Bowl-shaped radiation unit and antenna

Abstract

The invention is applicable to the technical field of wireless communication, and provides a bowl-shaped radiating element, which comprises a radiating body and a power division feed network, the power division feed network is arranged at the bottom of the radiating body, the radiating body comprises two dipoles which are orthogonally distributed, and the dipoles are respectively polarized at + / -45 degrees; the power dividing feed network comprises two power dividing plate microstrip lines, a microstrip line main intersection is arranged between the two power dividing plate microstrip lines, microstrip line branch intersections are arranged at the two ends of the two power dividing plate microstrip lines respectively, at least two cylinders are arranged at the bottom of the radiator, feed needles are arranged in the two cylinders respectively, and the feed needles are connected with the power dividing plate microstrip lines. The upper end of the feed needle is connected with the microstrip line main intersections of the two power dividing plate microstrip lines, and the dipole is connected with the microstrip line branch intersections of the two power dividing plate microstrip lines. Therefore, the aperture of the antenna is reduced, the welding installation process is simplified, and the layout of the radiation unit on the antenna is optimized.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a bowl-shaped radiation unit and an antenna. Background Art

[0002] With the development of the communications industry, miniaturized, multi-band, base station antennas are increasingly becoming the mainstream antennas used in the communications industry. In order to improve space utilization, coaxial nested oscillators have become an excellent choice, that is, embedding high-frequency oscillators into low-frequency arrays. However, the existing bowl-shaped radiation units used for coaxial nesting have large calibers, cumbersome welding, and too many cables on the back of the reflector, which affect the overall layout. These are problems that cannot be ignored. Simply reducing the caliber size of the radiation unit will not only reduce the gain of the radiation unit, but also affect the circuit matching, causing the deterioration of the standing wave ratio.

[0003] In summary, the existing technology has obvious inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0004] In view of the above-mentioned defects, the purpose of the present invention is to provide a bowl-shaped radiation unit and antenna, so as to reduce the diameter size of the radiation unit, simplify the welding and installation process, and optimize the layout of the radiation unit on the antenna.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a bowl-shaped radiation unit, including a radiator and a power division feeding network, wherein the power division feeding network is arranged at the bottom of the radiator, and the radiator includes two orthogonally distributed dipoles, and the dipoles are respectively placed by ±45° polarization; the power division feeding network includes two power division board microstrip lines, and microstrip line main intersections are respectively arranged in the middle of the two power division board microstrip lines, and microstrip line branch intersections are respectively arranged at both ends of the two power division board microstrip lines, at least two cylinders are arranged at the bottom of the radiator, and feeding needles are respectively arranged in the two cylinders, and the upper ends of the feeding needles are respectively connected to the microstrip line main intersections of the two power division board microstrip lines, and the dipoles are respectively connected to the microstrip line branch intersections of the two power division board microstrip lines.

[0006] According to the bowl-shaped radiation unit of the present invention, the radiator includes at least four dipole arms, a base and a balun arm, the four dipole arms and the balun arms are respectively fixed on the base, the four dipole arms are symmetrically arranged around the radiator, the dipole arm is disconnected in the middle and connected to a vertical arm, the balun arm is arranged between two adjacent dipole arms, and a coupling metal sheet is provided on the vertical arm.

[0007] According to the bowl-shaped radiation unit of the present invention, the radiator is connected to the power division feeding network by riveting.

[0008] According to the bowl-shaped radiation unit of the present invention, the base, the balun arm and the dipole arm are integrally formed.

[0009] According to the bowl-shaped radiation unit of the present invention, a plastic piece is provided on the vertical arm, and the plastic piece disconnects the coupling metal sheet from the radiator electrically.

[0010] The bowl-shaped radiation unit according to the present invention is also provided with a side wall, and the radiator is fixed on the side wall.

[0011] According to the bowl-shaped radiation unit of the present invention, the bowl-shaped radiation unit is made by die-casting.

[0012] The present invention further provides an antenna, comprising a reflector, on the front side of which a plurality of bowl-shaped radiation units as described in any one of claims 1 to 7 are distributed.

[0013] According to the antenna of the present invention, a phase-shift feeding network is provided on the reverse side of the reflector, and the phase-shift feeding network is connected to the lower end of the feeding needle of the cylinder.

[0014] According to the antenna of the present invention, at least three metal studs are provided at the bottom of the radiator, and the three metal studs are respectively screwed to the reflector.

[0015] The present invention provides a bowl-shaped radiation unit and antenna, including a radiator, a power division feeding network and a reflector, wherein the power division feeding network is arranged at the bottom of the radiator, the radiator includes two orthogonally distributed dipoles, at least two cylinders are arranged at the bottom of the radiator, and feeding needles are respectively arranged in the two cylinders, and the upper ends of the feeding needles are respectively welded to the microstrip line main intersections on the power division board microstrip line of the power division feeding network, and the microstrip line branch intersections of the power division board microstrip line are connected to the dipoles placed at ±45° polarization through coaxial cables to realize signal combination of the two dipoles, and further, the lower end of the feeding needle is welded to the phase-shifting feeding network on the back of the reflector through a coaxial cable, so that the phase-shifting feeding network feeds a polarized dipole, reducing the number of coaxial cables on the back of the reflector. By this, the present invention realizes the reduction of the antenna caliber, simplifies the welding and installation process, and optimizes the layout of the radiation unit on the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional schematic diagram of a preferred bowl-shaped radiation unit of the present invention;

[0017] Figure 2 It is a schematic diagram of the bottom structure of a preferred bowl-shaped radiation unit of the present invention;

[0018] Figure 3 It is a structural schematic diagram of a power division feeding network of a preferred bowl-shaped radiation unit of the present invention;

[0019] Figure 4 is a schematic side view of the structure of a preferred bowl-shaped radiation unit of the present invention;

[0020] Figure 5 It is a schematic diagram of the preferred bowl-shaped radiation unit and the reflector installation part of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] like Figures 1 to 5 As shown, the present invention provides a bowl-shaped radiation unit 100, including a radiator 1 and a power division feeding network 2, wherein the power division feeding network 2 is arranged at the bottom of the radiator 1, and the radiator 1 includes two orthogonally distributed dipoles, and the dipoles are respectively placed by ±45° polarization; the power division feeding network 2 includes two power division board microstrip lines 21, 22, that is, the power division feeding network 2 is composed of two power division board microstrip lines 21, 22, and the two power division board microstrip lines 21, 22 are respectively provided with microstrip line main intersections in the middle, and the two ends of the two power division board microstrip lines 21, 22 are respectively provided with microstrip line branch intersections 212, 213, 222, 223, and at least two cylinders 11, 12 are provided at the bottom of the radiator 1, and the two cylinders 11, 12 are respectively provided with feeding needles 111, 121, and the upper ends of the feeding needles 111, 121 are respectively connected to the microstrip of the two power division board microstrip lines 21, 22. The main intersections 211 and 221 of the line are connected, and the lower ends of the feeding needles 111 and 121 are connected to the reflector of the antenna. Specifically, the lower ends of the feeding needles 111 and 121 are welded to the phase-shift feeding network on the back of the reflector through cables, and the two dipoles are respectively connected to the microstrip line branch intersections 212, 213, 222, and 223 of the two power splitter board microstrip lines 21 and 22. The microstrip line branch intersections 212, 213, 222, and 223 of the power splitter board microstrip lines 21 and 22 of the power splitter feeding network 2 are connected to the feeding points of the dipoles placed with ±45° polarization through coaxial cables. The cylinders 11 and 12 realize the combination of signals of the two dipoles. When the radiating unit 100 is applied to the antenna, the phase-shift feeding network and the cylinders 11 and 12 are connected only through a coaxial cable, so that the phase-shift feeding network feeds two dipoles of one polarization, effectively reducing the number of coaxial cables on the back of the reflector.

[0023] Thereby, the present invention reduces the diameter of the antenna, simplifies the welding installation process, and optimizes the layout of the radiation unit 100 on the antenna.

[0024] Preferably, if Figure 1As shown, the radiator 1 includes at least four dipole arms 13, a base and a balun arm 14, the four dipole arms 13 and the balun arms 14 are respectively fixed on the base, the base supports the dipole arms 13 and the balun arms 14, and the base also plays a shape-preserving role for the dipole arms 13 and the balun arms 14, the four dipole arms 13 are symmetrically arranged around the radiator 1, the dipole arms 13 are disconnected in the middle and connected to the vertical arms 15, the balun arms 14 are arranged between two adjacent dipole arms 13, the vertical arms 15 are provided with a coupling metal sheet 16, an inductor or a capacitor is installed on the coupling metal sheet 16, the impedance matching is optimized, so that the transmission loss of the radiation unit 100 signal is smaller, and the signal loss and loss are reduced.

[0025] Preferably, the radiator 1 is connected to the power division feeding network 2 by riveting, and the ground of the radiator 1 is connected to the power division feeding network 2 by rivets, so that the structure is more stable.

[0026] Preferably, the base, the balun arm 14 and the dipole arm 13 are integrally formed to reduce the size of the radiation unit 100 .

[0027] Preferably, a plastic part is provided on the vertical arm 15, and the plastic part cuts off the electrical connection between the coupling metal sheet 16 and the radiator 1. The vertical arm 15 and the coupling metal sheet 16 are always in a coupled state. At this time, the coupling metal sheet 16 and the radiator 1 are disconnected by the plastic part, thereby cutting off the electrical connection between the coupling metal sheet 16 and the radiator 1 and reducing signal reflection.

[0028] Preferably, a side wall 3 is further provided, and the radiator 1 is fixed on the side wall 3. The side wall 3 further strengthens the structural strength of the radiator 1 and reduces signal reflection.

[0029] Preferably, the bowl-shaped radiation unit 100 is made by die-casting and coupled feeding, thereby saving the electroplating cost of the main part of the radiation unit 100 .

[0030] In actual applications, the radiation unit 100 includes, in addition to the bowl-shaped radiation unit 100 of the present embodiment, at least one low-frequency radiation unit array, at least one high-frequency radiation unit array, at least one low-frequency array and at least one high-frequency array adjacent array, a high-frequency radiation unit array between two adjacent low-frequency radiation units, and optimally a high-frequency radiation unit is nested in a low-frequency radiation unit.

[0031] The present invention provides an antenna, comprising a reflector, on the front of which a plurality of bowl-shaped radiation units 100 are distributed.

[0032] Preferably, a phase-shift feeding network is provided on the back side of the reflector, and the phase-shift feeding network is connected to the lower ends of the feeding needles 111 and 121 of the cylinders 11 and 12, and the upper ends of the feeding needles 111 and 121 of the cylinders 11 and 12 are connected 211 and 221 to the main microstrip line intersections of the power splitter board microstrip lines 21 and 22, and the microstrip line branch intersections 212, 213, 222, and 223 of the power splitter board microstrip lines 21 and 22 of the power splitter feeding network 2 are connected to the feeding points of the dipoles placed with ±45° polarization through coaxial cables, and the cylinders 11 and 12 realize the combination of signals of the two dipoles. The phase-shift feeding network is connected to the cylinders 11 and 12 through a coaxial cable, so that the phase-shift feeding network feeds two dipoles of one polarization. At this time, the radiating unit 100 effectively reduces the number of coaxial cables on the back side of the reflector in antenna applications.

[0033] Preferably, if Figure 5 As shown, at least three metal studs 17 are provided at the bottom of the radiator 1, and the three metal studs 17 are respectively screwed to the reflector, and the reflector is directly screwed to the metal studs 17 with screws. The body of the radiator 1 is directly grounded, and the radiation unit 100 is connected to the reflector and fixed to each other.

[0034] In summary, the present invention provides a bowl-shaped radiation unit and antenna, including a radiator, a power division feeding network and a reflector, wherein the power division feeding network is arranged at the bottom of the radiator, the radiator includes two orthogonally distributed dipoles, at least two cylinders are arranged at the bottom of the radiator, and feeding needles are respectively arranged in the two cylinders, and the upper ends of the feeding needles are respectively welded to the microstrip line main intersections on the power division board microstrip line of the power division feeding network, and the microstrip line branch intersections of the power division board microstrip line are connected to the dipoles placed at ±45° polarization through coaxial cables to realize signal combination of the two dipoles, and further, the lower end of the feeding needle is welded to the phase-shifting feeding network on the back of the reflector through a coaxial cable, so that the phase-shifting feeding network feeds a polarized dipole, reducing the number of coaxial cables on the back of the reflector. By this, the present invention realizes the reduction of the antenna caliber, simplifies the welding and installation process, and optimizes the layout of the radiation unit on the antenna.

[0035] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A bowl-shaped radiation unit, characterized in that: It comprises a radiator and a power division feeding network, wherein the power division feeding network is arranged at the bottom of the radiator, the radiator comprises two orthogonally distributed dipoles, and the dipoles are respectively placed through ±45° polarization; the power division feeding network comprises two power division board microstrip lines, microstrip line main intersections are respectively arranged in the middle of the two power division board microstrip lines, and microstrip line branch intersections are respectively arranged at both ends of the two power division board microstrip lines, at least two cylinders are arranged at the bottom of the radiator, and feeding needles are respectively arranged in the two cylinders, and the upper ends of the feeding needles are respectively connected to the microstrip line main intersections of the two power division board microstrip lines, and the dipoles are respectively connected to the microstrip line branch intersections of the two power division board microstrip lines.

2. The bowl-shaped radiation unit according to claim 1, characterized in that: The radiator includes at least four dipole arms, a base and a balun arm. The four dipole arms and the balun arm are respectively fixed on the base. The four dipole arms are symmetrically arranged around the radiator. The dipole arm is disconnected in the middle and connected to a vertical arm. The balun arm is arranged between two adjacent dipole arms. A coupling metal sheet is provided on the vertical arm.

3. The bowl-shaped radiation unit according to claim 1, characterized in that: The radiator is connected to the power division feeding network by riveting.

4. The bowl-shaped radiation unit according to claim 2, characterized in that: The base, the balun arm and the vibrator arm are integrally formed.

5. The bowl-shaped radiation unit according to claim 2, characterized in that: A plastic piece is provided on the vertical arm, and the plastic piece disconnects the coupling metal sheet from the radiator electrically.

6. The bowl-shaped radiation unit according to claim 1, characterized in that: A side wall is also provided, and the radiator is fixed on the side wall.

7. The bowl-shaped radiation unit according to claim 1, characterized in that: The bowl-shaped radiation unit is made by die-casting.

8. An antenna, characterized in that: It comprises a reflecting plate, on the front side of which a plurality of bowl-shaped radiation units as claimed in any one of claims 1 to 7 are distributed.

9. The antenna according to claim 8, characterized in that A phase-shift feeding network is provided on the reverse side of the reflecting plate, and the phase-shift feeding network is connected to the lower end of the feeding needle of the cylinder.

10. The bowl-shaped radiation unit according to claim 8, characterized in that: At least three metal studs are provided at the bottom of the radiator, and the three metal studs are respectively screwed to the reflector.

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