CN101080848B - Directed dipole antenna - Google Patents
Directed dipole antenna Download PDFInfo
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- CN101080848B CN101080848B CN2005800116350A CN200580011635A CN101080848B CN 101080848 B CN101080848 B CN 101080848B CN 2005800116350 A CN2005800116350 A CN 2005800116350A CN 200580011635 A CN200580011635 A CN 200580011635A CN 101080848 B CN101080848 B CN 101080848B
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Abstract
A dual polarized variable beam tilt antenna having a superior Sector Power Ratio (SPR). The antenna may have slant 45 dipole radiating elements including directors, and may be disposed on a plurality of tilted element trays to orient an antenna boresight downtilt. The directors may be disposed above or about the respective dipole radiating elements. The antenna has a beam front-to-side ratio exceeding 20 dB, a horizontal beam front-to-back ratio exceeding 40 dB, a high-roll off, and is operable over an expanded frequency range.
Description
Priority claim
The application requires to enjoy the U.S. Provisional Application 60/577 of " Antenna " by name that submitted on June 4th, 2004; 138 priority; And the application is the U.S. Patent application of submitting on December 16th, 2,004 10/737 that is called " Wideband Dual Polarized Base Station Antenna OfferingOptimized Horizontal Beam Radiation Patterns And VariableVertical Beam Tilt "; 214 partial continuous application (CIP), wherein this U.S. Patent application requires to enjoy the priority of the U.S. Provisional Patent Application of submitting on July 3rd, 2,003 60/484,688 that is called " Balun Antenna With Beam Director "; In addition; The application still is the U.S. Patent application of submitting on November 7th, 2,003 10/703 that is called " AntennaElement, Feed Probe, Dielectric Spacer; Antenna and Method ofCommunicating with a Plurality of Devices "; 331 partial continuous application, this U.S. Patent application then require to enjoy the priority of the U.S. Provisional Patent Application of submitting on June 26th, 2,003 60/482,689 that is called " Antenna Element, Multiband Antenna; and Methodof Communicating with a Plurality of Devices ".
Technical field
The present invention relates to field of antenna, relate in particular to antenna with the dipole radiation unit that in wireless communication system, uses.
Background technology
Along with the expansion of network traffic growth of requirement, service coverage area and the deployment of new system, mobile radio networks also obtains deployment and perfect constantly.For serving certain sector separately or being called as a plurality of antenna systems in certain zone of sub-district,, can cover bigger coverage, and the cellular-type communications system gains the name thus also through implementing these antenna system.These sub-district collectives have constituted the whole coverage that is used for specific wireless communication network.
What service is provided for each sub-district is antenna array and the associated switch that the sub-district is inserted whole communication network.In general, antenna array is divided into the sector, wherein each antenna service respective sectors.For example, three antennas of antenna system can provide service for three sectors, and the coverage of each antenna is about 120 °.These antenna is perpendicular polarization normally, and has having a down dip to a certain degree, makes the directional diagram cell phone that uses of directed towards user slightly downwards of antenna.The normally function of landform and other geographical feature that has a down dip of this hope.Yet before actual installation and test, the optimum value that has a down dip is always not foreseeable.Therefore, when the actual installation antenna, always need customize having a down dip of each antenna is set.Usually, big capacity cellular system possibly optimized in 24 hours cycle again.In addition, the user hopes that antenna can have the highest gain and very little intermodulation (IM) under the situation of having specified size.Therefore, the user can stipulate that which antenna is best for given network implementation mode.
Summary of the invention
Another object of the present invention is, a kind of dual polarized antenna is provided, and this antenna has the directivity of improvement and the sector isolation of improvement is provided, with the sector power ratio (SPR, Sector Power Ratio) that realizes increasing.
An object of the present invention is, a kind of double polarized antenna with optimal level surface radiation directional diagram is provided.Target provide a kind of horizontal beam front side with 20dB at least than, at least before and after the horizontal beam of 40dB than and the antenna pattern of improved roll-off characteristic.
Another object of the present invention provides the optimum antenna array of a kind of cross-polarization performance, and its same polarization and ratio minimum of cross polarization in the horizontal sector of 120 degree is 10dB.
Another object of the present invention provides a kind of antenna array with horizontal directivity pattern beamwidth of 50 °～75 °.
Another object of the present invention provides the minimum antenna array of a kind of intermodulation.
