CN112366443A - Low-profile broadband base station antenna based on super surface and communication equipment - Google Patents
Low-profile broadband base station antenna based on super surface and communication equipment Download PDFInfo
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- CN112366443A CN112366443A CN202011059485.3A CN202011059485A CN112366443A CN 112366443 A CN112366443 A CN 112366443A CN 202011059485 A CN202011059485 A CN 202011059485A CN 112366443 A CN112366443 A CN 112366443A
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- dielectric substrate
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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
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/364—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith using a particular conducting material, e.g. superconductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
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- 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
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
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- 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
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a low-profile broadband base station antenna based on a super surface and communication equipment, which comprise a dual-polarized planar dipole antenna and a super surface unit; the dual-polarized planar dipole antenna comprises antenna radiation units, parasitic units and a reflecting plate, wherein the antenna radiation units are arranged above the reflecting plate through supporting columns, the parasitic units are arranged between the reflecting plate and the antenna radiation units, and the super-surface units are located above the antenna radiation units. The antenna has the advantages of low profile, large bandwidth and stable radiation pattern.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a super-surface-based low-profile broadband base station antenna and communication equipment.
Background
The performance of the base station antenna as a core part of the mobile base station directly affects the quality of the whole communication system. With the continuous development of mobile communication technology, the complexity of communication systems is also increasing. Because of the long-term coexistence of multiple current mobile communication standards, the application space of the base station is tight, and the antenna technology of the base station is continuously developing towards the broadband and miniaturization.
According to the traditional base station antenna based on the reflecting plate, according to the mirror image principle, the dipole needs to be placed at a height of lambda/4 away from the reflecting plate to ensure the current consistency, so that good performance is obtained. The antenna with the profile height can lead the application space of the base station to be more tense at present, and does not accord with the development trend of miniaturization and low profile of the base station antenna.
The super-surface is a special electromagnetic material with periodicity, and the special electromagnetic property of the super-surface can reduce the profile height of the antenna. However, after the height of the base station antenna is reduced, the conventional super-surface structure still has great difficulty in maintaining the performances of the base station antenna, such as the coverage frequency range, high isolation, low cross polarization and the like.
Disclosure of Invention
In order to overcome the defects in the prior art, the primary object of the present invention is to provide a low-profile broadband base station antenna based on a super-surface, which utilizes the special electromagnetic characteristics of the super-surface to reduce the profile height of the antenna and maintain the original antenna performance, and which can realize 63% of impedance bandwidth and cover the frequency band of 1412-2716 MHz.
It is a secondary object of the present invention to provide a communication device.
The invention mainly aims to adopt the following technical scheme:
a low-profile broadband base station antenna based on a super surface comprises a dual-polarized planar dipole antenna and a super surface unit;
the dual-polarized planar dipole antenna comprises antenna radiation units, parasitic units and a reflecting plate, wherein the antenna radiation units are arranged above the reflecting plate through supporting columns, the parasitic units are arranged between the reflecting plate and the antenna radiation units, and the super-surface units are located above the antenna radiation units.
The antenna radiation unit comprises an antenna radiation medium substrate, a third radiation arm and a fourth radiation arm are arranged on the upper surface of the antenna radiation medium substrate, a first radiation arm and a second radiation arm are arranged on the lower surface of the antenna radiation medium substrate, the first radiation arm and the third radiation arm are centrosymmetric with respect to the antenna radiation medium substrate to form a + 45-degree polarization oscillator, and the second radiation arm and the fourth radiation arm are centrosymmetric with respect to the antenna radiation medium substrate to form a-45-degree polarization oscillator.
Preferably, the antenna further comprises a feeding structure, wherein the feeding structure comprises a first feeding line and a second feeding line, the first feeding line is printed on the lower surface of the antenna radiation medium substrate and feeds power to the + 45-degree polarized oscillator, and the second feeding line is printed on the upper surface of the antenna radiation medium substrate and feeds power to the-45-degree polarized oscillator.
