CN106450694A - Vehicle-mounted all-around dipole antenna - Google Patents
Vehicle-mounted all-around dipole antenna Download PDFInfo
- Publication number
- CN106450694A CN106450694A CN201610877003.2A CN201610877003A CN106450694A CN 106450694 A CN106450694 A CN 106450694A CN 201610877003 A CN201610877003 A CN 201610877003A CN 106450694 A CN106450694 A CN 106450694A
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- Prior art keywords
- conductor segment
- conductor
- vehicle
- sleeve
- dipole antenna
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3216—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used where the road or rail vehicle is only used as transportation means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
- H01Q9/27—Spiral antennas
Abstract
The invention discloses a vehicle-mounted all-around dipole antenna. The vehicle-mounted all-around dipole antenna comprises a sleeve, a first conductor section, a first spiral body, a second conductor section, a second spiral body and a third conductor section which are coaxially arranged from the bottom up and are in loaded connection in sequence, wherein the sleeve comprises a first cylindrical section, a conical section and a second cylindrical section which are connected from the bottom up; the conductor sections and spiral sections are connected through L-shaped bent conductor sections; the third conductor section is nested or not nested in a second spiral section; the diameter of the first cylindrical section is greater than that of the second cylindrical section; the diameter of the first cylindrical section is consistent with that of the lower end of the conical section; the diameter of the second cylindrical section is consistent with that of the upper end of the conical section; a coaxial cable which passes through from the bottom up is arranged in the central axis of the sleeve; an outer conductor of the coaxial cable is connected with the top end of the sleeve; and an inner conductor of the coaxial cable extends upwardly to be connected with the bottom of the first conductor section. By adoption of the vehicle-mounted all-around dipole antenna, high matching, high gain and increased bandwidth of the antenna are realized; and in addition, the vehicle-mounted all-around dipole antenna is small in design dimensions, high in structural strength, economical and durable.
Description
【Technical field】
The present invention relates to mobile communication base station/terminal antenna equipment and technology, especially relate to a kind of be suitable for vehicle-mounted complete
To high-gain dipole antenna.
【Background technology】
At present, the mankind have entered the information age comprehensively, obtain information and become indispensable in people's life content every day
Pith.With internet and radio communication, the information technology as core has profoundly changed the productive life side of the mankind
Formula.Mobile communication is with its distinctive convenience, it has also become people obtain information and the key means communicating with one another whenever and wherever possible.Profit
With the cellular basestation spreading all over everywhere, 2G/3G/4G mobile communications network achieves signal wide area and covers continuously so that people are " arbitrarily
Time, anywhere communicate by any way with anyone " dream substantially become reality.Interpersonal realization
Free communication, and between thing and thing, not yet realize complete UNICOM between people and thing.Information follow one's inclinations interconnect to, all things on earth,
It is only the ultimate aim of the mankind.Setting up the Internet of Things IoT (Internet of Thing) on the basis of Information Network is of future generation shifting
The key technology of dynamic communication technology 5G and application, for example, utilize mobile base station signal, and vehicle can remotely be controlled by people,
Thus realize unmanned.Such as, Engineering vehicle such as cram packer, road sweeper, ore truck, cement mixing
Car, slag-soil truck can realize unmanned operation, thus save human cost；And passenger vehicles such as bus, commercial vehicle, car,
Motor bus then can be unmanned, thus preferably ensures 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, be responsible for judging and decision-making；The latter is then knowledge and sensor, and responsible information is intercepted and collects transmission.