Another object of the present invention provides a kind of double polarized antenna that can on extended frequency band, work.
Another object of the present invention provides a kind of double polarized antenna that can produce adjustable vertical plane radiation patterns.
Another object of the present invention provides the antenna that a kind of interport isolation with enhancing is at least 30dB.
Another object of the present invention provides a kind of antenna of cheapness.
These and other target of the present invention by a kind of be used to transmit and receive have+45 ° realize with-45 ° of electromagnetic improvement antenna arrays of linearly polarized.
Description of drawings
Fig. 1 is the perspective view according to the dual polarized antenna of first preferred embodiment of the invention;
Fig. 2 has removed the broadband perspective view of multistage ground plane configuration of 45 crossed dipoles radiation elements that tilts, and the pallet profile of RF absorber that is used for describing inclination and the RF choke of ground plane;
Fig. 3 is the perspective view of N cross-shaped directors in dipole radiation unit, supporting;
Fig. 4 is the rearview of an element tray, has described the design of the micro belt shifting phase that is used for every pair of crossed dipoles radiation element of feed;
Fig. 5 is a rearview of describing the dual polarized antenna of cable-fed network, one of each other dual polarized antenna of micro belt shifting phase feed;
Fig. 6 is the perspective view that comprises the dual polarized antenna of RF absorber, and wherein the RF absorber is used for the radiation from phase shifter microstrip line dissipation RF, and prevents RF electric current cross-couplings;
Fig. 7 describes the figure that compares with typical cross dipole antenna antenna pattern with the high roll-off radiation pattern of the present invention's realization;
Fig. 8 A and 8B are the figure that describes the beam pattern in three sector site of using the dressing plate antenna;
Fig. 9 A and 9B describe the figure that uses according to the beam pattern in three sector site of antenna of the present invention;
Figure 10 is the perspective view that has comprised the another embodiment of the present invention of double frequency-band radiation element;
Figure 11 be in one of radiation element deploy the perspective view embodiment illustrated in fig. 10 of verge ring;
Figure 12 is a perspective view of on each radiation element, all having disposed the embodiment of the invention of verge ring;
Figure 13 is the view of various appropriate configurations of directors;
Figure 14 is the close-up illustration of double frequency band aerial; And
Figure 15 has described the array of double frequency-band and single band dipole radiation unit.
Embodiment
With reference now to Fig. 1,, wherein generality has shown the wideband dual polarized base station antenna 10 with optimal level surface radiation directional diagram and variable vertical beam inclination.Can find out that antenna 10 comprises a plurality of element tray 12,45 crossed dipoless (X dipole) radiation element 14 that tilts in the broadband that dipole is arranged in to 16 arranged in the element tray deploy.Each element tray 12 is all with the form oblique arrangement of " dominoes that pushes over ", and supported by a pair of tray supports 20.As depicted in figs. 1 and 2, integrated element tray 12 is fixed on the outer trays 22 with tray supports 20, makes between the sidewall of tray supports 20 and pallet 22, laterally to form the gap.As shown in, each tray unit 12 all has the upper surface of definition respective dipole to 16 ground plane, and have above that at interval and the feed dipole to the respective air medium microstrip line 30 of each dipole radiation unit 14 of 16.Between the sidewall of pallet 22 arc 26 of fixing a plurality of conductions, with rigidity that antenna 10 is provided and improve the isolation between the dipole radiation unit 14.
As shown in, above each tray unit 12, extend a pair of cable supporter 32.Supporter 32 support from cable 76 to air dielectric microstrip line 30 and to its printed circuit board (PCB) 50 that adheres to down the corresponding low IM RF stube cable 34 of formed microstrip feed network, will come this is discussed in more detail with reference to figure 4 after a while.
With reference now to Fig. 2,, wherein shown the perspective view of the element tray 12 of arranging with " dominoes that pushes over " form with the mode of the sidewall of tray supports of partly cut-away 20 and pallet 22.Each tray unit 12 all is to arrange with the form of this " dominoes that pushes over "; So that with the predetermined directional diagram optical axis (boresight) that has a down dip oriented phase to answer dipole radiation unit 14; For instance, this predetermined having a down dip can be the mid point of array adjustable slant range.In this example, about 4 ° of the expection maxima of waves beam deflection degree of antenna 10 and the mechanical optical axis have a down dip and depart from consistently, rather than about 8 ° mechanical optical axis departs under the situation that does not have inclined element pallet 12.According to the present invention, the maximum horizontal beam degree of skewness is compared with conventional method and is reduced to about 5 °, considers the wide bandwidth of operation and the slant range of antenna, and this value is an acceptable very.
