A dual-band and dual-polarized antenna integrated with a feeding network

Abstract

The present invention discloses a dual-band and dual-polarized antenna with an integrated feeding network, which includes a horizontally polarized antenna, a vertically polarized antenna and a mounting base plate; the horizontally polarized antenna is vertically installed on the top of the mounting base plate through a fixing seat, the vertically polarized antenna is arranged parallel to the mounting base plate, and one side of the bottom of the vertically polarized antenna is fixedly installed on the mounting base plate through a fixing seat, and the other side of the bottom of the vertically polarized antenna is fixedly installed on the horizontally polarized antenna. The present invention relates to the technical field of microwave antennas. The dual-band and dual-polarized antenna with an integrated feeding network has the advantages of small size, light weight, easy processing and integration, and low cost, and also has the advantages of integrated integration of the antenna and the feeding network and arbitrary adjustment of the working frequency ratio of the two polarizations.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave antennas, and specifically provides a dual-band and dual-polarized antenna integrated with a feed network. Background Art

[0002] In a navigation system, in order to improve navigation accuracy, the navigation system usually operates in different frequency bands. The navigation antenna needs to cover different frequency bands to be received. Whether it is a broadband antenna or multiple antennas in sub-bands, the volume and weight of the antenna device are relatively large, and the cost is also high. Therefore, there is a need to develop a miniaturized and low-cost multi-frequency and multi-polarized navigation antenna.

[0003] In a radar system, as the electromagnetic environment becomes more and more complex, the requirements for active phased array antennas in the radar system are also getting higher and higher. Radar antennas are developing in the directions of dual-band and dual-polarization, large-angle beam coverage, and common aperture, etc. Dual-band and dual-polarized antennas can improve the detection and recognition capabilities of the radar for targets, and greatly enhance the adaptability of the antenna to the environment. However, common forms of dual-band and dual-polarized antennas include patch antennas, dipole antennas, helical antennas, dipole antennas and waveguide slot antennas, etc. These common aperture / nested structure dual-band and dual-polarized antennas have excellent performance, but the structure is complex and the processing cost is high.

[0004] Another research focus of dual-band and dual-polarized antennas is to design dual-band antennas with a small frequency ratio or a large frequency ratio. In dual-band antennas with a small frequency ratio, since the two operating frequency bands are close, improving the antenna isolation is an urgent problem to be solved for dual-band antennas with a small frequency ratio. In dual-band antennas with a large frequency ratio, the antenna size in the low-frequency band is relatively large, which is likely to block the antenna in the high-frequency band and affect the performance of the high-frequency band antenna.

[0005] Another disadvantage of dual-band and dual-polarized antennas is that the structure is complex and the processing cost is high. In a conventional design, a dipole antenna and a waveguide port antenna are nested and designed, and a feed network is integrated below. Such an antenna usually requires multiple printed circuit boards and a complex metal cavity structure. Although it can achieve good performance, the processing cost is relatively high.

[0006] Based on the retrieval of the above information, a dual-band and dual-polarized antenna integrated with a feed network is specifically proposed. The two frequency bands of the antenna respectively radiate electromagnetic waves of two polarizations. The feed networks of the two frequency band antennas are integrally designed and processed with the antenna. The size is small, the integration degree is high, the operating frequency bands of the two polarizations can be arbitrarily adjusted according to specific application requirements, and it has the advantages of a compact structure, easy processing and assembly, and low cost. Summary of the Invention

[0007] (1) Technical Problems to be Solved

[0008] Aiming at the deficiencies of the prior art, the present invention provides a dual-band and dual-polarized antenna integrated with a feed network, which solves the above problems.

[0009] (2) Technical Solution

[0010] To achieve the above object, the present invention provides the following technical solution: A dual - band and dual - polarization antenna integrated with a feeding network, comprising a horizontally polarized antenna, a vertically polarized antenna and a mounting base plate;

[0011] The horizontally polarized antenna is vertically mounted on the top of the mounting base plate through a fixing seat. The vertically polarized antenna is arranged parallel to the mounting base plate, and one side of the bottom of the vertically polarized antenna is fixedly mounted on the mounting base plate through a fixing seat, and the other side of the bottom of the vertically polarized antenna is fixedly mounted on the horizontally polarized antenna.

