CN209592319U - Microstrip antenna, circuit board and terminal - Google Patents
Microstrip antenna, circuit board and terminal Download PDFInfo
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- CN209592319U CN209592319U CN201920444237.7U CN201920444237U CN209592319U CN 209592319 U CN209592319 U CN 209592319U CN 201920444237 U CN201920444237 U CN 201920444237U CN 209592319 U CN209592319 U CN 209592319U
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Abstract
The utility model embodiment provides a kind of microstrip antenna, multiple transmitting antennas and multiple receiving antennas including being set to medium substrate surface, each transmitting antenna and/or the receiving antenna include antenna array tuple, first feeder line of impedance transformer and connection the antenna array tuple and the impedance transformer, the antenna array tuple includes the mutiple antennas array element being arranged in a linear and multiple second feeder lines for being connected between two bays of arbitrary neighborhood, the equal length of second feeder line, the equal length of the bay, width from one end of the antenna array tuple to the other end include in being gradually incremented by and the gradually changing rule that successively decreases, so, the gain performance of microstrip antenna can effectively be increased.The utility model embodiment additionally provides a kind of circuit board, terminal.
Description
Technical field
The utility model relates to field of antenna more particularly to a kind of microstrip antennas, circuit board and terminal.
Background technique
Millimetre-wave radar is intelligent driving auxiliary system (Advanced Driver Assistance System, ADAS)
A kind of perceptive mode, compared with other perceptive modes (ultrasonic radar, camera, infrared ray and laser radar), millimeter wave
Radar can not only detect larger distance, but also detection accuracy with higher, can with all weather operations, in sleet environment,
Ability to work is stronger in smoky environment, and temperature stability is high, assists driving field in automotive safety, millimeter wave sensor is core
One of component.
Therefore, how the transmitting-receiving millimeter wave of high-gain be urgent need to resolve major issue.
Utility model content
In view of this, the utility model embodiment provides a kind of microstrip antenna, circuit board and terminal, can effectively realize
Transmitting-receiving to the high-gain of 77GHz millimeter wave.
In order to achieve the above objectives, the technical solution of the utility model embodiment is achieved in that
A kind of microstrip antenna, comprising: the multiple transmitting antennas and multiple receiving antennas of medium substrate surface are set to, it is each
The transmitting antenna and/or the receiving antenna include antenna array tuple and impedance transformer and the connection antenna array tuple
With the first feeder line of the impedance transformer, the antenna array tuple includes the mutiple antennas array element and difference being arranged in a linear
Multiple second feeder lines being connected between two bays of arbitrary neighborhood, the equal length of second feeder line, the antenna
The equal length of array element, width from one end of the antenna array tuple to the other end include in being gradually incremented by and the gradually change successively decreased
Law.
Wherein, adjacent to each other between the transmitting antenna and interval setting forms transmission antenna group, the receiving antenna it
Between adjacent to each other and interval setting form receiving antenna group, further include multiple grounded antennas, the multiple grounded antenna distinguishes position
In the two sides of the receiving antenna group.
Wherein, the quantity of the multiple transmitting antenna is two, and the quantity of the receiving antenna is four, the transmitting day
Interval between line is greater than the interval between the receiving antenna, and the quantity of the grounded antenna is two, wherein a ground connection day
Line is between the transmission antenna group and the receiving antenna group.
Wherein, two receiving antennas at the interval between the grounded antenna and corresponding adjacent receiving antenna and arbitrary neighborhood
Between interval it is equal.
Wherein, each antenna array tuple includes mutiple antennas array element, the multiple in each antenna array tuple
The width of bay is distributed in Chebyshev.
Wherein, the size of the impedance transformer is true according to the equivalent impedance of the antenna array tuple and first feeder line
It is fixed.
A kind of circuit board, including microstrip antenna, power supply and low frequency described in medium substrate, the utility model any embodiment
Digital circuit, the power supply and the low frequency digital circuit are located at the side on the medium substrate, and the microstrip antenna is located at
The other side opposite with the power supply and the low frequency digital circuit on the medium substrate.
