CN115441177A - Dual-band broadband vehicle-mounted antenna and communication equipment suitable for vehicle-mounted satellite and vehicle networking communication - Google Patents
Dual-band broadband vehicle-mounted antenna and communication equipment suitable for vehicle-mounted satellite and vehicle networking communication Download PDFInfo
- Publication number
- CN115441177A CN115441177A CN202211160363.2A CN202211160363A CN115441177A CN 115441177 A CN115441177 A CN 115441177A CN 202211160363 A CN202211160363 A CN 202211160363A CN 115441177 A CN115441177 A CN 115441177A
- Authority
- CN
- China
- Prior art keywords
- dielectric substrate
- vehicle
- metal arm
- short
- patch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004891 communication Methods 0.000 title claims abstract description 42
- 230000006855 networking Effects 0.000 title claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 111
- 230000005404 monopole Effects 0.000 claims abstract description 32
- 230000005855 radiation Effects 0.000 claims abstract description 19
- 230000010287 polarization Effects 0.000 claims abstract description 16
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 230000005284 excitation Effects 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 146
- 238000005530 etching Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 3
- 238000003491 array Methods 0.000 abstract 2
- 238000004088 simulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
-
- 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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
-
- 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
Landscapes
- Waveguide Aerials (AREA)
Abstract
The application provides a dual-band broadband vehicle-mounted antenna and communication equipment suitable for vehicle-mounted satellites and vehicle networking communication, and the dual-band broadband vehicle-mounted antenna comprises a first dielectric substrate, a second dielectric substrate and a third dielectric substrate which are sequentially stacked from top to bottom, wherein swastika-shaped gap coupling patch arrays, feed structures and top-loaded monopole arrays are respectively arranged on the first dielectric substrate, the second dielectric substrate and the third dielectric substrate; the swastika-shaped gap coupling patch array is used for a main radiator in a low-frequency right-hand circularly polarized side-emitting state and an excitation structure in a high-frequency vertical polarization double-end-emitting state, and the monopole array loaded at the top end is used for realizing high-frequency radiation vertical polarization double-end-emitting electromagnetic waves. This application realizes the dual-band design under the condition that does not increase the extra size of patch antenna, and radiates limit-fire dextrorotation circular polarization and bi-polar vertical polarization electromagnetic wave respectively in two frequency channels, and its radiation characteristic is applicable to vehicle satellite communication and vehicle networking communication extremely. Meanwhile, the antenna has the characteristics of wide band, simple structure and low cost.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a dual-band broadband vehicle-mounted antenna and communication equipment suitable for vehicle-mounted satellite and internet of vehicles communication.
Background
With the development of 5G communication accelerated automatic driving technology, stable real-time information interaction between vehicles and other devices such as satellites and internet of vehicles systems is of great significance. The vehicular satellite communication antenna generally needs to cover a C-band and has an edge-emitting right-hand circular polarization characteristic. Meanwhile, an antenna in the car networking system needs to cover a special short-wave communication frequency band and has a linear polarization omnidirectional/double-terminal radiation characteristic. In order to accomplish the above communication task simultaneously, it is necessary to integrate a plurality of different antennas with single function into the system, but this inevitably increases the occupied space, and integrates a plurality of antennas in a narrow system space, so that the isolation between the antenna ports is deteriorated, and the communication quality is also deteriorated. Therefore, there is a wide interest and demand for dual-band, broadband, multifunctional antennas with polarization and pattern diversity characteristics.
Disclosure of Invention
One object of the present invention is to provide a dual-band broadband vehicle antenna suitable for vehicle-mounted satellite and internet of vehicles communication.
The invention aims to realize the technical scheme, which comprises a first dielectric substrate, a second dielectric substrate and a third dielectric substrate which are sequentially stacked from top to bottom, wherein the first dielectric substrate is provided with a swastika-shaped gap coupling patch array, the second dielectric substrate is provided with a feed structure, and the third dielectric substrate is provided with a monopole array loaded at the top end;
the swastika-shaped gap coupling patch array comprises four swastika-shaped patches, a main radiator and an excitation structure, wherein the four swastika-shaped patches are sequentially arranged along the center point of the upper surface of the first dielectric substrate in a 90-degree rotating manner, and the main radiator is used for a low-frequency right-handed circularly polarized side-emitting state and the excitation structure is used for a high-frequency vertical polarized double-end-emitting state;
the feed structure comprises a first L-shaped feed patch unit and a second L-shaped feed patch unit which are arranged along the center point of the upper surface of the second dielectric substrate in a rotating mode of 180 degrees, and the first L-shaped feed patch unit and the second L-shaped feed patch unit are used for exciting and disturbing a broadband mode generated by the swastika-shaped gap coupling patch array so as to realize low-frequency edge-emission right-hand circularly polarized radiation;
the top-loaded monopole array comprises four top-loaded monopole units symmetrically arranged along two central lines of the upper surface of the third dielectric substrate, and the top-loaded monopole units are used for realizing high-frequency radiation vertical polarization double-end-emission electromagnetic waves.
Further, the swastika-shaped patch is obtained by etching four etching grooves with the same length and width from a square patch, the four etching grooves are sequentially rotated by 90 degrees along the center point of the swastika-shaped patch, and the etching grooves are used for improving the high-frequency impedance bandwidth.