Still with reference to figure 2, as shown in, tray supports 20 is separated an elongate gap with the adjacent wall of respective trays 22, defines RF choke 36 betwixt.This choke 36 that is formed by physical geometry has advantageously reduced the RF electric current that flows on the back side of pallet 22 externally.Faradic reduction has directly reduced backward radiation on outer trays 22 back sides.The critical design criterion that makes before and after the radiation than reaches maximum related this RF choke 36 comprise outer trays 22 on roll over the RF choke 36 between the sidewall rim 38 of height and tray supports and pallet 22 of height, tray supports 20 of sidewall 38.Preferably, RF choke 36 is λ/4 of radiation element 14 centre frequencies, and in addition, because the internal reflection in the air dielectric is eliminated, RF choke 356 has the narrow bandwidth with frequency dependence, and the choke bandwidth is about 22% of centre frequency.
According to an alternative embodiment of the invention, in RF choke 36, add a RF absorber 39, so that the frequency dependence of RF choke reduces, create the bigger RF choke of bandwidth thus.Preferably, said RF absorber 39 comprises the very high carbon of degree, slows down and any RF reflected wave that dissipates, and avoids influencing the main beam radiation that cross dipole antenna 12 is produced.As shown in, 45 cross dipole antenna 14 that tilt produce+the cross polarization main beam radiation of/-45 degree directions, each wave beam all has vertical component and horizontal component.When these components when 360 degree have all even equal amplitude on the directions, cross polarization is very good.For the plate aerial 10 with linearly aligned crossed dipoles 14 shown in Figure 1, the horizontal component of each beam direction is roll-offed sooner than vertical component.This means that the vertical beam width of each beam direction will be wider than horizontal beam width, and the vertical component of propagating along the edge of respective trays 12 will be more than horizontal component.Because the surface area of thin metal tray 12 is limited, the surface current on it is less with the possibility of horizontal component reflected back main beam radiation.On the contrary, along the edge of respective trays 12, stairstepping baffle plate 35 must comprise a lot of vertical component vector currents.Very advantageously be that through RF absorber 39 is added in the RF choke 36, the vertical component of each beam direction is by the main beam radiation of minimum degree ground reflected back crossed dipoles 14.So, cremasteric reflex device not after crossed dipoles 14.
Preferably, element tray 12 is processed by brass alloys, and in order to weld it is carried out zinc-plated polishing.As shown in, the main effect of element tray is to support radiation element 14 at specific direction.This direction is the vertical and horizontal beam directional diagram that two ports of antenna 10 provide optimal balance.In addition, this direction also provides the improvement between each port to isolate.In addition, element tray 12 provides RF earth point at coaxial cable/air band interface.
Preferably, this tray supports is processed by aluminium alloy.The main effect of tray supports is on specific direction, to support five element tray 12, so that the wave beam deflection of horizontal directivity pattern is minimum.
Compare with element tray 12, outer trays 22 is preferably processed by thicker aluminum alloy materials, and said outer trays employing Alodine (Alodine) coating processing, so that prevent the corrosion that external environment condition produces.The major function of outer trays 22 is to support the local array assembly.Its miscellaneous function is that the radiation through will be backward reduces to minimum and the RF power of radiation is focused on the forward sector towards antenna 10, thereby as explaining, maximizes the front and back ratio of antenna pattern.
With reference now to Fig. 3,, as shown in, the parasitic broadband cross dipole director 40 of on radiation element 14, having disposed N horizontal expansion has been described, and through air band feeding network 30 feeds.N is 1,2,3,4 ..., show in the present embodiment that wherein N equals 4.Preferably, the upper lateral extended element of parasitic broadband cross dipole director 40 is by each other evenly at interval, handles wherein as to broadened bandwidth to be shown that upper component preferably has short length.The spacing of the lower member of director 40 and radiation element 14 is more tight; So that the RF energy appropriately is coupled to director with a kind of mode that in the impedance matching of remaining valid, provides directional diagram to strengthen; Making that director 40 is actual does not realize gain, and this is different with yagi-uda (Yagi-Uda) antenna that has reflector and create the spacer element that gains separately.Advantageously, not to realize gain, but in the similar 3dB beamwidth of maintenance, outside the 3dB of antenna pattern beamwidth, realized improved directional diagram roll-off characteristic.Preferably, the about .033 λ in upper elements of directors 40 spaces (centre frequency), and between bottom director element and the radiation element 14 by parasitic structure 42 about .025 λ (λ is the wavelength of the centre frequency of radiation element 14 designs) at interval.