Wherein, the surface of the medium substrate is additionally provided with bare metal, and the size of the bare metal, which is greater than, to be provided with
The size in the region of the microstrip antenna.
A kind of terminal, comprising: shell, the circuit board being contained in the shell and be set on the circuit board as
Microstrip antenna described in the utility model any embodiment, the part of the position of the circuit board described in face is by saturating on the shell
Wave material is made.
Wherein, half of medium wavelength X with a thickness of radar electromagnetic wave of the electromagnetic wave transparent materialm2 times of/2, the wave transparent material
The distance between material and the circuit board value are half of air wavelength X of radar electromagnetic wave03 times of/2.
A kind of microstrip antenna provided by the utility model embodiment, multiple transmittings including being set to medium substrate surface
Antenna and multiple receiving antennas, each transmitting antenna and/or the receiving antenna include antenna array tuple, impedance transformer
And the first feeder line of connection the antenna array tuple and the impedance transformer, the antenna array tuple include multiple linear
The mutiple antennas array element of arrangement and multiple second feeder lines being connected between two bays of arbitrary neighborhood, described
The equal length of two feeder lines, the equal length of the bay, width is from one end of the antenna array tuple to other end packet
It includes in the changing rule for being gradually incremented by and gradually successively decreasing.In this way, by the way that equal and bay is arranged in the length of the second feeder line
Length setting it is equal, convenient for rationally determination obtains the size of the transmitting antenna and the receiving antenna in a limited space
Parameter especially effectively increases microstrip antenna and sends and connect convenient for can effectively determine the dimensional parameters of high-gain microstrip antenna
Receive the gain of millimeter wave.
Detailed description of the invention
Fig. 1 is the schematic diagram for the microstrip antenna that an embodiment of the present invention provides；
Fig. 2 is the schematic diagram for the antenna array tuple that an embodiment of the present invention provides；
Fig. 3 is the schematic diagram for the antenna array tuple that another embodiment of the utility model provides；
Fig. 4 is the schematic diagram for the microstrip antenna that another embodiment of the utility model provides；
Fig. 5 is the schematic diagram of transmitting antenna or receiving antenna or grounded antenna that an embodiment of the present invention provides；
Fig. 6 is the structural schematic diagram for the circuit board that an embodiment of the present invention provides；
Fig. 7 is the structural schematic diagram for the circuit board that another embodiment of the utility model provides；
Fig. 8 is the structural schematic diagram for the terminal that an embodiment of the present invention provides.
Specific embodiment
Technical solutions of the utility model are further described in detail with reference to the accompanying drawings and specific embodiments of the specification.
Unless otherwise defined, the technology of all technical and scientific terms used herein and the technical field for belonging to the utility model
The normally understood meaning of personnel is identical.Terminology used in the description of the utility model herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in limitation the utility model.Term as used herein "and/or" includes one or more
Any and all combinations of a relevant listed item.
In the description of the present invention, it should be understood that term " center ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this is practical
Novel limitation.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary.For
For those skilled in the art, can understand as the case may be above-mentioned term in the present invention specifically contain
Justice.Referring to Fig. 1, the microstrip antenna 100 that an embodiment of the present invention provides, including being set to the multiple of medium substrate surface
Transmitting antenna 101 and multiple receiving antennas 102, each transmitting antenna 101 and/or the receiving antenna 102 include antenna
First feeder line 104 of array element group, impedance transformer 103 and connection the antenna array tuple and the impedance transformer 103, institute
Stating antenna array tuple includes the mutiple antennas array element 105 being arranged in a linear and two bays for being connected to arbitrary neighborhood
Between multiple second feeder lines 106, the equal length of second feeder line 106, the equal length of the bay 105 is wide
Spend from one end of the antenna array tuple to the other end include in being gradually incremented by and the gradually changing rule that successively decreases.
