WO2018214427A1 - 高异频隔离宽带双频基站天线阵列 - Google Patents

高异频隔离宽带双频基站天线阵列 Download PDF

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Publication number
WO2018214427A1
WO2018214427A1 PCT/CN2017/111889 CN2017111889W WO2018214427A1 WO 2018214427 A1 WO2018214427 A1 WO 2018214427A1 CN 2017111889 W CN2017111889 W CN 2017111889W WO 2018214427 A1 WO2018214427 A1 WO 2018214427A1
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Prior art keywords
frequency
antenna unit
vibrator
microstrip
base station
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PCT/CN2017/111889
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English (en)
French (fr)
Inventor
章秀银
薛成戴
吴裕锋
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华南理工大学
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Priority to SG11201807435UA priority Critical patent/SG11201807435UA/en
Priority to US16/305,045 priority patent/US10680323B2/en
Publication of WO2018214427A1 publication Critical patent/WO2018214427A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0075—Stripline fed arrays
    • 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
    • H01Q21/24—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/001—Crossed polarisation dual antennas
    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • 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
    • H01Q5/48—Combinations of two or more dipole type antennas
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • 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
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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

Definitions

  • the invention relates to an antenna array, in particular to a high-frequency isolated broadband dual-frequency base station antenna array, belonging to the field of mobile communication.
  • antenna antennas are often required to cover not only multiple frequency bands but also multiple wireless systems.
  • the antennas When designing dual-band or multi-frequency base station array antennas, especially for wide-band dual-band or multi-frequency antennas, the antennas typically have clutter outside the operating band. These out-of-band clutter will cause severe coupling between different frequency bands, and will also seriously affect the antenna's pattern.
  • the invention patent application "a dual-polarization filter antenna with high selectivity and low cross-polarization" realizes a highly selective filter antenna without additional filtering. Unit. However, its selectivity is for adjacent bands that are close to the operating band. When the two operating frequency bands are relatively far apart and the bandwidth is relatively wide, it is difficult to function.
  • the above dual-frequency base station arrays adopt high-low frequency nested antenna schemes, so only two columns of antenna performance can be realized.
  • the object of the present invention is to provide a high-frequency isolated broadband dual-frequency base station antenna array, which has a simple structure and overcomes the above-mentioned prior art multi-frequency base station coupling with each other without introducing an external insertion loss such as a filter. Or the floor is too large, the pattern is unstable.
  • a high-frequency isolated broadband dual-frequency base station antenna array comprising at least one high frequency antenna unit, a low frequency antenna unit and a floor;
  • the high frequency antenna unit When the high frequency antenna unit is one, it is placed on one side of the floor, and when there are a plurality of high frequency antenna units, respectively placed on both sides of the floor, the high frequency antenna unit includes a plurality of vibrator arms and a balun, and the vibrator arm passes between Distributed inductors are connected and fed through the balun;
  • the low frequency antenna unit is placed in the middle of the floor, and the low frequency antenna unit includes a plurality of vibrator arms and a balun.
  • the vibrator arms are connected by a distributed capacitor and fed through a balun.
  • the balun is provided with a feeder and a H.
  • the type of microstrip line branch, the H-type microstrip line branch is connected with the feeder.
  • the high-frequency antenna unit is a single-polarized antenna unit
  • the vibrator arm on the high-frequency antenna unit has two
  • the distributed inductor is a pair of microstrip bending line inductors
  • the two vibrator arms form horizontal polarization.
  • the vibrator arm or the vertically polarized vibrator arm is connected between the two vibrator arms by a pair of microstrip bending line inductances.
  • the high frequency antenna unit is a dual polarized antenna unit
  • the vibrator arm on the high frequency antenna unit has four
  • the distributed inductor is two pairs of microstrip bending line inductors, wherein two vibrator arms form -45
  • the polarized vibrator arm, the -45 degree polarized vibrator arm is connected by a pair of microstrip bend line inductances, the other two vibrator arms form a +45 degree polarized vibrator arm, and the +45 degree polarized vibrator arm passes another pair of micro Connected with a bend line inductance; the two pairs of microstrip bend line inductances are cross-connected.
  • a gap is left between the two adjacent microstrip bending lines on the microstrip bending line inductance, and the microstrip bending line inductance is embedded between the vibrator arms.
  • the high frequency antenna unit further comprises a dielectric plate, and the vibrator arm and the distributed inductor are located in the same layer of the dielectric plate.
  • the low frequency antenna unit is a single polarization antenna unit, and the low frequency antenna unit has two oscillator arms, and the two oscillator arms constitute a horizontally polarized oscillator arm or a vertically polarized oscillator arm; the distributed capacitor is metal The patch is disposed in the middle of the two vibrator arms and is adjacent to the two vibrator arms without contact.
  • the low frequency antenna unit is a dual polarized antenna unit, and the low frequency antenna unit has four vibrator arms, wherein two vibrator arms form a -45 degree polarized vibrator arm, and the other two vibrator arms form a +45 degree pole.
  • the metal patch is a disc-shaped structure, a cross-shaped structure, a rectangular structure or a square star structure.
  • the low frequency antenna unit further comprises a dielectric plate, the vibrator arm is located in one layer of the dielectric plate, and the distributed capacitor is located at another layer of the dielectric plate.
  • the H-shaped microstrip line segment is composed of a horizontal branch and two vertical branches, the horizontal branches are connected with the feeder, and the two vertical branches are connected at both ends of the horizontal branch, and the feeding feeder extends vertically.
