WO2020181774A1 - 一种宽带双极化天线 - Google Patents

一种宽带双极化天线 Download PDF

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Publication number
WO2020181774A1
WO2020181774A1 PCT/CN2019/113042 CN2019113042W WO2020181774A1 WO 2020181774 A1 WO2020181774 A1 WO 2020181774A1 CN 2019113042 W CN2019113042 W CN 2019113042W WO 2020181774 A1 WO2020181774 A1 WO 2020181774A1
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WO
WIPO (PCT)
Prior art keywords
conductor
polarized antenna
antenna according
broadband dual
dipoles
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Application number
PCT/CN2019/113042
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English (en)
French (fr)
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WO2020181774A8 (zh
Inventor
科莫夫·弗拉季斯拉夫
斯莱德科夫•维克托•亚历山德罗维奇
李梓萌
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广东司南通信科技有限公司
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Publication of WO2020181774A1 publication Critical patent/WO2020181774A1/zh
Publication of WO2020181774A8 publication Critical patent/WO2020181774A8/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
    • H01Q1/12—Supports; Mounting means
    • 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
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/24—Polarising devices; Polarisation filters 
    • 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
    • H01Q19/104—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 using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas
    • 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
    • H01Q19/106—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 using two or more intersecting plane surfaces, e.g. corner reflector 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
    • 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
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength

Definitions

  • This application relates to the field of antennas, in particular to a broadband dual-polarized antenna.
  • the horizontal plane half-power beam width of the dual-polarized antenna is required to be 65 degrees, which not only needs to have a good cross-polarization discrimination rate, but also needs to be well matched with the feeder in a wider frequency band.
  • the US5940044 patent document describes a dual-polarized antenna with a horizontal plane half-power beam width of approximately 65 degrees.
  • the antenna includes multiple dipole auxiliary arrays, each of which is composed of four diamond-shaped dipoles; Two of the dipoles in each auxiliary array are inclined to form a +45 degree angle with the long side of the ground guide plate to form a polarized radiation element array with a +45 degree angle; in addition, two dipoles It forms a –45 degree angle with the long side of the ground guide plate to form a –45 degree polarized radiation element array.
  • the dipoles are arranged in this way so that the phase center of the dipole at an angle of +45 degrees and a component at an angle of -45 degrees can be aligned with a vertical line parallel to the long side of the grounding guide.
  • the phase centers of other dipoles at +45 degrees and the elements at -45 degrees are aligned with another vertical line.
  • the main disadvantage of this dipole square array is its complicated electrical feed network. For example, four cables must be used to feed the dipoles.
  • the patent document US6313809B1 describes a dual-polarization radiator, which contains four dipoles, which are more suitable to be arranged on the reflector, and the top view of the radiator is a square dipole array; Each dipole is fed by a line of symmetry.
  • the line of symmetry has the following characteristics: the radiator assumes an angle of +45 degrees or -45 degrees during polarization, and faces the dipole with a specified structure.
  • Array conducts electrical radiation.
  • CN 108172978 A patent document describes a dual-polarized antenna.
  • the antenna contains four dipoles.
  • the arms of the dipoles are provided with additional conductors. As shown in Figures 1 and 2, the additional conductors are fed by coupling. Feed the adjacent dipole arms electrically and reduce the lower limit frequency of its working frequency band.
  • the dual-polarized antenna in CN 108172978 A patent document has the advantage of miniaturization, but this design also has shortcomings in other aspects.
  • the first disadvantage is that the feeder network requires four cables to realize the connection between the dipole and the beamforming network, and the beamforming network is built on the other side of the reflector, and the connectors of these cables need to be parallel and connected. Another cable on the beamforming network makes the entire feeder network quite complicated. Another disadvantage is that because these feeder cables are directly connected to the dipoles, the working frequency band of the antenna is limited. It can be seen that the There is no matching circuit between the dipole of the antenna and the feeder cable.
  • the purpose of this application is to provide a broadband dual-polarized antenna with an improved structure in view of the problems existing in the dual-polarized antenna in the prior art.
  • This application discloses a broadband dual-polarized antenna, which includes a reflector and a radiation unit arranged on the reflector.
  • the radiation unit includes four dipoles, and the four dipoles are assembled on the reflector; The two arms of each dipole are connected to the top ends of two supporting conductors, and the bottom ends of the two supporting conductors are connected to a common base mounted on the reflector; the two supporting conductors are parallel to each other, and the two supporting The top ends of the conductors are separated from each other by a notch slot.
  • One of the two supporting conductors has a longitudinal slot and a transverse slot. The longitudinal slot is arranged along the length of the support conductor.
  • the longitudinal slot is provided with a separate conductor, and the separate conductor is adjacent to the notch slot.
  • the transverse groove is arranged at the bottom end of the supporting conductor, the transverse groove separates the separated conductor from the common base; the four wires of the four dipoles of the excitation radiation unit are respectively connected to the bottom end of the corresponding separated conductor;
  • the transmission line includes a coaxial cable , At least one of metal strip lines, printed circuit board microstrip lines and waveguides; additional conductors are placed on the dipole arms, and the additional conductors are fixed on the corresponding dipole arms through plastic supports; additional The end of the conductor is bent toward the dipole arm and is separated from the end face of the dipole arm by a dielectric film.
  • the supporting conductor connecting the dipole and the reflecting plate is inclined at an angle of 30-90 degrees with the reflecting plate.
  • concave cutouts and convex bosses on the length edges of the separated conductors, and the cutouts and bosses are in a non-contact state.
  • the notch grooves at the top ends of the two supporting conductors are in a horn-shaped structure, and the opening of the horn faces the dipole arm.
  • the two arms of each dipole jointly use a group of additional conductors, and each group of additional conductors is fixed by a plastic support.
  • the plastic support has a protruding boss at the notch groove, and the boss is placed in the notch groove to fill the notch groove.
  • the plastic support is provided with a protruding boss, and the boss is placed in a longitudinal groove adjacent to the notch groove to fill the longitudinal groove.
  • the outer edge of the dipole arm has a conductor protrusion that extends downward to point to the reflector; the conductor protrusion is located outside the space enclosed by the four dipoles.
  • the inner edge of the dipole arm has a conductor protrusion that extends downward to point to the reflector; the conductor protrusion is located inside the space enclosed by the four dipoles.
  • the dipole arm is bent toward the center of the radiation unit, so that the overall outer contour of the top of the radiation unit composed of four dipoles is circular, rectangular or polygonal.
  • an L-shaped conductor is provided on the plastic support plate between the ends of the two arms of the dipole.
  • an L-shaped conductor is provided on the plastic support plate between adjacent dipoles.
  • the transmission lines of the four dipoles of the excitation radiation unit are all coaxial cables, the bottom end of the separated conductor is directly connected to the inner conductor of the coaxial cable, and the outer conductor of the coaxial cable is connected to the common base.
  • the transmission lines for the four dipoles of the excitation radiation unit are printed circuit boards, and the four ends of the bottom ends of the separated conductors are connected to the strip lines of the feed network constructed on the printed circuit board.
  • the two ports of the feed network constructed on the printed circuit board are connected with two coaxial cables or metal strip lines as input ports.
  • the printed circuit board is placed on the common base.
  • the printed circuit board is placed on the reflector.
  • the printed circuit board feed network is provided with a matching circuit including short-circuit and open-circuit branches.
  • the feeder network includes cross-arranged strip lines separated from each other by avoiding gaps, and conductive bridges adjacent to the avoiding gaps and connecting the two ends of the strip lines.
  • the additional conductor is placed above the dipole arm.
  • the additional conductor is placed under the dipole arm.
  • the additional conductor is integrally formed with the dipole arm, and the additional conductor is bent downward along the outer edge of the dipole arm, pointing in the direction of the reflector, and placed below the plane of the dipole arm.
  • the additional conductor is integrally formed with the dipole arm, and the additional conductor is bent upward along the outer edge of the dipole arm, away from the direction of the reflector, and placed on a plane higher than the dipole arm.
  • the additional conductor is bent along the outer edge of the same plane of the dipole arm, and the end of the additional conductor is directly connected to the dipole arm, or the additional conductor is directly welded to the dipole.
  • the broadband dual-polarized antenna of the present application further includes a focusing element, and the focusing element is placed above the radiation unit.
  • the four dipoles, the supporting conductor connecting the dipoles, and the common base are an integrated structure made of conductive materials.
  • the four dipoles, the supporting conductors connecting the dipoles, and the common base are made into an integrated structure through die casting, stamping or 3D printing processes.
  • the four dipoles, the supporting conductor connecting the dipoles, the common base and the additional conductor are an integral structure made of conductive materials.
  • the four dipoles, the supporting conductors connecting the dipoles, the common base and the additional conductors are made into an integrated structure through die-casting, stamping or 3D printing processes.
  • the broadband dual-polarized antenna of the present application further includes a high-frequency antenna, which is arranged in a cavity surrounded by four dipoles to form a coaxial multi-frequency antenna.