Further, the first L-shaped feed patch unit includes a first long metal arm and a first short metal arm that are perpendicular to each other, and the first long metal arm and the first short metal arm are connected through a first metal branch;
the second L-shaped feed patch unit comprises a second long metal arm and a second short metal arm which are perpendicular to each other, and the second long metal arm and the second short metal arm are connected through a second metal branch;
the included angle between the central axis of each of the first long metal arm and the second long metal arm and the central axis of the upper surface of the second dielectric substrate is 45 degrees, a first half-wavelength horizontal branch is etched in the first long metal arm, a second half-wavelength horizontal branch is etched in the second long metal arm, and the lower end faces of the tail ends of the first half-wavelength horizontal branch and the second half-wavelength horizontal branch are connected with grounding short-circuit columns penetrating through the second dielectric substrate and the third dielectric substrate.
Further, the top-loaded monopole unit comprises a circular patch arranged on the third dielectric substrate and a metal column connected with the lower end face of the circular patch and arranged inside the third dielectric substrate;
circular grooves are etched on the two circular patches arranged diagonally and used for avoiding the short circuit phenomenon caused by the half-wavelength short circuit branches passing through the circular patches when the half-wavelength short circuit branches are short-circuited to the ground through the metal posts.
The metal floor is printed on the lower surface of the third medium substrate;
the first dielectric substrate, the second dielectric substrate and the third dielectric substrate are of a mean square structure, and the side lengths of the first dielectric substrate, the second dielectric substrate and the third dielectric substrate are the same.
Further, the first dielectric substrate, the second dielectric substrate and the third dielectric substrate are made of a material with the model F4B, the relative dielectric constant of the first dielectric substrate, the relative magnetic conductivity of the second dielectric substrate and the third dielectric substrate is 2.2, the loss tangent of the first dielectric substrate is 1.0, the loss tangent of the second dielectric substrate is 0.0019, and the side length of the first dielectric substrate, the side length of the second dielectric substrate and the side length of the third dielectric substrate are all 138mm;
the thickness h of the first dielectric substrate 1 And a thickness h of the second dielectric substrate 2 All are 1.575mm, and the thickness h of the third medium substrate 3 Is 3mm.
Further, the side length l of the swastika patch 1 12 mm-14 mm, and the distance g between two swastika-shaped patches 1 0.5mm to 1mm;
the length slot _ l of the etching groove is 4 mm-5 mm, and the width slot _ w of the etching groove is 0.5 mm-1 mm;
length l of the first long metal arm 3 12-13 mm, the width w of the first long metal arm 1 2-3 mm, the length l of the second long metal arm 5 12-13 mm, the width w of the second long metal arm 3 Is 2-3 mm;
length l of the first short metal arm and the second short metal arm 7 Are all 5-6 mm, and the width w of the first short metal arm and the second short metal arm 5 All are 2-3 mm;
length l of the first metal branch 4 12-13 mm, the width w of the first metal branch knot 2 1-2 mm, the length l of the second metal branch 6 12-13 mm, the width w of the second metal branch 4 1-2 mm, radius r of the grounding short-circuit column 1 0.1-0.5 mm, the length of the grounding short circuit column is 4-5 mm;
distance l between top-loaded monopole units symmetrical about one central line on the upper surface of the third dielectric substrate 8 The distance l between the top-loaded monopole units is 15-16 mm and is symmetrical about the other central line of the upper surface of the third dielectric substrate 9 20mm to 21mm;
radius r of the circular patch 3 2 mm-3 mm, the radius r of the metal column 2 Is 0.2 mm-1 mm, and the height of the metal column is 2 mm-4 mm.
Further, the side length l of the swastika patch 1 Is 13.8mm, and the distance g between two swastika-shaped patches 1 0.76mm;
the length slot _ l of the etching groove is 4.5mm, the width slot _ w of the etching groove is 0.9mm, and the distance l between the length side of the etching groove and the parallel side at the same side of the swastika-shaped patch 2 10.45mm;
length l of the first long metal arm 3 12.45mm, the width w of the first long metal arm 1 2.34mm, the length l of the second long metal arm 5 12.7mm, the width w of the second long metal arm 3 Is 2mm;
length l of the first short metal arm and the second short metal arm 7 Are all 5.2mm, the width w of the first short metal arm and the second short metal arm 5 Are all 2.7mm;
length l of the first metal branch 4 Is 12.04mm, the width w of the first metal branch 2 1.3mm, the length l of the second metal branch 6 Is 12.34mm, the width w of the second metal branch 4 Is 1mm, the radius r of the grounding short-circuit column 1 0.2mm, and the length of the grounding short-circuit column is 4.575mm;
relating to the third mediumDistance l between top-loaded monopole units with one central line symmetrical on upper surface of substrate 8 15.27mm, distance l between the top-loaded monopole units symmetrical about another centerline of the upper surface of the third dielectric substrate 9 Is 20.2mm;
radius r of the circular patch 3 Is 2.45mm, the radius r of the metal column 2 Is 0.5mm, and the height of the metal column is 3mm.
It is another object of the present invention to provide a communication device.
The invention is realized by the technical scheme that the dual-band broadband vehicle-mounted antenna comprises the dual-band broadband vehicle-mounted antenna which is suitable for vehicle-mounted satellite and vehicle networking communication.
