CN109428166A - Antenna element, trailer-mounted radar and automobile - Google Patents
Antenna element, trailer-mounted radar and automobile Download PDFInfo
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- CN109428166A CN109428166A CN201710720054.9A CN201710720054A CN109428166A CN 109428166 A CN109428166 A CN 109428166A CN 201710720054 A CN201710720054 A CN 201710720054A CN 109428166 A CN109428166 A CN 109428166A
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- earth plate
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- medium 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
- H01Q1/36—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
- 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
- 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
- H01Q21/065—Patch antenna array
Abstract
The invention discloses a kind of antenna element, trailer-mounted radar and automobile, the antenna element includes: medium substrate；It is formed in the co-planar waveguide component of medium substrate side；It is formed in medium substrate side and the together connected array antenna of surface wave guide assembly, array antenna includes at least one microstrip feed line, multiple array plasters for being connected at least one microstrip feed line；It is formed in the back earth plate of the medium substrate other side, wherein the underface of back earth plate covering co-planar waveguide component and array antenna.The same face of medium substrate is arranged in the co-planar waveguide component and array antenna of the antenna element, it is easy to be connected with the tiny pin of MMIC, thus it is easy to be arranged in MMIC the same face of medium substrate, it advantageously reduces the usable floor area of medium substrate and reduces the overall price of trailer-mounted radar, and without using the hardware containing wave-guide cavity wave, radar total quality can be reduced.
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 target of the micro-strip comb arrays antenna is vehicle-mounted millimeter wave radar, however, most currently on the market
24GHz or 77GHz frequency range vehicle-mounted millimeter wave radar, radar signal transceiver (transmitter and receiver) all use monolithic
Type micro-wave integrated circuit MMIC (Monolithic Microwave Integrated Circuit, the integrated electricity of single chip microwave
Road), and (width or line footpath are usually difficult to the WR12 standard wave directly with microstrip antenna in 0.3mm or less) to the tiny pin of MMIC
Lead feeding interface (3.1mm, wide about 1.55mm are about in WR12 wave-guide cavity wave) connection.Therefore, MMIC needs to be arranged another piece together
Class medium substrate (MMIC and array antenna are needed using Homogeneous media substrate), by micro- on another piece of Homogeneous media substrate
Band line and Waveguide-microbelt transition portion are presented by the WR12 standard waveguide of WR12 metal waveguide cavity and micro-strip comb arrays antenna
Electrical interface is connected.
It is well known that the unit price of millimeter wave dielectric substrate is much higher than low frequency PCB (Printed Circuit
Board, printed circuit board) medium substrate, the area that millimeter wave dielectric substrate uses is bigger, and the overall price of radar is higher.Cause
This, above-mentioned micro-strip comb arrays antenna will lead to using WR12 standard waveguide feeding interface and at least use two pieces of millimeter wave dielectric bases
Plate, i.e. millimeter wave dielectric substrate area increase, radar overall price increases, and are unable to satisfy vehicle-mounted millimeter wave increasingly with keen competition
The price demand in radar market.Also, above-mentioned micro-strip comb arrays antenna using WR12 standard waveguide feeding interface need using
Metallic waveguide, metal waveguide flange or other contain the hardware of wave-guide cavity wave, to connect the medium base of above-mentioned MMIC
Plate causes vehicle-mounted millimeter wave radar overall weight to increase, is not able to satisfy the demand of automotive light weight technology.
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 co-planar waveguide component and array antenna of the antenna element are arranged in medium base
The same face of plate is easy to be connected with the tiny pin of MMIC, thus is easy to be arranged in MMIC the same face of medium substrate, favorably
In reduce millimeter wave dielectric substrate usable floor area and reduce trailer-mounted radar overall price, simultaneously because antenna element be easy to
The tiny pin of MMIC connects, thus without using the hardware containing wave-guide cavity wave, radar total quality can be reduced.
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；
It is formed in the co-planar waveguide component of the medium substrate side；Be formed in the medium substrate side and with the co-planar waveguide group
The connected array antenna of part, the array antenna include at least one microstrip feed line, are connected at least one described microstrip feed line
Multiple array plasters, wherein multiple array plasters are divided into two groups, and first group is consecutively connected to the one of the microstrip feed line
Side, second group of other side for being consecutively connected to the microstrip feed line, the spacing between two neighboring array plaster is guide wavelength
Half, and the spacing in every group pattern patch between two neighboring array plaster be guide wavelength；It is formed in and is given an account of
The back earth plate of the matter substrate other side, wherein the back earth plate covers the co-planar waveguide component and the array day
The underface of line.