  • At least two radiating elements are placed on the reflector to form a dual-polarized array antenna.
  • At least one of the at least two radiating elements has an asymmetric structure to compensate for the coupling between adjacent antennas, and at the same time obtain the desired dual-frequency dual-polarized antenna Radiation characteristics.
  • At least two sides of the reflector of the broadband dual-polarized antenna of the present application are provided with side walls.
  • the side walls on the two sides extend downward in a direction away from the radiation unit.
  • At least one additional side wall extending upward is provided on the side adjacent to the radiation unit; that is, at least one additional side wall extending upward is provided on the side of the radiation unit.
  • the additional side wall is different from the side wall on the side of the reflector, and it is set inside the reflector; the function of the additional side wall is to change the overall cross polarization and beam width of the array antenna; The number, specific height and length can be adjusted by the required cross-polarization and beam width, which are not specifically limited here.
  • At least one upwardly extending L-shaped isolated conductor is provided on the side surface adjacent to the radiation unit, that is, at least one upwardly extending L-shaped isolated conductor is provided on the side of the radiation unit.
  • the shape of the L-shaped isolated conductor is similar to that of the additional side wall, except that the additional side wall is longer, while the L-shaped isolated conductor is shorter; and the main function of the L-shaped isolated conductor is to improve the isolation, which is effective for a single radiation unit. Or partial cross-polarization adjustment.
  • the broadband dual-polarized antenna of the present application can achieve a half-power beam width of 60-65 degrees through structural improvements, the relative working bandwidth is at least 46%, and it has a good plus or minus 60 degree coverage of sector edge cross poles
  • the broadband dual-polarized antenna of the present application has better matching in a wide frequency range and can be compatible with a broadband antenna array.
  • Figure 1 is a schematic diagram of the structure of a dual-polarized antenna in the prior art CN108172978 A patent;
  • Fig. 2 is a schematic diagram of the structure of the dual-polarized antenna in the prior art CN108172978 A patent from another perspective;
  • FIG. 3 is a schematic structural diagram of a dual-polarized antenna in Embodiment 1 of the present application.
  • FIG. 4 is a schematic structural diagram of a dual-polarized antenna in Embodiment 2 of the present application.
  • FIG. 5 is a schematic structural diagram of a dual-polarized antenna in Embodiment 3 of the present application.
  • FIG. 6 is a schematic structural diagram of a dual-polarized antenna in Embodiment 4 of the present application.
  • FIG. 7 is a schematic structural diagram of a dual-polarized antenna in Embodiment 5 of the present application.
  • FIG. 8 is a schematic structural diagram of a dual-polarized antenna in Embodiment 6 of the present application.
  • FIG. 9 is a schematic structural diagram of a dual-polarized antenna in Embodiment 7 of the present application.
  • FIG. 10 is a schematic structural diagram of a dual-polarized array antenna in Embodiment 8 of the present application.
  • the dual-polarized antenna described in this patent document contains four dipoles 12, and four dipoles. 12 are arranged in sequence and form a radiating surface, a dipole 12 is a vibrator, two dipoles are a pair, and the two pairs of dipoles are arranged symmetrically opposite each other and arranged in the form of orthogonal polarization; the arms of the four dipoles Connected to the top of the corresponding feeding balun 16, each dipole 12 is connected with a pair of feeding baluns 16 to feed and support the dipole 12; the feeding baluns 16 are radially axisymmetric Connected to the base 14; each dipole is provided with a loading element 18, the loading element 18 is placed along the dipole arm, and is fixed on the dipole arm by a dielectric element, the four dipoles 12 correspond to four Two loading units 18 and four loading units 18 are arranged axisymmetrically; the middle of
  • the medium unit 19 is arranged between the loading unit 18 and the dipole 12, and each loading unit 18 and each medium unit 19 are fixedly connected to each dipole 12
  • the upper and the dipoles 12 form a microstrip-like structure.
  • the four dipoles 12 are respectively a first dipole 12a, a second dipole 12b, a third dipole 12c, and a fourth dipole 12d.
  • the first dipole 12a includes two first unit arms 122a.
  • the second dipole 12b includes two second unit arms 122b
  • the third dipole 12c includes two third unit arms 122c
  • the fourth dipole 12d includes two fourth unit arms 122d.
  • Adjacent first unit arm 122a and second unit arm 122b, adjacent second unit arm 122b and third unit arm 122c, adjacent third unit arm 122c and fourth unit arm 122d, and adjacent fourth unit arm The unit arm 122d and the first unit arm 122a respectively share a loading unit 18 and a media unit 19 respectively.
  • the coupling length of the loading element 18 and the dipole arm is approximately twice the length of a single dipole arm, so this design containing the loading element 18 greatly reduces the size and height of the radiating element, but cannot improve the cross-polarization ratio .
  • this application creatively proposes a broadband dual-polarized antenna with an improved structure, as shown in Fig. 3, comprising a reflector and a radiation unit arranged on the reflector.
  • the radiation unit includes four dipoles, The four dipoles are arranged in a square structure and installed on the reflector; the two arms of each dipole are connected to the top ends of the two supporting conductors, and the bottom ends of the two supporting conductors are connected to one and installed on the reflector.
  • One of the two supporting conductors has a longitudinal groove and a transverse groove, and the longitudinal groove is along the length of the supporting conductor
  • the longitudinal slots are provided with separate conductors, the separate conductors are adjacent to the notch slots, and the transverse slots are arranged at the bottom end of the supporting conductors.
  • the transverse slots separate the separate conductors from the common base; the four dipoles each have four excitations
  • the transmission line of the radiating unit, the four transmission lines are respectively connected to the bottom end of the corresponding separate conductor; additional conductors are placed on the dipole arms, and the additional conductors are fixed on the corresponding dipole arms by plastic supports; the ends of the additional conductors Bend toward the dipole arm and isolate it from the end face of the dipole arm by a dielectric film.
  • the four transmission lines of the excitation radiation unit are connected to the four bottom ends of the separated conductor components; the bottom ends of the separated conductors are directly connected to the inner conductor of the coaxial cable, or with the printed circuit placed on the common base or on the reflector. Strip line connection of the feed network built on the board.
  • the broadband dual-polarized antenna of the present application has an increased cross-polarization ratio at the edge of the coverage sector at +/-60 degrees.
  • the antenna includes additional conductors and guide slots, and the additional conductors extend along The dipole arm is placed, and the guide slot is set in the supporting conductor; the shape, structure and size of the additional conductor and the longitudinal slot will affect the radiation characteristics of the antenna; therefore, it can be improved by adjusting the size of the dipole arm or the additional conductor or the guide slot The cross-polarization ratio of the antenna over a wide frequency band.
  • the dual-polarized antenna of the present application has the characteristics of a wider frequency band.
  • the separate conductors on the supporting conductor are separated by longitudinal slots, and form a transmission line connected between the dipole arm and the feeder; therefore, In actual application, the size of the support conductor and the cutout and boss of the longitudinal slot can be adjusted to improve the matching degree between the dipole and the feeder in a wide frequency range.
  • the dual-polarized antenna of the present application is easier to connect to the beam forming network.
  • the four coaxial cables that excite the radiating unit are connected to the bottom ends of the four separate conductors, and the supporting conductors are located near the common base and placed on the reflector. On the board; it can be seen that the length of the coaxial cable used to connect the beamforming network of the dual-polarized antenna of the present application is greatly reduced.
  • the bottom end of the separated conductor is directly connected to the strip line, and the strip line is arranged on the common base or the feeder network constructed by the printed circuit board on the reflector.
  • the dual-polarized antenna of the present application is easier to connect to the beamforming network.
  • the low-frequency radiator of the dual-polarized antenna of the present application is better compatible with the dual-band array antenna, the height of the radiation unit of the present application is reduced, and the beam distortion generated by the high-frequency radiation unit inside the low-frequency radiation unit is also reduced.
  • the antenna design of the present application can improve the cross-polarization ratio and isolation of the array antenna in a wide frequency band by adjusting the size of the additional conductor and the longitudinal slot, and compensate the coupling between adjacent radiators.
  • the broadband dual-polarized antenna of this example includes a reflector and a radiating element mounted on the reflector, as shown in Figure 3.
  • Figures A and B in the figure are the enlarged schematic diagrams of the A and B parts respectively; the radiating element Contains four dipoles, namely the first dipole 1a, the second dipole 1b, the third dipole 1c and the fourth dipole 1d.