Due to the adoption of the technical scheme, the invention has the following advantages:
the dual-band antenna realizes dual-band design without increasing the extra size of the patch antenna, realizes edge-fire right-hand circularly polarized radiation and dual-end-fire vertical polarized radiation in two frequency bands respectively, and has radiation characteristics extremely suitable for vehicle-mounted satellite communication and vehicle networking communication. Meanwhile, the antenna has the characteristics of wide band, simple structure, low cost and the like.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.
Drawings
The drawings of the present invention are described below.
Fig. 1 is a schematic 3D structure diagram of the vehicle antenna according to the present invention.
Fig. 2 is a side view of the vehicle antenna of the present invention.
Fig. 3 is a top view of a swastika-shaped gap coupling patch array in the vehicle-mounted antenna.
Fig. 4 is a plan view of a feeding structure in the vehicle antenna of the present invention.
Fig. 5 is a size diagram of a feeding structure in the vehicle antenna of the present invention.
Fig. 6 is a top view of a top-loaded monopole array in a vehicle antenna of the present invention.
FIG. 7 shows a reflection coefficient (| S) of the vehicle antenna according to an embodiment of the present invention 11 |) plot of frequency versus frequency and achievable gain plot.
Fig. 8 is a graph of the low frequency axis ratio of the vehicle antenna as a function of frequency in an embodiment of the present invention.
Fig. 9 is a graph of the overall efficiency of the vehicle antenna as a function of frequency in an embodiment of the present invention.
Fig. 10 (a), (b), and (c) are graphs showing the angle-dependent gain of the vehicle-mounted antenna at the frequency points of 3.8GHz, 4.2GHz, and 5.9GHz, respectively, in the embodiment of the present invention.
In the figure: 1-a first dielectric substrate; 2-a second dielectric substrate; 3-a third dielectric substrate; 4-swastika-shaped paster; 5-a first L-shaped feed patch element; 6-a second L-shaped feed patch unit; 7-top-loaded monopole elements; 8-metal floor; 41-etching groove; 51-a first long metal arm; 52-first short metal arm; 53-first metal branch; 54-first half-wavelength horizontal minor matters; 55-grounded shorting bar; 61-a second long metal arm; 62-a second short metal arm; 63-a second metal branch; 64-a second half-wavelength horizontal branch; 71-circular patch; 72-metal posts; 73-circular groove.
Detailed Description
The invention is further illustrated by the following figures and examples.
In the description of the embodiments of the present invention, it should be noted that the terms "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
Example 1:
the dual-band broadband vehicle-mounted antenna suitable for vehicle-mounted satellites and vehicle networking communication shown in fig. 1-6 is characterized by comprising a first dielectric substrate 1, a second dielectric substrate 2 and a third dielectric substrate 3 which are sequentially stacked from top to bottom, wherein a swastika-shaped gap coupling patch array is arranged on the first dielectric substrate 1, a feed structure is arranged on the second dielectric substrate 2, and a monopole array loaded at the top end is arranged on the third dielectric substrate 3;
the swastika-shaped gap coupling patch array comprises four swastika-shaped patches 4 which are sequentially rotated by 90 degrees along the central point of the upper surface of the first dielectric substrate 1, a main radiator for a low-frequency right-hand circularly polarized side emission state and an excitation structure for a high-frequency vertical polarized double-end emission state;
the feed structure comprises a first L-shaped feed patch unit 5 and a second L-shaped feed patch unit 6 which are arranged along the central point of the upper surface of the second dielectric substrate 2 in a rotating mode of 180 degrees, and the first L-shaped feed patch unit 5 and the second L-shaped feed patch unit 6 are used for exciting and disturbing a broadband mode generated by the swastika-shaped gap coupling patch array so as to realize low-frequency edge-emission right-hand circularly polarized radiation;
the top-loaded monopole array comprises four top-loaded monopole units 7 symmetrically arranged along two central lines of the upper surface of the third dielectric substrate 3, and the top-loaded monopole units 7 are used for realizing high-frequency radiation vertical polarization double-end radio electromagnetic waves.
In the embodiment of the invention, a 50-ohm coaxial cable is adopted to feed the vehicle-mounted antenna through the balun, and an inner conductor and an outer conductor of the 50-ohm coaxial cable are respectively connected with a microstrip line of the balun and an exponential gradient ground plate structure.
As an embodiment of the invention, the swastika-shaped patch 4 is obtained by etching four etching grooves 41 with the same length and width from a square patch, the four etching grooves 41 are sequentially arranged by rotating 90 degrees along a center point of the swastika-shaped patch 4, and the etching grooves 41 are used for improving a high-frequency impedance bandwidth.
As an embodiment of the present invention, the first L-shaped feeding patch element 5 includes a first long metal arm 51 and a first short metal arm 52 that are perpendicular to each other, and the first long metal arm 51 and the first short metal arm 52 are connected through a first metal branch 53;
the second L-shaped feed patch unit 6 comprises a second long metal arm 61 and a second short metal arm 62 which are perpendicular to each other, and the second long metal arm 61 and the second short metal arm 62 are connected through a second metal branch 63;
the included angle between the central axis of each of the first long metal arm 51 and the second long metal arm 61 and the central axis of the upper surface of the second dielectric substrate 2 is 45 °, a first half-wavelength horizontal branch 54 is etched in the first long metal arm 51, a second half-wavelength horizontal branch 64 is etched in the second long metal arm 61, and the lower end surfaces of the ends of the first half-wavelength horizontal branch 54 and the second half-wavelength horizontal branch 64 are connected with a grounding short-circuit column 55 penetrating through the second dielectric substrate 2 and the third dielectric substrate 3.