In order to realize that vehicle communicates with neighbouring base station, car antenna is essential.Antenna is the crucial subassembly of wireless communication system, it
Performance is good and bad is conclusive on the impact of whole system.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 at change, both position relations
It is also arbitrary.Therefore, both sides are both needed to can to obtain when mounting omnidirectional antenna guarantee is in any position relation each other good
Good communication efficiency.Rocking further, since car body jolts, 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
Be in line battle array by multiple unit coaxial row, or composition planar array rearmounted reflecting plate improve gain further, then line up round battle array
To realize that omnidirectional covers.This type of array antenna size is relatively big, it is complicated, relatively costly to design, and is suitable for the room that wide area covers continuously
Outer large-scale macro base station antenna.And terminal device is due to volume, size-constrained, typically directly direct structure on list/doublet unit
Make array to obtain higher gain.Realize that principle is, made in more piece straight conductor section in single antenna for the electric current by phase inverter
Keep in the same direction, thus obtain the high-gain with conventional arrays equivalence.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 and designs；Wire bending is damaged
Consume that less, radiation interference is relatively strong, size is relatively big, narrower bandwidth, be easier to coupling；The loading loss of narrow ring is less, radiation is relatively disturbed relatively
Weak, size is bigger than normal, narrower bandwidth, be easier to coupling；Spiral load loss low, radiation interference is weak, size is little, narrow bandwidth, more difficult
Join, but can be by solid conductor coiling, structural strength is high, durable in use.In summary, inverter design be realize high-gain list/
The key of doublet unit array.And existing spiral loaded ribbon width, coupling are poor, its matching degree, gain size still fail to expire
Foot needs.
Therefore it provides a kind of superior performance, size are short and small, firm in structure, economy and durability, interference less, low, matching degree is lost
High vehicle-mounted omnidirectional terminal antenna is actually necessary.
【Content of the invention】
It is an object of the invention to provide a kind of superior performance, size vehicle-mounted omnidirectional's dipole sky short and small, firm in structure
Line.
For realizing the object of the invention, provide techniques below scheme：
The present invention provides a kind of vehicle-mounted omnidirectional dipole antenna, and 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 and the 3rd conductor segment, this sleeve include by down to
First cylindrical section of upper connection, conical section, the second cylindrical section, this first cylindrical section diameter be more than the second cylindrical section, and this first
Cylindrical section diameter is consistent with this conical section lower end diameter, and this second cylindrical section diameter is consistent with this conical section upper end diameter, at set
Cylinder central axis is provided with a coaxial cable passing through from bottom to top, and the outer conductor of this coaxial cable is connected with sleeve top,
The inner wire of this coaxial cable extends to connect bottom the first conductor segment upward；This sleeve top and this first conductor segment bottom that
This is close, and this first conductor segment top is connected with this first conveyor screw bottom, this first conveyor screw top and this second conductor segment
Bottom connects, and this second conductor segment top is connected with this second spirochetal bottom, the 3rd conductor segment bottom and the second conductor segment
Top connects, and is placed on inside the second conveyor screw, or, this second conductor segment top is connected with this second spirochetal top
Meanwhile, connecting the bottom of the 3rd conductor segment, the second conveyor screw curls up with the second conductor segment down for axis.
The present invention, while retaining spiral phase inverter advantage, overcomes its narrow bandwidth, the shortcoming of coupling difference, and bottom is straight
Floor becomes vertical sleeve, and conductor interlude and end load spiral simultaneously, makes antenna achieve matched well, and gain is big, band
Wide increase；Gain is suitable with conventional two unit half-wave dipole arrays, but eliminates the feeding network design of complexity, reduces damage
Consumption, improves efficiency.And, this design size is short and small, structural strength is high, economy and durability, is the ideal being suitable for Engineering vehicle
Terminal class antenna.3rd conductor segment loads and is connected to this second conductor segment top.Conductor top loads spiral and wire simultaneously
Section, makes antenna achieve matched well, and gain is big, and bandwidth increases, and coupling and bandwidth all show than conventional top conductor loading scheme
Write and improve；Gain is suitable with conventional two unit half-wave dipole arrays, but eliminates the feeding network design of complexity, reduces damage
Consumption, improves efficiency.
Preferably, this 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 this coaxial cable outer conductor external diameter, wherein λcCentered on wavelength.
Straight for bottom floor is become length about 0.25 λ by the present inventioncVertical sleeve, thus enhance horizontal direction
Gain, make antenna achieve in LTE frequency range (1820MHz-2020MHz), nearly 1.5 λ c electrical length 50 Ω matched well (| S11
|<-10dB, minimum reaches-25.4dB).
Preferably, this sleeve wall thickness is more than 0 and is less than sleeve tip radius.