Antenna element according to an embodiment of the present invention, co-planar waveguide component and array antenna are formed in the same of medium substrate
Side, and surface wave guide assembly is connected array antenna together, back earth plate is in the other side of medium substrate, and the covering of back earth plate is altogether
The underface of surface wave guide assembly and array antenna, wherein array antenna includes at least one microstrip feed line and at least one micro-strip
The connected multiple array plasters of feeder line, multiple array plasters are divided into two groups, first group of side for being consecutively connected to microstrip feed line, the
Two groups of other sides for being consecutively connected to microstrip feed line, the spacing between two neighboring array plaster be guide wavelength two/
One, and the spacing in every group pattern patch between two neighboring array plaster is guide wavelength.The co-planar waveguide of the antenna element
The same face of medium substrate is arranged in component and array antenna, is easy to be connected with the tiny pin of MMIC, thus is easy to and MMIC
The same face of medium substrate is set, the usable floor area of millimeter wave dielectric substrate is advantageously reduced and reduces the entirety of trailer-mounted radar
Price, simultaneously because antenna element is easy to connect with the tiny pin of MMIC, thus without using the metal containing wave-guide cavity wave
Structural member can reduce radar total quality.
In addition, the antenna element proposed according to that above embodiment of the present invention can also have the following additional technical features:
According to one embodiment of present invention, the co-planar waveguide component includes: intermediate microstrip line, the intermediate microstrip line
It is connected with the microstrip feed line；The first earth plate and the second earth plate positioned at the intermediate microstrip line two sides.
According to one embodiment of present invention, first earth plate and the second earth plate are metal plate, and described first connects
It is respectively provided with multiple plated through-holes on floor and the second earth plate, the plated through-hole is used for first earth plate and the
Two earth plates are connected to form the barrier shield of the co-planar waveguide component with the back earth plate respectively.
According to one embodiment of present invention, the intermediate microstrip line and first earth plate have first gap, institute
Stating has Second gap, the width of the first gap and the Second gap between intermediate microstrip line and second earth plate
It is identical.
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.
According to one embodiment of present invention, described first group is even number array plaster, and described second group is odd number
Array plaster, the array plaster for being connected to the microstrip feed line side and the array plaster for being connected to the microstrip feed line other side
Length direction along the microstrip feed line is arranged alternately.
According to one embodiment of present invention, the dielectric constant of the medium substrate is 3.4-3.7.
According to one embodiment of present invention, the intermediate microstrip line includes first to third section, wherein described first to
The width of third section gradually increases, and the third section is connected with the array antenna.
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 not only contributes to reduce millimeter wave dielectric base by above-mentioned antenna element
The usable floor area of plate and the overall price for reducing trailer-mounted radar, and without using the hardware containing wave-guide cavity wave, it can
To reduce radar total quality.
In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of automobile comprising above-mentioned vehicle-mounted thunder
It reaches.
The automobile of the embodiment of the present invention can reduce the overall price of automobile by above-mentioned trailer-mounted radar, while can drop
The complete vehicle quality of low automobile.
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 of co-planar waveguide component according to an embodiment of the invention；
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 the structural schematic diagram of intermediate microstrip line according to an embodiment of the invention；
Fig. 6 is that 1 directional diagram of polarization plane of the full-wave electromagnetic emulation of antenna element according to an embodiment of the invention is imitative
True result schematic diagram；
Fig. 7 is 1 directional diagram of polarization plane of the full-wave electromagnetic emulation of antenna element in accordance with another embodiment of the present invention
Simulation result schematic diagram；
Fig. 8 is the structural schematic diagram of trailer-mounted radar according to an embodiment of the invention；And
Fig. 9 is the schematic diagram that antenna element according to an embodiment of the invention is used for side back sight trailer-mounted radar.