In the embodiment of the present invention, the first half-wavelength horizontal branch 54 and the ground short-circuit column 55, and the second half-wavelength horizontal branch 64 and the ground short-circuit column 55 all form a half-wavelength short-circuit branch, and the half-wavelength short-circuit branch is used for improving the anti-interference characteristics of the proposed vehicle-mounted antenna and the proposed communication device.
As an embodiment of the present invention, the top-loaded monopole unit 7 includes a circular patch 71 disposed on the third dielectric substrate 3, and a metal column 72 connected to a lower end face of the circular patch 71 and disposed inside the third dielectric substrate 3;
In the embodiment of the invention, by reasonably setting the distance between two adjacent top loading monopole units 7, the swastika-shaped gap coupling patch array can excite and emit electromagnetic waves at two ends in high-frequency radiation vertical polarization.
As an embodiment of the invention, the floor further comprises a metal floor 8, wherein the metal floor 8 is printed on the lower surface of the dielectric substrate 3;
the first dielectric substrate 1, the second dielectric substrate 2 and the third dielectric substrate 3 are of square structures, and the side lengths are the same.
In the present example, the side length dimension of the metal floor 8 is the same as the side length dimension of the third dielectric substrate 3.
As an embodiment of the invention, the first dielectric substrate 1, the second dielectric substrate 2 and the third dielectric substrate 3 are made of a material with the model number F4B, the relative dielectric constant of the material is 2.2, the relative magnetic permeability of the material is 1.0, the loss tangent of the material is 0.0019, and the side length of the material is 138mm;
thickness h of the first dielectric substrate 1 1 And the thickness h of the second dielectric substrate 2 2 Are all 1.575mm, and the thickness h of the third dielectric substrate 3 3 Is 3mm.
As an embodiment of the invention, the side length l of the swastika patch 4 is 1 12 mm-14 mm, and the distance g between two swastika-shaped patches 1 0.5mm to 1mm;
the length slot _ l of the etching groove 41 is 4 mm-5 mm, and the width slot _ w of the etching groove 41 is 0.5 mm-1 mm;
length l of said first long metal arm 51 3 12-13 mm, the width w of the first long metal arm 51 1 2-3 mm, the length l of the second long metal arm 61 5 12 to 13mm, of said second long metal arm 61Width w 3 2-3 mm;
the first short metal arm 52 and the second short metal arm 62 have a length l 7 Are all 5-6 mm, and the width w of the first short metal arm 52 and the second short metal arm 62 5 Are all 2-3 mm;
the length l of the first metal branch 53 4 12-13 mm, the width w of the first metal branch 53 2 1-2 mm, the length l of the second metal branch 63 6 12-13 mm, the width w of the second metal branch 63 4 1-2 mm, radius r of the grounding short-circuit column 55 1 0.1-0.5 mm, the length of the grounding short-circuit column 55 is 4-5 mm;
the distance l between the top-loaded monopole units 7 which is symmetrical about one of the center lines of the upper surface of the third dielectric substrate 3 8 15 mm-16 mm, and the distance l between the top-loaded monopole units 7 which are symmetrical about the other central line on the upper surface of the third dielectric substrate 3 9 20mm to 21mm;
radius r of the circular patch 71 3 2 mm-3 mm, the radius r of the metal column 72 2 Is 0.2mm to 1mm, and the height of the metal column 72 is 2mm to 4mm.
As an embodiment of the invention, the side length dimension l of the swastika-shaped patch 4 1 Is 13.8mm, and the distance g between two swastika-shaped patches 1 0.76mm;
the length slot _ l of the etching groove 41 is 4.5mm, the width slot _ w of the etching groove 41 is 0.9mm, and the distance l between the length side of the etching groove 41 and the parallel side at the same side of the swastika-shaped patch 4 2 10.45mm;
length l of said first long metal arm 51 3 12.45mm, the width w of the first long metal arm 51 1 2.34mm, the length l of the second long metal arm 61 5 12.7mm, the width w of the second long metal arm 61 3 Is 2mm;
the first short metal arm 52 and the second short metal arm 62 have a length l 7 Each 5.2mm, the first short metal arm 52 and the second short metal arm 62 having a width w 5 Are all 2.7mm;
the length l of the first metal branch 53 4 12.04mm, the width w of the first metal branch 53 2 1.3mm, the length l of the second metal branch 63 6 12.34mm, the width w of the second metal branch 63 4 1mm, radius r of the ground shorting post 55 1 0.2mm, the length of the ground shorting post 55 is 4.575mm;
the distance l between the top-loaded monopole units 7 which is symmetrical about one of the center lines of the upper surface of the third dielectric substrate 3 8 15.27mm, the distance l between the top-loaded monopole units 7 being symmetrical about another centerline of the upper surface of the third dielectric substrate 3 9 Is 20.2mm;
radius r of the circular patch 71 3 2.45mm, the radius r of the metal column 72 2 Is 0.5mm, and the height of the metal pillar 72 is 3mm.
In the embodiment of the invention, the swastika patch 4, the first L-shaped feeding patch unit 5, the second L-shaped feeding patch unit 6 and the round patch 71 are all copper-clad films, and the thicknesses of the copper-clad films are all 0.017mm.
