CN115548704A - 5G common-caliber high-gain vehicle-mounted base station antenna based on special frequency band - Google Patents

5G common-caliber high-gain vehicle-mounted base station antenna based on special frequency band Download PDF

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Publication number
CN115548704A
CN115548704A CN202211178752.8A CN202211178752A CN115548704A CN 115548704 A CN115548704 A CN 115548704A CN 202211178752 A CN202211178752 A CN 202211178752A CN 115548704 A CN115548704 A CN 115548704A
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China
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frequency
arm
antenna
bottom plate
frequency antenna
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CN202211178752.8A
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Chinese (zh)
Inventor
刘俊博
马阳
张海
许书彬
袁宏伟
刘为
田金凤
秦川
汤霄
王琛
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CETC 54 Research Institute
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CETC 54 Research Institute
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Priority to CN202211178752.8A priority Critical patent/CN115548704A/en
Publication of CN115548704A publication Critical patent/CN115548704A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • 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
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • 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
    • 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

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  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

The invention discloses a special frequency band-based 5G common-caliber high-gain vehicle-mounted base station antenna, belonging to the technical field of antennas; the antenna comprises a low-frequency antenna unit, a high-frequency antenna unit and a bottom plate, wherein flanges are arranged on two opposite sides of the bottom plate, and the low-frequency antenna unit comprises a radiation arm and a connecting ring; the radiation arm is of a T-shaped structure and comprises a cross arm and an inclined arm; the 4 radiation arms are arrayed by taking the connecting ring as a circle center, wherein the cross arms are all positioned on the same plane, one end of each inclined arm is connected to the middle position of each cross arm, and the other end of each inclined arm is connected to the connecting ring; the connecting ring is also provided with a coaxial structure. The antenna arrays of different working frequency bands are arranged on the same antenna array surface together, so that the purposes of reducing size and weight, saving cost and facilitating installation are achieved.

