WO2015029946A1 - Antenne et antenne à secteurs - Google Patents

Antenne et antenne à secteurs Download PDF

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Publication number
WO2015029946A1
WO2015029946A1 PCT/JP2014/072158 JP2014072158W WO2015029946A1 WO 2015029946 A1 WO2015029946 A1 WO 2015029946A1 JP 2014072158 W JP2014072158 W JP 2014072158W WO 2015029946 A1 WO2015029946 A1 WO 2015029946A1
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WIPO (PCT)
Prior art keywords
antenna
high frequency
frequency
low frequency
vertical polarization
Prior art date
Application number
PCT/JP2014/072158
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English (en)
Japanese (ja)
Inventor
拓人 中村
泰介 井原
裕之 川合
龍彦 吉原
Original Assignee
日本電業工作株式会社
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 日本電業工作株式会社 filed Critical 日本電業工作株式会社
Priority to CN201490000939.1U priority Critical patent/CN205646175U/zh
Publication of WO2015029946A1 publication Critical patent/WO2015029946A1/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
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/42—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more imbricated arrays
    • 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
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/062—Two dimensional planar arrays using dipole aerials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
    • H01Q21/205—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path providing an omnidirectional coverage
    • 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
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre

Definitions

  • the present invention relates to an antenna and a sector antenna.
  • an antenna (base station antenna) for a base station of mobile communication a plurality of sector antennas for transmitting and receiving radio waves are used in combination for each sector set corresponding to the direction of transmitting and receiving radio waves.
  • a sector antenna an array antenna in which antenna elements such as a dipole antenna are arranged in an array is used.
  • Patent Document 1 discloses a multi-frequency shared antenna provided with a reflector and a logarithmic periodic dipole antenna disposed at a distance from the reflector and having a plurality of dipole elements that emit radio waves of different frequencies.
  • the logarithmic periodic dipole antenna has the smallest distance between the dipole element emitting the highest frequency radio wave and the reflection plate, and the largest distance between the dipole element emitting the lowest frequency radio wave and the reflection plate.
  • Patent Document 2 shows a frequency sharing polarization sharing antenna apparatus in which individual antenna units applied to two different polarizations are provided for each of a plurality of frequency bands, and a folded dipole antenna is used as an antenna element of each antenna unit.
  • a frequency shared polarization shared antenna apparatus using elements has been described.
  • an antenna may be required to be able to transmit and receive radio waves of different frequency bands. At that time, it is required that the directivity in transmission and reception of radio waves in a certain frequency band is less affected by the antenna element in the frequency band higher than the frequency.
  • An object of the present invention is to transmit and receive radio waves in a plurality of frequency bands, and to make the antenna compact while suppressing the influence of antenna elements in frequency bands higher than the frequency in transmitting and receiving radio waves in a certain frequency band. It is to provide etc.
  • an antenna to which the present invention is applied is a reflector, and a first dipole antenna provided at a first predetermined distance from the reflector and transmitting and receiving radio waves in a first frequency band.
  • the near side has a wider conductor than the far side.
  • a third antenna is provided at a predetermined third distance from the reflector and transmits / receives radio waves of polarized waves intersecting the first dipole antenna.
  • a dipole antenna and a side of the reflector on which the first dipole antenna is provided, provided at a predetermined fourth distance from the reflector and transmitting / receiving radio waves of polarized waves intersecting the second dipole antenna It may be characterized by further comprising at least one of the four dipole antennas. According to this configuration, polarization can be shared as compared with the case without this configuration.
  • control of the beam width, the return loss amount, and the like can be made easier as compared with the case where the antenna is not provided with a parasitic element.
  • the sector antenna to which the present invention is applied is a reflector and a first dipole provided at a first predetermined distance from the reflector and transmitting and receiving radio waves in a first frequency band.
  • the antenna and the side of the reflector on which the first dipole antenna is provided are provided at a predetermined second distance from the reflector and transmit / receive radio waves in a second frequency band higher than the first frequency band
  • a second dipole antenna and two element units that constitute the second dipole antenna and transmit and receive radio waves in the second frequency band are provided toward the reflector from each of the two element portions, and the distance in the direction parallel to the reflector is
  • An array antenna in which a plurality of antennas each including a wider conductor than a side closer to the reflector is arranged is provided, and a radome housing the array antenna. According to this configuration, the sector antenna can be made smaller than in the case where this configuration is not provided.
  • the present invention it is possible to miniaturize the directivity of transmitting / receiving radio waves of a certain frequency band while transmitting / receiving radio waves of a plurality of frequency bands while suppressing the influence of the antenna element of the frequency band higher than the frequency. Etc. can be provided.
  • FIG. 1 is a view showing an example of the entire configuration of a mobile communication base station antenna 1 to which the first embodiment is applied.
  • FIG. 1A is a perspective view of the base station antenna 1
  • FIG. 1B is a view for explaining an installation example of the base station antenna 1.
  • the base station antenna 1 includes, for example, three sector antennas 10-1 to 10-3 held by a steel tower 20. Then, as shown in FIG. 1 (b), the base station antenna 1 transmits and receives radio waves (beams) in the cell 2.
  • the cell 2 is a range in which radio waves transmitted by the base station antenna 1 reach, and is a range in which the base station antenna 1 receives radio waves.
  • the sector antennas 10-1 to 10-3 each have, for example, a cylindrical outer shape (the radome 500 in FIG. 2 described later), and the center axis of the cylinder is provided vertically (vertically) with respect to the ground .
  • the cell 2 is provided with a plurality of sectors 3-1 to 3-3 divided at an angle in the horizontal plane.
  • the sectors 3-1 to 3-3 are provided corresponding to the three sector antennas 10-1 to 10-3 of the base station antenna 1, respectively. That is, when the sector antennas 10-1 to 10-3 output radio waves, the direction of the main lobe 11 in which the electric field of the radio waves output from each of the sector antennas 10-1 to 10-3 is larger corresponds to the sector 3-1. It is supposed to turn to ⁇ 3-3.