After the initial design is completed, high frequency electromagnetic simulation software HFSS18.0 is used for simulation analysis, and the dimensions of various parameters obtained after simulation optimization are shown in table 1 below.
TABLE 1 table of optimum dimensions for various parameters of the invention
According to the optimal parameters, the HFSS18.0 is used for carrying out simulation analysis on characteristic parameters such as S parameters, radiation directions and the like of the designed dual-band broadband vehicle-mounted antenna suitable for vehicle-mounted satellites and vehicle networking communication, and the analysis result is as follows:
FIG. 7 shows the reflection coefficient (| S) of the antenna of the present invention 11 I) curve and gain curve, low frequency impedance bandwidth (antenna S) 11 |<-10 dB) range from 3.58GHz to 4.38GHz, and a high frequency impedance bandwidth range from 5.66GHz to 6.24GHz, simulation results show that peak gains of 5.0dBi and 6.5dBi can be achieved in the low frequency and high frequency ranges.
As shown in fig. 8, which is an axial ratio curve of the antenna of the present invention, it can be seen that the antenna has a good circular polarization effect between 3.55GHz and 4.25GHz, and the corresponding fractional bandwidth is 17.9%. Therefore, in the broadside right-hand circular polarization state, the overlapping working bandwidth range of the impedance and the axial ratio bandwidth is 3.58-4.25 GHz, and the corresponding fractional bandwidth is 17.1%.
As shown in fig. 9, which is a total efficiency curve of the antenna of the present invention, the efficiency reaches 95% in both the high-frequency operating bandwidth and the low-frequency operating bandwidth, and meanwhile, the minimum value of the total radiation efficiency between the high frequency and the low frequency is only 22%, which indicates that the antenna has good radiation characteristics in the band and has a good out-of-band rejection level between the two frequency bands.
As shown in fig. 10 (a) - (c), the curves of the antenna of the present invention with respect to the variation of gain with angle at the frequency points of 3.8GHz, 4.2GHz, and 5.9GHz show that: at the frequency points of 3.8GHz and 4.2GHz, the antenna shows good edge-emitting right-hand circularly polarized radiation characteristics; at 5.9GHz, the antenna shows good double-end-fire radiation characteristics;
in addition, the dual-band, compact and broadband vehicle-mounted antenna simultaneously suitable for vehicle-mounted satellite communication and vehicle networking communication has the advantages of simple structure, broadband, easiness in processing and low cost. The dual-band, compact and broadband vehicle-mounted antenna simultaneously suitable for vehicle-mounted satellite communication and vehicle networking communication can be widely applied to a vehicle-mounted communication system by virtue of the characteristics of dual-band, multifunction, compactness, specific directional diagram and polarization conversion characteristics and the like.
Example 2:
a communication device comprises the dual-band broadband vehicle-mounted antenna suitable for vehicle-mounted satellite and vehicle networking communication. Through the dual-band, compact and broadband vehicle-mounted antenna which is simultaneously suitable for vehicle-mounted satellite communication and vehicle networking communication, data receiving and transmitting signals can be effectively enhanced. Other configurations of the communication device can be implemented with reference to the prior art.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (9)
1. The dual-band broadband vehicle-mounted antenna is characterized by comprising a first dielectric substrate (1), a second dielectric substrate (2) and a third dielectric substrate (3) which are sequentially stacked from top to bottom, wherein a swastika-shaped gap coupling patch array is arranged on the first dielectric substrate (1), a feed structure is arranged on the second dielectric substrate (2), and a monopole array loaded at the top end is arranged on the third dielectric substrate (3);
the swastika-shaped gap coupling patch array comprises four swastika-shaped patches (4) which are sequentially rotated by 90 degrees along the central point of the upper surface of the first dielectric substrate (1), a main radiator for a low-frequency right-hand circularly polarized side emission state and an excitation structure for a high-frequency vertical polarization double-end emission state;
the feed structure comprises a first L-shaped feed patch unit (5) and a second L-shaped feed patch unit (6) which are arranged along the central point of the upper surface of the second dielectric substrate (2) in a 180-degree rotating manner, and the first L-shaped feed patch unit (5) and the second L-shaped feed patch unit (6) are used for exciting and disturbing a broadband mode generated by the swastika-shaped gap coupling patch array so as to realize low-frequency edge radiation right-hand circular polarization radiation;
the top-loaded monopole array comprises four top-loaded monopole units (7) symmetrically arranged along two central lines of the upper surface of the third dielectric substrate (3), and the top-loaded monopole units (7) are used for realizing high-frequency radiation vertical polarization double-end-emission electromagnetic waves.
2. The dual-band broadband vehicle-mounted antenna applicable to vehicle-mounted satellites and vehicle networking communication according to claim 1, wherein the swastika-shaped patch (4) is obtained by etching four etching grooves (41) with the same length and width from a square patch, the four etching grooves (41) are sequentially arranged by rotating 90 degrees along the central point of the swastika-shaped patch (4), and the etching grooves (41) are used for improving high-frequency impedance bandwidth.