Here, transmitting antenna 101 is used to emit millimeter-wave signal, and receiving antenna 102 is used to receive millimeter-wave signal, described
The quantity of multiple transmitting antennas 101 and multiple receiving antennas 102 can be arranged on demand, for example, a transmitting antenna can be set,
Two receiving antennas；Also two transmitting antennas, four receiving antennas etc. can be set, wherein transmitting antenna more than 101, it is micro-
Gain with antenna 100 is bigger, and the distance that the millimeter wave of transmitting is detectable is remoter；Receiving antenna more than 102, microstrip antenna 100
Detecting error it is smaller, the resolution ratio of detection angle is higher, but transmitting antenna 101 and receiving antenna 102 in microstrip antenna 100
Quantity is more, and the dimensioned area of microstrip antenna demand is also bigger；The impedance transformer 103 is used to realize transmission line and transmitting day
Impedance matching between line 101 and receiving antenna 102；First feeder line 104 is respectively intended to connect corresponding transmitting antenna 101
Impedance transformer 103 and antenna array in interior impedance transformer 103 receiving antenna corresponding with antenna array tuple and connection
Tuple；The bay 105 is used to meet the signal transmitting of transmitting antenna 101 and the signal of receiving antenna 102 receives；It is described
Second feeder line 106 is respectively intended to connect the arbitrary neighborhood being arranged in a linear in the antenna array tuple in corresponding transmitting antenna 101
Two bays 105.
Wherein, referring to Fig.2, being a kind of structural schematic diagram of antenna array tuple described in described Fig. 1, the antenna array tuple
Including multiple second between the mutiple antennas array element being arranged in a linear and two bays for being connected to arbitrary neighborhood
Feeder line, the equal length of second feeder line, the equal length of the bay, width is from one end of the antenna array tuple
Include being specifically as follows in the changing rule for being gradually incremented by and gradually successively decreasing to the other end:
The antenna array tuple includes 8 bays being arranged in a linear, and 8 bays are respectively designated as day
The length and width of linear array member 201, bay 202 ... ..., bay 208, each bay is as shown in table 1 below,
Here, the size of bay transverse direction is known as length, unit mm, and longitudinal size is known as width, unit mm.
Table 1
Reference table 1 is it is found that equal length of the bay 201 to bay 208, and bay 204 and antenna array
First 205 width are maximum, and are in the changing rule gradually to successively decrease to both ends, i.e. the width of bay 201 to bay 204 is in
Gradually incremental changing rule, the width of bay 205 to bay 208 are in the changing rule gradually to successively decrease.
Table 2
Reference table 2 it is found that 211 to the second feeder line 217 of the second feeder line equal length.
Wherein, referring to Fig. 3, being another structural schematic diagram of antenna array tuple described in described Fig. 1, the antenna array
Tuple includes the mutiple antennas array element being arranged in a linear and is connected to multiple between two bays of arbitrary neighborhood
Second feeder line, the equal length of second feeder line, the equal length of the bay, width is from the antenna array tuple
One end to the other end include in being gradually incremented by and the gradually changing rule that successively decreases, specifically can be with are as follows:
The antenna array tuple includes 14 bays being arranged in a linear, and 14 bays are respectively designated as
Bay 301, bay 302 ... ..., bay 314, with reference to Fig. 3, the length of bay 301 to bay 314
Spend equal, and bay 307 and bay 308 width are maximum, and centered on bay 307 and bay 308
Gradually taper off, be incremented by again, the changing rule that successively decreases again to both ends, i.e., the width of bay 301 to bay 303 be in by
Gradually incremental changing rule, the width of bay 303 to bay 305 are in the changing rule gradually to successively decrease, bay
305 to bay 307 width in gradually incremental changing rule, the width of bay 308 to bay 310 be in by
The changing rule gradually to successively decrease, the width of bay 310 to bay 312 is in gradually incremental changing rule, bay
312 to the width of bay 314 be in the changing rule that gradually successively decreases.Correspondingly, the number of second feeder line is 13, institute
It states 13 the second feeder lines and is respectively designated as the second feeder line 321, the second feeder line 322 ... ..., the second feeder line 333, the second feeder line 321
Length to the second feeder line 333 is all the same.