Preferably, a length of 0.15 λ of this first conductor segmentc～0.25 λc, wherein λcCentered on wavelength, upper end has
One L-shaped bending segment, the angle of this first L-shaped bending segment and the first conductor segment vertical portion is 62 °～70 ° or 110 °～118 °.
Preferably, this 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 °～
It 16 °, is connected to the top of the first conductor segment upper end L-shaped bending segment.
Preferably, a length of 0.48 λ of this second conductor segmentc～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 °, mutually in antarafacial right angle.
Preferably, this 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 °～
It 16 °, 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, a length of 0.20 λc～0.30 λc,
Vertically upward.
Preferably, this coaxial cable is for SMA, BNC, TNC, 50 Ω coaxial cables of N-type connector.
Preferably, this 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 present invention also provides a kind of vehicle-mounted omnidirectional dipole antenna, and 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, this sleeve includes connecting from the bottom to top
One cylindrical section, conical section, the second cylindrical section, this first cylindrical section diameter is more than the second cylindrical section, and this first cylindrical section diameter
Consistent with this conical section lower end diameter, this second cylindrical section diameter is consistent with this conical section upper end diameter, at bushing core axis
Being provided with a coaxial cable passing through from bottom to top, the outer conductor of this coaxial cable is connected with sleeve top, this coaxial cable
Inner wire extend to upward bottom the first conductor segment connect；This sleeve top is close to each other with this first conductor segment bottom, should
First conductor segment top is connected with this first conveyor screw bottom, and this first conveyor screw top is connected with this second conductor segment bottom,
This second conductor segment top is connected with this second spirochetal top, and the second conveyor screw is with the second conductor segment for axis towards backspin
Around.
Contrast prior art, the present invention has the following advantages：
The present invention, while retaining spiral phase inverter advantage, overcomes its narrow bandwidth, the shortcoming of coupling difference, uses uniquely
Following method for designing：1st, straight for bottom floor is become length about 0.25 λcVertical sleeve, thus enhance horizontal direction
Gain；2nd, conductor interlude loads spiral, loads upper and lower cylindrical screw, by selecting suitable helix parameter, as a diameter of
0.03·λc～0.09 λc, the number of turns be 2.0-2.8, lift angle be 10 °～16 °, to realize carrying interior radiation level to point to；3rd, conductor
Top loads spiral and conducting line segment simultaneously, to improve the interior coupling of band, spread bandwidth and raising gain；4th, by selecting upper and lower L-shaped
Length (about 0.50 λ respectively of conductor segmentc、0.25·λc), line footpath (0.01 λc～0.10 λc) and bending angle (62 °～
70 ° or 110 °～118 °), to achieve wide bandwidth and horizontal high-gain；5th, solid conductor coiling forms, and structural strength is high, warp
Help durable.Make antenna at LTE frequency range (1820MHz-2020MHz), nearly 1.5 λcAchieve in electrical length 50 Ω matched well (|
S11|<-10dB, minimum reaches-25.4dB), gain reaches 4.5dBi, carries a width of 10.5%, and coupling and bandwidth are all led than conventional top
Body loading scheme significantly improve (| S11| maximum improves 15dB)；Gain is suitable with conventional two unit half-wave dipole arrays, but saves
Complicated feeding network design, reduces loss, improves efficiency (>=89%).And, this design size is short and small, structure is strong
Degree is high, economy and durability, is the preferable terminal class antenna being suitable for Engineering vehicle.In addition, the method also has thinking novelty, principle
The feature such as clearly, method is pervasive, simple, the design of list/dipole omnidirectional antenna and improvement for more high-gain are also
It is suitable for and effective.
【Brief description】
Fig. 1 is the schematic diagram that the present invention vehicle-mounted omnidirectional dipole antenna sets up the rectangular coordinate system definition that model uses；
Fig. 2 is the XOZ plan view of the present invention vehicle-mounted omnidirectional dipole antenna embodiment one；
Fig. 3 is the YOZ plan view of the present invention vehicle-mounted omnidirectional dipole antenna embodiment one；
Fig. 4 is the schematic diagram of the present invention vehicle-mounted omnidirectional dipole antenna embodiment two；
Fig. 5 is the schematic diagram of the present invention vehicle-mounted omnidirectional dipole antenna embodiment three；
Fig. 6 is the input impedance Z of the present invention vehicle-mounted omnidirectional dipole antenna embodiment oneinFrequency characteristic.