  • the four dipoles are arranged in a square structure and placed in On the reflector 2; the first dipole 1a has two dipole arms 21a and 22a, the second dipole 1b has two dipole arms 21b and 22b, and the third dipole 1c has two dipoles The sub-arms 21c and 22c, the fourth dipole 1d has two dipole arms 21d and 22d; the two dipole arms 21a and 22a of the first dipole 1a are respectively connected to the top ends of the conductor elements 23a and 24a, The two dipole arms 21b and 22b of the second dipole 1b are respectively connected to the top ends of the conductor elements 23a and 24a, and the two dipole arms 21c and 22c of the third dipole 1c are respectively connected to the conductor elements 23c and The top of 24c, the two dipole arms 21d and 22d of the fourth dipole 1d are connected to the tops of conductor elements 23d and 24d, respectively; all conductor elements 23a to 23d, 24a to 24d are inclined away
  • the conductor element 23a has a longitudinal groove 5a
  • the conductor element 23b has a longitudinal groove 5b
  • the conductor element 23c has a longitudinal groove 5c
  • the conductor element 23d has a longitudinal groove 5d
  • the longitudinal groove 5a is provided with a separated conductor 6a adjacent to the notched groove 4a
  • the longitudinal groove 5b is provided with a separated conductor 6b adjacent to the notched groove 4b
  • the longitudinal groove 5c is provided with a notched groove 4c.
  • the adjacent separated conductor 6c and the longitudinal groove 5d are provided with separated conductors 6d adjacent to the notched groove 4d; the transverse groove is provided at the bottom end of the conductor element, and the transverse groove separates the separated conductor from the common base, for example, the transverse groove 7a to 7d separates the separate conductors 6a to 6d from the common base 3; at the same time, the transverse grooves at the bottom ends of the separate conductors 6a to 6d also separate them from the conductor elements 23a to 23d, and connect the conductor elements 23a to 23d to the common base 3.
  • the other conductor of the two conductor elements that separate the conductor 6a and a dipole The element 24a is separated by the notch 4a and forms a transmission line, which is connected to the dipole arms 21a and 22a one by one; the remaining three separate conductors 6b to 6d also form a transmission line with another conductor element 24b to 24d, and one by one Correspondingly connected to the dipole arms 21b to 21d and 22b to 22d; the inner conductors of the four coaxial cables that excite the radiation unit are connected to the bottom ends of the separate conductor parts 6a to 6d, and the outer conductors of the coaxial cables are connected On the common base 3, as shown in Figure 3B, for example, the inner conductor of the coaxial cable 8a is connected to the bottom end of the separate conductor 6a, the outer conductor is connected to the common base 3, and the inner conductor of the coaxial cable 8b is connected to The bottom end of the separated conductor 6b and the outer conductor are connected to the
  • Additional conductors 9a, 9b, 9c, and 9d are placed on the dipole arms of each dipole, for example, additional conductors 9a are placed on the two dipole arms 21a and 22a of the first dipole 1a, and so on;
  • the additional conductor is fixed on the dipole arm through the plastic support 20; taking the additional conductor of the first dipole 1a as an example, the middle part of the additional conductor 9a is opposite to the notch slot 4a along the arms 21a and 22a of the dipole 1a.
  • the end of the additional conductor element 9a is bent toward the dipole arm, and is separated from the end face of the dipole arm by the dielectric film 26, as shown in Figure 3 A; the end of the additional conductor 9a is connected to the dipole arm There is a strong capacitive coupling between the ends of the arms 21a and 22a of 1a, and the input impedance of the dipole 1a depends on the degree of coupling between the additional conductor 9a and the dipole arms 21a and 22a.
  • the impedance of the dipole 1a in a wide frequency range can be changed by adjusting the size of the additional conductor element 9a and the thickness of the dielectric film 26; the other three additional conductors 9b, 9c, and 9d are set up with the first dipole.
  • the additional conductor 9a on the sub is similar and will not be described here.
  • the separated conductor part 6a of the first conductor element 23a of each dipole and the second conductor element 24a are separated by the notch 4a and form a transmission line, which is connected to the dipole Between the two dipole arms 21a and 22a and the feeder; in actual use, you can try to obtain the required matching circuit by adjusting the size of the notch 4a, the conductor elements 23a and 24a, and improve the dipole 1a and Matching between coaxial cables 8a.
  • the coaxial cables are connected to the bottom ends of the separate conductors beside the common base 3 one by one. Compared with the known antennas connected to the coaxial cables beside the top of the conductors, the length of the coaxial cables used in this example is shorter.
  • this new type of conductor elements 23a to 23d and additional conductors 9a to 9d provides more possibilities for improving the matching between the radiation unit and the feeder of the preferred dual-polarized antenna, and also for simplifying radiation
  • the connection between the unit and the beamforming network provides more realizability.
  • the broadband dual-polarized antenna of this example is similar to the first embodiment, except that, as shown in Fig. 4, the dipole arms of the four dipoles make the radiation surface of the radiating element a circular structure; additional conductors It has an arc structure and is installed above the dipole arm; the plastic support 20 is a ring structure; compared with the radiating unit with an octagonal outline structure in the first embodiment, the radiating unit designed in this example can be more High gain.
  • the conductor element 24a and the separated conductor 6a include cutouts 25a and bosses 27a. These cutouts and bosses can change the resistance of the transmission line composed of the conductor element 24a and the separated conductor 6a; In practice, the size of the cutout 25a and the boss 27a, and their position on the conductor can be adjusted to achieve a good match between the preferred radiation unit and the beamforming network.
  • the situation of the other dipoles is similar.
  • the separated conductor 6b of the second dipole includes the cutout 25b and the boss 27b, and its function and effect are the same as the first dipole.
  • its conductor element 24a also includes longitudinal grooves 28a.
  • the longitudinal grooves 28a correspond to the separated conductors 6a one by one and are arranged in opposite directions; these longitudinal grooves are connected to the transmission line composed of the conductor elements 24a and the separated conductors 6a.
  • the series connection generates inductance and suppresses the frequency, and the generated electrical length is a quarter wavelength; the longitudinal slot in this design constitutes an additional part of the matching circuit and the filter, which can eliminate unwanted high frequencies in the input signal.
  • the conductor element of the second dipole also includes a longitudinal slot 28b.
  • the common base 3 is placed on the surface of the reflector 2 and connected to the bottom ends of the four separate conductors 6a to 6d.
  • the four separate conductors 6a to 6d are respectively connected to the strip lines 29a to 29d, and the strip lines 29a to 29d is placed on the upper surface of the dielectric substrate 30, and the dielectric substrate 30 is placed on the reflector 2; a set of strip lines 29a and 29c are respectively connected to the first dipole 1a and the third dipole 1c to obtain the first One polarization is connected to the first end of the strip line 31a; the other set of strip lines 29b and 29d are connected to the second dipole 1b and the fourth dipole 1d, respectively, to obtain the second polarization, and Connected to the first end of the other strip line 31b; the second ends of the two strip lines 31a and 31b connected to the polarized dipole are connected to the inner conductors 32a and 32b of the two coaxial cables, respectively.
  • the outer conductor of the cable is soldered on the conductive film, which covers the lower surface of the dielectric substrate 30; the open branches 33a and 34a are connected to the strip line 31a connecting the first polarization, and the other open branches 33b and 34b are Connected to the strip line 31b connected to the second polarization, together to form a matching circuit, which can effectively suppress frequency interference.
  • the dual-polarized antenna of this example is well matched with the coaxial cable, and can be directly connected to a printed circuit board with a power divider, a filter and other matching circuit components; the dielectric substrate 30 is placed on the reflector 2, because the reflector The size of 2 is larger, so there is more room to increase the size of the dielectric substrate, and to increase other components of the beamforming network, such as the duplexer.
  • the broadband dual-polarized antenna of this example is similar to the first embodiment, except that, as shown in Figure 5, additional conductors 9a to 9d are placed above the corresponding dipole arms; the dipole arms of the four dipoles Together they form the outer contour of the radiating unit, which is octagonal; the bottom of the conductor element inclines to the reflector 2 to form a 90 degree angle; the top of the conductor element is parallel to the reflector 2; this shape structure can have more space Place the dielectric substrate 35 on the common base 3; the size of the notch slot between the conductor elements, as the notch slot is closer to the dipole arm, the larger the size of the notch, the end of the notch is horn-shaped; the longitudinal slot only The part that is perpendicular to the reflector plate 2 is opened on one of the two conductor elements of the dipole; the arrangement of the conductor element and the notch slot can make the antenna obtain a half-power beam width of 60 degrees, and improve the radiation unit and the feeder Match.
  • the bottom ends of the four separate conductors are directly connected to the first ends of the corresponding four strip lines, for example, the bottom ends of the separate conductors 6a of the first dipole are connected to the first ends and second ends of the corresponding strip lines.
  • the bottom end of the separate conductor 6b of the pole is connected to the first end of its corresponding strip line 36b
  • the bottom end of the separate conductor 6c of the third dipole is connected to the first end of its corresponding strip line 36c
  • the fourth dipole The bottom end of the separated conductor 6d is connected to the first end of its corresponding strip line 36d
  • the four strip lines are placed on the upper surface of the dielectric substrate 35 on the common base 3 and connected to the dipole
  • the feeder cable 37 is composed of a first feeder cable 37a and a second feeder cable 37b.
