CN206211014U - Vehicle-mounted omnidirectional's dipole antenna - Google Patents
Vehicle-mounted omnidirectional's dipole antenna Download PDFInfo
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- CN206211014U CN206211014U CN201621103300.3U CN201621103300U CN206211014U CN 206211014 U CN206211014 U CN 206211014U CN 201621103300 U CN201621103300 U CN 201621103300U CN 206211014 U CN206211014 U CN 206211014U
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Abstract
The utility model provides a kind of vehicle-mounted omnidirectional's dipole antenna, it includes that from bottom to top co-axial alignment loads the sleeve of connection, the first conductor segment, the first conveyor screw, the second conductor segment, the second conveyor screw and the 3rd conductor segment successively, and the sleeve includes the first cylindrical section, conical section, the second cylindrical section that connect from the bottom to top；The conductor segment and spiral section bend conductor segment and are connected by L-shaped, the 3rd conductor segment be placed on or not snare in the second spiral section；First cylindrical section is with diameter greater than the second cylindrical section, and the first cylindrical section diameter is consistent with the conical section lower end diameter, the second cylindrical section diameter is consistent with the conical section upper end diameter, a coaxial cable for passing through from bottom to top is provided with bushing core axis, the outer conductor of the coaxial cable is connected with sleeve top, and the inner wire of the coaxial cable extends to the connection of the first conductor segment bottom upward.The utility model makes antenna realize matched well, and gain is big, and bandwidth increases, and matching and bandwidth are significantly improved than conventional top conductor loading scheme；Gain is suitable with conventional two unit half-wave dipole arrays, but eliminates the feeding network design of complexity, reduces loss, improves efficiency, and the design size is short and small, structural strength is high, economy and durability.
Description
【Technical field】
The utility model is related to mobile communication base station/terminal antenna equipment and technology, is adapted to more particularly, to one kind vehicle-mounted
Omni-directional high-gain dipole antenna.
【Background technology】
At present, the mankind enter the information age comprehensively, obtain information as indispensable in the daily life content of people
Pith.Information technology with internet and radio communication as core has profoundly changed the production and living side of the mankind
Formula.Mobile communication is with its distinctive convenience, it has also become people obtain information and the key means for communicating with one another whenever and wherever possible.Profit
With the cellular basestation for spreading all over everywhere, 2G/3G/4G mobile communications networks realize signal wide area and continuously cover so that people are " any
Time, anywhere are communicated by any way with anyone " dream become reality substantially.It is interpersonal to realize
Free communication, and complete UNICOM is not yet realized between thing and thing, between people and thing.Information follow one's inclinations interconnect to, all things on earth,
It is only the ultimate aim of the mankind.The Internet of Things IoT (Internet of Thing) set up on the basis of Information Network is shifting of future generation
The key technology of dynamic communication technology 5G and application, such as using mobile base station signal, people can carry out remote control to vehicle,
It is unmanned so as to realize.Such as, Engineering vehicle such as cram packer, road sweeper, ore truck, cement mixing
Car, slag-soil truck can realize unmanned operation, so as to save human cost；And passenger vehicles for example bus, commercial vehicle, car,
Motor bus then can be with unmanned, so as to preferably ensure traffic safety.
Realize two big key technologies of Vehicular automatic driving：One is artificial intelligence technology, and two is wireless communication technology.The former
It is brain and commanding agency, is responsible for judging and decision-making；The latter is then knowledge and sensor, and transmission is intercepted and collected to responsible information.