[0012] The present invention is further configured as: The horizontally polarized antenna includes a horizontally polarized radiation arm, a first dielectric substrate, a second dielectric substrate and a horizontal feeding network. The horizontally polarized radiation arm is printed on one side of the first dielectric substrate close to the second dielectric substrate, and the horizontal feeding network is printed on the side of the first dielectric substrate away from the horizontally polarized radiation arm;

[0013] The other side of the bottom of the vertically polarized antenna is fixedly mounted on the top of the second dielectric substrate.

[0014] The present invention is further configured as: The horizontally polarized radiation arm includes a metal connecting piece and four T - shaped metal pieces arranged on the metal connecting piece. The four T - shaped metal pieces are evenly spaced on the metal connecting piece, and a coupling slot is etched in the middle of the top of the T - shaped metal piece.

[0015] The present invention is further configured as: The horizontal feeding network includes a first feeding line, a T - shaped power divider, a left - hand transmission line and a right - hand transmission line. The two ends of the T - shaped power divider are respectively connected to the left - hand transmission line and the right - hand transmission line. The upper parts of the left - hand transmission line and the right - hand transmission line are in a "Π" shape and are directly below the coupling slot.

[0016] The present invention is further configured as: The vertically polarized antenna includes a vertical feeding network, a carrier metal plate and three probes. The vertical feeding network is printed on the side of the second dielectric substrate away from the horizontally polarized radiation arm. Three radiation slots are formed on the top of the carrier metal plate. The radiation slots are in an "H" shape. The three probes are respectively arranged below the three radiation slots and penetrate through the horizontally polarized antenna.

[0017] The present invention is further configured as: The vertical feeding network includes a second feeding line and a one - to - three microstrip line power divider. The three ends of the one - to - three microstrip line power divider are respectively welded and fixed to the surfaces of the three probes.

[0018] The present invention is further configured as: Both the first feeding line and the second feeding line include an outer skin and an inner conductor arranged in the outer skin;

[0019] The outer skin in the first feeder is welded and fixed to the bottom of the metal connecting piece, and the inner conductor in the first feeder is welded and fixed to the bottom of the T-shaped power divider;

[0020] The inner conductor in the second feeder is welded and fixed to the bottom of the one-to-three microstrip line power divider.

[0021] The present invention is further configured that: first avoidance holes adapted to the probes are provided on the surfaces of the first dielectric substrate, the second dielectric substrate and the metal connecting piece, and the diameter of the first avoidance holes provided on the metal connecting piece is larger than the diameters of the first avoidance holes provided on the first dielectric substrate and the second dielectric substrate, and a boss base is fixedly connected to one end of the probe;

[0022] Second avoidance holes adapted to the first feeder and the second feeder are provided on the top of the mounting base plate;

[0023] Third avoidance holes adapted to the first feeder are provided on one side of the bearing metal plate;

[0024] Mounting holes are provided on the surfaces of the fixing seat and the horizontal polarization antenna.

[0025] (III) Beneficial effects

[0026] The present invention provides a dual-band and dual-polarization antenna with an integrated feeding network. It has the following beneficial effects:

[0027] (1) Small size and light weight: The dual-band and dual-polarization antenna of the present invention has a compact structure. The feeding networks on the horizontal polarization antenna and the vertical polarization antenna and the horizontal polarization radiation arms are respectively printed on the first dielectric substrate and the second dielectric substrate. The vertical polarization antenna also makes full use of the gaps between adjacent horizontal polarization antennas, so that the antenna has the advantages of small size and light weight.

[0028] (2) Easy to process and integrate, and low cost: The antenna of the present invention adopts a modular design and processing, and is very suitable for arranging and combining into an antenna array. The antenna assembly is fixed by a fixing seat, with simple assembly and high processing yield. The raw materials, part processing and assembly costs of the antenna parts are relatively low, that is, the overall cost of the antenna is relatively low.

[0029] (3) Integration of the antenna and the feeding network: The antenna of the present invention integrally designs the feeding networks of two frequency bands / polarizations and the antenna. The two feeding networks are respectively located on the first dielectric substrate and the second dielectric substrate and are sandwiched between the bearing metal plates, without occupying additional space, with a compact structure and reduced cost of additionally connecting the feeding network.