  • the high-frequency antenna unit of the present invention connects the vibrator arms through a distributed inductor, and uses the inductive reactance in the low-frequency short-circuit and the high-frequency open-circuit characteristic to change the original resonant current path, thereby realizing the regulation of low-frequency clutter. And suppression, the low-frequency antenna unit connects the vibrator arms through the distributed capacitor, cooperates with the H-type microstrip line branch, and utilizes the characteristics of the capacitive reactance in the low-frequency open circuit and the high-frequency short-circuit to realize the regulation and suppression of the high-frequency clutter.
  • the two types of filter antenna units of the present invention can be combined into a multi-column antenna array under the premise of taking into account the performance and matching performance of the antenna circuit, and the low-frequency antenna unit is placed in the middle of the floor, and when the high-frequency antenna unit is one, it is placed on the floor.
  • the high-frequency antenna unit is one, it is placed on the floor.
  • the high-frequency antenna unit is one, it is placed on the floor.
  • there are a plurality of high-frequency antenna units they are respectively placed on both sides of the floor, and thus arranged, under the small floor, good radiation performance and good matching isolation characteristics can be obtained.
  • the distributed inductor adopts a microstrip bending line inductance, which can suppress the parasitic resonance of the single-polarized or dual-polarized antenna at low frequencies, and the microstrip bending line inductance increases the inductance by folding and reduces
  • the volume and the microstrip bending line inductance have gaps between the two adjacent microstrip bending lines to avoid mutual short circuit and facilitate embedding between the vibrator arms.
  • the distributed inductor and the vibrator arm are located in the same layer of the dielectric plate without affecting the isolation of the antenna polarization, which avoids the lower layer wiring and via holes of the dielectric plate and is convenient for processing.
  • the distributed capacitor uses a metal patch, and the metal patch is located in the middle of the vibrator arm, and the vibrator arm is close to each other without electrical contact, so that the single-polarized or dual-polarized antenna vibrator arm can be conveniently realized. Capacitive coupling between them to achieve harmonic suppression without affecting polarization isolation.
  • the vibrator arm is located in one layer of the dielectric plate, and the distributed capacitor is located in another layer of the dielectric plate, so that the capacitance of the connected vibrator arm can be adjusted by changing the size of the metal patch.
  • avoid short-circuit contact with the vibrator arm thus achieving clutter control and improving antenna matching adjustment, while avoiding via holes and facilitating processing.
  • the horizontal branches of the H-type microstrip line branches on the balun are connected to the feeder lines, and the two vertical branches are connected at both ends of the horizontal branches, and the feeding lines are vertically extended to be compact.
  • the volume is integrated on the balun, which has the advantages of miniaturization and easy processing.
  • the H-type microstrip line branch has wideband harmonic suppression characteristics, which can suppress the high frequency harmonics of the balun, and can be adjusted with the metal patch to adjust the connection position.
  • the length of the two vertical branches facilitates the control and suppression of the overall high-frequency harmonics of the low-frequency antenna unit, and also becomes part of the matching network, which facilitates antenna impedance matching without occupying extra volume.
  • the polarized oscillator arm is The matching difference caused by the difference of the feeding position can also be compensated by adjusting the position of the H-shaped microstrip line branch.
  • FIG. 1 is a top plan view of a high-frequency isolated broadband dual-frequency dual-polarization base station antenna array according to Embodiment 1 of the present invention.
  • FIG. 2 is a front structural diagram of a high-frequency isolated broadband dual-band dual-polarization base station antenna array according to Embodiment 1 of the present invention.
  • FIG. 3 is a perspective exploded structural view of a high frequency antenna unit in a high-frequency isolated broadband dual-frequency dual-polarization base station antenna array according to Embodiment 1 of the present invention.
  • Figure 4 is an enlarged view of a portion A in Figure 3.
  • FIG. 5 is a perspective exploded structural view of a low frequency antenna unit in a high-frequency isolated broadband dual-frequency dual-polarization base station antenna array according to Embodiment 1 of the present invention.
  • FIG. 6 is a S-parameter graph of a high-interval-isolated broadband dual-frequency dual-polarization base station antenna array according to Embodiment 1 of the present invention.
  • FIG. 7 is a high inter-frequency isolated broadband dual-frequency dual-polarization base station antenna array according to Embodiment 1 of the present invention; Simulation result graph of high frequency horizontal direction pattern.
  • FIG. 8 is a simulation result diagram of a low-frequency horizontal direction pattern of a high-interval-isolated broadband dual-frequency dual-polarization base station antenna array according to Embodiment 1 of the present invention.
  • FIG. 9 is a top plan view of a high-frequency isolated broadband dual-band dual-polarization base station antenna array according to Embodiment 2 of the present invention.
  • the embodiment provides a high-frequency isolated broadband dual-band dual-polarization base station antenna array, including a first high-frequency antenna unit 1, a second high-frequency antenna unit 2, and a low-frequency antenna unit. 3 and the floor 4, that is, the embodiment is a three-column antenna array. As can be seen from FIG. 1 and FIG.
  • three antenna elements are placed on the floor 4 and are located on the same horizontal plane, and the first high-frequency antenna unit 1 and the second high frequency antenna unit 2 are respectively placed on both sides of the floor 4, and the low frequency antenna unit 3 is placed in the middle of the floor 4, so that it can obtain good radiation performance and good matching isolation characteristics under a small floor; Due to the difference in frequency, the heights of the vibrator arms of the three antenna elements are also different.
  • the middle low frequency band antenna unit 3 is low frequency, so the height is relatively high, and the first high frequency antenna unit 1 and the second high frequency antenna unit 2 on both sides are The high frequency is therefore relatively low in height; the first high frequency antenna unit 1, the second high frequency antenna unit 2 and the low frequency antenna unit 3 are both dual polarization antenna units.