3. The dual-band broadband vehicle antenna suitable for satellite and internet of vehicles communication according to claim 1, wherein the first L-shaped feeding patch element (5) comprises a first long metal arm (51) and a first short metal arm (52) perpendicular to each other, and the first long metal arm (51) and the first short metal arm (52) are connected through a first metal branch (53);
the second L-shaped feeding patch unit (6) comprises a second long metal arm (61) and a second short metal arm (62) which are perpendicular to each other, and the second long metal arm (61) is connected with the second short metal arm (62) through a second metal branch (63);
the included angle between the central axis of each of the first long metal arm (51) and the second long metal arm (61) and the central axis of the upper surface of the second dielectric substrate (2) is 45 degrees, a first half-wavelength horizontal branch (54) is etched in the first long metal arm (51), a second half-wavelength horizontal branch (64) is etched in the second long metal arm (61), and the lower end faces of the tail ends of the first half-wavelength horizontal branch (54) and the second half-wavelength horizontal branch (64) are connected with grounding short-circuit columns (55) penetrating through the second dielectric substrate (2) and the third dielectric substrate (3).
4. The dual-band broadband vehicle antenna suitable for satellite and internet of vehicles communication according to claim 1, wherein the top-loaded monopole unit (7) comprises a circular patch (71) disposed on the third dielectric substrate (3), and a metal post (72) connected to the lower end face of the circular patch (71) and disposed inside the third dielectric substrate (3);
circular grooves (73) are etched on the two circular patches (71) which are arranged diagonally, and the circular grooves (73) are used for avoiding a short circuit phenomenon caused by the half-wavelength short circuit branches (6) passing through the circular patches (71) when the half-wavelength short circuit branches are short-circuited to the ground through the metal posts (72).
5. The dual-band broadband vehicle antenna suitable for vehicle-mounted satellite and internet of vehicles communication according to claim 1, further comprising a metal floor (8), wherein the metal floor (8) is printed on the lower surface of the dielectric substrate (3);
the first dielectric substrate (1), the second dielectric substrate (2) and the third dielectric substrate (3) are of a mean square structure, and the side lengths are the same.
6. The dual-band broadband vehicle-mounted antenna suitable for vehicle-mounted satellite and vehicle networking communication of claim 5, wherein the first dielectric substrate (1), the second dielectric substrate (2) and the third dielectric substrate (3) are made of a material with the model of F4B, the relative dielectric constant of the first dielectric substrate is 2.2, the relative magnetic permeability of the first dielectric substrate is 1.0, the loss tangent of the first dielectric substrate is 0.0019, and the side lengths of the first dielectric substrate, the second dielectric substrate and the third dielectric substrate are 138mm;
the thickness h of the first dielectric substrate (1) 1 And the thickness h of the second dielectric substrate (2) 2 Are all 1.575mm, and the thickness h of the third dielectric substrate (1) 3 Is 3mm.
7. The dual-band broadband vehicle-mounted antenna suitable for vehicle-mounted satellites and vehicle networking communication according to claim 2, 3 or 4, wherein the side length l of the swastika-shaped patch (4) 1 12 mm-14 mm, and the distance g between two swastika-shaped patches 1 0.5mm to 1mm;
the length slot _ l of the etching groove (41) is 4-5 mm, and the width slot _ w of the etching groove (41) is 0.5-1 mm;
the length l of the first long metal arm (51) 3 12-13 mm, the width w of the first long metal arm (51) 1 2-3 mm, the length l of the second long metal arm (61) 5 12-13 mm, the width w of the second long metal arm (61) 3 Is 2-3 mm;
the first short metal arm (52) and the second short metal arm (62) have a length l 7 5-6 mm in all, and the width w of the first short metal arm (52) and the second short metal arm (62) 5 All are 2-3 mm;
the length l of the first metal branch (53) 4 12-13 mm, the width w of the first metal branch (53) 2 1-2 mm, the length l of the second metal branch (63) 6 12-13 mm, the width w of the second metal branch (63) 4 1-2 mm, the radius r of the grounding short-circuit column (55) 1 0.1-0.5 mm, the length of the grounding short-circuit column (55) is 4-5 mm;
the distance l between the top-loaded monopole units (7) which is symmetrical about one central line on the upper surface of the third dielectric substrate (3) 8 15 mm-16 mm, and the distance l between the top-loaded monopole units (7) which are symmetrical about the other central line of the upper surface of the third dielectric substrate (3) 9 20mm to 21mm;
radius r of the circular patch (71) 3 2 mm-3 mm, the radius r of the metal column (72) 2 Is 0.2mm to 1mm, and the height of the metal column (72) is 2mm to 4mm.
8. The dual-band broadband vehicle-mounted antenna suitable for vehicle-mounted satellite and vehicle networking communication according to claim 7, wherein the side length dimension l of the swastika-shaped patch (4) 1 Is 13.8mm, and the distance g between two swastika-shaped patches 1 Is 0.76mm;
the length slot _ l of the etching groove (41) is 4.5mm, the width slot _ w of the etching groove (41) is 0.9mm, and the distance l between the length side of the etching groove (41) and the parallel side at the same side of the swastika-shaped patch (4) 2 Is 10.45mm;
the length l of the first long metal arm (51) 3 12.45mm, the width w of the first long metal arm (51) 1 2.34mm, the length l of the second long metal arm (61) 5 12.7mm, the width w of the second long metal arm (61) 3 Is 2mm;
the first short metal arm (52) and the second short metal arm (62) have a length l 7 Each 5.2mm, the first short metal arm (52) and the second short metal arm (62) having a width w 5 Are all 2.7mm;
the length l of the first metal branch (53) 4 12.04mm, the width w of the first metal branch (53) 2 Is 1.3mm, the length l of the second metal branch (63) 6 Is 12.34mm, the width w of the second metal branch (63) 4 Is 1mm, the radius r of the grounding short-circuit column (55) 1 0.2mm, the length of the grounding short-circuit column (55) is 4.575mm;
the distance l between the top-loaded monopole units (7) which is symmetrical about one central line on the upper surface of the third dielectric substrate (3) 8 The distance l between the top-loaded monopole units (7) is 15.27mm and is symmetrical about the other central line of the upper surface of the third dielectric substrate (3) 9 Is 20.2mm;
radius r of the circular patch (71) 3 2.45mm, the radius r of the metal column (72) 2 Is 0.5mm, and the height of the metal column (72) is 3mm.
