CN208111679U - A kind of PCB antenna and millimetre-wave radar - Google Patents
A kind of PCB antenna and millimetre-wave radar Download PDFInfo
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- CN208111679U CN208111679U CN201820594013.XU CN201820594013U CN208111679U CN 208111679 U CN208111679 U CN 208111679U CN 201820594013 U CN201820594013 U CN 201820594013U CN 208111679 U CN208111679 U CN 208111679U
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Abstract
The utility model discloses a kind of PCB antenna and millimetre-wave radar, PCB antenna includes：Metal floor, high frequency laminate and aerial array, aerial array include the radiating element of the microstrip transmission line and preset quantity in vertical bar shape, and preset quantity is determined according to the system gain of main equipment where PCB antenna；Metal floor is located at the bottom of high frequency laminate, aerial array is located at the top of high frequency laminate, radiating element is spaced apart since the signal output end of microstrip transmission line along microstrip transmission line, interval between adjacent radiation unit is equal, and two in each radiating element couple there are gap and symmetrical about microstrip transmission line between radiation fin and microstrip transmission line.Compared with prior art, PCB antenna disclosed in the utility model reduces the non-linear mutual interference between radiating element and microstrip transmission line, improves the volume production consistency of PCB antenna.
Description
Technical field
The utility model relates to antenna technical fields, more specifically, being related to a kind of PCB antenna and millimetre-wave radar.
Background technique
In recent years, ADAS (Advanced Driver Assistant Systems, advanced driving assistance system) is used as one
The vehicle-mounted active safety technologies of kind, since it can prevent trouble before it happens many unexpected traffic accidents, the attention by countries in the world.
ADAS system is to obtain ambient condition information based on the various sensors on vehicle, obtains map datum based on navigation system, so
Operation and analysis are carried out afterwards, allow driver to know the danger being likely encountered in advance, and then improve the comfort and peace of vehicle driving
Quan Xing.Therefore, for ADAS system, identify that the obstacle information of vehicle periphery is just particularly important.And millimeter wave thunder
Up to due to having the characteristics that big bandwidth, penetration capacity be strong, good anti-Stealth Fighter, it is increasingly becoming in ADAS system for identification
The standard configuration sensor of obstacle information.
Currently, being by PCB (Printed Circuit during millimetre-wave radar cognitive disorders object information
Board, printed circuit board) antenna realizes its transmitting and receive capabilities.Wherein, PCB antenna includes multiple biographies in the prior art
Defeated-radiating element includes microstrip transmission line and radiating element, micro-strip transmission in entire PCB antenna in each transmission-radiating element
Line and radiating element are alternately placed.
Existing PCB antenna has following problem：There are larger between radiating element and microstrip transmission line in existing PCB antenna
Non-linear mutual interference, lead under different frequency that phase pushing figure differs greatly, the main lobe directive property of directional diagram differs greatly and spoke
The impedance frequency width for penetrating unit is smaller, and then causes with the increase of transmission-radiating element quantity, and Antenna Operation bandwidth is therewith
Decline more, this will be so that the main equipments such as millimetre-wave radar be to meet bandwidth of operation and have to reduce transmission-radiation in PCB antenna
The quantity of unit, the negligible amounts of corresponding radiating element, antenna gain is small, and detection range is close.In addition, conventional radiation unit with
Design angle between microstrip transmission line is 90 °, and the fabrication error of this right angle technique is larger in practical PCB antenna production, is led
It causes PCB antenna performance difference produced larger, and then influences volume production consistency.
Utility model content
In view of this, the utility model embodiment discloses a kind of PCB antenna and millimetre-wave radar, with reduce radiating element with
Non-linear mutual interference between microstrip transmission line, so that meeting bandwidth of operation using main equipments such as the millimetre-wave radars of PCB antenna
When antenna gain it is big, detection range is remote；Meanwhile promoting the volume production consistency of PCB antenna.
The utility model embodiment discloses a kind of PCB antenna, including：Metal floor, high frequency laminate and aerial array, institute
The radiating element that aerial array includes the microstrip transmission line in vertical bar shape and preset quantity is stated, the preset quantity is according to institute
The system gain of main equipment determines where stating PCB antenna, and each radiating element includes two coupling radiation fins；Wherein, institute
The bottom that metal floor is located at the high frequency laminate is stated, the aerial array is located at the top of the high frequency laminate, described
Radiating element is spaced apart since the signal output end of the microstrip transmission line along the microstrip transmission line, the adjacent radiation
Interval between unit is equal, between the coupling radiation fin of two in each radiating element and the microstrip transmission line
It is there are gap and symmetrical about the microstrip transmission line, it is each it is described coupling radiation fin adjacent to the microstrip transmission line one side with
The microstrip transmission line is parallel.