The super-surface unit comprises a super-surface medium substrate, and rectangular patches distributed in an array are arranged on the upper surface of the super-surface medium substrate.
The first radiating arm, the second radiating arm, the third radiating arm and the fourth radiating arm are identical in structure and are hexagonal patches formed by two identical isosceles triangles and rectangles.
The hexagonal patch is provided with a horseshoe-shaped gap, and the opening direction of the horseshoe-shaped gap faces to the center of the antenna dielectric substrate.
The reflecting plate is in a non-closed metal surrounding edge type.
Preferably, the coaxial cable further comprises a coaxial line, and the coaxial line is respectively connected with the first feeder line and the second feeder line.
The first feeder line is perpendicular to the second feeder line, and the perpendicular intersection point is located at the center point of the antenna radiation medium substrate.
The secondary purpose of the invention is realized by adopting the following technical scheme:
a communication device comprising said low-profile broadband base station antenna.
The invention has the beneficial effects that:
(1) the bandwidth of the invention covers 1412-2716MHz, and is not only suitable for a 2G/3G/LTE (4G) system but also suitable for an IMT system.
(2) The radiating arm of the invention is provided with a horseshoe-shaped gap, and can effectively expand the frequency band.
(3) The antenna is arranged above the antenna by loading the super surface, so that the antenna is reduced in height, the excellent performance of the original antenna is kept, and the stable beam width and gain are realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is an elevational, cross-sectional view of the present invention;
FIG. 4 is a left side sectional view of the present invention;
FIG. 5 is a diagram of the structure of the antenna radiation unit of the present invention
FIG. 6 is an impedance bandwidth of a super-surface based low profile broadband base station antenna of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Example 1
As shown in fig. 1 to 5, a low-profile broadband base station antenna based on a super surface includes a dual-polarized planar dipole antenna and a super surface unit 2.
The dual-polarized planar dipole antenna comprises an antenna radiation unit 1, a parasitic unit 5, a feed structure, a coaxial line and a reflecting plate 3, wherein the antenna radiation unit is arranged above the reflecting plate through a support column, the distance between the antenna radiation unit and the reflecting plate is 19.5mm, and the support column is an insulating plastic column.
The antenna radiation unit comprises an antenna radiation dielectric substrate 7, a third radiation arm 5C and a fourth radiation arm 5D are arranged on the upper surface of the antenna radiation dielectric substrate, and the size of the antenna radiation dielectric substrate is 68 multiplied by 68mm2The lower surface of the antenna radiation medium substrate is provided with a first radiation arm 5A and a second radiation arm 5B, the first radiation arm 5A and the third radiation arm 5C are symmetrical about the center of the antenna radiation medium substrate to form a + 45-degree polarization oscillator, and the second radiation arm and the fourth radiation arm are symmetrical about the center of the antenna radiation medium substrate to form a-45-degree polarization oscillator.
The feed structure comprises a first feed line 6A and a second feed line 6B, the first feed line is arranged on the upper surface of the antenna radiation medium substrate and feeds electricity to the-45-degree polarized oscillator, the second feed line is arranged on the lower surface of the antenna radiation medium substrate and feeds electricity to the + 45-degree polarized oscillator, and the isolation degree of 30dB is basically achieved.
The first feeder line and the second feeder line are perpendicular to each other, and the intersection point is located at the center point of the antenna radiation medium substrate.
The coaxial line 4 is respectively connected with the first feeder line and the second feeder line, and the parasitic wafer and the dielectric substrate of the parasitic unit are provided with two through holes for the coaxial line to pass through.
The parasitic element is in the shape of a circular slice with a diameter of 36mm (0.25 lambda)2GHz) The wafer is positioned at 6.5mm right below the antenna, and after the height of the antenna is reduced, the wafer introduces a capacitor to strengthen the matching of the antenna, so that the wafer has an obvious improvement effect on low-frequency and high-frequency matching.