The utility model microstrip antenna provided by the above embodiment, by the way that equal and day is arranged in the length of the second feeder line
The length setting of linear array member is equal, convenient for rationally determining the dimensional parameters of the transmitting antenna and the receiving antenna, is convenient for energy
Enough dimensional parameters for effectively determining high-gain microstrip antenna especially effectively increase the increasing that microstrip antenna sends and receives millimeter wave
Benefit.
In one embodiment, adjacent to each other between the transmitting antenna 101 and interval setting forms transmission antenna group, institute
It states adjacent to each other between receiving antenna 102 and interval setting and forms receiving antenna group, further include multiple grounded antennas, it is the multiple
Grounded antenna is located at the two sides of the receiving antenna group.
Here, adjacent to each other between the transmitting antenna 101 and interval setting forms transmission antenna group, the receiving antenna
Adjacent to each other and interval setting forms receiving antenna group between 102, wherein the interval between the transmitting antenna 101 can be set
Set can for 7.5745mm~7.6253mm, the interval between the receiving antenna 102 can be set to 1.8745mm~
1.9253mm improves the isolation between microstrip antenna in this way, being conducive to increase the gain of microstrip antenna.Meanwhile it being connect described
The two sides setting for receiving antenna sets is respectively provided with multiple grounded antennas, and can specifically include: the multiple grounded antenna uniformly divides
The quantity for being distributed in the grounded antenna of the two sides of the receiving antenna group or the side of the receiving antenna group is greater than the other side
The quantity of grounded antenna.In this way, advantageously reduce interference signal to receive antenna sets in each receiving antenna 102 effect of signals,
Make the optimum reception orientation for being maintained at millimeter-wave signal of the receiving direction maximum magnitude of receiving antenna 102.
The utility model microstrip antenna 100 provided by the above embodiment, respectively emits day by being rationally arranged in microstrip antenna
Interval between line 101 between each receiving antenna 102 and in the position of rationally setting grounded antenna, can make receiving antenna
The optimum reception orientation for being maintained at millimeter-wave signal of 102 direction maximum magnitude, so that microstrip antenna 100 be made to realize high increasing
Benefit, the performance for receiving and dispatching millimeter wave compared with large pitching angle.
In one embodiment, the quantity of the multiple transmitting antenna 101 is two, the multiple receiving antenna 102
Quantity is four, and the interval between the transmitting antenna 101 is greater than the interval between the receiving antenna 102, the ground connection day
The quantity of line 108 is two, wherein a grounded antenna 108 is between the transmission antenna group and the receiving antenna group.
In the publication of " a kind of 77GHz trailer-mounted radar microstrip antenna that big spacing is structured the formation ", between disclosing one kind greatly
Away from the 77GHz trailer-mounted radar microstrip antenna structured the formation, including substrate, feeding network, 144 antenna elements, 144 antenna lists
In arranged at equal intervals at the rectangular battle array of 12*12, the feeding network uses in the horizontal direction is arranged member in a manner of substantially symmetrical about its central axis,
The feeding network is used in vertical direction and is arranged to form a kind of face being made of 144 array elements with center origin symmetric mode
Battle array, face battle array is a transmitting antenna.The program greatly reduces the design difficulty of feeding network, effective solution antenna
The problem of the difference of cross-polarization performance caused by longer microstrip transmission line between unit, still, transmitting antenna is occupied in the program
Size is too big, under conditions of 77GHz Radar Products size is certain, places the antenna without enough spaces, so should
Kind antenna technology will realize that higher angular resolution is more difficult.Simultaneously as transmitting antenna more than 101, the increasing of microstrip antenna 100
Benefit is bigger, and the distance that the millimeter wave of transmitting is detectable is remoter；The detecting error of receiving antenna more than 102, microstrip antenna 100 is got over
Small, the resolution ratio of detection angle is higher, but the quantity of transmitting antenna 101 and receiving antenna 102 is more in microstrip antenna 100, micro-
Dimensioned area with antenna requirements is also bigger, therefore, in order to meet simultaneously to the best transmitting-receiving performance of millimeter wave and to micro-strip
The quantity of the multiple transmitting antenna 101 is set two by the compatibility that antenna size requires, the utility model embodiment, institute
The quantity for stating receiving antenna 102 is set as four, and the grounded antenna is set as two.In addition, due to the same microstrip antenna
On transmitting antenna and receiving antenna between can generate signal interference with couple, therefore in the transmission antenna group and the reception day
One grounded antenna is set between line group.