[0030] (4) The working frequency ratios of the two polarizations can be adjusted arbitrarily: The two working frequency bands of the dual-frequency and dual-polarization antenna of the present invention can be designed according to specific application requirements. It can not only achieve operation with a small frequency ratio but also achieve dual-band operation with a large frequency ratio. At the same time, the isolation between the dual bands and dual polarizations is also good. Description of the Drawings

[0031] Figure 1 Schematic diagram of the external structure of the present invention;

[0032] Figure 2 Schematic side sectional view of the present invention;

[0033] Figure 3 Schematic diagram of the structure of the horizontal polarization antenna and the vertical feeding network of the present invention;

[0034] Figure 4 Schematic connection diagram of the first feeder line, the horizontal feeding network, and the structure of the first dielectric substrate of the present invention;

[0035] Figure 5 Schematic diagram of the structure of the vertical polarization antenna of the present invention;

[0036] Figure 6 Schematic diagram of the probe installation of the vertical polarization antenna of the present invention;

[0037] Figure 7 Schematic diagram after the probe installation of the vertical polarization antenna of the present invention;

[0038] Figure 8 Schematic connection diagram of the installation base plate and the fixed seat structure of the present invention;

[0039] Figure 9 Schematic diagram of the reflection coefficient and isolation degree curves of the two polarization ports of the present invention;

[0040] Figure 10 Schematic diagram of the result of the normalized gain pattern of the horizontal polarization antenna of the present invention;

[0041] Figure 11 Schematic diagram of the result of the normalized gain pattern of the vertical polarization antenna of the present invention;

[0042] Figure 12 Schematic diagram of the external structure in the second embodiment of the present invention;

[0043] Figure 13 Schematic side sectional view in the second embodiment of the present invention;

[0044] In the figure, 1 is a horizontally polarized antenna; 11 is a horizontally polarized radiation arm; 111 is a coupling slot; 112 is a metal connecting piece; 113 is a T-shaped metal piece; 121 is a first dielectric substrate; 122 is a second dielectric substrate; 123 is a single-layer dielectric board; 13 is a horizontal feeding network; 131 is a T-shaped power divider; 132 is a left transmission line; 133 is a right transmission line; 134 is a first feeding wire; 2 is a vertically polarized antenna; 21 is a radiation slot; 22 is a probe; 23 is a first avoidance hole; 24 is a vertical feeding network; 241 is a second feeding wire; 242 is a one-to-three microstrip line power divider; 25 is a boss base; 26 is a third avoidance hole; 27 is a bearing metal plate; 3 is a mounting base plate; 4 is a fixing seat; 41 is a mounting hole; 42 is an upper fixing frame; 51 is an outer skin; 52 is an inner conductor; 53 is a second avoidance hole. Specific embodiments

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0046] Please refer to Figure 1-13 , the embodiments of the present invention provide the following technical solutions:

[0047] Embodiment 1.

[0048] A dual-band and dual-polarized antenna integrated with a feeding network includes three groups of horizontally polarized antennas 1, three groups of vertically polarized antennas 2, a mounting base plate 3, and several fixing seats 4.

[0049] Among them, the number of the horizontally polarized antennas 1 and the vertically polarized antennas 2 is not limited to three groups, and can be adjusted according to actual needs.

[0050] The mounting base plate 3 is located at the bottom. The horizontally polarized antennas 1 are vertically installed on the mounting base plate 3. The vertically polarized antennas 2 are horizontal with the mounting base plate 3. One end is fixed to the mounting base plate 3 through the fixing seats 4, and the other end is fixed to the second dielectric substrate 122 of the horizontally polarized antennas 1.

[0051] As shown in Figure 3 and 4 , the horizontally polarized antenna 1 operates in the frequency band f1, and the wavelength of the electromagnetic wave corresponding to the operating frequency f1 is λ1. The horizontally polarized antenna 1 is composed of a horizontally polarized radiation arm 11, a first dielectric substrate 121, a second dielectric substrate 122, and a horizontal feeding network 13.

[0052] The height of the first dielectric substrate 121 is H1 + H2, and the height of the second dielectric substrate 122 is H2.

[0053] The horizontal feeding network 13 is printed on the left side of the first dielectric substrate 121, and the horizontally polarized radiation arm 11 is printed on the right side of the first dielectric substrate 121.

[0054] To achieve a compact structure of the antenna, the horizontal feeding network 13, the first dielectric substrate 121, the horizontally polarized radiation arms 11, the second dielectric substrate 122, and the vertical feeding network 24 are arranged from left to right to form a multilayer printed circuit board.