Description

5G common-caliber high-gain vehicle-mounted base station antenna based on special frequency band
Technical Field
The invention relates to the technical field of antennas, in particular to a 5G common-caliber high-gain vehicle-mounted base station antenna based on a special frequency band.
Background
As one of the greatest scientific and technological achievements of the human being in the 20 th century, mobile communication has attracted much attention and research in recent years due to its rapid development and liveliness. With the growing proliferation of the mobile communication market, mobile communication technology has undergone many generations of changes to meet the market demand. Initially, the first generation mobile communication (analog communication system) was used for basic call needs and the number of users was small, but the analog communication system had a small network capacity and insufficient security. Since more and more people are enjoying the convenience of long-distance wireless communication, the demand for network capacity is also increased, and digital communication systems are favored because of their advantages of good voice quality, high security, and high spectral efficiency. After the 21 st century, the mobile communication functions were not just basic telephony capabilities, but began to support data services. In 2012, the mobile internet is rapidly developed, and mobile users are pursuing high-speed experience of mobile terminals comparable to home broadband. The development of the emerging industries such as internet of things and unmanned driving to date promotes the development of mobile communication towards high speed, high reliability and low time delay. From a first-generation analog communication system (1G), a second-generation digital communication system (2G), a third-generation mobile communication system (3G), a fourth-generation mobile communication system (4G) to a fifth-generation mobile communication system (5G) under development, there is no way to adapt to the increasing user demands.
One of the components in the mobile communication system is the base station antenna, and the high requirements in the new communication era do not depart from the optimization and innovation of the base station antenna, so the base station antenna is also being upgraded continuously to adapt to the increasing communication requirements. The base station antenna is an electromagnetic transceiving pivot in a mobile communication system, and the performance of the base station antenna is directly decisive to the whole communication system.
Under the current complex mobile communication environment, the base station signal received by the user terminal fluctuates and changes due to path loss, shadow effect and multipath fading, especially multipath reception, which can cause signal amplitude fading, time delay expansion and Doppler spectrum expansion causing the signal to generate bit error rate, and for better signal quality, the improvement of antenna hardware gain needs to be considered; meanwhile, in the process of erecting the base station, the antenna is usually fixed in position, the height of an antenna mast is 15m-20m, different operators and different organizations often need to carry a plurality of antennas with different frequency bands on the same antenna tower, so that the shortage of sky resources is caused, and the installation cost and the site selection difficulty of the whole base station are further improved; and finally, under a specific application environment, the antenna working below 1GHz has a larger external structure, is not suitable for mobile arrangement and installation of a base station system, and needs to be optimized in consideration of the size and weight if the antenna needs to be installed on mobile equipment such as vehicles.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a special frequency band-based 5G common-caliber high-gain vehicle-mounted base station antenna; the antenna arrays of different working frequency bands are arranged on the same antenna array surface together, so that the purposes of reducing size and weight, saving cost and facilitating installation are achieved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
A5G common-caliber high-gain vehicle-mounted base station antenna based on a special frequency band comprises a low-frequency antenna unit and a high-frequency antenna unit; the device also comprises a bottom plate; two opposite sides of the bottom plate are provided with flanges, and the flanges are vertical to the upper surface of the bottom plate; the low-frequency antenna unit and the high-frequency antenna unit are arranged on the upper surface of the bottom plate, the number of the high-frequency units is multiple, and the high-frequency units are arranged along the extending direction of the flanging; the high-frequency antenna unit is positioned on the inner side of one of the flanges;
the low-frequency antenna unit comprises a radiation arm and a connecting ring; the radiation arm is of a T-shaped structure and comprises a cross arm and an inclined arm; the 4 radiation arms are arrayed by taking the connecting ring as a circle center, wherein the cross arms are all positioned on the same plane, one end of each inclined arm is connected to the middle position of each cross arm, and the other end of each inclined arm is connected to the connecting ring; the connecting ring of the low-frequency antenna unit is tightly attached to the bottom plate; the radiating arm is also provided with a radiating arm gap for increasing the length of the antenna current path;
the connecting ring is also provided with a coaxial structure which comprises an inner core, a dielectric layer and an outer conductor; the inner core is positioned on a central shaft of the medium layer, and the medium layer penetrates through the connecting ring and the bottom plate; the outer conductor is connected to the connecting ring and exposed out of the lower surface of the bottom plate.