Fig. 7 is the reflectance factor of the present invention vehicle-mounted omnidirectional dipole antenna embodiment one and conventional omnidirectional dipole antenna |
S11| curve comparison figure.
Fig. 8 be the present invention vehicle-mounted omnidirectional dipole antenna embodiment one at fLThe real gain 2D directional diagram of=1.82GHz.
Fig. 9 is that the present invention vehicle-mounted omnidirectional dipole antenna embodiment one is at fCThe real gain 2D directional diagram of=1.91GHz.
Figure 10 is that the present invention vehicle-mounted omnidirectional dipole antenna embodiment one is at fHThe real gain 2D directional diagram of=2.02GHz.
Figure 11 is the real gain G of the present invention vehicle-mounted omnidirectional dipole antenna embodiment oneRWith frequency f change curve.
Figure 12 is that the E face half-power beam width HPBW of the present invention vehicle-mounted omnidirectional dipole antenna embodiment one is with frequency f
Change curve.
Figure 13 is that the H face out-of-roundness of the present invention vehicle-mounted omnidirectional dipole antenna embodiment one is with frequency f change curve.
Figure 14 is the efficiency eta of the present invention vehicle-mounted omnidirectional dipole antenna embodiment oneAWith frequency f change curve.
【Detailed description of the invention】
Referring to Fig. 1～3, illustrating as a example by the present invention vehicle-mounted omnidirectional dipole antenna embodiment one, the present invention provides one
Kind of vehicle-mounted omnidirectional dipole antenna, it includes that from bottom to top co-axial alignment loads sleeve the 6th, first conductor segment of connection the 1st, the successively
One conveyor screw the 2nd, the second conductor segment the 3rd, the second conveyor screw 4, and load the 3rd conductor segment being connected to this second conductor segment top
5.This sleeve includes the first cylindrical section the 61st, conical section the 62nd, the second cylindrical section 63 connecting from the bottom to top, this first cylindrical section diameter
More than the second cylindrical section, and this first cylindrical section diameter is consistent with this conical section lower end diameter, this second cylindrical section diameter with should
Conical section upper end diameter is consistent, is provided with a coaxial cable passing through from bottom to top 7, this coaxial cable on bushing core axis
Outer conductor be connected with sleeve top, the inner wire of this coaxial cable extend to upward bottom the first conductor segment connect.
Incorporated by reference to participating in Fig. 4 and Fig. 5, the present invention vehicle-mounted omnidirectional dipole antenna can also have other embodiments.At Fig. 3
In shown first embodiment, concrete connected mode, this sleeve 6 top is connected with this first conductor segment 1 bottom, this first conductor
Section 1 top is connected with this first conveyor screw 2 bottom, and this first conveyor screw 2 top is connected with this second conductor segment 3 bottom, and this is the years old
Two conductor segment 3 tops are connected with the second conveyor screw 4 bottom, and the second conductor segment 3 top is connected with the 3rd conductor segment 5 bottom simultaneously.
In a second embodiment, as shown in Figure 4, this second conductor segment 3 top is connected with the top of this second conveyor screw 4,
Second conveyor screw 4 is downward to be arranged around the second conductor segment 3, and the second conductor segment 3 top is connected with the 3rd conductor segment 5 bottom simultaneously.
In the third embodiment, as it is shown in figure 5, this second conductor segment 3 top is connected with the top of this second conveyor screw 4,
Second conveyor screw 4 is downward to be arranged around the second conductor segment 3.
It can be to save the 3rd conductor segment 5 on the basis of first embodiment that the present invention also has another kind of embodiment.