9. A communication device comprising a dual band broadband vehicle antenna suitable for satellite-based and internet-of-vehicle communications according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211160363.2A CN115441177B (en) | 2022-09-22 | 2022-09-22 | Dual-band broadband vehicle-mounted antenna suitable for vehicle-mounted satellite and vehicle networking communication and communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211160363.2A CN115441177B (en) | 2022-09-22 | 2022-09-22 | Dual-band broadband vehicle-mounted antenna suitable for vehicle-mounted satellite and vehicle networking communication and communication equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115441177A true CN115441177A (en) | 2022-12-06 |
| CN115441177B CN115441177B (en) | 2024-05-10 |
Family
ID=84248316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211160363.2A Active CN115441177B (en) | 2022-09-22 | 2022-09-22 | Dual-band broadband vehicle-mounted antenna suitable for vehicle-mounted satellite and vehicle networking communication and communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115441177B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117317576A (en) * | 2023-11-29 | 2023-12-29 | 福建福大北斗通信科技有限公司 | Broadband four-arm helical antenna |
| CN118073840A (en) * | 2024-04-18 | 2024-05-24 | 四川大学 | Small-size dual-frenquency band dual polarized wave filter antenna |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110005917A (en) * | 2011-01-01 | 2011-01-19 | 이은형 | Omni-directional dual polarization antenna with conical beam pattern |
| CN104821432A (en) * | 2015-05-15 | 2015-08-05 | 厦门大学 | Complementary-split-ring and annular-gap stereoscopic cavity array regulation and control Beidou double-frequency microstrip antenna |
| CN105305069A (en) * | 2015-10-26 | 2016-02-03 | 华南理工大学 | Differential feed implantable circularly polarized antenna working in ISM (Industrial Scientific Medical) frequency band |
| CN205752519U (en) * | 2016-05-13 | 2016-11-30 | 华南理工大学 | A kind of low section omnidirectional circular-polarized antenna working in ISM band |
| US20170047665A1 (en) * | 2015-08-12 | 2017-02-16 | Novatel, Inc. | Patch antenna with peripheral parasitic monopole circular arrays |
| US9825373B1 (en) * | 2015-09-15 | 2017-11-21 | Harris Corporation | Monopatch antenna |
| CN208548456U (en) * | 2018-08-21 | 2019-02-26 | 西安电子科技大学 | A kind of wideband directional circular polarized antenna with fluting parasitic patch |
| CN110148833A (en) * | 2019-05-13 | 2019-08-20 | 华东师范大学 | High-gain dual-frequency circular polarized antenna based on super surface |
| CN110311214A (en) * | 2019-06-10 | 2019-10-08 | 西安电子科技大学 | Broadband high-isolation dual circularly polarized antenna based on single layer artificial surface phasmon |
| CN111029738A (en) * | 2019-11-28 | 2020-04-17 | 西安电子科技大学 | Wide-beam microstrip antenna based on hybrid loading |
| CN111244626A (en) * | 2020-03-24 | 2020-06-05 | 福州福大信捷天线技术有限公司 | GNSS full-frequency-band satellite positioning terminal antenna |
| CN113078458A (en) * | 2021-03-03 | 2021-07-06 | 电子科技大学 | Low-profile low-elevation high-gain electromagnetic dipole antenna for satellite communication |
| CN114336024A (en) * | 2021-12-29 | 2022-04-12 | 杭州电子科技大学 | Broadband circularly polarized planar antenna array applied to millimeter wave communication system |
-
2022
- 2022-09-22 CN CN202211160363.2A patent/CN115441177B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110005917A (en) * | 2011-01-01 | 2011-01-19 | 이은형 | Omni-directional dual polarization antenna with conical beam pattern |
| CN104821432A (en) * | 2015-05-15 | 2015-08-05 | 厦门大学 | Complementary-split-ring and annular-gap stereoscopic cavity array regulation and control Beidou double-frequency microstrip antenna |
| US20170047665A1 (en) * | 2015-08-12 | 2017-02-16 | Novatel, Inc. | Patch antenna with peripheral parasitic monopole circular arrays |
| US9825373B1 (en) * | 2015-09-15 | 2017-11-21 | Harris Corporation | Monopatch antenna |
| CN105305069A (en) * | 2015-10-26 | 2016-02-03 | 华南理工大学 | Differential feed implantable circularly polarized antenna working in ISM (Industrial Scientific Medical) frequency band |
| CN205752519U (en) * | 2016-05-13 | 2016-11-30 | 华南理工大学 | A kind of low section omnidirectional circular-polarized antenna working in ISM band |
| CN208548456U (en) * | 2018-08-21 | 2019-02-26 | 西安电子科技大学 | A kind of wideband directional circular polarized antenna with fluting parasitic patch |