Optionally, in a kind of specific embodiment of the utility model embodiment, the main equipment is that center frequency is
The millimetre-wave radar of 79GHz, the relative dielectric constant of the high frequency laminate are 3, loss tangent 0.0013, thickness choosing
It is taken as 5mil.
Optionally, in a kind of specific embodiment of the utility model embodiment, the preset quantity is 8.
Optionally, in a kind of specific embodiment of the utility model embodiment, the width of the microstrip transmission line is
0.127mm。
Optionally, in a kind of specific embodiment of the utility model embodiment, belong to the same radiating element
The distance between two described coupling radiation fins are 0.381mm.
Optionally, in a kind of specific embodiment of the utility model embodiment, the aerial array further includes：Open circuit
Matched line, the open circuit matched line are vertically set on the microstrip transmission line of the interval between the adjacent radiating element
On, and positioned at on the microstrip transmission line of the signal input part neighbour of the microstrip transmission line, the open circuit matched line
It is uniformly distributed along the microstrip transmission line.
Optionally, in a kind of specific embodiment of the utility model embodiment, the aerial array further includes：In square
The matching microstrip line of shape, the matching microstrip line are connect with the signal input part of the microstrip transmission line, the matching microstrip line
In the side parallel with the microstrip transmission line be long side.
Optionally, it in a kind of specific embodiment of the utility model embodiment, the coupling radiation fin and described opens
Road matched line is rectangle, and side parallel with the microstrip transmission line in the coupling radiation fin is long side, described to open
The side vertical with the microstrip transmission line is long side in the matched line of road, parallel with the microstrip transmission line in the matching microstrip line
Side be long side.
Optionally, in a kind of specific embodiment of the utility model embodiment, between the adjacent radiating element
Between be divided into 1.36mm, the length and width of the coupling radiation fin is respectively 1mm and 0.6595mm, the length of the open circuit matched line
Degree and width are respectively 0.2015mm and 0.127mm, the length and width of the matching microstrip line be respectively 0.58mm and
0.35mm, each open circuit matched line distance with its similar in the distance between the radiating element be 0.3715mm, with institute
State open circuit matched line distance described be arranged on the microstrip transmission line of the signal input part neighbour of microstrip transmission line
It is 0.3215mm with microstrip line.
A kind of millimetre-wave radar is also disclosed in the utility model embodiment, including PCB described in above-mentioned any one embodiment
Antenna.
It, should from above-mentioned technical solution it is found that the utility model embodiment discloses a kind of PCB antenna and millimetre-wave radar
PCB antenna includes：Metal floor, high frequency laminate and aerial array, aerial array include in vertical bar shape microstrip transmission line, with
And the radiating element of preset quantity, preset quantity are determined according to the system gain of main equipment where PCB antenna, each radiating element
Including two coupling radiation fins；Wherein, metal floor is located at the bottom of high frequency laminate, and aerial array is located at high frequency laminate
Top, radiating element are spaced apart since the signal output end of microstrip transmission line along microstrip transmission line, adjacent radiation unit it
Between interval it is equal, there are gap and about micro-strip between two couplings radiation fin and microstrip transmission lines in each radiating element
Transmission line is symmetrical, and each coupling radiation fin is parallel with microstrip transmission line adjacent to one side of microstrip transmission line.The utility model is implemented
Between two couplings radiation fin and microstrip transmission lines in each radiating element of the disclosed PCB antenna of example there are gap and about
Microstrip transmission line is symmetrical, and each coupling radiation fin is parallel with microstrip transmission line adjacent to one side of microstrip transmission line, and this reduce spokes
Penetrate the non-linear mutual interference between unit and microstrip transmission line.Therefore, compared with prior art, same amount of this reality of radiating element
The bandwidth of operation of the PCB antenna disclosed in new embodiment is larger, uses the milli of PCB antenna disclosed in the utility model embodiment
More radiating elements can be arranged when meeting bandwidth of operation for the main equipments such as metre wave radar, and antenna gain is big, and detection range is remote.