Incorporated by reference to participating in Fig. 1～5, the mode that this vehicle-mounted omnidirectional dipole antenna builds uses the rectangular co-ordinate shown in Fig. 1
Be definition to set up model, specifically, step one, set up rectangular coordinate system in space, see Fig. 1；
Step 2, in XOZ plane, constructs one and is respectively the second cylindrical section, conical section, the first cylindrical section from top to bottom,
The metal sleeve 6 that diameter increases successively, sleeve 6 outer wall total length LsIt is 0.15 λc～0.25 λc, nearly 0.25 λc(λcIn for
Cardiac wave length), bottom diameter is 0.01 λc～0.1 λc, top end diameter is more than or equal to this coaxial cable outer conductor external diameter, this set
Barrel is thick to be more than 0 and is less than sleeve tip radius, sees Fig. 2 and Fig. 3；
Step 3, at sleeve 6 top end of step 2, is D with line footpathwPlain conductor construction one joint the first conductor segment
1, this first conductor segment 1 is long is about 0.15 λc～0.25 λc, preferably nearly 0.25 λc, wherein λcCentered on wavelength, upper end has
First L-shaped bending segment 11, the angle of this first L-shaped bending segment 11 and the first conductor segment vertical portion 12 is 62 °～70 ° or 110 °
～118 °；
Step 4, on the first conductor segment 1 top of step 3, is D with line footpathwPlain conductor construction one save dextrorotation upward
Or left-handed cylindrical screw, namely described first conveyor screw 2, this first conveyor screw 2 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 1 upper end L-shaped bending segment 11；
Step 5, on the first conveyor screw 2 top of step 4, is D with line footpathwPlain conductor construct the equal L in one section of two ends
The conductor segment of shape bending, namely described second conductor segment 3, a length of 0.48 λ of this second conductor segment 3c～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 at upper and lower two ends is 90 °, mutually in antarafacial right angle；
Step 6, on the second conductor segment 3 top of step 5, loading a nodel line footpath is Dw, dextrorotation upward or left-handed cylinder
Spiral, namely the second conveyor screw 4 described in Fig. 3, or load one and save dextrorotation down or left-handed cylindrical screw, namely Fig. 4,5
Described second conveyor screw 4, this 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 °～
It 16 °, is connected to the top of the second L-shaped bending segment 31 of the second conductor segment 3 upper end.
Further, step 7, on the second conductor segment 3 top of step 5, loading a nodel line footpath is Dw, vertically upward
Conductor segment, namely described 3rd conductor segment 5, see Fig. 3, Fig. 5, the 3rd conductor segment 5 line footpath is 0.01 λc～0.10 λc,
A length of 0.20 λc～0.30 λc, vertically upward.
Step 8, on metal sleeve 1 central axis of step 2, passes through 50 Ω coaxial lines, also from bottom to top
Being described coaxial cable 7, its outer conductor disconnects on sleeve 1 top and is welded as a whole therewith, and inner wire then extends to step upward
Bottom first conductor segment 1 of rapid three and welding therewith, this coaxial cable 7 is with SMA, BNC, TNC, N-type connector.
This sleeve the 6th, the first conductor segment the 1st, the first conveyor screw the 2nd, the second conductor segment the 3rd, the second conveyor screw the 4th, the 3rd conductor segment 5 is equal
It is fine copper or copper alloy or aluminum makes.
Fig. 6 is the input impedance Z of the present invention vehicle-mounted omnidirectional dipole antenna embodiment oneinFrequency characteristic.Wherein, horizontal
Axle (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
Represent imaginary part Xin.
Fig. 7 is the reflectance factor of the present invention vehicle-mounted omnidirectional dipole antenna embodiment one and conventional omnidirectional dipole antenna |
S11| curve comparison figure.Wherein, solid line represents scheme one | S11|, dotted line represents conventional loading | S11|；Transverse axis (X-axis) is frequency
Rate f, unit is GHz；The longitudinal axis (Y-axis) is S11Amplitude | S11|, unit is dB.Being known by figure, embodiment one is in LTE frequency range
(1.82-2.02GHz) achieve good impedance matching (| S11|≤-10dB, BW=10.42%；Optimal coupling | 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
Spiral and the bandwidth of conductor segment Combined Loading mode and mate that to improve effect notable.
Fig. 8 be the present invention vehicle-mounted omnidirectional dipole antenna embodiment one at fLThe real gain 2D directional diagram of=1.82GHz.