  • the sector antennas 10-1 to 10-3 are not distinguished from one another, they are referred to as a sector antenna 10.
  • the sectors 3-1 to 3-3 are not distinguished from one another, they are referred to as sector 3.
  • the base station antenna 1 shown as an example in FIG. 1 includes three sector antennas 10-1 to 10-3 and sectors 3-1 to 3-3 corresponding thereto.
  • sector antennas 10 and sectors 3 may have a predetermined number less than or greater than three.
  • sector 3 is configured by dividing cell 2 into three equal parts (central angle 120 °), but it does not have to be equal and any one sector 3 is the other. It may be configured wider or narrower than the sector 3 of FIG.
  • each sector antenna 10 is a transmission signal in the antenna unit (refer to antenna units 110-1 to 110-3 in FIG. 2 mentioned later. When each is not distinguished, it describes with the antenna unit 110.) the sector antenna 10 is provided. And transmission and reception cables 31 and 32 for transmitting and receiving reception signals.
  • the sector antenna 10 is frequency sharing that can transmit and receive different signals of two frequency bands
  • the transmission and reception cable 31 is a signal of a lower frequency band (a low frequency band as an example of a first frequency band).
  • the transmission / reception cable 32 corresponds to the signal of the higher frequency band (high frequency band as an example of the second frequency band).
  • the transmission and reception cables 31 and 32 are connected to a transmission and reception unit (not shown) that transmits and receives a transmission signal and a reception signal provided in a base station (not shown).
  • the transmission and reception cables 31 and 32 are, for example, coaxial cables.
  • the reversibility of the antenna enables the base station antenna 1 to receive radio waves.
  • a transmission signal may be used as a reception signal and the flow of the signal may be reversed.
  • the sector antenna 10 may be provided with a phase shifter for making the phases of transmission signals to be transmitted to each of the plurality of antenna units 110 provided in the sector antenna 10 different from each other.
  • a phase shifter for making the phases of transmission signals supplied to the plurality of antenna units 110 different, the radiation angle of the radio wave is inclined (beam-tilted) from the horizontal plane to the ground direction so that the radio wave does not reach the outside of the cell 2 it can.
  • two phase shifters may be provided corresponding to each of the two frequency signals.
  • FIG. 2 is a diagram showing an example of the configuration of the sector antenna 10 to which the first embodiment is applied.
  • the sector antenna 10 is placed sideways and is shown in a perspective view as viewed from an oblique direction.
  • the sector antenna 10 includes an array antenna 100 including antenna units 110-1, 110-2, and 110-3 arranged in the vertical direction, and a radome 500 that houses the array antenna 100 so as to wrap it.
  • the radome 500 is shown by a broken line so that the array antenna 100 provided inside the radome 500 can be seen.
  • Antenna unit 110-1, 110-2, 110-3 are arranged at intervals P L which is predetermined in the vertical direction.
  • the radome 500 has, for example, a cylindrical shape, and includes a wall 501, a lid 502, and a bottom 503.
  • the array antenna 100 is housed inside the wall 501, the lid 502, and the bottom 503.
  • the antenna unit 110 includes two low frequency vertical polarization antennas 120a and 120b transmitting and receiving vertical polarization in a low frequency band, and two high frequency vertical polarization antennas 130a and 130b transmitting and receiving a vertical polarization in high frequency band. And have.
  • the terms "low frequency” and "high frequency” are used to distinguish two types of antennas.
  • the low frequency vertical polarization antennas 120a and 120b are provided on the surface side of the low frequency reflection plate 150 which is a reflection plate set for transmission and reception of vertical polarization in a low frequency band.
  • the low frequency reflector 150 is an example of a reflector.
  • the low frequency reflection plate 150 is continuous in the plurality of antenna units 110 (the antenna units 110-1, 110-2, and 110-3 in FIG. 2) in FIG. Here, as shown in FIG. 2, even if the low frequency reflection plate 150 is continuous between the plurality of antenna units 110, it is assumed that each of the antenna units 110 is provided.
  • the low frequency reflection plate 150 is a rectangular plate-like member having a vertical direction longer than that in the horizontal direction in a state of being continuous between the antenna units 110, and is made of, for example, a conductive material such as aluminum, aluminum alloy or copper. It is made of a material.
  • the high frequency vertical polarization antennas 130 a and 130 b are surfaces of the high frequency reflection plate 160 which is a reflection plate set for transmission and reception of vertical polarization of high frequency band provided on the surface side of the low frequency reflection plate 150 (low frequency reflection plate It is provided on the side far from 150).
  • Vertical polarization is polarization in which the vibration direction of the electric field is perpendicular to the ground
  • horizontal polarization is polarization in which the vibration direction of the electric field is horizontal to the ground.
  • the high frequency reflection plate 160 is provided for each of the antenna units 110 at the central portion in the horizontal direction (width direction) of the low frequency reflection plate 150 in FIG.
  • the high frequency reflection plate 160 is also a plate-like member, and is made of, for example, a conductive material such as aluminum, an aluminum alloy, or copper.
  • the low frequency reflection plate 150 may double as the high frequency reflection plate 160. That is, the high frequency reflection plate 160 may not be provided.
  • the low frequency vertical polarization antennas 120 a and 120 b are provided at both ends in the width direction (horizontal direction) of the high frequency reflecting plate 160 so as to sandwich the high frequency reflecting plate 160.
  • the high frequency vertically polarized antennas 130a and 130b are arranged in the vertical direction on the surface of the high frequency reflector 160 (the surface on the side far from the low frequency reflector 150).
  • the low frequency vertical polarization antennas 120a and 120b have the same configuration, and therefore, when the low frequency vertical polarization antennas 120a and 120b are not distinguished from one another, they are marked as the low frequency vertical polarization antenna 120.
