013-09-17 주식회사 팬택 아이솔레이션이 개선된 복수 안테나 내장형 단말기
KR20140034932A (ko) * 2011-07-13 2014-03-20 퀄컴 인코포레이티드 다중의 안테나들 및 적어도 하나의 기생 엘리먼트를 갖는 광대역 안테나 시스템

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KR101372704B1 (ko) 2012-01-31 2014-03-13 공기현 안테나 격리도 향상을 위한 안테나 어셈블리

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040004285A (ko) * 2003-12-13 2004-01-13 학교법인 한국정보통신학원 적층구조의 내장형 다중대역 안테나
KR20090093120A (ko) * 2008-02-28 2009-09-02 한양대학교 산학협력단 적응적 아이솔레이션을 위한 미모 어레이 안테나
KR20140034932A (ko) * 2011-07-13 2014-03-20 퀄컴 인코포레이티드 다중의 안테나들 및 적어도 하나의 기생 엘리먼트를 갖는 광대역 안테나 시스템
KR20130025571A (ko) * 2011-09-02 2013-03-12 주식회사 이엠따블유 다중 안테나
KR20130102170A (ko) * 2012-03-07 2013-09-17 주식회사 팬택 아이솔레이션이 개선된 복수 안테나 내장형 단말기

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113851829A (zh) * 2021-10-11 2021-12-28 广东中元创新科技有限公司 一种室内全向天线

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KR101632275B1 (ko) 2016-06-21
KR20160047783A (ko) 2016-05-03

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