Wherein, in figure, solid line represents H-face (Theta=90 °, XOY plane), and dotted line represents E-face (Phi=0 °, XOZ plane)；Gain G
=4.40dBi, E face half-power beam width HPBW=38 °, the first secondary lobe SLL is less than main lobe level 9.0dB.
Fig. 9 is that the present invention vehicle-mounted omnidirectional dipole antenna embodiment one is at fCThe real gain 2D directional diagram of=1.91GHz.Its
In, solid line represents H-face (Theta=90 °, XOY plane), and dotted line represents E-face (Phi=0 °, XOZ plane)；Gain G=
4.18dBi, E face half-power beam width HPBW=38.8 °, the first secondary lobe SLL is less than main lobe level 8.7dB.
Figure 10 is that the present invention vehicle-mounted omnidirectional dipole antenna embodiment one is at fHThe real gain 2D directional diagram of=2.02GHz.
Wherein, solid line represents H-face (Theta=90 °, XOY plane), and dotted line represents E-face (Phi=0 °, XOZ plane)；Gain G=
4.04dBi, E face half-power beam width HPBW=38.5 °, the first secondary lobe SLL is less than main lobe level 8.2dB.
Figure 11 is the real gain G of the present invention vehicle-mounted omnidirectional dipole antenna embodiment oneRWith frequency f change curve.Wherein,
Transverse axis (X-axis) is frequency f, and unit is GHz；The longitudinal axis (Y-axis) is real gain GR, unit is dBi.In whole frequency band, real gain GR=
4.0-4.5dBi, close to two unit half-wave dipole array gains (about 5.0dBi).
Figure 12 is that the E face half-power beam width HPBW of the present invention vehicle-mounted omnidirectional dipole antenna embodiment one is with frequency f
Change curve.Known by figure, in whole frequency band, HPBW=38 °-39 ° of E face.
Figure 13 is that the H face out-of-roundness of the present invention vehicle-mounted omnidirectional dipole antenna embodiment one is with frequency f change curve.By scheming
Knowing, in whole frequency band, H face directional diagram out-of-roundness (omni-directional or uniformity) is less than 0.06dB, and this explanation spiral loads to direction
The impact of figure horizontal omnidirectional is very little.
Figure 14 is the efficiency eta of the present invention vehicle-mounted omnidirectional dipole antenna embodiment oneAWith frequency f change curve.Known by figure,
In whole frequency band, the efficiency of antenna is more than 89% (reaching as high as 99.95%).
The all provable present invention of data above and chart retain spiral phase inverter advantage while, overcome its narrow bandwidth,
The shortcoming of coupling difference, makes antenna achieve matched well, and gain is big, and bandwidth increases；Gain and conventional two unit half-wave dipole battle arrays
Row quite, but eliminate the feeding network design of complexity, reduce loss, improve efficiency.And, this design size is short and small,
Structural strength is high, economy and durability, is the preferable terminal class antenna being suitable for Engineering vehicle.
The foregoing is only presently preferred embodiments of the present invention, protection scope of the present invention is not limited thereto, any based on
Equivalent transformation in technical solution of the present invention belongs within scope.
Claims (9)
1. a vehicle-mounted omnidirectional 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, this sleeve include by down to
First cylindrical section of upper connection, conical section, the second cylindrical section, this first cylindrical section diameter be more than the second cylindrical section, and this first
Cylindrical section diameter is consistent with this conical section lower end diameter, and this second cylindrical section diameter is consistent with this conical section upper end diameter, at set
Cylinder central axis is provided with a coaxial cable passing through from bottom to top, and the outer conductor of this coaxial cable is connected with sleeve top,
The inner wire of this coaxial cable extends to connect bottom the first conductor segment upward, this sleeve top and this first conductor segment bottom that
This is close, and this first conductor segment top is connected with this first conveyor screw bottom, this first conveyor screw top and this second conductor segment
Bottom connects, and this second conductor segment top is connected with this second spirochetal bottom, the 3rd conductor segment bottom and the second conductor segment
Top connects, and is placed on inside the second conveyor screw, or, this second conductor segment top is connected with this second spirochetal top
Meanwhile, connecting the bottom of the 3rd conductor segment, the second conveyor screw curls up with the second conductor segment down for axis.
