CN109428164A - Antenna element, trailer-mounted radar and automobile - Google Patents
Antenna element, trailer-mounted radar and automobile Download PDFInfo
- Publication number
- CN109428164A CN109428164A CN201710720026.7A CN201710720026A CN109428164A CN 109428164 A CN109428164 A CN 109428164A CN 201710720026 A CN201710720026 A CN 201710720026A CN 109428164 A CN109428164 A CN 109428164A
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- array
- antenna element
- antenna
- impedance
- medium substrate
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Classifications
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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
- H01Q1/38—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
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
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- Radar Systems Or Details Thereof (AREA)
Abstract
This/to scratch nose to disclose a kind of antenna element, trailer-mounted radar and automobile, the antenna element include: medium substrate；The impedance for being formed in medium substrate side adjusts component；It is formed in medium substrate side and adjusts the array antenna that component is connected with impedance；It is formed in the back earth plate of the medium substrate other side, wherein back earth plate covers the underface that impedance adjusts component and array antenna.The impedance of the antenna element adjusts component and the same face of medium substrate is arranged in array antenna, can easily be accommodated to obtain 50 ohmages, can be conveniently applied to 24GHz trailer-mounted radar without using large-sized standard waveguide feeding interface.
Description
Technical field
It is the present invention relates to antenna technical field, in particular to a kind of antenna element, a kind of with the vehicle-mounted of the antenna element
Radar and a kind of automobile with the trailer-mounted radar.
Background technique
Microstrip antenna is widely used on various trailer-mounted radars due to having many advantages, such as low section, low cost.
In the related technology, a kind of micro-strip comb arrays antenna applied in 77GHz millimeter wave frequency band, the array day are proposed
Line is mainly made of Waveguide-microbelt transition portion, comb-like radiation array antenna and medium substrate, wherein Waveguide-microbelt transition portion
It is mainly made of waveguide short face, chip unit and WR12 standard waveguide feeding interface, and chip unit, WR12 standard waveguide
Feeding interface is in the front of medium substrate, and comb-like radiation array antenna is at the back side of medium substrate.
The application of above-mentioned micro-strip comb arrays antenna includes 77GHz trailer-mounted radar, nevertheless, being usually used in trailer-mounted radar
Millimeter wave frequency band further include 24GHz, 24GHz trailer-mounted radar is answered extensively since compared with 77GHz trailer-mounted radar, cost is relatively low for it
Vehicle for low to medium price level.Since the size of standard waveguide feeding interface is inversely proportional with millimeter-wave frequency, when above-mentioned
Micro-strip comb arrays antenna applications will lead to the standard waveguide feeding interface used when 24GHz trailer-mounted radar can not make greatly very much
With.
Summary of the invention
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, of the invention
First purpose is to propose that a kind of antenna element, the impedance adjusting component and array antenna of the antenna element are arranged in medium base
The same face of plate can easily be accommodated to obtain 50 ohmages, can be conveniently applied to 24GHz trailer-mounted radar without using big ruler
Very little standard waveguide feeding interface.
Second object of the present invention is to propose a kind of trailer-mounted radar.
Third object of the present invention is to propose a kind of automobile.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of antenna element, comprising: medium substrate；
The impedance for being formed in the medium substrate side adjusts component；Be formed in the medium substrate side and with the impedance adjusting group
The connected array antenna of part；It is formed in the back earth plate of the medium substrate other side, wherein the back earth plate covering
The impedance adjusts the underface of component and the array antenna.
Antenna element according to an embodiment of the present invention, impedance adjusts component, array antenna is formed in the same of medium substrate
Side, and impedance adjusts component and is connected with array antenna, back earth plate is in the other side of medium substrate, the covering resistance of back earth plate
The anti-underface for adjusting component, array antenna.The impedance of the antenna element adjusts component and array antenna is arranged in medium substrate
The same face, can easily be accommodated to obtain 50 ohmages, 24GHz trailer-mounted radar can be conveniently applied to without using large scale
Standard waveguide feeding interface.
According to one embodiment of present invention, it includes: starting microstrip line that the impedance, which adjusts component,；It is connected to the starting
Gradual change microstrip line between microstrip line and the array antenna.
According to one embodiment of present invention, the array antenna includes: at least one to be connected with the gradual change microstrip line
A microstrip feed line；The multiple array plasters being connected at least one described microstrip feed line.
According to one embodiment of present invention, the array plaster is rectangular patch, and the length of the rectangular patch is humorous
The long half of vibration wave, the spacing between two neighboring rectangular patch are the half of guide wavelength.