The utility model microstrip antenna 100 provided by the above embodiment, by the way that transmitting antenna 101 is rationally arranged, receives day
The positional relationship of the quantity of line 102 and grounded antenna, reasonable Arrangement transmitting antenna 101 and receiving antenna 102, makes microstrip antenna
100 realize the performance of high-gain receiving and transmitting signal in limited areal extent, and reduce transmitting antenna 101 and receiving antenna 102
Between signal interference and coupling.
In one embodiment, the interval between the grounded antenna and corresponding adjacent receiving antenna 102 and any phase
Interval between two adjacent receiving antennas 102 is equal.
Here it is possible to which the interval between the grounded antenna and the adjacent receiving antenna 102 is also configured as
1.8745mm~1.9253mm, so that the direction that the receiving antenna receives signal is maintained at front maximum, and gain is most strong.
The utility model microstrip antenna provided by the above embodiment, by being rationally arranged between grounded antenna and receiving antenna
Interval, the gain performance that receiving antenna in microstrip antenna receives millimeter wave can be further increased.
In one embodiment, each antenna array tuple includes mutiple antennas array element 106, each bay
In group, the width of the multiple bay 106 is distributed in Chebyshev.
Here, each antenna array tuple may include 8,10,14 ... etc. bays 106, for example,
By taking each antenna array tuple includes 10 bays 106 as an example, 10 bays 106 are to be arranged in a linear
It is in respectively the changing rule gradually to successively decrease, i.e., described 10 antenna arrays to both ends centered on 5th and the 6th bay 106
The width of member 106 is distributed in Chebyshev.
The utility model microstrip antenna provided by the above embodiment passes through each antenna in each antenna array tuple of reasonable Arrangement
The change width rule of array element, can further increase the gain performance of microstrip antenna.
In one embodiment, the size of the impedance transformer 103 is according to the antenna array tuple and first feedback
The equivalent impedance of line 104 determines.
Here, since 101/ receiving antenna of transmitting antenna, 102/ grounded antenna needs to connect the normal work of ability with transmission line
Make, and in its connection procedure with transmission line, if there is 101/ receiving antenna of transmitting antenna, 102/ grounded antenna and transmission
Line impedence unmatched situation can generate reflection on transmission line, to influence the emission effciency of microstrip antenna.Therefore in each hair
Penetrate in 101/ receiving antenna of antenna, 102/ grounded antenna and an impedance transformer 103 be set, for realize more transmission lines with it is corresponding
Impedance matching between 101/ receiving antenna of transmitting antenna, 102/ grounded antenna, wherein the size root of the impedance transformer 103
It is determined according to the antenna array tuple and the equivalent impedance of first feeder line 104, here, the size of the impedance transformer 103
Mainly emphasize the length and width of the impedance transformer 103.For example, the transmission line is 50 Ω cablings, trace width is
0.2130mm；Determine that the impedance transformer 103 is according to the equivalent impedance of the antenna array tuple and first feeder line 104
1/4 λ impedance transformer when length is 0.7146mm~0.7654mm, width is 0.1776mm~0.2284mm, can be realized each
The impedance matching of 101/ receiving antenna of transmitting antenna 102/ grounded antenna and corresponding transmission line.
The utility model microstrip antenna provided by the above embodiment, according to the antenna array tuple and first feeder line
104 equivalent impedance determines the size of the impedance transformer 103, can effectively realize each transmitting antenna in microstrip antenna 100
The impedance matching of 101/ receiving antenna 102/ grounded antenna and corresponding transmission line, to realize the transmitting-receiving of the high-gain of microstrip antenna
Performance.