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 of the embodiment of the present invention can include: medium substrate 130 is formed in medium substrate 130
The co-planar waveguide component 110 of side is formed in 130 side of medium substrate and the together connected array antenna of surface wave guide assembly 110
120 and it is formed in the back earth plate 140 of 130 other side of medium substrate.Wherein, array antenna 120 includes at least one micro-strip
Feeder line 121, the multiple array plasters 122 being connected at least one microstrip feed line 121, wherein it is two that multiple array plasters 122, which are divided to,
Group, first group of 122a are consecutively connected to the side of microstrip feed line 121, and second group of 122b is consecutively connected to the another of microstrip feed line 121
Side, the spacing between two neighboring array plaster 122 are the half of guide wavelength, and phase in every group pattern patch 122
Spacing between adjacent two array plasters 122 is guide wavelength.Back earth plate 140 covers co-planar waveguide component 110 and array
The underface of antenna 120.
According to one embodiment of present invention, array plaster 122 can be rectangular patch, and the length of rectangular patch 122 is
The half of resonance wavelength.
Further, first group of 122a can be even number array plaster 122, and second group of 122b can be odd number array
Patch 122, the array plaster 122 for being connected to 121 side of microstrip feed line and the array plaster for being connected to 121 other side of microstrip feed line
122 are arranged alternately along the length direction of microstrip feed line 121.Wherein, the number of this multiple column patch can carry out according to the actual situation
Calibration, for example, multiple array plasters 122 can be 11 rectangular patches, wherein first group of 122a may include 6 rectangular patches, the
Two groups of 122b may include 5 rectangular patches.
According to one embodiment of present invention, as shown in Figure 1, co-planar waveguide component 110 can include: intermediate microstrip line 111
Be located at intermediate 111 two sides of microstrip line the first earth plate 112 and the second earth plate 113, wherein intermediate microstrip line 111 with it is micro-
Ribbon feeder 121 is connected.
Further, intermediate microstrip line 111 and the first earth plate 112 have first gap, intermediate microstrip line 111 and second
There is Second gap between earth plate 113, first gap and Second gap it is of same size.
In an embodiment of the present invention, the first earth plate 112 and the second earth plate 113 are metal plate, the first earth plate 112
Be respectively provided with multiple plated through-holes 114 on the second earth plate 113, plated through-hole 114 is used for the first earth plate 112 and the
Two earth plates 113 are connected to form the barrier shield of co-planar waveguide component 110 with back earth plate 140 respectively.
Specifically, as shown in Figure 1, co-planar waveguide component 110 and array antenna 120 may be provided at medium substrate 130
Front, the back side of medium substrate 130 is arranged in back earth plate 140, and covers co-planar waveguide component 110 and array antenna 120
Underface.
Wherein, co-planar waveguide component 110 includes intermediate microstrip line 111 and connects positioned at the first of intermediate 111 two sides of microstrip line
It is several on floor 112, the second earth plate 113 (also referred to as front earth plate) and the first earth plate 112 and the second earth plate 113
Plated through-hole 114.As shown in Fig. 2, there is width between the side and the first ipsilateral earth plate 112 at 111 edge of intermediate microstrip line
Uniform gap Sc is spent, also has width equal between the other side at intermediate 111 edge of microstrip line and the second ipsilateral earth plate 113
Even gap Sc.Plated through-hole 114 (blind hole) is respectively by the first earth plate 112 and the second earth plate 113 and back earth plate 140
It connects to form the barrier shield of co-planar waveguide component 110.
Array antenna 120 includes a microstrip feed line 121 and multiple array plasters 122, and the number of specific array plaster can
Determine according to actual needs, for example, 11, it is two groups that 11 array plasters 122, which are divided to, and first group of 122a may include 6 array patches
Piece 122, second group of 122b may include 5 array plasters 122, and 6 array plasters 122 of first group of 122a are consecutively connected to micro-strip
The side of feeder line 121,5 array plasters 122 of second group of 122b are consecutively connected to the other side of microstrip feed line 121.Wherein, micro-
One end of the intermediate microstrip line 111 in surface wave guide assembly 110 together of ribbon feeder 121 is connected, in practical applications, intermediate microstrip line
111 other end and the pin of MMIC are connected directly, and it is Wcm that intermediate microstrip line 111 is of same size with microstrip feed line 121.