[0055] As a detailed description, during processing, the horizontal feeding network 13 and the horizontally polarized radiation arms 11 are processed on both sides of the first dielectric substrate 121, and the vertical feeding network 24 is processed on the right side of the second dielectric substrate 122. Then, the first dielectric substrate 121 and the second dielectric substrate 122 are laminated together through a printed circuit board lamination process. Both the printed circuit board pattern processing and the two-layer board lamination process are common processes in printed circuit board processing.

[0056] The horizontally polarized radiation arms 11 are composed of four T-shaped metal sheets 113 above and metal connecting sheets 112.

[0057] The height of the T-shaped metal sheet 113 is H1 and the length is ls1. Usually, H1 and ls1 are taken as 0.25λ1.

[0058] A vertical coupling slit 111 is etched in the center of the T-shaped metal sheet 113.

[0059] As shown in the Figure 4 attachment, the distance between the four T-shaped metal sheets 113 is dx1, and usually dx1 is 0.7λ1.

[0060] As shown in the Figure 2 attachment, the distance between two adjacent horizontally polarized antennas 1 is dy.

[0061] The horizontal feeding network 13 is composed of a T-shaped power divider 131, a left transmission line 132, a right transmission line 133, and a first feeder line 134.

[0062] As shown in the Figure 4 attachment, the bottom lengths of the left transmission line 132 and the right transmission line 133 are lf1 and lf2 respectively. The difference between lf2 and lf1 is 0.5λ1. Above the left transmission line 132 and the right transmission line 133 is a "Π" shape and is located directly below the coupling slit 111 of the horizontally polarized radiation arms 11, playing a role in exciting the radiation of the horizontally polarized radiation arms 11.

[0063] As a detailed description, by adjusting the length of the end of the horizontal feeding network 13, a better impedance matching of the horizontally polarized antenna can be achieved.

[0064] The graphic widths of the vertical parts of the left transmission line 132, the right transmission line 133, and the T-shaped power divider 131 are set to the widths corresponding to a microstrip line impedance of 50Ω. The width of the horizontal part of the T-shaped power divider 131 is set to the width corresponding to a microstrip line impedance of 70.7Ω, and the horizontal part length is set to 0.5λ1.

[0065] The first feeder 134 includes an outer sheath 51 and an inner conductor 52 disposed within the outer sheath 51. The outer sheath 51 in the first feeder 134 is fixedly welded to the bottom of the metal connecting piece 112, and the inner conductor 52 in the first feeder 134 is fixedly welded to the bottom of the T-shaped power divider 131.

[0066] The vertical feeding network 24 is printed on the right side of the second dielectric substrate 122, and a first avoidance hole 23 is provided on the multilayer printed circuit board.

[0067] Mounting holes 41 are also machined on both sides of the multilayer printed circuit board for connection to the fixed seat 4.

[0068] As shown in the Figure 5 accompanying figure, the vertical polarization antenna 2 operates in the frequency band f2, and the electromagnetic wave wavelength corresponding to the operating frequency f2 is λ2.

[0069] The vertical polarization antenna 2 is composed of a radiation slot 21 etched on the carrier metal plate 27, a probe 22, and a vertical feeding network 24.

[0070] Each group of vertical polarization antennas is composed of three radiation slots 21. The radiation slot 21 is in an "H" shape. The horizontal length of the radiation slot 21 is ls2, and the vertical lengths on both sides are ls3. Usually, ls2 + ls3 is 0.5λ2.

[0071] As shown in the Figure 5 accompanying figure, the spacing between adjacent radiation slots 21 is dx2, usually dx2 is 0.7λ2, and the width of the vertical polarization antenna 2 is dy.

[0072] As a detailed description, the probe 22 is located directly below the center of the radiation slot 21, and functions to excite the radiation of the radiation slot 21. By adjusting the length of the probe 22 and the distance between the probe 22 and the radiation slot 21, the vertical polarization antenna 2 can obtain better impedance matching.

[0073] As a preferred solution, the probe 22 is a metal copper rod structure with a boss structure at the bottom, that is, a boss base 25. When the probe 22 is installed, the probe 22 passes through the first avoidance hole 23, and the boss base 25 presses on the left side of the first dielectric substrate 121.