Simultaneously as two coupling radiation fins and micro-strip in each radiating element of PCB antenna disclosed in the utility model embodiment
There are gaps between transmission line, eliminate the fabrication error in practical PCB antenna production between radiating element and microstrip transmission line,
So PCB antenna performance difference produced is also smaller, this improves the volume production consistency of PCB antenna.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to disclosed attached drawing.
Fig. 1 is a kind of structural schematic diagram of PCB antenna disclosed in the utility model embodiment；
Fig. 2 is the structural schematic diagram of another kind PCB antenna disclosed in the utility model embodiment；
Fig. 3 is a kind of structural schematic diagram of aerial array disclosed in the utility model embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model embodiment discloses a kind of PCB antenna and millimetre-wave radar, is transmitted with reducing radiating element and micro-strip
Non-linear mutual interference between line, so that antenna increases when meeting bandwidth of operation using main equipments such as the millimetre-wave radars of PCB antenna
Beneficial big, detection range is remote；Meanwhile promoting the volume production consistency of PCB antenna.
It is a kind of structural schematic diagram of PCB antenna disclosed in the utility model embodiment referring to Fig. 1.As shown in Figure 1, this
A kind of PCB antenna disclosed in utility model embodiment includes：
Metal floor 11, high frequency laminate 12 and aerial array 13, aerial array 13 include transmitting in the micro-strip of vertical bar shape
Line 131 and the radiating element of preset quantity 132.Wherein, preset quantity here is according to main equipment where PCB antenna
Gain of uniting determines.For example, being 79GHz for centre frequency, millimetre-wave radar (the i.e. PCB antenna that bandwidth of operation is 77~81GHz
Place main equipment) for, when using the PCB antenna in the utility model embodiment, meets bandwidth of operation and be able to use
The quantity of radiating element 132 is up to 10, then a certain number that can be determined as preset quantity according to system gain in 4~10
Amount, 132 quantity of radiating element in PCB antenna is 8 as shown in figure 1.
As shown in Figure 1, each radiating element 132 includes two coupling radiation fins 1321, metal floor 11 is located at high frequency Jie
The bottom of scutum 12, aerial array 13 are located at the top of high frequency laminate 12, letter of the radiating element 132 from microstrip transmission line 131
Number output end starts to be spaced apart along microstrip transmission line 131, and the interval between adjacent radiation unit 132 is equal, and each radiation is single
It is there are gap and right about microstrip transmission line 131 between two couplings radiation fin 1321 and microstrip transmission lines 131 in member 132
Claim, each coupling radiation fin 1321 is parallel with microstrip transmission line 131 adjacent to one side of microstrip transmission line 131.In addition, micro-strip is transmitted
The signal input part of line 131 and the signal output end of microstrip transmission line 131 are located at the both ends of microstrip transmission line 131, micro-strip transmission
The signal input part of line stretches out radiating element 132.
Two coupling radiation fins and micro-strip in each radiating element of PCB antenna disclosed in the utility model embodiment pass
It is there are gap and symmetrical about microstrip transmission line between defeated line, the one side and micro-strip of each coupling radiation fin adjacent to microstrip transmission line
Transmission line is parallel, and this reduce the non-linear mutual interferences between radiating element and microstrip transmission line.Therefore, compared with prior art,
The bandwidth of operation of PCB antenna disclosed in same amount of radiating element the utility model embodiment is larger, uses the utility model
It is single that more radiation can be arranged when meeting bandwidth of operation for the main equipments such as the millimetre-wave radar of PCB antenna disclosed in embodiment
Member, antenna gain is big, and detection range is remote.Simultaneously as each radiating element of PCB antenna disclosed in the utility model embodiment
In two couplings radiation fin and microstrip transmission lines between there are gap, eliminate in practical PCB antenna production radiating element with
Fabrication error between microstrip transmission line, so PCB antenna performance difference produced is also smaller, this improves PCB antenna
Volume production consistency.
Optionally, in a kind of specific embodiment of the utility model embodiment, main equipment is that center frequency is 79GHz
Millimetre-wave radar, the relative dielectric constant of high frequency laminate 12 is 3, and loss tangent 0.0013, thickness is chosen for
5mil.Wherein, the millimetre-wave radar that centre frequency is 79GHz is often referred to the millimetre-wave radar that bandwidth of operation is 77~81GHz.