The four radiating arms are identical in structure and size, each hexagonal patch is composed of two identical isosceles triangles and a rectangle, a horseshoe-shaped gap is formed in the center of each hexagonal patch, the beam width of each radiating arm cannot be deteriorated along with the reduction of the height of the antenna, and the radiating arms have good stability.
The U-shaped gap protrudes towards the top angle of the hexagon, the opening direction of the U-shaped gap faces the center of the antenna, the radius of a central circle of the U-shaped gap is 6.8mm, the width of the gap is 3mm, the perimeter of the U-shaped gap is about 32mm, and the length of the U-shaped gap is approximately one quarter of the wavelength of a high-frequency resonance point and is 0.25 lambda2.65GHzThe bandwidth of the antenna can be expanded through the horseshoe-shaped gap.
The horseshoe-shaped slot is used for expanding the bandwidth of the antenna, and the slot can be changed into an inverted U-shaped slot or a right-angle slot from a horseshoe-shaped slot, so that the effect of expanding the bandwidth of the antenna can be achieved.
The super-surface unit comprises a rectangular patch and a super-surface dielectric substrate, and the super-surface is arranged 2.5mm above the dual-polarized dipole antenna through four support columns. The rectangular patches 8 are arranged on the upper surface of the super-surface dielectric substrate and distributed in an array, in the embodiment, 6 × 6 identical rectangular patches are periodically arranged, the side length of each rectangle is 18.8mm, and the distance between the rectangular patches is 1.2 mm; the super surface medium substrate is 120 multiplied by 0.5mm3The material of the dielectric substrate is the same as that of the dielectric substrate of the antenna radiator, and the super-surface dielectric substrate is larger than that of the dielectric substrate of the antenna radiator.
The reflecting plate is in a non-closed metal surrounding edge type, a metal sheet 9 with the height of 19.5mm is erected at a position 7.5mm away from the edge of the metal floor, the length of the metal sheet is 100mm, the matching of the antenna at low frequency can be improved, and the whole reflecting plate is 150mm multiplied by 150mm2。
The antenna radiation medium substrate in the embodiment adopts a plate Taconn TLY, the thickness of the plate Taconn TLY is 0.5mm, and the relative dielectric constant of the plate Taconn TLY is 2.2.
The antenna radiation unit is of a planar structure, the dual-polarization bandwidth of 1412MHz-2716MHz can be realized, and the return loss is larger than 15 dB.
As shown in FIG. 6, the super-surface based low-profile broadband base station antenna reduces the profile height of the antenna from 45mm to 22.5mm (0.154 lambda)c,λc2.05GHz) and maintains the excellent performance of the original antenna, and has stable beam width and gain.
Example 2
A communication device comprising a super-surface based low-profile broadband base station antenna of the present invention.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A low-profile broadband base station antenna based on a super surface is characterized by comprising a dual-polarized planar dipole antenna and a super surface unit;
the dual-polarized planar dipole antenna comprises antenna radiation units, parasitic units and a reflecting plate, wherein the antenna radiation units are arranged above the reflecting plate through supporting columns, the parasitic units are arranged between the reflecting plate and the antenna radiation units, and the super-surface units are located above the antenna radiation units.
2. The low-profile broadband base station antenna according to claim 1, wherein the antenna radiating element comprises an antenna radiating dielectric substrate, a third radiating arm and a fourth radiating arm are disposed on an upper surface of the antenna radiating dielectric substrate, a first radiating arm and a second radiating arm are disposed on a lower surface of the antenna radiating dielectric substrate, the first radiating arm and the third radiating arm are symmetric with respect to a center of the antenna radiating dielectric substrate to form a + 45-degree polarized element, and the second radiating arm and the fourth radiating arm are symmetric with respect to the center of the antenna radiating dielectric substrate to form a-45-degree polarized element.