  • the antenna unit 110 including the low frequency vertical polarization antenna 120, the high frequency vertical polarization antenna 130, and the low frequency reflector 150 may be referred to as an antenna.
  • the low frequency vertical polarization antenna 120 and the high frequency vertical polarization antenna 130 may be referred to as antenna elements.
  • the low frequency vertically polarized antenna 120 are arranged at intervals P L of the antenna unit 110 is arranged.
  • the interval P L is set in properties required for the sector antenna 10 in transmitting and receiving radio waves of a low frequency band.
  • radio-frequency vertically polarized antenna 130 are arranged at intervals P H.
  • the interval P H is set with properties required for the sector antenna 10 in transmitting and receiving radio waves of high frequency bands.
  • the interval P L is described as being twice the spacing P H. Incidentally, may be less than two times the distance P L interval P H, it may be two fold.
  • the low-frequency vertical polarization antenna 120 and the high-frequency vertical polarization antenna 130 are arranged in the vertical direction, and the low-frequency vertical polarization antenna 120 and the high-frequency vertical polarization antenna 130 intersect in the vertical direction (oblique direction) By arranging in this way, the antenna unit 110 for frequency sharing, the array antenna 100, and the sector antenna 10 can be miniaturized.
  • the low frequency reflection plate 150 is a flat plate in FIG. 2, but both end portions in the horizontal direction may be bent to the front side or the back side. Further, although the high frequency reflection plate 160 is provided for each antenna unit 110 in FIG. 2, the high frequency reflection plate 160 may be continuous between the plurality of antenna units 110 similarly to the low frequency reflection plate 150. Moreover, although the high frequency reflecting plate 160 is a flat plate like the low frequency reflecting plate 150, both ends in the horizontal direction may be bent to the front side or the back side. Furthermore, plate-like members made of another conductive material may be installed along the vertical direction at both ends in the horizontal direction.
  • the low-frequency vertically polarized antenna 120 is disposed so that two element units 121 and 122 (see FIG. 3 described later) constituting a dipole antenna are linearly aligned in the vertical direction.
  • the conductors 123 and 124 (see FIG. 3 described later) provided from each of the element units 121 and 122 toward the reflection plate are vertically provided toward the low frequency reflection plate 150.
  • two element units 131 and 132 (see FIG. 3 described later) constituting a dipole antenna are linearly aligned in the vertical direction, similarly to the low frequency vertically polarized antenna 120. It is arranged.
  • the conductors 133 and 134 provided from the element portions 131 and 132 toward the reflection plate are separated from each other as they approach the high frequency reflection plate 160. It is provided toward the high frequency reflection plate 160 so as to increase.
  • the conductors 123 and 124 may be connected to the low frequency reflector 150 or the high frequency reflector 160.
  • the conductors 133 and 134 may be connected to the high frequency reflection plate 160.
  • the high frequency reflection plate 160 may be connected (fixed) to the low frequency reflection plate 150.
  • FIG. 3 is a view for explaining an example of the low frequency vertical polarization antenna 120 and the high frequency vertical polarization antenna 130 to which the first embodiment is applied.
  • 3 (a) is a view of the low frequency vertically polarized antenna 120 in FIG. 2 as viewed from the right in the horizontal direction
  • FIG. 3 (b) is a view of the high frequency vertically polarized antenna 130 in FIG. It is.
  • the low frequency vertical polarization antenna 120 of FIG. 3A may be any of the low frequency vertical polarization antennas 120a and 120b. As mentioned above, they are isomorphic.
  • the high frequency vertical polarization antenna 130 of FIG. 3B may be any of the high frequency vertical polarization antennas 130a and 130b. As mentioned above, they are isomorphic.
  • the portions other than the low frequency reflector 150 and the high frequency reflector 160 are, for example, conductive provided on the front and back of a dielectric substrate made of a dielectric material. It is assumed that it is composed of a conductive pattern made of For example, it is assumed that a conductor pattern is formed of a conductive material such as copper, which is a conductive material, on a dielectric substrate, such as glass epoxy, which is a dielectric material.
  • FIGS. 3A and 3B portions shown by halftone dots are conductor patterns made of a conductive material. In FIG. 2 (FIGS. 4 to 6, 7 (a) and 8 (a) described later), only the conductor pattern is shown.
  • the low frequency vertical polarization antenna 120 will be described with reference to FIG.
  • the low frequency vertical polarization antenna 120 is formed of a rectangular conductor pattern formed on the surface of the dielectric substrate 141, and is an example of a first dipole antenna provided so that its longitudinal direction is aligned on a straight line.
  • the element units 121 and 122 are provided.
  • the element units 121 and 122 constitute a dipole antenna.
  • the low frequency vertical polarization antenna 120 is formed of a conductor pattern provided on the surface of the dielectric substrate 141, and one end of each of the conductors is connected to the opposing portion of the element portions 121 and 122. , 124 are provided.
  • each of the conductors 123 and 124 extends vertically toward the low frequency reflector 150 and penetrates the low frequency reflector 150 together with the dielectric substrate 141 and protrudes from the back surface of the low frequency reflector 150. ing. That is, the element portion 121 and the conductor 123 are formed by a continuous conductor pattern, and the element portion 122 and the conductor 124 are formed by a continuous conductor pattern. The conductors 123 and 124 and the dielectric substrate 141 may not penetrate through the low frequency reflection plate 150.
  • the other ends of the conductors 123 and 124 are connected to a feeder (not shown) on the back surface side of the low frequency reflection plate 150.
  • the other ends of the conductors 123 and 124 may be connected to each other in the vicinity of the low frequency reflection plate 150.
  • the dielectric substrate 141 and the conductors 123 and 124 are fixed by a dielectric (electrical insulator) embedded in an opening provided in the low frequency reflector 150, and the conductors 123 and 124 and the low frequency reflector There is no contact with 150.