With reference now to Fig. 4,, what this figure showed is a low-loss printed circuit board (PCB) 50, its deploy a usefulness 52 summarize the microstrip capacitive phase shifter system that shows.This low-loss PCB50 is fixed on the back side of respective element tray 12.Microstrip capacitive phase shifter system 52 is merged into its feed through respective cable 34 and a pair of relative corresponding radiation element 14 couplings.
As shown in Figure 4, each microstrip phase shifter system 52 all comprises a phase shifter cursor slide 56, and in its down fixing dielectric member 54, this cursor slide can center on the adjustment of pivoting point 58 arcs through corresponding carriage release lever 60.Carriage release lever 60 can vertically be adjusted with a far-end crank (not shown), so that selectively phase shifter 54 and respective media member 56 are positioned on a pair of arc feeder line part 62 and 64, thus the phase velocity that adjustment is therefrom conducted.Through a pair of non-conductive insulator 66 carriage release lever 60 being fixed to PCB50 goes up but leaves the space above that.The loss coaxial cables 34 usefulness transmission medium of deciding is used to provide being electrically connected between phase shifter system 52 and the radiation element 14.Phase place and amplitude distribution through on the radiation element 14 of accurate control antenna 10 are optimized gain performance.And the highly stable phase shifter design that shows among Fig. 4 has realized this control.
With reference now to Fig. 5,, what this figure showed is the back side of antenna 10, has described cable-fed network, and each microstrip phase shifter system 52 all is one of other poliarizing antenna 14 feed.Input 72 is called as port I, and it is to be used for the input that-45 polarization are tilted, and is called as port II and import 74, and it is to be used for+input that 45 polarization are tilted.As shown in Figure 4, cable 76 is the feed lines that are coupled with a respective phase shifter system 52.Represent that by the output of this phase shifter system 52 of output 1～5 expression dipole by the corresponding output feed of phase shifter system 52 is to 16.
With reference now to Fig. 6; The figure illustrates further comprise be positioned at below each element tray 12, the antenna 10 of the RF absorber 78 after the antenna 10; The reverse RF radiation that is used to dissipate of this RF absorber from the phase shifter microstrip line, and prevent that the RF electric current is coupled between phase shifter system 52.
With reference now to Fig. 7; This figure mark 68 shown synoptically realized according to antenna 10 of the present invention have height roll-off with high before and after the antenna pattern of ratio, 65 ° of plate aerials of the standard with dipole radiation directional diagram that this directional diagram and 69 shows form and contrast.This high roll-off radiation pattern 68 is the significant improvement on typical dipole direction Figure 69.On the point of 3dB, horizontal beam width still remains on about 65 degree.
In addition, the design with radiation element 14 of director 40 is providing very big improvement aspect the horizontal beam radiation pattern of antenna, and the front side that wherein in Fig. 7, shows ratio is 23dB.As shown in Figure 7, traditional crossed dipoles radiation element produces the front side than the horizontal beam radiation pattern that is about 17dB.According to the present invention, the broadband parasitic directors 40 that is integrated on the radiation element 14 advantageously reaches 10dB with the antenna front side than improving, and in the instance of Fig. 7, has shown the 6dB increment.This improved front side also is called as " height roll-offs " design than effect.In this embodiment; Radiation element 14 and cross dipole directed 40 have advantageously kept the horizontal beam width of about 65 degree on the 3dB of antenna point, much more more this be different with having more directors to obtain the traditional Yagi-Uda antenna that to gain and reduce horizontal beam width thus.
Still, show the outstanding front and back ratio of antenna 10 with reference to figure 7.As shown in, plate aerial 10 has the backside lobe that fully reduces, and has realized the front and back ratio of about 40dB thus.In addition, be that next-door neighbour's fan antenna/isolation between antennas of 26dB is compared with the size of 65 ° of plate aerials of standard, next-door neighbour's fan antenna/isolation between antennas of antenna 10 approximately is 40dB.In Fig. 7, can understand,, 120 ° no sector interference zone can be provided after radiation lobe, then be referred to as " quiet taper " in the present invention through significantly reducing backside lobe.
With reference now to Fig. 8 A and 8B,, what this figure showed is the several advantages that had when use is of the present invention in three sector site.What Fig. 8 A described is the 65 ° of plate aerials of standard that in three sector site, use, and what Fig. 8 B described is the 90 ° of plate aerials of standard that in three sector site, use.The remarkable overlapping of these antenna antenna pattern will produce imperfect subregion, possibly cause thus that More Soft Handoff increases, interference signal increases, call out and abandon and capacity reduces.
With reference now to Fig. 9 A and 9B,, what this figure showed respectively is the technological merit of the present invention that in three sector site, uses according to 65 ° of plate aerials of the present invention and 90 ° of plate aerials.With reference to figure 9A, what this figure described is that the overlapping of radiation lobe of antenna significantly reduces, and realizes littler Zone switched thus.Do like this and can greatly improve call quality, and can increase by 5～10% site capacity.
Back with reference to figure 7, shown in Fig. 8 A～8B and Fig. 9 A～9B, the non-expection lobe of stretching 120 ° of radiation sector extensions can overlap with adjacent radiation pattern.The ratio of the expectation power that not expecting of transmitting in the lobe outside these 120 ° of forward sector transmits in 120 ° of sectors of power and this has defined so-called sector power ratio (SPR).Advantageously, the present invention has realized the SPR less than 2%, and wherein SPR is defined by following equality:
This SPR is a significant improvement on the dressing plate antenna, and is to be used to describe measuring of technological merit of the present invention.At 90 ohm, director 40 is impedance matchings with microstrip line 30, but can not infer in view of the above that this impedance is so limited.Radiation element 14 has mutual transient electromagnetic coupling with cross dipole directors 40, and this coupling is to be produced by 90 ohm source impedance of matching network and source voltage.Through introducing this high roll-off antenna design, much other system-level performance benefit can be provided, comprising the soft handoff capabilities of improving, the common station channel disturbance that reduces and because the base station system capacity of the sector that increases-increase that sector inhibition is produced.
With reference now to Figure 10; The figure illustrates an alternative embodiment of the invention; It can be seen that this embodiment comprises a single band bipolar (dualpol) antenna 80, this antenna comprises inclination 45 little ring (MAR with holes that tilt 45 crossed dipoles radiation elements 14 and center on said dipole; Microstrip annular ring) radiator 94 will come concise and to the point these contents of describing with reference to Figure 11 hereinafter.In this embodiment, antenna 80 comprises N annular (ring-type) director 82, the wherein N=1,2,3,4 that is deployed on the radiation element 14 ...This N director 82 is configured to the parallel polygonal member of perpendicular separation, and it is shown as concentric ring here, but can not derive said director 82 in view of the above only is confined to this geometry.Shown in figure 13, other director geometry also is operable.
The set of the annular director 82 that piles up can also comprise the ring of equal circumference, and the improvement that simultaneously still the keeps similar performance of roll-offing, and can combine aforesaid system benefit to produce the SPR of improvement thus, still keeps similar 3dB beamwidth simultaneously.
With reference now to Figure 11,, this figure has shown a double frequency band aerial at mark 90 places, and wherein this antenna comprises one group of director ring 92 that is deployed on ring little with holes (MAR) radiator 94 that piles up.In this view, four feed probes 96 (2 balanced feeding to) of paired arrangement are arranged, the biorthogonal polarization of feed MAR radiator 94.In this embodiment of the present invention, as shown in, director 92 is the thin rings that are stacked on the corresponding MAR radiator 94.Advantageously, the element pattern roll-off characteristic of the improvement that this double frequency band aerial 90 also has outside the 3dB beamwidth has improved SPR thus in the 3dB beamwidth that keeps equivalence.
With reference now to Figure 12,, what this figure showed is the double frequency band aerial 100 with annular director 82 and 92.The annular director 92 that is on the MAR radiator 94 also carries out mutual with X dipole radiation unit 14; And for X dipole radiation unit provides some additional beam shaping; The roll-off characteristic that comprises the improvement of the main beam outside the 3dB wave beam bandwidth; And the front and back radiation that improves, can in the similar 3dB beamwidth of maintenance, produce SPR and system's benefit of previous described improvement thus.