In order to realize vehicle and neighbouring base station communication, car antenna is essential.Antenna is wireless communication system key subassembly, it
The good and bad influence to whole system of performance is conclusive.In vehicle-mounted LTE mobile communication system, due to vehicle motility or
Mobility, the relative position relation moment between base transmitting stations and car-mounted terminal antenna is all in change, both position relations
It is also arbitrary.Therefore, both sides are both needed to obtain good when mounting omnidirectional antenna just can guarantee that and be in each other any position relation
Good communication efficiency.Further, since car body jolts rocking, car antenna structure must be sufficiently solid, could be durable in use.Single/
Dipole antenna is the most frequently used single polarization omnidirectional antenna, but gain is relatively low.In order to improve gain, list/dipole antenna is usual
By multiple units coaxial alinement battle array, or composition planar array and rearmounted reflecting plate further improves gain, then line up round battle array
To realize that omnidirectional covers.Such array antenna size is larger, design complicated, relatively costly, is suitable for the room that wide area is continuously covered
Outer large-scale macro base station antenna.And terminal device is due to volume, size-constrained, the typically directly direct structure on list/doublet unit
Array is made to obtain higher gain.Realization principle is made on the electric current more piece straight conductor in single antenna section by phase inverter
Keep in the same direction, so as to obtain the high-gain equivalent with conventional arrays.Way of realization has lump loading, wire bending, narrow ring to load
With spiral loading etc..Lump loading loss is big, loss in efficiency is serious, is usually used in miniaturization reception antenna design；Wire bending is damaged
Consume smaller, radiation interference compared with strong, larger size, narrower bandwidth, be easier to matching；The loading loss of narrow ring is smaller, radiation relatively interference compared with
Weak, size is bigger than normal, narrower bandwidth, be easier to matching；Spiral loading be lost low, radiation interference it is weak, size is small, narrow bandwidth, more difficult
Match somebody with somebody, but can be high by solid conductor coiling, structural strength, it is durable in use.In summary, inverter design be realize high-gain list/
The key of doublet unit array.And existing spiral loading narrow bandwidth, matching poor, its matching degree, gain size still fail to expire
Foot needs.
Therefore it provides a kind of superior performance, size be short and small, firm in structure, economy and durability, interference less, low, matching degree is lost
Vehicle-mounted omnidirectional's terminal antenna high is actually necessary.
【The content of the invention】
The purpose of this utility model is to provide a kind of superior performance, size short and small, firm in structure vehicle-mounted omnidirectional's dipole
Sub-antenna.
To realize the utility model purpose, there is provided following technical scheme：
The utility model provides a kind of vehicle-mounted omnidirectional's dipole antenna, and it includes the from bottom to top co-axial alignment company of loading successively
Sleeve, the first conductor segment, the first conveyor screw, the second conductor segment, the second conveyor screw and the 3rd conductor segment for connecing, the sleeve include by
Under supreme connection the first cylindrical section, conical section, the second cylindrical section, first cylindrical section with diameter greater than the second cylindrical section, and should
First cylindrical section diameter is consistent with the conical section lower end diameter, and the second cylindrical section diameter is consistent with the conical section upper end diameter,
A coaxial cable for passing through from bottom to top is provided with bushing core axis, outer conductor and the sleeve top of the coaxial cable connect
Connect, the inner wire of the coaxial cable extends to the connection of the first conductor segment bottom upward；The sleeve top and the first conductor segment bottom
End is close to each other, and the first conductor segment top is connected with the first conveyor screw bottom, and the first conveyor screw top second is led with this
Body section bottom connection, the second conductor segment top is connected with the bottom of second conveyor screw, and the 3rd conductor segment bottom is led with second
The top connection of body section, and be placed on inside the second conveyor screw, or, the second conductor segment top connects with the top of second conveyor screw
While connecing, the bottom of the 3rd conductor segment is connected, the second conveyor screw is curled up down with the second conductor segment as axis.
The utility model overcomes its narrow bandwidth, the shortcoming of matching difference, by bottom while spiral phase inverter advantage is retained
Straight floor becomes vertical sleeve, and conductor interlude and end load spiral, antenna is realized matched well, gain simultaneously
Greatly, bandwidth increases；Gain is suitable with conventional two unit half-wave dipole arrays, but eliminates the feeding network design of complexity, reduces
Loss, improves efficiency.And, the design size is short and small, structural strength is high, economy and durability, is to be adapted to Engineering vehicle
Preferable terminal class antenna.The loading of 3rd conductor segment is connected to the second conductor segment top.Conductor top simultaneously load spiral and
Conducting line segment, makes antenna realize matched well, and gain is big, and bandwidth increases, and matching and bandwidth are than conventional top conductor loading side
Case is significantly improved；Gain is suitable with conventional two unit half-wave dipole arrays, but eliminates the feeding network design of complexity, reduces
Loss, improves efficiency.
Preferably, sleeve outer wall total length L s is 0.15 λc~0.25 λc, bottom diameter is 0.01 λc~
0.1·λc, top end diameter is more than or equal to the coaxial cable outer conductor external diameter, wherein λcCentered on wavelength.