According to one embodiment of present invention, the multiple array plaster includes the first group pattern patch and the second group pattern
Patch, the first group pattern patch are the side that even number and each array plaster are connected to the microstrip feed line, institute
Stating the second group pattern patch is the other side that odd number and each array plaster are connected to the microstrip feed line, is connected to institute
It states the array plaster of microstrip feed line side and is connected to the array plaster of the microstrip feed line other side along the microstrip feed line
Length direction is arranged alternately.
According to one embodiment of present invention, width of the width of the gradual change microstrip line relative to the starting microstrip line
In being gradually reduced trend.
According to one embodiment of present invention, the dielectric constant of the medium substrate is 3.4-3.7.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of trailer-mounted radar comprising above-mentioned day
Line component.
The trailer-mounted radar of the embodiment of the present invention can be conveniently applied to the vehicle-mounted thunder of 24GHz by above-mentioned antenna element
Up to without using large-sized standard waveguide feeding interface.
In order to achieve the above objectives, invention third aspect embodiment proposes a kind of automobile comprising above-mentioned trailer-mounted radar.
The automobile of the embodiment of the present invention is connect by above-mentioned trailer-mounted radar without using large-sized standard waveguide feed
Mouthful, reduce integral vehicle cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of antenna element according to an embodiment of the invention；
Fig. 2 is the structural schematic diagram that impedance according to an embodiment of the invention adjusts component；
Fig. 3 is that the return loss simulation result of the full-wave electromagnetic emulation of antenna element according to an embodiment of the invention shows
It is intended to；
Fig. 4 is that the polarization unilateral 1 of the full-wave electromagnetic emulation of antenna element according to an embodiment of the invention and polarization are put down
The Direction Pattern Simulation result schematic diagram in face 2；
Fig. 5 is that the impedance magnitude simulation result of the full-wave electromagnetic emulation of antenna element according to an embodiment of the invention shows
It is intended to；
Fig. 6 is the full-wave electromagnetic emulation of the antenna element according to an embodiment of the invention that component is adjusted not comprising impedance
Impedance magnitude simulation result schematic diagram；
Fig. 7 is the structural schematic diagram of trailer-mounted radar according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The antenna element proposed according to embodiments of the present invention, trailer-mounted radar and automobile described with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram of antenna element according to an embodiment of the invention.
As shown in Figure 1, the antenna element can include: medium substrate 130, the impedance tune for being formed in 130 side of medium substrate
Section component 110 is formed in 130 side of medium substrate and adjusts the array antenna 120 and be formed in Jie that component 110 is connected with impedance
The back earth plate 140 of 130 other side of matter substrate.Wherein, back earth plate 140 covers impedance and adjusts component 110 and array day
The underface of line 120.
According to one embodiment of present invention, as shown in Figure 1, impedance adjusts component 110 can include: starting microstrip line 111
And the gradual change microstrip line 112 being connected between starting microstrip line 111 and array antenna 120.
Further, the width of gradual change microstrip line 112 is in be gradually reduced trend relative to the width of starting microstrip line 111.
According to one embodiment of present invention, as shown in Figure 1, array antenna 120 includes: to be connected with gradual change microstrip line 112
At least one microstrip feed line 121 and multiple array plasters 122 for being connected at least one microstrip feed line 121.
Further, array plaster 122 can be rectangular patch, and the length of rectangular patch can be two points of resonance wavelength
One of, the spacing between two neighboring rectangular patch can be the half of guide wavelength.
Further, multiple array plasters 122 include the first group pattern patch and the second group pattern patch, the first group pattern
Patch can be for even number and each array plaster 122 is connected to the side of microstrip feed line 121, and the second group pattern patch can be
Odd number and each array plaster 122 are connected to the other side of microstrip feed line 121, are connected to the array of 121 side of microstrip feed line
Patch 122 and the array plaster 122 for being connected to 121 other side of microstrip feed line are arranged alternately along the length direction of microstrip feed line 121.
Wherein, the number of multiple array plasters can be demarcated according to the actual situation, for example, multiple array plasters 122 can be 11
Rectangular patch, wherein the first group pattern patch may include 6 rectangular patches, and the second group pattern patch may include 5 rectangle patches
Piece.
Specifically, as shown in Figure 1, the 120 of impedance adjusting component 110, array antenna are being arranged in medium substrate 130 just
Face, back earth plate 140 are arranged in the back side of medium substrate 130, and cover impedance adjust component 110, array antenna 120
Underface.
Wherein, it includes starting microstrip line 111 and gradual change microstrip line 112, gradual change microstrip line 112 1 that impedance, which adjusts component 110,
End is connected with starting microstrip line 111, and the other end is connected with array antenna 120.