Furthermore, the two low-frequency antenna units are arranged, and the connecting line of the two low-frequency antenna units is parallel to the flanges at the two sides of the bottom plate; the high-frequency antenna units are arranged in two groups, and each group of high-frequency antenna units are located between the flanging and the low-frequency unit.
Further, the angle between the tilting arm and the connection ring has a value between 40 ° and 50 °.
Furthermore, the low-frequency antenna unit further comprises a support arm, the bottom end of the support arm is fixed on the bottom plate, and the top end of the support arm is connected with the radiation arm.
Further, the high-frequency antenna unit comprises a radiation sheet, a connecting sheet and a coaxial feeder line; the number of the radiation sheets is 4, and the radiation sheets are all positioned on the same plane; the radiation sheet is of a square structure; the inner ends of two adjacent radiating fins are connected with a coaxial feeder line; the outer conductor of the coaxial feeder line is connected with the radiating sheet and the bottom plate, the inner conductor of the coaxial feeder line is connected with the radiating sheet on the opposite side of the coaxial feeder line through the connecting sheet, and the inner conductor and the outer conductor of the coaxial feeder line are exposed out of the lower surface of the bottom plate.
Furthermore, the high-frequency antenna unit comprises a supporting platform, the supporting platform is located on the upper surface of the bottom plate, and the radiation sheet is located on the supporting platform.
Furthermore, the radiation sheet is also provided with a lightening hole and an L-shaped lightening groove.
Further, the two connecting sheets are crossed and have no contact.
Furthermore, the height of the flange at the high-frequency antenna unit is lower than that of the flange at the opposite side.
The invention adopts the technical scheme to produce the beneficial effects that:
the antenna arrays of different frequency bands are arranged in the same antenna reflection bottom plate through certain adjustment, compared with the antenna arrays of different frequency bands which are separately arranged and respectively comprise the antenna housing, the size of the antenna array is obviously reduced, and the antenna array has the characteristics of low size and easiness in installation; by reducing the installation size of the antenna bottom plate and carrying out a series of processing such as punching, corner cutting and the like on the high-frequency antenna unit under the condition of not influencing the performance greatly, the overall weight of the antenna is effectively reduced; under the condition that the size of the low-frequency antenna is large, the low-frequency unit is designed in a bowl-shaped antenna structure mode, high gain is guaranteed to be obtained under the condition of the same size, and the overall performance of a base station system is improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a high-frequency antenna unit according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a low-frequency antenna unit according to an embodiment of the present invention.
Fig. 4 shows a standing wave ratio of the high-frequency antenna unit according to the embodiment of the invention.
Fig. 5 is a gain pattern of the high frequency antenna unit according to an embodiment of the present invention.
Fig. 6 is a standing-wave ratio diagram of the low-frequency antenna unit according to the embodiment of the invention.
Fig. 7 is a gain pattern of a low frequency antenna unit according to an embodiment of the present invention.
Fig. 8 is a gain pattern of a common-aperture high-frequency antenna array according to an embodiment of the present invention.
In the figure: 1. the antenna comprises a bottom plate, 1-2 parts of a right flanging, 1-3 parts of a left flanging, 2 parts of a high-frequency antenna unit, 3 parts of a low-frequency antenna unit, 2-1 parts of a radiating sheet, 2-2 parts of an L-shaped weight reduction groove; 2-3 parts of a coaxial feeder line, 2-4 parts of a connecting sheet, 2-5 parts of a lightening hole; 2-6, a support table; 3-1, a radiation arm; 3-2, connecting rings; 3-3 and a support arm.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
A5G common-caliber high-gain vehicle-mounted base station antenna based on a special frequency band comprises a low-frequency antenna unit and a high-frequency antenna unit; the device also comprises a bottom plate; two opposite sides of the bottom plate are provided with flanges, and the flanges are vertical to the upper surface of the bottom plate; the low-frequency antenna unit and the high-frequency antenna unit are arranged on the upper surface of the bottom plate, the number of the high-frequency units is multiple, and the high-frequency units are arranged along the extending direction of the flanging; the high-frequency antenna unit is positioned on the inner side of one of the flanges;
the low-frequency antenna unit comprises a radiation arm and a connecting ring; the radiation arm is of a T-shaped structure and comprises a cross arm and an inclined arm; the 4 radiation arms are arrayed by taking the connecting ring as a circle center, wherein the cross arms are all positioned on the same plane, one end of each inclined arm is connected to the middle position of each cross arm, and the other end of each inclined arm is connected to the connecting ring; the connecting ring of the low-frequency antenna unit is tightly attached to the bottom plate; the radiating arm is also provided with a radiating arm gap for increasing the length of the antenna current path;