The structure of each array plaster 122 is identical, can be the identical rectangular patch of size, and the length of the rectangular patch is Lc, specifically
It can be the half of resonance wavelength, width is Wc (Wc=Wc1=Wc2), and the space D c of adjacent rectangular patch can
Think the half or so of guide wavelength, and the space D p of rectangular patch adjacent in each group can be guide wavelength, i.e.,
Dp=2Dc.
In practical applications, it is designed according to length, the width etc. to all parts such as working frequency of antenna, as
A specific example of the invention, when the working frequency of the antenna element is 24GHz, the two sides at intermediate 111 edge of microstrip line
Gap Sc between ipsilateral the first earth plate 112 and the second earth plate 113 is about 0.15mm, microstrip feed line 121 and centre
The width Wcm of microstrip line 111 is about 0.7mm, and the length Lc of rectangular patch is about 3.3mm, width Wc=Wc1=Wc2 is about
1.3mm, adjacent rectangle patch space D c be about the space D p=2*Dc of rectangular patch adjacent in 3.75mm and each group
=7.5mm.In addition, the aperture of plated through-hole 114 is about 0.34mm, the dielectric constant of medium substrate 130 can be 3.4-3.7,
Thickness can be 0.508mm, and the deposited copper thickness of co-planar waveguide component 110, array antenna 120 and back earth plate 140 is about 40 μ
m.In addition, distance Dp2 (about 7mm) and the of the second group pattern patch 122b along microstrip feed line 121 to co-planar waveguide component 110
One group pattern patch 122a along microstrip feed line 121 to co-planar waveguide component 110 distance Dp1 (about 3.25mm) range difference about
For the half of guide wavelength.
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 4.5GHz,
Corresponding frequency band is about 20GHz-24.5GHz.As shown in figure 4, with the polarization plane 1 of 24.14GHz center frequency point simulation result
With the directional diagram of polarization plane 2 are as follows: the beam angle of polarization plane 1 is 77.5 °, the beam angle of polarization plane 2 is 15.2 °,
Minor lobe is -13.5dB.
In addition, according to one embodiment of present invention, as shown in figure 5, intermediate microstrip line 111 may include first to third
Section, wherein first to third section width gradually increases, and third section is connected with array antenna 120.
Specifically, the width of microstrip feed line 121 may not just can satisfy the pin widths of MMIC in actual design
The requirement of (0.3mm or less), for example, the width of microstrip feed line 121 reaches 0.7mm in the above-described embodiments, so can incite somebody to action at this time
Intermediate microstrip line 111 carries out subsection setup.For example, can divide intermediate microstrip line 111 is three sections, respectively first segment 111a,
Two sections of 111b and third section 111c, wherein the width Wcm1 of first segment 111a is most wide, and such as 0.7mm, which can directly be presented with micro-strip
Line 121 is connected, and the width Wcm2 width of second segment 111b reduces, and the width Wcm3 of such as 0.55mm, third section 111c are most narrow, such as
0.25mm, this section can directly be connected with the tiny pin of MMIC, by the subsection setup, be easy to the tiny pin phase with MMIC
Even.
Therefore, the same face of medium substrate is arranged in the co-planar waveguide component of antenna element of the invention and array antenna,
It is easy to be connected with the tiny pin of MMIC, thus is easy to be arranged in MMIC the same face of medium substrate, advantageously reduces millimeter
The usable floor area of wave medium substrate and the overall price for reducing trailer-mounted radar, simultaneously because antenna element is easy to tiny with MMIC
Pin connection, thus without using the hardware containing wave-guide cavity wave, radar total quality can be reduced.
It, in an embodiment of the present invention, can also be by the first group pattern patch in order to improve the performance of the antenna element
122a departs slightly from co-planar waveguide component 110 and carries out position setting, for example, Dp1 is increased 0.2mm, and the second group pattern is pasted
Piece 122b is slightly closer to co-planar waveguide component 110 and carries out position setting, for example, Dp2 is reduced 0.2mm, then, Dp2- at this time
Dp1=Dc-0.4mm=3.35mm, less than the half of guide wavelength, at this point, using full-wave electromagnetic emulation mode to the tool
The exemplary antenna element of body is emulated, and obtains the directional diagram of polarization plane 1 as shown in fig. 6, after adjusting, polarization plane 1
Directional diagram (in figure shown in dotted line) the negative semiaxis of angle coordinate axis amplitude compared to adjust before directional diagram increase (for example,-
At 50 °, increase 0.8dB), and the amplitude of the positive axis of angle coordinate axis compared to adjust before directional diagram reduce (for example,
At 50 °, reduce 0.9dB).