Array antenna 120 includes a microstrip feed line 121 and multiple array plasters 122, the number of specific array plaster 122
Can determine according to actual needs, for example, 11, it is two groups that 11 array plasters 122, which are divided to, and the first group pattern patch may include 6
Array plaster 122, the second group pattern patch may include 5 array plasters 122,6 array plasters 122 of the first group pattern patch
It is consecutively connected to the side of microstrip feed line 121,5 array plasters 122 of the second group pattern patch are consecutively connected to microstrip feed line
121 other side.The structure of each array plaster 122 is identical, can be the identical rectangular patch of size, the length of the rectangular patch
Degree is Lc, and the space D c for being specifically as follows the half of resonance wavelength, width Wc, and adjacent rectangular patch can be
Half of guide wavelength or so.
As shown in Fig. 2, one end connection starting microstrip line 111 of gradual change microstrip line 112, the other end of gradual change microstrip line 112
Connect microstrip feed line 121.Originate a length of Lt1, the width Wt of microstrip line 111, a length of Lt2 of gradual change microstrip line 112, gradual change micro-strip
The width of line 112 is gradually smaller, and one end most width being connected with starting microstrip line 111 is Wt, the one end being connected with microstrip feed line 121
It is most narrow and with microstrip feed line 121 it is of same size be Wcm, i.e., gradual change microstrip line 112 be a trapezoidal gradual change microstrip line.Gradual change micro-strip
Line 112 arrives a length of Lcm of the microstrip feed line 121 of nearest rectangular patch.
In practical applications, it is designed according to length, the width etc. to all parts such as working frequency of antenna, as
One specific example, when the working frequency of the antenna element is 24GHz, the length Lt1 of starting microstrip line 111 is about 3.2mm,
The width Wt for originating microstrip line 111 is about 0.7mm, and the length Lt2 of gradual change microstrip line 112 is about 1mm, the width of microstrip feed line 121
Spending Wcm is about 0.41mm, and the length Lc of rectangular patch is about 3.2mm, width Wc is about 1.3mm, the spacing of adjacent rectangle patch
Dc is about 3.8mm, from the gradual change microstrip line 112 that impedance adjusts the nearest rectangular patch of component 110 and impedance adjusting component 110
The spacing Lcm of end is 2.9mm, in addition, the dielectric constant of medium substrate 130 can be 3.4-3.7, thickness can be
0.508mm, the deposited copper thickness that impedance adjusts component 110, array antenna 120 and back earth plate 140 is about 40 μm.
Then, it is emulated using antenna element of the full-wave electromagnetic emulation mode to the specific example.As shown in figure 3, with
Co-planar waveguide component is the return loss simulation result of feed port are as follows: bandwidth of the return loss less than -10dB is about 4.7GHz,
Corresponding frequency band is about 20GHz-24.7GHz.As shown in figure 4, with the polarization plane 1 of 24.15GHz center frequency point simulation result
With the directional diagram of polarization plane 2 are as follows: the beam angle of polarization plane 1 is 85 °, and the beam angle of polarization plane 2 is 15 °, minor lobe
For -13.1dB.
As shown in figure 5, the simulation result of the impedance magnitude to the antenna element are as follows: the impedance magnitude wave of 20GHz-24GHz
The impedance magnitude fluctuation range that dynamic range is about 38 Ω -73 Ω, 24GHz-24.3GHz is about 50 Ω -54 Ω.And work as no impedance
When adjusting component 110, i.e. Wcm=Wt is about 0.7mm, as shown in fig. 6, the simulation result of the impedance magnitude to antenna element (returns
Bandwidth of the wave loss less than -10dB is about 4.5GHz) are as follows: the impedance magnitude fluctuation range of 20GHz-24GHz is about 32 Ω -82
The impedance magnitude fluctuation range of Ω, 24GHz-24.3GHz are about 61 Ω -38 Ω.
As the above analysis, 24GHz-24.3GHz fluctuation range very little can be obtained by adjusting component by setting impedance
50 ohmages, impedance fluctuations range is small, radar signal is more stable.
Therefore, the impedance of antenna element of the invention adjusts component and the same face of medium substrate is arranged in array antenna,
It can easily be accommodated to obtain 50 ohmages, 24GHz trailer-mounted radar can be conveniently applied to without using large-sized standard wave
Lead feeding interface.
