WO2020214015A1 - Radiateur d'antenne de station de base à double polarisation - Google Patents

Radiateur d'antenne de station de base à double polarisation Download PDF

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Publication number
WO2020214015A1
WO2020214015A1 PCT/KR2020/095071 KR2020095071W WO2020214015A1 WO 2020214015 A1 WO2020214015 A1 WO 2020214015A1 KR 2020095071 W KR2020095071 W KR 2020095071W WO 2020214015 A1 WO2020214015 A1 WO 2020214015A1
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WO
WIPO (PCT)
Prior art keywords
substrate
metal pattern
base station
station antenna
radiator
Prior art date
Application number
PCT/KR2020/095071
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English (en)
Korean (ko)
Inventor
김호용
태재훈
곽은혁
엥흐바야르바양뭉흐
Original Assignee
주식회사 에이스테크놀로지
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Publication of WO2020214015A1 publication Critical patent/WO2020214015A1/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
    • H01Q1/12—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
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H01Q1/46—Electric supply lines or communication lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna

Definitions

  • the present invention relates to a base station antenna radiator, and more particularly, to a base station antenna radiator having a double polarization structure.
  • the base station antenna is an antenna installed in the base station that transmits and receives signals to and from terminals within a preset radius.
  • Conventional base station antennas generally transmit and receive signals in a relatively low frequency band, and thus have a relatively large size.
  • Massive MIMO antenna is a technology that integrates active modules for each radiator and increases the capacity of the system through digital beamforming.
  • the active module is also integrated with radiators, calibration networks and filters.
  • a miniaturized size and low profile are required, and conventionally, a microstrip patch radiator using L-probe feed is used for this structure, but the L-probe feeding is a divider using a delay line having a phase difference of 180 degrees. There is a problem in that it does not have a stable polarization characteristic with respect to the frequency to use.
  • the present invention proposes a dual polarized base station antenna radiator that provides stable polarization characteristics with respect to frequency.
  • a power supply line is formed on the upper surface, and a'c' shape or a'C' shape first metal pattern and a second metal pattern are formed on the lower surface, A first substrate placed perpendicular to the reflector; A second substrate having a power supply line formed on the upper surface, a first metal pattern and a second metal pattern having a'c' shape or a'C' shape on the lower surface, and being perpendicular to the reflector and perpendicular to the first substrate ; And a third substrate coupled to the vertically placed first and second substrates and positioned parallel to the reflector and having a radiation patch formed on an upper surface thereof, wherein the first substrate and the second substrate The metal pattern is electrically connected to the radiation patch through the hole formed in the third substrate, the first metal pattern and the second metal pattern are disposed to be spaced apart while openings are formed in opposite directions, and the power supply line is A radiator of the base station antenna that provides a feed signal to the second metal pattern through
  • the first substrate and the second substrate include a first protrusion protruding upward, and a first extension part of the first metal pattern is formed on the first protrusion to be electrically connected to the radiation patch.
  • the first substrate and the second substrate include a second protrusion protruding downward, a second extension of the first metal pattern is formed on the second protrusion, and the second extension is electrically connected to a ground.
  • a +45 degree polarized signal is supplied to the power supply line of the first substrate, and a -45 degree polarized signal is supplied to the power supply line of the second substrate.
  • a third metal pattern having the same shape as the first metal pattern and a fourth metal pattern having the same shape as the second metal pattern are further formed on each of the first and second substrates, and the fourth metal pattern Is connected to the feed line through the via hole to receive a feed signal.
  • the third metal pattern and the fourth metal pattern are disposed to be spaced apart while openings are formed in opposite directions.
  • a feed line and a'c'-shaped or'C'-shaped second metal pattern are formed on the upper surface, and a'c'-shaped or'C'-shaped first metal pattern is formed on the lower surface.
  • a power supply line and a'c'-shaped or'C'-shaped second metal pattern is formed on the upper surface, and a'c'-shaped or'C'-shaped first metal pattern is formed on the lower surface, and is placed perpendicular to the reflector.
  • the metal pattern is electrically connected to the radiation patch through the hole formed in the third substrate, the first metal pattern and the second metal pattern have openings formed in opposite directions, and the power supply line is the second metal
  • a radiator of a base station antenna is provided that is coupled to the pattern to provide a feed signal.
  • the dual polarization base station antenna radiator of the present invention can provide stable polarization characteristics with respect to frequency.
  • FIG. 1 is a perspective view showing the structure of a base station antenna radiator according to an embodiment of the present invention.