The straight floor in bottom is become the λ of length about 0.25 by the utility modelcVertical sleeve, so as to enhance level side
To gain, antenna is realized 50 Ω matched wells in LTE frequency ranges (1820MHz-2020MHz), nearly 1.5 λ c electrical length
(|S11|<- 10dB, minimum reaches -25.4dB).
Preferably, the sleeve wall thickness is less than sleeve tip radius more than 0.
Preferably, the first conductor segment length is 0.15 λc~0.25 λc, wherein λcCentered on wavelength, upper end has
The angle of one L-shaped bending segment, the first L-shaped bending segment and the first conductor segment vertical portion is 62 °~70 ° or 110 °~118 °.
Preferably, the first conveyor screw line footpath is 0.03 λc~0.09 λc, the number of turns be 2.0-2.8, lift angle be 10 °~
16 °, it is connected to the top of the first conductor segment upper end L-shaped bending segment.
Preferably, the second conductor segment length is 0.48 λc~0.52 λc, two ends are provided with the second L-shaped bending segment, up and down
The horizontal plane angle of the second L-shaped bending segment at two ends is 90 °, is in mutually antarafacial right angle.
Preferably, the second conveyor screw line footpath is 0.03 λc~0.09 λc, the number of turns be 2.0-2.8, lift angle be 10 °~
16 °, it is connected to the top of the second L-shaped bending segment of the second conductor segment upper end.
Preferably, the 3rd conductor segment line footpath is 0.01 λc~0.10 λc, length is 0.20 λc~0.30 λc,
Vertically upward.
Preferably, the coaxial cable be with SMA, BNC, TNC, N-type connector 50 Ω coaxial cables.
Preferably, the sleeve, the first conductor segment, the first conveyor screw, the second conductor segment, the second conveyor screw, the 3rd conductor segment
It is fine copper or copper alloy or aluminum makes.
The utility model also provides a kind of vehicle-mounted omnidirectional's dipole antenna, and it includes that from bottom to top co-axial alignment is loaded successively
The sleeve of connection, the first conductor segment, the first conveyor screw, the second conductor segment, the second conveyor screw, the sleeve include connecting from the bottom to top
The first cylindrical section, conical section, the second cylindrical section, first cylindrical section is with diameter greater than the second cylindrical section, and first cylindrical section
Diameter is consistent with the conical section lower end diameter, and the second cylindrical section diameter is consistent with the conical section upper end diameter, in bushing core
Axis is provided with a coaxial cable for passing through from bottom to top, and the outer conductor of the coaxial cable is connected with sleeve top, and this is coaxial
The inner wire of cable extends to the connection of the first conductor segment bottom upward；The sleeve top is leaned on each other with the first conductor segment bottom
Closely, the first conductor segment top is connected with the first conveyor screw bottom, the first conveyor screw top and the second conductor segment bottom
Connection, the second conductor segment top is connected with the top of second conveyor screw, the second conveyor screw with the second conductor segment be axis court
Under curl up.
Contrast prior art, the utility model has advantages below：
The utility model overcomes its narrow bandwidth, the shortcoming of matching difference, uniquely while spiral phase inverter advantage is retained
Using following method for designing：1st, the straight floor in bottom is become into the λ of length about 0.25cVertical sleeve, so as to enhance level
The gain in direction；2nd, conductor interlude loading spiral, loads upper and lower cylindrical screw, such as straight by selecting suitable helix parameter
Footpath is 0.03 λc~0.09 λc, the number of turns be 2.0-2.8, lift angle be 10 °~16 °, with realize with interior radiation level point to；3、
Conductor top loads spiral and conducting line segment simultaneously, to improve with interior matching, spread bandwidth and improve gain；4th, it is upper and lower by selection
Length (about 0.50 λ respectively of L-shaped conductor segmentc、0.25·λc), line footpath (0.01 λc~0.10 λc) and bending angle
(62 °~70 ° or 110 °~118 °), to realize wide bandwidth and horizontal high-gain；5th, solid conductor coiling is formed, structural strength
Height, economy and durability.Make antenna in LTE frequency ranges (1820MHz-2020MHz), nearly 1.5 λc50 Ω are realized in electrical length good
Matching (| S11|<- 10dB, minimum reaches -25.4dB), gain reaches 4.5dBi, and with a width of 10.5%, matching and bandwidth are than routine
Top conductor loading scheme significantly improve (| S11| maximum improves 15dB)；Gain is suitable with conventional two unit half-wave dipole arrays,
But the feeding network design of complexity is eliminated, loss is reduced, efficiency (>=89%) is improve.And, the design size is short and small,
Structural strength is high, economy and durability, is the preferable terminal class antenna for being adapted to Engineering vehicle.In addition, the method also has thinking new
Grain husk, clear principle, method be pervasive, it is simple and easy to apply the features such as, design for the list/dipole omnidirectional antenna of more high-gain and change
Enter is also to be applicable and effective.