The utility model embodiment is further described below with reference to a specific embodiment.
With reference to Fig. 4, the utility model embodiment provides a kind of microstrip antenna 400, and the microstrip antenna 400 can be applied
In on the 77GHz millimeter wave sensor chip AWR1642 of Texas Instruments, the microstrip antenna 400 includes: two transmitting days
Line 401, four receiving antennas 402, two grounded antennas 403, wherein described two transmitting antennas 401 are disposed adjacent to form hair
Antenna sets are penetrated, and being spaced d1 is 7.5745mm~7.6253mm；Four receiving antennas are disposed adjacent to form receiving antenna group,
And the interval d2 between each adjacent two receiving antenna is set as equal, the range of interval d2 be 1.8745mm~
1.9253mm；Described two grounded antennas are located at the two sides of the receiving antenna group, and one of them is located at the transmitting
Antenna 401 and receiving antenna 402/, the grounded antenna 403 is with the interval d3 of adjacent reception antenna 402 and per adjacent two
Interval d2 between a receiving antenna is equal, is 1.8745mm~1.9253mm.In this embodiment, the every transmitting antenna
401, the receiving antenna 402 and the grounded antenna 403 respectively include antenna array tuple, impedance transformer 404 and connect
Connect the first feeder line 405 of the antenna array tuple Yu the impedance transformer 404, wherein the selection of impedance transformer 404 1/
4 λ impedance transformers, the antenna array tuple include 8 bays, and 8 bays are arranged in a straight line and by 7
Second feeder line is sequentially connected.It is the enlarged drawing of the transmitting antenna with reference to Fig. 5,8 bays are respectively designated as array element
501, array element 502 ..., array element 508,7 second feeder lines are respectively designated as feeder line 509, feeder line 510 ... feeder line 515.
In the present embodiment, the length and width, the length and width of each bay 504 of the 1/4 λ impedance transformer of selection,
The length and width of first feeder line, the length and width of each second feeder line can be found in the following table 3.Here, bay, first
Feeder line, the second feeder line, 1/4 λ impedance transformer transverse direction size be known as length, unit mm, longitudinal size is known as width, single
Position is mm.
Table 3
In this embodiment, the microstrip antenna is emulated using 3 D electromagnetic simulation software HFSS15.0, is obtained
The simulation result of microstrip antenna is as follows: the yield value of microstrip antenna is 15.6dB；The minor level of microstrip antenna is the face E-
The face 22.12dB, H -29.78dB；The pitch angle of microstrip antenna is 12.8 degree of the face E, 72.5 degree of the face H.
The utility model microstrip antenna provided by the above embodiment, by the way that the quantity of all kinds of antennas is rationally arranged, position is closed
The relevant parameter of system and all kinds of antennas itself, can make microstrip antenna realize high-gain, low pair in limited size range
Valve level, compared with large pitching angle transmitting and receive millimeter-wave signal performance.
As shown in fig. 6, the utility model embodiment provides a kind of circuit board, including medium substrate 601, the utility model
Microstrip antenna 602, power supply described in any embodiment and low frequency digital circuit 603, the power supply and the low frequency digital circuit
603 are located at the side on the medium substrate 601, and the microstrip antenna 602 is located on the medium substrate 601 and the power supply
And the other side that the low frequency digital circuit 603 is opposite.
Here, the medium substrate 601 can be the material substrate of Rogers3003, be printed with manufacturer's title
It is set as surface on one side, the another side of apparent surface is the back side, and the power supply and low frequency digital circuit 603 are in the medium substrate
It is distributed on the left of 601 surface and on the left of the back side, the microstrip antenna 602 is located on the right side of the surface of the medium substrate 601.
The utility model circuit board provided by the above embodiment, by by the power supply and the low frequency digital circuit and institute
It states microstrip antenna point both ends to be arranged, crosstalk of the low frequency digital circuit to signal on microstrip antenna can be reduced.