  • FIG 2 is a perspective view of a state in which the upper third substrate is removed from the base station antenna radiator according to an embodiment of the present invention.
  • FIG 3 is a view showing a top surface structure of a first substrate according to a first embodiment of the present invention.
  • FIG 4 is a view showing the structure of the lower surface of the first substrate according to the first embodiment of the present invention.
  • FIG. 5 is a view showing a top surface structure of a first substrate according to a second embodiment of the present invention.
  • FIG. 6 is a view showing a structure of a lower surface of a first substrate according to a second embodiment of the present invention.
  • Fig. 7 is a diagram showing the top surface structure of a second substrate according to the first embodiment of the present invention.
  • FIG. 8 is a view showing a structure of a lower surface of a second substrate according to the first embodiment of the present invention.
  • FIG. 9 is a view showing the top surface structure of a second substrate according to a second embodiment of the present invention.
  • FIG. 10 is a view showing a structure of a lower surface of a second substrate according to a second embodiment of the present invention.
  • FIG. 11 is a perspective view showing the structure of a third substrate according to an embodiment of the present invention.
  • FIG. 12 is a diagram showing the structure of a base station antenna using a radiator of the base station antenna according to an embodiment of the present invention.
  • FIG. 1 is a perspective view showing the structure of a base station antenna radiator according to an embodiment of the present invention
  • FIG. 2 is a perspective view of a state in which an upper third substrate is removed from the base station antenna radiator according to an embodiment of the present invention.
  • a base station antenna includes a first substrate 100, a second substrate 110, and a third substrate 120.
  • the third substrate 120 functions as a radiator of a base station antenna according to an embodiment of the present invention, and a radiation patch 125 for radiating an RF signal is formed on the third substrate 120.
  • the radiation patch 125 is formed on the upper surface of the third substrate 120, and for example, a rectangular patch is formed.
  • the shape of the patch is not limited to a square, and may have various shapes based on a required radiation pattern and a resonance frequency.
  • a radiation patch 125 is formed on the third substrate 120, but a separate element is not formed on the lower surface of the third substrate 120. That is, the lower portion of the third substrate 120 is made of a dielectric material.
  • the first substrate 100 and the second substrate 110 function as elements that provide a feed signal to the radiation patch 125 and perform impedance matching.
  • the first substrate 100 and the second substrate 110 are vertically placed on a reflector (not shown) of the base station antenna, and a feed signal is provided to the first substrate 100 and the second substrate 110.
  • the first substrate 100 and the second substrate are vertically placed on a reflector (not shown) so as to cross each other to form a cross shape.
  • a groove for crossing the second substrate 110 in a cross shape may be formed in the first substrate 100.
  • the third substrate 120 is positioned parallel to the reflector (not shown) while being coupled to the first substrate 100 and the second substrate 110.
  • Metal patterns for supplying a +45 degree polarized signal to the radiation patch 125 and impedance matching are formed on the upper and lower surfaces of the first substrate 100. Further, metal patterns for supplying a -45 degree polarized signal to the radiation patch 125 and impedance matching are formed on the upper and lower surfaces of the second substrate 110.
  • the metal patterns formed on the first substrate 100 and the second substrate 110 preferably have the same structure, but may have different structures as necessary.
  • the radiation patch 125 formed on the third substrate 120 emits a +45 degree polarized signal and a -45 degree polarized signal provided through the first substrate 100 and the second substrate 110, respectively. Since a +45 degree polarized signal and a -45 degree polarized signal are radiated together through one radiation patch 125, there is a problem in that the base station antenna using the existing radiation patch does not sufficiently secure inter-polarization isolation. In addition, in a 5G system transmitting and receiving a broadband signal, the conventional base station antenna has a problem in that it does not provide a stable polarization characteristic for a broadband frequency.
  • the present invention proposes a power supply and impedance matching structure capable of providing stable polarization characteristics in order to solve such a problem, and the power supply and impedance matching structure includes the upper surfaces of the first substrate 100 and the second substrate 110. And formed on the lower surface.
  • the radiator of the base station antenna as shown in FIG. 1 has an arrangement structure in which a plurality of radiators are arranged on a reflector. At this time, signals of different phases are supplied to the radiators of each base station antenna, and a desired radiation pattern is formed through the phase adjustment.
  • a phase shifter may be used to adjust the phase of a signal fed to the radiator of each base station antenna.
  • FIG 3 is a diagram showing a top surface structure of a first substrate according to a first embodiment of the present invention.
  • a feed line 104 is formed on the upper surface of the first substrate 100.