Furthermore it is also possible to pass through the width Wc1 and the second group pattern that adjust rectangular patch in the first group pattern patch 122a
The ratio of the width Wc2 of rectangular patch in patch 122b, come further adjust antenna element polarization plane 1 directional diagram.Example
Such as, when antenna element uses Dp2-Dp1=Dc-0.4mm=3.35mm, Wc1=1.3mm and Wc2=0.6*Wc1=0.6*
The size of 1.3mm=0.78mm carries out full-wave electromagnetic emulation, obtains the directional diagram of polarization plane 1 as shown in fig. 7, after adjusting,
The directional diagram (in figure shown in dotted line) of polarization plane 1 increases in the amplitude of the negative semiaxis of angle coordinate axis compared to the directional diagram before adjusting
(for example, increasing 1.4dB at -50 °) greatly, and subtract in the amplitude of the positive axis of angle coordinate axis compared to the front direction figure adjusted
Small (for example, reducing 1.2dB at 50 °).
As shown in figure 9, will include that the trailer-mounted radar of antenna element of the invention is applied to the rear portion of automobile 1, with detection
The passing maneuver of automobile side rear automobile 2 and 3, and car assisted 1 driver to be to reduce the potential collision risk of lane change,
In, after 0 °~-50 ° irradiation automobiles 1 of negative semiaxis that trailer-mounted radar passes through the directional diagram of the polarization plane 1 of above-mentioned antenna element
Square region, and pass through the side of 0 °~50 ° irradiation automobiles 1 of the positive axis of the directional diagram of the polarization plane of above-mentioned antenna element 1
Region.Since radar signal will decay with the increase of detecting distance, trailer-mounted radar detect automobile 1 farther out after
The automobile 2 in square region, the automobile 3 compared to detection in the relatively nearside side region of automobile 1, needs bigger directional diagram amplitude to obtain
Bigger radar signal, that is, the amplitude of directional diagram (in Fig. 6 or Fig. 7 shown in dotted line) after adjusting in the negative semiaxis of angle coordinate axis
Compared to the increase of the directional diagram before adjusting, be conducive to the detection application of trailer-mounted radar.And the directional diagram after adjusting is (in Fig. 6 or Fig. 7
Shown in dotted line) angle coordinate axis positive axis amplitude compared to adjust before directional diagram reduction, be conducive to adjust vehicle-mounted thunder
Up to detection in the directional diagram amplitude of the automobile 3 in the relatively nearside side region of automobile 1, radar is caused to be visited because radar signal is saturated to reduce
A possibility that surveying performance degradation.
Therefore, as shown in Figures 6 and 7, the directional diagram after adjusting is before the amplitude of the negative semiaxis of angle coordinate axis is compared and adjusted
Directional diagram increase and adjust after directional diagram angle coordinate axis positive axis amplitude compared to adjust before directional diagram
Reduction, be conducive to the application of above-mentioned side back sight trailer-mounted radar.
In conclusion antenna element according to an embodiment of the present invention, co-planar waveguide component and array antenna are formed in medium
The same side of substrate, and surface wave guide assembly is connected array antenna together, back earth plate connects at the other side of medium substrate, back
Floor covering co-planar waveguide component and array antenna underface, wherein array antenna include at least one microstrip feed line, with extremely
The connected multiple array plasters of a few microstrip feed line, multiple array plasters are divided into two groups, and first group is consecutively connected to micro-strip feedback
The side of line, second group of other side for being consecutively connected to microstrip feed line, the spacing between two neighboring array plaster is guided wave wave
Long half, and the spacing in every group pattern patch between two neighboring array plaster is guide wavelength.The antenna element
Co-planar waveguide component and array antenna the same face of medium substrate is set, be easy to be connected with the tiny pin of MMIC, thus
It is easy to be arranged in MMIC the same face of medium substrate, advantageously reduce the usable floor area of millimeter wave dielectric substrate and reduces vehicle-mounted
The overall price of radar, simultaneously because antenna element is easy to connect with the tiny pin of MMIC, thus without using containing waveguide
The hardware of cavity can reduce radar total quality.