[0074] As a detailed description, the diameter of the first avoidance hole 23 on the first dielectric substrate 121 and the second dielectric substrate 122 is the same as the diameter of the feeding probe 22 of the linear polarization antenna. Among them, the diameter of the first avoidance hole 23 on the metal connecting piece 112 is larger than the first avoidance hole 23 on the first dielectric substrate 121 and the second dielectric substrate 122, to prevent the probe 22 from being connected to the metal connecting piece 112.

[0075] Further, after the probe 22 passes through the first avoidance hole 23, it needs to be welded to the end of the vertical feeding network 24 to ensure the electrical connection between the feeding probe 22 and the vertical feeding network 24.

[0076] The vertical feeding network 24 The vertical feeding network 24 includes a second feeding wire 241 and a one-to-three microstrip line power divider 242. The three ends of the one-to-three microstrip line power divider 242 are respectively welded and fixed to the surfaces of the three probes 22.

[0077] Specifically, each second feeding wire 241 includes an outer skin 51 and an inner conductor 52 arranged in the outer skin 51. The inner conductor 52 in the second feeding wire 241 is welded and fixed to the bottom of the one-to-three microstrip line power divider 242.

[0078] As a preferred solution, as shown in the appendix Figure 8 is a schematic diagram of the mounting base plate 3. The mounting base plate 3 is processed with a second avoidance hole 53. The position of the dotted line in the figure is the position for mounting the multi-layer printed circuit board.

[0079] When assembling the antenna, first fix the fixing seat 4 on the mounting base plate 3, then vertically mount the multi-layer printed circuit board on the mounting base plate 3 and fix it to the side of the fixing seat 4, and then mount the vertical polarization antenna 2 on the upper side. One side of the vertical polarization antenna 2 is fixed to the fixing seat through the mounting hole 41, and the other side is placed on the upper side of the second dielectric substrate 122, and curing glue is applied on the contact surface for reinforcement to enhance the structural strength.

[0080] As a preferred solution, the performance results of the reflection coefficient and isolation of the dual-polarization port are as shown in the appendix Figure 9 As shown. The horizontal polarization operates at the frequency f1, and the vertical polarization operates at the frequency f2. Within the required operating bandwidth, the reflection coefficient is less than -15 dB, and the isolation between the two polarizations is less than -35 dB, and the isolation performance is excellent.

[0081] In addition, f1 and f2 can be designed according to the frequency band requirements of specific applications. f1 and f2 can be either a dual-frequency antenna with a small frequency ratio where the frequency bands are very close, or a dual-frequency antenna with a large frequency ratio. And when adjusting one of the frequency bands, it does not affect the arrangement and performance of the other frequency band.

[0082] The radiation pattern performance of the antenna is excellent as shown in the appendix Figure 10 and in the appendix Figure 11 as shown.

[0083] The dual-band and dual-polarized antenna of this embodiment has the advantages of simple structure and low processing cost, and can meet the requirements of applications such as multi-functional radars and wireless communications. In this embodiment, the horizontally polarized antenna is driven by a one-to-two power divider, and the vertically polarized antenna is driven by a one-to-three driver. Modifying the one-to-two and one-to-three to other one-to-multiple-port drivers for the antenna, or a larger-scale array antenna composed of the dual-band and dual-polarized antenna provided by the present invention, is also within the protection scope of the present invention.

[0084] Embodiment 2

[0085] The difference between this embodiment and the previous embodiment is that: in Embodiment 1, the spacing between each group of horizontally polarized antennas and each group of vertically polarized antennas is dy. In this embodiment, the spacing between each group of horizontally polarized antennas is dy, and the spacing between each group of vertically polarized antennas is 2*dy.

[0086] As shown in the attached Figure 12 and the attached Figure 13 As shown, a group of horizontally polarized antennas is added above the vertically polarized antenna 2. A single-layer dielectric plate 123 is used. Similarly, the horizontal feeding network 13 and the horizontally polarized radiation arms 11 are processed on both sides of the single-layer dielectric plate 123. The horizontally polarized single-layer dielectric plate 123 is installed on the center line of the vertically polarized antenna 2 through an L-shaped upper fixing bracket 42. The radiation slot 21 is not on the center line but in the middle of the multi-layer dielectric plate and the single-layer dielectric plate 123.