Optionally, in a kind of specific embodiment of the utility model embodiment, preset quantity is 8.Wherein, it presets
Quantity is determined according to the system gain of main equipment.For example, being 79GHz for centre frequency, the milli that bandwidth of operation is 77~81GHz
Metre wave radar, when the system gain difference of millimetre-wave radar, preset quantity may be other quantity, such as can be 4,10
Deng.
Optionally, in a kind of specific embodiment of the utility model embodiment, the width of microstrip transmission line 131 is
0.127mm.It should be noted that the width of microstrip transmission line 131 is a kind of preferable implementation herein, actually make
In, the width of microstrip transmission line 131 may be for 0.126mm, 0.128mm etc..
Optionally, in a kind of specific embodiment of the utility model embodiment, belong to the two of same radiating element 132
The distance between a coupling radiation fin 1321 is 0.381mm.It should be noted that belonging to the two of same radiating element 132 herein
Only a kind of preferable implementation belongs to same radiation in actual use to the distance between a coupling radiation fin 1321
The distance between two coupling radiation fins 1321 of unit 132 may be for 0.380mm, 0.382mm etc..
In actual use, to be coupled impedance caused by radiation fin 1321, as shown in Fig. 2, in the utility model
In a kind of specific embodiment of embodiment, aerial array 13 shown in Fig. 1 can also include：Open circuit matched line 133, open circuit
Wiring 133 is vertically set on the microstrip transmission line 131 of the interval between adjacent radiation unit, and is located at and is passed with micro-strip
On the microstrip transmission line 131 of the signal input part neighbour of defeated line 131, open circuit matched line 133 uniformly divides along microstrip transmission line 131
The distance between cloth, i.e., each open circuit matched line 133 and close signal output end and adjacent thereto radiating element 132 is spy
Set a distance is such as 0.3mm.
Optionally, as shown in Fig. 2, in a kind of specific embodiment of the utility model embodiment, antenna shown in Fig. 1
Array 13 can also include：In the matching microstrip line 134 of rectangle, the signal for matching microstrip line 134 and microstrip transmission line 131 is inputted
End connection, matching side parallel with microstrip transmission line 131 in microstrip line 134 is long side.At this point, the letter with microstrip transmission line 131
The open circuit matched line 133 being arranged on the microstrip transmission line 131 of number input terminal neighbour is located at matching microstrip line 134 and radiating element
Between 132, i.e., open circuit matched line 133 be vertically set on be located at matching microstrip line 134 and radiating element 132 between interval it is micro-
On band transmission line 131.Wherein, the impedance and microstrip transmission line of the width and length of microstrip line 134 according to input source are matched
131, impedance caused by radiating element 132 etc. codetermines, when including open circuit matched line 133 in aerial array 13, matching
The width and length of microstrip line 134 are also related with impedance caused by open circuit matched line 133.It is different according to actual needs, it can be with
Setting matching microstrip line 134 width and length, such as matching microstrip line 134 width and length be respectively 0.41mm and
0.61mm.The setting of matching microstrip line 134 improves the working performance of PCB antenna.
Optionally, in a kind of specific embodiment of the utility model embodiment, coupling radiation fin 1321 and open circuit
Wiring 133 is rectangle, and coupling side parallel with microstrip transmission line 131 in radiation fin 1321 is long side, matched line 133 of opening a way
In the side vertical with microstrip transmission line 131 be long side.In actual use, coupling radiation fin 1321 and open circuit matched line 133
Can be other shapes, but couple radiation fin 1321 adjacent to microstrip transmission line 131 need on one side it is parallel with microstrip transmission line 131.
Such as coupling radiation fin 1321 can also be that semicircle, open circuit matched line 133 can be right angled triangle.