  • the feed line 104 includes a feed point connection part 200, a branch part 210, a first feed line part 220 and a second feed line part 230.
  • the feed point connection part 200 is connected to an external cable or a metal pattern providing a feed signal.
  • the feed point connection unit 200 is connected to the inner core of the coaxial cable.
  • the feed line is divided into two parts, and as shown in FIG. 3, the first feed line part 220 and the second feed line part 230 are separated. From the separating part 210 to each of the first feed line part 220 and the second feed line part 230, it is preferable to configure a feed line so that the directions of currents are opposite to each other.
  • a first via hole 240 and a second via hole 250 are formed at each end of the first feed line part 220 and the second feed line part 230, and the feed signal of the feed line 104 is a first via hole. It is directly provided to the second metal pattern 302 and the fourth metal pattern 306 to be described later through the 240 and the second via hole 250.
  • a direct feeding structure is used for the second metal pattern 302, in order to maintain a stable polarization characteristic for a broadband.
  • the power supply line 104 formed on the first substrate 100 may be formed on the first substrate by various methods such as patterning, etching, and printing.
  • FIG. 4 is a diagram showing a structure of a lower surface of a first substrate according to a first embodiment of the present invention.
  • two metal patterns 300 and 302 spaced apart from each other are formed on the left side of the lower surface of the first substrate 100.
  • the number of metal patterns is not limited to two, and a metal pattern corresponding to a multiple of 2 may be formed on the lower surface of the first substrate 100.
  • the number of metal patterns spaced apart from each other may be 2, 4, or 6.
  • the metal pattern formed under the first substrate 100 has a'C' shape or a'C' shape, and the two metal patterns are disposed to face each other.
  • the first metal pattern 300 has a'C' shape with an opening formed on the left side
  • the second metal pattern 302 has a'C' shape with an opening formed on the right side.
  • the openings of the two metal patterns are formed in opposite directions.
  • the two metal patterns 300 and 302 may form a rectangle having a split structure.
  • the two metal patterns may form a circle having a split structure.
  • the second metal pattern 302 is directly connected to the feed line 104 through the first via hole 240 to receive a feed signal.
  • the first metal pattern 300 spaced apart from the second metal pattern 302 receives a power supply signal from the second metal pattern 302 through coupling.
  • the arrangement of the two metal patterns 300 and 302 so that the openings are in opposite directions is to allow the first metal pattern 300 and the second metal pattern 302 to form currents in the same direction.
  • a current is formed in the clockwise direction in the first metal pattern 300
  • a current is also formed in the clockwise direction in the second metal pattern 302.
  • the via hole 250 must be formed in an appropriate position.
  • a third metal pattern 304 and a fourth metal pattern 306, which are two spaced apart metal patterns, are also formed on the right side of the lower surface of the first substrate 100.
  • the third metal pattern 304 and the fourth metal pattern 306 have a symmetric structure with the first metal pattern 300 and the second metal pattern 302 on the left side.
  • the third metal pattern 304 has a symmetrical structure with the first metal pattern 300
  • the fourth metal pattern 306 has a symmetrical structure with the second metal pattern 302.
  • the metal pattern formed on the right side may also be formed in a multiple of 2 as the left side, and the openings are formed in opposite directions.
  • first metal pattern 300 and the third metal pattern 304 may be electrically connected.
  • the fourth metal pattern 306 receives a feed signal directly from the feed line 104 through the second via hole 250, and the third metal pattern 304 spaced apart from the fourth metal pattern 306 performs coupling.
  • the feed signal is provided through.
  • the magnetic field is strengthened.
  • the strengthened magnetic field strengthens the electric field of each polarization.
  • the improved cross-polarization ratio and inter-polarization isolation, respectively, can be well secured for each frequency and beam direction.
  • a plurality of first protrusions 105 are formed in an upward direction on the first substrate 100, and a plurality of first protrusions 105 extend upward from the first metal pattern 300 and the third metal pattern 304.
  • a plurality of first extensions 108 are formed. The first protrusion 105 and the first extension 108 penetrate through a hole formed in the third substrate, and the first extension 108 is electrically connected to the radiation patch 125 formed on the third substrate 120. Contact.
  • a plurality of second protrusions 106 are formed in a downward direction on the first substrate 100, and a first metal pattern 300 and a third metal pattern are formed on the plurality of second protrusions 106 in a downward direction.
  • a plurality of second extension portions 109 extending downward from 304 are formed.
  • the plurality of protrusions 105 pass through a reflector on which a radiator for a base station antenna according to the present invention is placed, and the second extension 109 is connected to a reflector or an element having the same ground potential as the reflector.
  • FIG. 5 is a diagram showing a top surface structure of a first substrate according to a second embodiment of the present invention.