In one embodiment, as shown in fig. 7, the surface of the medium substrate 601 is additionally provided with bare metal 701, institute
The size for stating bare metal 701 is greater than the size for being provided with the region of the microstrip antenna 602.
Here, on the surface of the medium substrate 601 and positioned at the microstrip antenna 602 and the power supply and low frequency digital
The middle section of circuit 603 is provided with bare metal 701, the bare metal 701 be conducive to the microstrip antenna 602 with it is described
The heat of power supply and low frequency digital circuit 603 during the work time distributes.Moreover, the heat in order to enable microstrip antenna 602
It distributes in time and quickly, the size of the bare metal 701 is greater than to the size in the region of the microstrip antenna 602, thus
Keep the power supply and low frequency digital circuit 603 and the temperature of microstrip antenna 602 not too high, performance when circuit board being made to work is more
Add stabilization, wherein the bare metal can be copper, silver, gold etc., here, the bare metal 701 is using the table in exposed copper
One layer of gold of face deposition or plating, to enhance the antioxygenic property of the circuit board.
In addition, being also equipped with bare metal 701, on the right side of the back side of medium substrate 601 so as to further increase
The rate of heat dispation for stating microstrip antenna 602 and the power supply and low frequency digital circuit 603, guarantees the working performance of circuit board.
The utility model circuit board provided by the above embodiment, by increasing bare metal heat dissipation region to circuit board
Heat dissipation, keeps the temperature of the low frequency digital circuit and microstrip antenna not too high, keeps the working performance of circuit board more stable.
As shown in figure 8, the utility model embodiment provides a kind of terminal, comprising: shell 801 is contained in the shell
Circuit board in 801 and the microstrip antenna as described in any embodiment in the utility model being set on the circuit board,
The part of the position of the circuit board described in face is made of electromagnetic wave transparent material 802 on the shell 801.
Here, the shell 801 can be the metal shell in rectangular parallelepiped structure, and the electromagnetic wave transparent material can select black
PBT-GF30 material, the dielectric constant of the material is 3.0 or so, and loss tangent tan δ is about 0.002 order of magnitude.In addition, In
Four opposite corners of the shell 801 are provided with mounting hole, are also equipped with connector in the side of the shell 801, institute
It states connector and is used to connect the equipment outside the shell 801, also, the connector and the shell 801 are anti-with waterproof
The performance of dirt.
The utility model terminal provided by the above embodiment can either substantially reduce external environment to the negative of microstrip antenna
It influences, and microstrip antenna can be made to reach and millimeter wave is preferably emitted and reception.
In one embodiment, half of medium wavelength X with a thickness of radar electromagnetic wave of the electromagnetic wave transparent materialm2 times of/2,
The distance between the electromagnetic wave transparent material and the circuit board value are half of air wavelength X of radar electromagnetic wave03 times of/2.
Here, the specific calculating formula of the thickness of the electromagnetic wave transparent material are as follows:
H=2* λm/ 2=2* { λ0/[(εr)1/2]/2=3.4mm,
The specific calculating formula of the distance between the electromagnetic wave transparent material and the circuit board value are as follows:
L=3* λ0/ 2=5.8mm,
That is, in this embodiment, the electromagnetic wave transparent material with a thickness of 3.4mm, the electromagnetic wave transparent material and the electricity
The distance between road plate value is 5.8mm.
By selecting suitable electromagnetic wave transparent material, and wave transparent material is rationally arranged in the utility model terminal provided by the above embodiment
Material and the distance between microstrip antenna value, can effectively reduce that microstrip antenna is subject to blocking and shielding, and optimizes the terminal
Using effect.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with the power
Subject to the protection scope that benefit requires.
Claims (10)
1. a kind of microstrip antenna characterized by comprising be set to medium substrate surface multiple transmitting antennas and multiple receptions
Antenna, each transmitting antenna and/or the receiving antenna include described in antenna array tuple and impedance transformer and connection
First feeder line of antenna array tuple and the impedance transformer, the antenna array tuple include the mutiple antennas battle array being arranged in a linear
Member and multiple second feeder lines being connected between two bays of arbitrary neighborhood, the length phase of second feeder line
Deng, the equal length of the bay, width from one end of the antenna array tuple to the other end include in being gradually incremented by and
The changing rule gradually to successively decrease.