【Brief description of the drawings】
Fig. 1 is the signal of the rectangular coordinate system definition that the vehicle-mounted omnidirectional's dipole antenna of the utility model sets up model use
Figure；
Fig. 2 is the XOZ plan views of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model；
Fig. 3 is the YOZ plan views of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model；
Fig. 4 is the schematic diagram of the vehicle-mounted omnidirectional's dipole antenna embodiment two of the utility model；
Fig. 5 is the schematic diagram of the vehicle-mounted omnidirectional's dipole antenna embodiment three of the utility model；
Fig. 6 is the input impedance Z of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility modelinFrequency characteristic.
Fig. 7 is the reflection system of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model and conventional omnidirectional dipole antenna
Number | S11| curve comparison figure.
Fig. 8 is the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model in fLThe real gain 2D side of=1.82GHz
Xiang Tu.
Fig. 9 is the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model in fCThe real gain 2D directions of=1.91GHz
Figure.
Figure 10 is the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model in fHThe real gain 2D directions of=2.02GHz
Figure.
Figure 11 is the real gain G of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility modelRWith frequency f change curves.
Figure 12 is the E faces half-power beam width HPBW of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model with frequency
Rate f change curves.
Figure 13 is the H faces out-of-roundness of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model with frequency f change curves.
Figure 14 is the efficiency eta of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility modelAWith frequency f change curves.
【Specific embodiment】
Fig. 1~3 are referred to, is illustrated by taking the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model as an example, this practicality is new
Type provides a kind of vehicle-mounted omnidirectional's dipole antenna, and it includes that from bottom to top co-axial alignment loads the sleeve 6 of connection, first leads successively
The 1, first conveyor screw 2 of body section, the second conductor segment 3, the second conveyor screw 4, and loading are connected to the of the second conductor segment top
Three conductor segments 5.The sleeve includes the first cylindrical section 61, conical section 62, the second cylindrical section 63 that connect from the bottom to top, first circle
Shell of column is with diameter greater than the second cylindrical section, and the first cylindrical section diameter is consistent with the conical section lower end diameter, second cylindrical section
Diameter is consistent with the conical section upper end diameter, and a coaxial cable 7 for passing through from bottom to top is provided with bushing core axis, should
The outer conductor of coaxial cable is connected with sleeve top, and the inner wire of the coaxial cable extends to the first conductor segment bottom company upward
Connect.
Incorporated by reference to Fig. 4 and Fig. 5 is participated in, the vehicle-mounted omnidirectional's dipole antenna of the utility model can also have other embodiment.
In the first embodiment shown in Fig. 3, specific connected mode, the top of sleeve 6 is connected with the bottom of the first conductor segment 1, and this
The top of one conductor segment 1 is connected with the bottom of the first conveyor screw 2, and the top of the first conveyor screw 2 connects with the bottom of the second conductor segment 3
Connect, the top of the second conductor segment 3 is connected with the bottom of the second conveyor screw 4, while the top of the second conductor segment 3 and the bottom of the 3rd conductor segment 5
End connection.
In a second embodiment, as shown in figure 4, the top of the second conductor segment 3 is connected with the top of second conveyor screw 4,
Second conveyor screw 4 is set downwards around the second conductor segment 3, while the top of the second conductor segment 3 is connected with the bottom of the 3rd conductor segment 5.
In the third embodiment, as shown in figure 5, the top of the second conductor segment 3 is connected with the top of second conveyor screw 4,
Second conveyor screw 4 is set downwards around the second conductor segment 3.
It can be that the 3rd conductor segment 5 is save on the basis of first embodiment that the utility model also has another embodiment.