  • the dielectric substrate 141 and the conductors 123 and 124 may be in contact with the low frequency reflection plate 150.
  • a conductor pattern for supplying a low frequency band signal to the low frequency vertically polarized antenna 120 is provided on the back surface of the dielectric substrate 141.
  • This conductor pattern, together with the conductors 123 and 124, not only constitutes a microstrip line, but also constitutes a balance-unbalance converter.
  • a length W L is set between both outer ends in the longitudinal direction of the element portions 121 and 122.
  • the height HL as an example of the first distance is set from the surface of the low frequency reflection plate 150 to the center in the short side direction of the element units 121 and 122.
  • the high frequency vertically polarized antenna 130 is formed of a rectangular conductor pattern formed on the surface of the dielectric substrate 142, and is an element as an example of a second dipole antenna provided so that its longitudinal direction is aligned on a straight line.
  • the units 131 and 132 are provided.
  • the element units 131 and 132 constitute a dipole antenna.
  • the high frequency vertical polarization antenna 130 is formed of a conductor pattern provided on the surface of the dielectric substrate 142, and one end of each of the conductors 133 is connected to the opposing portion of the element portions 131 and 132, It has 134.
  • each of the conductors 133 and 134 extends toward the high frequency reflector 160 so as to be separated from each other as the high frequency reflector 160 is approached.
  • the other end of each of the conductors 133 and 134 penetrates the high frequency reflection plate 160 together with the dielectric substrate 142 and protrudes from the back surface of the high frequency reflection plate 160. That is, the element portion 131 and the conductor 133 are formed by a continuous conductor pattern, and the element portion 132 and the conductor 134 are formed by a continuous conductor pattern.
  • the other ends of the conductors 133 and 134 are connected to a feeder (not shown) on the back surface side of the high frequency reflection plate 160.
  • the dielectric substrate 142 and the conductors 133 and 134 are fixed by a dielectric (electrical insulator) embedded in an opening provided in the high frequency reflection plate 160, and the conductors 133 and 134 and the high frequency reflection plate 160 Will not touch.
  • the dielectric substrate 142 and the conductors 133 and 134 may be in contact with the high frequency reflection plate 160.
  • the other end of each of the conductors 133 and 134 and the dielectric substrate 142 may not penetrate through the high frequency reflection plate 160. In that case, on the surface side of the high frequency reflection plate 160, it is connected to a feeder (not shown).
  • a conductor pattern for supplying a high frequency band signal to the high frequency vertically polarized antenna 130 is provided on the back surface of the dielectric substrate 142.
  • This conductor pattern, together with the conductors 133 and 134, not only constitutes a microstrip line, but also constitutes a balance-unbalance converter.
  • the distance between both outer ends in the longitudinal direction of the element portions 131 and 132 is set to a length W H.
  • the height H H is set from the surface of the high frequency reflection plate 160 to the center in the short side direction of the element units 131 and 132.
  • the gap (gap) in the direction parallel to the surface of the high frequency reflecting plate 160 of the opposing portion of each of the conductor patterns of the conductors 133 and 134 is the distance D T on the side connected to the element portions 131 and 132, the high frequency reflecting plate
  • the distance D B is set on the side closer to 160.
  • the distance D B closer to the high-frequency reflection plate 160 is larger configuration than the distance D T of side connected to the element portion 131 and 132 (the side far from the high-frequency reflection plate 160) (D B> D T ).
  • the height from the surface of the low frequency reflection plate 150 to the center in the short side direction of the element units 131 and 132 is an example of a second distance.
  • the conductor portions (the conductors 123 and 124 in FIG. 3A and the portions corresponding to the conductors 133 and 134 in FIG. 3B) that pass when feeding are perpendicular to the reflector.
  • the conductors 123 and 124 passing when feeding the low frequency vertical polarization antenna 120 are provided perpendicularly to the low frequency reflector 150.
  • the distance between the conductor 123 and the conductor 124 in the direction parallel to the surface of the low frequency reflection plate 150 is the side connected to the element portions 121 and 122 (the side far from the low frequency reflection plate 150) and the low frequency reflection plate 150 There is no difference between the near side and the near side.
  • the conductors 133 and 134 that pass when the high frequency vertically polarized antenna 130 feeds power are provided obliquely with respect to the high frequency reflecting plate 160.
  • the distance between the conductor 133 and the conductor 134 in the direction parallel to the surface of the high frequency reflection plate 160 is the distance D T of the side connected to the element portions 131 and 132 (the side far from the high frequency reflection plate 160) and the high frequency reflection plate 160
  • a difference is provided between the distance D B and the distance D B closer to the distance D T , and the distance D B is set to be larger than the distance D T.
  • the conductors 133 and 134 are formed in an inverted V shape so as to be separated from each other as they are closer to the high frequency reflection plate 160 from the side connected to the element portions 131 and 132 (the side far from the high frequency reflection plate 160). ing.
  • the conductors 123 and 124 of the low frequency vertically polarized antenna 120 are provided vertically to the low frequency reflector 150, they may be provided obliquely.
  • FIG. 4 is a view for explaining a modification of the sector antenna 10 to which the first embodiment is applied.
  • the sector antenna 10 is configured by adding a parasitic element.
  • the parasitic elements are provided to match impedance in a wide frequency band and to adjust the directivity and voltage standing wave ratio (VSWR) of the antenna unit 110, the array antenna 100, and the sector antenna 10.
  • VSWR is a numerical value indicating the degree of matching between the feed line and the antenna that is the load, and the closer to 1 the better.
  • the array antenna 100 includes three antenna units 110.
  • Each antenna unit 110 has a predetermined distance in a direction away from low frequency reflection plate 150 from low frequency vertical polarization antenna 120 a on the surface side of low frequency reflection plate 150 provided with low frequency vertical polarization antenna 120 a.
  • the parasitic element 171a is provided at the position of the element along the element portions 121 and 122 (see FIG. 3A). Further, the parasitic element 171b is provided for the low frequency vertical polarization antenna 120b as well as the low frequency vertical polarization antenna 120a.
  • each antenna unit 110 has a parasitic element 172a provided on the surface side of the low frequency reflection plate 150 so as to rise from the low frequency reflection plate 150 outside the low frequency vertical polarization antenna 120a in the horizontal direction.
  • a passive element 172 b provided so as to rise from the low frequency reflector 150 is provided outside the low frequency vertical polarization antenna 120 b in the horizontal direction.
  • each antenna unit 110 is located at a predetermined distance in a direction away from the high frequency reflection plate 160 from the high frequency vertical polarization antenna 130 a on the surface side of the high frequency reflection plate 160 provided with the high frequency vertical polarization antenna 130 a.
  • the passive element 173a is provided along the element portions 131 and 132 (see FIG. 3B).
  • the parasitic element 173b is also provided for the high frequency vertically polarized antenna 130b as in the high frequency vertically polarized antenna 130a.
  • parasitic elements 171a, 171b, 172a, 172b, 173a and 173b are provided to adjust the directivity and VSWR of the antenna unit 110, the array antenna 100 and the sector antenna 10. Therefore, the parasitic elements may be set so as to obtain predetermined directivity and predetermined VSWR ratio without being limited to the above-described shape, positions and number of the elements provided. In addition, if a predetermined directivity and VSWR can be obtained, the parasitic element may not be provided.
  • the antenna unit 110 shown in FIG. 2 combines two low frequency vertical polarization antennas 120a and 120b and two high frequency vertical polarization antennas 130a and 130b.
  • one low frequency vertical polarization antenna 120 and two high frequency vertical polarization antennas 130a and 130b may be combined, and two low frequency vertical polarization antennas 120a and 120b and one high frequency vertical polarization may be used.
  • the wave antenna 130 may be combined.
  • one low frequency vertical polarization antenna 120 and one high frequency vertical polarization antenna 130 may be combined.
  • a plurality of antenna units 110 may be combined to provide more than two low frequency vertically polarized antennas 120 or more than two high frequency vertically polarized antennas 130 as the antenna unit 110.
  • the low frequency vertical polarization antenna 120 is rotated by 45 ° on the low frequency reflector 150 and the high frequency vertical polarization antenna 130 is rotated by 45 ° on the high frequency reflector 160. Can transmit and receive 45 ° polarization.
  • the low frequency vertical polarization antenna 120 and the high frequency vertical polarization antenna 130 are rotated by 45 °, not the vertical polarization but 45 ° polarization is transmitted / received. Therefore, “vertical” may be read as “45 °”. The same is true for polarizations of other angles.
  • the sector antenna 10 to which the first embodiment is applied is frequency sharing capable of transmitting and receiving vertical polarization.
  • the sector antenna 10 to which the second embodiment is applied is frequency sharing and polarization sharing capable of sharing vertical polarization and horizontal polarization.
  • the sector antenna 10 to which the second embodiment is applied differs in the antenna unit 110 in the sector antenna 10 to which the first embodiment is applied. Therefore, below, it explains focusing on antenna unit 110 which is a different portion, and omits the explanation of the same portion.
  • FIG. 5 is a diagram for explaining an example of the configuration of a sector antenna 10 to which the second embodiment is applied. Similar to FIG. 2, in FIG. 5, the sector antenna 10 is placed sideways and is shown in a perspective view as viewed from an oblique direction.
  • the sector antenna 10 includes an array antenna 100 including antenna units 110-1, 110-2, and 110-3 arranged in the vertical direction, and a radome 500 that houses the array antenna 100 so as to wrap it. Also in FIG. 5, the radome 500 is shown by a broken line so that the array antenna 100 provided inside the radome 500 can be seen.
  • the antenna unit 110 includes two low frequency vertical polarization antennas 120a and 120b for transmitting and receiving vertical polarization in the low frequency band. And two high frequency vertically polarized antennas 130a and 130b for transmitting and receiving vertically polarized waves in a high frequency band. Furthermore, the antenna unit 110 includes one low frequency horizontal polarization antenna 180 for transmitting and receiving horizontal polarization in the low frequency band, and two high frequency horizontal polarization antennas 190a and 190b for transmitting and receiving horizontal polarization in the high frequency band. And have. When the high frequency horizontal polarization antennas 190a and 190b are not distinguished from one another, they are referred to as the high frequency horizontal polarization antenna 190.
  • the low frequency horizontal polarization antenna 180 has the same shape as the low frequency vertical polarization antenna 120, and is obtained by rotating the low frequency vertical polarization antenna 120 by 90 ° on the low frequency reflector 150.
  • the element part (part corresponding to the element parts 121 and 122 of FIG. 3A) of the low frequency horizontal polarization antenna 180 is an example of the third dipole antenna.
  • the height from the low frequency reflector 150 of this element portion is an example of the third distance.
  • the high frequency horizontal polarization antenna 190 has the same shape as the high frequency vertical polarization antenna 130, and is obtained by rotating the high frequency vertical polarization antenna 130 by 90 ° on the high frequency reflector 160.
  • the element part (part corresponding to the element parts 131 and 132 in FIG. 3B) of the high frequency horizontally polarized wave antenna 190 is an example of the fourth dipole antenna.
  • the height from the low frequency reflector 150 of this element portion is an example of the fourth distance.
  • the low frequency horizontal polarization antenna 180 is a central portion of each of the two high frequency vertical polarization antennas 130a and 130b on the surface side of the low frequency reflector 150 (a portion where the respective element portions 121 and 122 in FIG. Provided between).
  • the high frequency reflection plate 160 is provided on both sides of the low frequency vertical polarization antennas 120a and 120b. Therefore, an opening is provided in the high frequency reflection plate 160, and the other end (refer to FIG. 3) of the conductor portion of the low frequency horizontal polarization antenna 180 (a portion corresponding to the conductors 123 and 124 of FIG. 3A) ) Extend toward the low frequency reflector 150.
  • the high frequency horizontal polarization antenna 190a is on the surface side of the high frequency reflection plate 160, and its element portion (portion corresponding to the element portions 131 and 132 in FIG. 3B) is an element of the high frequency vertical polarization antenna 130a.
  • the units 131 and 132 are configured to be combined with each other. That is, when viewed toward the high frequency reflection plate 160, the element portions 131 and 132 of the high frequency vertical polarization antenna 130a and the element portion of the high frequency horizontal polarization antenna 190a are combined to form a cross.
  • the high frequency vertical polarization antenna 130 b and the high frequency horizontal polarization antenna 190 b are similarly combined.
  • the antenna unit 110, the array antenna 100, and the sector antenna 10 share polarization as well as share frequency. Note that either high frequency or low frequency may be shared by polarization.
  • FIG. 6 is a view for explaining a modification of the sector antenna 10 to which the second embodiment is applied.
  • the sector antenna 10 is configured by adding a parasitic element to the sector antenna 10 of FIG.
  • Each antenna unit 110 is similar to the antenna unit 110 to which the first embodiment shown in FIG. 4 is applied, the parasitic element 171 a for the low frequency vertical polarization antenna 120 a and the low frequency vertical polarization antenna 120 b.
  • Parasitic element 171b, low frequency vertical polarization antenna 120b, parasitic element 172a provided horizontally outside from low frequency vertical polarization antenna 120a, and horizontal outside from low frequency vertical polarization antenna 120b
  • the passive element 172 b is provided.
  • each antenna unit 110 includes a parasitic element 174 similar to the parasitic element 171 a for the low frequency vertical polarization antenna 120 a with respect to the low frequency horizontal polarization antenna 180.
  • the element portion 131 of the high frequency vertical polarization antenna 130 a is located at a predetermined distance away from the high frequency reflector 160 from an antenna in which the high frequency vertical polarization antenna 130 a and the high frequency horizontal polarization antenna 190 a are combined.
  • a cross-shaped parasitic element 176a is provided so as to spread in the direction 132 and the direction of the element part (part corresponding to the element parts 131 and 132 in FIG. 3B) of the high frequency horizontal polarization antenna 190a. It is done.
  • the antenna in which the high frequency vertical polarization antenna 130b and the high frequency horizontal polarization antenna 190b are combined as in the antenna in which the high frequency vertical polarization antenna 130a and the high frequency horizontal polarization antenna 190a are combined, And a parasitic element 176b in the form of a loop.
  • FIG. 7 is a diagram for explaining an example of directivity in a horizontal plane with respect to vertical polarization in the low frequency band of the array antenna 100 to which the second embodiment is applied.
  • FIG. 7A is a view for explaining the array antenna 100
  • FIG. 7B shows directivity in a horizontal plane with respect to vertical polarization in the low frequency band of the array antenna 100 shown in FIG. 7A.
  • FIG. 7A is a view for explaining the array antenna 100
  • FIG. 7B shows directivity in a horizontal plane with respect to vertical polarization in the low frequency band of the array antenna 100 shown in FIG. 7A.
  • the array antenna 100 shown in FIG. 6 was used. That is, the antenna unit 110 in the array antenna 100 is frequency sharing and polarization sharing. Furthermore, a parasitic element is provided.
  • the directivity shown in FIG. 7B is a calculation example at the design frequency f L in the low frequency band. Then, the wavelength of the design frequency f L in the low frequency band is ⁇ L , and the wavelength of the design frequency f H in the high frequency band is ⁇ H.
  • the length W L between the two outer ends in the longitudinal direction of the element portions 121 and 122 of the low frequency vertical polarization antenna 120 is about 0.5 ⁇ L , and the element portions 121 and 122 have a short length.
  • the height H L from the surface of the hand direction of a center of the low frequency reflector 150 is set to about 0.25 [lambda L.
  • the length W H between the outer ends in the longitudinal direction of the element portions 131 and 132 of the high frequency vertically polarized antenna 130 is about 0.5 ⁇ H
  • the width direction of the element portions 131 and 132 the height H H from the surface of the center of the high frequency reflection plate 160 is set to about 0.25 [lambda H.
  • interval D B at the side closer to the high-frequency reflection plate 160 of the conductor 133 and 134 is set to about 0.27 ⁇ H.
  • interval G in the inner side of the low frequency reflection board 150 and the high frequency reflection board 160 is about 5 mm, for example.
  • Low frequency vertically polarized antenna 120a and sends a signal of vertical polarization of the design frequency f L of the low frequency band 120b, horizontally polarized signal design frequency f L of the low frequency band to the low frequency horizontal polarization antenna 180 And transmit a vertically polarized signal of high frequency band design frequency f H to high frequency vertical polarization antennas 130a and 130b, and high frequency horizontal polarization antennas 190a and 190b with high frequency band design frequency f H
  • the signal of horizontal polarization was transmitted, and the directivity in the horizontal plane of the vertical polarization of the design frequency f L in the low frequency band was determined by simulation.
  • the side lobe is suppressed and the back lobe is ⁇ 17 dB as compared with the case of FIG. 8B described later. And small. And the beam width at -3 dB is about 90 °.
  • FIG. 8 is a view for explaining an example of directivity in a horizontal plane with respect to vertical polarization in the low frequency band of the array antenna 100 to which the second embodiment is not applied.
  • FIG. 8 (a) is a diagram for explaining the array antenna 100
  • FIG. 8 (b) shows directivity in a horizontal plane with respect to vertical polarization of the low frequency band of the array antenna 100 shown in FIG. 8 (a).
  • FIG. 8 (a) is a diagram for explaining the array antenna 100
  • FIG. 8 (b) shows directivity in a horizontal plane with respect to vertical polarization of the low frequency band of the array antenna 100 shown in FIG. 8 (a).
  • a high frequency vertical polarization antenna 130c is used instead of the high frequency vertical polarization antennas 130a and 130b shown in FIG. 7A.
  • 130d and high frequency horizontal polarization antennas 190c and 190d are used instead of the high frequency horizontal polarization antennas 190a and 190b, respectively.
  • conductor portions portions corresponding to the conductors 133 and 134 in FIG. 3B are provided perpendicularly to the high frequency reflection plate 160. The same applies to the high frequency horizontally polarized antennas 190c and 190d.
  • the gap (gap) between the conductor parts (parts corresponding to the conductors 133 and 134 in FIG. 3B) of the high frequency vertically polarized antenna 130 is far from the side connected to the element parts 131 and 132 (high frequency reflector 160) There is no difference between the side) and the side close to the high frequency reflection plate 160.
  • the other configuration of the antenna unit 110 is the same as that of the antenna unit 110 of the array antenna 100 to which the second embodiment shown in FIG. 7A is applied.
  • the signals transmitted to the low frequency vertical polarization antennas 120a and 120b and the low frequency horizontal polarization antenna 180, and the signals transmitted to the high frequency vertical polarization antennas 130c and 130d and the high frequency horizontal polarization antennas 190c and 190d are the second signals. This is the same as the case of the array antenna 100 to which the embodiment is applied.
  • the side lobe is large and the back lobe is as large as ⁇ 7 dB as compared with the case of FIG. 7B.
  • the beam width at -3 dB is about 90 °.
  • the conductors 133 and 134 in the high frequency vertical polarization antenna 130 in a direction parallel to the surface, greater than the distance D T of the side spacing D B closer to the high-frequency reflection plate 160 is connected to the element portion 131 and 132 (the side far from the high-frequency reflection plate 160) (wide) is set .
  • the frequency f H of the high frequency band by the high frequency vertical polarization antenna 130 can be suppressed.
  • the vertical polarization of the low frequency band frequency f L from the low frequency vertical polarization antenna 120 induces a current in the high frequency vertical polarization antenna 130, thereby causing a vertical polarization of the frequency f L in the low frequency band. It is considered that the directivity of the wave in the horizontal plane is affected.
  • the current induced in the high frequency vertically polarized antenna 130 is considered to be affected by the electric field generated between the conductor 133 and the conductor 134 of the high frequency vertically polarized antenna 130. Therefore, it is considered effective to reduce the current induced in the low frequency vertical polarization antenna 120 by lowering the electric field strength by widening the distance between the conductor 133 and the conductor 134 in the high frequency vertical polarization antenna 130 (see FIG.
  • the distance D T (see FIG. 3B) between the conductor 133 and the conductor 134 on the side connected to the element portions 131 and 132 in the high frequency vertically polarized antenna 130 (the side far from the high frequency reflector 160) is the high frequency vertical As it is set by the characteristics of the polarization antenna 130, it can not be extended. Accordingly, the distance D B (see FIG. 3B) between the conductor 133 and the conductor 134 on the side closer to the high frequency reflection plate 160 is expanded.
  • the vertical polarization has been described above, the same applies to horizontal polarization.
  • the low frequency vertical polarization antenna 120 and the high frequency vertical antenna 120 can also be used in the frequency sharing array antenna 100 transmitting and receiving vertical polarization described in the first embodiment. Even when the polarization antenna 130 is arranged in a direction intersecting the direction of the vertical polarization, the influence of the vertical polarization of the frequency f L in the low frequency band by the high frequency vertical polarization antenna 130 in the horizontal plane Can be suppressed.
  • the array antenna 100 shown to Fig.7 (a) is equipped with parasitic element 171a, 171b, 172a, 172b, 174, 176a, 176b.
  • the parasitic element matches the impedance of the antenna unit 110 in a wide frequency band, and the directivity of the antenna unit 110, the array antenna 100 and the sector antenna 10, the voltage standing wave ratio (VSWR), etc. It is provided to adjust the characteristics. Therefore, parasitic elements may be provided so that the antenna unit 110, the array antenna 100, and the sector antenna 10 have predetermined characteristics. Therefore, the shape, number, and arrangement of the parasitic elements may be different from the configuration shown in FIG. Further, the parasitic element may not be used.
  • the low frequency vertical polarization antenna 120 and the low frequency horizontal polarization antenna 180 are arranged on the low frequency reflector 150, the high frequency vertical polarization antenna 130 and the high frequency
  • the high frequency vertical polarization antenna 130 and the high frequency By rotating the horizontally polarized antenna 190 by 45 ° on the high frequency reflection plate 160, it is possible to transmit / receive polarized light of ⁇ 45 °.
  • the low frequency vertical polarization antenna 120, the low frequency horizontal polarization antenna 180, the high frequency vertical polarization antenna 130, and the high frequency horizontal polarization antenna 190 are rotated 45 °, ⁇ 45, instead of vertical polarization and horizontal polarization. It will transmit and receive polarized waves. Therefore, "vertical” and “horizontal” may be read as "45 °” and "-45 °". The same is true for polarizations of other angles.
  • SYMBOLS 1 Base station antenna, 2 ... Cell, 3, 3-1 to 3-3 ... Sector, 10, 10-1 to 10-3 ... Sector antenna, 11 ... Main lobe, 20 ... Iron tower, 31, 32 ... Transmission / reception cable , 100, array antenna, 110, 110-1 to 110-3, antenna unit, 120, 120a, 120b, low frequency vertical polarization antenna, 121, 122, 131, 132, element part, 123, 124, 133, 134 ... Conductors 130, 130a, 130b, 130c, 130d ... High frequency vertically polarized antenna, 150 ... Low frequency reflector, 160 ...
  • High frequency reflector 171a, 171b, 172a, 172b, 173a, 173b, 174, 176a, 176b ...
  • Parasitic element 180 ... low frequency horizontal polarization antenna, 190, 190a, 190b, 190c, 190d ... high frequency Flat polarized antenna, 500 ... radome

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

L'invention concerne une antenne qui inclut une pluralité d'éléments d'antenne qui émettent et reçoivent des ondes radio dans une pluralité de bandes de fréquences, et qui permet la réduction de taille tandis que l'influence que subit la directivité ou similaire de l'émission ou de la réception d'ondes radio dans certaines bandes de fréquence depuis un élément d'antenne qui émet et reçoit à une fréquence supérieure aux fréquences dans la bande de fréquence est limitée. Une unité d'antenne (110) qui constitue l'antenne comporte une antenne à basse fréquence qui est disposée sur la surface d'une plaque réfléchissante à basse fréquence (150) et émet et reçoit des ondes radio dans une bande à basse fréquence, et une antenne à haute fréquence qui émet et reçoit des ondes radio dans une bande à haute fréquence, et comporte en outre des conducteurs qui sont disposés respectivement vers la plaque réfléchissante depuis deux parties d'élément de l'antenne à haute fréquence, la distance entre elles dans une direction parallèle à la plaque réfléchissante à basse fréquence (150) étant plus longue du côté proche de la plaque réfléchissante à basse fréquence (150) que du côté qui en est éloigné.
PCT/JP2014/072158 2013-09-02 2014-08-25 Antenne et antenne à secteurs WO2015029946A1 (fr)

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CN107579355A (zh) * 2017-08-15 2018-01-12 佛山市波谱达通信科技有限公司 一种中型双频垂直面大张角射灯天线
CN108183322A (zh) * 2017-12-28 2018-06-19 东莞市仁丰电子科技有限公司 一种多波段三合一天线
CN110622352A (zh) * 2017-05-16 2019-12-27 日本电业工作株式会社 天线、阵列天线、扇形天线以及偶极天线
EP3577698A4 (fr) * 2017-02-03 2020-11-25 Commscope Technologies LLC Antennes à petites cellules appropriées pour un fonctionnement en mimo
US10924169B2 (en) 2017-07-18 2021-02-16 Commscope Technologies Llc Small cell antennas suitable for MIMO operation
US11245199B2 (en) * 2017-05-16 2022-02-08 Huawei Technologies Co., Ltd. Antenna
WO2023016640A1 (fr) * 2021-08-11 2023-02-16 Telefonaktiebolaget Lm Ericsson (Publ) Antenne multibande et station de base
FR3131107A1 (fr) * 2021-12-20 2023-06-23 Tdf Dispositif antennaire à deux réseaux de dipôles et systeme de communication associe

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JP2018007032A (ja) * 2016-07-01 2018-01-11 株式会社東芝 アンテナ装置
WO2018047234A1 (fr) * 2016-09-06 2018-03-15 日本電業工作株式会社 Dispositif d'antenne et système de communication mimo
US10553930B2 (en) * 2016-12-30 2020-02-04 Symantec Corporation Antenna system for wireless communication devices and other wireless applications
KR102405013B1 (ko) * 2017-09-06 2022-06-07 삼성전자주식회사 안테나 엘리먼트간 격리 구조를 갖는 안테나 장치
JP6470382B1 (ja) * 2017-11-09 2019-02-13 電気興業株式会社 周波数共用アレイアンテナ
WO2020072880A1 (fr) 2018-10-05 2020-04-09 Commscope Technologies Llc Antennes de station de base multibande reconfigurables comportant des sous-modules autonomes
JP7095045B2 (ja) * 2020-09-29 2022-07-04 ソフトバンク株式会社 アンテナ装置、測定装置及び測定システム

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US11018416B2 (en) 2017-02-03 2021-05-25 Commscope Technologies Llc Small cell antennas suitable for MIMO operation
EP3577698A4 (fr) * 2017-02-03 2020-11-25 Commscope Technologies LLC Antennes à petites cellules appropriées pour un fonctionnement en mimo
US11336031B2 (en) 2017-05-16 2022-05-17 Nihon Dengyo Kosaku Co., Ltd. Antenna, array antenna, sector antenna, and dipole antenna
CN110622352A (zh) * 2017-05-16 2019-12-27 日本电业工作株式会社 天线、阵列天线、扇形天线以及偶极天线
US11245199B2 (en) * 2017-05-16 2022-02-08 Huawei Technologies Co., Ltd. Antenna
CN110622352B (zh) * 2017-05-16 2021-05-07 日本电业工作株式会社 阵列天线
US11764481B2 (en) 2017-05-16 2023-09-19 Huawei Technologies Co., Ltd. Antenna
US10924169B2 (en) 2017-07-18 2021-02-16 Commscope Technologies Llc Small cell antennas suitable for MIMO operation
CN107579355A (zh) * 2017-08-15 2018-01-12 佛山市波谱达通信科技有限公司 一种中型双频垂直面大张角射灯天线
CN108183322A (zh) * 2017-12-28 2018-06-19 东莞市仁丰电子科技有限公司 一种多波段三合一天线
CN108183322B (zh) * 2017-12-28 2024-02-06 东莞市仁丰电子科技有限公司 一种多波段三合一天线
WO2023016640A1 (fr) * 2021-08-11 2023-02-16 Telefonaktiebolaget Lm Ericsson (Publ) Antenne multibande et station de base
FR3131107A1 (fr) * 2021-12-20 2023-06-23 Tdf Dispositif antennaire à deux réseaux de dipôles et systeme de communication associe
WO2023117192A1 (fr) * 2021-12-20 2023-06-29 Tdf Dispositif antennaire à deux réseaux de dipôles et systeme de communication associe

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