[0087] The remaining designs of Embodiment 2 are similar to those of Embodiment 1, and Embodiment 2 is suitable for application scenarios where the frequency ratio of the dual-band antenna is larger and the vertical polarization frequency is lower.

Claims

1. A dual-band and dual-polarized antenna integrated with a feeding network, characterized in that: It includes a horizontally polarized antenna (1), a vertically polarized antenna (2), and a mounting base plate (3); The horizontally polarized antenna (1) is vertically mounted on the top of the mounting base plate (3) through a fixing seat (4). The vertically polarized antenna (2) is arranged parallel to the mounting base plate (3). One side of the bottom of the vertically polarized antenna (2) is fixedly mounted on the mounting base plate (3) through a fixing seat (4), and the other side of the bottom of the vertically polarized antenna (2) is fixedly mounted on the horizontally polarized antenna (1); The horizontally polarized antenna (1) includes a horizontally polarized radiation arm (11), a first dielectric substrate (121), a second dielectric substrate (122), and a horizontal feeding network (13). The horizontally polarized radiation arm (11) is printed on one side of the first dielectric substrate (121) close to the second dielectric substrate (122), and the horizontal feeding network (13) is printed on the side of the first dielectric substrate (121) away from the horizontally polarized radiation arm (11); The other side of the bottom of the vertically polarized antenna (2) is fixedly mounted on the top of the second dielectric substrate (122); The horizontally polarized radiation arm (11) includes a metal connecting piece (112) and four T-shaped metal pieces (113) arranged on the metal connecting piece (112). The four T-shaped metal pieces (113) are evenly spaced on the metal connecting piece (112), and a coupling slit (111) is etched in the middle of the top of the T-shaped metal piece (113); The horizontal feeding network (13) includes a first feeding wire (134), a T-shaped power divider (131), a left transmission line (132), and a right transmission line (133). The two ends of the T-shaped power divider (131) are respectively connected to the left transmission line (132) and the right transmission line (133). The upper parts of the left transmission line (132) and the right transmission line (133) are in a "Π" shape and are directly below the coupling slit (111); The vertically polarized antenna (2) includes a vertical feeding network (24), a carrier metal plate (27), and three probes (22). The vertical feeding network (24) is printed on the side of the second dielectric substrate (122) away from the horizontally polarized radiation arm (11). Three radiation slits (21) are formed in the top of the carrier metal plate (27). The radiation slits (21) are arranged in an "H" shape. The three probes (22) are respectively arranged below the three radiation slits (21), and the probes (22) penetrate through the horizontally polarized antenna (1); 2. The dual-band and dual-polarized antenna with an integrated feeding network according to claim 1, wherein: The vertical feeding network (24) includes a second feeding wire (241) and a one-to-three microstrip line power divider (242). The three ends of the one-to-three microstrip line power divider (242) are respectively welded and fixed to the surfaces of the three probes (22); 3. The dual-band and dual-polarized antenna with an integrated feeding network according to claim 2, characterized in that: Both the first feeding wire (134) and the second feeding wire (241) include an outer skin (51) and an inner conductor (52) arranged in the outer skin (51); The outer skin (51) in the first feeder line (134) is fixedly welded to the bottom of the metal connecting piece (112), and the inner conductor (52) in the first feeder line (134) is fixedly welded to the bottom of the T-shaped power divider (131); The inner conductor (52) in the second feeder line (241) is fixedly welded to the bottom of the one-to-three microstrip line power divider (242).

4. The dual-band and dual-polarization antenna with an integrated feeding network according to claim 1, characterized in that: The surfaces of the first dielectric substrate (121), the second dielectric substrate (122), and the metal connecting piece (112) are all provided with first avoidance holes (23) adapted to the probe (22), and the diameter of the first avoidance hole (23) opened on the metal connecting piece (112) is larger than the diameter of the first avoidance hole (23) opened on the first dielectric substrate (121) and the second dielectric substrate (122). One end of the probe (22) is fixedly connected with a boss base (25); The top of the mounting base plate (3) is provided with second avoidance holes (53) adapted to the first feeder line (134) and the second feeder line (241); One side of the bearing metal plate (27) is provided with a third avoidance hole (26) adapted to the first feeder line (134); The surfaces of the fixing seat (4) and the horizontal polarization antenna (1) are both provided with mounting holes (41).

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