  • a power supply line 104, a second metal pattern 302, and a fourth metal pattern 306 are formed on an upper surface of the first substrate 100.
  • the feed line 104 includes a feed point connection part 200, a branch part 210, a first feed line part 220 and a second feed line part 230.
  • the second embodiment is different from the first embodiment in that the second metal pattern 302 and the fourth metal pattern 306 are formed on the upper surface of the first substrate rather than the lower surface.
  • the end of the first feed line part 220 is directly connected to the second metal pattern 302, and the end of the second feed line part 230 is directly connected to the fourth metal pattern 306.
  • the shapes of the second metal pattern 302 and the fourth metal pattern 306 are the same as those of the first embodiment.
  • FIG. 6 is a diagram illustrating a structure of a lower surface of a first substrate according to a second embodiment of the present invention.
  • a first metal pattern 300 and a third metal pattern 304 are formed on the lower surface of the first substrate 100.
  • the first metal pattern 300 is formed on the left side of the lower surface of the first substrate 100
  • the third metal pattern 304 is formed on the right side of the lower surface of the first substrate 100.
  • the second metal pattern 302 and the fourth metal pattern 304 are not formed on the lower surface of the first substrate 100.
  • the first and second embodiments differ only in the positions of the second metal pattern 302 and the fourth metal pattern 304, but the operation principle is the same.
  • the first metal pattern 300 receives a feed signal from the second metal pattern 302 through coupling, and the third metal pattern 304 receives a feed signal from the fourth metal pattern 306.
  • FIG. 7 is a diagram showing a structure of an upper surface of a second substrate according to a first embodiment of the present invention
  • FIG. 8 is a view showing a structure of a lower surface of a second substrate according to the first embodiment of the present invention.
  • the lower surface structure of the second substrate according to the first embodiment is the same as the lower surface structure of the first substrate according to the first embodiment, and the first to fourth metal patterns are the same as the first substrate. It can be confirmed that it is formed.
  • the top surface structure of the second substrate according to the first embodiment is also the same as the top surface structure of the first substrate according to the first embodiment.
  • the first substrate and the second substrate have substantially the same structure, and the first substrate forms a good electric field of each polarized wave by strengthening the magnetic field for the +45 degree polarized signal, and then power supply and impedance matching are performed.
  • the substrate performs the supply and impedance matching for the -45 degree single plate signal.
  • the second substrate also includes a plurality of first protrusions 405 and second protrusions 406 protruding upward, and a plurality of first extensions 408 are formed on each of the plurality of first protrusions 405, Each of the second protrusions 406 is formed with a plurality of second extensions.
  • the first extension 408 is electrically connected to the radiation patch 125
  • the second extension 409 is electrically connected to a reflector or an element having the same ground potential as that of the reflector.
  • FIG. 9 is a view showing a structure of a top surface of a second substrate according to a second embodiment of the present invention
  • FIG. 10 is a view showing a structure of a lower surface of a second substrate according to a second embodiment of the present invention.
  • the structure of the upper and lower surfaces of the second substrate according to the second exemplary embodiment is also the same as the upper and lower surfaces of the first substrate according to the second exemplary embodiment.
  • FIG. 11 is a perspective view showing the structure of a third substrate according to an embodiment of the present invention.
  • a radiation patch 125 is formed on a third substrate 120, and a plurality of first protrusions 105 and a second substrate 110 of the first substrate 100 are formed on the third substrate and the radiation patch. ) A hole through which the plurality of first protrusions 405 can pass is formed.
  • a plurality of first protrusions 105 of the first substrate 100 are arranged in a direction of +45 degrees, and a plurality of first protrusions 405 of the second substrate 110 are arranged in a direction of -45 degrees, respectively. It provides a degree polarized signal and a -45 degree polarized signal.
  • the structure in which power is supplied directly to the second metal pattern and the fourth metal pattern, and the first metal pattern and the third metal pattern are fed by coupling can provide stable polarization characteristics for a broadband frequency. There is an advantage that can be effectively used in a 5G base station antenna that requires a low profile.
  • FIG. 12 is a diagram illustrating a structure of a base station antenna using a radiator of the base station antenna according to an embodiment of the present invention.
  • a plurality of radiators are arranged on a reflector 800 of a base station antenna.
  • a +45 degree polarized signal and a -45 degree polarized signal are supplied to each of the plurality of radiators forming the array, and a phase shifter may be used to adjust the phase of the signal supplied to each of the plurality of radiators.
  • each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)