Optionally, in a kind of specific embodiment of the utility model embodiment, between adjacent radiation unit 132 between
It is divided into 1.36mm, the length and width of coupling radiation fin 1321 is respectively 1mm and 0.6595mm, the length for matched line 133 of opening a way
It is respectively 0.2015mm and 0.127mm with width, the length and width of matching microstrip line 134 is respectively 0.58mm and 0.35mm,
Each 133 distance of open circuit matched line with its similar in the distance between radiating element 132 be 0.3715mm, with microstrip transmission line
The open circuit matched line 133 being arranged on the microstrip transmission line 131 of 131 signal input part neighbour apart from matching microstrip line 134 be
0.3215mm。
Wherein, two coupling spokes since the interval between adjacent radiation unit 132 is equal, in each radiating element 132
Penetrate there are gap and symmetrical about microstrip transmission line 131 between piece 1321 and microstrip transmission line 131, open circuit matching 133 is along micro-strip
Transmission line 131 is uniformly distributed, so aerial array 13 has certain periodicity.The width of microstrip transmission line 131, belong to it is same
Interval, coupling radiation between the distance between two coupling radiation fins 1321 of radiating element 132, adjacent radiation unit 132
The length and width of piece 1321, the length and width for matched line 133 of opening a way, each 133 distance of open circuit matched line and its similar in
It is arranged on the microstrip transmission line 131 of the signal input part neighbour of the distance between radiating element 132 and microstrip transmission line 131
The parameters such as the distance between matched line 133 and matching microstrip line 134 open a way according to the impedance in each period, in the host heart frequency
The centre frequency of transmission phase difference and main equipment caused by rate is determined.Specifically, couple radiation fin 132 length by
The centre frequency of main equipment is determined that the width of microstrip transmission line 131, two couplings for belonging to same radiating element 132 radiate
Length and width, the open circuit at interval, coupling radiation fin 1321 between the distance between piece 1321, adjacent radiation unit 132
The length and width of wiring 133, each 133 distance of open circuit matched line and the distance between radiating element 132 similar in it, with it is micro-
The open circuit matched line 133 and matching microstrip line being arranged on the microstrip transmission line 131 of signal input part neighbour with transmission line 131
The distance between 134 transmission phase difference caused by frequency of heart and master set by the impedance in each period and in the host
Standby centre frequency codetermines, and matches the impedance and microstrip transmission line of the width and length of microstrip line 134 according to input source
131, impedance caused by radiating element 132 etc. codetermines.For example, the centre frequency in millimetre-wave radar is 79GHz, each
Period at the centre frequency of millimetre-wave radar caused by transmission phase difference be 360 °, when the impedance in each period is 54 Ω, phase
Each parameter answered can be：The width of microstrip transmission line 131 is 0.127mm, belongs to two coupling spokes of same radiating element 132
1.36mm, coupling radiation fin 1321 are divided between the distance between piece 1321 is penetrated between 0.381mm, adjacent radiation unit 132
Length and width 1mm and 0.6595mm, open a way matched line 133 length and width be 0.2015mm and 0.127mm, matching it is micro-
Length and width with line 134 is respectively that 0.58mm and 0.35mm, each 133 distance of open circuit matched line and radiation similar in it are single
Member the distance between 132 is 0.3715mm, with set on the microstrip transmission line 131 of the signal input part neighbour of microstrip transmission line 131
The distance between open circuit matched line 133 and matching microstrip line 134 for setting are 0.3215mm.In actual use, according to millimeter wave
The performance requirement of radar, the width of adjustable microstrip transmission line 131, two coupling radiation fins for belonging to same radiating element 132
The distance between 1321, the interval between adjacent radiation unit 132, the length and width for coupling radiation fin 1321, open circuit matching
The length and width of line 133, length and width, each 133 distance of open circuit matched line and the spoke similar in it for matching microstrip line 134
It penetrates the distance between unit 132, opened with what is be arranged on the microstrip transmission line 131 of the signal input part neighbour of microstrip transmission line 131
The parameters such as the distance between road matched line 133 and matching microstrip line 134.
As shown in Figure 1, the PCB antenna of the utility model embodiment is in actual use, signal is by being located at the micro- of left end
Band 131 one end feed-in of transmission line, coupling radiation fin 1321 obtain signal energy through the slot-coupled near microstrip transmission line 131,
And radiate signal energy to space in the form of an electromagnetic wave, series connection PCB array antenna is formed, realizes the hair of signal in main equipment
It penetrates and receive capabilities.As shown in Fig. 2, signal is by matching microstrip line 134 when being provided with matching microstrip line 134 in PCB antenna
One end feed-in, matched microstrip line 14 enter the microstrip transmission line 131 connecting with matching 134 other end of microstrip line, coupling radiation
Piece 1321 through near microstrip transmission line 131 slot-coupled obtain signal energy, and by signal energy in the form of an electromagnetic wave to
Space radiation forms series connection PCB array antenna, realizes the transmitting and receive capabilities of signal in main equipment.It is arranged in PCB antenna
When having open circuit matched line 133, open circuit matched line 133 is used to be coupled the impedance of radiation fin 1321.