the connecting ring is also provided with a coaxial structure which comprises an inner core, a dielectric layer and an outer conductor; the inner core is positioned on a central shaft of the medium layer, and the medium layer penetrates through the connecting ring and the bottom plate; the outer conductor is connected to the connection ring and exposed out of the lower surface of the bottom plate.
Furthermore, two low-frequency antenna units are arranged, and the connecting line of the two low-frequency antenna units is parallel to the flanges on the two sides of the bottom plate; the high-frequency antenna units are arranged in two groups, and each group of high-frequency antenna units are located between the flanging and the low-frequency unit.
Further, the included angle between the inclined arm and the connecting ring is XX DEG
Furthermore, the low-frequency antenna unit further comprises a support arm, the bottom end of the support arm is fixed on the bottom plate, and the top end of the support arm is connected with the radiation arm.
Further, the high-frequency antenna unit comprises a radiation sheet, a connecting sheet and a coaxial feeder line; 4 radiation sheets are arranged and are positioned on the same plane; the radiation sheet is of a square structure; the inner ends of two adjacent radiating sheets are connected with a coaxial feeder line; the outer conductor of the coaxial feeder line is connected with the radiating sheet and the bottom plate, the inner conductor of the coaxial feeder line is connected with the radiating sheet on the opposite side of the coaxial feeder line through the connecting sheet, and the inner conductor and the outer conductor of the coaxial feeder line are exposed out of the lower surface of the bottom plate.
Furthermore, the high-frequency antenna unit comprises a supporting platform, the supporting platform is located on the upper surface of the bottom plate, and the radiation sheet is located on the supporting platform.
Furthermore, a lightening hole and an L-shaped lightening groove are further formed in the radiating sheet.
Further, the two connecting sheets are crossed without contact.
Further, the height of the flange at the high-frequency antenna unit is lower than that of the flange at the opposite side.
The following is a more specific example:
referring to fig. 1 to 3, the present embodiment includes a high frequency antenna array, a low frequency antenna, a bottom plate, a structural fixing member, a coaxial feed line and an antenna housing.
Two columns of high-frequency antenna arrays are vertically arranged, the interval of units in the array is different from the interval between the arrays, each column of high-frequency antenna arrays can be connected with two radio-frequency channels, the high-frequency antenna arrays have four radio-frequency channel ports, and the different channels are distinguished from the arrays by the polarization mode of the antenna units; the low-frequency antenna comprises two antenna low-frequency units in total, the unit interval is greater than the array interval, two radio-frequency ports with different polarizations are led out from each low-frequency unit, the low-frequency antenna array shares four radio-frequency channel ports, the different channels are distinguished from the low-frequency unit by means of the polarization mode of the antenna unit, and the low-frequency antenna array and the high-frequency antenna array have a certain interval; in the direction of the antenna array, flanges are arranged on two sides of the reflecting floor, the antenna and the reflecting floor are fixed by screw punching, the low-frequency antenna unit is additionally provided with a structural fixing part to be connected with the reflecting floor, and the floor is punched to ensure that the coaxial feeder penetrates through and is connected with a feed point.
The connection position of the feed point of the coaxial feeder of the high-frequency antenna unit is arranged on the plane where the radiation sheet is located; the feed connection position of the coaxial structure of the low-frequency antenna unit is positioned at the bottom of the unit, and the coaxial feeder lines of the same polarized oscillators in the same unit are subjected to power division treatment.
Referring to fig. 1-3, fig. 1 is an overall schematic diagram of an antenna array of the present invention, fig. 2 is a schematic diagram of a high-frequency antenna unit of the present invention, and fig. 3 is a schematic diagram of a low-frequency unit of the present invention. A single array of the 4.9G antenna array only comprises a + 45-degree polarization unit and a-45-degree polarization unit; the wavelength lambda of the 600M antenna in free space is 500mm, the overall size of the antenna array is large, and the antenna array is not beneficial to moving, mounting and erecting, so that the 600M antenna array unit adopts a bowl-shaped structure, one antenna array contains 2 + 45-degree polarization units and 2-45-degree polarization units, and under the condition that the overall size is not increased much, higher antenna radiation gain is obtained.
Fig. 1 is a schematic diagram of the antenna array of the present invention, which includes 2 groups of low-frequency antenna arrays and 2 groups of high-frequency antenna arrays, wherein the high-frequency antenna arrays and the low-frequency antenna arrays respectively have four radio frequency channels; the antenna arrays are arranged up and down, and each row of antenna arrays corresponds to two radio frequency channels; the low frequency antenna array is arranged in the middle of the reflecting plate, each array has one array, the high frequency antenna array is arranged on one side of the reflecting plate, and each array has eight arraysThe array is composed of a plurality of array elements, and simultaneously, in order to prevent the mutual interference between different frequency bands, the units of different frequency bands keep larger spacing, and the axis spacing is d 1 =210mm; to ensure HPBW 3dB The gain is improved while the requirement is met (3 dB lobe width), the left flange and the right flange are additionally arranged on the left side and the right side of the bottom plate respectively, the height of the reflecting plate is reduced at the high-frequency antenna array, the reflecting plate is matched with the size and the wavelength of a high-frequency unit, the wave beam convergence effect is enhanced, and the gain is effectively improved. According to the design, the antenna arrays are arranged in a common caliber mode on the premise that antennas in different frequency bands are not interfered with each other, and the space environment is saved.