  • the inner conductors of the two feeder cables have the same polarization; the outer conductor of the feeder cable Solder to the common base 3 or the conductive film covering the lower surface of the dielectric substrate 35; the four strip lines can also constitute a matching circuit, and other components such as conductive bridges 38 placed on the crossed strip lines.
  • the broadband dual-polarized antenna of this example is similar to the first embodiment, except that, as shown in Fig. 6, the dipole arms of the four dipoles make the outer contour of the radiation surface of the radiating unit an octagonal structure; each The ends of the two arms of the dipole have a downwardly extending conductor protrusion 39 pointing to the reflector plate 2.
  • the conductor protrusion is located outside the space enclosed by the four dipoles; these conductor protrusions can increase the dipole The electrical length of the sub-arm, thereby shortening the length of the dipole arm, reduces the size of the radiation unit.
  • the four additional conductors 9a to 9d are bent along the outer edge of the radiating unit and placed higher than the plane where the dipoles are located; the plastic support plate 40 is used to fix the conductor elements used to support the four dipoles.
  • the electrical length of the transmission line composed of conductor elements reduces the radiation interference between these transmission lines; the electrical length generated by the conductor supported by the plastic support plate 40 to the transmission line is the same as the electrical length generated by the conductor without the plastic support plate. The length is equivalent, so the radiating unit can be placed closer to the reflector 2, which can reduce the antenna volume.
  • the broadband dual-polarized antenna of this example is similar to the fourth embodiment, except that, as shown in FIG. 7, the ends of the two arms of each dipole have a downwardly extending conductor protrusion 41 that points to the reflector 2 ,
  • the conductor protrusion is located inside the space enclosed by the four dipoles; similarly, this conductor protrusion design can increase the electrical length of the dipole arm, so the length of the dipole arm can be reduced to achieve radiation The purpose of unit miniaturization.
  • the four additional conductor elements are bent along the outer edge of the radiating unit and placed below the plane of the dipole arm.
  • This design can reduce the height of the radiating unit in this embodiment; the plastic support plate 42 includes a longitudinal slot 43 And 44, used to fix the two conductor elements of a dipole, one of the longitudinal grooves is connected with the notch groove.
  • the plastic supporting plate 42 with longitudinal grooves 43 and 44 in this example can more effectively increase the electrical length of the transmission line composed of conductor elements.
  • the four L-shaped conductive elements are placed upside down on the plastic support plate 20 and correspond to the notches. This structural arrangement can improve the antenna The cross-polarization ratio and the matching degree of the radiating element and the feeder.
  • the broadband dual-polarized antenna of this example is similar to the fifth embodiment, except that, as shown in Fig. 8, four additional conductor elements 9a to 9d are placed under the corresponding dipole arms, which can reduce the height of the radiating element.
  • four L-shaped conductors 46a, 46b, 46c, and 46d are respectively placed on the plastic support plate 20 between the ends of the adjacent dipole arms, which can improve the cross polarization ratio.
  • the broadband dual-polarized antenna of this example also adds a high-frequency antenna 47, which is placed at the center of the radiating unit on the reflector 2 to form a coaxial multi-band antenna.
  • the broadband dual-polarized antenna of this example is similar to the first embodiment, except that, as shown in FIG. 9, four additional conductors 9a to 9d are bent along the outer edge of the dipole arm and placed on the corresponding dipole.
  • the plane of the sub-arm; the end of the additional conductor is directly connected to the end of the dipole arm.
  • the antenna array of this example includes six broadband dual-polarized antennas 48 and an independent high-frequency antenna 49.
  • the broadband dual-polarized antenna 48 is shown in the figure.
  • the antenna shown in 8 is a coaxial multi-band antenna formed by setting a high-frequency antenna 47 in the low-frequency antenna; each independent high-frequency antenna 49 is placed between the broadband dual-polarized antennas 48 on the long side of the reflector 50,
  • the two sides of the reflector 50 have longitudinal side walls, namely side walls 51; the L-shaped isolated conductor 52 is placed on the reflector 50, is arranged on both sides of the radiating unit, and has at least one broadband dual-polarized antenna 48 facing away from it.
  • the additional side wall 53 is placed on the reflector 50, and there is at least one broadband dual-polarized antenna 48 facing away.
  • the additional side walls are arranged on both sides of the radiating element at both ends, and the L-shaped isolation conductors are arranged on both sides of the radiating element in the middle.
  • the broadband dual-polarized antenna of this example can adopt any of the first to seventh embodiments, and the voltage standing wave ratio, cross-polarization ratio, and cross-polarization ratio required by the dual-frequency dual-polarized antenna can be obtained in a wider frequency band. Isolation between ports and other antenna characteristics.
  • dipole arms dipole support conductors, separate conductors, longitudinal slots, notched slots, notches, bosses, additional conductors, L-shaped conductors, etc.
  • These structures can be flexibly set to symmetrical or asymmetrical structures according to actual needs. It is used to compensate the coupling between adjacent antennas and obtain the desired radiation characteristics of the dual-frequency dual-polarized antenna.
  • the sample of the dual-polarized array antenna of this example was tested in a microwave darkroom.
  • the test results showed that the dual-polarized array antenna of this example has a half-power beam width of 60-65 degrees, and the relative working bandwidth is at least 46%, +/- The cross-polarization ratio of the 60-degree coverage sector edge is not less than -10dB.
  • the dual-polarized antenna of this example has good matching in a wide frequency band, is easy to connect to the beamforming network, and can meet most practical application requirements.

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  • Aerials With Secondary Devices (AREA)
  • Waveguide Aerials (AREA)

Abstract

本申请公开了一种宽带双极化天线。本申请的宽带双极化天线，辐射单元包含四个偶极子，四个偶极子组合后安装在反射板上；偶极子两个臂连分别接于两个支撑导体顶端，支撑导体底端连接公共底座；两个支撑导体顶端由缺口槽隔开，其中一个导体具有纵向槽和横向槽，纵向槽设有分离导体，分离导体与缺口槽相邻，横向槽将分离导体与公共底座隔开；四个偶极子的四条导线分别连接相应分离导体的底部末端；偶极子臂上放有附加导体；附加导体末端向偶极子臂弯折，并由电介质薄膜将其隔离。本申请的天线，可实现60-65度半功率波束宽度，工作相对带宽至少为46％，具有较好正负60度覆盖扇区边沿交叉极化比；在宽频带范围内具有较好匹配性和兼容性。

Description

一种宽带双极化天线 技术领域
本申请涉及天线领域，特别是涉及一种宽带双极化天线。
背景技术
在当今这个频繁使用移动电话的时代，市场每年对宽频带双极化天线的需求也随之变得巨大，因此业内投入了相当大的人力和物力研发制造简易的宽频带双极化天线以满足市场的需求。在实际运用中，大多数情况都要求双极化天线的水平面半功率波束宽度为65度，不仅需要具有良好的交叉极化鉴别率，还需要在较宽频带范围内与馈线良好匹配。
由于交叉偶极子的水平面波束宽度过宽，为了满足减小波束宽度的需求，就要使用结构较为复杂的辐射体。US5940044专利文献中描述了一种水平面半功率波束宽度大约为65度的双极化天线，该天线包含了多个偶极子附属阵列，每个附属阵列由四个钻石状的偶极子组成；每个附属阵列中的其中两个偶极子都是倾斜的，与接地导板的长边组成+45度角，以形成一个+45度角的极化辐射单元阵列；另外，两个偶极子与接地导板的长边组成–45度角，以形成一个–45度角的极化辐射单元阵列。这样排列偶极子是为了使呈+45度角的偶极子的相位中心和一个呈-45度角的元件能与跟接地导板长边平行的一条垂直线对齐。其他呈+45度角的偶极子的相位中心和呈-45度角的元件与另外一条垂直线对齐。这种偶极子方阵的主要缺点在于其复杂的电馈网络。例如，必须使用四条电缆对偶极子进行电馈。
在EP0973231A2、US6333720B1、US6529172B2和US2010/0309084A1专利文献中分别展示了其它几种具有方阵型偶极子的辐射体的数据；其技术方案是，这些偶极子的不平衡变压器都向偶极子方阵的中心部位倾斜，以简化生产步骤，但尽管如此，这些装置仍然较为复杂。
US6313809B1专利文献中描述了一种双极化辐射体，该辐射体包含了四个偶极子，这些偶极子更适宜被排列于反射体上，其顶视图为一个偶极子方阵；每个偶极子都是依靠一条对称线来进行电馈的，该对称线具有以下特点：辐射体在极化作用中呈+45度角或-45度角，向已规定结构的偶极子方阵进行电辐射。另外在US6940465B2、US7688271B2、 CN202423543U、CN202268481U、CN101916910A、CN102097677A、CN102694237A、CN102544711A、CN201199545Y、CN102117967A和CN102013560A等专利文献中都分别有描述类似结构的偶极子方阵。
随着通信行业的发展，如今无线通信系统中使用的天线都具有若干不同的频段，并包含多个彼此相邻的辐射体，这样就导致了天线的尺寸比较大的问题；有鉴于此，需要提供一种优化的双极化辐射体，能够兼容多频段的宽频带天线的同时，满足体积小型化的要求。
CN 108172978 A专利文献中描述了一种双极化天线，该天线包含了四个偶极子，偶极子的臂上设有附加导体，如图1和图2所示，附加导体通过耦合馈电的方式向相邻的偶极子臂进行馈电，并降低其工作频带的下限频率。由此可见，CN 108172978 A专利文献中的双极化天线具有尺寸小型化的优点，但这种设计在其它方面也存在不足。第一个不足是，其馈电网络需要四条电缆来实现偶极子与波束形成网络之间的连接，而波束形成网络构建在反射板的另一面，而且，这些电缆的接头还需要平行且连接于波束形成网络上的另一条电缆，这就使得整个馈电网络相当复杂；另外一个不足是，由于这些馈电电缆直接连接于偶极子，天线的工作频带受到了限制，由此可见，该天线的偶极子与馈电电缆之间不具有匹配电路。
发明内容
本申请的目的是针对现有技术的双极化天线存在的问题，提供一种结构改进的宽带双极化天线。
为了实现上述目的，本申请采用了以下技术方案：
本申请公开了一种宽带双极化天线，包括反射板和布置在反射板上的辐射单元，其中，辐射单元包含了四个偶极子，四个偶极子组合后安装在反射板上；每个偶极子的两个臂连分别接于两个支撑导体的顶端，两个支撑导体的底端连接于一个安装于反射板的公共底座上；两个支撑导体相互平行，并且两个支撑导体的顶端由缺口槽将其彼此隔开，两个支撑导体中一个导体具有纵向槽和横向槽，纵向槽沿支撑导体的长度方向设置，纵向槽设置有分离导体，分离导体与缺口槽相邻，横向槽设置于支撑导体底端，横向槽将分离导体与公共底座分隔开；激励辐射单元的四个偶极子的四条导线分别连接到相应的分离导体的底部末端；传输线包括同轴电缆、金属带状线、印制电路板微带线和波导管的至少一种；偶极子臂上放置有附加 导体，附加导体通过塑料支撑件将其固定在相应的偶极子臂上；附加导体的末端向偶极子臂弯折，并通过电介质薄膜将其与偶极子臂的端面隔离开。
优选的，连接偶极子和反射板的支撑导体与反射板成30-90度倾斜角。
优选的，分离导体的长度边沿上有凹的切口和凸出的凸台，切口和凸台呈不接触的齿合状态。
优选的，两个支撑导体顶端的缺口槽呈喇叭形结构，喇叭的敞口朝向偶极子臂。
优选的，每个偶极子的两个臂共同采用一组附加导体，每组附加导体由塑料支撑件固定。
优选的，塑料支撑件在缺口槽处具有凸出的凸台，凸台置于缺口槽中，填充缺口槽。
优选的，塑料支撑件设置有凸出的凸台，凸台置于与缺口槽相邻的纵向槽中，填充纵向槽。
优选的，偶极子臂的外边沿具有向下延伸指向反射板的导体凸出部；导体凸出部位于四个偶极子合围的空间外侧。
优选的，偶极子臂的内边沿具有向下延伸指向反射板的导体凸出部；导体凸出部位于四个偶极子合围的空间内侧。
优选的，偶极子臂向辐射单元的中心部位弯曲，使得四个偶极子组成的辐射单元的顶部整体外轮廓呈圆形、矩形或多边形。
优选的，在偶极子的两个臂的末端之间的塑料支撑板上设置有L型导体。
优选的，在相邻的偶极子之间的塑料支撑板上设置有L型导体。
优选的，激励辐射单元的四个偶极子的传输线均为同轴电缆，分离导体的底端直接连接于同轴电缆的内导体，同轴电缆的外导体连接于公共底座上。
优选的，激励辐射单元的四个偶极子的传输线为印制电路板，分离导体的底端的四个末端与在印制电路板上构建的馈电网络的带状线连接。
优选的，印制电路板上构建的馈电网络的两个端口与两根同轴电缆或者金属带状线连接，作为输入端口。
优选的，印制电路板放置于公共基座上。
优选的，印制电路板放置于反射板上。
优选的，印制电路板馈电网络设置有包括短路和开路枝节的匹配电路。
优选的，馈电网络包括由避开间隙相互隔离开的交叉布置的带状线，以及与避开间隙相邻且连接带状线两末端的导电电桥。
优选的，附加导体放置在偶极子臂的上方。
优选的，附加导体放置在偶极子臂的下方。
优选的，附加导体与偶极子臂一体成型，附加导体沿着偶极子臂的外边沿向下弯折，指向反射板方向，放置在低于偶极子臂所在平面。
优选的，附加导体与偶极子臂一体成型，附加导体沿着偶极子臂的外边沿向上弯折，背离反射板方向，放置在高于偶极子臂所在平面。
优选的，附加导体沿着偶极子臂同一平面的外边沿弯折，且附加导体末端直接连接于偶极子臂，或者附加导体直接焊接在偶极子上。
优选的，本申请的宽带双极化天线还包括聚焦元件，聚焦元件放置在辐射单元上方。
优选的，本申请的宽带双极化天线中，四个偶极子、连接偶极子的支撑导体和公共底座为导电材料制备的一体成型结构。
优选的，四个偶极子、连接偶极子的支撑导体和公共底座通过压铸、冲压或3D打印工艺制成一体式结构。
优选的，本申请的宽带双极化天线中，四个偶极子、连接偶极子的支撑导体、公共底座和附加导体为导电材料制备的一体成型结构。
优选的，四个偶极子、连接偶极子的支撑导体、公共底座和附加导体通过压铸、冲压或3D打印工艺制成一体式结构。
优选的，本申请的宽带双极化天线还包括高频带天线，高频带天线设置于四个偶极子围成的空腔内，构成共轴的多频段天线。
优选的，本申请有至少两个辐射单元放置于反射板上构成双极化阵列天线。
优选的，本申请的双极化阵列天线中，至少两个辐射单元中，至少一个为非对称结构，用于补偿相邻的天线之间的耦合，同时获得双频双极化天线所期望的辐射特性。
优选的，本申请的宽带双极化天线的反射板的至少两个侧边上设有侧壁。本申请的一种实现方式中，两个侧边上的侧壁背离辐射单元的方向向下延伸。
优选的，反射板内部，在与辐射单元相邻的侧面位置上至少设置有一个向上延伸的附加侧壁；即于辐射单元侧面设置有至少有一个向上延伸的附加侧壁。
需要说明的是，附加侧壁与反射板侧边上的侧壁不同，是设置于反射板内部的；附加侧壁的作用是改变阵列天线整体的交叉极化和波束宽度；附加侧壁的具体个数、具体高度和长度可以所需交叉极化和波束宽度进行调整，在此不作具体限定。
优选的，反射板内部，在与辐射单元相邻的侧边面置上至少设置有一个向上延伸的L型隔离导体，即于辐射单元侧面设置有至少有一个向上延伸的L型隔离导体。
需要说明的是，L型隔离导体与附加侧壁的形状类似，只是附加侧壁较长，而L型隔离导体较短；并且，L型隔离导体的主要作用是提高隔离度，对单个辐射单元或局部进行交叉极化调整。
由于采用以上技术方案，本申请的有益效果在于：
本申请的宽带双极化天线，通过结构改进，可以实现60-65度的半功率波束宽度，工作的相对带宽至少为46％，并且，具有较好的正负60度覆盖扇区边沿交叉极化比；本申请的宽带双极化天线在宽频带范围内具有较好的匹配性，能够兼容宽频带天线阵列。
附图说明
图1是现有技术CN108172978 A专利中的双极化天线的结构示意图；
图2是现有技术CN108172978 A专利中的双极化天线另一视角的结构示意图；
图3是本申请实施例一中双极化天线的结构示意图；
图4是本申请实施例二中双极化天线的结构示意图；
图5是本申请实施例三中双极化天线的结构示意图；
图6是本申请实施例四中双极化天线的结构示意图；
图7是本申请实施例五中双极化天线的结构示意图；
图8是本申请实施例六中双极化天线的结构示意图；
图9是本申请实施例七中双极化天线的结构示意图；
图10是本申请实施例八中双极化阵列天线的结构示意图。
具体实施方式
现有的双极化天线，以CN 108172978 A为例进行说明，该专利文献中描述的双极化天线，如图1和图2所示，包含四个偶极子12，四个偶极子12依次设置并形成一个辐射面，一个偶极子12即为一个振子，两个振子为一对，两对阵子对称相向设置，且以正交极化的形式布置；四个偶极子的臂连分别接于相应馈电巴伦16的顶端，每个偶极子12连接有一对馈电巴伦16，为偶极子12馈电并提供支撑；馈电巴伦16呈辐射状轴对称地连接于底座14；每个偶极子设有一个加载元件18，加载元件18沿着偶极子臂放置，且由电介质元件固定在偶极子臂上，四个偶极子12一一对应四个加载单元18且四个加载单元18呈轴对称设置；加载元件18的中部设置于相邻偶极子臂末端之间；该辐射单元的顶视图为方形结构；四个偶极子12一一对应四个介质单元19且四个介质单元19呈轴对称设置，介质单元19设于加载单元18与偶极子12之间，各加载单元18和各介质单元19固定连接于各偶极子12上并与各偶极子12组成类微带线结构。四个偶极子12分别为第一偶极子12a、第二偶极子12b、第三偶极子12c和第四偶极子12d，第一偶极子12a包括两个第一单元臂122a，第二偶极子12b包括两个第二单元臂122b，第三偶极子12c包括两个第三单元臂122c，第四偶极子12d包括两个第四单元臂122d。相邻的第一单元臂122a和第二单元臂122b、相邻的第二单元臂122b和第三单元臂122c、相邻的第三单元臂122c和第四单元臂122d及相邻的第四单元臂122d和第一单元臂122a分别对应共用一个加载单元18和一个介质单元19。加载元件18与偶极子臂耦合长度大约是单个偶极子臂的长度的两倍，因此含加载元件18的这个设计大大减小了辐射单元的尺寸和高度，但不能提升对交叉极化比。
为此，本申请创造性的提出，一种结构改进的宽带双极化天线，如图3所示，包括反射板和布置在反射板上的辐射单元，其辐射单元包含了四个偶极子，四个偶极子呈方形结构排布并安装于反射板上；每个偶极子的两个臂连分别接于两个支撑导体的顶端，两个支撑导体的底端连接于一个安装于反射板的公共底座上；两个支撑导体相互平行，并且两个支撑导体的顶端由缺口槽将其彼此隔开，两个支撑导体中一个导体具有纵向槽和横向槽，纵向槽沿支撑导体的长度方向设置，纵向槽设置有分离导体，分离 导体与缺口槽相邻，横向槽设置于支撑导体底端，横向槽将分离导体与所述公共底座分隔开；四个偶极子分别具有四条激励辐射单元的传输线，四条传输线分别连接到相应的分离导体的底部末端；偶极子臂上放置有附加导体，附加导体通过塑料支撑件将其固定在相应的偶极子臂上；附加导体的末端向偶极子臂弯折，并通过电介质薄膜将其与偶极子臂的端面隔离开。其中，激励辐射单元的四条传输线连接到分离导体部件的四个底部末端；分离导体的底部末端直接连接于同轴电缆的内导体，或与放置于公共基座上或反射板上的印制电路板上构建的馈电网络的带状线连接。
与现有的技术方案相比，本申请的宽带双极化天线在+/-60度覆盖扇区边沿的交叉极化比增加，具体的，天线包含了附加导体和导向槽，附加导体沿着偶极子臂放置，导向槽设置在支撑导体内；附加导体和纵向槽的形状结构及尺寸的变化会影响天线的辐射特性；因此可以通过调整偶极子臂或附加导体或导向槽的尺寸改善天线在宽频带范围上的交叉极化比。
并且，本申请的双极化天线具有更宽频带的特性，具体的，支撑导体上的分离导体由纵向槽隔开，并组成一条连接于偶极子臂与馈线之间的传输线；因此，在实际运用中，可以通过调整支撑导体以及纵向槽的切口与凸台的尺寸，来改善偶极子与馈线在宽频带范围内的匹配度。
本申请的双极化天线更易于与波束形成网络的连接，本申请的天线中，激励辐射单元的四条同轴电缆连接到四个分离导体的底部末端，支撑导体位于公共底座附近并放置在反射板上；可见本申请的双极化天线用于连接波束形成网络的同轴电缆的长度大大减小。另外，本申请的一种实现方式中，分离导体的底部末端直接连接于带状线，该带状线布置在公共底座或反射板上的印制电路板构建的馈电网络，印制电路板包含了附加匹配电路，或波束形成网络的某些部件，例如功分器、滤波器、双工器等；在这种情况下，完全可以不使用同轴电缆。因此，本申请的双极化天线更易于与波束形成网络的连接。
此外，本申请的双极化天线的低频辐射体能更好地兼容双频带阵列天线，本申请的辐射单元高度减小，低频辐射单元内部的高频辐射单元发生的波束畸变也减小。本申请的天线设计，能通过调整附加导体和纵向槽的尺寸来改善阵列天线在宽频带范围内的交叉极化比和隔离度，并补偿相邻辐射体之间的耦合。
下面通过具体实施例和附图对本申请作进一步详细说明。以下实施例仅对本申请进行进一步说明，不应理解为对本申请的限制。
实施例一
本例的宽带双极化天线，包括反射板和安装在反射板上的辐射单元，如图3所示，图中A图和B图分别为其A部位和B部位的放大结构示意图；辐射单元包含了四个偶极子，即第一偶极子1a、第二偶极子1b、第三偶极子1c和第四偶极子1d，四个偶极子呈方形结构排布并放置在反射板2上；第一偶极子1a具有两个偶极子臂21a和22a，第二偶极子1b具有两个偶极子臂21b和22b，第三偶极子1c具有两个偶极子臂21c和22c，第四偶极子1d具有两个偶极子臂21d和22d；第一偶极子1a的两个偶极子臂21a和22a分别连接于导体元件23a和24a的顶端，第二偶极子1b的两个偶极子臂21b和22b分别连接于导体元件23a和24a的顶端，第三偶极子1c的两个偶极子臂21c和22c分别连接于导体元件23c和24c的顶端，第四偶极子1d的两个偶极子臂21d和22d分别连接于导体元件23d和24d的顶端；所有导体元件23a至23d、24a至24d背离反射板2的长边方向倾斜，与反射板2成45度角，所有导体元件的底端连接于公共底座3上，并放置在反射板上；一个偶极子的两个偶极子臂的导体元件相互平行，且其顶端由缺口槽将两者隔开，例如导体元件23a和24a由缺口槽4a隔开、导体元件23b和24b由缺口槽4b隔开、导体元件23c和24c由缺口槽4c隔开、导体元件23d和24d由缺口槽4d隔开，导体元件23a至23d和24a至24d即四个偶极子的支撑导体；其中，一个偶极子的两个导体元件中的一个导体元件具有纵向槽和横向槽，纵向槽沿导体元件的长度方向延伸，纵向槽设置有分离导体，分离导体与缺口槽相邻，例如，导体元件23a具有纵向槽5a、导体元件23b具有纵向槽5b、导体元件23c具有纵向槽5c、导体元件23d具有纵向槽5d，纵向槽5a设置有与缺口槽4a相邻的分离导体6a、纵向槽5b设置有与缺口槽4b相邻的分离导体6b、纵向槽5c设置有与缺口槽4c相邻的分离导体6c、纵向槽5d设置有与缺口槽4d相邻的分离导体6d；横向槽设置于导体元件的底端，横向槽将分离导体与公共底座分隔开，例如横向槽7a至7d分别将分离导体6a至6d与公共底座3分隔开；同时，分离导体6a至6d底端的横向槽也将其与导体元件23a至23d隔开，并将导体元件23a至23d与公共底座3隔开；因 此，本例的这个设计中，分离导体6a和一个偶极子的两个导体元件中的另一个导体元件24a由缺口槽4a隔开并组成传输线，该传输线一一对应连接于偶极子臂21a和22a；其余三个分离导体6b至6d同样与另一个导体元件24b至24d组成传输线，并一一对应连接于偶极子臂21b至21d和22b至22d；激励辐射单元的四条同轴电缆的内导体一一对应连接于分离导体部件6a至6d的底部末端，而同轴电缆的外导体则连接于公共底座3上，如图3的B图所示，例如同轴电缆8a的内导体连接于分离导体6a的底部末端、外导体连接于公共底座3上，同轴电缆8b的内导体连接于分离导体6b的底部末端、外导体连接于公共底座3上。
各个偶极子的偶极子臂上分别放置有附加导体9a、9b、9c和9d，例如第一偶极子1a的两个偶极子臂21a和22a上放置附加导体9a，以此类推；附加导体通过塑料支撑件20固定在偶极子臂上；以第一偶极子1a的附加导体为例，附加导体9a的中间部分沿着偶极子1a的臂21a和22a与缺口槽4a反向放置；附加导体元件9a的末端向偶极子臂弯曲，并通过电介质薄膜26将其与偶极子臂的端面隔离开，如图3的A图所示；附加导体9a末端与偶极子1a的臂21a和22a的末端之间会产生极强的电容耦合，而偶极子1a的输入阻抗的大小又取决于附加导体9a与偶极子臂21a和22a之间的耦合度，因此在实际运用中可以通过调整附加导体元件9a的尺寸以及电介质薄膜26的厚度，来改变偶极子1a在宽频带范围内的阻抗；其它三个附加导体9b、9c和9d的设置与第一偶极子上的附加导体9a类似，在此不累述。
本例的双极化天线中，每个偶极子的第一导体元件23a的分离导体部件6a与第二导体元件24a由缺口槽4a隔开，并组成一条传输线，该传输线连接在偶极子的两个偶极子臂21a和22a以及馈线之间；在实际运用中，可以尝试通过调整缺口槽4a，导体元件23a和24a的尺寸来获得所需要的匹配电路，并改善偶极子1a与同轴电缆8a之间的匹配。同轴电缆一一对应连接到与公共底座3旁的分离导体的底部末端，与连接到导体顶端旁的同轴电缆的已知天线相比，本例所采用的同轴电缆长度更短。
综上可见，这种新型导体元件23a至23d及附加导体9a至9d的结构设计，为提升优选的双极化天线的辐射单元与馈线之间的匹配提供了更多的可能，也为简化辐射单元与波束形成网络之间的连接提供了更多的可实现性。
实施例二
本例的宽带双极化天线与实施例一类似，所不同的是，如图4所示，四个偶极子的偶极子臂使辐射单元的辐射面外轮廓呈圆形结构；附加导体呈弧形结构，安装在偶极子臂上方；塑料支撑件20为环状结构；与第一实施例中具有八边形外轮廓结构的辐射单元相比，本例设计的辐射单元能够得到更高的增益。
以其中第一偶极子为例，其导体元件24a和分离导体6a包含了切口25a及凸台27a，这些切口和凸台可以改变由导体元件24a和分离导体6a组成的传输线的电阻；因此在实际运用中可以通过调整切口25a和凸台27a的尺寸，及其在导体上的位置，来实现优选的辐射单元与波束形成网络之间的良好匹配。其余偶极子的情况类似，例如第二偶极子的分离导体6b包含了切口25b及凸台27b，其功能和作用与第一偶极子相同。
同样以第一偶极子为例，其导体元件24a还包括纵向槽28a，纵向槽28a与分离导体6a一一对应并反向设置；这些纵向槽与由导体元件24a合分离导体6a组成的传输线串联，进而产生电感，并抑制频率，产生的电长度为四分之一波长；在这个设计中的纵向槽构成匹配电路以及滤波器的附加部件，可剔除输入信号中不想要的高频率。同样的，第二偶极子的导体元件也包括纵向槽28b。
公共底座3放置在反射板2的板面上，并连接于四个分离导体6a至6d的底部末端，四个分离导体6a至6d分别对应连接于带状线29a至29d，带状线29a至29d放置在介质衬底30的上表面，介质衬底30放置在反射板2上；一组带状线29a和29c分别连接于第一偶极子1a和第三偶极子1c，获得第一个极化，且连接于带状线31a的第一末端；另一组带状线29b和29d分别连接于第二偶极子1b和第四偶极子1d，获得第二个极化，且连接于另一带状线31b的第一末端；连接极化偶极子的两条带状线31a和31b的第二末端分别连接于两条同轴电缆的内导体32a和32b，该同轴电缆的外导体焊接在导电膜上，该导电膜覆盖介质衬底30的下表面；开路枝节33a和34a连接于连接第一个极化的带状线31a上，另一开路枝节33b和34b则连接于连接第二极化的带状线31b上，共同构成匹配电路，可有效抑制频率干扰。
本例的双极化天线与同轴电缆匹配良好，可直接连接于具有功分器、 滤波器以及其它匹配电路部件的印制电路板；介质衬底30放置在反射板2上，由于反射板2的尺寸较大，这样就有更多空间增加介质衬底的尺寸，以及增加波束形成网络的其它部件，比如双工器。
实施例三
本例的宽带双极化天线与实施例一类似，所不同的是，如图5所示，附加导体9a至9d放置在相应的偶极子臂上方；四个偶极子的偶极子臂共同构成辐射单元的外轮廓，该外轮廓呈八边形；导体元件的底部倾向反射板2，组成90度角；导体元件的顶部平行于反射板2；这种形状结构可以有更多的空间摆放位于公共底座3上的介质衬底35；位于导体元件之间的缺口槽的尺寸随着缺口槽越靠近偶极子臂，其缺口尺寸越大，缺口槽末端呈喇叭形；纵向槽只开设在偶极子两个导体元件中的一个导体元件上与反射板2垂直的部分；这样安排导体元件和缺口槽的设置可以使天线获得60度的半功率波束宽度，并且改善辐射单元与馈线的匹配。
四个分离导体的底部末端分别直接连接于相应的四条带状线的第一末端，例如，第一偶极子的分离导体6a底部末端连接于其相应带状线的第一末端、第二偶极子的分离导体6b底部末端连接于其相应带状线36b的第一末端、第三偶极子的分离导体6c底部末端连接于其相应带状线36c的第一末端、第四偶极子的分离导体6d底部末端连接于其相应带状线36d的第一末端；四条带状线放置在位于公共底座3上的介质衬底35的上表面，并连接于偶极子；偶极子与馈电电缆37有第一馈电电缆37a和第二馈电电缆37b组成，如图5的局部放大图所示，两条馈电电缆的内导体具有相同的极化；馈电电缆的外导体焊接到公共基座3或覆盖介质衬底35下表面的导电膜上；四条带状线也可以构成匹配电路，以及放置在交叉布置的带状线上的导电电桥38等其它元件。
实施例四
本例的宽带双极化天线与实施例一类似，所不同的是，如图6所示，四个偶极子的偶极子臂使得辐射单元的辐射面外轮廓呈八边形结构；各偶极子的两个臂的末端具有向下延伸的指向反射板2的导体凸出部39，该导体凸出部位于四个偶极子合围的空间外侧；这些导体凸出部可以增加偶极子臂的电长度，从而使得偶极子臂的长度变短，减小辐射单元的尺寸。
四个附加导体9a至9d沿着辐射单元的外边沿弯折，放置在高于偶极子所在平面；塑料支撑板40固定用于支撑四个偶极子的导体元件，该结构设计在增加由导体元件组成的传输线的电长度的同时，减少了来自这些传输线之间的辐射干扰；由于塑料支撑板40支撑的导体向传输线产生的电长度与长度更长但没有塑料支撑板的导体产生的电长度等效，因此辐射单元可放置在离反射板2更近距离的位置上，这样可以减小天线体积。
实施例五
本例的宽带双极化天线与实施例四类似，所不同的是，如图7所示，各偶极子的两个臂的末端具有向下延伸的指向反射板2的导体凸出部41，该导体凸出部位于四个偶极子合围的空间内侧；同样的，这种导体凸出部设计可以增加偶极子臂的电长度，因此可以缩小偶极子臂的长度，从而实现辐射单元小型化的目的。
四个附加导体元件沿着辐射单元的外边沿弯折，并放置在低于偶极子臂所在平面，这样设计可以削减本实施例中的辐射单元的高度；塑料支撑板42包含了纵向槽43和44，用来固定连接一个偶极子的两个导体元件，其中一个纵向槽与缺口槽连通。相较于现有的其它结构，本例具有纵向槽43和44的塑料支撑板42能够更有效地增加由导体元件组成的传输线的电长度。另外，本例还有四个L型导电元件45a、45b、45c和45d，四个L型导体元件倒置放置在塑料支撑板20上，并与各缺口槽相对应，这样的结构安排可以改善天线的交叉极化比，以及辐射单元与馈线的匹配度。
实施例六
本例的宽带双极化天线与实施例五类似，所不同的是，如图8所示，四个附加导体元件9a至9d放置于相应的偶极子臂下方，这样可以缩减辐射单元的高度；另外，四个L型导体46a、46b、46c和46d分别放置在相邻偶极子臂端之间的塑料支撑板20上，可以改良交叉极化比。另外，本例的宽带双极化天线还增加了高频天线47，高频天线47放置在位于反射板2上的辐射单元的中心部位，构成共轴的多频段天线。
实施例七
本例的宽带双极化天线与实施例一类似，所不同的是，如图9所示， 四个附加导体9a至9d沿着偶极子臂的外边沿弯折，并放置于相应偶极子臂所在平面；附加导体的末端直接连接于偶极子臂的末端。这样的结构设计，可以使本实施例中的天线包含的零部件减少。
实施例八
本例提供了一种双频双极化阵列天线，如图10所示，本例的天线阵列包含了六个宽带双极化天线48以及独立高频天线49，宽带双极化天线48为图8所示天线，是在低频天线中设置有高频天线47形成的共轴的多频段天线；各独立高频天线49放置在反射板50长边方向上的宽带双极化天线48之间，反射板50的两个侧边具有纵向边墙，即侧壁51；L型隔离导体52放置在反射板50上，设置于辐射单元的两侧面，且有至少一个背向宽带双极化天线48；附加侧壁53放置在反射板50上，且有至少一个背向宽带双极化天线48。本例的双频双极化阵列天线，如图10所示，附加侧壁设置于两端的辐射单元两侧，L型隔离导体设置于中间的辐射单元的两侧。本例的宽带双极化天线可以采用实施例一至实施例七中任一种，并可以在较宽频带范围内获得该双频双极化天线所需要的电压驻波比、交叉极化比、各端口之间的隔离度以及其它天线特性。特别是偶极子臂、偶极子支撑导体、分离导体、纵向槽、缺口槽、切口、凸台、附加导体、L型导体等，这些结构可根据实际需要灵活设置为对称或者非对称结构，用于补偿相邻天线之间的耦合，同时获得该双频双极化天线所期望的辐射特性。
对本例的双极化阵列天线的样品在微波暗室里测试，测试结果显示，本例双极化阵列天线具有60-65度的半功率波束宽度，工作的相对带宽至少为46％，+/-60度覆盖扇区边沿的交叉极化比不小于-10dB。并且，本例的双极化天线在宽频带范围内的匹配性良好，易于与波束形成网络连接，能够满足大多数的实际运用需求。
以上内容是结合具体的实施方式对本申请所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干简单推演或替换。

Claims (35)

  1. 一种宽带双极化天线，包括反射板和布置在反射板上的辐射单元，其特征在于：所述辐射单元包含了四个偶极子，四个偶极子组合后安装在反射板上；
    每个偶极子的两个臂分别连接于两个支撑导体的顶端，两个支撑导体的底端连接在一个安装于所述反射板的公共底座上；
    所述两个支撑导体由缺口槽将其彼此隔开，其中一个导体具有纵向槽和横向槽，所述纵向槽沿支撑导体的长度方向设置，纵向槽设置有分离导体，分离导体与缺口槽相邻，所述横向槽设置于支撑导体底端，横向槽将所述分离导体与所述公共底座分隔开；
    激励辐射单元的四个偶极子的四条传输线分别连接到相应的分离导体的底部末端；
    所述传输线包括同轴电缆、金属带状线、印制电路板微带线和波导管的至少一种；
    偶极子臂放置有附加导体，附加导体通过塑料支撑件将其固定在相应的偶极子臂上；
    所述附加导体的末端向偶极子臂弯折，并通过电介质薄膜将其与偶极子臂的端面隔离开。
  2. 根据权利要求1所述的宽带双极化天线，其特征在于：连接偶极子和反射板的支撑导体与反射板成30-90度倾斜角。
  3. 根据权利要求1所述的宽带双极化天线，其特征在于：所述分离导体的长度边沿上有凹的切口和凸出的凸台。
  4. 根据权利要求1所述的宽带双极化天线，其特征在于：两个支撑导体顶端的缺口槽呈喇叭形结构，喇叭的敞口朝向偶极子臂。
  5. 根据权利要求1所述的宽带双极化天线，其特征在于：每个偶极子的两个臂共同采用一组附加导体，每组附加导体由塑料支撑件固定。
  6. 根据权利要求5所述的宽带双极化天线，其特征在于：所述塑料支撑件在所述缺口槽处具有凸出的凸台，凸台置于缺口槽中，填充缺口槽。
  7. 根据权利要求5所述的宽带双极化天线，其特征在于：所述塑料支撑件设置有凸出的凸台，凸台置于与缺口槽相邻的纵向槽中，填充纵向槽。
  8. 根据权利要求1所述的宽带双极化天线，其特征在于：所述偶极子臂的外边沿具有向下延伸指向反射板的导体凸出部；所述导体凸出部位于四个偶极子合围的空间外侧。
  9. 根据权利要求1所述的宽带双极化天线，其特征在于：所述偶极子臂的内边沿具有向下延伸指向反射板的导体凸出部；所述导体凸出部位于四个偶极子合围的空间内侧。
  10. 根据权利要求1所述的宽带双极化天线，其特征在于：所述偶极子臂向辐射单元的中心部位弯曲，使得四个偶极子组成的辐射单元的顶部整体外轮廓呈圆形，矩形或多边形。
  11. 根据权利要求1所述的宽带双极化天线，其特征在于：在偶极子的两个臂的末端之间的塑料支撑板上设置有L型导体。
  12. 根据权利要求1所述的宽带双极化天线，其特征在于：在相邻的偶极子之间的塑料支撑板上设置有L型导体。
  13. 根据权利要求1所述的宽带双极化天线，其特征在于：激励辐射单元的四个偶极子的传输线均为同轴电缆，所述分离导体的底端直接连接于同轴电缆的内导体，同轴电缆的外导体连接于所述公共底座上。
  14. 根据权利要求1所述的宽带双极化天线，其特征在于：激励辐射单元的四个偶极子的传输线为印制电路板，所述分离导体的底端的四个末端与在印制电路板上构建的馈电网络的带状线连接。
  15. 根据权利要求1或14所述的宽带双极化天线，其特征在于：所述印制电路板上构建的馈电网络的两个端口与两根同轴电缆或者金属带状线连接，作为输入端口。
  16. 根据权利要求1或14所述的宽带双极化天线，其特征在于：所述印制电路板放置于公共基座上。
  17. 根据权利要求1或14所述的宽带双极化天线，其特征在于：所述印制电路板放置于反射板上。
  18. 根据权利要求1或14所述的宽带双极化天线，其特征在于：所述印制电路板馈电网络设置有包括短路和开路枝节的匹配电路。
  19. 根据权利要求1或14所述的宽带双极化天线，其特征在于：所述馈电网络包括由避开间隙相互隔离开的交叉布置的带状线，以及与避开间隙相邻且连接带状线两末端的导电电桥。
  20. 根据权利要求1所述的宽带双极化天线，其特征在于：所述附加导体放置在偶极子臂的上方。
  21. 根据权利要求1所述的宽带双极化天线，其特征在于：所述附加导体放置在偶极子臂的下方。
  22. 根据权利要求1所述的宽带双极化天线，其特征在于：所述附加导体与偶极子臂一体成型，附加导体沿着偶极子臂的外边沿向下弯折，指向反射板方向，放置在低于偶极子臂所在平面。
  23. 根据权利要求1所述的宽带双极化天线，其特征在于：所述附加导体与偶极子臂一体成型，附加导体沿着偶极子臂的外边沿向上弯折，背离反射板方向，放置在高于偶极子臂所在平面。
  24. 根据权利要求1所述的宽带双极化天线，其特征在于：所述附加导体沿着偶极子臂同一平面的外边沿弯折，且附加导体末端直接连接于偶极子臂，或者附加导体直接焊接在偶极子上。
  25. 根据权利要求1所述的宽带双极化天线，其特征在于：还包括聚焦元件，所述聚焦元件放置在辐射单元上方。
  26. 根据权利要求1所述的宽带双极化天线，其特征在于：四个偶极子、连接偶极子的支撑导体和公共底座为导电材料制备的一体成型结构。
  27. 根据权利要求26所述的宽带双极化天线，其特征在于：所述四个偶极子、连接偶极子的支撑导体和公共底座通过压铸、冲压或3D打印工艺制成一体式结构。
  28. 根据权利要求1所述的宽带双极化天线，其特征在于：四个偶极子、连接偶极子的支撑导体、公共底座和附加导体为导电材料制备的一体成型结构。
  29. 根据权利要求28所述的宽带双极化天线，其特征在于：所述四个偶极子、连接偶极子的支撑导体、公共底座和附加导体通过压铸、冲压或3D打印工艺制成一体式结构。
  30. 根据权利要求1所述的宽带双极化天线，其特征在于：还包括高频带天线，高频带天线设置于四个偶极子围成的空腔内，构成共轴的多频段天线。
  31. 根据权利要求1-30任一项所述的宽带双极化天线，其特征在于：有至少两个辐射单元放置于反射板上构成双极化阵列天线。
  32. 根据权利要求31所述的宽带双极化天线，其特征在于：所述至少两个辐射单元中，至少一个为非对称结构，用于补偿相邻的天线之间的耦合，同时获得所述双频双极化天线所期望的辐射特性。
  33. 根据权利要求1-30任一项所述的宽带双极化天线，其特征在于：所述反射板上至少设有两个侧壁。
  34. 根据权利要求27或29所述的宽带双极化天线，其特征在于：所述反射板上，在与辐射单元相邻的侧面位置上至少设置有一个向上延伸的附加侧壁。
  35. 根据权利要求27或29所述的宽带双极化天线，其特征在于：所述反射板上，在与辐射单元相邻的侧边面置上至少设置有一个向上延伸的L型隔离导体。
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CN109980329A (zh) * 2019-03-12 2019-07-05 广东司南通信科技有限公司 一种宽带双极化天线

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CN113328240A (zh) * 2021-05-21 2021-08-31 大连海事大学 可有效抑制后向交叉极化的宽轴比波束双频北斗导航天线
CN113328240B (zh) * 2021-05-21 2022-05-10 大连海事大学 可有效抑制后向交叉极化的宽轴比波束双频北斗导航天线
CN116487872A (zh) * 2023-05-17 2023-07-25 江苏亨鑫科技有限公司 一种具有pcb功分馈电结构低频辐射单元
CN116487872B (zh) * 2023-05-17 2024-02-09 江苏亨鑫科技有限公司 一种具有pcb功分馈电结构低频辐射单元

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