3. The low-profile, broadband base station antenna of claim 2 further comprising a feed structure, the feed structure comprising a first feed printed on a lower surface of the antenna radiating dielectric substrate for feeding +45 degree polarized elements and a second feed printed on an upper surface of the antenna radiating dielectric substrate for feeding-45 degree polarized elements.
4. The low-profile broadband base station antenna of claim 1, wherein the super-surface unit comprises a super-surface dielectric substrate, and rectangular patches distributed in an array are disposed on an upper surface of the super-surface dielectric substrate.
5. The low-profile broadband base station antenna of claim 2, wherein the first, second, third and fourth radiating arms are identical in structure and each comprise two identical hexagonal patches of isosceles triangles and rectangles.
6. The low-profile broadband base station antenna of claim 5, wherein the hexagonal patch is provided with a horseshoe-shaped slot opening towards the center of the antenna dielectric substrate.
7. A low profile broadband base station antenna according to any of claims 1 to 6, wherein the reflector plate is non-closed metal-walled.
8. The low-profile, broadband base station antenna of claim 3 further comprising a coaxial line, the coaxial line being connected to the first feed line and the second feed line, respectively.
9. A low profile broadband base station antenna according to claim 3, wherein the first feed line is perpendicular to the second feed line, the perpendicular intersection being located at a centre point of the antenna radiating dielectric substrate.
10. A communication device comprising a low profile broadband base station antenna according to any one of claims 1 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020104251930 | 2020-05-19 | ||
| CN202010425193 | 2020-05-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112366443A true CN112366443A (en) | 2021-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011059485.3A Pending CN112366443A (en) | 2020-05-19 | 2020-09-30 | Low-profile broadband base station antenna based on super surface and communication equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690597A (en) * | 2021-08-09 | 2021-11-23 | 国网江苏省电力有限公司镇江供电分公司 | Low-profile broadband circularly polarized antenna based on super surface |
| CN113690600A (en) * | 2021-08-16 | 2021-11-23 | 电子科技大学 | Dual-polarized omnidirectional super-surface antenna |
| CN115173065A (en) * | 2022-08-26 | 2022-10-11 | 华南理工大学 | Multi-mode fused broadband dual-polarized base station antenna and communication equipment |
| CN116960637A (en) * | 2023-09-21 | 2023-10-27 | 华南理工大学 | Low-profile dual-frequency fusion antenna based on dual-function structure and communication equipment |
| CN117855863A (en) * | 2024-02-19 | 2024-04-09 | 南通大学 | Electromagnetic transparent base station antenna and array based on grid |
-
2020
- 2020-09-30 CN CN202011059485.3A patent/CN112366443A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690597A (en) * | 2021-08-09 | 2021-11-23 | 国网江苏省电力有限公司镇江供电分公司 | Low-profile broadband circularly polarized antenna based on super surface |
| CN113690597B (en) * | 2021-08-09 | 2024-03-26 | 国网江苏省电力有限公司镇江供电分公司 | Low-profile broadband circularly polarized antenna based on super surface |
| CN113690600A (en) * | 2021-08-16 | 2021-11-23 | 电子科技大学 | Dual-polarized omnidirectional super-surface antenna |
| CN115173065A (en) * | 2022-08-26 | 2022-10-11 | 华南理工大学 | Multi-mode fused broadband dual-polarized base station antenna and communication equipment |
| CN115173065B (en) * | 2022-08-26 | 2023-08-04 | 华南理工大学 | Multimode-fused broadband dual-polarized base station antenna and communication equipment |
| CN116960637A (en) * | 2023-09-21 | 2023-10-27 | 华南理工大学 | Low-profile dual-frequency fusion antenna based on dual-function structure and communication equipment |
| CN116960637B (en) * | 2023-09-21 | 2024-01-02 | 华南理工大学 | Low-profile dual-frequency fusion antenna based on dual-function structure and communication equipment |
| CN117855863A (en) * | 2024-02-19 | 2024-04-09 | 南通大学 | Electromagnetic transparent base station antenna and array based on grid |
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