2. microstrip antenna according to claim 1, which is characterized in that adjacent to each other between the transmitting antenna and interval is set
It sets to form transmission antenna group, it further includes multiple that adjacent to each other between the receiving antenna and interval setting, which forms receiving antenna group,
Grounded antenna, the multiple grounded antenna are located at the two sides of the receiving antenna group.
3. microstrip antenna according to claim 2, which is characterized in that the quantity of the multiple transmitting antenna is two, institute
The quantity for stating receiving antenna is four, and the interval between the transmitting antenna is greater than the interval between the receiving antenna, described
The quantity of grounded antenna is two, wherein a grounded antenna is between the transmission antenna group and the receiving antenna group.
4. microstrip antenna according to claim 3, which is characterized in that the grounded antenna and corresponding adjacent receiving antenna
Between interval it is equal with the interval between two receiving antennas of arbitrary neighborhood.
5. microstrip antenna according to claim 1, which is characterized in that each antenna array tuple includes mutiple antennas battle array
Member, in each antenna array tuple, the width of the multiple bay is distributed in Chebyshev.
6. microstrip antenna according to any one of claim 1 to 5, which is characterized in that the size of the impedance transformer
It is determined according to the antenna array tuple and the equivalent impedance of first feeder line.
7. a kind of circuit board, which is characterized in that including medium substrate, microstrip antenna of any of claims 1-6, electricity
Source and low frequency digital circuit, the power supply and the low frequency digital circuit are located at the side on the medium substrate, the micro-strip
Antenna is located at the other side opposite with the power supply and the low frequency digital circuit on the medium substrate.
8. circuit board according to claim 7, which is characterized in that the surface of the medium substrate is additionally provided with exposed gold
Belong to, the size of the bare metal is greater than the size for being provided with the region of the microstrip antenna.
9. a kind of terminal characterized by comprising shell and is set to the electricity at the circuit board being contained in the shell
On the plate of road such as microstrip antenna of any of claims 1-6, the position of the circuit board described in face on the shell
Part be made of electromagnetic wave transparent material.
10. terminal according to claim 9, which is characterized in that the electromagnetic wave transparent material with a thickness of the half of radar electromagnetic wave
A medium wavelength Xm2 times of/2, the distance between the electromagnetic wave transparent material and the circuit board value are that half of radar electromagnetic wave is empty
Gas wavelength X03 times of/2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920444237.7U CN209592319U (en) | 2019-04-02 | 2019-04-02 | Microstrip antenna, circuit board and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110972417A (en) * | 2019-12-23 | 2020-04-07 | Oppo广东移动通信有限公司 | Wave-transparent shell assembly, preparation method thereof, antenna assembly and electronic equipment |
| CN111856446A (en) * | 2020-05-22 | 2020-10-30 | 青岛若愚科技有限公司 | Network monitoring system based on millimeter wave radar and millimeter wave antenna array structure |
| CN113113773A (en) * | 2021-03-26 | 2021-07-13 | 谷波技术(常州)有限公司 | Novel anti-interference microstrip array antenna of millimeter wave radar |
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2019
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110972417A (en) * | 2019-12-23 | 2020-04-07 | Oppo广东移动通信有限公司 | Wave-transparent shell assembly, preparation method thereof, antenna assembly and electronic equipment |
| CN110972417B (en) * | 2019-12-23 | 2021-05-14 | Oppo广东移动通信有限公司 | Wave-transparent shell assembly, preparation method thereof, antenna assembly and electronic equipment |
| CN111856446A (en) * | 2020-05-22 | 2020-10-30 | 青岛若愚科技有限公司 | Network monitoring system based on millimeter wave radar and millimeter wave antenna array structure |
| CN113113773A (en) * | 2021-03-26 | 2021-07-13 | 谷波技术(常州)有限公司 | Novel anti-interference microstrip array antenna of millimeter wave radar |
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