Experimental result is shown：Compared with prior art, PCB antenna disclosed in the utility model embodiment is in different frequency
The main lobe of lower phase pushing figure difference and directional diagram direction sex differernce is smaller, reduces between radiating element and microstrip transmission line
Non-linear mutual interference.For example, as shown in figure 3, being 79GHz for centre frequency, the millimeter wave thunder that bandwidth of operation is 77~81GHz
It reaches, is 3 in the relative dielectric constant of high frequency laminate 12, loss tangent 0.0013, thickness is chosen for 5mil, and micro-strip passes
The distance between two coupling radiation fins 1321 s=that the width of defeated line 131 is 0.127mm, belongs to same radiating element 132
The length and width l of interval d=1.36mm, coupling radiation fin 1321 between 0.381mm, adjacent radiation unit 132p=1mm
And wpThe length and width l of=0.6595mm, matched line 133 of opening a wayg=0.2015mm and wg=0.127mm, matching microstrip line
134 length and width is respectively lf=0.58mm and wf=0.35mm, each 133 distance of open circuit matched line and spoke similar in it
Penetrate the distance between unit 132 l2=0.3715mm, the microstrip transmission line with the signal input part neighbour of microstrip transmission line 131
The distance between the open circuit matched line 133 and matching microstrip line 134 that are arranged on 131 l1When=0.3215mm, passed with conventional microstrip
Defeated line is compared with transmission-radiating element that rectangular radiation element forms, the transmission phase in each period in the utility model embodiment
It is 28.1 ° that position offset difference is become smaller by 30.8 °；The main lobe of directional diagram, which is directed toward sex differernce, has ± 5 ° to be reduced into ± 1.2 °, entirety
Reduce the non-linear mutual interference between radiating element and microstrip transmission line.In addition, when PCB antenna uses 8 radiating elements, day
Line -10dB bandwidth of operation realizes all standing of 76~81GHz frequency from 76~81.5GHz；In bandwidth of operation, antenna gain
From 14.8~15.6dB, for gain flatness in ± 0.4dB, stiffness of system is good.
Corresponding with above-described embodiment, the utility model embodiment also discloses a kind of millimetre-wave radar, the millimeter wave thunder
Up to the PCB antenna that sensor includes in above-described embodiment.In practical applications, millimetre-wave radar may include one or multiple
PCB antenna, depending on the quantity concrete foundation actual needs of PCB antenna included by millimetre-wave radar, the utility model embodiment
It is not limited here.
Millimetre-wave radar in the utility model embodiment, when meeting bandwidth of operation can in PCB antenna serial number
More radiating elements are measured, antenna gain is big, and detection range is remote.It solves and is identified in the prior art in order to meet millimetre-wave radar
The demand of the small obstacles such as pedestrian, bicycle uses transmission-radiating element negligible amounts in PCB antenna, causes millimeter wave
The lesser problem of the detection range of radar.Further, since PCB antenna used in the utility model embodiment millimetre-wave radar
There are gaps between two couplings radiation fin and microstrip transmission lines in each radiating element, eliminate practical PCB antenna production
Fabrication error between middle radiating element and microstrip transmission line, so PCB antenna performance difference produced is also smaller, this promotion
The volume production consistency of PCB antenna, and then improve radar stability.
Finally, it is to be noted that, herein, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (10)
1. a kind of PCB antenna, which is characterized in that including：Metal floor, high frequency laminate and aerial array, the aerial array
Radiating element including microstrip transmission line and preset quantity in vertical bar shape, the preset quantity is according to the PCB antenna institute
It is determined in the system gain of main equipment, each radiating element includes two coupling radiation fins；Wherein, the metal floor position
In the bottom of the high frequency laminate, the aerial array is located at the top of the high frequency laminate, and the radiating element is from institute
The signal output end for stating microstrip transmission line starts to be spaced apart along the microstrip transmission line, between the adjacent radiating element between
Every equal, two coupling radiation fins in each radiating element and there are gap and passes between the microstrip transmission line
Symmetrical in the microstrip transmission line, each coupling radiation fin is transmitted adjacent to one side of the microstrip transmission line with the micro-strip
Line is parallel.