Incorporated by reference to Fig. 1~5 are participated in, the mode that vehicle-mounted omnidirectional's dipole antenna builds is using the rectangular co-ordinate shown in Fig. 1
System defines to set up model, specifically, step one, sets up rectangular coordinate system in space, sees Fig. 1；
Step 2, in XOZ planes, construction one is respectively the second cylindrical section, conical section, the first cylindrical section from top to bottom,
The metal sleeve 6 that diameter increases successively, the outer wall total length L of sleeve 6sIt is 0.15 λc~0.25 λc, nearly 0.25 λc(λcFor in
Cardiac wave is long), bottom diameter is 0.01 λc~0.1 λc, top end diameter is more than or equal to the coaxial cable outer conductor external diameter, the set
Barrel is thick to be less than sleeve tip radius more than 0, sees Fig. 2 and Fig. 3；
Step 3, is D with line footpath in the top end of sleeve 6 of step 2wPlain conductor construction one save the first conductor segment
1, first conductor segment 1 length is about 0.15 λc~0.25 λc, preferably nearly 0.25 λc, wherein λcCentered on wavelength, upper end has
The angle of the first L-shaped bending segment 11, the first L-shaped bending segment 11 and the first conductor segment vertical portion 12 is 62 °~70 ° or 110 °
~118 °；
Step 4, is D with line footpath on the top of the first conductor segment 1 of step 3wPlain conductor construction one save dextrorotation upward
Or left-handed cylindrical screw, that is, first conveyor screw 2, the line footpath of the first conveyor screw 2 is 0.03 λc~0.09 λc、
The number of turns is that 2.0-2.8, lift angle are 10 °~16 °, is connected to the top of the upper end L-shaped bending segment 11 of the first conductor segment 1；
Step 5, is D with line footpath on the top of the first conveyor screw 2 of step 4wPlain conductor construct one section of equal L in two ends
The conductor segment of shape bending, that is, second conductor segment 3, the length of the second conductor segment 3 are 0.48 λc~0.52 λc, two
End is provided with the second L-shaped bending segment 31, and the horizontal plane angle of the second L-shaped bending segment of upper and lower ends is 90 °, is in mutually antarafacial right angle；
Step 6, on the top of the second conductor segment 3 of step 5, one nodel line footpath of loading is Dw, dextrorotation upward or left-handed cylinder
Spiral, that is, the second conveyor screw 4 described in Fig. 3, or loading one save dextrorotation down or left-handed cylindrical screw, that is, Fig. 4,5
Second conveyor screw 4, the second conveyor screw line footpath is 0.03 λc~0.09 λc, the number of turns be 2.0-2.8, lift angle be 10 °~
16 °, it is connected to the top of the second L-shaped bending segment 31 of the upper end of the second conductor segment 3.
Further, step 7, on the top of the second conductor segment 3 of step 5, one nodel line footpath of loading is Dw, vertically upward
Conductor segment, that is, the 3rd conductor segment 5, are shown in Fig. 3, Fig. 5, and the line footpath of the 3rd conductor segment 5 is 0.01 λc~0.10 λc,
Length is 0.20 λc~0.30 λc, vertically upward.
Step 8, on the central axis of metal sleeve 1 of step 2, from bottom to top through a 50 Ω coaxial lines, also
It is the coaxial cable 7, its outer conductor disconnects on the top of sleeve 1 and is welded as a whole therewith, and inner wire then extends to step upward
Rapid three bottom of the first conductor segment 1 is simultaneously welded therewith, and the coaxial cable 7 carries SMA, BNC, TNC, N-type connector.
The sleeve 6, the first conductor segment 1, the first conveyor screw 2, the second conductor segment 3, the second conveyor screw 4, the 3rd conductor segment 5 are equal
For fine copper or copper alloy or aluminum make.