| CN110148833A (en) * | 2019-05-13 | 2019-08-20 | 华东师范大学 | High-gain dual-frequency circular polarized antenna based on super surface |
| CN110311214A (en) * | 2019-06-10 | 2019-10-08 | 西安电子科技大学 | Broadband high-isolation dual circularly polarized antenna based on single layer artificial surface phasmon |
| CN111029738A (en) * | 2019-11-28 | 2020-04-17 | 西安电子科技大学 | Wide-beam microstrip antenna based on hybrid loading |
| CN111244626A (en) * | 2020-03-24 | 2020-06-05 | 福州福大信捷天线技术有限公司 | GNSS full-frequency-band satellite positioning terminal antenna |
| CN113078458A (en) * | 2021-03-03 | 2021-07-06 | 电子科技大学 | Low-profile low-elevation high-gain electromagnetic dipole antenna for satellite communication |
| CN114336024A (en) * | 2021-12-29 | 2022-04-12 | 杭州电子科技大学 | Broadband circularly polarized planar antenna array applied to millimeter wave communication system |
Non-Patent Citations (4)
| Title |
|---|
| GUANFENG CUI ET AL.: ""A Circularly Polarized Millimeter-Wave Antenna with High Radiation Efficiency"", 《2022 IEEE 9TH INTERNATIONAL SYMPOSIUM ON MICROWAVE, ANTENNA, PROPAGATION AND EMC TECHNOLOGIES FOR WIRELESS COMMUNICATIONS (MAPE)》, 4 November 2022 (2022-11-04) * |
| YILONG WANG ET AL.: ""A compact and dual-band circularly polarized petal-shaped antenna with broad beamwidth for multiple global navigation satellite systems"", 《2015 IEEE MTT-S INTERNATIONAL MICROWAVE WORKSHOP SERIES ON ADVANCED MATERIALS AND PROCESSES FOR RF AND THZ APPLICATIONS (IMWS-AMP)》, 12 November 2015 (2015-11-12) * |
| 张哲豪 等: ""一种宽带低剖面极化可重构贴片天线设计"", 《第27届全国电磁兼容学术会议论文集》, 30 November 2021 (2021-11-30) * |
| 王海鹏: ""双频共口径天线的研究与设计"", 《中国优秀硕士学位论文全文数据库（电子期刊）》, 15 April 2022 (2022-04-15) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117317576A (en) * | 2023-11-29 | 2023-12-29 | 福建福大北斗通信科技有限公司 | Broadband four-arm helical antenna |
| CN117317576B (en) * | 2023-11-29 | 2024-02-06 | 福建福大北斗通信科技有限公司 | Broadband four-arm helical antenna |
| CN118073840A (en) * | 2024-04-18 | 2024-05-24 | 四川大学 | Small-size dual-frenquency band dual polarized wave filter antenna |
| CN118073840B (en) * | 2024-04-18 | 2024-07-09 | 四川大学 | Small-size dual-frenquency band dual polarized wave filter antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115441177B (en) | 2024-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11276931B2 (en) | Antenna device and antenna array | |
| US6697019B1 (en) | Low-profile dual-antenna system | |
| US5815122A (en) | Slot spiral antenna with integrated balun and feed | |
| CN115441177B (en) | Dual-band broadband vehicle-mounted antenna suitable for vehicle-mounted satellite and vehicle networking communication and communication equipment | |
| US10978812B2 (en) | Single layer shared aperture dual band antenna | |
| EP0406563A1 (en) | Broadband microstrip-fed antenna | |
| CN110112562B (en) | Small broadband differential excitation dual-mode dual-polarized base station antenna | |
| CN109860994B (en) | Planar microstrip patch antenna with broadband end-fire circular polarization characteristic | |
| CN110534892B (en) | Miniaturized inboard spiral coupling feed's slot helical antenna | |
| JP2003514422A (en) | Printed antenna | |
| US4740793A (en) | Antenna elements and arrays | |
| CN114824758A (en) | Low-profile miniaturized wide-bandwidth beam antenna | |
| Nandedkar et al. | Frequency and space diverse MIMO antenna with enhanced gain | |
| CN111682312B (en) | Asymmetrically cut patch antenna along E plane | |
| EP0955689B1 (en) | Plane antenna, and portable radio using same | |
| WO2009042393A1 (en) | Radio frequency antenna | |
| CN114843772A (en) | Dual-frequency dual-circular-polarization high-isolation Fabry-Perot cavity MIMO antenna and processing method thereof | |
| CN112635986A (en) | Circularly polarized antenna unit and circularly polarized antenna | |
| CN115911869B (en) | Millimeter wave wide bandwidth angle scanning antenna and antenna array based on three-function electric wall | |
| CN220492202U (en) | Broadband end-fire antenna applied to X frequency band | |
| CN118073840B (en) | Small-size dual-frenquency band dual polarized wave filter antenna | |
| CN213425195U (en) | Circularly polarized antenna unit and circularly polarized antenna | |
| CN112952376B (en) | Broadband millimeter wave antenna unit and antenna array | |
| CN115882187B (en) | Side-emitting omnidirectional antenna | |
| CN116683171A (en) | Broadband end-fire antenna applied to X frequency band |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |