CN209487704U - Wide band high-gain Dual polarization Yagi-Uda antenna - Google Patents
Wide band high-gain Dual polarization Yagi-Uda antenna Download PDFInfo
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- CN209487704U CN209487704U CN201920340642.4U CN201920340642U CN209487704U CN 209487704 U CN209487704 U CN 209487704U CN 201920340642 U CN201920340642 U CN 201920340642U CN 209487704 U CN209487704 U CN 209487704U
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Abstract
Wide band high-gain Dual polarization Yagi-Uda antenna, equipped with antenna house, antenna axial direction bar, reflecting plate, dual polarization reflector, dual polarization folded dipole exciting unit and dual polarization director are equipped in antenna house, reflecting plate, dual polarization reflector, dual polarization folded dipole exciting unit and dual polarization director are sequentially arranged on antenna axial direction bar；The position of dual polarization director installation is front end, and the position of reflecting plate installation is rear end；Dual polarization director includes two orthogonal settings and in director in tandem；Dual polarization reflector includes two orthogonal settings and in reflector in tandem, dual polarization folded dipole exciting unit by two be mutually perpendicular to not in contact with folded dipole exciting unit form, two folded dipole exciting units are identical, are made of folded dipole feed, micro-strip function scoreboard and two microstrip patch；The antenna has many advantages, such as wide bandwidth, high-gain, narrow beam, high front and back than, dual polarization, high isolation, high efficiency, low cost and easy to produce.
Description
Technical field
The utility model relates to mobile communication Directional antenna devices and technologies, particularly relate to wide band high-gain dual polarization eight
The wooden antenna.
Background technique
Space field-yagi aerial (Yagi-Uda Antennas) is the new Taro in Japanese scholars space field and Yagi spark gap show inferior to 1926
Year common utility model.It is a kind of endfire array antenna being evolved by dipole antenna.Due to directionality, wind
The advantages such as small, light-weight, easy processing, at low cost are hindered, have been widely used in radar in a nearly century, TV signal connects
The fields such as receipts, direction-finding station, point-to-point communication, air traffic control.Yagi aerial has been loaded into religion as a kind of classical wire antenna
Section's book.However, conventional yagi aerial, bandwidth usually only 10% ~ 15%, 12 ~ 13Bi of gain, and usually single polarization.Gain is promoted
It is only limited by increasing director quantity improvement, therefore usually by more group battle arrays to obtain more high-gain, however design difficulty, ruler
Very little, weight, wind load and cost will increase.In mobile communications, yagi aerial is used for data directional transmissions more or signal is fixed
To covering, such as fixed service, signal relaying, tunnel or tunnel covering.However, narrow bandwidth, gain are low, disadvantage of single polarization makes
It is not suitable for large capacity and overlength distance transmitting scene.Currently, mobile communication directional data return, frequently with superelevation gain (G=
35 ~ 45dBi), the small burnt diameter before and after ULTRA-LOW SIDE LOBES (- SLL<-20dB) and superelevation than (>70dB) compare parabola antenna.Due to side
Tropism is related to caliber size, and the bore of parabola antenna is very big (usual 30-80 wavelength) when low frequency, therefore is common in higher
Microwave, millimeter wave frequency band, such as C-band(4 ~ 8GHz) and with super band, such as E-band(75 ~ 110GHz).In addition, high frequency work
When making, in the case where relative bandwidth is constant, the absolute bandwidth of parabola antenna can easily reach several GHz, almost with optical fiber
Quite, then plus its dual polarization design, message capacity very significantly, therefore industry have " with parabola antenna substitute optical fiber " saying
Method.However, in lower microwave frequency band, as the advantage of GSM/LTE/5.8G frequency range, yagi aerial will highlight, or even become
Irreplaceable optimal antenna scheme.Under this requirement background, spread bandwidth improves gain, realizes dual polarization, for Yagi spark gap
It is very necessary for antenna, and be also practicable.
Bandwidth is broadened, U-shaped folded dipole pipe is generallyd use, fills in coaxial cable transforming section in pipe；Gain is improved then to need
Increase director quantity, and optimizes their diameter, length and spacing.In addition, increasing by one between feed oscillator and reflecting plate
Root conductor reflector, to improve front and back ratio, improve gain.As for dual polarization, technically realize then difficult very much.Dual polarization work
When, it needs two yagi aerial longitudinal direction co-axial alignments, it is lateral then mutually orthogonal, be staggered placement axially back and forth, the U-shaped feedback of the two
Then respective antarafacial is orthogonal with director for source capsule；Their director, reflector, feed oscillator will be respectively independent, and reflecting plate, branch
Strut then shares.Since the position of director, U-shaped feed pipe and reflector is different, the performance of two yagi aerials exists obvious poor
It is different, such as standing wave, bandwidth, gain, wave are wide, front and back ratio differs greatly, this can influence the whole using effect of antenna significantly.In order to
Solve the problems, such as this, a kind of Dual polarization Yagi-Uda antenna device of application number 201020568073.8 is disclosed two U-shaped feed pipes
Become U-shaped thin slice and coplanar orthogonally located, their feed arm in the same plane, and is all fed using double-fed point.Then, respectively
The microstrip power divider of personal one-to-two feeds double-fed point.This scheme the problem is that: feed circuit plate be arranged in feed
Immediately ahead of oscillator, the signal formation towards previous irradiation is blocked, matching and bandwidth are influenced, gain and directionality are influenced with clothing, and subtracted
Small route board size can be such that the wiring of two-way microstrip power divider is close to each other again, and two-port isolation is caused to be deteriorated.When frequency compared with
When low such as 1GHz or less, circuit board size is smaller relative to wavelength, and two U-shaped feed pipe physics spacing are farther out, can't be to property
Significant difference can be caused, so that isolation significantly improved, processed and assembly is easier.On the contrary, logical in 5G compared with Gao Shiru in frequency
The 3.5GHz frequency range of letter, for the consistency of performance for guaranteeing two Yagi spark gaps, two U-shaped feed pipe physics spacing need that very little is arranged, with
As for process and assemble difficulty, can not produce in batches.This fundamental contradiction is to cause to be difficult to realize dual polarization when yagi aerial high frequency
Basic reason.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of wide band high-gain Dual polarization Yagi-Uda antenna, the antenna
Have many advantages, such as wide bandwidth, high-gain, narrow beam, high front and back than, dual polarization, high isolation, high efficiency, low cost and easy to produce.
To realize the above-mentioned technical purpose, used technical solution is: wide band high-gain Dual polarization Yagi-Uda antenna, is equipped with day
Irdome is equipped with antenna axial direction bar, reflecting plate, dual polarization reflector, dual polarization folded dipole exciting unit and double in antenna house
Polarize director, and reflecting plate, dual polarization reflector, dual polarization folded dipole exciting unit and dual polarization director are sequentially arranged at
On antenna axial direction bar；The position of dual polarization director installation is front end, and the position of reflecting plate installation is rear end；
The dual polarization director includes two orthogonal settings and in director in tandem；The director of polarization
Antenna axial direction bar two sides are symmetricly set on by least one and are formed in conplane round metal bars, from antenna axial direction bar
The length of rear end to forward metal pole successively shorten or staged shortens；
The dual polarization reflector includes two orthogonal settings and in reflector in tandem, the reflector of polarization
Length be longer than the length of director and the length of dual polarization folded dipole exciting unit；The length of the reflector of polarization is small
In the length of reflecting plate；
The dual polarization folded dipole exciting unit by two be mutually perpendicular to not in contact with folded dipole exciting unit
Composition, two folded dipole exciting units are identical, by folded dipole feed, micro-strip function scoreboard and two microstrip patch
Composition；
The plane that folded dipole feed two-arm is constituted is vertical with director plane, and folded dipole feed is symmetrically covered in antenna
In axial stem, an arm of folded dipole feed is set against the side of antenna axial direction bar, another arm of folded dipole feed with
Antenna axial direction bar does not contact, and inclined two side position of an arm of the folded dipole feed abutted with antenna axial direction bar has a pair of be symmetrical arranged
Feeding gap, between another arm and antenna axial direction bar of the discontiguous folded dipole feed of antenna axial direction bar be equipped with micro-strip function
The width direction of scoreboard, micro-strip function scoreboard is consistent with the width direction of folded dipole feed, the ground level and day of micro-strip function scoreboard
Line axial stem is affixed, and the microstrip line face of micro-strip function scoreboard is not contacted with folded dipole feed, one end point of two microstrip patch
Do not connect with two feeding gaps, the other end of two microstrip patch respectively with two constant amplitude anti-phase outputs of micro-strip function scoreboard
End connection.
Antenna axial direction bar is square-tube-shaped or tubular.
The antenna further includes the feed cable connecting with the input terminal of micro-strip function scoreboard and connect with feed cable end
Coaxial fitting.
Coaxial fitting is sub-miniature A connector, N, BNC connector, any one in 4.3/10 connector or TNC connector, is coaxially connect
Head is fixed on reflecting plate or is not fixed and is arranged on the outside of reflecting plate.
Antenna axial direction bar is equipped with the groove for fixing micro-strip function scoreboard.
Folded dipole feed is patch conductor, with a thickness ofT 0 , both ends are semicircle segmental arc, centre is then straight conductor section, two
Arm is full symmetric, folded dipole feed straight lengthL 0 For (0.60 ~ 0.80) ×λ g , plane and director plane that two-arm is constituted
Vertically.
Micro-strip function scoreboard is long strip shape structure, is the equal power splitters of one-to-two, including an input terminal and two etc.
Width reversed-phase output, input terminal are arranged towards reflecting plate direction, and the feed line length difference of two reverse phase function branch paths is 0.45-0.55λ g ,λ g For guide wavelength.
Antenna house is top closed, bottom opening, shell structure in homogeneous thickness, and open end is fixed on reflecting plate, day
The shape of irdome is cylindrical, conical, prismatic or pyramid, and the Material Processing of antenna house is PVC, PC, PE, ABS, UABS
Or glass reinforced plastic.
The utility model beneficial effect is: 1) folded dipole feed by U-tube shape is become into sheet, and with director plane
Orthogonally located, an arm of folded dipole feed is close to antenna axial direction bar side, and the arm center two sides are symmetrical arranged a pair of of feed
Gap, to carry out two o'clock feed, and another arm is located at the outside of the antenna axial direction bar other side, does not contact with antenna axial direction bar；
2) it is fed using microstrip-fed plate, and the unconventional feeding classification filled in coaxial cable in U-tube；Microstrip-fed plate includes one
A microstrip power divider and two identical micro-strip pinboards, the centre of folded dipole feed and parallel with it is arranged in the former,
Ground level abuts antenna axial direction bar, the former is then connected by the latter with the duplex feeding of folded dipole feed point；3) it is polarized using two-way
Director, folded dipole feed, reflector, micro-strip function scoreboard and micro-strip pinboard, it is mutually independent and divide each other longitudinally
It opens；4) optimize director, the quantity of reflector, length and spacing, obtain highest-gain to make to polarise；5) optimize micro-strip
The design of function scoreboard and micro-strip pinboard, so that antenna standing wave is minimum, bandwidth is maximum, gain highest；6) optimize two equivalent vibrations
Fore-and-aft distance between sub- feed, ensure that polarization consistency of performance, good isolation while, there is antenna good
Productibility, realize what existing conventional scheme was difficult to realize: one, Dual polarization Yagi-Uda antenna can be used for 3.5G with super band,
And it is suitable for mass production；Two, the ultra wide bandwidth of good impedance matching, standing-wave ratio VSWR≤1.50(3.0 ~ 4.0GHz, BW >
28.57%) the 3.5G frequency range (3.3 ~ 3.8GHz) of 5G communication, is completely covered；Three, high-gain, narrow beam, H/V polarized gain point
Not Wei G=15.5 ~ 17.7dBi, 13.8 ~ 16.8dBi, E/H surface wave is wide are as follows: 21.2o~26.5o、20.0o~26.2°、21.3o~
26.25o、20.75o~25.25°；Four, high-isolation, | S21| it is better than -20dB；Five, high front and back is than FTBR, low sidelobe, and FTBR is big
It is lower than -9dB in 18dB, SLL；Six, high efficiency, polarization efficiency are all larger than 94%；Seven, the good uniformity between polarising, the two poles of the earth
The performance indexes of change is all fine, other indicator differences are smaller in addition to gain.In addition, antenna size is smaller, it is compact-sized,
DiameterDAnd lengthLIt is respectively as follows: 1.0λ L 、5.0⋅λ L (λ L For low-limit frequency wavelength), it is long and narrow to be suitable for tunnel, tunnel, mine hole etc.
The signal oriented cover in region or transmission.In addition, the utility model also has, thinking novelty, clear principle, method are pervasive, process
The features such as convenient, inexpensive, be the ideal design of wide band high-gain Dual polarization Yagi-Uda antenna, and for common monopole
The design and improvement of yagi aerial are also applicable and effective.
Detailed description of the invention
Fig. 1 is that rectangular coordinate system used by antenna model defines schematic diagram.
Fig. 2 is the front view of the folded dipole Dam failure mode of the utility model.
Fig. 3 is the left view of the folded dipole Dam failure mode of the utility model.
Fig. 4 is the front view of the folded dipole Dam failure mode of the utility model.
Fig. 5 is the front view of the microstrip power divider model of the utility model.
Fig. 6 is the side view of the microstrip patch model of the utility model.
Fig. 7 is the front view of the H polarization yagi aerial model without folded dipole exciting unit of the utility model.
Fig. 8 is the front view of the V polarization yagi aerial model without folded dipole exciting unit of the utility model.
Fig. 9 is the right view for the H polarization yagi aerial model that the utility model has folded dipole exciting unit.
Figure 10 is the partial elevation view near the folded dipole feed of H/V Dual polarization Yagi-Uda antenna model.
Figure 11 is the whole front view of H/V Dual polarization Yagi-Uda antenna model.
Figure 12 is the front view of H/V Dual polarization Yagi-Uda antenna complete model.
Figure 13 is the input impedance of H/V Dual polarization Yagi-Uda antennaZ in Characteristic.
Figure 14 is the port reflection coefficient of H/V Dual polarization Yagi-Uda antenna | S11|/|S22|。
Figure 15 is the standing-wave ratio VSWR curve of H/V Dual polarization Yagi-Uda antenna.
Figure 16 is the interport isolation of H/V Dual polarization Yagi-Uda antenna | S21|。
Figure 17 is the gain of H/V Dual polarization Yagi-Uda antennaG vs. fVariation characteristic.
Figure 18 is the wide HPBW vs. of the face E/H half-power wave of H/V Dual polarization Yagi-Uda antennafVariation characteristic.
Figure 19 is the front and back ratio FTBR vs. of H/V Dual polarization Yagi-Uda antennafVariation characteristic.
Figure 20 is the efficiency eta of H/V Dual polarization Yagi-Uda antennaA vs. fVariation characteristic.
Figure 21 is that the H polarization of H/V Dual polarization Yagi-Uda antenna existsf 1 =3.3GHz gain pattern.
Figure 22 is that the V polarization of H/V Dual polarization Yagi-Uda antenna existsf 1 =3.3GHz gain pattern.
Figure 23 is that the H polarization of H/V Dual polarization Yagi-Uda antenna existsf 2 =3.55GHz gain pattern.
Figure 24 is that the V polarization of H/V Dual polarization Yagi-Uda antenna existsf 2 =3.55GHz gain pattern.
Figure 25 is that the H polarization of H/V Dual polarization Yagi-Uda antenna existsf 3 =3.80GHz gain pattern.
Figure 26 is that the V polarization of H/V Dual polarization Yagi-Uda antenna existsf 3 =3.80GHz gain pattern.
This paper attached drawing is and to constitute part of specification for being further described and understand to the utility model,
Be used to explain the utility model together with specific embodiment of the utility model, but constitute limitations of the present invention or
It limits.
Specific embodiment
The preferred embodiment of utility model patent is provided, with reference to the accompanying drawing the technical side of the utility model is described in detail
Case.Here, respective drawings will be provided the utility model is described in detail.It should be strongly noted that as described herein
Example is preferably implemented to be only used for describing and explaining the present invention, is not limited to or limits this utility model.
Wide band high-gain Dual polarization Yagi-Uda antenna, for 3.5G with super band, H/V polarized gain be respectively G=13.76 ~
17.76dBi, 14.0 ~ 17.0dBi, E/H surface wave are wide are as follows: 21.2o~26.5o、20.0o~26.2°、21.3o~26.25o、20.75o~
25.25°；High cross polarization ratio XPD and isolation, XPD are greater than 21dB, and isolation is better than -20dB；Five, high front and back is low than FTBR
Secondary lobe SLL, FTBR are greater than 20dB, and SLL is lower than -10.5dB；Six, high efficiency, polarization efficiency are all larger than 90%, and antenna is equipped with day
Irdome is equipped with antenna axial direction bar, reflecting plate, dual polarization reflector, dual polarization folded dipole exciting unit and double in antenna house
Polarize director, and reflecting plate, dual polarization reflector, dual polarization folded dipole exciting unit and dual polarization director press axial direction
It is sequentially arranged on antenna axial direction bar, the position of dual polarization director installation is front end, and the position of reflecting plate installation is rear end.
Wide band high-gain Dual polarization Yagi-Uda antenna, common polarization mode is H/V dual polarization, ± 45 ° of dual polarizations, Huo Zheqi
Arbitrarily orthogonal dual-linear polarization, polarization share reflecting plate, antenna axial direction bar and antenna house for he, and antenna axial direction bar is metal support
Bar.Reflector, director, folded dipole exciting unit and feed cable are then completely independent, each pair of same components of polarization,
Such as reflector, director, it is separated and comes to guarantee good isolation.
Reflecting plate can be square plate, circular slab, regular polygon plate etc., the rear of reflector is mounted on, before improving
After compare.
Dual polarization reflector includes two orthogonal settings and in reflector in tandem, the length of the reflector of polarization
It is longer than the length of director and the length of dual polarization folded dipole exciting unit, that is, is longer than piece round metal of longest of director
The length of stick.The length of the reflector of polarization is less than the length (diameter, size) of reflecting plate.
Dual polarization director includes two orthogonal settings and in director in tandem；The director of polarization is by extremely
Few one is symmetricly set on antenna axial direction bar two sides and forms in conplane round metal bars, from the rear end of antenna axial direction bar
Length to forward metal pole successively shortens or staged shortens；The length of round metal bars, which successively shortens, to be referred to, from first
Round metal bars are to last root round metal bars, and the round metal bars of the front end latter piece round metal bars more adjacent than rear end are short, metal
The length staged of pole, which shortens, to be referred to from first round metal bars to last root round metal bars, several adjacent round metal bars
It is that round metal bars length in one group, every group is identical, round metal in the group more adjacent than rear end positioned at one group of round metal bars of front end
Stick wants short.
Dual polarization folded dipole exciting unit by two be mutually perpendicular to not in contact with folded dipole exciting unit form, two
A folded dipole exciting unit is identical, is made of folded dipole feed, micro-strip function scoreboard and two microstrip patch, folding
The plane for closing dipole feed two-arm composition is vertical with director plane, and folded dipole feed set symmetrical above and below is in antenna axial direction bar
On, an arm of folded dipole feed is set against the side of (being adjacent to) antenna axial direction bar, another arm of folded dipole feed with
Antenna axial direction bar does not contact and (is located on the outside of antenna axial direction bar), an arm inclined two for the folded dipole feed abutted with antenna axial direction bar
Side position has a pair of symmetrically arranged feeding gap, another arm and antenna with the discontiguous folded dipole feed of antenna axial direction bar
Micro-strip function scoreboard is equipped between axial stem, the width direction of micro-strip function scoreboard is consistent with the width direction of folded dipole feed, micro-
Ground level with function scoreboard is affixed with antenna axial direction bar, and the microstrip line face of micro-strip function scoreboard is not contacted with folded dipole feed, and two
One end of a microstrip patch is connect with two feeding gaps respectively, and the other end of two microstrip patch divides with micro-strip function respectively
Two constant amplitude reversed-phase outputs of plate connect.The connection of microstrip patch and micro-strip function scoreboard, folded dipole feed is using welding
Form.
Antenna axial direction bar is square-tube-shaped or tubular.Optimal selection square-tube-shaped antenna axial direction bar facilitate folded dipole feed with
The fitting of micro-strip function scoreboard, folded dipole exciting unit moves on antenna axial direction bar up and down in order to prevent, sets on antenna axial direction bar
The groove of micro-strip function scoreboard is set for card.
The antenna further includes the feed cable connecting with the input terminal of micro-strip function scoreboard and connect with feed cable end
Coaxial fitting.Coaxial fitting is sub-miniature A connector, N, BNC connector, any one in 4.3/10 connector or TNC connector, coaxially
Connector is fixed on reflecting plate or is not fixed and is arranged on the outside of reflecting plate, and the coaxial cable for being connected with coaxial fitting directly stretches out
It is no longer fixed on the outside of reflecting plate.
Folded dipole feed is patch conductor, with a thickness ofT 0 , both ends are semicircle segmental arc, centre is then straight conductor section, two
Arm is full symmetric, folded dipole feed straight lengthL 0 For (0.60 ~ 0.80) ×λ g , two-arm plane is vertical with director plane.Two
Arm plane is vertical with director plane；One arm of folded dipole feed abuts axial support rod side, which has a pair of symmetrical
Feeding gap, that is, duplex feeding point, another arm is then located at the outside of the antenna axial direction bar other side；Another polarized folded dipole
Feed, it is polarized identical with first, but 90 ° of transverse rotation and it is located at axial position rearward, with first equivalent vibration
Sub- feed is mutually perpendicular to but non-intersecting, the good isolation between being polarised with guarantee.
Micro-strip function scoreboard is long strip shape structure, is the equal power splitters of one-to-two, is made of transforming section and function segmentation, packet
An input terminal and two constant amplitude reversed-phase outputs are included, output end is located at a side position, utilizes folded dipole feed and antenna axis
Space between line bar, length and width direction and the length of folded dipole feed are consistent with width direction, do not influence matching and
Bandwidth, the transforming section where output end are arranged towards reflecting plate, and connect convenient for same coaxial cable does not influence similar convert into simultaneously
The installation of oscillator exciting unit, the feed line length difference of two function branch paths are 0.45-0.55λ g ,λ g For guide wavelength.Theoretically two
The feed line length difference of person is about 0.5 ×λ g (λ g For guide wavelength).If practical in view of media plate thickness, dielectric constant
For (0.30 ~ 0.45) ×λ g ；Micro-strip function scoreboard abuts antenna axial direction bar side, in the antenna axial direction bar table for being close to micro-strip function scoreboard
It is sunken inwardly at face, so that micro-strip function scoreboard is embedded, the ground level of micro-strip function scoreboard is tightly attached to antenna axial direction bar.It is micro-
One end of tape relay plate is connected with micro-strip function scoreboard, the other end then two side conductor phases with the double-fed of folded dipole feed point gap
Even.
Antenna house is top (front end) closing, bottom (rear end) opening, shell structure in homogeneous thickness, the opening of antenna house
End is fixed on reflecting plate, and the shape of antenna house is cylindrical, conical, prismatic or pyramid, the Material Processing of antenna house
For PVC, PC, PE, ABS, UABS or glass reinforced plastic.
Wide band high-gain Dual polarization Yagi-Uda antenna design method specifically includes the following steps:
Step 1: establishing rectangular coordinate system in space, Fig. 1 is seen.
The Yagi spark gap Step 2: construction H polarizes.At XOY plane (horizontal plane), a square column type or cylinder are placed along the x axis
Shape metallic rod 001.Then, row's circular hole is bored in metallic rod both side surface, from left to right successively by 20 round metal bars 010 ~ 029
It is put into circular hole, their length gradually shortens, the director as H polarization direction.Wherein, first that root pole of the pole left side
Length longest is reflector 002, and places one piece of rectangular or circular metal plate 003 in its rear, is used as reflecting plate, to improve
Front and back ratio.Finally, upper surface or lower surface recessing 101 in metallic rod 001, to be embedded in micro-strip function scoreboard.It is all to guide into
The round metal bars of device are all located at horizontal plane (XOY), therefore antenna is H polarization, as shown in Figure 7.
The Yagi spark gap Step 3: construction V polarizes.It is placed along the x axis according to the method for step 2 at XOZ plane (vertical plane)
A piece square column type or cylindrical metal bar 001.Then, row's circular hole is bored in metallic rod upper and lower surfaces, by 20 round metal bars
020 ~ 039 is sequentially placed into circular hole from left to right, their length gradually shortens, the director as V polarization direction.Wherein,
Piece that root pole length longest of the pole left side is reflector 004, and places one piece of rectangular or circular metal plate in its rear
003, it is used as reflecting plate, to improve front and back ratio.Finally, in the left or right side surface recessing 102 of metallic rod 001, so as to embedding
Enter micro-strip function scoreboard.All director dipoles are all located at vertical plane (XOZ), therefore antenna is V polarization, as shown in Figure 8.
Step 4: construction H/V dual polarization Yagi spark gap.By Step 2: three two Yagi spark gaps it is coaxial, be completely coincident placement, at this time
Two groups of directors of vertical/horizontal arrangement are mutually orthogonal.In order to process, it is easy to assembly, two groups of directors should be avoided intersection, therefore will
All V polarization director of step 3 is together toward one section of identical distance is moved left, as shown in figure 11.In addition, due to antenna axis
It can be shared to bar and reflecting plate, therefore any metallic rod and reflecting plate all the way of H/V polarization is removed, as shown in figure 11.
Step 5: design folded dipole feed.Respectively Step 2: the reflector and first of three H/V polarization Yagi spark gap draws
To between device, one folded dipole feed 200 of setting parallel with it, as shown in Fig. 2, Fig. 3, Fig. 4, Figure 10, folded dipole feed
Plane is vertical with director plane, and an arm 201 of folded dipole feed is among 001 side of antenna axial direction bar, the arm two sides
There is a pair of symmetrical feeding gap 202 i.e. duplex feeding point in position, and another arm 203 is then located at the outside of the antenna axial direction bar other side,
It is not contacted with antenna axial direction bar, folded dipole feed both ends are semicircle segmental arc 204, centre is then straightway, as shown in Figure 2.Folding
Close dipole feed with a thickness ofT 0 , length beL 0 , width W 0 , as shown in Figure 3.
Step 6: design micro-strip function scoreboard.As shown in Figure 9, Figure 10, in the sheet folded dipole feed 200 of step 5
Among two-arm, one piece of micro-strip function scoreboard 600 is set along oscillator arms direction, i.e. the length of micro-strip function scoreboard 600 is less than equivalent vibration
The length that sub- feed surrounds, micro-strip function scoreboard are made of transforming section 601 and function segmentation 602, and the starting point of transforming section 601 is input
End 603, it is two constant amplitude reversed-phase outputs 604,605 that function, which is segmented 602 ends, and input terminal 603 connects 50 Ω coaxial cables, medium
It is provided with via hole 606 on plate 600 and its ground level 607, via hole 606 expands as aperture 608 on ground level 607, such as Fig. 5 institute
Show；
Micro-strip pinboard is arranged in step 7.In two output of micro-strip function scoreboard of step 6, each one piece of micro-strip of setting turns
Fishplate bar 700, the signal wire 701 of micro-strip pinboard and ground level 702, by 600 liang of output ends of micro-strip function scoreboard 604,605 respectively with
Two feeding points of sheet folded dipole feed 200 connect,
Step 8, additional antenna cover.A cylindrical antenna cover 800 is added outside the antenna of step 1 to seven designs,
Antenna is covered completely, antenna house bottom end 801 opening, top 802 then close, play waterproof, it is moisture-proof, dust-proof the effects of, thus
Protect each component of inner antenna.The input terminal of two micro-strip function scoreboards is separately connected feed cable 900, the end of feed cable 900
End is coaxial fitting 901, and coaxial fitting 901 is fixed on the outer surface of reflecting plate 003, and final antenna obtained is as shown in figure 12.
Figure 13 is the input impedance of H/V Dual polarization Yagi-Uda antennaZ in Characteristic.Wherein, horizontal axis (X-axis) is frequencyf, unit is
GHz；The longitudinal axis (Y-axis) is impedanceZ in , unit Ω;Solid line indicates H polarization, and dotted line indicates V polarization；Fair line indicates real partR in , line of adding some points expression imaginary partX in .Known by figure, in 3.2 ~ 3.9GHz frequency range, H/V polarize real imaginary part variation range be respectively as follows :+
33.5 ~+67.5 Ω, -15.5 ~+15.5 Ω and+40 ~+86 Ω, -25 ~+19 Ω have good broadband impedance characteristic.
Figure 14 is the port reflection coefficient of H/V Dual polarization Yagi-Uda antenna | S11|/|S22|.Wherein, horizontal axis (X-axis) is frequencyf, unit GHz；The longitudinal axis (Y-axis) is reflection coefficient | S11|/|S22|, unit is dB.Known by figure, in 3.2 ~ 3.9GHz frequency range (BW
=700MHz, 19.72%), the polarized port reflection coefficient of H/V is respectively | S11|<-12dB、|S22|<-11.5dB。
Figure 15 is the standing-wave ratio VSWR curve of H/V Dual polarization Yagi-Uda antenna.Wherein, horizontal axis (X-axis) is frequencyf, unit is
GHz；The longitudinal axis (Y-axis) is VSWR；Solid line indicates H polarization, and dotted line indicates V polarization.Known by figure, cross oscillator unit 3.2 ~
3.9GHz frequency range (BW=700MHz, 19.72%), realizes good impedance matching, and standing-wave ratio VSWR≤1.75(3.3 ~
3.8GHz, VSWR≤1.5), most down to 1.08, relative bandwidth 19.72%.
Figure 16 is the interport isolation of H/V Dual polarization Yagi-Uda antenna | S21|.Wherein, horizontal axis (X-axis) is frequencyf, unit is
GHz；The longitudinal axis (Y-axis) is the polarized interport isolation of H/V | S21|, unit is dB.Known by figure, 3.2 ~ 3.9GHz frequency range (BW=
700MHz, 19.72%), the isolation of H/V polarization port | S21| < -17.5dB(3.3 ~ 3.8GHz, | S21| < -20dB), compare
It is ideal.
Figure 17 is the gain of H/V Dual polarization Yagi-Uda antennaG vs. fVariation characteristic.Wherein, horizontal axis (X-axis) is frequencyf, single
Position is GHz；The longitudinal axis (Y-axis) is gain, unit dBi；Solid line indicates H polarization, and dotted line indicates V polarization.Known by figure, 3.2 ~
3.9GHz frequency range (BW=700MHz, 19.72%), the polarized gain of H/V be respectively G=15.5 ~ 17.7dBi, G=13.8 ~
16.8dBi, the high-frequency gain maximum of polarization have about 3.5dBi or so difference, and then difference is little for low-frequency range, absolutely proves bipolar
The consistency of performance for changing Yagi spark gap is very difficult design object.
Figure 18 is the wide HPBW vs. of the face E/H half-power wave of H/V Dual polarization Yagi-Uda antennafVariation characteristic.Wherein, horizontal axis
(X-axis) is frequencyf, unit GHz；The longitudinal axis (Y-axis) is that half-power wave is wide, unit deg；Solid line indicates H polarization, and dotted line indicates
V polarization；Fair line indicates the face E, and line of adding some points indicates the face H.Known by figure, at 3.2 ~ 3.9GHz frequency range (BW=700MHz, 19.72%),
The wide polarized E/H surface wave of H/V is respectively 21.2o~26.5o/20.0o~26.2°、21.3o~26.25o/20.75o~ 25.25 °, the two poles of the earth
Wide maximum 0.8 ° of the difference of (face the E) wave changed, illustrates that their the wide consistency of wave is fine.
Figure 19 is the front and back ratio FTBR vs. of H/V Dual polarization Yagi-Uda antennafVariation characteristic.Wherein, horizontal axis (X-axis) is frequency
Ratef, unit GHz；The longitudinal axis (Y-axis) is gain, unit dB；Solid line indicates H polarization, and dotted line indicates V polarization.Known by figure,
3.2 ~ 3.9GHz frequency range (BW=700MHz, 19.72%), the polarized front and back ratio FTBR of H/V are respectively 18 ~ 32dB, 19dB ~ 37dB,
The front and back of polarization is more little than difference, illustrates that their consistency is fine.
Figure 20 is the efficiency eta of H/V Dual polarization Yagi-Uda antennaA vs. fVariation characteristic.Wherein, horizontal axis (X-axis) is frequencyf,
Unit is GHz；The longitudinal axis (Y-axis) is gain, unit dB；Solid line indicates H polarization, and dotted line indicates V polarization.Known by figure, 3.2 ~
3.9GHz frequency range (BW=700MHz, 19.72%), the polarized η of H/VAIt is all larger than 94%, illustrates that their efficiency is very high, consistency
Also very well.
Figure 21 is that the H polarization of H/V Dual polarization Yagi-Uda antenna existsf 1 =3.3GHz gain pattern.Wherein, solid line is the face E
(XOY plane), dotted line are the face H (XOZ plane), and two surface wave beams are relatively narrow and are almost overlapped, sidelobe level SLL higher (about-
10dB), front and back is compared greater than 27.5dB.
Figure 22 is that the V polarization of H/V Dual polarization Yagi-Uda antenna existsf 1 =3.3GHz gain pattern.Wherein, solid line is the face E
(XOZ plane), dotted line are the face H (XOY plane), and two surface wave beams are relatively narrow and are almost overlapped, sidelobe level SLL higher (about-
10dB), front and back is compared greater than 32dB.
Figure 23 is that the H polarization of H/V Dual polarization Yagi-Uda antenna existsf 2 =3.55GHz gain pattern.Wherein, solid line is the face E
(XOY plane), dotted line be the face H (XOZ plane), two surface wave beams are relatively narrow and are almost overlapped, sidelobe level SLL it is lower (about-
13dB), front and back is compared greater than 27dB.
Figure 24 is that the V polarization of H/V Dual polarization Yagi-Uda antenna existsf 2 =3.55GHz gain pattern.Wherein, solid line is the face E
(XOZ plane), dotted line be the face H (XOY plane), two surface wave beams are relatively narrow and are almost overlapped, sidelobe level SLL it is lower (about-
12.5dB), front and back is compared greater than 28dB.
Figure 25 is that the H polarization of H/V Dual polarization Yagi-Uda antenna existsf 3 =3.80GHz gain pattern.Wherein, solid line is the face E
(XOY plane), dotted line are the face H (XOZ plane), and two surface wave beams are relatively narrow and are almost overlapped, sidelobe level SLL higher (about-
10dB), front and back is compared greater than 25dB.
Figure 26 is that the V polarization of H/V Dual polarization Yagi-Uda antenna existsf 3 =3.80GHz gain pattern.Wherein, solid line is the face E
(XOZ plane), dotted line are the face H (XOY plane), and two surface wave beams are relatively narrow and are almost overlapped, the face E sidelobe level SLL higher (about-
9dB), front and back is compared greater than 24dB.
Claims (8)
1. wide band high-gain Dual polarization Yagi-Uda antenna, it is characterised in that: be equipped with antenna house, antenna axial direction is equipped in antenna house
Bar, reflecting plate, dual polarization reflector, dual polarization folded dipole exciting unit and dual polarization director, reflecting plate, dual polarization reflection
Device, dual polarization folded dipole exciting unit and dual polarization director are sequentially arranged on antenna axial direction bar；Dual polarization director peace
The position of dress is front end, and the position of reflecting plate installation is rear end；
The dual polarization director includes two orthogonal settings and in director in tandem；The director of polarization by
At least one is symmetricly set on antenna axial direction bar two sides and forms in conplane round metal bars, after antenna axial direction bar
The length of end to forward metal pole successively shortens or staged shortens；
The dual polarization reflector includes two orthogonal settings and in reflector in tandem, the length of the reflector of polarization
Degree is longer than the length of director and the length of dual polarization folded dipole exciting unit, and the length of the reflector of polarization is less than anti-
Penetrate the length of plate；
The dual polarization folded dipole exciting unit by two be mutually perpendicular to not in contact with folded dipole exciting unit form,
Two folded dipole exciting units are identical, are made of folded dipole feed, micro-strip function scoreboard and two microstrip patch；
The plane that folded dipole feed two-arm is constituted is vertical with director plane, and folded dipole feed is symmetrically covered in antenna axial direction
On bar, an arm of folded dipole feed is set against the side of antenna axial direction bar, another arm and antenna of folded dipole feed
Axial stem does not contact, and the position of the inclined two sides of an arm of the folded dipole feed abutted with antenna axial direction bar has a pair symmetrically arranged
Micro-strip function point is equipped between feeding gap, and another arm and antenna axial direction bar of the discontiguous folded dipole feed of antenna axial direction bar
The width direction of plate, micro-strip function scoreboard is consistent with the width direction of folded dipole feed, the ground level and antenna of micro-strip function scoreboard
Axial stem is affixed, and the microstrip line face of micro-strip function scoreboard is not contacted with folded dipole feed, one end difference of two microstrip patch
Connect with two feeding gaps, the other end of two microstrip patch respectively with two constant amplitude reversed-phase outputs of micro-strip function scoreboard
Connection.
2. wide band high-gain Dual polarization Yagi-Uda antenna as described in claim 1, it is characterised in that: the antenna axial direction bar is
Square-tube-shaped or tubular.
3. wide band high-gain Dual polarization Yagi-Uda antenna as described in claim 1, it is characterised in that: the antenna further includes and micro-strip
The feed cable of the input terminal connection of function scoreboard and the coaxial fitting being connect with feed cable end.
4. wide band high-gain Dual polarization Yagi-Uda antenna as claimed in claim 3, it is characterised in that: the coaxial fitting is
Any one in sub-miniature A connector, N, BNC connector, 4.3/10 connector or TNC connector, coaxial fitting be fixed on reflecting plate or
It is not fixed and is arranged on the outside of reflecting plate.
5. wide band high-gain Dual polarization Yagi-Uda antenna as described in claim 1, it is characterised in that: on the antenna axial direction bar
Equipped with the groove for fixing micro-strip function scoreboard.
6. wide band high-gain Dual polarization Yagi-Uda antenna as described in claim 1, it is characterised in that: the folded dipole feed
For patch conductor, with a thickness ofT 0 , both ends are semicircle segmental arc, centre is then straight conductor section, and two-arm is full symmetric, folded dipole feedback
Source straight lengthL 0 For (0.60 ~ 0.80) ×λ g , two-arm constitute plane it is vertical with director plane.
7. wide band high-gain Dual polarization Yagi-Uda antenna as described in claim 1, it is characterised in that: the micro-strip function scoreboard is
Long strip shape structure is the equal power splitters of one-to-two, including an input terminal and two constant amplitude reversed-phase outputs, input terminal court
It is arranged to reflecting plate direction, the feed line length difference of two reverse phase function branch paths is 0.45-0.55λ g ,λ g For guide wavelength.
8. wide band high-gain Dual polarization Yagi-Uda antenna as described in claim 1, it is characterised in that: the antenna house is top
Closing, bottom opening, shell structure in homogeneous thickness, open end are fixed on reflecting plate, and the shape of antenna house is cylindrical, circle
Taper, prismatic or pyramid, the Material Processing of antenna house are PVC, PC, PE, ABS, UABS or glass reinforced plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920340642.4U CN209487704U (en) | 2019-03-18 | 2019-03-18 | Wide band high-gain Dual polarization Yagi-Uda antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920340642.4U CN209487704U (en) | 2019-03-18 | 2019-03-18 | Wide band high-gain Dual polarization Yagi-Uda antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209487704U true CN209487704U (en) | 2019-10-11 |
Family
ID=68134428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920340642.4U Withdrawn - After Issue CN209487704U (en) | 2019-03-18 | 2019-03-18 | Wide band high-gain Dual polarization Yagi-Uda antenna |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768378A (en) * | 2019-03-18 | 2019-05-17 | 广东通宇通讯股份有限公司 | Wide band high-gain Dual polarization Yagi-Uda antenna |
| CN113258254A (en) * | 2020-02-07 | 2021-08-13 | 深圳市威富通讯技术有限公司 | Multichannel WIFI signal transceiver |
-
2019
- 2019-03-18 CN CN201920340642.4U patent/CN209487704U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768378A (en) * | 2019-03-18 | 2019-05-17 | 广东通宇通讯股份有限公司 | Wide band high-gain Dual polarization Yagi-Uda antenna |
| CN109768378B (en) * | 2019-03-18 | 2024-01-05 | 广东通宇通讯股份有限公司 | Broadband high-gain dual-polarized yagi antenna |
| CN113258254A (en) * | 2020-02-07 | 2021-08-13 | 深圳市威富通讯技术有限公司 | Multichannel WIFI signal transceiver |
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