As can be seen from FIG. 2, the high-frequency metal die-casting radiation unit mainly comprises a radiation sheet, a support table and a connecting sheet, wherein at the frequency band of 4.9G, λ =61.2mm, the length of the radiation sheet is about 1/4 λ, the height of the radiation sheet from the reflection floor is about 1/4 λ, and the length l of the radiation sheet is optimized subsequently 1 =11.5mm. Meanwhile, the surface of the metal die-casting radiating unit is punched and subjected to corner cutting, the weight of the antenna is reduced as much as possible on the premise that the performance of the antenna unit is not affected, and finally, a coaxial balun structure is adopted for feeding, so that the current balance of the antenna unit is ensured, and the feeder line is a 75-ohm coaxial feeder line and is better matched with the radiating unit.
As can be seen from FIG. 3, the low-frequency radiation unit also adopts the single radiation arm as 1/4 lambda first, and the radiation arm length l is obtained after subsequent optimization 2 =216mm, and meanwhile, the distance between the axes of the two co-polarized oscillators in a single unit is about 1/4 lambda, and array sub-arm loop processing is subsequently performed on a half-wave dipole unit under a 600MHz frequency band, so that a current path is extended, and the antenna gain is improved. The feed structure adopts coplanar waveguide feed instead of the traditional long coaxial line feed mode to achieve the purpose of reducing the antenna loss, and finally the width w of the coplanar waveguide feed line 1 And =2mm, the feeder line uses a 75-ohm coaxial feeder line, and the same polarization unit is connected by using a power divider.
Referring to fig. 4-8, schematic diagrams of various performances of the antenna array and antenna unit of the present invention can be obtained. Fig. 4 is a schematic diagram of a standing-wave ratio of a high-frequency antenna unit of the present invention, fig. 5 is a gain directional diagram of a high-frequency antenna unit of the present invention, fig. 6 is a schematic diagram of a standing-wave ratio of a low-frequency antenna unit of the present invention, fig. 7 is a gain directional diagram of a high-frequency antenna unit of the present invention, and fig. 8 is a high-frequency antenna array directional diagram of an antenna array of the present invention.
As can be seen from FIG. 4, the standing wave ratio of the +/-45 DEG double ports of the high-frequency radiating unit is less than 1.5 in the frequency band of 4.2GHz-5.2GHz, wherein the standing wave ratio is less than 1.3 in the main working frequency band of 4.8GHz-5.0GHz, and the requirement of the working frequency band of the high-frequency antenna unit is met. As can be seen from the radiation pattern of the high-frequency unit in FIG. 5, the main lobe direction of the high-frequency unit is 0 deg., the maximum radiation direction gain is 8.3dBi, and the 3dB beam width HPBW 3dB Is 65 deg..
As can be seen from fig. 5, the ± 45 ° dual ports of the low frequency antenna unit have a standing-wave ratio of less than 1.5 in the frequency band of 547MHz to 689MHz, and a standing-wave ratio of less than 1.3 in the frequency band of 558MHz to 679MHz, which meets the requirement of setting the operating frequency band of the low frequency antenna unit. As can be seen from the radiation pattern of the low-frequency unit in FIG. 6, the main lobe direction of the low-frequency unit is 0 °, and the maximum radiation direction gain, i.e., the single-array gain of the antenna, is 10dBi, and 3dB beam width HPBW 3dB The angle is 65 degrees, the design requirement of the base station antenna is met, and the gain is improved under the same area.
FIG. 8 shows a dedicated band 5G common-aperture high-gain antenna array directional diagram of the present invention, in which the main lobe direction of an eight-unit high-frequency antenna array is 0 DEG, the gain in the maximum radiation direction is 17.7dBi, and the vertical direction has a 3dB beam width HPBW 3dB 8.5 DEG, and a 3dB beam width HPBW in the horizontal direction 3dB Is 63 degrees.
In summary of the above description of implementations and approaches relating to the present invention, the present invention has the following advantages: firstly, the antenna arrays of different frequency bands are arranged in the same antenna reflection bottom plate through certain adjustment, compared with the antenna arrays of different frequency bands which are separately arranged and respectively comprise the antenna housing, the size is obviously reduced, and the antenna array has the characteristics of low size and easiness in installation; secondly, by reducing the installation size of the antenna bottom plate and carrying out a series of processing such as punching, corner cutting and the like on the high-frequency antenna unit under the condition of not affecting the performance greatly, the overall weight of the antenna is effectively reduced; thirdly, under the condition that the size of the low-frequency antenna is large, the low-frequency unit is designed in a bowl-shaped antenna structure mode, high gain is guaranteed to be obtained under the condition of the same size, and the overall performance of a base station system is improved.