2. PCB antenna according to claim 1, which is characterized in that the main equipment is the millimeter that center frequency is 79GHz
Wave radar, the relative dielectric constant of the high frequency laminate are 3, and loss tangent 0.0013, thickness is chosen for 5mil.
3. PCB antenna according to claim 2, which is characterized in that the preset quantity is 8.
4. PCB antenna according to claim 3, which is characterized in that the width of the microstrip transmission line is 0.127mm.
5. PCB antenna according to claim 4, which is characterized in that belong to two couplings of the same radiating element
Closing the distance between radiation fin is 0.381mm.
6. described in any item PCB antennas according to claim 1~5, which is characterized in that the aerial array further includes：Open circuit
Matched line, the open circuit matched line are vertically set on the microstrip transmission line of the interval between the adjacent radiating element
On, and positioned at on the microstrip transmission line of the signal input part neighbour of the microstrip transmission line, the open circuit matched line
It is uniformly distributed along the microstrip transmission line.
7. PCB antenna according to claim 6, which is characterized in that the aerial array further includes：It is micro- in the matching of rectangle
Band line, the matching microstrip line connect with the signal input part of the microstrip transmission line, in the matching microstrip line with it is described micro-
It is long side with the parallel side of transmission line.
8. PCB antenna according to claim 7, which is characterized in that the coupling radiation fin and the open circuit matched line are equal
For rectangle, and side parallel with the microstrip transmission line in the coupling radiation fin is long side, in the open circuit matched line with institute
Stating the vertical side of microstrip transmission line is long side, and the side parallel with the microstrip transmission line is long side in the matching microstrip line.
9. PCB antenna according to claim 8, which is characterized in that be divided between the adjacent radiating element
1.36mm, the length and width of the coupling radiation fin are respectively 1mm and 0.6595mm, the length and width of the open circuit matched line
Degree is respectively 0.2015mm and 0.127mm, and the length and width of the matching microstrip line is respectively 0.58mm and 0.35mm, each
The open circuit matched line distance with its similar in the distance between the radiating element be 0.3715mm, with the microstrip transmission line
Signal input part neighbour the microstrip transmission line on the open circuit matched line that is arranged be apart from the matching microstrip line
0.3215mm。
10. a kind of millimetre-wave radar, which is characterized in that including PCB antenna described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820594013.XU CN208111679U (en) | 2018-04-24 | 2018-04-24 | A kind of PCB antenna and millimetre-wave radar |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820594013.XU CN208111679U (en) | 2018-04-24 | 2018-04-24 | A kind of PCB antenna and millimetre-wave radar |
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| CN208111679U true CN208111679U (en) | 2018-11-16 |
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| CN (1) | CN208111679U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380238A (en) * | 2019-07-20 | 2019-10-25 | 中国船舶重工集团公司第七二四研究所 | A kind of paster antenna of the interior monitoring line of same layer integrated RF |
| TWI711216B (en) * | 2019-06-06 | 2020-11-21 | 飛鳥車用電子股份有限公司 | Antenna structure |
| CN114336003A (en) * | 2020-09-30 | 2022-04-12 | 华为技术有限公司 | Antenna and preparation method thereof, millimeter wave sensor and terminal |
-
2018
- 2018-04-24 CN CN201820594013.XU patent/CN208111679U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI711216B (en) * | 2019-06-06 | 2020-11-21 | 飛鳥車用電子股份有限公司 | Antenna structure |
| CN110380238A (en) * | 2019-07-20 | 2019-10-25 | 中国船舶重工集团公司第七二四研究所 | A kind of paster antenna of the interior monitoring line of same layer integrated RF |
| CN114336003A (en) * | 2020-09-30 | 2022-04-12 | 华为技术有限公司 | Antenna and preparation method thereof, millimeter wave sensor and terminal |
| CN114336003B (en) * | 2020-09-30 | 2024-01-30 | 华为技术有限公司 | Antenna, preparation method thereof, millimeter wave sensor and terminal |
| EP4213301A4 (en) * | 2020-09-30 | 2024-03-13 | Huawei Tech Co Ltd | Antenna and preparation method therefor, and millimeter-wave sensor and terminal |
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