Fig. 6 is the input impedance Z of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility modelinFrequency characteristic.Its
In, transverse axis (X-axis) is frequency f, and unit is GHz；The longitudinal axis (Y-axis) is input impedance Zin, unit is Ω；Solid line represents real part Rin,
Dotted line represents imaginary part Xin。
Fig. 7 is the reflection system of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model and conventional omnidirectional dipole antenna
Number | S11| curve comparison figure.Wherein, solid line represents scheme one | S11|, dotted line represents conventional loading | S11|；Transverse axis (X-axis)
It is frequency f, unit is GHz；The longitudinal axis (Y-axis) is S11Amplitude | S11|, unit is dB.Known by figure, embodiment one is in LTE frequency ranges
(1.82-2.02GHz) realize good impedance matching (| S11|≤- 10dB, BW=10.42%；Best match | S11|=-
25.4dB 1.91GHz), and conventional top loads the reflectance factor of center frequency point | S11| only -10dB.Obviously, the top of scheme one
The bandwidth of spiral and conductor segment Combined Loading mode and to match improvement notable.
Fig. 8 is the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model in fLThe real gain 2D side of=1.82GHz
Xiang Tu.Wherein, solid line represents H- faces (Theta=90 °, XOY plane) in figure, and dotted line represents E- faces (Phi=0 °, XOZ planes)；
Gain G=4.40dBi, HPBW=38 ° of E faces half-power beam width, the first secondary lobe SLL is less than main lobe level 9.0dB.
Fig. 9 is the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model in fCThe real gain 2D directions of=1.91GHz
Figure.Wherein, solid line represents H- faces (Theta=90 °, XOY plane), and dotted line represents E- faces (Phi=0 °, XOZ planes)；Gain G
HPBW=38.8 ° of=4.18dBi, E face half-power beam width, the first secondary lobe SLL is less than main lobe level 8.7dB.
Figure 10 is the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model in fHThe real gain 2D directions of=2.02GHz
Figure.Wherein, solid line represents H- faces (Theta=90 °, XOY plane), and dotted line represents E- faces (Phi=0 °, XOZ planes)；Gain G
HPBW=38.5 ° of=4.04dBi, E face half-power beam width, the first secondary lobe SLL is less than main lobe level 8.2dB.
Figure 11 is the real gain G of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility modelRWith frequency f change curves.
Wherein, transverse axis (X-axis) is frequency f, and unit is GHz；The longitudinal axis (Y-axis) is real gain GR, unit is dBi.It is real to increase in whole frequency band
Beneficial GR=4.0-4.5dBi, close to two unit half-wave dipole array gains (about 5.0dBi).
Figure 12 is the E faces half-power beam width HPBW of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model with frequency
Rate f change curves.Known by figure, in whole frequency band, HPBW=38 ° -39 ° of E faces.
Figure 13 is the H faces out-of-roundness of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility model with frequency f change curves.
Known by figure, in whole frequency band, H faces directional diagram out-of-roundness (omni-directional or uniformity) are less than 0.06dB, this explanation spiral loading is right
Directional diagram horizontal omnidirectional influences very little.
Figure 14 is the efficiency eta of the vehicle-mounted omnidirectional's dipole antenna embodiment one of the utility modelAWith frequency f change curves.By
Figure is known, in whole frequency band, the efficiency of antenna is more than 89% (reaching as high as 99.95%).
The provable the utility model of data above and chart overcomes its bandwidth while spiral phase inverter advantage is retained
Narrow, matching difference shortcoming, makes antenna realize matched well, and gain is big, and bandwidth increases；Gain and conventional two unit half-wave dipoles
Array quite, but eliminates the feeding network design of complexity, reduces loss, improves efficiency.And, the design size is short
Small, structural strength is high, economy and durability, is the preferable terminal class antenna for being adapted to Engineering vehicle.
Preferred embodiment of the present utility model is the foregoing is only, protection domain of the present utility model is not limited thereto,
Any equivalent transformation based in technical solutions of the utility model is belonged within the utility model protection domain.
Claims (9)
1. a kind of vehicle-mounted omnidirectional's dipole antenna, it is characterised in that it includes that from bottom to top co-axial alignment loads connection successively
Sleeve, the first conductor segment, the first conveyor screw, the second conductor segment, the second conveyor screw, the 3rd conductor segment, the sleeve include by it is lower extremely
First cylindrical section of upper connection, conical section, the second cylindrical section, first cylindrical section with diameter greater than the second cylindrical section, and this first
Cylindrical section diameter is consistent with the conical section lower end diameter, and the second cylindrical section diameter is consistent with the conical section upper end diameter, in set
Cylinder central axis is provided with a coaxial cable for passing through from bottom to top, and the outer conductor of the coaxial cable is connected with sleeve top,
The inner wire of the coaxial cable extends to the connection of the first conductor segment bottom upward, the sleeve top and the first conductor segment bottom that
This is close to, and the first conductor segment top is connected with the first conveyor screw bottom, the first conveyor screw top and second conductor segment
Bottom connects, and the second conductor segment top is connected with the bottom of second conveyor screw, the 3rd conductor segment bottom and the second conductor segment
Top connects, and is placed on inside the second conveyor screw, or, what the second conductor segment top was connected with the top of second conveyor screw
Meanwhile, the bottom of the 3rd conductor segment is connected, the second conveyor screw is curled up down with the second conductor segment as axis.