On MAR radiator elements 94 and X dipole radiation unit 14, all has the corresponding annular director.The annular director 82 that is used for X dipole radiation unit 14 still is concentric with the annular director 92 that is used for MAR radiator 94.Aforementioned benefit about director is equally applicable to each frequency band (the front and back ratio of the SPR of improved roll-off characteristic outside the 3dB beamwidth and generation improvement just) here.
With reference now to Figure 13,, what this figure showed is other suitable geometry of director 82 and 92, but should not infer in view of the above that said director only limits to the director of similar annular.Circle can be considered to be the polygon with unlimited bar limit, and what in accessory claim, use then is the term polygon.
With reference now to Figure 14,, what this figure showed is the close-up illustration of double frequency band aerial 80, wherein this double frequency band aerial 80 MAR radiator 94 of having the cross-shaped directors 40 of on radiation element 14, extending and not having relevant annular director.
With reference now to Figure 15,, this illustrates the plate aerial 110 with radiation element 14 arrays, and wherein each radiation element has cross-shaped directors 40, and as selection, this antenna also can be equipped with the MAR radiator 94 that is deployed on the common ground face 112.The advantage of this design comprises the H plane pattern of having improved the upper frequency radiation element that is used for the double frequency-band topological structure.The H plane pattern of said improvement provides the roll-off characteristic of improvement and the front and back ratio of improvement outside the 3dB beamwidth.Because the low level of side and reradiation, the roll-off characteristic of said improvement adds the radiator that provides slight according to the quantity of the director of being introduced and decouples.
Though described the present invention with reference to concrete preferred embodiment, for a person skilled in the art, under the situation of having read the application, various modifications and change will be conspicuous.Thus, accessory claim is under the situation of having considered prior art, to explain that with the wide as far as possible mode of scope the present invention has then comprised all these changes and modification.
Claims (34)
1. antenna comprises:
At least one 45 degree dipole radiation unit of tilting is suitable for producing wave beam; And
And then at least one director that said at least one 45 degree dipole radiation unit of tilting dispose is suitable for when keeping equivalent 3dB beamwidth, improving the sector power ratio (SPR) of said wave beam.
2. antenna as claimed in claim 1, wherein, said antenna has the sector power ratio less than 10%.
3. antenna as claimed in claim 2, wherein, said antenna has the sector power ratio less than 5%.
4. antenna as claimed in claim 3, wherein, said antenna has the sector power ratio less than 2%.
5. antenna as claimed in claim 1 comprises at least two directors.
6. antenna as claimed in claim 5, wherein, said at least two directors are parallel to each other.
7. antenna as claimed in claim 5, wherein, at least some directors each other evenly at interval.
8. antenna as claimed in claim 7, wherein, one of said director is compared with adjacent said director more near said radiation element.
9. antenna as claimed in claim 1, wherein, said radiation element is the crossed dipoles radiation element.
10. antenna as claimed in claim 9, wherein, said director has at least two members.
11. antenna as claimed in claim 10, wherein, said member be in vertical direction with the parallel dagger of said crossed dipoles radiation element.
12. antenna as claimed in claim 1, wherein, said at least one director comprises polygonal ring.
13. antenna as claimed in claim 12, said at least one director comprise a plurality of polygonal ring that is deployed on said at least one 45 degree dipole radiation unit of tilting.
14. antenna as claimed in claim 13, wherein, said a plurality of polygonal rings are concentric.
15. antenna as claimed in claim 14, wherein, said a plurality of polygonal rings have same diameter.
16. antenna as claimed in claim 14, wherein, said a plurality of polygonal rings have different-diameter, and form a taper director.
17. antenna as claimed in claim 10, wherein, said member has different length, and forms a taper director.
18. antenna as claimed in claim 1, wherein, said antenna has the front side ratio of 20dB at least.
19. antenna as claimed in claim 1, wherein, said antenna has the front and back ratio of 40dB at least.
20. a double frequency band aerial comprises:
First inclination, 45 degree dipole radiations units are suitable for producing first wave beam that is in first frequency;
And then first director that dipole radiations unit disposes is spent in first inclination 45, and this first director is suitable for when keeping equivalent 3dB beamwidth, improving the sector power ratio of wave beam; And
And then second radiation element that dipole radiations unit disposes is spent in first inclination 45, and this second radiation element is suitable for producing second wave beam that is in second frequency.
21. double frequency band aerial as claimed in claim 20 also comprises and then second director of second radiation element deployment, this second director is suitable for when keeping equivalent 3dB beamwidth, improving the sector power ratio of second wave beam.
22. double frequency band aerial as claimed in claim 21, wherein, said first director comprises at least two members.
23. double frequency band aerial as claimed in claim 22, wherein, said second director comprises at least two members.
24. double frequency band aerial as claimed in claim 23, wherein, said first and second directors are deployed on corresponding first inclination, the 45 degree dipole radiations units and second radiation element.
25. double frequency band aerial as claimed in claim 20, wherein, said second radiation element comprises tilting the little ring radiation element with holes of 45 degree.
26. double frequency band aerial as claimed in claim 21, wherein, said first inclination 45 is spent dipole radiation units and is comprised the cross radiator.
27. double frequency band aerial as claimed in claim 26, wherein, said second radiation element comprises the polygon radiator.
28. double frequency band aerial as claimed in claim 20, wherein, said first director comprises at least one dagger.
29. double frequency band aerial as claimed in claim 21, wherein, said second director comprises at least one polygonal member.
30. double frequency band aerial as claimed in claim 27, wherein, said first director comprises a plurality of daggers.
31. double frequency band aerial as claimed in claim 27, wherein, said second director comprises a plurality of polygonal member.
32. double frequency band aerial as claimed in claim 20, wherein, said second radiation element is around first radiation element.
33. double frequency band aerial as claimed in claim 32, wherein, said first inclination 45 is spent dipole radiation units and is comprised cross dipole radiation unit.
34. double frequency band aerial as claimed in claim 32, wherein, said second radiation element comprises polygon.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US57713804P | 2004-06-04 | 2004-06-04 | |
| US60/577,138 | 2004-06-04 | ||
| PCT/US2005/012528 WO2005122331A1 (en) | 2004-06-04 | 2005-04-13 | Directed dipole antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101080848A CN101080848A (en) | 2007-11-28 |
| CN101080848B true CN101080848B (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005800116350A Active CN101080848B (en) | 2004-06-04 | 2005-04-13 | Directed dipole antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8674895B2 (en) * | 2011-05-03 | 2014-03-18 | Andrew Llc | Multiband antenna |
| CN102780091B (en) * | 2012-07-31 | 2014-07-02 | 华南理工大学 | Circular polarization spiral antenna with high low elevation gain |
| JP5677494B2 (en) * | 2013-03-29 | 2015-02-25 | 日本電業工作株式会社 | Phase shifter, antenna and radio apparatus |
| TWI559614B (en) * | 2014-10-21 | 2016-11-21 | Chunghwa Telecom Co Ltd | Dual - frequency directional antenna device and its array |
| DE102016112257A1 (en) * | 2016-07-05 | 2018-01-11 | Kathrein-Werke Kg | Antenna arrangement with at least one dipole radiator arrangement |
| US10770803B2 (en) * | 2017-05-03 | 2020-09-08 | Commscope Technologies Llc | Multi-band base station antennas having crossed-dipole radiating elements with generally oval or rectangularly shaped dipole arms and/or common mode resonance reduction filters |
| US10290930B2 (en) * | 2017-07-18 | 2019-05-14 | Honeywell International Inc. | Crossed dipole with enhanced gain at low elevation |
| CN115473054B (en) * | 2022-09-27 | 2023-12-15 | 南京理工大学 | Rapid synthesis method of ultra-wideband circular common-caliber array |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6072439A (en) * | 1998-01-15 | 2000-06-06 | Andrew Corporation | Base station antenna for dual polarization |
| US6211841B1 (en) * | 1999-12-28 | 2001-04-03 | Nortel Networks Limited | Multi-band cellular basestation antenna |
| US6547140B2 (en) * | 2000-11-29 | 2003-04-15 | Xerox Corporation | Microwave barcode reader using dipole antenna |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6072439A (en) * | 1998-01-15 | 2000-06-06 | Andrew Corporation | Base station antenna for dual polarization |
| US6211841B1 (en) * | 1999-12-28 | 2001-04-03 | Nortel Networks Limited | Multi-band cellular basestation antenna |
| US6547140B2 (en) * | 2000-11-29 | 2003-04-15 | Xerox Corporation | Microwave barcode reader using dipole antenna |
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| CN101080848A (en) | 2007-11-28 |
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