Abstract

La présente invention concerne un radiateur d'antenne de station de base à double polarisation. Le radiateur d'antenne de station de base selon l'invention comprend : un premier substrat placé perpendiculairement à une plaque de réflecteur, une ligne d'alimentation étant formée sur la surface supérieure du premier substrat, et un premier motif métallique et un second motif métallique étant formés sur la surface inférieure de celui-ci dans des formes « ㄷ » ou des formes « C » ; un deuxième substrat placé perpendiculairement à la plaque réflectrice et perpendiculairement au premier substrat, une ligne d'alimentation étant formée sur la surface supérieure du deuxième substrat, et un premier motif métallique et un second motif métallique étant formés sur la surface inférieure de celui-ci dans des formes « ㄷ » ou des formes « C » ; et un troisième substrat couplé au premier substrat et au deuxième substrat placés perpendiculairement l'un par rapport à l'autre, le troisième substrat étant positionné parallèlement à la plaque de réflecteur, et un patch de rayonnement étant formé sur la surface supérieure du troisième substrat. Les premiers motifs métalliques du premier substrat et du deuxième substrat sont électriquement connectés au patch de rayonnement par l'intermédiaire de trous formés dans le troisième substrat. Les premiers motifs métalliques et les seconds motifs métalliques ont des ouvertures formées dans des directions opposées et agencées pour être espacées les unes des autres. La ligne d'alimentation fournit un signal d'alimentation aux seconds motifs métalliques par l'intermédiaire de trous d'interconnexion. Le radiateur d'antenne de station de base selon l'invention permet de fournir des caractéristiques de polarisation stables vis-à-vis des fréquences.
PCT/KR2020/095071 2019-04-19 2020-04-16 Radiateur d'antenne de station de base à double polarisation WO2020214015A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2019-0045847 2019-04-19
KR1020190045847A KR102125971B1 (ko) 2019-04-19 2019-04-19 이중 편파 기지국 안테나 방사체

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KR102414079B1 (ko) 2021-03-15 2022-06-29 주식회사 에이스테크놀로지 로우 프로파일 이중 편파 안테나

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011244244A (ja) * 2010-05-19 2011-12-01 Denki Kogyo Co Ltd 偏波ダイバーシチアンテナ
JP2013026707A (ja) * 2011-07-19 2013-02-04 Denki Kogyo Co Ltd 偏波ダイバーシチアレイアンテナ装置
JP2016119551A (ja) * 2014-12-19 2016-06-30 電気興業株式会社 偏波共用アンテナ装置
JP2016225956A (ja) * 2015-06-04 2016-12-28 日本電気株式会社 アンテナおよび無線通信機
CN106816697A (zh) * 2016-12-26 2017-06-09 上海交通大学 低剖面的uhf宽带圆极化手持终端天线

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011244244A (ja) * 2010-05-19 2011-12-01 Denki Kogyo Co Ltd 偏波ダイバーシチアンテナ
JP2013026707A (ja) * 2011-07-19 2013-02-04 Denki Kogyo Co Ltd 偏波ダイバーシチアレイアンテナ装置
JP2016119551A (ja) * 2014-12-19 2016-06-30 電気興業株式会社 偏波共用アンテナ装置
JP2016225956A (ja) * 2015-06-04 2016-12-28 日本電気株式会社 アンテナおよび無線通信機
CN106816697A (zh) * 2016-12-26 2017-06-09 上海交通大学 低剖面的uhf宽带圆极化手持终端天线

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