In addition, the embodiment of the present invention also proposed a kind of trailer-mounted radar comprising above-mentioned antenna element.
As shown in figure 8, the trailer-mounted radar may include transmitting antenna 10, receiving antenna 20, antenna house 30, transmitter 40, connect
Receipts machine 50, signal processor 60 and interface equipment 70.Wherein, when signal emits, transmitting antenna 10 and transmitter 40 are connected,
Emit signal and reaches detected material generation reflection signal through antenna house 30；When receiving the reflection signal for penetrating antenna house 30,
Receiving antenna 20 and receiver 50 are connected, and signal is after the processing such as 50 High frequency amplification of receiver, mixing, filtering, intermediate frequency amplification
Entering signal processor 60, generates detection signal after the simulation of signal processor 60, Digital Signal Processing, and detection signal is logical
It crosses interface equipment 70 and 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 not only contributes to reduce millimeter medium substrate by above-mentioned antenna element
Usable floor area and reduce the overall price of trailer-mounted radar, can be with and without using the hardware containing wave-guide cavity wave
Reduce radar total quality.
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 can reduce the overall price of automobile by above-mentioned trailer-mounted radar, while can drop
The complete vehicle quality of low automobile.
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 (10)
1. a kind of antenna element characterized by comprising
Medium substrate；
It is formed in the co-planar waveguide component of the medium substrate side；
The array antenna for being formed in the medium substrate side and being connected with the co-planar waveguide component, the array antenna include
At least one microstrip feed line, the multiple array plasters being connected at least one described microstrip feed line, wherein multiple array patches
Piece is divided into two groups, and first group of side for being consecutively connected to the microstrip feed line, second group is consecutively connected to the microstrip feed line
The other side, the spacing between two neighboring array plaster are the half of guide wavelength, and adjacent two in every group pattern patch
Spacing between a array plaster is guide wavelength；
It is formed in the back earth plate of the medium substrate other side, wherein the back earth plate covers the co-planar waveguide
The underface of component and the array antenna.
2. antenna element as described in claim 1, which is characterized in that the co-planar waveguide component includes:
Intermediate microstrip line, the intermediate microstrip line are connected with the microstrip feed line；
The first earth plate and the second earth plate positioned at the intermediate microstrip line two sides.
3. antenna element as claimed in claim 2, which is characterized in that first earth plate and the second earth plate are metal
Plate, is respectively provided with multiple plated through-holes on first earth plate and the second earth plate, and the plated through-hole will be for will be described
First earth plate and the second earth plate are connected to form the barrier shield of the co-planar waveguide component with the back earth plate respectively.
4. antenna element as claimed in claim 2, which is characterized in that the intermediate microstrip line has with first earth plate
First gap has Second gap, the first gap and described the between the intermediate microstrip line and second earth plate
Two gaps it is of same size.
5. antenna element according to any one of claims 1-4, which is characterized in that the array plaster is rectangular patch, institute
The length for stating rectangular patch is the half of resonance wavelength.
6. antenna element as described in claim 1, which is characterized in that described first group is even number array plaster, described the
Two groups are odd number array plaster, are connected to the array plaster of the microstrip feed line side and to be connected to the microstrip feed line another
The array plaster of side is arranged alternately along the length direction of the microstrip feed line.
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. antenna element as claimed in claim 2, which is characterized in that the intermediate microstrip line includes first to third section,
In, described first to third section width gradually increases, and the third section is connected with the array antenna.
9. a kind of trailer-mounted radar, which is characterized in that including such as described in any item antenna elements of claim 1-8.
10. a kind of automobile, which is characterized in that including trailer-mounted radar as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710720054.9A CN109428166A (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 |
|---|---|---|---|
| CN201710720054.9A CN109428166A (en) | 2017-08-21 | 2017-08-21 | Antenna element, trailer-mounted radar and automobile |
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| Publication Number | Publication Date |
|---|---|
| CN109428166A true CN109428166A (en) | 2019-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710720054.9A Pending CN109428166A (en) | 2017-08-21 | 2017-08-21 | Antenna element, trailer-mounted radar and automobile |
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| CN (1) | CN109428166A (en) |
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| CN114063014A (en) * | 2020-07-29 | 2022-02-18 | 华为技术有限公司 | Radar device and working equipment |
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