Claims (9)

1. A5G common-caliber high-gain vehicle-mounted base station antenna based on a special frequency band comprises a low-frequency antenna unit and a high-frequency antenna unit; the device is characterized by also comprising a bottom plate; two opposite sides of the bottom plate are provided with flanges, and the flanges are vertical to the upper surface of the bottom plate; the low-frequency antenna units and the high-frequency antenna units are arranged on the upper surface of the bottom plate, the number of the high-frequency units is multiple, and the high-frequency units are arranged along the extending direction of the turned-over edge; the high-frequency antenna unit is positioned on the inner side of one of the flanges;
the low-frequency antenna unit comprises a radiation arm and a connecting ring; the radiation arm is of a T-shaped structure and comprises a cross arm and an inclined arm; the 4 radiation arms are arrayed by taking the connecting ring as a circle center, wherein the cross arms are all positioned on the same plane, one end of each inclined arm is connected to the middle position of each cross arm, and the other end of each inclined arm is connected to the connecting ring; the connecting ring of the low-frequency antenna unit is tightly attached to the bottom plate; the radiating arm is also provided with a radiating arm gap for increasing the length of an antenna current path;
the connecting ring is also provided with a coaxial structure which comprises an inner core, a dielectric layer and an outer conductor; the inner core is positioned on a central shaft of the medium layer, and the medium layer penetrates through the connecting ring and the bottom plate; the outer conductor is connected to the connection ring and exposed out of the lower surface of the bottom plate.
2. The special frequency band-based 5G common-caliber high-gain vehicle-mounted base station antenna is characterized in that the number of the low-frequency antenna units is two, and a connecting line of the two low-frequency antenna units is parallel to the flanges on the two sides of the bottom plate; the high-frequency antenna units are arranged in two groups, and each group of high-frequency antenna units is located between the turned-over edge and the low-frequency unit.
3. The antenna of claim 1, wherein an angle between the tilt arm and the connection ring is 40 ° to 50 °.
4. The special frequency band-based 5G common-caliber high-gain vehicle-mounted base station antenna as claimed in claim 1, wherein the low-frequency antenna unit further comprises a support arm, the bottom end of the support arm is fixed on the bottom plate, and the top end of the support arm is connected with the radiation arm.
5. The special frequency band-based 5G common-caliber high-gain vehicle-mounted base station antenna is characterized in that the high-frequency antenna unit comprises a radiation piece, a connecting piece and a coaxial feeder line; 4 radiation sheets are arranged and are positioned on the same plane; the radiation sheet is of a square structure; the inner ends of two adjacent radiating sheets are connected with a coaxial feeder line; the outer conductor of the coaxial feeder line is connected with the radiating sheet and the bottom plate, the inner conductor of the coaxial feeder line is connected with the radiating sheet on the opposite side of the coaxial feeder line through the connecting sheet, and the inner conductor and the outer conductor of the coaxial feeder line are exposed out of the lower surface of the bottom plate.
6. The antenna of claim 5, wherein the high-frequency antenna unit comprises a support, the support is located on the upper surface of the base plate, and the radiation sheet is located on the support.
7. The special frequency band-based 5G common-caliber high-gain vehicle-mounted base station antenna as claimed in claim 5, wherein the radiating plate is further provided with a lightening hole and an L-shaped lightening slot.
8. The special frequency band-based 5G common-caliber high-gain vehicle-mounted base station antenna is characterized in that two connecting sheets are crossed and have no contact.
9. The special frequency band-based 5G common-caliber high-gain vehicle-mounted base station antenna is characterized in that the height of a flanging at the high-frequency antenna unit is lower than that of the flanging at the opposite side.
CN202211178752.8A 2022-09-27 2022-09-27 5G common-caliber high-gain vehicle-mounted base station antenna based on special frequency band Pending CN115548704A (en)

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CN202211178752.8A CN115548704A (en) 2022-09-27 2022-09-27 5G common-caliber high-gain vehicle-mounted base station antenna based on special frequency band

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CN202211178752.8A CN115548704A (en) 2022-09-27 2022-09-27 5G common-caliber high-gain vehicle-mounted base station antenna based on special frequency band

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CN115548704A true CN115548704A (en) 2022-12-30

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