2. vehicle-mounted omnidirectional as claimed in claim 1 dipole antenna, it is characterised in that this 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 led more than or equal to outside this coaxial cable
External footpath, wherein λcCentered on wavelength, this sleeve wall thickness be more than 0 and be less than sleeve tip radius.
3. vehicle-mounted omnidirectional as claimed in claim 1 dipole antenna, it is characterised in that this first conductor segment a length of 0.15
λc～0.25 λc, wherein λcCentered on wavelength, there is the first L-shaped bending segment upper end, this 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 as claimed in claim 1 dipole antenna, it is characterised in that this 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 as claimed in claim 1 dipole antenna, it is characterised in that this second conductor segment a length of 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 at upper and lower two ends is 90 °, mutually
In antarafacial right angle.
6. vehicle-mounted omnidirectional as claimed in claim 1 dipole antenna, it is characterised in that this 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 as claimed in claim 1 dipole antenna, it is characterised in that the 3rd conductor segment line footpath is 0.01
λc～0.10 λc, a length of 0.20 λc～0.30 λc, vertically upward.
8. vehicle-mounted omnidirectional as claimed in claim 1 dipole antenna, it is characterised in that this coaxial cable for band SMA, BNC,
TNC, 50 Ω coaxial cables of N-type connector.
9. a vehicle-mounted omnidirectional 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, this sleeve includes first connecting from the bottom to top
Cylindrical section, conical section, the second cylindrical section, this first cylindrical section diameter be more than the second cylindrical section, and this first cylindrical section diameter with
This conical section lower end diameter is consistent, and this second cylindrical section diameter is consistent with this conical section upper end diameter, on bushing core axis
Being provided with a coaxial cable passing through from bottom to top, the outer conductor of this coaxial cable is connected with sleeve top, this coaxial cable
Inner wire extends to connect bottom the first conductor segment upward；This sleeve top is close to each other with this first conductor segment bottom, and this is years old
One conductor segment top is connected with this first conveyor screw bottom, and this first conveyor screw top is connected with this second conductor segment bottom, should
Second conductor segment top is connected with this second spirochetal top, and the second conveyor screw curls up with the second conductor segment down for axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610877003.2A CN106450694A (en) | 2016-09-30 | 2016-09-30 | Vehicle-mounted all-around dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610877003.2A CN106450694A (en) | 2016-09-30 | 2016-09-30 | Vehicle-mounted all-around dipole antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106450694A true CN106450694A (en) | 2017-02-22 |
Family
ID=58171624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610877003.2A Pending CN106450694A (en) | 2016-09-30 | 2016-09-30 | Vehicle-mounted all-around dipole antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106450694A (en) |
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| CN108134183A (en) * | 2017-12-15 | 2018-06-08 | 广州海格通信集团股份有限公司 | A kind of broadband sleeve antenna for portable terminal device |
| CN109273826A (en) * | 2018-12-11 | 2019-01-25 | 成都九华圆通科技发展有限公司 | A kind of vehicle-mounted ultrashort wave microwave omnidirectional monitoring aerial |
| CN113131201A (en) * | 2021-04-21 | 2021-07-16 | 广东工业大学 | Self-offset type omnidirectional circularly polarized helical antenna |
| CN114421119A (en) * | 2022-02-25 | 2022-04-29 | 深圳市美科星通信技术有限公司 | Antenna, wireless communication device and working method thereof |
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| CN108134183A (en) * | 2017-12-15 | 2018-06-08 | 广州海格通信集团股份有限公司 | A kind of broadband sleeve antenna for portable terminal device |
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| CN113131201A (en) * | 2021-04-21 | 2021-07-16 | 广东工业大学 | Self-offset type omnidirectional circularly polarized helical antenna |
| CN113131201B (en) * | 2021-04-21 | 2023-03-10 | 广东工业大学 | Self-offset type omnidirectional circularly polarized helical antenna |
| CN114421119A (en) * | 2022-02-25 | 2022-04-29 | 深圳市美科星通信技术有限公司 | Antenna, wireless communication device and working method thereof |
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