In conclusion antenna element according to an embodiment of the present invention, impedance adjusts component, array antenna is formed in medium base
The same side of plate, and impedance adjusts component and is connected with array antenna, back earth plate is in the other side of medium substrate, back ground connection
Plate covers the underface that impedance adjusts component, array antenna.The impedance of the antenna element adjusts component and array antenna setting exists
The same face of medium substrate can easily be accommodated to obtain 50 ohmages, can be conveniently applied to 24GHz trailer-mounted radar without making
With large-sized standard waveguide feeding interface.
In addition, the embodiment of the present invention also proposed a kind of trailer-mounted radar comprising above-mentioned antenna element.
Shown in Fig. 7, which may include transmitting antenna 10, receiving antenna 20, antenna house 30, transmitter 40, receives
Machine 50, signal processor 60 and interface equipment 70.Wherein, when signal emits, transmitting antenna 10 and transmitter 40 are connected, hair
It penetrates signal and reaches detected material through antenna house 30 and generate and reflect signal；When receiving the reflection signal for penetrating antenna house 30, connect
It receives antenna 20 and receiver 50 is connected, signal is laggard by processing such as 50 High frequency amplification of receiver, mixing, filtering, intermediate frequency amplifications
Enter signal processor 60, detection signal is generated after the simulation of signal processor 60, Digital Signal Processing, detection signal passes through
Interface equipment 70 is sent to other devices.
It should be noted that above-mentioned transmitting antenna 10 and receiving antenna 20 can be antenna element proposed by the present invention.
The trailer-mounted radar of the embodiment of the present invention can be conveniently applied to the vehicle-mounted thunder of 24GHz by above-mentioned antenna element
Up to without using large-sized standard waveguide feeding interface.
In addition, the embodiment of the present invention also proposed a kind of automobile comprising above-mentioned trailer-mounted radar.
The automobile of the embodiment of the present invention is connect by above-mentioned trailer-mounted radar without using large-sized standard waveguide feed
Mouthful, reduce integral vehicle cost.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (9)
1. a kind of antenna element characterized by comprising
Medium substrate；
The impedance for being formed in the medium substrate side adjusts component；
It is formed in the medium substrate side and adjusts the array antenna that component is connected with the impedance；
It is formed in the back earth plate of the medium substrate other side, wherein the back earth plate covers the impedance and adjusts
The underface of component and the array antenna.
2. antenna element as described in claim 1, which is characterized in that the impedance adjusts component and includes:
Originate microstrip line；
The gradual change microstrip line being connected between the starting microstrip line and the array antenna.
3. antenna element as claimed in claim 2, which is characterized in that the array antenna includes:
At least one microstrip feed line being connected with the gradual change microstrip line；
The multiple array plasters being connected at least one described microstrip feed line.
4. antenna element as claimed in claim 3, which is characterized in that the array plaster is rectangular patch, the rectangle patch
The length of piece is the half of resonance wavelength, and the spacing between two neighboring rectangular patch is the half of guide wavelength.
5. antenna element as claimed in claim 3, which is characterized in that the multiple array plaster includes the first group pattern patch
With the second group pattern patch, the first group pattern patch is even number and each array plaster is connected to the micro-strip feedback
The side of line, the second group pattern patch is odd number and each array plaster is connected to the another of the microstrip feed line
Side is connected to the array plaster of the microstrip feed line side and is connected to the array plaster of the microstrip feed line other side described in
The length direction of microstrip feed line is arranged alternately.
6. antenna element as claimed in claim 2, which is characterized in that the width of the gradual change microstrip line is relative to the starting
The width of microstrip line is in be gradually reduced trend.
7. antenna element as described in claim 1, which is characterized in that the dielectric constant of the medium substrate is 3.4-3.7.
8. a kind of trailer-mounted radar, which is characterized in that including such as described in any item antenna elements of claim 1-7.
9. a kind of automobile, which is characterized in that including trailer-mounted radar as claimed in claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710720026.7A CN109428164A (en) | 2017-08-21 | 2017-08-21 | Antenna element, trailer-mounted radar and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710720026.7A CN109428164A (en) | 2017-08-21 | 2017-08-21 | Antenna element, trailer-mounted radar and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109428164A true CN109428164A (en) | 2019-03-05 |
Family
ID=65498954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710720026.7A Pending CN109428164A (en) | 2017-08-21 | 2017-08-21 | Antenna element, trailer-mounted radar and automobile |
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Cited By (2)
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| CN110994161A (en) * | 2019-12-31 | 2020-04-10 | 电子科技大学 | Asymmetric broadband dipole antenna for borehole radar |
| CN117060049A (en) * | 2023-09-13 | 2023-11-14 | 南京林业大学 | Design method of comb-shaped microstrip antenna of vehicle-mounted millimeter wave radar |
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Application publication date: 20190305 |