  • the first high frequency antenna unit 1 and the second high frequency antenna unit 2 operate in a high frequency band (eg 1710-2690MHz), and the same structural dimensions, taking one of the high frequency antenna units as an example, as can be seen from FIG. 3 and FIG. 4, including the first dielectric plate 5, the first vibrator arm 6, the second vibrator arm 7, The third vibrator arm 8, the fourth vibrator arm 9 and the first balun 10 are connected by a distributed inductor between the four vibrator arms, and are fed by the first balun 10, the first balun 10 being double Polarized balun; the distributed inductor is two pairs of microstrip bending line inductances, that is, four microstrip bending line inductances, respectively being the first microstrip bending line inductance 11, the second microstrip bending line inductance 12, and the third The microstrip bend line inductance 13 and the fourth microstrip bend line inductance 14.
  • a high frequency band eg 1710-2690MHz
  • the first vibrator arm 6 and the third vibrator arm 8 constitute a -45 degree polarized vibrator arm
  • the first microstrip bending line inductance 11 and the third microstrip bending line inductance 13 constitute a pair of microstrip bends.
  • the line inductance is connected to the -45 degree polarized vibrator arm, which can suppress the parasitic resonance of the -45 degree polarized antenna at low frequencies; the second vibrator arm 7 and the fourth vibrator arm 9 form a +45 degree polarized vibrator arm, and the second microstrip
  • the bending line inductance 12 and the fourth microstrip bending line inductance 14 are connected to the +45 degree polarized vibrator arm, which can suppress the parasitic resonance of the +45 degree polarized antenna at low frequencies, and thus, the first high frequency antenna unit 1 and the second highest
  • the ⁇ 45 degree polarization filtering of the frequency antenna unit 2 can be independently implemented; the four microstrip bending line inductances are folded to increase the inductance and reduce the volume, and the four microstrip bending line inductances are adjacent to the two microstrips. There is a gap between the bending lines to avoid mutual short circuit. Due to the gap, it is convenient to embed the four microstrip bending line inductances between
  • the two pairs of microstrip bending line inductors can be cross-connected without additional vias, and the two pairs of microstrip bending line inductances and the ⁇ 45 degree polarized vibrator arms are located on the same layer of the first dielectric plate 5, and this embodiment is located at the same
  • the upper layer of a dielectric plate 5 does not affect the isolation of the two ⁇ 45 degree polarized vibrator arms of the antenna, which avoids the underlying traces and vias of the first dielectric plate 5, facilitating processing.
  • the high-frequency antenna unit of the present embodiment connects the four vibrator arms through two pairs of microstrip bending line inductances, and the inductive reactance is used in the low-frequency short-circuit and the high-frequency open-circuit characteristic to change the original resonance.
  • the current path enables regulation and suppression of low frequency clutter.
  • the low frequency antenna unit 3 operates in a low frequency band (such as 690-960 MHz) lower than the working frequency bands of the two high frequency antenna units.
  • the second dielectric board 15 and the fifth vibrator arm 16 are included.
  • the distribution of the six-vibrator arm 17, the seventh vibrator arm 18, the eighth vibrator arm 19, and the second balun 20, the fifth vibrator arm 16, the sixth vibrator arm 17, the seventh vibrator arm 18, and the eighth vibrator arm 19 The capacitors are connected and fed through the second balun 20; the distributed capacitor is a metal patch 21.
  • the fifth vibrator arm 16 and the seventh vibrator arm 18 constitute a -45 degree polarized vibrator
  • the arm, the sixth vibrator arm 17 and the eighth vibrator arm 19 constitute a +45 degree polarized vibrator arm;
  • the metal patch 21 has a disc-shaped structure, and a disc-shaped structure is taken as an example, which is disposed in the middle of the four vibrator arms And close to the four vibrator arms without contact, the capacitive coupling between the two polarized vibrator arms of ⁇ 45 degrees can be achieved, thereby achieving harmonic suppression without affecting polarization isolation.
  • the ⁇ 45 degree polarized vibrator arm is located in one of the second dielectric plates 15, and the disc-shaped structure is located in another layer of the second dielectric plate 15.
  • the ⁇ 45 degree polarized vibrator arm of the present embodiment is located on the second dielectric plate 15.
  • the upper layer, the disc-shaped structure is located in the lower layer of the second dielectric plate 15, so that it is convenient to adjust the capacitance of the connected vibrator arm by changing the size of the disc-shaped structure, and avoid contact short circuit with the vibrator arm, thereby realizing clutter control. And improve antenna matching adjustment, while also avoiding vias for easy processing.
  • the second balun 20 is a dual-polarized balun having four faces, and each of the two adjacent faces is provided with a feed line 22 and an H-type microstrip line branch 23, and the H-type microstrip line branch 23 is horizontal.
  • the branch 24, the first vertical branch 25 and the second vertical branch 26 are formed.
  • the horizontal branch 24 is connected to the feed line 22, and the first vertical branch 25 and the second vertical branch 26 are connected at both ends of the horizontal branch 24 and are attached to the feed line 22 vertically.
  • the extension is integrated into the second balun 20 in a compact volume, and has the advantages of miniaturization and easy processing; the H-type microstrip line segment 23 has wideband harmonic suppression characteristics, and can suppress the high frequency harmonic of the second balun 20
  • the overall high-frequency harmonic control and suppression of the low-frequency antenna unit 3 can be conveniently realized by adjusting the connection position and the length of the two vertical branches, and also becomes part of the matching network to facilitate the implementation of the antenna.
  • the impedance is matched without occupying extra volume; the matching difference of the ⁇ 45 degree polarized vibrator arm of the low frequency antenna unit 3 due to the difference of the feeding position can also be compensated by adjusting the position of the H-shaped microstrip line branch 23 .
  • the low frequency antenna unit 3 of the present embodiment connects the four vibrator arms through the disc-shaped structure, and cooperates with the H-type microstrip line branch 23 of the second balun 20, using the capacitive reactance at the low frequency. Open circuit, high-frequency short-circuit characteristics, to achieve the regulation and suppression of high-frequency clutter.
  • This embodiment provides harmonic suppression of more than 40% bandwidth.
  • high isolation is achieved in the case where the distance of the inter-frequency antenna unit is small and the floor is small, and the filter insertion is avoided.
  • Loss while achieving a stable pattern in a wide frequency band, and the decoupling structure does not additionally increase the volume of the antenna unit; due to good clutter suppression performance, in the present embodiment, two high frequency antenna elements and low frequency The spacing between the antenna elements is only 100mm, and the width of the floor 4 is 280mm, thus ensuring isolation and radiation performance.
  • the high-frequency isolated broadband dual-frequency suppression harmonic is provided in this embodiment.
  • the S-parameters of the dual-polarized base station antenna array can be seen that the high-frequency clutter of the low-frequency (690-960MHz) antenna unit is suppressed, and the coupling of the high-frequency antenna unit in the 1710-2690MHz frequency band is reduced to below -40dB, and Array comparison, boosted by more than 30dB.
  • the coupling of the low-frequency antenna unit in the 690-960MHz band is reduced to below -30dB, which is improved by more than 20dB compared with the conventional array.
  • a high-frequency horizontal direction pattern of a high-frequency-isolated broadband dual-frequency dual-polarization base station antenna array for suppressing harmonics according to an embodiment of the present invention is selected, and four representative groups of 1710-2690 MHz are selected.
  • Frequency point pattern It can be seen that the 10 dB lobe basically satisfies the lobe width of 120 degrees, and the 3 dB lobe width is also between 56-71 degrees.
  • 0 degree cross polarization is greater than 12 dB, and ⁇ 60 degree cross polarization is greater than 8 dB.
  • a low-frequency horizontal direction pattern of a high-frequency-isolated broadband dual-frequency dual-polarization base station antenna array for suppressing harmonics according to an embodiment of the present invention is selected, and four representative 690-960 MHz are selected.
  • Frequency point pattern It can be seen that the 10 dB lobe basically satisfies the lobe width of 120 degrees, and the 3 dB lobe width is also between 64-71 degrees.
  • 0 degree cross polarization is greater than 12 dB, and ⁇ 60 degree cross polarization is greater than 8 dB.
  • the antenna array is suitable for the frequency band of 690-960MHz and the band of 1710-2690MHz, with more than 40% of the clutter suppression performance, and the coupling degree of the high and low frequency antenna elements are below -30dB.
  • the antenna unit realizes the characteristics that the pattern is not distorted, and basically satisfies the requirements of the base station pattern.
  • the high-frequency isolated broadband dual-frequency dual-polarization base station antenna array of the present embodiment includes a high-frequency antenna unit 1, a low-frequency antenna unit 2, and a floor 3, that is, a two-column antenna array in this embodiment.
  • Two antenna elements are placed on the floor 3 and are located on the same horizontal plane, the high frequency antenna unit 1 is placed on one side of the floor 3, and the low frequency antenna unit 2 is placed in the middle of the floor 3.
  • the low frequency antenna unit 2 is a dual polarization antenna unit, and the specific structure Same as Example 1.
  • the embodiment provides a high-frequency-isolated broadband dual-frequency single-polarization base station antenna array.
  • the first high-frequency antenna unit 1 and the second high-frequency antenna unit 2 are single-polarized antenna units, that is, two oscillator arms.
  • the distributed inductor is a pair of microstrip bending line inductors, and the two vibrator arms form a horizontally polarized vibrator arm or a vertically polarized vibrator arm, and the two vibrator arms are connected by a pair of microstrip bending line inductors;
  • the low frequency antenna unit 3 is a dual polarized antenna unit, that is, there are two vibrator arms, and the two vibrator arms constitute a horizontally polarized vibrator arm or a vertically polarized vibrator arm;
  • the distributed capacitor is a metal patch, and the metal patch
  • the piece is disposed in the middle of the two vibrator arms and is adjacent to the two vibrator arms without contact;
  • the first balun and the second balun are single-polarized baluns
  • the main features of this embodiment are: the first high frequency antenna unit 1 and the second high frequency antenna unit 2 are single polarization antenna units, the low frequency antenna unit 3 is a dual polarization antenna unit; or the first high frequency antenna unit 1 and The second high frequency antenna unit 2 is a dual polarization antenna unit, and the low frequency antenna unit 3 is a single polarization antenna unit. The rest are the same as in the first embodiment.
  • the present invention is applicable to the field of wireless mobile communication base stations, and can be applied to receiving and transmitting devices of various wireless communication systems. Due to the filtering characteristics of the present invention, it is particularly suitable for wide and complex multi-band multi-standard communication scenarios. In the 690-960MHz and 1710-2690MHz base station antennas; while benefiting from the integration of filtering characteristics and radiation characteristics, the present invention is also applicable to the integration and integration of wireless mobile communication system equipment, reducing design requirements, and improving communication equipment. The ability to resist adjacent frequency interference.
  • the antenna array may also be four or more antenna arrays, and the microstrip bending line inductance may also be other.
  • the metal patch may also be in the shape of a cross-shaped structure, a rectangular structure, a quadrangular star structure, etc., and any one skilled in the art can disclose the technical solution according to the patent of the present invention within the scope disclosed by the present invention. Equivalent substitutions or changes to the inventive concept are within the scope of the invention.

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Abstract

本发明公开了一种高异频隔离宽带双频基站天线阵列，包括至少一个高频天线单元、一个低频天线单元和地板；高频天线单元为一个时，置于地板的一边，高频天线单元为多个时，分别置于地板的两边，包括多个振子臂和巴伦，振子臂之间通过分布式电感进行连接，并通过巴伦进行馈电；低频天线单元置于地板中间，包括多个振子臂和巴伦，振子臂之间通过分布式电容进行连接，并通过巴伦进行馈电，该巴伦上设有馈线和H型微带线枝节，H型微带线枝节与馈线连接。本发明在不级联滤波器的情况下，实现了在异频天线单元距离较小，地板较小的情况下的高隔离度，避免了滤波器插损，同时实现了在宽频带内的稳定方向图，而且去耦结构并不额外增加天线单元的体积。

Description

高异频隔离宽带双频基站天线阵列 技术领域
本发明涉及一种天线阵列，尤其是一种高异频隔离宽带双频基站天线阵列，属于移动通信领域。
背景技术
随着移动通信技术的飞速发展，在基站天线建设中往往要求阵列天线不仅能够覆盖多个频段，而且能够支持多种无线制式的系统。在设计双频或者多频基站阵列天线时，尤其是宽频带双频或多频天线时，天线通常会在工作频段之外存在杂波。而这些带外杂波会造成不同频段之间的严重耦合，同时也会严重影响天线的方向图。
传统的双频双极化基站天线为了实现良好的异频隔离需要级联滤波器或者合路器/双工器。公开号为CN 103036073的发明专利申请《双频双极化天线》就采用了级联合路器的方案，实现两个不同频段天线的隔离，然而会带来额外的损耗以及增加天线的体积和设计复杂度。另外一种方案是采用滤波天线，即将辐射体和滤波性能相结合的方案。公开号为CN 202076403的实用新型专利《一种加载滤波器的双频双极化天线阵子》中，就在馈线上引入四分之一波长的枝节来实现不同频段的抑制，但是不能提供宽带的抑制，只能适合窄带应用。华南理工大学专利公开号为CN 105720364A的发明专利申请《一种具有高选择性和低交叉极化的双极化滤波天线》就实现了一种高选择性的滤波天线，并且不需要额外引入滤波器单元。但是，其选择性是针对与工作频段相近的邻近频段。当两个工作频段相隔比较远，带宽比较宽时，就难以起作用。以上的双频基站阵列，都是采用高低频嵌套的天线方案，因此只能实现两列天线性能。
发明内容
本发明的目的是提供一种高异频隔离宽带双频基站天线阵列，该天线阵列结构简单，在不引入滤波器等外插损情况下，克服上述现有技术中多频基站相互间耦合大或地板过大，方向图不稳定的缺陷。
本发明的目的可以通过采取如下技术方案达到：
高异频隔离宽带双频基站天线阵列，包括至少一个高频天线单元、一个低频天线单元和地板；
所述高频天线单元为一个时，置于地板的一边，高频天线单元为多个时，分别置于地板的两边，高频天线单元包括多个振子臂和巴伦，振子臂之间通过分布式电感进行连接，并通过巴伦进行馈电；
所述低频天线单元置于地板中间，低频天线单元包括多个振子臂和巴伦，振子臂之间通过分布式电容进行连接，并通过巴伦进行馈电，该巴伦上设有馈线和H型微带线枝节，H型微带线枝节与馈线连接。
优选的，所述高频天线单元为单极化天线单元，高频天线单元上的振子臂有两个，所述分布式电感为一对微带弯折线电感，两个振子臂构成水平极化振子臂或垂直极化振子臂，两个振子臂之间通过一对微带弯折线电感进行连接。
优选的，所述高频天线单元为双极化天线单元，高频天线单元上的振子臂有四个，所述分布式电感为两对微带弯折线电感，其中两个振子臂构成-45度极化振子臂，-45度极化振子臂通过一对微带弯折线电感进行连接，另外两个振子臂构成+45度极化振子臂，+45度极化振子臂通过另一对微带弯折线电感进行连接；所述两对微带弯折线电感之间交叉连接。
优选的，所述微带弯折线电感上两两相邻的微带弯折线之间留有间隙，且微带弯折线电感嵌入到振子臂之间。
优选的，所述高频天线单元还包括介质板，所述振子臂和分布式电感位于介质板的同一层。
优选的，所述低频天线单元为单极化天线单元，低频天线单元上的振子臂有两个，两个振子臂构成水平极化振子臂或垂直极化振子臂；所述分布式电容为金属贴片，所述金属贴片设置在两个振子臂的中间，且与两个振子臂相靠近而无接触。
优选的，所述低频天线单元为双极化天线单元，低频天线单元上的振子臂有四个，其中两个振子臂构成-45度极化振子臂，另外两个振子臂构成+45度极化振子臂；所述分布式电容为金属贴片，所述金属贴片设置在 四个振子臂的中间，且与四个振子臂相靠近而无接触。
优选的，所述金属贴片为圆盘形结构、十字形结构、矩形结构或四角星形结构。
优选的，所述低频天线单元还包括介质板，所述振子臂位于介质板的其中一层，所述分布式电容位于介质板的另一层。
优选的，所述H型微带线枝节由水平枝节和两个垂直枝节组成，水平枝节与馈线连接，两个垂直枝节连接在水平枝节的两端，并贴合馈线垂直延伸。
本发明相对于现有技术具有如下的有益效果：
1、本发明的高频天线单元通过分布式电感将振子臂之间进行连接，利用感性电抗在低频短路，高频开路的特性，改变了原来的谐振电流路径，实现了对低频杂波的调控和抑制，低频天线单元通过分布式电容将振子臂之间进行连接，协同H型微带线枝节，利用容性电抗在低频开路，高频短路的特性，实现对高频杂波的调控和抑制，在不级联滤波器的情况下，实现了在异频天线单元距离较小，地板较小的情况下的高隔离度，避免了滤波器插损，同时实现了在宽频带内的稳定方向图，而且去耦结构并不额外增加天线单元的体积。
2、本发明的两种滤波天线单元在兼顾天线电路性能和匹配性能的前提下，可以组合成多列天线阵，低频天线单元置于地板中间，高频天线单元为一个时，置于地板的一边，高频天线单元为多个时，分别置于地板的两边，如此安排，可以在较小地板下，获得良好的辐射性能和良好的匹配隔离特性。
3、本发明的高频天线单元中，分布式电感采用微带弯折线电感，可以抑制单极化或双极化天线在低频的寄生谐振，微带弯折线电感通过折叠来增加电感量并减少体积，同时微带弯折线电感上两两相邻的微带弯折线之间留有间隙，避免互相接触短路，方便嵌入到振子臂之间。
4、本发明的高频天线单元中，分布式电感和振子臂位于介质板的同一层，而不影响天线极化的隔离，这避免了介质板下层走线和过孔，便于加工。
5、本发明的低频天线单元中，分布式电容采用金属贴片，金属贴片位于振子臂中间，与振子臂互相靠近而无电气接触，可以实现方便实现单极化或双极化天线振子臂之间的容性耦合，从而实现谐波抑制而不影响极化隔离。
6、本发明的低频天线单元中，振子臂位于介质板的其中一层，分布式电容位于介质板的另一层，如此可以方便通过改变金属贴片的大小，来调节连接振子臂的电容大小，同时避免和振子臂接触短路，从而实现杂波控制和改善天线匹配调整，同时也避免过孔，便于加工。
7、本发明的低频天线单元中，在巴伦上的H型微带线枝节的水平枝节与馈线连接，两个垂直枝节连接在水平枝节的两端，并贴合馈线垂直延伸，以紧凑的体积集成在巴伦上，具有小型化和易于加工的优点；H型微带线枝节具有宽带谐波抑制特性，可以抑制巴伦的高频谐波，再配合金属贴片，可以通过调整连接位置和两个垂直枝节的长度，方便地实现低频天线单元的整体高频谐波的控制和抑制，此外还成为匹配网络的一部分，方便实现天线阻抗匹配，而不占用额外体积，极化振子臂由于馈电位置的不同造成的匹配差异性，也可以通过调整H型微带线枝节位置来方便补偿。
附图说明
图1为本发明实施例1的高异频隔离宽带双频双极化基站天线阵列俯视结构图。
图2为本发明实施例1的高异频隔离宽带双频双极化基站天线阵列正面结构图。
图3为本发明实施例1的高异频隔离宽带双频双极化基站天线阵列中高频天线单元的立体分解结构图。
图4为图3中A处的放大图。
图5为本发明实施例1的高异频隔离宽带双频双极化基站天线阵列中低频天线单元的立体分解结构图。
图6为本发明实施例1的高异频隔离宽带双频双极化基站天线阵列的的S参数曲线图。
图7为本发明实施例1的高异频隔离宽带双频双极化基站天线阵列的 高频水平方向方向图的仿真结果图。
图8为本发明实施例1的高异频隔离宽带双频双极化基站天线阵列的低频水平方向方向图的仿真结果图。
图9为本发明实施例2的高异频隔离宽带双频双极化基站天线阵列俯视结构图。
其中，1-第一高频天线单元，2-第二高频天线单元，3-低频天线单元，4-地板，5-介质板，6-第一振子臂，7-第二振子臂，8-第三振子臂，9-第四振子臂，10-第一巴伦，11-第一微带弯折线电感，12-第二微带弯折线电感，13-第三微带弯折线电感，14-第四微带弯折线电感，15-第二介质板，16-第五振子臂，17-第六振子臂，18-第七振子臂，19-第八振子臂，20-第二巴伦，21-金属贴片，22-馈线，23-H型微带线枝节，24-水平枝节，25-第一垂直枝节，26-第二垂直枝节。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例1：
如图1～图5所示，本实施例提供了一种高异频隔离宽带双频双极化基站天线阵列，包括第一高频天线单元1、第二高频天线单元2、低频天线单元3和地板4，即本实施例是三列天线阵列，从图1和图2中可以看到，三个天线单元均置于地板4上，且位于同一水平面，所述第一高频天线单元1和第二高频天线单元2分别置于地板4的两边，低频天线单元3置于地板4的中间，如此安排，可以在较小地板下，获得良好的辐射性能和良好的匹配隔离特性；由于频率的不同，三个天线单元的振子臂高度也有所不同，中间的低频频段天线单元3为低频故高度比较高，而两边的第一高频天线单元1、第二高频天线单元2为高频，因此高度比较低；第一高频天线单元1、第二高频天线单元2和低频天线单元3均为双极化天线单元。
所述第一高频天线单元1和第二高频天线单元2工作于高频段(如 1710-2690MHz)，且结构尺寸相同，以其中一个高频天线单元为例，从图3和图4中可以看到，包括第一介质板5、第一振子臂6、第二振子臂7、第三振子臂8、第四振子臂9和第一巴伦10，四个振子臂之间通过分布式电感进行连接，并通过第一巴伦10进行馈电，第一巴伦10为双极化巴伦；所述分布式电感为两对微带弯折线电感，即四个微带弯折线电感，分别为第一微带弯折线电感11、第二微带弯折线电感12、第三微带弯折线电感13和第四微带弯折线电感14。
在本实施例中，第一振子臂6和第三振子臂8构成-45度极化振子臂，第一微带弯折线电感11和第三微带弯折线电感13构成一对微带弯折线电感连接-45度极化振子臂，可以抑制-45度极化的天线在低频的寄生谐振；第二振子臂7和第四振子臂9构成+45度极化振子臂，第二微带弯折线电感12和第四微带弯折线电感14连接+45度极化振子臂，可以抑制+45度极化的天线在低频的寄生谐振，至此，第一高频天线单元1和第二高频天线单元2的±45度的极化滤波可以分别独立实现；四个微带弯折线电感通过折叠来增加电感量并减少体积，同时四个微带弯折线电感上两两相邻的微带弯折线之间留有间隙，避免互相接触短路，由于存在间隙，方便将四个微带弯折线电感嵌入到四个振子臂之间。
两对微带弯折线电感之间可以交叉连接，无需额外过孔，同时两对微带弯折线电感和±45度极化振子臂位于第一介质板5的同一层，本实施例均位于第一介质板5的上层，而不影响天线两个±45度极化振子臂的隔离，这避免了第一介质板5的下层走线和过孔，便于加工。
从以上所述可知，本实施例的高频天线单元通过两对微带弯折线电感将四个振子臂之间进行连接，利用感性电抗在低频短路，高频开路的特性，改变了原来的谐振电流路径，实现了对低频杂波的调控和抑制。
所述低频天线单元3工作于低于两个高频天线单元工作频段的低频段(如690-960MHz)，从图5中可以看到，包括第二介质板15、第五振子臂16、第六振子臂17、第七振子臂18、第八振子臂19和第二巴伦20，第五振子臂16、第六振子臂17、第七振子臂18和第八振子臂19之间通过分布式电容连接，并通过第二巴伦20进行馈电；所述分布式电容为金属贴片21。
在本实施例中，第五振子臂16和第七振子臂18构成-45度极化振子 臂，第六振子臂17和第八振子臂19构成+45度极化振子臂；金属贴片21为圆盘形结构、，以圆盘形结构为例，其设置在四个振子臂的中间，且与四个振子臂相靠近而无接触，可以实现±45度两种极化振子臂之间的容性耦合，从而实现谐波抑制而不影响极化隔离。
±45度极化振子臂位于第二介质板15的其中一层，圆盘形结构位于第二介质板15的另外一层，本实施例的±45度极化振子臂位于第二介质板15的上层，圆盘形结构位于第二介质板15的下层，如此可以方便通过改变圆盘形结构的大小，来调节连接振子臂的电容大小，同时避免和振子臂接触短路，从而实现杂波控制和改善天线匹配调整，同时也避免过孔，便于加工。
第二巴伦20为双极化巴伦，有四个面，在任意两个相邻的面上分别设有一馈线22和一H型微带线枝节23，H型微带线枝节23由水平枝节24、第一垂直枝节25和第二垂直枝节26组成，水平枝节24与馈线22连接，第一垂直枝节25和第二垂直枝节26连接在水平枝节24的两端，并贴合馈线22垂直延伸，以紧凑的体积集成在第二巴伦20上，具有小型化和易于加工的优点；H型微带线枝节23具有宽带谐波抑制特性，可以抑制第二巴伦20的高频谐波，再配合圆盘形结构，可以通过调整连接位置和两个垂直枝节的长度，方便地实现低频天线单元3的整体高频谐波的控制和抑制，此外还成为匹配网络的一部分，方便实现天线阻抗匹配，而不占用额外体积；低频天线单元3的±45度极化振子臂由于馈电位置的不同造成的匹配差异性，也可以通过调整H型微带线枝节23位置来方便补偿。
从以上所述可知，本实施例的低频天线单元3通过圆盘形结构将四个振子臂之间进行连接，协同第二巴伦20的H型微带线枝节23，利用容性电抗在低频开路，高频短路的特性，实现对高频杂波的调控和抑制。
本实施例提供超过40％带宽的谐波抑制，在不级联滤波器的情况下，实现了在异频天线单元距离较小，地板较小的情况下的高隔离度，避免了滤波器插损，同时实现了在宽频带内的稳定方向图，而且去耦结构并不额外增加天线单元的体积；由于具有良好的杂波抑制性能，在本实施例中，两个高频天线单元与低频天线单元之间的间隔仅仅为100mm，地板4的宽度为280mm，这样就可以保证隔离和辐射性能。
如图6所示，为本实施例提供的一种抑制谐波的高异频隔离宽带双频 双极化基站天线阵列的S参数，可以看出低频(690-960MHz)天线单元的高频杂波被抑制后，对高频天线单元在1710-2690MHz频段的耦合降低到-40dB以下，和普通阵列对比，提升超过30dB。高频(1710-2690MHz)天线单元的低频杂波被抑制后，对低频天线单元在690-960MHz频段的耦合降到-30dB以下，和普通阵列对比，提升超过了20dB。
如图7所示，为本发明实施例提供的一种抑制谐波的高异频隔离宽带双频双极化基站天线阵列的高频水平方向方向图，选取了1710-2690MHz四个有代表性的频点方向图。可以看出，10dB波瓣基本满足120度的波瓣宽度，同时3dB波瓣宽度也在56-71度之间。另外，0度交叉极化大于12dB，±60度交叉极化大于8dB。
如图8所示，为本发明实施例提供的一种抑制谐波的高异频隔离宽带双频双极化基站天线阵列的低频水平方向方向图，选取了690-960MHz四个有代表性的频点方向图。可以看出，10dB波瓣基本满足120度的波瓣宽度，同时3dB波瓣宽度也在64-71度之间。另外，0度交叉极化大于12dB，±60度交叉极化大于8dB。
本实施例具有如下优点：
1)滤波天线单元之间间距小，异频单元间距仅仅为100mm；地板小，地板只有280mm，为当前工业界较高水平；
2)该天线阵列适用于频率690-960MHz频段和1710-2690MHz频段，具有超过40％的杂波抑制性能，高、低频天线单元耦合度都在-30dB以下。
3)该天线单元在小体积的前提下，实现了方向图不畸变的特性，基本满足基站方向图要求。
4)容易加工，安装方便，并且不需要额外的电路加载。
实施例2：