2. vehicle-mounted omnidirectional's dipole antenna as claimed in claim 1, it is characterised in that sleeve outer wall total length L s is
0.15·λc~0.25 λc, bottom diameter is 0.01 λc~0.1 λc, top end diameter is more than or equal to outside the coaxial cable to be led
External footpath, wherein λcCentered on wavelength, the sleeve wall thickness more than 0 and be less than sleeve tip radius.
3. vehicle-mounted omnidirectional's dipole antenna as claimed in claim 1, it is characterised in that the first conductor segment length is 0.15
λc~0.25 λc, wherein λcCentered on wavelength, there is the first L-shaped bending segment upper end, the first L-shaped bending segment and the first conductor segment
The angle of vertical portion is 62 °~70 ° or 110 °~118 °.
4. vehicle-mounted omnidirectional's dipole antenna as claimed in claim 1, it is characterised in that the first conveyor screw line footpath is 0.03
λc~0.09 λc, the number of turns be 2.0-2.8, lift angle be 10 °~16 °, be connected to the top of the first conductor segment upper end L-shaped bending segment.
5. vehicle-mounted omnidirectional's dipole antenna as claimed in claim 1, it is characterised in that the second conductor segment length is 0.48
λc~0.52 λc, two ends are provided with the second L-shaped bending segment, and the horizontal plane angle of the second L-shaped bending segment of upper and lower ends is 90 °, mutually
In antarafacial right angle.
6. vehicle-mounted omnidirectional's dipole antenna as claimed in claim 1, it is characterised in that the second conveyor screw line footpath is 0.03
λc~0.09 λc, the number of turns be 2.0-2.8, lift angle be 10 °~16 °, be connected to the second L-shaped bending segment of the second conductor segment upper end
Top.
7. vehicle-mounted omnidirectional's dipole antenna as claimed in claim 1, it is characterised in that the 3rd conductor segment line footpath is 0.01
λc~0.10 λc, length is 0.20 λc~0.30 λc, vertically upward.
8. vehicle-mounted omnidirectional's dipole antenna as claimed in claim 1, it is characterised in that the coaxial cable be band SMA, BNC,
The 50 Ω coaxial cables of TNC, N-type connector.
9. a kind of vehicle-mounted omnidirectional's dipole antenna, it is characterised in that it includes that from bottom to top co-axial alignment loads connection successively
Sleeve, the first conductor segment, the first conveyor screw, the second conductor segment, the second conveyor screw, the sleeve include connect from the bottom to top first
Cylindrical section, conical section, the second cylindrical section, first cylindrical section with diameter greater than the second cylindrical section, and the first cylindrical section diameter with
The conical section lower end diameter is consistent, and the second cylindrical section diameter is consistent with the conical section upper end diameter, on bushing core axis
A coaxial cable for passing through from bottom to top is provided with, the outer conductor of the coaxial cable is connected with sleeve top, the coaxial cable
Inner wire extends to the connection of the first conductor segment bottom upward；The sleeve top is close to each other with the first conductor segment bottom, and this
One conductor segment top is connected with the first conveyor screw bottom, and the first conveyor screw top is connected with the second conductor segment bottom, should
Second conductor segment top is connected with the top of second conveyor screw, and the second conveyor screw is curled up down with the second conductor segment as axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621103300.3U CN206211014U (en) | 2016-09-30 | 2016-09-30 | Vehicle-mounted omnidirectional's dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113555690A (en) * | 2020-04-23 | 2021-10-26 | 华为技术有限公司 | Electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113555690A (en) * | 2020-04-23 | 2021-10-26 | 华为技术有限公司 | Electronic equipment |
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