如图9所示，本实施例的高异频隔离宽带双频双极化基站天线阵列，包括一个高频天线单元1、一个低频天线单元2和地板3，即本实施例是两列天线阵列，两个天线单元均置于地板3上，且位于同一水平面，高频天线单元1置于地板3的一边，低频天线单元2置于地板3的中间，本实施例的高频天线单元1和低频天线单元2均为双极化天线单元，具体结构 同实施例1。
实施例3：
本实施例提供了一种高异频隔离宽带双频单极化基站天线阵列，第一高频天线单元1和第二高频天线单元2为单极化天线单元，即振子臂有两个，所述分布式电感为一对微带弯折线电感，两个振子臂构成水平极化振子臂或垂直极化振子臂，两个振子臂之间通过一对微带弯折线电感进行连接；同样地，低频天线单元3为双极化天线单元，即振子臂有两个，两个振子臂构成水平极化振子臂或垂直极化振子臂；所述分布式电容为金属贴片，所述金属贴片设置在两个振子臂的中间，且与两个振子臂相靠近而无接触；第一巴伦和第二巴伦为单极化巴伦，第二巴伦的其中一个面上设有一馈线22和一H型微带线枝节23。其余同实施例1。
实施例4：
本实施例的主要特点是：第一高频天线单元1和第二高频天线单元2为单极化天线单元，低频天线单元3为双极化天线单元；或第一高频天线单元1和第二高频天线单元2为双极化天线单元，低频天线单元3为单极化天线单元。其余同实施例1。
综上所述，本发明适用于无线移动通信基站领域，可应用于各类无线通信系统的接收和发射设备中，由于本发明的滤波特性，特别适用于在开阔复杂的多频段多制式通信场景中，工作在690-960MHz和1710-2690MHz的基站天线；同时受益于滤波特性与辐射特性的集成，本发明也适用于无线移动通信系统设备的一体化和集成化，降低设计要求，提高通信设备抗邻频干扰的能力。
以上所述，仅为本发明专利较佳的实施例，但本发明专利的保护范围并不局限于此，例如天线阵列还可以为四列或以上天线阵列，微带弯折线电感还可以为其他类似的电感，金属贴片还可以为十字形结构、矩形结构、四角星形结构等形状，任何熟悉本技术领域的技术人员在本发明专利所公开的范围内，根据本发明专利的技术方案及其发明构思加以等同替换或改变，都属于本发明专利的保护范围。

Claims (10)

  1. 高异频隔离宽带双频基站天线阵列，其特征在于：包括至少一个高频天线单元、一个低频天线单元和地板；
    所述高频天线单元为一个时，置于地板的一边，高频天线单元为多个时，分别置于地板的两边，高频天线单元包括多个振子臂和巴伦，振子臂之间通过分布式电感进行连接，并通过巴伦进行馈电；
    所述低频天线单元置于地板中间，低频天线单元包括多个振子臂和巴伦，振子臂之间通过分布式电容进行连接，并通过巴伦进行馈电，该巴伦上设有馈线和H型微带线枝节，H型微带线枝节与馈线连接。
  2. 根据权利要求1所述的高异频隔离宽带双频基站天线阵列，其特征在于：所述高频天线单元为单极化天线单元，高频天线单元上的振子臂有两个，所述分布式电感为一对微带弯折线电感，两个振子臂构成水平极化振子臂或垂直极化振子臂，两个振子臂之间通过一对微带弯折线电感进行连接。
  3. 根据权利要求1所述的高异频隔离宽带双频基站天线阵列，其特征在于：所述高频天线单元为双极化天线单元，高频天线单元上的振子臂有四个，所述分布式电感为两对微带弯折线电感，其中两个振子臂构成-45度极化振子臂，-45度极化振子臂通过一对微带弯折线电感进行连接，另外两个振子臂构成+45度极化振子臂，+45度极化振子臂通过另一对微带弯折线电感进行连接；所述两对微带弯折线电感之间交叉连接。
  4. 根据权利要求2或3所述的高异频隔离宽带双频基站天线阵列，其特征在于：所述微带弯折线电感上两两相邻的微带弯折线之间留有间隙，且微带弯折线电感嵌入到振子臂之间。
  5. 根据权利要求1所述的高异频隔离宽带双频基站天线阵列，其特征在于：所述高频天线单元还包括介质板，所述振子臂和分布式电感位于介质板的同一层。
  6. 根据权利要求1所述的高异频隔离宽带双频基站天线阵列，其特征在于：所述低频天线单元为单极化天线单元，低频天线单元上的振子臂 有两个，两个振子臂构成水平极化振子臂或垂直极化振子臂；所述分布式电容为金属贴片，所述金属贴片设置在两个振子臂的中间，且与两个振子臂相靠近而无接触。
  7. 根据权利要求1所述的高异频隔离宽带双频基站天线阵列，其特征在于：所述低频天线单元为双极化天线单元，低频天线单元上的振子臂有四个，其中两个振子臂构成-45度极化振子臂，另外两个振子臂构成+45度极化振子臂；所述分布式电容为金属贴片，所述金属贴片设置在四个振子臂的中间，且与四个振子臂相靠近而无接触。
  8. 根据权利要求6或7所述的高异频隔离宽带双频基站天线阵列，其特征在于：所述金属贴片为圆盘形结构、十字形结构、矩形结构或四角星形结构。
  9. 根据权利要求1所述的高异频隔离宽带双频基站天线阵列，其特征在于：所述低频天线单元还包括介质板，所述振子臂位于介质板的其中一层，所述分布式电容位于介质板的另一层。
  10. 根据权利要求1所述的高异频隔离宽带双频基站天线阵列，其特征在于：所述H型微带线枝节由水平枝节和两个垂直枝节组成，水平枝节与馈线连接，两个垂直枝节连接在水平枝节的两端，并贴合馈线垂直延伸。
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